/* * card-openpgp.c: Support for OpenPGP card * * Copyright (C) 2003 Olaf Kirch * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* * Specifications: * http://www.g10code.de/docs/openpgp-card-1.0.pdf (obsolete) * http://www.g10code.de/docs/openpgp-card-1.1.pdf * http://www.g10code.de/docs/openpgp-card-2.0.pdf * http://www.g10code.de/docs/openpgp-card-2.1.pdf (minor changes to v2.0) * http://www.g10code.de/docs/openpgp-card-3.0.pdf (not yet supported) */ #if HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include "internal.h" #include "asn1.h" #include "cardctl.h" #include "errors.h" #ifdef ENABLE_OPENSSL #include #endif /* ENABLE_OPENSSL */ static struct sc_atr_table pgp_atrs[] = { { "3b:fa:13:00:ff:81:31:80:45:00:31:c1:73:c0:01:00:00:90:00:b1", NULL, "OpenPGP card v1.0/1.1", SC_CARD_TYPE_OPENPGP_V1, 0, NULL }, { "3b:da:18:ff:81:b1:fe:75:1f:03:00:31:c5:73:c0:01:40:00:90:00:0c", NULL, "CryptoStick v1.2 (OpenPGP v2.0)", SC_CARD_TYPE_OPENPGP_V2, 0, NULL }, { "3b:da:11:ff:81:b1:fe:55:1f:03:00:31:84:73:80:01:80:00:90:00:e4", NULL, "Gnuk v1.0.x (OpenPGP v2.0)", SC_CARD_TYPE_OPENPGP_GNUK, 0, NULL }, { "3b:fc:13:00:00:81:31:fe:15:59:75:62:69:6b:65:79:4e:45:4f:72:33:e1", NULL, "Yubikey NEO (OpenPGP v2.0)", SC_CARD_TYPE_OPENPGP_V2, 0, NULL }, { "3b:f8:13:00:00:81:31:fe:15:59:75:62:69:6b:65:79:34:d4", NULL, "Yubikey 4 (OpenPGP v2.1)", SC_CARD_TYPE_OPENPGP_V2, 0, NULL }, { "3b:da:18:ff:81:b1:fe:75:1f:03:00:31:f5:73:c0:01:60:00:90:00:1c", NULL, "OpenPGP card V3", SC_CARD_TYPE_OPENPGP_V3, 0, NULL }, { NULL, NULL, NULL, 0, 0, NULL } }; static struct sc_card_operations *iso_ops; static struct sc_card_operations pgp_ops; static struct sc_card_driver pgp_drv = { "OpenPGP card", "openpgp", &pgp_ops, NULL, 0, NULL }; /* * The OpenPGP card doesn't have a file system, instead everything * is stored in data objects that are accessed through GET/PUT. * * However, much inside OpenSC's pkcs15 implementation is based on * the assumption that we have a file system. So we fake one here. * * Selecting the MF causes us to select the OpenPGP AID. * * Everything else is mapped to "file" IDs. */ enum _type { /* DO type */ SIMPLE = SC_FILE_TYPE_WORKING_EF, CONSTRUCTED = SC_FILE_TYPE_DF }; enum _version { /* 2-byte BCD-alike encoded version number */ OPENPGP_CARD_1_0 = 0x0100, OPENPGP_CARD_1_1 = 0x0101, OPENPGP_CARD_2_0 = 0x0200, OPENPGP_CARD_2_1 = 0x0201, OPENPGP_CARD_3_0 = 0x0300, OPENPGP_CARD_3_1 = 0x0301, }; enum _access { /* access flags for the respective DO/file */ READ_NEVER = 0x0010, READ_PIN1 = 0x0011, READ_PIN2 = 0x0012, READ_PIN3 = 0x0014, READ_ALWAYS = 0x0018, READ_MASK = 0x00FF, WRITE_NEVER = 0x1000, WRITE_PIN1 = 0x1100, WRITE_PIN2 = 0x1200, WRITE_PIN3 = 0x1400, WRITE_ALWAYS = 0x1800, WRITE_MASK = 0x1F00 }; enum _ext_caps { /* extended capabilities/features */ EXT_CAP_ALG_ATTR_CHANGEABLE = 0x0004, EXT_CAP_PRIVATE_DO = 0x0008, EXT_CAP_C4_CHANGEABLE = 0x0010, EXT_CAP_KEY_IMPORT = 0x0020, EXT_CAP_GET_CHALLENGE = 0x0040, EXT_CAP_SM = 0x0080, EXT_CAP_CHAINING = 0x1000, EXT_CAP_APDU_EXT = 0x2000 }; enum _card_state { CARD_STATE_UNKNOWN = 0x00, CARD_STATE_INITIALIZATION = 0x03, CARD_STATE_ACTIVATED = 0x05 }; typedef struct pgp_blob { struct pgp_blob * next; /* pointer to next sibling */ struct pgp_blob * parent; /* pointer to parent */ struct do_info *info; sc_file_t * file; unsigned int id; int status; unsigned char * data; unsigned int len; struct pgp_blob * files; /* pointer to 1st child */ } pgp_blob_t; struct do_info { unsigned int id; /* ID of the DO in question */ enum _type type; /* constructed DO or not */ enum _access access; /* R/W access levels for the DO */ /* function to get the DO from the card: * only != NULL is DO if readable and not only a part of a constructed DO */ int (*get_fn)(sc_card_t *, unsigned int, u8 *, size_t); /* function to write the DO to the card: * only != NULL if DO is writeable under some conditions */ int (*put_fn)(sc_card_t *, unsigned int, const u8 *, size_t); }; static int pgp_get_card_features(sc_card_t *card); static int pgp_finish(sc_card_t *card); static void pgp_iterate_blobs(pgp_blob_t *, int, void (*func)()); static int pgp_get_blob(sc_card_t *card, pgp_blob_t *blob, unsigned int id, pgp_blob_t **ret); static pgp_blob_t * pgp_new_blob(sc_card_t *, pgp_blob_t *, unsigned int, sc_file_t *); static void pgp_free_blob(pgp_blob_t *); static int pgp_get_pubkey(sc_card_t *, unsigned int, u8 *, size_t); static int pgp_get_pubkey_pem(sc_card_t *, unsigned int, u8 *, size_t); /* The DO holding X.509 certificate is constructed but does not contain a child DO. * We should notice this when building fake file system later. */ #define DO_CERT 0x7f21 /* Control Reference Template of private keys. Ref: Section 4.3.3.7 of OpenPGP card v2 spec. * Here we treat them as DOs just for convenience */ #define DO_SIGN 0xb600 #define DO_ENCR 0xb800 #define DO_AUTH 0xa400 /* These DOs do not exist. They are defined and used just for ease of implementation */ #define DO_SIGN_SYM 0xb601 #define DO_ENCR_SYM 0xb801 #define DO_AUTH_SYM 0xa401 /* Private DOs */ #define DO_PRIV1 0x0101 #define DO_PRIV2 0x0102 #define DO_PRIV3 0x0103 #define DO_PRIV4 0x0104 /* Cardholder information DOs */ #define DO_CARDHOLDER 0x65 #define DO_NAME 0x5b #define DO_LANG_PREF 0x5f2d #define DO_SEX 0x5f35 /* Maximum length for response buffer when reading pubkey. * This value is calculated with 4096-bit key length */ #define MAXLEN_RESP_PUBKEY 527 /* Gnuk only supports 1 key length (2048 bit) */ #define MAXLEN_RESP_PUBKEY_GNUK 271 static struct do_info pgp1_objects[] = { /* OpenPGP card spec 1.1 */ { 0x004f, SIMPLE, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { 0x005b, SIMPLE, READ_ALWAYS | WRITE_PIN3, NULL, sc_put_data }, { 0x005e, SIMPLE, READ_ALWAYS | WRITE_PIN3, sc_get_data, sc_put_data }, { 0x0065, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, sc_get_data, NULL }, { 0x006e, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, sc_get_data, NULL }, { 0x0073, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { 0x007a, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, sc_get_data, NULL }, { 0x0081, SIMPLE, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { 0x0082, SIMPLE, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { 0x0093, SIMPLE, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { 0x00c0, SIMPLE, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { 0x00c1, SIMPLE, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { 0x00c2, SIMPLE, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { 0x00c3, SIMPLE, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { 0x00c4, SIMPLE, READ_ALWAYS | WRITE_PIN3, NULL, sc_put_data }, { 0x00c5, SIMPLE, READ_ALWAYS | WRITE_PIN3, NULL, sc_put_data }, { 0x00c6, SIMPLE, READ_ALWAYS | WRITE_PIN3, NULL, sc_put_data }, { 0x00c7, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00c8, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00c9, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00ca, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00cb, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00cc, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00cd, SIMPLE, READ_ALWAYS | WRITE_PIN3, NULL, sc_put_data }, { 0x00ce, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00cf, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00d0, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00e0, CONSTRUCTED, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00e1, CONSTRUCTED, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00e2, CONSTRUCTED, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x0101, SIMPLE, READ_ALWAYS | WRITE_PIN2, sc_get_data, sc_put_data }, { 0x0102, SIMPLE, READ_ALWAYS | WRITE_PIN3, sc_get_data, sc_put_data }, { 0x0103, SIMPLE, READ_PIN2 | WRITE_PIN2, sc_get_data, sc_put_data }, { 0x0104, SIMPLE, READ_PIN3 | WRITE_PIN3, sc_get_data, sc_put_data }, { 0x3f00, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { 0x5f2d, SIMPLE, READ_ALWAYS | WRITE_PIN3, NULL, sc_put_data }, { 0x5f35, SIMPLE, READ_ALWAYS | WRITE_PIN3, NULL, sc_put_data }, { 0x5f50, SIMPLE, READ_ALWAYS | WRITE_PIN3, sc_get_data, sc_put_data }, { 0x7f49, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { DO_AUTH, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey, NULL }, { DO_AUTH_SYM, SIMPLE, READ_ALWAYS | WRITE_PIN3, pgp_get_pubkey_pem, NULL }, { DO_SIGN, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey, NULL }, { DO_SIGN_SYM, SIMPLE, READ_ALWAYS | WRITE_PIN3, pgp_get_pubkey_pem, NULL }, { DO_ENCR, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey, NULL }, { DO_ENCR_SYM, SIMPLE, READ_ALWAYS | WRITE_PIN3, pgp_get_pubkey_pem, NULL }, { 0, 0, 0, NULL, NULL }, }; static struct do_info pgp2_objects[] = { /* OpenPGP card spec 2.0 */ { 0x004d, CONSTRUCTED, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x004f, SIMPLE, READ_ALWAYS | WRITE_NEVER, sc_get_data, NULL }, { 0x005b, SIMPLE, READ_ALWAYS | WRITE_PIN3, NULL, sc_put_data }, { 0x005e, SIMPLE, READ_ALWAYS | WRITE_PIN3, sc_get_data, sc_put_data }, { 0x0065, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, sc_get_data, NULL }, { 0x006e, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, sc_get_data, NULL }, { 0x0073, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { 0x007a, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, sc_get_data, NULL }, { 0x0081, SIMPLE, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { 0x0082, SIMPLE, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { 0x0093, SIMPLE, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { 0x00c0, SIMPLE, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { 0x00c1, SIMPLE, READ_ALWAYS | WRITE_PIN3, NULL, sc_put_data }, { 0x00c2, SIMPLE, READ_ALWAYS | WRITE_PIN3, NULL, sc_put_data }, { 0x00c3, SIMPLE, READ_ALWAYS | WRITE_PIN3, NULL, sc_put_data }, { 0x00c4, SIMPLE, READ_ALWAYS | WRITE_PIN3, sc_get_data, sc_put_data }, { 0x00c5, SIMPLE, READ_ALWAYS | WRITE_PIN3, NULL, sc_put_data }, { 0x00c6, SIMPLE, READ_ALWAYS | WRITE_PIN3, NULL, sc_put_data }, { 0x00c7, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00c8, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00c9, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00ca, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00cb, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00cc, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00cd, SIMPLE, READ_ALWAYS | WRITE_PIN3, NULL, sc_put_data }, { 0x00ce, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00cf, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00d0, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00d1, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00d2, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00d3, SIMPLE, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x00f4, CONSTRUCTED, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x0101, SIMPLE, READ_ALWAYS | WRITE_PIN2, sc_get_data, sc_put_data }, { 0x0102, SIMPLE, READ_ALWAYS | WRITE_PIN3, sc_get_data, sc_put_data }, { 0x0103, SIMPLE, READ_PIN2 | WRITE_PIN2, sc_get_data, sc_put_data }, { 0x0104, SIMPLE, READ_PIN3 | WRITE_PIN3, sc_get_data, sc_put_data }, { 0x3f00, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { 0x5f2d, SIMPLE, READ_ALWAYS | WRITE_PIN3, NULL, sc_put_data }, { 0x5f35, SIMPLE, READ_ALWAYS | WRITE_PIN3, NULL, sc_put_data }, { 0x5f48, CONSTRUCTED, READ_NEVER | WRITE_PIN3, NULL, sc_put_data }, { 0x5f50, SIMPLE, READ_ALWAYS | WRITE_PIN3, sc_get_data, sc_put_data }, { 0x5f52, SIMPLE, READ_ALWAYS | WRITE_NEVER, sc_get_data, NULL }, /* The 7F21 is constructed DO in spec, but in practice, its content can be retrieved * as simple DO (no need to parse TLV). */ { DO_CERT, SIMPLE, READ_ALWAYS | WRITE_PIN3, sc_get_data, sc_put_data }, { 0x7f48, CONSTRUCTED, READ_NEVER | WRITE_NEVER, NULL, NULL }, { 0x7f49, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, NULL, NULL }, { DO_AUTH, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey, NULL }, /* The 0xA401, 0xB601, 0xB801 are just symbolic, it does not represent any real DO. * However, their R/W access condition may block the process of importing key in pkcs15init. * So we set their accesses condition as WRITE_PIN3 (writable). */ { DO_AUTH_SYM, SIMPLE, READ_ALWAYS | WRITE_PIN3, pgp_get_pubkey_pem, NULL }, { DO_SIGN, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey, NULL }, { DO_SIGN_SYM, SIMPLE, READ_ALWAYS | WRITE_PIN3, pgp_get_pubkey_pem, NULL }, { DO_ENCR, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey, NULL }, { DO_ENCR_SYM, SIMPLE, READ_ALWAYS | WRITE_PIN3, pgp_get_pubkey_pem, NULL }, { 0, 0, 0, NULL, NULL }, }; #define DRVDATA(card) ((struct pgp_priv_data *) ((card)->drv_data)) struct pgp_priv_data { pgp_blob_t * mf; pgp_blob_t * current; /* currently selected file */ enum _version bcd_version; struct do_info *pgp_objects; enum _card_state state; /* card state */ enum _ext_caps ext_caps; /* extended capabilities */ size_t max_challenge_size; size_t max_cert_size; sc_security_env_t sec_env; }; static int get_full_pgp_aid(sc_card_t *card, sc_file_t *file) { int r = 0; /* explicitly get the full aid */ r = sc_get_data(card, 0x004F, file->name, sizeof file->name); file->namelen = MAX(r, 0); return r; } /** * ABI: check if card's ATR matches one of driver's * or if the OpenPGP application is present. */ static int pgp_match_card(sc_card_t *card) { int i; i = _sc_match_atr(card, pgp_atrs, &card->type); if (i >= 0) { card->name = pgp_atrs[i].name; LOG_FUNC_RETURN(card->ctx, 1); } else { sc_path_t partial_aid; sc_file_t *file = NULL; /* select application "OpenPGP" */ sc_format_path("D276:0001:2401", &partial_aid); partial_aid.type = SC_PATH_TYPE_DF_NAME; /* OpenPGP card only supports selection *with* requested FCI */ i = iso_ops->select_file(card, &partial_aid, &file); if (SC_SUCCESS == i) { static char card_name[SC_MAX_APDU_BUFFER_SIZE] = "OpenPGP card"; card->type = SC_CARD_TYPE_OPENPGP_BASE; card->name = card_name; if (file->namelen != 16) (void) get_full_pgp_aid(card, file); if (file->namelen == 16) { unsigned char major = file->name[6]; unsigned char minor = file->name[7]; switch (major) { case 1: card->type = SC_CARD_TYPE_OPENPGP_V1; break; case 2: card->type = SC_CARD_TYPE_OPENPGP_V2; break; case 3: card->type = SC_CARD_TYPE_OPENPGP_V3; break; default: break; } snprintf(card_name, sizeof(card_name), "OpenPGP card V%u.%u", major, minor); } sc_file_free(file); return 1; } } return 0; } #define BCD2CHAR(x) (((((x) & 0xF0) >> 4) * 10) + ((x) & 0x0F)) /** * ABI: initialize driver. */ static int pgp_init(sc_card_t *card) { struct pgp_priv_data *priv; sc_path_t path; sc_file_t *file = NULL; struct do_info *info; int r; pgp_blob_t *child = NULL; LOG_FUNC_CALLED(card->ctx); priv = calloc (1, sizeof *priv); if (!priv) return SC_ERROR_OUT_OF_MEMORY; card->drv_data = priv; card->cla = 0x00; /* select application "OpenPGP" */ sc_format_path("D276:0001:2401", &path); path.type = SC_PATH_TYPE_DF_NAME; if ((r = iso_ops->select_file(card, &path, &file)) < 0) { pgp_finish(card); LOG_FUNC_RETURN(card->ctx, r); } /* defensive programming check */ if (!file) { pgp_finish(card); LOG_FUNC_RETURN(card->ctx, SC_ERROR_OBJECT_NOT_FOUND); } if (file->namelen != 16) { /* explicitly get the full aid */ r = get_full_pgp_aid(card, file); if (r < 0) { pgp_finish(card); return r; } } /* read information from AID */ if (file->namelen == 16) { /* OpenPGP card spec 1.1 & 2.0, section 4.2.1 & 4.1.2.1 */ priv->bcd_version = bebytes2ushort(file->name + 6); card->version.fw_major = card->version.hw_major = BCD2CHAR(file->name[6]); card->version.fw_minor = card->version.hw_minor = BCD2CHAR(file->name[7]); /* kludge: get card's serial number from manufacturer ID + serial number */ memcpy(card->serialnr.value, file->name + 8, 6); card->serialnr.len = 6; } else { /* set detailed card version */ switch (card->type) { case SC_CARD_TYPE_OPENPGP_V3: priv->bcd_version = OPENPGP_CARD_3_0; break; case SC_CARD_TYPE_OPENPGP_GNUK: case SC_CARD_TYPE_OPENPGP_V2: priv->bcd_version = OPENPGP_CARD_2_0; break; default: priv->bcd_version = OPENPGP_CARD_1_1; break; } } /* set pointer to correct list of card objects */ if (priv->bcd_version < OPENPGP_CARD_2_0) { priv->pgp_objects = pgp1_objects; } else { priv->pgp_objects = pgp2_objects; } /* change file path to MF for re-use in MF */ sc_format_path("3f00", &file->path); /* set up the root of our fake file tree */ priv->mf = pgp_new_blob(card, NULL, 0x3f00, file); if (!priv->mf) { pgp_finish(card); LOG_FUNC_RETURN(card->ctx, SC_ERROR_OUT_OF_MEMORY); } /* select MF */ priv->current = priv->mf; /* populate MF - add matching blobs listed in the pgp_objects table */ for (info = priv->pgp_objects; (info != NULL) && (info->id > 0); info++) { if (((info->access & READ_MASK) != READ_NEVER) && (info->get_fn != NULL)) { child = pgp_new_blob(card, priv->mf, info->id, sc_file_new()); /* catch out of memory condition */ if (child == NULL) { pgp_finish(card); LOG_FUNC_RETURN(card->ctx, SC_ERROR_OUT_OF_MEMORY); } } } /* get card_features from ATR & DOs */ pgp_get_card_features(card); LOG_FUNC_RETURN(card->ctx, SC_SUCCESS); } /** * Internal: get features of the card: capabilities, ... */ static int pgp_get_card_features(sc_card_t *card) { struct pgp_priv_data *priv = DRVDATA(card); unsigned char *hist_bytes = card->atr.value; size_t atr_len = card->atr.len; size_t i; pgp_blob_t *blob, *blob6e, *blob73; /* parse card capabilities from historical bytes */ for (i = 0; (i < atr_len) && (hist_bytes[i] != 0x73); i++) ; /* IS07816-4 hist bytes 3rd function table */ if ((hist_bytes[i] == 0x73) && (atr_len > i+3)) { /* bit 0x40 in byte 3 of TL 0x73 means "extended Le/Lc" */ if (hist_bytes[i+3] & 0x40) { card->caps |= SC_CARD_CAP_APDU_EXT; priv->ext_caps |= EXT_CAP_APDU_EXT; } /* bit 0x80 in byte 3 of TL 0x73 means "Command chaining" */ if (hist_bytes[i+3] & 0x80) priv->ext_caps |= EXT_CAP_CHAINING; } if (priv->bcd_version >= OPENPGP_CARD_2_0) { /* get card capabilities from "historical bytes" DO */ if ((pgp_get_blob(card, priv->mf, 0x5f52, &blob) >= 0) && (blob->data != NULL) && (blob->data[0] == 0x00)) { /* find beginning of "interesting" bytes */ for (i = 0; (i < blob->len) && (blob->data[i] != 0x73); i++) ; /* IS07816-4 hist bytes 3rd function table */ if ((blob->data[i] == 0x73) && (blob->len > i+3)) { /* bit 0x40 in byte 3 of TL 0x73 means "extended Le/Lc" */ if (blob->data[i+3] & 0x40) { card->caps |= SC_CARD_CAP_APDU_EXT; priv->ext_caps |= EXT_CAP_APDU_EXT; } /* bit 0x80 in byte 3 of TL 0x73 means "Command chaining" */ if (blob->data[i+3] & 0x80) priv->ext_caps |= EXT_CAP_CHAINING; } /* get card status from historical bytes status indicator */ if ((blob->data[0] == 0x00) && (blob->len >= 4)) priv->state = blob->data[blob->len-3]; } } if (priv->bcd_version >= OPENPGP_CARD_3_1) { card->caps |= SC_CARD_CAP_ISO7816_PIN_INFO; } if ((pgp_get_blob(card, priv->mf, 0x006e, &blob6e) >= 0) && (pgp_get_blob(card, blob6e, 0x0073, &blob73) >= 0)) { /* get "extended capabilities" DO */ if ((pgp_get_blob(card, blob73, 0x00c0, &blob) >= 0) && (blob->data != NULL) && (blob->len > 0)) { /* in v2.0 bit 0x04 in first byte means "algorithm attributes changeable" */ if ((blob->data[0] & 0x04) && (priv->bcd_version >= OPENPGP_CARD_2_0)) priv->ext_caps |= EXT_CAP_ALG_ATTR_CHANGEABLE; /* bit 0x08 in first byte means "support for private use DOs" */ if (blob->data[0] & 0x08) priv->ext_caps |= EXT_CAP_PRIVATE_DO; /* bit 0x10 in first byte means "support for CHV status byte changeable" */ if (blob->data[0] & 0x10) priv->ext_caps |= EXT_CAP_C4_CHANGEABLE; /* bit 0x20 in first byte means "support for Key Import" */ if (blob->data[0] & 0x20) priv->ext_caps |= EXT_CAP_KEY_IMPORT; /* bit 0x40 in first byte means "support for Get Challenge" */ if (blob->data[0] & 0x40) { card->caps |= SC_CARD_CAP_RNG; priv->ext_caps |= EXT_CAP_GET_CHALLENGE; } /* in v2.0 bit 0x80 in first byte means "support Secure Messaging" */ if ((blob->data[0] & 0x80) && (priv->bcd_version >= OPENPGP_CARD_2_0)) priv->ext_caps |= EXT_CAP_SM; if ((priv->bcd_version >= OPENPGP_CARD_2_0) && (blob->len >= 10)) { /* max. challenge size is at bytes 3-4 */ priv->max_challenge_size = bebytes2ushort(blob->data + 2); /* max. cert size it at bytes 5-6 */ priv->max_cert_size = bebytes2ushort(blob->data + 4); if (priv->bcd_version < OPENPGP_CARD_3_0) { /* max. send/receive sizes are at bytes 7-8 resp. 9-10 */ card->max_send_size = bebytes2ushort(blob->data + 6); card->max_recv_size = bebytes2ushort(blob->data + 8); } /* TODO read Extended length information from DO 7F66 in OpenPGP 3.0 and later */ } } /* get max. PIN length from "CHV status bytes" DO */ if ((pgp_get_blob(card, blob73, 0x00c4, &blob) >= 0) && (blob->data != NULL) && (blob->len > 1)) { /* 2nd byte in "CHV status bytes" DO means "max. PIN length" */ card->max_pin_len = blob->data[1]; } /* get supported algorithms & key lengths from "algorithm attributes" DOs */ for (i = 0x00c1; i <= 0x00c3; i++) { unsigned long flags; /* Is this correct? */ /* OpenPGP card spec 1.1 & 2.0, section 7.2.9 & 7.2.10 */ flags = SC_ALGORITHM_RSA_PAD_PKCS1; flags |= SC_ALGORITHM_RSA_HASH_NONE; /* Can be generated in card */ flags |= SC_ALGORITHM_ONBOARD_KEY_GEN; if ((pgp_get_blob(card, blob73, i, &blob) >= 0) && (blob->data != NULL) && (blob->len >= 4)) { if (blob->data[0] == 0x01) { /* Algorithm ID [RFC4880]: RSA */ unsigned int keylen = bebytes2ushort(blob->data + 1); /* Measured in bit */ _sc_card_add_rsa_alg(card, keylen, flags, 0); } } } } return SC_SUCCESS; } /** * ABI: terminate driver. */ static int pgp_finish(sc_card_t *card) { if (card != NULL) { struct pgp_priv_data *priv = DRVDATA(card); if (priv != NULL) { /* delete fake file hierarchy */ pgp_iterate_blobs(priv->mf, 99, pgp_free_blob); /* delete private data */ free(priv); } card->drv_data = NULL; } return SC_SUCCESS; } /** * Internal: fill a blob's data. */ static int pgp_set_blob(pgp_blob_t *blob, const u8 *data, size_t len) { if (blob->data) free(blob->data); blob->data = NULL; blob->len = 0; blob->status = 0; if (len > 0) { void *tmp = calloc(len, 1); if (tmp == NULL) return SC_ERROR_OUT_OF_MEMORY; blob->data = tmp; blob->len = (unsigned int)len; if (data != NULL) memcpy(blob->data, data, len); } if (blob->file) blob->file->size = len; return SC_SUCCESS; } /** * Internal: implement Access Control List for emulated file. * The Access Control is derived from the DO access permission. **/ static void pgp_attach_acl(sc_card_t *card, sc_file_t *file, struct do_info *info) { unsigned int method = SC_AC_NONE; unsigned long key_ref = SC_AC_KEY_REF_NONE; /* Write access */ switch (info->access & WRITE_MASK) { case WRITE_NEVER: method = SC_AC_NEVER; break; case WRITE_PIN1: method = SC_AC_CHV; key_ref = 0x01; break; case WRITE_PIN2: method = SC_AC_CHV; key_ref = 0x02; break; case WRITE_PIN3: method = SC_AC_CHV; key_ref = 0x03; break; } if (method != SC_AC_NONE || key_ref != SC_AC_KEY_REF_NONE) { sc_file_add_acl_entry(file, SC_AC_OP_WRITE, method, key_ref); sc_file_add_acl_entry(file, SC_AC_OP_UPDATE, method, key_ref); sc_file_add_acl_entry(file, SC_AC_OP_DELETE, method, key_ref); sc_file_add_acl_entry(file, SC_AC_OP_CREATE, method, key_ref); } else { /* When SC_AC_OP_DELETE is absent, we need to provide * SC_AC_OP_DELETE_SELF for sc_pkcs15init_delete_by_path() */ sc_file_add_acl_entry(file, SC_AC_OP_DELETE_SELF, method, key_ref); } method = SC_AC_NONE; key_ref = SC_AC_KEY_REF_NONE; /* Read access */ switch (info->access & READ_MASK) { case READ_NEVER: method = SC_AC_NEVER; break; case READ_PIN1: method = SC_AC_CHV; key_ref = 0x01; break; case READ_PIN2: method = SC_AC_CHV; key_ref = 0x02; break; case READ_PIN3: method = SC_AC_CHV; key_ref = 0x03; break; } if (method != SC_AC_NONE || key_ref != SC_AC_KEY_REF_NONE) { sc_file_add_acl_entry(file, SC_AC_OP_READ, method, key_ref); } } /** * Internal: append a blob to the list of children of a given parent blob. */ static pgp_blob_t * pgp_new_blob(sc_card_t *card, pgp_blob_t *parent, unsigned int file_id, sc_file_t *file) { pgp_blob_t *blob = NULL; if (file == NULL) return NULL; if ((blob = calloc(1, sizeof(pgp_blob_t))) != NULL) { struct pgp_priv_data *priv = DRVDATA(card); struct do_info *info; blob->file = file; blob->file->type = SC_FILE_TYPE_WORKING_EF; /* default */ blob->file->ef_structure = SC_FILE_EF_TRANSPARENT; blob->file->id = file_id; blob->id = file_id; blob->parent = parent; if (parent != NULL) { pgp_blob_t **p; /* set file's path = parent's path + file's id */ blob->file->path = parent->file->path; sc_append_file_id(&blob->file->path, file_id); /* append blob to list of parent's children */ for (p = &parent->files; *p != NULL; p = &(*p)->next) ; *p = blob; } else { u8 id_str[2]; /* no parent: set file's path = file's id */ /* FIXME sc_format_path expects an hex string of a file * identifier. ushort2bebytes instead delivers a two bytes binary * string */ sc_format_path((char *) ushort2bebytes(id_str, file_id), &blob->file->path); } /* find matching DO info: set file type depending on it */ for (info = priv->pgp_objects; (info != NULL) && (info->id > 0); info++) { if (info->id == file_id) { blob->info = info; blob->file->type = blob->info->type; pgp_attach_acl(card, blob->file, info); break; } } } return blob; } /** * Internal: free a blob including its content. */ static void pgp_free_blob(pgp_blob_t *blob) { if (blob) { if (blob->parent) { pgp_blob_t **p; /* remove blob from list of parent's children */ for (p = &blob->parent->files; *p != NULL && *p != blob; p = &(*p)->next) ; if (*p == blob) *p = blob->next; } sc_file_free(blob->file); if (blob->data) free(blob->data); free(blob); } } /** * Internal: iterate through the blob tree, calling a function for each blob. */ static void pgp_iterate_blobs(pgp_blob_t *blob, int level, void (*func)()) { if (blob) { if (level > 0) { pgp_blob_t *child = blob->files; while (child != NULL) { pgp_blob_t *next = child->next; pgp_iterate_blobs(child, level-1, func); child = next; } } func(blob); } } /** * Internal: read a blob's contents from card. */ static int pgp_read_blob(sc_card_t *card, pgp_blob_t *blob) { struct pgp_priv_data *priv = DRVDATA(card); if (blob->data != NULL) return SC_SUCCESS; if (blob->info == NULL) return blob->status; if (blob->info->get_fn) { /* readable, top-level DO */ u8 buffer[2048]; size_t buf_len = sizeof(buffer); int r = SC_SUCCESS; /* buffer length for certificate */ if (blob->id == DO_CERT && priv->max_cert_size > 0) { buf_len = MIN(priv->max_cert_size, sizeof(buffer)); } /* buffer length for Gnuk pubkey */ if (card->type == SC_CARD_TYPE_OPENPGP_GNUK && (blob->id == DO_AUTH || blob->id == DO_SIGN || blob->id == DO_ENCR || blob->id == DO_AUTH_SYM || blob->id == DO_SIGN_SYM || blob->id == DO_ENCR_SYM)) { buf_len = MAXLEN_RESP_PUBKEY_GNUK; } r = blob->info->get_fn(card, blob->id, buffer, buf_len); if (r < 0) { /* an error occurred */ blob->status = r; return r; } return pgp_set_blob(blob, buffer, r); } else { /* un-readable DO or part of a constructed DO */ return SC_SUCCESS; } } /* * Internal: enumerate contents of a data blob. * The OpenPGP card has a TLV encoding according ASN.1 BER-encoding rules. */ static int pgp_enumerate_blob(sc_card_t *card, pgp_blob_t *blob) { const u8 *in; int r; if (blob->files != NULL) return SC_SUCCESS; if ((r = pgp_read_blob(card, blob)) < 0) return r; in = blob->data; while ((int) blob->len > (in - blob->data)) { unsigned int cla, tag, tmptag; size_t len; const u8 *data = in; pgp_blob_t *new; r = sc_asn1_read_tag(&data, blob->len - (in - blob->data), &cla, &tag, &len); if (r < 0 || data == NULL) { sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "Unexpected end of contents\n"); return SC_ERROR_OBJECT_NOT_VALID; } /* undo ASN1's split of tag & class */ for (tmptag = tag; tmptag > 0x0FF; tmptag >>= 8) { cla <<= 8; } tag |= cla; /* Awful hack for composite DOs that have * a TLV with the DO's id encompassing the * entire blob. Example: Yubikey Neo */ if (tag == blob->id) { in = data; continue; } /* create fake file system hierarchy by * using constructed DOs as DF */ if ((new = pgp_new_blob(card, blob, tag, sc_file_new())) == NULL) return SC_ERROR_OUT_OF_MEMORY; pgp_set_blob(new, data, len); in = data + len; } return SC_SUCCESS; } /** * Internal: find a blob by ID below a given parent, filling its contents when necessary. */ static int pgp_get_blob(sc_card_t *card, pgp_blob_t *blob, unsigned int id, pgp_blob_t **ret) { pgp_blob_t *child; int r; if ((r = pgp_enumerate_blob(card, blob)) < 0) return r; for (child = blob->files; child; child = child->next) { if (child->id == id) { (void) pgp_read_blob(card, child); *ret = child; return SC_SUCCESS; } } /* This part is for "NOT FOUND" cases */ /* Special case: * Gnuk does not have default value for children of DO 65 (DOs 5B, 5F2D, 5F35) * So, if these blob was not found, we create it. */ if (blob->id == DO_CARDHOLDER && (id == DO_NAME || id == DO_LANG_PREF || id == DO_SEX)) { sc_log(card->ctx, "Create blob %X under %X", id, blob->id); child = pgp_new_blob(card, blob, id, sc_file_new()); if (child) { pgp_set_blob(child, NULL, 0); *ret = child; return SC_SUCCESS; } else sc_log(card->ctx, "Not enough memory to create blob for DO %X", id); } return SC_ERROR_FILE_NOT_FOUND; } /** * Internal: search recursively for a blob by ID below a given root. */ static int pgp_seek_blob(sc_card_t *card, pgp_blob_t *root, unsigned int id, pgp_blob_t **ret) { pgp_blob_t *child; int r; if ((r = pgp_get_blob(card, root, id, ret)) == 0) /* the sought blob is right under root */ return r; /* not found, seek deeper */ for (child = root->files; child; child = child->next) { /* The DO of SIMPLE type or the DO holding certificate * does not contain children */ if ((child->info && child->info->type == SIMPLE) || child->id == DO_CERT) continue; r = pgp_seek_blob(card, child, id, ret); if (r == 0) return r; } return SC_ERROR_FILE_NOT_FOUND; } /** * Internal: find a blob by tag - pgp_seek_blob with optimizations. */ static pgp_blob_t * pgp_find_blob(sc_card_t *card, unsigned int tag) { struct pgp_priv_data *priv = DRVDATA(card); pgp_blob_t *blob = NULL; int r; /* check if current selected blob is which we want to test */ if (priv->current->id == tag) { return priv->current; } /* look for the blob representing the DO */ r = pgp_seek_blob(card, priv->mf, tag, &blob); if (r < 0) { sc_log(card->ctx, "Failed to seek the blob representing the tag %04X. Error %d.", tag, r); return NULL; } return blob; } /** * Internal: get info for a specific tag. */ static struct do_info * pgp_get_info_by_tag(sc_card_t *card, unsigned int tag) { struct pgp_priv_data *priv = DRVDATA(card); struct do_info *info; for (info = priv->pgp_objects; (info != NULL) && (info->id > 0); info++) if (tag == info->id) return info; return NULL; } /** * Internal: strip out the parts of PKCS15 file layout in the path. * Get the reduced version which is understood by the OpenPGP card driver. * Return the index whose preceding part will be ignored. **/ static unsigned int pgp_strip_path(sc_card_t *card, const sc_path_t *path) { unsigned int start_point = 0; /* start_point will move through the path string */ if (path->len == 0) return 0; /* ignore 3F00 (MF) at the beginning */ start_point = (memcmp(path->value, "\x3f\x00", 2) == 0) ? 2 : 0; /* strip path of PKCS15-App DF (5015) */ start_point += (memcmp(path->value + start_point, "\x50\x15", 2) == 0) ? 2 : 0; return start_point; } /** * ABI: SELECT FILE. */ static int pgp_select_file(sc_card_t *card, const sc_path_t *path, sc_file_t **ret) { struct pgp_priv_data *priv = DRVDATA(card); pgp_blob_t *blob; unsigned int path_start = 0; unsigned int n; sc_path_t dummy_path; LOG_FUNC_CALLED(card->ctx); if (path->type == SC_PATH_TYPE_DF_NAME) LOG_FUNC_RETURN(card->ctx, iso_ops->select_file(card, path, ret)); if (path->len < 2 || (path->len & 1)) LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS, "invalid path length"); if (path->type == SC_PATH_TYPE_FILE_ID && path->len != 2) LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS, "invalid path type"); /* Due to pkcs15init implementation, sometimes a file at path "11001101" * need to be written (one use case is when importing key&cert from p12 file). * This file does not exist in OpenPGP but pkcs15 requires that * writing this file must be successful. * So, we pretend that selecting & writing this file is successful. * The "11001101"is defined in sc_pkcs15emu_get_df() function, pkcs15-sync.c file. */ sc_format_path("11001101", &dummy_path); if (sc_compare_path(path, &dummy_path)) { if (ret != NULL) { *ret = sc_file_new(); /* One use case of this dummy file is after writing certificate in pkcs15init. * So we set its size to be the same as max certificate size the card supports. */ (*ret)->size = priv->max_cert_size; } LOG_FUNC_RETURN(card->ctx, SC_SUCCESS); } /* ignore explicitly mentioned MF at the path's beginning */ path_start = pgp_strip_path(card, path); /* starting with the MF ... */ blob = priv->mf; /* ... recurse through the tree following the path */ for (n = path_start; n < path->len; n += 2) { unsigned int id = bebytes2ushort(path->value + n); int r = pgp_get_blob(card, blob, id, &blob); /* This file ID is referred when importing key&certificate via pkcs15init, like above. * We pretend to successfully find this inexistent file. */ if (id == 0x4402 || id == 0x5f48) { if (ret == NULL) /* No need to return file */ LOG_FUNC_RETURN(card->ctx, SC_SUCCESS); /* Else, need to return file */ *ret = sc_file_new(); (*ret)->size = priv->max_cert_size; LOG_FUNC_RETURN(card->ctx, SC_SUCCESS); } if (r < 0) { /* failure */ LOG_FUNC_RETURN(card->ctx, r); } } /* success: select file = set "current" pointer to blob found */ priv->current = blob; if (ret) sc_file_dup(ret, blob->file); LOG_FUNC_RETURN(card->ctx, SC_SUCCESS); } /** * ABI: LIST FILES. */ static int pgp_list_files(sc_card_t *card, u8 *buf, size_t buflen) { struct pgp_priv_data *priv = DRVDATA(card); pgp_blob_t *blob; unsigned int k; int r; LOG_FUNC_CALLED(card->ctx); /* jump to selected file */ blob = priv->current; if (blob->file->type != SC_FILE_TYPE_DF) LOG_TEST_RET(card->ctx, SC_ERROR_OBJECT_NOT_VALID, "invalid file type"); if ((r = pgp_enumerate_blob(card, blob)) < 0) LOG_FUNC_RETURN(card->ctx, r); for (k = 0, blob = blob->files; blob != NULL; blob = blob->next) { if (blob->info != NULL && (blob->info->access & READ_MASK) != READ_NEVER) { if (k + 2 > buflen) LOG_FUNC_RETURN(card->ctx, SC_ERROR_BUFFER_TOO_SMALL); ushort2bebytes(buf + k, blob->id); k += 2; } } LOG_FUNC_RETURN(card->ctx, k); } static int pgp_get_challenge(struct sc_card *card, u8 *rnd, size_t len) { struct pgp_priv_data *priv = DRVDATA(card); LOG_FUNC_CALLED(card->ctx); if (0 == (priv->ext_caps & EXT_CAP_GET_CHALLENGE)) { LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_SUPPORTED); } if (priv->max_challenge_size > 0 && len > priv->max_challenge_size) { LOG_FUNC_RETURN(card->ctx, SC_ERROR_WRONG_LENGTH); } LOG_FUNC_RETURN(card->ctx, iso_ops->get_challenge(card, rnd, len)); } /** * ABI: READ BINARY. */ static int pgp_read_binary(sc_card_t *card, unsigned int idx, u8 *buf, size_t count, unsigned long flags) { struct pgp_priv_data *priv = DRVDATA(card); pgp_blob_t *blob; int r; LOG_FUNC_CALLED(card->ctx); /* jump to selected file */ blob = priv->current; if (blob == NULL) LOG_FUNC_RETURN(card->ctx, SC_ERROR_FILE_NOT_FOUND); if (blob->file->type != SC_FILE_TYPE_WORKING_EF) LOG_FUNC_RETURN(card->ctx, SC_ERROR_FILE_NOT_FOUND); if ((r = pgp_read_blob(card, blob)) < 0) LOG_FUNC_RETURN(card->ctx, r); if (idx > blob->len) LOG_FUNC_RETURN(card->ctx, SC_ERROR_INCORRECT_PARAMETERS); if (idx + count > blob->len) count = blob->len - idx; memcpy(buf, blob->data + idx, count); LOG_FUNC_RETURN(card->ctx, (int)count); } /** * ABI: WRITE BINARY. */ static int pgp_write_binary(sc_card_t *card, unsigned int idx, const u8 *buf, size_t count, unsigned long flags) { LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_SUPPORTED); } /** * Internal: get public key from card: as DF + sub-wEFs. */ static int pgp_get_pubkey(sc_card_t *card, unsigned int tag, u8 *buf, size_t buf_len) { sc_apdu_t apdu; u8 apdu_case = (card->type == SC_CARD_TYPE_OPENPGP_GNUK) ? SC_APDU_CASE_4_SHORT : SC_APDU_CASE_4; u8 idbuf[2]; int r; sc_log(card->ctx, "called, tag=%04x\n", tag); sc_format_apdu(card, &apdu, apdu_case, 0x47, 0x81, 0); apdu.lc = 2; apdu.data = ushort2bebytes(idbuf, tag); apdu.datalen = 2; apdu.le = ((buf_len >= 256) && !(card->caps & SC_CARD_CAP_APDU_EXT)) ? 256 : buf_len; apdu.resp = buf; apdu.resplen = buf_len; r = sc_transmit_apdu(card, &apdu); LOG_TEST_RET(card->ctx, r, "APDU transmit failed"); r = sc_check_sw(card, apdu.sw1, apdu.sw2); LOG_TEST_RET(card->ctx, r, "Card returned error"); LOG_FUNC_RETURN(card->ctx, (int)apdu.resplen); } /** * Internal: get public key from card: as one wEF. */ static int pgp_get_pubkey_pem(sc_card_t *card, unsigned int tag, u8 *buf, size_t buf_len) { struct pgp_priv_data *priv = DRVDATA(card); pgp_blob_t *blob, *mod_blob, *exp_blob; sc_pkcs15_pubkey_t pubkey; u8 *data; size_t len; int r; sc_log(card->ctx, "called, tag=%04x\n", tag); if ((r = pgp_get_blob(card, priv->mf, tag & 0xFFFE, &blob)) < 0 || (r = pgp_get_blob(card, blob, 0x7F49, &blob)) < 0 || (r = pgp_get_blob(card, blob, 0x0081, &mod_blob)) < 0 || (r = pgp_get_blob(card, blob, 0x0082, &exp_blob)) < 0 || (r = pgp_read_blob(card, mod_blob)) < 0 || (r = pgp_read_blob(card, exp_blob)) < 0) LOG_TEST_RET(card->ctx, r, "error getting elements"); memset(&pubkey, 0, sizeof(pubkey)); pubkey.algorithm = SC_ALGORITHM_RSA; pubkey.u.rsa.modulus.data = mod_blob->data; pubkey.u.rsa.modulus.len = mod_blob->len; pubkey.u.rsa.exponent.data = exp_blob->data; pubkey.u.rsa.exponent.len = exp_blob->len; r = sc_pkcs15_encode_pubkey(card->ctx, &pubkey, &data, &len); LOG_TEST_RET(card->ctx, r, "public key encoding failed"); if (len > buf_len) len = buf_len; memcpy(buf, data, len); free(data); LOG_FUNC_RETURN(card->ctx, (int)len); } /** * ABI: GET DATA. */ static int pgp_get_data(sc_card_t *card, unsigned int tag, u8 *buf, size_t buf_len) { sc_apdu_t apdu; int r; LOG_FUNC_CALLED(card->ctx); sc_format_apdu(card, &apdu, SC_APDU_CASE_2, 0xCA, tag >> 8, tag); apdu.le = ((buf_len >= 256) && !(card->caps & SC_CARD_CAP_APDU_EXT)) ? 256 : buf_len; apdu.resp = buf; apdu.resplen = buf_len; r = sc_transmit_apdu(card, &apdu); LOG_TEST_RET(card->ctx, r, "APDU transmit failed"); r = sc_check_sw(card, apdu.sw1, apdu.sw2); /* For Gnuk card, if there is no certificate, it returns error instead of empty data. * So, for this case, we ignore error and consider success */ if (r == SC_ERROR_DATA_OBJECT_NOT_FOUND && card->type == SC_CARD_TYPE_OPENPGP_GNUK && (tag == DO_CERT || tag == DO_PRIV1 || tag == DO_PRIV2 || tag == DO_PRIV3 || tag == DO_PRIV4)) { r = SC_SUCCESS; apdu.resplen = 0; } LOG_TEST_RET(card->ctx, r, "Card returned error"); LOG_FUNC_RETURN(card->ctx, (int)apdu.resplen); } /** * Internal: write certificate for Gnuk. */ static int gnuk_write_certificate(sc_card_t *card, const u8 *buf, size_t length) { size_t i = 0; sc_apdu_t apdu; int r = SC_SUCCESS; LOG_FUNC_CALLED(card->ctx); /* If null data is passed, delete certificate */ if (buf == NULL || length == 0) { sc_format_apdu(card, &apdu, SC_APDU_CASE_1, 0xD6, 0x85, 0); r = sc_transmit_apdu(card, &apdu); LOG_TEST_RET(card->ctx, r, "APDU transmit failed"); /* Check response */ LOG_TEST_RET(card->ctx, sc_check_sw(card, apdu.sw1, apdu.sw2), "Certificate writing failed"); } /* Ref: gnuk_put_binary_libusb.py and gnuk_token.py in Gnuk source tree */ /* Split data to segments of 256 bytes. Send each segment via command chaining, * with particular P1 byte for each segment */ for (i = 0; i*256 < length; i++) { u8 *part = (u8 *)buf + i*256; size_t plen = MIN(length - i*256, 256); u8 roundbuf[256]; /* space to build APDU data with even length for Gnuk */ sc_log(card->ctx, "Write part %"SC_FORMAT_LEN_SIZE_T"u from offset 0x%"SC_FORMAT_LEN_SIZE_T"X, len %"SC_FORMAT_LEN_SIZE_T"u", i+1, i*256, plen); /* 1st chunk: P1 = 0x85, further chunks: P1 = chunk no */ sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0xD6, (i == 0) ? 0x85 : i, 0); apdu.flags |= SC_APDU_FLAGS_CHAINING; apdu.data = part; apdu.datalen = apdu.lc = plen; /* If the last part has odd length, we add zero padding to make it even. * Gnuk does not allow data with odd length */ if (plen < 256 && (plen % 2) != 0) { memcpy(roundbuf, part, plen); roundbuf[plen++] = 0; apdu.data = roundbuf; apdu.datalen = apdu.lc = plen; } r = sc_transmit_apdu(card, &apdu); LOG_TEST_RET(card->ctx, r, "APDU transmit failed"); /* Check response */ LOG_TEST_RET(card->ctx, sc_check_sw(card, apdu.sw1, apdu.sw2), "UPDATE BINARY returned error"); } LOG_FUNC_RETURN(card->ctx, (int)length); } /** * Internal: use PUT DATA command to write. */ static int pgp_put_data_plain(sc_card_t *card, unsigned int tag, const u8 *buf, size_t buf_len) { struct pgp_priv_data *priv = DRVDATA(card); sc_apdu_t apdu; u8 ins = 0xDA; u8 p1 = tag >> 8; u8 p2 = tag & 0xFF; u8 apdu_case = (card->type == SC_CARD_TYPE_OPENPGP_GNUK) ? SC_APDU_CASE_3_SHORT : SC_APDU_CASE_3; int r; LOG_FUNC_CALLED(card->ctx); /* Extended Header list (004D DO) needs a variant of PUT DATA command */ if (tag == 0x004D) { ins = 0xDB; p1 = 0x3F; p2 = 0xFF; } /* build APDU */ if (buf != NULL && buf_len > 0) { sc_format_apdu(card, &apdu, apdu_case, ins, p1, p2); /* if card/reader does not support extended APDUs, but chaining, then set it */ if (((card->caps & SC_CARD_CAP_APDU_EXT) == 0) && (priv->ext_caps & EXT_CAP_CHAINING)) apdu.flags |= SC_APDU_FLAGS_CHAINING; apdu.data = (u8 *)buf; apdu.datalen = buf_len; apdu.lc = buf_len; } else { /* This case is to empty DO */ sc_format_apdu(card, &apdu, SC_APDU_CASE_1, ins, p1, p2); } /* send APDU to card */ r = sc_transmit_apdu(card, &apdu); LOG_TEST_RET(card->ctx, r, "APDU transmit failed"); /* check response */ r = sc_check_sw(card, apdu.sw1, apdu.sw2); if (r < 0) LOG_FUNC_RETURN(card->ctx, r); LOG_FUNC_RETURN(card->ctx, (int)buf_len); } /** * ABI: PUT DATA. */ static int pgp_put_data(sc_card_t *card, unsigned int tag, const u8 *buf, size_t buf_len) { struct pgp_priv_data *priv = DRVDATA(card); pgp_blob_t *affected_blob = NULL; struct do_info *dinfo = NULL; int r; LOG_FUNC_CALLED(card->ctx); /* check if the tag is writable */ if (priv->current->id != tag) affected_blob = pgp_find_blob(card, tag); /* Non-readable DOs have no represented blob, we have to check from pgp_get_info_by_tag */ if (affected_blob == NULL) dinfo = pgp_get_info_by_tag(card, tag); else dinfo = affected_blob->info; if (dinfo == NULL) { sc_log(card->ctx, "The DO %04X does not exist.", tag); LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS); } else if ((dinfo->access & WRITE_MASK) == WRITE_NEVER) { sc_log(card->ctx, "DO %04X is not writable.", tag); LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_ALLOWED); } /* Check data size. * We won't check other DOs than 7F21 (certificate), because their capacity * is hard-coded and may change in various version of the card. * If we check here, the driver may be stuck to a limit version number of card. * 7F21 size is soft-coded, so we can check it. */ if (tag == DO_CERT && buf_len > priv->max_cert_size) { sc_log(card->ctx, "Data size %"SC_FORMAT_LEN_SIZE_T"u exceeds DO size limit %"SC_FORMAT_LEN_SIZE_T"u.", buf_len, priv->max_cert_size); LOG_FUNC_RETURN(card->ctx, SC_ERROR_WRONG_LENGTH); } if (tag == DO_CERT && card->type == SC_CARD_TYPE_OPENPGP_GNUK) { /* Gnuk need a special way to write certificate. */ r = gnuk_write_certificate(card, buf, buf_len); } else { r = pgp_put_data_plain(card, tag, buf, buf_len); } /* instruct more in case of error */ if (r == SC_ERROR_SECURITY_STATUS_NOT_SATISFIED) { sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Please verify PIN first."); } LOG_TEST_RET(card->ctx, r, "PUT DATA returned error"); if (affected_blob) { /* update the corresponding file */ sc_log(card->ctx, "Updating the corresponding blob data"); r = pgp_set_blob(affected_blob, buf, buf_len); if (r < 0) sc_log(card->ctx, "Failed to update blob %04X. Error %d.", affected_blob->id, r); /* pgp_set_blob()'s failures do not impact pgp_put_data()'s result */ } LOG_FUNC_RETURN(card->ctx, (int)buf_len); } /** * ABI: PIN cmd: verify/change/unblock a PIN. */ static int pgp_pin_cmd(sc_card_t *card, struct sc_pin_cmd_data *data, int *tries_left) { struct pgp_priv_data *priv = DRVDATA(card); LOG_FUNC_CALLED(card->ctx); if (data->pin_type != SC_AC_CHV) LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS, "invalid PIN type"); /* In general, the PIN Reference is extracted from the key-id, * for example, CHV0 -> Ref=0, CHV1 -> Ref=1. * However, in the case of OpenGPG, the PIN Ref to compose APDU * must be 81, 82, 83. * So, if we receive Ref=1, Ref=2, we must convert to 81, 82... * In OpenPGP v1, the PINs are named CHV1, CHV2, CHV3. * In v2, they are named PW1, PW3 (PW1 operates in 2 modes). * * The PIN references (P2 in APDU) for "VERIFY" are the same in both versions: * 81 (CHV1 or PW1), 82 (CHV2 or PW1-mode 2), 83 (CHV3 or PW3), * On the other hand from version 2.0 "CHANGE REFERENCE DATA" and * "RESET RETRY COUNTER" don't support PW1-mode 2 (82) and need this * value changed to PW1 (81). * Both of these commands also differ between card versions in that * v1 cards can use only implicit old PIN or CHV3 test for both commands * whereas v2 can use both implicit (for PW3) and explicit * (for special "Resetting Code") PIN test for "RESET RETRY COUNTER" * and only explicit test for "CHANGE REFERENCE DATA". * * Note that if this function is called from sc_pkcs15_verify_pin() in pkcs15-pin.c, * the Ref is already 81, 82, 83. */ /* convert the PIN Reference if needed */ data->pin_reference |= 0x80; /* check version-dependent constraints */ if (data->cmd == SC_PIN_CMD_CHANGE || data->cmd == SC_PIN_CMD_UNBLOCK) { if (priv->bcd_version >= OPENPGP_CARD_2_0) { if (data->pin_reference == 0x82) data->pin_reference = 0x81; if (data->cmd == SC_PIN_CMD_CHANGE) { if (data->pin1.len == 0 && !(data->flags & SC_PIN_CMD_USE_PINPAD)) LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS, "v2 cards don't support implicit old PIN for PIN change."); data->flags &= ~SC_PIN_CMD_IMPLICIT_CHANGE; } } else { if (data->pin1.len != 0) { sc_log(card->ctx, "v1 cards don't support explicit old or CHV3 PIN, PIN ignored."); sc_log(card->ctx, "please make sure that you have verified the relevant PIN first."); data->pin1.len = 0; } data->flags |= SC_PIN_CMD_IMPLICIT_CHANGE; } } if (data->cmd == SC_PIN_CMD_UNBLOCK && data->pin2.len == 0 && !(data->flags & SC_PIN_CMD_USE_PINPAD)) LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS, "new PIN must be provided for unblock operation."); /* ensure pin_reference is 81, 82, 83 */ if (!(data->pin_reference == 0x81 || data->pin_reference == 0x82 || data->pin_reference == 0x83)) { LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS, "key-id should be 1, 2, 3."); } LOG_FUNC_RETURN(card->ctx, iso_ops->pin_cmd(card, data, tries_left)); } int pgp_logout(struct sc_card *card) { int r = SC_SUCCESS; struct pgp_priv_data *priv = DRVDATA(card); LOG_FUNC_CALLED(card->ctx); if (priv->bcd_version >= OPENPGP_CARD_3_1) { unsigned char pin_reference; for (pin_reference = 0x81; pin_reference <= 0x83; pin_reference++) { int tmp = iso7816_logout(card, pin_reference); if (r == SC_SUCCESS) { r = tmp; } } } else { sc_path_t path; sc_file_t *file = NULL; /* select application "OpenPGP" */ sc_format_path("D276:0001:2401", &path); path.type = SC_PATH_TYPE_DF_NAME; r = iso_ops->select_file(card, &path, &file); sc_file_free(file); } LOG_FUNC_RETURN(card->ctx, r); } /** * ABI: set security environment. */ static int pgp_set_security_env(sc_card_t *card, const sc_security_env_t *env, int se_num) { struct pgp_priv_data *priv = DRVDATA(card); LOG_FUNC_CALLED(card->ctx); if ((env->flags & SC_SEC_ENV_ALG_PRESENT) && (env->algorithm != SC_ALGORITHM_RSA)) LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS, "only RSA algorithm supported"); if (!(env->flags & SC_SEC_ENV_KEY_REF_PRESENT) || (env->key_ref_len != 1)) LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS, "exactly one key reference required"); if (env->flags & SC_SEC_ENV_FILE_REF_PRESENT) LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS, "passing file references not supported"); sc_log(card->ctx, "Key ref %d", env->key_ref[0]); switch (env->operation) { case SC_SEC_OPERATION_SIGN: sc_log(card->ctx, "Operation: Sign."); if (env->key_ref[0] != 0x00 && env->key_ref[0] != 0x02) { LOG_TEST_RET(card->ctx, SC_ERROR_NOT_SUPPORTED, "Key reference not compatible with " "requested usage"); } break; case SC_SEC_OPERATION_DECIPHER: sc_log(card->ctx, "Operation: Decipher."); /* we allow key ref 2 (auth key) to be used for deciphering */ if (env->key_ref[0] != 0x01 && env->key_ref[0] != 0x02) { LOG_TEST_RET(card->ctx, SC_ERROR_NOT_SUPPORTED, "Key reference not compatible with " "requested usage"); } break; default: LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS, "invalid operation"); } priv->sec_env = *env; LOG_FUNC_RETURN(card->ctx, SC_SUCCESS); } /** * ABI: COMPUTE DIGITAL SIGNATURE. */ static int pgp_compute_signature(sc_card_t *card, const u8 *data, size_t data_len, u8 * out, size_t outlen) { struct pgp_priv_data *priv = DRVDATA(card); sc_security_env_t *env = &priv->sec_env; sc_apdu_t apdu; u8 apdu_case = (card->type == SC_CARD_TYPE_OPENPGP_GNUK) ? SC_APDU_CASE_4_SHORT : SC_APDU_CASE_4; int r; LOG_FUNC_CALLED(card->ctx); if (env->operation != SC_SEC_OPERATION_SIGN) LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS, "invalid operation"); switch (env->key_ref[0]) { case 0x00: /* signature key */ /* PSO SIGNATURE */ sc_format_apdu(card, &apdu, apdu_case, 0x2A, 0x9E, 0x9A); break; case 0x02: /* authentication key */ /* INTERNAL AUTHENTICATE */ sc_format_apdu(card, &apdu, apdu_case, 0x88, 0, 0); break; case 0x01: default: LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS, "invalid key reference"); } /* if card/reader does not support extended APDUs, but chaining, then set it */ if (((card->caps & SC_CARD_CAP_APDU_EXT) == 0) && (priv->ext_caps & EXT_CAP_CHAINING)) apdu.flags |= SC_APDU_FLAGS_CHAINING; apdu.lc = data_len; apdu.data = (u8 *)data; apdu.datalen = data_len; apdu.le = ((outlen >= 256) && !(card->caps & SC_CARD_CAP_APDU_EXT)) ? 256 : outlen; apdu.resp = out; apdu.resplen = outlen; r = sc_transmit_apdu(card, &apdu); LOG_TEST_RET(card->ctx, r, "APDU transmit failed"); r = sc_check_sw(card, apdu.sw1, apdu.sw2); LOG_TEST_RET(card->ctx, r, "Card returned error"); LOG_FUNC_RETURN(card->ctx, (int)apdu.resplen); } /** * ABI: DECIPHER. */ static int pgp_decipher(sc_card_t *card, const u8 *in, size_t inlen, u8 *out, size_t outlen) { struct pgp_priv_data *priv = DRVDATA(card); sc_security_env_t *env = &priv->sec_env; sc_apdu_t apdu; u8 apdu_case = SC_APDU_CASE_4; u8 *temp = NULL; int r; LOG_FUNC_CALLED(card->ctx); /* There's some funny padding indicator that must be * prepended... hmm. */ if (!(temp = malloc(inlen + 1))) LOG_FUNC_RETURN(card->ctx, SC_ERROR_OUT_OF_MEMORY); temp[0] = '\0'; memcpy(temp + 1, in, inlen); in = temp; inlen += 1; if (env->operation != SC_SEC_OPERATION_DECIPHER) { free(temp); LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS, "invalid operation"); } switch (env->key_ref[0]) { case 0x01: /* Decryption key */ case 0x02: /* authentication key */ /* PSO DECIPHER */ sc_format_apdu(card, &apdu, apdu_case, 0x2A, 0x80, 0x86); break; case 0x00: /* signature key */ default: free(temp); LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS, "invalid key reference"); } /* Gnuk only supports short APDU, so we need to use command chaining */ if (card->type == SC_CARD_TYPE_OPENPGP_GNUK) { apdu.flags |= SC_APDU_FLAGS_CHAINING; } /* if card/reader does not support extended APDUs, but chaining, then set it */ if (((card->caps & SC_CARD_CAP_APDU_EXT) == 0) && (priv->ext_caps & EXT_CAP_CHAINING)) apdu.flags |= SC_APDU_FLAGS_CHAINING; apdu.lc = inlen; apdu.data = (u8 *)in; apdu.datalen = inlen; apdu.le = ((outlen >= 256) && !(card->caps & SC_CARD_CAP_APDU_EXT)) ? 256 : outlen; apdu.resp = out; apdu.resplen = outlen; r = sc_transmit_apdu(card, &apdu); free(temp); LOG_TEST_RET(card->ctx, r, "APDU transmit failed"); r = sc_check_sw(card, apdu.sw1, apdu.sw2); LOG_TEST_RET(card->ctx, r, "Card returned error"); LOG_FUNC_RETURN(card->ctx, (int)apdu.resplen); } #ifdef ENABLE_OPENSSL /** * Internal: update algorithm attribute for new key size (before generating key). **/ static int pgp_update_new_algo_attr(sc_card_t *card, sc_cardctl_openpgp_keygen_info_t *key_info) { struct pgp_priv_data *priv = DRVDATA(card); pgp_blob_t *algo_blob; unsigned int old_modulus_len; /* measured in bits */ unsigned int old_exponent_len; const unsigned int tag = 0x00C0 | key_info->keytype; u8 changed = 0; int r = SC_SUCCESS; LOG_FUNC_CALLED(card->ctx); /* get old algorithm attributes */ r = pgp_seek_blob(card, priv->mf, (0x00C0 | key_info->keytype), &algo_blob); LOG_TEST_RET(card->ctx, r, "Cannot get old algorithm attributes"); old_modulus_len = bebytes2ushort(algo_blob->data + 1); /* modulus length is coded in byte 2 & 3 */ sc_log(card->ctx, "Old modulus length %d, new %"SC_FORMAT_LEN_SIZE_T"u.", old_modulus_len, key_info->modulus_len); old_exponent_len = bebytes2ushort(algo_blob->data + 3); /* exponent length is coded in byte 3 & 4 */ sc_log(card->ctx, "Old exponent length %d, new %"SC_FORMAT_LEN_SIZE_T"u.", old_exponent_len, key_info->exponent_len); /* Modulus */ /* If passed modulus_len is zero, it means using old key size */ if (key_info->modulus_len == 0) { sc_log(card->ctx, "Use old modulus length (%d).", old_modulus_len); key_info->modulus_len = old_modulus_len; } /* To generate key with new key size */ else if (old_modulus_len != key_info->modulus_len) { algo_blob->data[1] = (unsigned char)(key_info->modulus_len >> 8); algo_blob->data[2] = (unsigned char)key_info->modulus_len; changed = 1; } /* Exponent */ if (key_info->exponent_len == 0) { sc_log(card->ctx, "Use old exponent length (%d).", old_exponent_len); key_info->exponent_len = old_exponent_len; } else if (old_exponent_len != key_info->exponent_len) { algo_blob->data[3] = (unsigned char)(key_info->exponent_len >> 8); algo_blob->data[4] = (unsigned char)key_info->exponent_len; changed = 1; } /* If the key to-be-generated has different size, * set this new value for GENERATE ASYMMETRIC KEY PAIR to work */ if (changed) { r = pgp_put_data(card, tag, algo_blob->data, 6); /* Note: Don't use pgp_set_blob to set data, because it won't touch the real DO */ LOG_TEST_RET(card->ctx, r, "Cannot set new algorithm attributes"); } LOG_FUNC_RETURN(card->ctx, r); } /** * Internal: store creation time of key. * Pass non-zero outtime to use predefined time. * Pass zero/null outtime to calculate current time. outtime then will be output. * Pass null outtime to not receive output. **/ static int pgp_store_creationtime(sc_card_t *card, u8 key_id, time_t *outtime) { int r; time_t createtime = 0; const size_t timestrlen = 64; char timestring[65]; u8 buf[4]; LOG_FUNC_CALLED(card->ctx); if (key_id == 0 || key_id > 3) { sc_log(card->ctx, "Invalid key ID %d.", key_id); LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_DATA); } if (outtime != NULL && *outtime != 0) createtime = *outtime; else if (outtime != NULL) /* set output */ *outtime = createtime = time(NULL); strftime(timestring, timestrlen, "%c %Z", gmtime(&createtime)); sc_log(card->ctx, "Creation time %s.", timestring); /* Code borrowed from GnuPG */ ulong2bebytes(buf, (unsigned long)createtime); r = pgp_put_data(card, 0x00CD + key_id, buf, 4); LOG_TEST_RET(card->ctx, r, "Cannot write to DO"); LOG_FUNC_RETURN(card->ctx, r); } /** * Internal: calculate PGP fingerprints. * Reference: GnuPG, app-openpgp.c. * modulus and exponent are passed separately from key_info * because key_info->exponent may be null. **/ static int pgp_calculate_and_store_fingerprint(sc_card_t *card, time_t ctime, u8* modulus, u8* exponent, sc_cardctl_openpgp_keygen_info_t *key_info) { u8 fingerprint[SHA_DIGEST_LENGTH]; size_t mlen = key_info->modulus_len >> 3; /* 1/8 */ size_t elen = key_info->exponent_len >> 3; /* 1/8 */ u8 *fp_buffer = NULL; /* fingerprint buffer, not hashed */ size_t fp_buffer_len; u8 *p; /* use this pointer to set fp_buffer content */ size_t pk_packet_len; unsigned int tag; pgp_blob_t *fpseq_blob; u8 *newdata; int r; LOG_FUNC_CALLED(card->ctx); if (modulus == NULL || exponent == NULL || mlen == 0 || elen == 0) { sc_log(card->ctx, "Null data (modulus or exponent)"); LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS); } /* http://tools.ietf.org/html/rfc4880 page 41, 72 */ pk_packet_len = 1 /* version number */ + 4 /* creation time */ + 1 /* algorithm */ + 2 /* algorithm-specific fields: RSA modulus+exponent */ + mlen + 2 + elen; fp_buffer_len = 3 + pk_packet_len; p = fp_buffer = calloc(fp_buffer_len, 1); if (!p) { LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_ENOUGH_MEMORY); } p[0] = 0x99; /* http://tools.ietf.org/html/rfc4880 page 71 */ ushort2bebytes(++p, (unsigned short)pk_packet_len); /* start pk_packet */ p += 2; *p = 4; /* Version 4 key */ ulong2bebytes(++p, (unsigned long)ctime); /* Creation time */ p += 4; *p = 1; /* RSA */ /* algorithm-specific fields */ ushort2bebytes(++p, (unsigned short)key_info->modulus_len); p += 2; memcpy(p, modulus, mlen); p += mlen; ushort2bebytes(++p, (unsigned short)key_info->exponent_len); p += 2; memcpy(p, exponent, elen); p = NULL; /* hash with SHA-1 */ SHA1(fp_buffer, fp_buffer_len, fingerprint); free(fp_buffer); /* store to DO */ tag = 0x00C6 + key_info->keytype; sc_log(card->ctx, "Write to DO %04X.", tag); r = pgp_put_data(card, 0x00C6 + key_info->keytype, fingerprint, SHA_DIGEST_LENGTH); LOG_TEST_RET(card->ctx, r, "Cannot write to DO."); /* update the blob containing fingerprints (00C5) */ sc_log(card->ctx, "Update the blob containing fingerprints (00C5)"); fpseq_blob = pgp_find_blob(card, 0x00C5); if (!fpseq_blob) { sc_log(card->ctx, "Not found 00C5"); goto exit; } /* save the fingerprints sequence */ newdata = malloc(fpseq_blob->len); if (!newdata) { sc_log(card->ctx, "Not enough memory to update fingerprints blob."); goto exit; } memcpy(newdata, fpseq_blob->data, fpseq_blob->len); /* move p to the portion holding the fingerprint of the current key */ p = newdata + 20*(key_info->keytype - 1); /* copy new fingerprint value */ memcpy(p, fingerprint, 20); /* set blob's data */ pgp_set_blob(fpseq_blob, newdata, fpseq_blob->len); free(newdata); exit: LOG_FUNC_RETURN(card->ctx, r); } /** * Internal: update pubkey blob. * Note that modulus_len, exponent_len is measured in bit. **/ static int pgp_update_pubkey_blob(sc_card_t *card, u8* modulus, size_t modulus_len, u8* exponent, size_t exponent_len, u8 key_id) { struct pgp_priv_data *priv = DRVDATA(card); pgp_blob_t *pk_blob; unsigned int blob_id; sc_pkcs15_pubkey_t pubkey; u8 *data = NULL; size_t len; int r; LOG_FUNC_CALLED(card->ctx); if (key_id == SC_OPENPGP_KEY_SIGN) blob_id = DO_SIGN_SYM; else if (key_id == SC_OPENPGP_KEY_ENCR) blob_id = DO_ENCR_SYM; else if (key_id == SC_OPENPGP_KEY_AUTH) blob_id = DO_AUTH_SYM; else { sc_log(card->ctx, "Unknown key id %X.", key_id); LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS); } sc_log(card->ctx, "Get the blob %X.", blob_id); r = pgp_get_blob(card, priv->mf, blob_id, &pk_blob); LOG_TEST_RET(card->ctx, r, "Cannot get the blob."); /* encode pubkey */ memset(&pubkey, 0, sizeof(pubkey)); pubkey.algorithm = SC_ALGORITHM_RSA; pubkey.u.rsa.modulus.data = modulus; pubkey.u.rsa.modulus.len = modulus_len >> 3; /* 1/8 */ pubkey.u.rsa.exponent.data = exponent; pubkey.u.rsa.exponent.len = exponent_len >> 3; r = sc_pkcs15_encode_pubkey(card->ctx, &pubkey, &data, &len); LOG_TEST_RET(card->ctx, r, "Cannot encode pubkey."); sc_log(card->ctx, "Update blob content."); r = pgp_set_blob(pk_blob, data, len); LOG_TEST_RET(card->ctx, r, "Cannot update blob content."); LOG_FUNC_RETURN(card->ctx, r); } /** * Internal: parse response data and set output **/ static int pgp_parse_and_set_pubkey_output(sc_card_t *card, u8* data, size_t data_len, sc_cardctl_openpgp_keygen_info_t *key_info) { time_t ctime = 0; u8 *in = data; u8 *modulus = NULL; u8 *exponent = NULL; int r; LOG_FUNC_CALLED(card->ctx); /* store creation time */ r = pgp_store_creationtime(card, key_info->keytype, &ctime); LOG_TEST_RET(card->ctx, r, "Cannot store creation time"); /* parse response. Ref: pgp_enumerate_blob() */ while (data_len > (size_t) (in - data)) { unsigned int cla, tag, tmptag; size_t len; u8 *part = in; /* parse TLV structure */ r = sc_asn1_read_tag((const u8**)&part, data_len - (in - data), &cla, &tag, &len); if (part == NULL) r = SC_ERROR_ASN1_OBJECT_NOT_FOUND; LOG_TEST_RET(card->ctx, r, "Unexpected end of contents."); /* undo ASN1's split of tag & class */ for (tmptag = tag; tmptag > 0x0FF; tmptag >>= 8) { cla <<= 8; } tag |= cla; if (tag == 0x0081) { /* set the output data */ if (key_info->modulus) { memcpy(key_info->modulus, part, len); } /* always set output for modulus_len */ key_info->modulus_len = len*8; /* remember the modulus to calculate fingerprint later */ modulus = part; } else if (tag == 0x0082) { /* set the output data */ if (key_info->exponent) { memcpy(key_info->exponent, part, len); } /* always set output for exponent_len */ key_info->exponent_len = len*8; /* remember the exponent to calculate fingerprint later */ exponent = part; } /* go to next part to parse */ /* This will be different from pgp_enumerate_blob() a bit */ in = part + ((tag != 0x7F49) ? len : 0); } /* calculate and store fingerprint */ sc_log(card->ctx, "Calculate and store fingerprint"); r = pgp_calculate_and_store_fingerprint(card, ctime, modulus, exponent, key_info); LOG_TEST_RET(card->ctx, r, "Cannot store fingerprint."); /* update pubkey blobs (B601,B801, A401) */ sc_log(card->ctx, "Update blobs holding pubkey info."); r = pgp_update_pubkey_blob(card, modulus, key_info->modulus_len, exponent, key_info->exponent_len, key_info->keytype); LOG_FUNC_RETURN(card->ctx, r); } /** * Internal: update card->algorithms */ static int pgp_update_card_algorithms(sc_card_t *card, sc_cardctl_openpgp_keygen_info_t *key_info) { sc_algorithm_info_t *algo; u8 id = key_info->keytype; LOG_FUNC_CALLED(card->ctx); if (id > card->algorithm_count) { sc_log(card->ctx, "This key ID %u is out of the card's algorithm list.", (unsigned int)id); LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS); } /* get the algorithm corresponding to the key ID */ algo = card->algorithms + (id - 1); /* update new key length attribute */ algo->key_length = (unsigned int)key_info->modulus_len; LOG_FUNC_RETURN(card->ctx, SC_SUCCESS); } /** * ABI (card ctl): GENERATE ASYMMETRIC KEY PAIR * Set key_info->modulus_len to zero if want to use old key size. * Similarly for exponent length. * key_info->modulus_len and key_info->exponent_len will be returned with new values. **/ static int pgp_gen_key(sc_card_t *card, sc_cardctl_openpgp_keygen_info_t *key_info) { sc_apdu_t apdu; /* temporary variables to hold APDU params */ u8 apdu_case; u8 *apdu_data; size_t apdu_le; size_t resplen = 0; int r = SC_SUCCESS; LOG_FUNC_CALLED(card->ctx); /* FIXME the compilers don't assure that the buffers set here as * apdu_data are present until the end of the function */ /* set Control Reference Template for key */ if (key_info->keytype == SC_OPENPGP_KEY_SIGN) apdu_data = (unsigned char *) "\xb6"; /* as a string, apdu_data will end with '\0' (B6 00) */ else if (key_info->keytype == SC_OPENPGP_KEY_ENCR) apdu_data = (unsigned char *) "\xb8"; else if (key_info->keytype == SC_OPENPGP_KEY_AUTH) apdu_data = (unsigned char *) "\xa4"; else { sc_log(card->ctx, "Unknown key type %X.", key_info->keytype); LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS); } if (card->type == SC_CARD_TYPE_OPENPGP_GNUK && key_info->modulus_len != 2048) { sc_log(card->ctx, "Gnuk does not support other key length than 2048."); LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS); } /* set attributes for new-generated key */ r = pgp_update_new_algo_attr(card, key_info); LOG_TEST_RET(card->ctx, r, "Cannot set attributes for new-generated key"); /* Test whether we will need extended APDU. 1900 is an * arbitrary modulus length which for sure fits into a short APDU. * This idea is borrowed from GnuPG code. */ if (card->caps & SC_CARD_CAP_APDU_EXT && key_info->modulus_len > 1900 && card->type != SC_CARD_TYPE_OPENPGP_GNUK) { /* We won't store to apdu variable yet, because it will be reset in * sc_format_apdu() */ apdu_le = card->max_recv_size; apdu_case = SC_APDU_CASE_4_EXT; } else { apdu_case = SC_APDU_CASE_4_SHORT; apdu_le = 256; resplen = MAXLEN_RESP_PUBKEY; } if (card->type == SC_CARD_TYPE_OPENPGP_GNUK) { resplen = MAXLEN_RESP_PUBKEY_GNUK; } /* prepare APDU */ sc_format_apdu(card, &apdu, apdu_case, 0x47, 0x80, 0); apdu.data = apdu_data; apdu.datalen = 2; /* Data = B600 */ apdu.lc = 2; apdu.le = apdu_le; /* buffer to receive response */ apdu.resplen = (resplen > 0) ? resplen : apdu_le; apdu.resp = calloc(apdu.resplen, 1); if (apdu.resp == NULL) { LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_ENOUGH_MEMORY); } /* send */ sc_log(card->ctx, "Waiting for the card to generate key..."); r = sc_transmit_apdu(card, &apdu); sc_log(card->ctx, "Card has done key generation."); if (r < 0) { sc_log(card->ctx, "APDU transmit failed. Error %s.", sc_strerror(r)); goto finish; } /* check response */ r = sc_check_sw(card, apdu.sw1, apdu.sw2); /* instruct more in case of error */ if (r == SC_ERROR_SECURITY_STATUS_NOT_SATISFIED) { sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Please verify PIN first."); goto finish; } /* parse response data and set output */ pgp_parse_and_set_pubkey_output(card, apdu.resp, apdu.resplen, key_info); pgp_update_card_algorithms(card, key_info); finish: free(apdu.resp); LOG_FUNC_RETURN(card->ctx, r); } /** * Internal: build TLV. * * FIXME use `sc_asn1_put_tag` or similar instead * * @param[in] data The data ("value") part to build TLV. * @param[in] len Data length * @param[out] out The buffer of overall TLV. This buffer should be freed later. * @param[out] outlen The length of buffer out. **/ static int pgp_build_tlv(sc_context_t *ctx, unsigned int tag, u8 *data, size_t len, u8 **out, size_t *outlen) { u8 highest_order = 0; int r; r = sc_asn1_write_element(ctx, tag, data, len, out, outlen); LOG_TEST_RET(ctx, r, "Failed to write ASN.1 element"); /* Restore class bits stripped by sc_asn1_write_element */ /* determine the leftmost byte of tag, which contains class bits */ while ((tag >> 8*highest_order) != 0) { highest_order++; } highest_order--; /* restore class bits in output */ if (highest_order < 4) *out[0] |= (tag >> 8*highest_order); return SC_SUCCESS; } /** * Internal: set Tag & Length components for TLV, store them in buffer. * * FIXME use `sc_asn1_put_tag` or similar instead * * Return the total length of Tag + Length. * Note that the Value components is not counted. * Ref: add_tlv() of GnuPG code. **/ static size_t set_taglength_tlv(u8 *buffer, unsigned int tag, size_t length) { u8 *p = buffer; assert(tag <= 0xffff); if (tag > 0xff) *p++ = (tag >> 8) & 0xFF; *p++ = tag; if (length < 128) *p++ = (u8)length; else if (length < 256) { *p++ = 0x81; *p++ = (u8)length; } else { if (length > 0xffff) length = 0xffff; *p++ = 0x82; *p++ = (length >> 8) & 0xFF; *p++ = length & 0xFF; } return p - buffer; } /** * Internal: build Extended Header list (sec 4.3.3.7 - OpenPGP card spec v.2) **/ static int pgp_build_extended_header_list(sc_card_t *card, sc_cardctl_openpgp_keystore_info_t *key_info, u8 **result, size_t *resultlen) { sc_context_t *ctx = card->ctx; /* Cardholder private key template (7F48) part */ const size_t max_prtem_len = 7*(1 + 3); /* 7 components */ /* 1 for tag name (91, 92... 97) * 3 for storing length */ u8 pritemplate[7*(1 + 3)]; size_t tpl_len = 0; /* Actual size of pritemplate */ /* Concatenation of key data */ u8 kdata[3 + 256 + 256 + 512]; /* Exponent is stored in 3 bytes * With maximum 4096-bit key, * p and q can be stored in 256 bytes (2048 bits). * Maximum 4096-bit modulus is stored in 512 bytes */ size_t kdata_len = 0; /* Actual size of kdata */ u8 *tlvblock = NULL; size_t tlvlen = 0; u8 *tlv_5f48 = NULL; size_t tlvlen_5f48 = 0; u8 *tlv_7f48 = NULL; size_t tlvlen_7f48 = 0; u8 *data = NULL; size_t len = 0; u8 *p = NULL; u8 *components[] = {key_info->e, key_info->p, key_info->q, key_info->n}; size_t componentlens[] = {key_info->e_len, key_info->p_len, key_info->q_len, key_info->n_len}; unsigned int componenttags[] = {0x91, 0x92, 0x93, 0x97}; char *componentnames[] = { "public exponent", "prime p", "prime q", "modulus" }; size_t comp_to_add = 3; size_t req_e_len = 0; /* The exponent length specified in Algorithm Attributes */ pgp_blob_t *alat_blob; u8 i; int r; LOG_FUNC_CALLED(ctx); if (key_info->keyformat == SC_OPENPGP_KEYFORMAT_STDN || key_info->keyformat == SC_OPENPGP_KEYFORMAT_CRTN) comp_to_add = 4; /* validate */ if (comp_to_add == 4 && (key_info->n == NULL || key_info->n_len == 0)){ sc_log(ctx, "Error: Modulus required!"); LOG_FUNC_RETURN(ctx, SC_ERROR_INVALID_ARGUMENTS); } /* Cardholder private key template's data part */ memset(pritemplate, 0, max_prtem_len); /* get required exponent length */ alat_blob = pgp_find_blob(card, 0x00C0 | key_info->keytype); if (!alat_blob) { sc_log(ctx, "Cannot read Algorithm Attributes."); LOG_FUNC_RETURN(ctx, SC_ERROR_OBJECT_NOT_FOUND); } req_e_len = bebytes2ushort(alat_blob->data + 3) >> 3; /* 1/8 */ assert(key_info->e_len <= req_e_len); /* We need to right justify the exponent with required length, * e.g. from '01 00 01' to '00 01 00 01' */ if (key_info->e_len < req_e_len) { /* create new buffer */ p = calloc(req_e_len, 1); if (!p) LOG_FUNC_RETURN(ctx, SC_ERROR_NOT_ENOUGH_MEMORY); memcpy(p + req_e_len - key_info->e_len, key_info->e, key_info->e_len); key_info->e_len = req_e_len; /* set key_info->e to new buffer */ free(key_info->e); key_info->e = p; components[0] = p; componentlens[0] = req_e_len; } /* start from beginning of pritemplate */ p = pritemplate; for (i = 0; i < comp_to_add; i++) { sc_log(ctx, "Set Tag+Length for %s (%X).", componentnames[i], componenttags[i]); len = set_taglength_tlv(p, componenttags[i], componentlens[i]); tpl_len += len; /* * <-- kdata_len --><-- Copy here --> * kdata |===============|___________________ */ memcpy(kdata + kdata_len, components[i], componentlens[i]); kdata_len += componentlens[i]; /* Move p to next part and build */ p += len; } /* TODO: Components for CRT format */ /* TLV block for 7F48 */ r = pgp_build_tlv(ctx, 0x7F48, pritemplate, tpl_len, &tlv_7f48, &tlvlen_7f48); LOG_TEST_RET(ctx, r, "Failed to build TLV for 7F48."); tlv_7f48[0] |= 0x7F; r = pgp_build_tlv(ctx, 0x5f48, kdata, kdata_len, &tlv_5f48, &tlvlen_5f48); if (r < 0) { sc_log(ctx, "Failed to build TLV for 5F48."); goto out; } /* data part's length for Extended Header list */ len = 2 + tlvlen_7f48 + tlvlen_5f48; /* set data part content */ data = calloc(len, 1); if (data == NULL) { sc_log(ctx, "Not enough memory."); r = SC_ERROR_NOT_ENOUGH_MEMORY; goto out; } switch (key_info->keytype) { case SC_OPENPGP_KEY_SIGN: data[0] = 0xB6; break; case SC_OPENPGP_KEY_ENCR: data[0] = 0xB8; break; case SC_OPENPGP_KEY_AUTH: data[0] = 0xA4; break; default: sc_log(ctx, "Unknown key type %d.", key_info->keytype); r = SC_ERROR_INVALID_ARGUMENTS; goto out; } memcpy(data + 2, tlv_7f48, tlvlen_7f48); memcpy(data + 2 + tlvlen_7f48, tlv_5f48, tlvlen_5f48); r = pgp_build_tlv(ctx, 0x4D, data, len, &tlvblock, &tlvlen); if (r < 0) { sc_log(ctx, "Cannot build TLV for Extended Header list."); goto out; } /* set output */ if (result != NULL) { *result = tlvblock; *resultlen = tlvlen; } else { free(tlvblock); } out: free(data); free(tlv_5f48); free(tlv_7f48); LOG_FUNC_RETURN(ctx, r); } /** * ABI (card ctl): store key **/ static int pgp_store_key(sc_card_t *card, sc_cardctl_openpgp_keystore_info_t *key_info) { sc_context_t *ctx = card->ctx; sc_cardctl_openpgp_keygen_info_t pubkey; u8 *data = NULL; size_t len = 0; int r; LOG_FUNC_CALLED(ctx); /* Validate */ if (key_info->keytype < 1 || key_info->keytype > 3) { sc_log(ctx, "Unknown key type %d.", key_info->keytype); LOG_FUNC_RETURN(ctx, SC_ERROR_INVALID_ARGUMENTS); } /* we just support standard key format */ switch (key_info->keyformat) { case SC_OPENPGP_KEYFORMAT_STD: case SC_OPENPGP_KEYFORMAT_STDN: break; case SC_OPENPGP_KEYFORMAT_CRT: case SC_OPENPGP_KEYFORMAT_CRTN: LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_SUPPORTED); default: LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS); } /* we only support exponent of maximum 32 bits */ if (key_info->e_len > 4) { sc_log(card->ctx, "Exponent %"SC_FORMAT_LEN_SIZE_T"u-bit (>32) is not supported.", key_info->e_len * 8); LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_SUPPORTED); } /* set algorithm attributes */ memset(&pubkey, 0, sizeof(pubkey)); pubkey.keytype = key_info->keytype; if (key_info->n && key_info->n_len) { pubkey.modulus = key_info->n; pubkey.modulus_len = 8*key_info->n_len; /* We won't update exponent length, because smaller exponent length * will be padded later */ } r = pgp_update_new_algo_attr(card, &pubkey); LOG_TEST_RET(card->ctx, r, "Failed to update new algorithm attributes"); /* build Extended Header list */ r = pgp_build_extended_header_list(card, key_info, &data, &len); if (r < 0) { sc_log(ctx, "Failed to build Extended Header list."); goto out; } /* write to DO */ r = pgp_put_data(card, 0x4D, data, len); if (r < 0) { sc_log(ctx, "Failed to write to DO."); goto out; } free(data); data = NULL; /* store creation time */ r = pgp_store_creationtime(card, key_info->keytype, &key_info->creationtime); LOG_TEST_RET(card->ctx, r, "Cannot store creation time"); /* Calculate and store fingerprint */ sc_log(card->ctx, "Calculate and store fingerprint"); r = pgp_calculate_and_store_fingerprint(card, key_info->creationtime, key_info->n, key_info->e, &pubkey); LOG_TEST_RET(card->ctx, r, "Cannot store fingerprint."); /* update pubkey blobs (B601,B801, A401) */ sc_log(card->ctx, "Update blobs holding pubkey info."); r = pgp_update_pubkey_blob(card, key_info->n, 8*key_info->n_len, key_info->e, 8*key_info->e_len, key_info->keytype); sc_log(ctx, "Update card algorithms."); pgp_update_card_algorithms(card, &pubkey); out: if (data) { free(data); data = NULL; } LOG_FUNC_RETURN(ctx, r); } #endif /* ENABLE_OPENSSL */ /** * ABI (card ctl): erase card **/ static int pgp_erase_card(sc_card_t *card) { /* Special series of commands to erase OpenPGP card, * according to https://www.crypto-stick.com/en/faq * (How to reset a Crypto Stick? question). * Gnuk is known not to support this feature. */ const char *apdu_hex[] = { /* block PIN1 */ "00:20:00:81:08:40:40:40:40:40:40:40:40", "00:20:00:81:08:40:40:40:40:40:40:40:40", "00:20:00:81:08:40:40:40:40:40:40:40:40", "00:20:00:81:08:40:40:40:40:40:40:40:40", /* block PIN3 */ "00:20:00:83:08:40:40:40:40:40:40:40:40", "00:20:00:83:08:40:40:40:40:40:40:40:40", "00:20:00:83:08:40:40:40:40:40:40:40:40", "00:20:00:83:08:40:40:40:40:40:40:40:40", /* TERMINATE */ "00:e6:00:00", NULL }; sc_apdu_t apdu; int i; int r = SC_SUCCESS; struct pgp_priv_data *priv = DRVDATA(card); LOG_FUNC_CALLED(card->ctx); if (priv->bcd_version < OPENPGP_CARD_2_0 || priv->state == CARD_STATE_UNKNOWN) { LOG_TEST_RET(card->ctx, SC_ERROR_NO_CARD_SUPPORT, "Card does not offer life cycle management"); } switch (priv->state) { case CARD_STATE_ACTIVATED: /* iterate over the commands above */ for (i = 0; apdu_hex[i] != NULL; i++) { u8 apdu_bin[25]; /* large enough to convert apdu_hex */ size_t apdu_bin_len = sizeof(apdu_bin); u8 rbuf[SC_MAX_APDU_BUFFER_SIZE]; /* convert hex array to bin array */ r = sc_hex_to_bin(apdu_hex[i], apdu_bin, &apdu_bin_len); LOG_TEST_RET(card->ctx, r, "Failed to convert APDU bytes"); /* build APDU from binary array */ r = sc_bytes2apdu(card->ctx, apdu_bin, apdu_bin_len, &apdu); if (r) { sc_log(card->ctx, "Failed to build APDU"); LOG_FUNC_RETURN(card->ctx, SC_ERROR_INTERNAL); } apdu.resp = rbuf; apdu.resplen = sizeof(rbuf); /* send APDU to card */ sc_log(card->ctx, "Sending APDU%d %s", i, apdu_hex[i]); r = sc_transmit_apdu(card, &apdu); LOG_TEST_RET(card->ctx, r, "Transmitting APDU failed"); } /* fall through */ case CARD_STATE_INITIALIZATION: sc_format_apdu(card, &apdu, SC_APDU_CASE_1, 0x44, 0, 0); r = sc_transmit_apdu(card, &apdu); LOG_TEST_RET(card->ctx, r, "Transmitting APDU failed"); break; default: LOG_TEST_RET(card->ctx, SC_ERROR_NO_CARD_SUPPORT, "Card does not offer life cycle management"); } LOG_FUNC_RETURN(card->ctx, r); } /** * ABI: card ctl: perform special card-specific operations. */ static int pgp_card_ctl(sc_card_t *card, unsigned long cmd, void *ptr) { int r; LOG_FUNC_CALLED(card->ctx); switch(cmd) { case SC_CARDCTL_GET_SERIALNR: memmove((sc_serial_number_t *) ptr, &card->serialnr, sizeof(card->serialnr)); LOG_FUNC_RETURN(card->ctx, SC_SUCCESS); break; #ifdef ENABLE_OPENSSL case SC_CARDCTL_OPENPGP_GENERATE_KEY: r = pgp_gen_key(card, (sc_cardctl_openpgp_keygen_info_t *) ptr); LOG_FUNC_RETURN(card->ctx, r); break; case SC_CARDCTL_OPENPGP_STORE_KEY: r = pgp_store_key(card, (sc_cardctl_openpgp_keystore_info_t *) ptr); LOG_FUNC_RETURN(card->ctx, r); break; #endif /* ENABLE_OPENSSL */ case SC_CARDCTL_ERASE_CARD: r = pgp_erase_card(card); LOG_FUNC_RETURN(card->ctx, r); break; } LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_SUPPORTED); } /** * Internal: delete key. */ static int gnuk_delete_key(sc_card_t *card, u8 key_id) { sc_context_t *ctx = card->ctx; int r = SC_SUCCESS; char *data = NULL; LOG_FUNC_CALLED(ctx); if (key_id < 1 || key_id > 3) { sc_log(ctx, "Key ID %d is invalid. Should be 1, 2 or 3.", key_id); LOG_FUNC_RETURN(ctx, SC_ERROR_INVALID_ARGUMENTS); } /* delete fingerprint */ sc_log(ctx, "Delete fingerprints"); r = pgp_put_data(card, 0xC6 + key_id, NULL, 0); LOG_TEST_RET(ctx, r, "Failed to delete fingerprints"); /* delete creation time */ sc_log(ctx, "Delete creation time"); r = pgp_put_data(card, 0xCD + key_id, NULL, 0); LOG_TEST_RET(ctx, r, "Failed to delete creation time"); /* rewrite Extended Header List */ sc_log(ctx, "Rewrite Extended Header List"); if (key_id == 1) data = "\x4D\x02\xB6"; else if (key_id == 2) data = "\x4D\x02\xB8"; else if (key_id == 3) data = "\x4D\x02\xA4"; r = pgp_put_data(card, 0x4D, (const u8 *)data, strlen((const char *)data) + 1); LOG_FUNC_RETURN(ctx, r); } /** * ABI: DELETE FILE. */ static int pgp_delete_file(sc_card_t *card, const sc_path_t *path) { struct pgp_priv_data *priv = DRVDATA(card); pgp_blob_t *blob; sc_file_t *file; int r; LOG_FUNC_CALLED(card->ctx); /* sc_pkcs15init_delete_by_path() sets the path type to SC_PATH_TYPE_FILE_ID */ r = pgp_select_file(card, path, &file); LOG_TEST_RET(card->ctx, r, "Cannot select file."); /* save "current" blob */ blob = priv->current; /* do try to delete MF */ if (blob == priv->mf) LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_SUPPORTED); if (card->type != SC_CARD_TYPE_OPENPGP_GNUK && (file->id == DO_SIGN_SYM || file->id == DO_ENCR_SYM || file->id == DO_AUTH_SYM)) { /* These tags are just symbolic. We don't really delete them. */ r = SC_SUCCESS; } else if (card->type == SC_CARD_TYPE_OPENPGP_GNUK && file->id == DO_SIGN_SYM) { r = gnuk_delete_key(card, 1); } else if (card->type == SC_CARD_TYPE_OPENPGP_GNUK && file->id == DO_ENCR_SYM) { r = gnuk_delete_key(card, 2); } else if (card->type == SC_CARD_TYPE_OPENPGP_GNUK && file->id == DO_AUTH_SYM) { r = gnuk_delete_key(card, 3); } else { /* call pgp_put_data() with zero-sized NULL-buffer to zap the DO contents */ r = pgp_put_data(card, file->id, NULL, 0); } /* set "current" blob to parent */ priv->current = blob->parent; LOG_FUNC_RETURN(card->ctx, r); } /** * ABI: UPDATE BINARY. */ static int pgp_update_binary(sc_card_t *card, unsigned int idx, const u8 *buf, size_t count, unsigned long flags) { struct pgp_priv_data *priv = DRVDATA(card); pgp_blob_t *blob = priv->current; int r = SC_SUCCESS; LOG_FUNC_CALLED(card->ctx); /* We will use PUT DATA to write to DO. * As PUT DATA does not support idx, we don't either */ if (idx > 0) LOG_FUNC_RETURN(card->ctx, SC_ERROR_INCORRECT_PARAMETERS); /* When a dummy file, e.g "11001101", is selected, the current blob * is set to NULL. We don't really put data to dummy file. */ if (blob != NULL) { r = pgp_put_data(card, blob->id, buf, count); } LOG_FUNC_RETURN(card->ctx, r); } static int pgp_card_reader_lock_obtained(sc_card_t *card, int was_reset) { struct pgp_priv_data *priv = DRVDATA(card); /* may be null during initialization */ int r = SC_SUCCESS; SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE); if (card->flags & SC_CARD_FLAG_KEEP_ALIVE && was_reset <= 0 && priv != NULL && priv->mf && priv->mf->file) { /* check whether applet is still selected */ unsigned char aid[16]; r = sc_get_data(card, 0x004F, aid, sizeof aid); if ((size_t) r != priv->mf->file->namelen || 0 != memcmp(aid, priv->mf->file->name, r)) { /* reselect is required */ was_reset = 1; } r = SC_SUCCESS; } if (was_reset > 0) { sc_file_t *file = NULL; sc_path_t path; /* select application "OpenPGP" */ sc_format_path("D276:0001:2401", &path); path.type = SC_PATH_TYPE_DF_NAME; r = iso_ops->select_file(card, &path, &file); sc_file_free(file); } LOG_FUNC_RETURN(card->ctx, r); } struct sc_card_driver * sc_get_openpgp_driver(void) { struct sc_card_driver *iso_drv = sc_get_iso7816_driver(); iso_ops = iso_drv->ops; pgp_ops = *iso_ops; pgp_ops.match_card = pgp_match_card; pgp_ops.init = pgp_init; pgp_ops.finish = pgp_finish; pgp_ops.select_file = pgp_select_file; pgp_ops.list_files = pgp_list_files; pgp_ops.get_challenge = pgp_get_challenge; pgp_ops.read_binary = pgp_read_binary; pgp_ops.write_binary = pgp_write_binary; pgp_ops.pin_cmd = pgp_pin_cmd; pgp_ops.logout = pgp_logout; pgp_ops.get_data = pgp_get_data; pgp_ops.put_data = pgp_put_data; pgp_ops.set_security_env= pgp_set_security_env; pgp_ops.compute_signature= pgp_compute_signature; pgp_ops.decipher = pgp_decipher; pgp_ops.card_ctl = pgp_card_ctl; pgp_ops.delete_file = pgp_delete_file; pgp_ops.update_binary = pgp_update_binary; pgp_ops.card_reader_lock_obtained = pgp_card_reader_lock_obtained; return &pgp_drv; }