/* * 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 */ #include "config.h" #include #include #include #include "internal.h" #include "asn1.h" #include "cardctl.h" #include "errors.h" 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 }, { 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 }; 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 }; struct blob { struct blob * next; /* pointer to next sibling */ struct 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 blob * files; /* pointer to 1st child */ }; struct do_info { unsigned int id; /* ID of the DO in question */ enum _type type; /* constructed DO or not */ enum _access access; /* R/W acces 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(struct blob *, int, void (*func)()); static int pgp_get_blob(sc_card_t *card, struct blob *blob, unsigned int id, struct blob **ret); static struct blob * pgp_new_blob(sc_card_t *, struct blob *, unsigned int, sc_file_t *); static void pgp_free_blob(struct blob *); 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); 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 }, { 0xa400, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey, NULL }, { 0xa401, SIMPLE, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey_pem, NULL }, { 0xb600, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey, NULL }, { 0xb601, SIMPLE, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey_pem, NULL }, { 0xb800, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey, NULL }, { 0xb801, SIMPLE, READ_ALWAYS | WRITE_NEVER, 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). */ { 0x7f21, 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 }, { 0xa400, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey, NULL }, { 0xa401, SIMPLE, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey_pem, NULL }, { 0xb600, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey, NULL }, { 0xb601, SIMPLE, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey_pem, NULL }, { 0xb800, CONSTRUCTED, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey, NULL }, { 0xb801, SIMPLE, READ_ALWAYS | WRITE_NEVER, pgp_get_pubkey_pem, NULL }, { 0, 0, 0, NULL, NULL }, }; /* The DO holding X.509 certificate is constructed but does not contain child DO. * We should notice this when building fake file system later. */ #define DO_CERT 0x7f21 #define DRVDATA(card) ((struct pgp_priv_data *) ((card)->drv_data)) struct pgp_priv_data { struct blob * mf; struct blob * 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; }; /* ABI: check if card's ATR matches one of driver's */ 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; return 1; } return 0; } /* ABI: initialize driver */ static int pgp_init(sc_card_t *card) { struct pgp_priv_data *priv; sc_path_t aid; sc_file_t *file = NULL; struct do_info *info; int r; struct blob *child = NULL; priv = calloc (1, sizeof *priv); if (!priv) return SC_ERROR_OUT_OF_MEMORY; card->drv_data = priv; card->cla = 0x00; /* set pointer to correct list of card objects */ priv->pgp_objects = (card->type == SC_CARD_TYPE_OPENPGP_V2) ? pgp2_objects : pgp1_objects; /* set detailed card version */ priv->bcd_version = (card->type == SC_CARD_TYPE_OPENPGP_V2) ? OPENPGP_CARD_2_0 : OPENPGP_CARD_1_1; /* select application "OpenPGP" */ sc_format_path("D276:0001:2401", &aid); aid.type = SC_PATH_TYPE_DF_NAME; if ((r = iso_ops->select_file(card, &aid, &file)) < 0) { pgp_finish(card); return r; } /* read information from AID */ if (file && 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); /* kludge: get card's serial number from manufacturer ID + serial number */ memcpy(card->serialnr.value, file->name + 8, 6); card->serialnr.len = 6; } /* 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); return 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_ALWAYS) && (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); return SC_ERROR_OUT_OF_MEMORY; } } } /* get card_features from ATR & DOs */ pgp_get_card_features(card); return SC_SUCCESS; } /* internal: get features of the card: capabilitis, ... */ 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 = 0; struct blob *blob, *blob6e, *blob73; /* parse card capabilities from historical bytes */ while ((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)) { while ((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 (hist_bytes[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 ((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) && (card->type == SC_CARD_TYPE_OPENPGP_V2)) 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) && (card->type == SC_CARD_TYPE_OPENPGP_V2)) 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); /* 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); } } /* 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 2.1 */ flags = SC_ALGORITHM_RSA_RAW; /* 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; 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); _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(struct blob *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 = 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) { sc_acl_entry_t *acl; unsigned int method = SC_AC_NONE; unsigned long key_ref = 0; /* 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 != 0) { 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); } method = SC_AC_NONE; key_ref = 0; /* 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 != 0) { 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 struct blob * pgp_new_blob(sc_card_t *card, struct blob *parent, unsigned int file_id, sc_file_t *file) { struct blob *blob = NULL; if (file == NULL) return NULL; if ((blob = calloc(1, sizeof(struct blob))) != 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) { struct blob **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 */ sc_format_path(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(struct blob *blob) { if (blob) { if (blob->parent) { struct blob **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; } if (blob->file) 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(struct blob *blob, int level, void (*func)()) { if (blob) { if (level > 0) { struct blob *child = blob->files; while (child != NULL) { struct blob *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, struct blob *blob) { 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 = (card->caps & SC_CARD_CAP_APDU_EXT) ? sizeof(buffer) : 256; int 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, struct blob *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; struct blob *new; r = sc_asn1_read_tag(&data, blob->len - (in - blob->data), &cla, &tag, &len); if (r < 0) { 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; /* 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, struct blob *blob, unsigned int id, struct blob **ret) { struct blob *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; } } 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, struct blob *root, unsigned int id, struct blob **ret) { struct blob *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->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 struct blob * pgp_find_blob(sc_card_t *card, unsigned int tag) { struct pgp_priv_data *priv = DRVDATA(card); struct blob *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; } /** * 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->value == NULL || 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-AppDF (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); struct blob *blob; unsigned int path_start = 0; unsigned int n; 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"); /* ignore explicitely 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); if (r < 0) { /* failure */ priv->current = NULL; 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); struct blob *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); } /* 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); struct blob *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, 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 idbuf[2]; int r; sc_log(card->ctx, "called, tag=%04x\n", tag); sc_format_apdu(card, &apdu, SC_APDU_CASE_4, 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, 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); struct blob *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, 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); LOG_TEST_RET(card->ctx, r, "Card returned error"); LOG_FUNC_RETURN(card->ctx, apdu.resplen); } /* ABI: PUT DATA */ static int pgp_put_data(sc_card_t *card, unsigned int tag, const u8 *buf, size_t buf_len) { sc_apdu_t apdu; struct pgp_priv_data *priv = DRVDATA(card); struct blob *affected_blob = NULL; u8 ins = 0xDA; u8 p1 = tag >> 8; u8 p2 = tag & 0xFF; int r; LOG_FUNC_CALLED(card->ctx); /* Check if the tag is writable */ affected_blob = pgp_find_blob(card, tag); if (affected_blob == NULL || (affected_blob->info->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-codded and may change in various version of the card. If we check here, * the driver may be sticked 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 %ld exceeds DO size limit %ld.", buf_len, priv->max_cert_size); LOG_FUNC_RETURN(card->ctx, SC_ERROR_WRONG_LENGTH); } /* 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, SC_APDU_CASE_3, 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 = buf; apdu.datalen = buf_len; apdu.lc = buf_len; } else { 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); /* 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"); /* 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, 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) { 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 ver 1, the PINs are named CHV1, CHV2, CHV3. In ver 2, they * are named PW1, PW3 (PW1 operates in 2 modes). However, the PIN references (P2 in APDU) * are the same between 2 version: * 81 (CHV1 or PW1), 82 (CHV2 or PW1-mode 2), 83 (CHV3 or PW3). * * 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; /* 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)); } /* 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"); switch (env->operation) { case SC_SEC_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: if (env->key_ref[0] != 0x01) { 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; 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, SC_APDU_CASE_4, 0x2A, 0x9E, 0x9A); break; case 0x02: /* authentication key */ /* INTERNAL AUTHENTICATE */ sc_format_apdu(card, &apdu, SC_APDU_CASE_4, 0x88, 0, 0); break; case 0x01: default: LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS, "invalid key reference"); } apdu.lc = data_len; apdu.data = 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, 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 *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 */ /* PSO DECIPHER */ sc_format_apdu(card, &apdu, SC_APDU_CASE_4, 0x2A, 0x80, 0x86); break; case 0x00: /* signature key */ case 0x02: /* authentication key */ default: free(temp); LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS, "invalid key reference"); } apdu.lc = inlen; apdu.data = 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, apdu.resplen); } /** * Internal: Parse response data of key generation and update blob. **/ static int pgp_parse_and_update_pubkey_info(sc_card_t *card, u8* data, size_t data_len, sc_cardctl_openpgp_keygen_info_t *key_info) { struct pgp_priv_data *priv = DRVDATA(card); struct blob *kinfo_blob; struct blob *modulus_blob; struct blob *exponent_blob; u8 *in = data; int r; LOG_FUNC_CALLED(card->ctx); while (data_len > (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); 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 == 0x7f49) { r = pgp_get_blob(card, priv->mf, tag, &kinfo_blob); LOG_TEST_RET(card->ctx, r, "Can not get the blob storing pubkey info."); } else if (tag == 0x0081) { /* Set the output data */ if (key_info->modulus) { memcpy(key_info->modulus, part, len); key_info->modulus_len = len; } /* Update the corresponding blob content */ r = pgp_get_blob(card, kinfo_blob, tag, &modulus_blob); LOG_TEST_RET(card->ctx, r, "Can not get the blob storing modulus info."); pgp_set_blob(modulus_blob, part, len); } else if (tag == 0x0082) { /* Set the output data */ if (key_info->exponent) { memcpy(key_info->exponent, part, len); key_info->exponent_len = len; } /* Update the corresponding blob content */ r = pgp_get_blob(card, kinfo_blob, tag, &exponent_blob); LOG_TEST_RET(card->ctx, r, "Can not get the blob storing exponent info."); pgp_set_blob(exponent_blob, part, len); } /* Go to next part to parse */ in = part + len; } LOG_FUNC_RETURN(card->ctx, r); } /** * Generate key **/ static int pgp_gen_key(sc_card_t *card, sc_cardctl_openpgp_keygen_info_t *key_info) { struct pgp_priv_data *priv = DRVDATA(card); struct blob *algo_blob; sc_apdu_t apdu; unsigned int modulus_bitlen; /* Temporary variables to hold APDU params */ u8 apdu_case; u8 *apdu_data; size_t apdu_le; int r = SC_SUCCESS; LOG_FUNC_CALLED(card->ctx); /* Set Control Reference Template for key */ if (key_info->keytype == SC_OPENPGP_KEY_SIGN) apdu_data = "\xb6"; /* As a string, apdu_data will end with '\0' (B6 00) */ else if (key_info->keytype == SC_OPENPGP_KEY_ENCR) apdu_data = "\xb8"; else if (key_info->keytype == SC_OPENPGP_KEY_AUTH) apdu_data = "\xa4"; else { sc_log(card->ctx, "Unknown key type %X.", key_info->keytype); LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS); } /* Get supported modulus length, to specify Le for APDU */ r = pgp_get_blob(card, priv->mf, (0x00C0 | key_info->keytype), &algo_blob); LOG_TEST_RET(card->ctx, r, "Don't know supported modulus length"); modulus_bitlen = bebytes2ushort(algo_blob->data + 1); /* The modulus length is coded in byte 2 & 3 */ /* 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) { /* 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_le = 256; apdu_case = SC_APDU_CASE_4_SHORT; } /* 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.resp = calloc(apdu.le, 1); if (apdu.resp == NULL) { LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_ENOUGH_MEMORY); } apdu.resplen = apdu.le; /* 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 the returned data (pubkey info) and update blob */ r = pgp_parse_and_update_pubkey_info(card, apdu.resp, apdu.resplen, key_info); finish: free(apdu.resp); 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; case SC_CARDCTL_OPENPGP_GENERATE_KEY: r = pgp_gen_key(card, (sc_cardctl_openpgp_keygen_info_t *) ptr); LOG_FUNC_RETURN(card->ctx, r); } LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_SUPPORTED); } /* ABI: DELETE FILE */ static int pgp_delete_file(sc_card_t *card, const sc_path_t *path) { struct pgp_priv_data *priv = DRVDATA(card); struct blob *blob; sc_file_t *file; int r; LOG_FUNC_CALLED(card->ctx); /* In sc_pkcs15init_delete_by_path(), the path type was set 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); /* 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); struct blob *blob = priv->current; int r; 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); r = pgp_put_data(card, blob->id, buf, count); LOG_FUNC_RETURN(card->ctx, r); } /* ABI: driver binding stuff */ static struct sc_card_driver * sc_get_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.read_binary = pgp_read_binary; pgp_ops.write_binary = pgp_write_binary; pgp_ops.pin_cmd = pgp_pin_cmd; 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; return &pgp_drv; } struct sc_card_driver * sc_get_openpgp_driver(void) { return sc_get_driver(); }