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opensc/src/libopensc/card-openpgp.c

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/*
* card-openpgp.c: Support for OpenPGP card
*
* Copyright (C) 2003 Olaf Kirch <okir@suse.de>
*
* 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-1.1.pdf
* http://www.g10code.de/docs/openpgp-card-2.0.pdf
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#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
};
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_PIN3, sc_get_data, sc_put_data },
{ 0x0102, SIMPLE, READ_ALWAYS | WRITE_PIN3, sc_get_data, sc_put_data },
{ 0x0103, SIMPLE, READ_PIN1 | WRITE_PIN1, 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_PIN3, sc_get_data, sc_put_data },
{ 0x0102, SIMPLE, READ_ALWAYS | WRITE_PIN3, sc_get_data, sc_put_data },
{ 0x0103, SIMPLE, READ_PIN1 | WRITE_PIN1, 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 },
{ 0x7f21, CONSTRUCTED, 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 },
};
#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;
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;
/* get SC_CARD_CAP_APDU_EXT capability */
while ((i < atr_len) && (hist_bytes[i] != 0x73))
i++;
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;
}
else 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++;
/* bit 0x40 in byte 3 of TL 0x73 means "extended Le/Lc" */
if ((blob->data[i] == 0x73) && (blob->len > i+3) &&
(blob->data[i+3] & 0x40))
card->caps |= SC_CARD_CAP_APDU_EXT;
}
}
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)) {
/* bit 0x40 if first byte means "support for get challenge" */
if (blob->data[0] & 0x40)
card->caps |= SC_CARD_CAP_RNG;
if ((priv->bcd_version >= OPENPGP_CARD_2_0) && (blob->len >= 10)) {
/* 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 = malloc(len);
if (tmp == NULL)
return SC_ERROR_OUT_OF_MEMORY;
blob->data = tmp;
blob->len = len;
memcpy(blob->data, data, len);
}
if (blob->file)
blob->file->size = len;
return SC_SUCCESS;
}
/* 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;
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 constrcuted 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;
}
/* 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;
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->type != SC_PATH_TYPE_PATH)
LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS,
"invalid path type");
if (path->len < 2 || (path->len & 1))
LOG_TEST_RET(card->ctx, SC_ERROR_INVALID_ARGUMENTS,
"invalid path length");
/* ignore explicitely mentioned MF at the path's beginning */
path_start = (memcmp(path->value, "\x3f\x00", 2) == 0) ? 2 : 0;
/* 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)
{
LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_SUPPORTED);
}
/* 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");
data->pin_reference |= 0x80;
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);
}
/* ABI: card ctl: perform special card-specific operations */
static int pgp_card_ctl(sc_card_t *card, unsigned long cmd, void *ptr)
{
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;
}
LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_SUPPORTED);
}
/* 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;
return &pgp_drv;
}
struct sc_card_driver *
sc_get_openpgp_driver(void)
{
return sc_get_driver();
}
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