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opensc/src/libopensc/card-piv.c

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/*
* card-piv.c: Support for PIV-II from NIST SP800-73
* card-default.c: Support for cards with no driver
*
* Copyright (C) 2001, 2002 Juha Yrjölä <juha.yrjola@iki.fi>
* Copyright (C) 2005,2006,2007,2008,2009,2010 Douglas E. Engert <deengert@anl.gov>
* Copyright (C) 2006, Identity Alliance, Thomas Harning <thomas.harning@identityalliance.com>
* Copyright (C) 2007, EMC, Russell Larner <rlarner@rsa.com>
*
* 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
*/
#include "config.h"
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <limits.h>
#ifdef ENABLE_OPENSSL
/* openssl only needed for card administration */
#include <openssl/evp.h>
#include <openssl/bio.h>
#include <openssl/pem.h>
#include <openssl/rsa.h>
#endif /* ENABLE_OPENSSL */
#include "internal.h"
#include "asn1.h"
#include "cardctl.h"
#ifdef ENABLE_ZLIB
#include "compression.h"
#endif
enum {
PIV_OBJ_CCC = 0,
PIV_OBJ_CHUI,
/* PIV_OBJ_UCHUI is not in new with 800-73-2 */
PIV_OBJ_X509_PIV_AUTH,
PIV_OBJ_CHF,
PIV_OBJ_PI,
PIV_OBJ_CHFI,
PIV_OBJ_X509_DS,
PIV_OBJ_X509_KM,
PIV_OBJ_X509_CARD_AUTH,
PIV_OBJ_SEC_OBJ,
PIV_OBJ_DISCOVERY,
PIV_OBJ_HISTORY,
PIV_OBJ_RETIRED_X509_1,
PIV_OBJ_RETIRED_X509_2,
PIV_OBJ_RETIRED_X509_3,
PIV_OBJ_RETIRED_X509_4,
PIV_OBJ_RETIRED_X509_5,
PIV_OBJ_RETIRED_X509_6,
PIV_OBJ_RETIRED_X509_7,
PIV_OBJ_RETIRED_X509_8,
PIV_OBJ_RETIRED_X509_9,
PIV_OBJ_RETIRED_X509_10,
PIV_OBJ_RETIRED_X509_11,
PIV_OBJ_RETIRED_X509_12,
PIV_OBJ_RETIRED_X509_13,
PIV_OBJ_RETIRED_X509_14,
PIV_OBJ_RETIRED_X509_15,
PIV_OBJ_RETIRED_X509_16,
PIV_OBJ_RETIRED_X509_17,
PIV_OBJ_RETIRED_X509_18,
PIV_OBJ_RETIRED_X509_19,
PIV_OBJ_RETIRED_X509_20,
PIV_OBJ_IRIS_IMAGE,
PIV_OBJ_9B03,
PIV_OBJ_9A06,
PIV_OBJ_9C06,
PIV_OBJ_9D06,
PIV_OBJ_9E06,
PIV_OBJ_8206,
PIV_OBJ_8306,
PIV_OBJ_8406,
PIV_OBJ_8506,
PIV_OBJ_8606,
PIV_OBJ_8706,
PIV_OBJ_8806,
PIV_OBJ_8906,
PIV_OBJ_8A06,
PIV_OBJ_8B06,
PIV_OBJ_8C06,
PIV_OBJ_8D06,
PIV_OBJ_8E06,
PIV_OBJ_8F06,
PIV_OBJ_9006,
PIV_OBJ_9106,
PIV_OBJ_9206,
PIV_OBJ_9306,
PIV_OBJ_9406,
PIV_OBJ_9506,
PIV_OBJ_LAST_ENUM
};
/*
* Flags in the piv_obj_cache:
* PIV_OBJ_CACHE_VALID means the data in the cache can be used.
* It might have zero length indicating that the object was not found.
* PIV_OBJ_CACHE_NOT_PRESENT means do not even try to read the object.
* These objects will only be present if the history object says
* they are on the card, or the discovery or history object in not present.
* If the file lilsted in the history object offCardCertURL was found,
* its certs will be read into the cache and PIV_OBJ_CACHE_VALID set
* and PIV_OBJ_CACHE_NOT_PRESENT unset.
*/
#define PIV_OBJ_CACHE_VALID 1
#define PIV_OBJ_CACHE_NOT_PRESENT 8
typedef struct piv_obj_cache {
u8* obj_data;
size_t obj_len;
u8* internal_obj_data; /* like a cert in the object */
size_t internal_obj_len;
int flags;
} piv_obj_cache_t;
typedef struct piv_private_data {
sc_file_t *aid_file;
int enumtag;
int selected_obj; /* The index into the piv_objects last selected */
int return_only_cert; /* return the cert from the object */
int rwb_state; /* first time -1, 0, in middle, 1 at eof */
int operation; /* saved from set_security_env */
int algorithm; /* saved from set_security_env */
int key_ref; /* saved from set_security_env and */
int alg_id; /* used in decrypt, signature, derive */
int key_size; /* RSA: modulus_bits EC: field_length in bits */
u8* w_buf; /* write_binary buffer */
size_t w_buf_len; /* length of w_buff */
piv_obj_cache_t obj_cache[PIV_OBJ_LAST_ENUM];
int keysWithOnCardCerts;
int keysWithOffCardCerts;
char * offCardCertURL;
int pin_preference; /* set from Discovery object */
} piv_private_data_t;
#define PIV_DATA(card) ((piv_private_data_t*)card->drv_data)
struct piv_aid {
int enumtag;
size_t len_short; /* min lenght without version */
size_t len_long; /* With version and other stuff */
u8 *value;
};
/*
* The Generic entry should be the "A0 00 00 03 08 00 00 01 00 "
* NIST published this on 10/6/2005
* 800-73-2 Part 1 now refers to version "02 00"
* i.e. "A0 00 00 03 08 00 00 01 00 02 00".
* but we don't need the version number. but could get it from the PIX.
*
* 800-73-3 Part 1 now referes to "01 00" i.e. going back to 800-73-1.
* The main differences between 73-1, and 73-3 are the addition of the
* key History object and keys, as well as Discovery and Iris objects.
*/
static struct piv_aid piv_aids[] = {
{SC_CARD_TYPE_PIV_II_GENERIC,
9, 9, (u8 *) "\xA0\x00\x00\x03\x08\x00\x00\x10\x00" },
{0, 9, 0, NULL }
};
/* The EC curves supported by PIV */
#if 0
static u8 oid_prime256v1[] = {"\x06\x08\x2a\x86\x48\xce\x3d\x03\x01\x07"};
static u8 oid_secp384r1[] = {"\x06\x05\x2b\x81\x04\x00\x22"};
#endif
/*
* Flags in the piv_object:
* PIV_OBJECT_NOT_PRESENT: the presents of the object is
* indicated by the History object.
*/
#define PIV_OBJECT_TYPE_CERT 1
#define PIV_OBJECT_TYPE_PUBKEY 2
#define PIV_OBJECT_NOT_PRESENT 4
struct piv_object {
int enumtag;
const char * name;
const char * oidstring;
size_t tag_len;
u8 tag_value[3];
u8 containerid[2]; /* will use as relative paths for simulation */
int flags; /* object has some internal object like a cert */
};
/* Must be in order, and one per enumerated PIV_OBJ */
static const struct piv_object piv_objects[] = {
{ PIV_OBJ_CCC, "Card Capability Container",
"2.16.840.1.101.3.7.1.219.0", 3, "\x5F\xC1\x07", "\xDB\x00", 0},
{ PIV_OBJ_CHUI, "Card Holder Unique Identifier",
"2.16.840.1.101.3.7.2.48.0", 3, "\x5F\xC1\x02", "\x30\x00", 0},
{ PIV_OBJ_X509_PIV_AUTH, "X.509 Certificate for PIV Authentication",
"2.16.840.1.101.3.7.2.1.1", 3, "\x5F\xC1\x05", "\x01\x01", PIV_OBJECT_TYPE_CERT} ,
{ PIV_OBJ_CHF, "Card Holder Fingerprints",
"2.16.840.1.101.3.7.2.96.16", 3, "\x5F\xC1\x03", "\x60\x10", 0},
{ PIV_OBJ_PI, "Printed Information",
"2.16.840.1.101.3.7.2.48.1", 3, "\x5F\xC1\x09", "\x30\x01", 0},
{ PIV_OBJ_CHFI, "Cardholder Facial Images",
"2.16.840.1.101.3.7.2.96.48", 3, "\x5F\xC1\x08", "\x60\x30", 0},
{ PIV_OBJ_X509_DS, "X.509 Certificate for Digital Signature",
"2.16.840.1.101.3.7.2.1.0", 3, "\x5F\xC1\x0A", "\x01\x00", PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_X509_KM, "X.509 Certificate for Key Management",
"2.16.840.1.101.3.7.2.1.2", 3, "\x5F\xC1\x0B", "\x01\x02", PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_X509_CARD_AUTH, "X.509 Certificate for Card Authentication",
"2.16.840.1.101.3.7.2.5.0", 3, "\x5F\xC1\x01", "\x05\x00", PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_SEC_OBJ, "Security Object",
"2.16.840.1.101.3.7.2.144.0", 3, "\x5F\xC1\x06", "\x90\x00", 0},
{ PIV_OBJ_DISCOVERY, "Discovery Object",
"2.16.840.1.101.3.7.2.96.80", 1, "\x7E", "\x60\x50", 0},
{ PIV_OBJ_HISTORY, "Key History Object",
"2.16.840.1.101.3.7.2.96.96", 3, "\x5F\xC1\x0C", "\x60\x60", 0},
/* 800-73-3, 21 new objects, 20 history certificates */
{ PIV_OBJ_RETIRED_X509_1, "Retired X.509 Certificate for Key Management 1",
"2.16.840.1.101.3.7.2.16.1", 3, "\x5F\xC1\x0D", "\x10\x01",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_2, "Retired X.509 Certificate for Key Management 2",
"2.16.840.1.101.3.7.2.16.2", 3, "\x5F\xC1\x0E", "\x10\x02",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_3, "Retired X.509 Certificate for Key Management 3",
"2.16.840.1.101.3.7.2.16.3", 3, "\x5F\xC1\x0F", "\x10\x03",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_4, "Retired X.509 Certificate for Key Management 4",
"2.16.840.1.101.3.7.2.16.4", 3, "\x5F\xC1\x10", "\x10\x04",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_5, "Retired X.509 Certificate for Key Management 5",
"2.16.840.1.101.3.7.2.16.5", 3, "\x5F\xC1\x11", "\x10\x05",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_6, "Retired X.509 Certificate for Key Management 6",
"2.16.840.1.101.3.7.2.16.6", 3, "\x5F\xC1\x12", "\x10\x06",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_7, "Retired X.509 Certificate for Key Management 7",
"2.16.840.1.101.3.7.2.16.7", 3, "\x5F\xC1\x13", "\x10\x07",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_8, "Retired X.509 Certificate for Key Management 8",
"2.16.840.1.101.3.7.2.16.8", 3, "\x5F\xC1\x14", "\x10\x08",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_9, "Retired X.509 Certificate for Key Management 9",
"2.16.840.1.101.3.7.2.16.9", 3, "\x5F\xC1\x15", "\x10\x09",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_10, "Retired X.509 Certificate for Key Management 10",
"2.16.840.1.101.3.7.2.16.10", 3, "\x5F\xC1\x16", "\x10\x0A",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_11, "Retired X.509 Certificate for Key Management 11",
"2.16.840.1.101.3.7.2.16.11", 3, "\x5F\xC1\x17", "\x10\x0B",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_12, "Retired X.509 Certificate for Key Management 12",
"2.16.840.1.101.3.7.2.16.12", 3, "\x5F\xC1\x18", "\x10\x0C",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_13, "Retired X.509 Certificate for Key Management 13",
"2.16.840.1.101.3.7.2.16.13", 3, "\x5F\xC1\x19", "\x10\x0D",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_14, "Retired X.509 Certificate for Key Management 14",
"2.16.840.1.101.3.7.2.16.14", 3, "\x5F\xC1\x1A", "\x10\x0E",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_15, "Retired X.509 Certificate for Key Management 15",
"2.16.840.1.101.3.7.2.16.15", 3, "\x5F\xC1\x1B", "\x10\x0F",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_16, "Retired X.509 Certificate for Key Management 16",
"2.16.840.1.101.3.7.2.16.16", 3, "\x5F\xC1\x1C", "\x10\x10",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_17, "Retired X.509 Certificate for Key Management 17",
"2.16.840.1.101.3.7.2.16.17", 3, "\x5F\xC1\x1D", "\x10\x11",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_18, "Retired X.509 Certificate for Key Management 18",
"2.16.840.1.101.3.7.2.16.18", 3, "\x5F\xC1\x1E", "\x10\x12",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_19, "Retired X.509 Certificate for Key Management 19",
"2.16.840.1.101.3.7.2.16.19", 3, "\x5F\xC1\x1F", "\x10\x13",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_RETIRED_X509_20, "Retired X.509 Certificate for Key Management 20",
"2.16.840.1.101.3.7.2.16.20", 3, "\x5F\xC1\x20", "\x10\x14",
PIV_OBJECT_NOT_PRESENT|PIV_OBJECT_TYPE_CERT},
{ PIV_OBJ_IRIS_IMAGE, "Cardholder Iris Images",
"2.16.840.1.101.3.7.2.16.21", 3, "\x5F\xC1\x21", "\x10\x15", 0},
/* following not standard , to be used by piv-tool only for testing */
{ PIV_OBJ_9B03, "3DES-ECB ADM",
"2.16.840.1.101.3.7.2.9999.3", 2, "\x9B\x03", "\x9B\x03", 0},
/* Only used when signing a cert req, usually from engine
* after piv-tool generated the key and saved the pub key
* to a file. Note RSA key can be 1024, 2048 or 3072
* but still use the "9x06" name.
*/
{ PIV_OBJ_9A06, "RSA 9A Pub key from last genkey",
"2.16.840.1.101.3.7.2.9999.20", 2, "\x9A\x06", "\x9A\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_9C06, "Pub 9C key from last genkey",
"2.16.840.1.101.3.7.2.9999.21", 2, "\x9C\x06", "\x9C\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_9D06, "Pub 9D key from last genkey",
"2.16.840.1.101.3.7.2.9999.22", 2, "\x9D\x06", "\x9D\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_9E06, "Pub 9E key from last genkey",
"2.16.840.1.101.3.7.2.9999.23", 2, "\x9E\x06", "\x9E\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_8206, "Pub 82 key ",
"2.16.840.1.101.3.7.2.9999.101", 2, "\x82\x06", "\x82\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_8306, "Pub 83 key ",
"2.16.840.1.101.3.7.2.9999.102", 2, "\x83\x06", "\x83\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_8406, "Pub 84 key ",
"2.16.840.1.101.3.7.2.9999.103", 2, "\x84\x06", "\x84\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_8506, "Pub 85 key ",
"2.16.840.1.101.3.7.2.9999.104", 2, "\x85\x06", "\x85\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_8606, "Pub 86 key ",
"2.16.840.1.101.3.7.2.9999.105", 2, "\x86\x06", "\x86\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_8706, "Pub 87 key ",
"2.16.840.1.101.3.7.2.9999.106", 2, "\x87\x06", "\x87\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_8806, "Pub 88 key ",
"2.16.840.1.101.3.7.2.9999.107", 2, "\x88\x06", "\x88\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_8906, "Pub 89 key ",
"2.16.840.1.101.3.7.2.9999.108", 2, "\x89\x06", "\x89\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_8A06, "Pub 8A key ",
"2.16.840.1.101.3.7.2.9999.109", 2, "\x8A\x06", "\x8A\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_8B06, "Pub 8B key ",
"2.16.840.1.101.3.7.2.9999.110", 2, "\x8B\x06", "\x8B\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_8C06, "Pub 8C key ",
"2.16.840.1.101.3.7.2.9999.111", 2, "\x8C\x06", "\x8C\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_8D06, "Pub 8D key ",
"2.16.840.1.101.3.7.2.9999.112", 2, "\x8D\x06", "\x8D\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_8E06, "Pub 8E key ",
"2.16.840.1.101.3.7.2.9999.113", 2, "\x8E\x06", "\x8E\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_8F06, "Pub 8F key ",
"2.16.840.1.101.3.7.2.9999.114", 2, "\x8F\x06", "\x8F\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_9006, "Pub 90 key ",
"2.16.840.1.101.3.7.2.9999.115", 2, "\x90\x06", "\x90\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_9106, "Pub 91 key ",
"2.16.840.1.101.3.7.2.9999.116", 2, "\x91\x06", "\x91\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_9206, "Pub 92 key ",
"2.16.840.1.101.3.7.2.9999.117", 2, "\x92\x06", "\x92\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_9306, "Pub 93 key ",
"2.16.840.1.101.3.7.2.9999.118", 2, "\x93\x06", "\x93\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_9406, "Pub 94 key ",
"2.16.840.1.101.3.7.2.9999.119", 2, "\x94\x06", "\x94\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_9506, "Pub 95 key ",
"2.16.840.1.101.3.7.2.9999.120", 2, "\x95\x06", "\x95\x06", PIV_OBJECT_TYPE_PUBKEY},
{ PIV_OBJ_LAST_ENUM, "", "", 0, "", "", 0}
};
static struct sc_card_operations piv_ops;
static struct sc_card_driver piv_drv = {
"PIV-II for multiple cards",
"piv",
&piv_ops,
NULL, 0, NULL
};
static int piv_find_obj_by_containerid(sc_card_t *card, const u8 * str)
{
int i;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "str=0x%02X%02X\n", str[0], str[1]);
for (i = 0; piv_objects[i].enumtag < PIV_OBJ_LAST_ENUM; i++) {
if ( str[0] == piv_objects[i].containerid[0]
&& str[1] == piv_objects[i].containerid[1])
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, i);
}
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, -1);
}
/*
* If ptr == NULL, just return the size of the tag and lenght and data
* otherwise, store tag and length at **ptr, and increment
*/
static size_t put_tag_and_len(unsigned int tag, size_t len, u8 **ptr)
{
int i;
u8 *p;
if (len < 128) {
i = 2;
} else if (len < 256) {
i = 3;
} else {
i = 4;
}
if (ptr) {
p = *ptr;
*p++ = (u8)tag;
switch (i) {
case 2:
*p++ = len;
break;
case 3:
*p++ = 0x81;
*p++ = len;
break;
case 4:
*p++ = 0x82;
*p++ = (u8) (len >> 8);
*p++ = (u8) (len & 0xff);
break;
}
*ptr = p;
} else {
i += len;
}
return i;
}
/*
* Send a command and receive data. There is always something to send.
* Used by GET DATA, PUT DATA, GENERAL AUTHENTICATE
* and GENERATE ASYMMETRIC KEY PAIR.
* GET DATA may call to get the first 128 bytes to get the lenght from the tag.
*
* A caller may provide a buffer, and length to read. If not provided,
* an internal 4096 byte buffer is used, and a copy is returned to the
* caller. that need to be freed by the caller.
*/
static int piv_general_io(sc_card_t *card, int ins, int p1, int p2,
const u8 * sendbuf, size_t sendbuflen, u8 ** recvbuf,
size_t * recvbuflen)
{
int r;
sc_apdu_t apdu;
u8 rbufinitbuf[4096];
u8 *rbuf;
size_t rbuflen;
unsigned int cla_out, tag_out;
const u8 *body;
size_t bodylen;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "%02x %02x %02x %d : %d %d\n",
ins, p1, p2, sendbuflen , card->max_send_size, card->max_recv_size);
rbuf = rbufinitbuf;
rbuflen = sizeof(rbufinitbuf);
/* if caller provided a buffer and length */
if (recvbuf && *recvbuf && recvbuflen && *recvbuflen) {
rbuf = *recvbuf;
rbuflen = *recvbuflen;
}
r = sc_lock(card);
if (r != SC_SUCCESS)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
sc_format_apdu(card, &apdu,
recvbuf ? SC_APDU_CASE_4_SHORT: SC_APDU_CASE_3_SHORT,
ins, p1, p2);
apdu.flags |= SC_APDU_FLAGS_CHAINING;
apdu.lc = sendbuflen;
apdu.datalen = sendbuflen;
apdu.data = sendbuf;
if (recvbuf) {
apdu.resp = rbuf;
apdu.le = (rbuflen > 256) ? 256 : rbuflen;
apdu.resplen = rbuflen;
} else {
apdu.resp = rbuf;
apdu.le = 0;
apdu.resplen = 0;
}
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"calling sc_transmit_apdu flags=%x le=%d, resplen=%d, resp=%p",
apdu.flags, apdu.le, apdu.resplen, apdu.resp);
/* with new adpu.c and chaining, this actually reads the whole object */
r = sc_transmit_apdu(card, &apdu);
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"DEE r=%d apdu.resplen=%d sw1=%02x sw2=%02x",
r, apdu.resplen, apdu.sw1, apdu.sw2);
if (r < 0) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"Transmit failed");
goto err;
}
r = sc_check_sw(card, apdu.sw1, apdu.sw2);
/* TODO: - DEE look later at tag vs size read too */
if (r < 0) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "Card returned error ");
goto err;
}
/*
* See how much we read and make sure it is asn1
* if not, return 0 indicating no data found
*/
rbuflen = 0; /* in case rseplen < 3 i.e. not parseable */
if ( recvbuflen && recvbuf && apdu.resplen > 3) {
*recvbuflen = 0;
/* we should have all the tag data, so we have to tell sc_asn1_find_tag
* the buffer is bigger, so it will not produce "ASN1.tag too long!" */
body = rbuf;
if (sc_asn1_read_tag(&body, 0xffff, &cla_out, &tag_out, &bodylen) != SC_SUCCESS) {
/* only early beta cards had this problem */
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "***** received buffer tag MISSING ");
body = rbuf;
/* some readers/cards might return 6c 00 */
if (apdu.sw1 == 0x61 || apdu.sw2 == 0x6c )
bodylen = 12000;
else
bodylen = apdu.resplen;
}
rbuflen = body - rbuf + bodylen;
/* if using internal buffer, alloc new one */
if (rbuf == rbufinitbuf) {
*recvbuf = malloc(rbuflen);
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "DEE got buffer %p len %d",*recvbuf, rbuflen);
if (*recvbuf == NULL) {
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
memcpy(*recvbuf, rbuf, rbuflen); /* copy tag too */
}
}
if (recvbuflen) {
*recvbuflen = rbuflen;
r = *recvbuflen;
}
err:
sc_unlock(card);
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
/* Add the PIV-II operations */
/* Should use our own keydata, actually should be common to all cards */
/* RSA and EC are added. */
static int piv_generate_key(sc_card_t *card,
sc_cardctl_piv_genkey_info_t *keydata)
{
int r;
u8 *rbuf = NULL;
size_t rbuflen = 0;
u8 *p;
const u8 *tag;
u8 tagbuf[16];
u8 outdata[3]; /* we could also add tag 81 for exponent */
size_t taglen, i;
size_t out_len;
size_t in_len;
unsigned int cla_out, tag_out;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
keydata->exponent = 0;
keydata->pubkey = NULL;
keydata->pubkey_len = 0;
keydata->ecparam = NULL; /* will show size as we only support 2 curves */
keydata->ecparam_len = 0;
keydata->ecpoint = NULL;
keydata->ecpoint_len = 0;
out_len = 3;
outdata[0] = 0x80;
outdata[1] = 0x01;
outdata[2] = keydata->key_algid;
switch (keydata->key_algid) {
case 0x05: keydata->key_bits = 3072; break;
case 0x06: keydata->key_bits = 1024; break;
case 0x07: keydata->key_bits = 2048; break;
/* TODO: - DEE For EC, also set the curve parameter as the OID */
case 0x11: keydata->key_bits = 0;
keydata->ecparam =0; /* we only support prime256v1 for 11 */
keydata->ecparam_len =0;
break;
case 0x14: keydata->key_bits = 0;
keydata->ecparam = 0; /* we only support secp384r1 */
keydata->ecparam_len = 0;
break;
default:
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_INVALID_ARGUMENTS);
}
p = tagbuf;
put_tag_and_len(0xAC, out_len, &p);
memcpy(p, outdata, out_len);
p+=out_len;
r = piv_general_io(card, 0x47, 0x00, keydata->key_num,
tagbuf, p - tagbuf, &rbuf, &rbuflen);
if (r >= 0) {
const u8 *cp;
keydata->exponent = 0;
/* expected tag is 7f49. */
/* we will whatever tag is present */
cp = rbuf;
in_len = rbuflen;
r = sc_asn1_read_tag(&cp, rbuflen, &cla_out, &tag_out, &in_len);
if (r != SC_SUCCESS) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"Tag buffer not found");
goto err;
}
/* if RSA vs EC */
if (keydata->key_bits > 0 ) {
tag = sc_asn1_find_tag(card->ctx, cp, in_len, 0x82, &taglen);
if (tag != NULL && taglen <= 4) {
keydata->exponent = 0;
for (i = 0; i < taglen;i++) {
keydata->exponent = (keydata->exponent<<8) + tag[i];
}
}
tag = sc_asn1_find_tag(card->ctx, cp, in_len, 0x81, &taglen);
if (tag != NULL && taglen > 0) {
keydata->pubkey = malloc(taglen);
if (keydata->pubkey == NULL)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_OUT_OF_MEMORY);
keydata->pubkey_len = taglen;
memcpy (keydata->pubkey, tag, taglen);
}
} else { /* must be EC */
tag = sc_asn1_find_tag(card->ctx, cp, in_len, 0x86, &taglen);
if (tag != NULL && taglen > 0) {
keydata->ecpoint = malloc(taglen);
if (keydata->ecpoint == NULL)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_OUT_OF_MEMORY);
keydata->ecpoint_len = taglen;
memcpy (keydata->ecpoint, tag, taglen);
}
}
/* TODO: -DEE Could add key to cache so could use engine to generate key,
* and sign req in single operation */
r = 0;
}
err:
if (rbuf)
free(rbuf);
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
static int piv_select_aid(sc_card_t* card, u8* aid, size_t aidlen, u8* response, size_t *responselen)
{
sc_apdu_t apdu;
int r;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,
"Got args: aid=%x, aidlen=%d, response=%x, responselen=%d\n",
aid, aidlen, response, responselen ? *responselen : 0);
sc_format_apdu(card, &apdu,
response == NULL ? SC_APDU_CASE_3_SHORT : SC_APDU_CASE_4_SHORT, 0xA4, 0x04, 0x00);
apdu.lc = aidlen;
apdu.data = aid;
apdu.datalen = aidlen;
apdu.resp = response;
apdu.resplen = responselen ? *responselen : 0;
apdu.le = response == NULL ? 0 : 256; /* could be 21 for fci */
r = sc_transmit_apdu(card, &apdu);
if (responselen)
*responselen = apdu.resplen;
SC_TEST_RET(card->ctx, SC_LOG_DEBUG_NORMAL, r, "PIV select failed");
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, sc_check_sw(card, apdu.sw1, apdu.sw2));
}
/* find the PIV AID on the card. If card->type already filled in,
* then look for specific AID only
* Assumes that priv may not be present
*/
static int piv_find_aid(sc_card_t * card, sc_file_t *aid_file)
{
sc_apdu_t apdu;
u8 rbuf[SC_MAX_APDU_BUFFER_SIZE];
int r,i;
const u8 *tag;
size_t taglen;
const u8 *pix;
size_t pixlen;
size_t resplen = sizeof(rbuf);
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
/* first see if the default applcation will return a template
* that we know about.
*/
if (card->type == SC_CARD_TYPE_PIV_II_GENERIC)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, 0);
r = piv_select_aid(card, piv_aids[0].value, piv_aids[0].len_short, rbuf, &resplen);
if (r >= 0 && resplen > 2 ) {
tag = sc_asn1_find_tag(card->ctx, rbuf, resplen, 0x61, &taglen);
if (tag != NULL) {
pix = sc_asn1_find_tag(card->ctx, tag, taglen, 0x4F, &pixlen);
if (pix != NULL ) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"found PIX");
/* early cards returned full AID, rather then just the pix */
for (i = 0; piv_aids[i].len_long != 0; i++) {
if ((pixlen >= 6 && memcmp(pix, piv_aids[i].value + 5,
piv_aids[i].len_long - 5 ) == 0)
|| ((pixlen >= piv_aids[i].len_short &&
memcmp(pix, piv_aids[i].value,
piv_aids[i].len_short) == 0))) {
if (card->type > SC_CARD_TYPE_PIV_II_BASE &&
card->type < SC_CARD_TYPE_PIV_II_BASE+1000 &&
card->type == piv_aids[i].enumtag) {
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, i);
} else {
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, i);
}
}
}
}
}
}
/* for testing, we can force the use of a specific AID
* by using the card= parameter in conf file
*/
for (i = 0; piv_aids[i].len_long != 0; i++) {
if (card->type > SC_CARD_TYPE_PIV_II_BASE &&
card->type < SC_CARD_TYPE_PIV_II_BASE+1000 &&
card->type != piv_aids[i].enumtag) {
continue;
}
sc_format_apdu(card, &apdu, SC_APDU_CASE_4_SHORT, 0xA4, 0x04, 0x00);
apdu.lc = piv_aids[i].len_long;
apdu.data = piv_aids[i].value;
apdu.datalen = apdu.lc;
apdu.resp = rbuf;
apdu.resplen = sizeof(rbuf);
apdu.le = 256;
r = sc_transmit_apdu(card, &apdu);
SC_TEST_RET(card->ctx, SC_LOG_DEBUG_NORMAL, r, "APDU transmit failed");
r = sc_check_sw(card, apdu.sw1, apdu.sw2);
if (r) {
if (card->type != 0 && card->type == piv_aids[i].enumtag) {
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, i);
}
continue;
}
if ( apdu.resplen == 0 && r == 0) {
/* could be the MSU card */
continue; /* other cards will return a FCI */
}
if (apdu.resp[0] != 0x6f || apdu.resp[1] > apdu.resplen - 2 )
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, SC_ERROR_NO_CARD_SUPPORT);
card->ops->process_fci(card, aid_file, apdu.resp+2, apdu.resp[1]);
if (aid_file->name == NULL)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_NO_CARD_SUPPORT);
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, i);
}
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_NO_CARD_SUPPORT);
}
/*
* Read a DER encoded object from a file. Allocate and return the buf.
* Used to read the file defined in offCardCertURL from a cache.
* Also used for testing of History and Discovery objects from a file
* when testing with a card that does not support these new objects.
*/
static int piv_read_obj_from_file(sc_card_t * card, char * filename,
u8 **buf, size_t *buf_len)
{
int r;
int f = -1;
size_t len;
u8 tagbuf[16];
size_t rbuflen;
const u8 * body;
unsigned int cla_out, tag_out;
size_t bodylen;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
*buf = NULL;
*buf_len = 0;
f = open(filename, O_RDONLY);
if (f < 0) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,
"Unable to load PIV off card file: \"%s\"\n",filename);
r = SC_ERROR_FILE_NOT_FOUND;
goto err;
}
len = read(f, tagbuf, sizeof(tagbuf)); /* get tag and length */
if (len < 2 || len > sizeof(tagbuf)) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"Problem with \"%s\"\n",filename);
r = SC_ERROR_DATA_OBJECT_NOT_FOUND;
goto err;
}
body = tagbuf;
if (sc_asn1_read_tag(&body, 0xfffff, &cla_out,
&tag_out, &bodylen) != SC_SUCCESS) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "DER problem\n");
r = SC_ERROR_INVALID_ASN1_OBJECT;
goto err;
}
rbuflen = body - tagbuf + bodylen;
*buf = malloc(rbuflen);
if (!*buf) {
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
memcpy(*buf, tagbuf, len); /* copy first or only part */
if (rbuflen > len) {
len = read(f, *buf + sizeof(tagbuf), rbuflen - sizeof(tagbuf)); /* read rest */
if (len != rbuflen - sizeof(tagbuf)) {
r = SC_ERROR_INVALID_ASN1_OBJECT;
free (*buf);
*buf = NULL;
goto err;
}
}
r = rbuflen;
*buf_len = rbuflen;
err:
if (f >= 0)
close(f);
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
/* the tag is the PIV_OBJ_* */
static int piv_get_data(sc_card_t * card, int enumtag,
u8 **buf, size_t *buf_len)
{
u8 *p;
int r = 0;
u8 tagbuf[8];
size_t tag_len;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "#%d \n", enumtag);
/* assert(enumtag >= 0 && enumtag < PIV_OBJ_LAST_ENUM); */
tag_len = piv_objects[enumtag].tag_len;
p = tagbuf;
put_tag_and_len(0x5c, tag_len, &p);
memcpy(p, piv_objects[enumtag].tag_value, tag_len);
p += tag_len;
if (*buf_len == 1 && *buf == NULL) { /* we need to get the length */
u8 rbufinitbuf[8]; /* tag of 53 with 82 xx xx will fit in 4 */
u8 *rbuf;
size_t rbuflen;
size_t bodylen;
unsigned int cla_out, tag_out;
const u8 *body;
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"get len of #%d", enumtag);
rbuf = rbufinitbuf;
rbuflen = sizeof(rbufinitbuf);
r = piv_general_io(card, 0xCB, 0x3F, 0xFF, tagbuf, p - tagbuf,
&rbuf, &rbuflen);
if (r > 0) {
body = rbuf;
if (sc_asn1_read_tag(&body, 0xffff, &cla_out, &tag_out, &bodylen) != SC_SUCCESS) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "***** received buffer tag MISSING ");
r = SC_ERROR_FILE_NOT_FOUND;
goto err;
}
*buf_len = r;
} else if ( r == 0) {
r = SC_ERROR_FILE_NOT_FOUND;
goto err;
} else {
goto err;
}
}
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"get buffer for #%d len %d", enumtag, *buf_len);
if (*buf == NULL && *buf_len > 0) {
*buf = malloc(*buf_len);
if (*buf == NULL ) {
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
}
r = piv_general_io(card, 0xCB, 0x3F, 0xFF, tagbuf, p - tagbuf,
buf, buf_len);
err:
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
static int piv_get_cached_data(sc_card_t * card, int enumtag,
u8 **buf, size_t *buf_len)
{
piv_private_data_t * priv = PIV_DATA(card);
int r;
u8 *rbuf = NULL;
size_t rbuflen;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "#%d", enumtag);
assert(enumtag >= 0 && enumtag < PIV_OBJ_LAST_ENUM);
/* see if we have it cached */
if (priv->obj_cache[enumtag].flags & PIV_OBJ_CACHE_VALID) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"found #%d %p:%d %p:%d",
enumtag,
priv->obj_cache[enumtag].obj_data,
priv->obj_cache[enumtag].obj_len,
priv->obj_cache[enumtag].internal_obj_data,
priv->obj_cache[enumtag].internal_obj_len);
if (priv->obj_cache[enumtag].obj_len == 0) {
r = SC_ERROR_FILE_NOT_FOUND;
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"#%d found but len=0",
enumtag);
goto err;
}
*buf = priv->obj_cache[enumtag].obj_data;
*buf_len = priv->obj_cache[enumtag].obj_len;
r = *buf_len;
goto ok;
}
/*
* If we know it can not be on the card i.e. History object
* has been read, and we know what other certs may or
* may not be on the card. We can avoid extra overhead
*/
if (priv->obj_cache[enumtag].flags & PIV_OBJ_CACHE_NOT_PRESENT) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"no_obj #%d", enumtag);
r = SC_ERROR_FILE_NOT_FOUND;
goto err;
}
/* Not cached, try to get it, piv_get_data will allocate a buf */
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"get #%d", enumtag);
rbuflen = 1;
r = piv_get_data(card, enumtag, &rbuf, &rbuflen);
if (r > 0) {
priv->obj_cache[enumtag].flags |= PIV_OBJ_CACHE_VALID;
priv->obj_cache[enumtag].obj_len = r;
priv->obj_cache[enumtag].obj_data = rbuf;
*buf = rbuf;
*buf_len = r;
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"added #%d %p:%d %p:%d",
enumtag,
priv->obj_cache[enumtag].obj_data,
priv->obj_cache[enumtag].obj_len,
priv->obj_cache[enumtag].internal_obj_data,
priv->obj_cache[enumtag].internal_obj_len);
} else if (r == 0 || r == SC_ERROR_FILE_NOT_FOUND) {
r = SC_ERROR_FILE_NOT_FOUND;
priv->obj_cache[enumtag].flags |= PIV_OBJ_CACHE_VALID;
priv->obj_cache[enumtag].obj_len = 0;
} else if ( r < 0) {
goto err;
}
ok:
err:
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
static int piv_cache_internal_data(sc_card_t *card, int enumtag)
{
piv_private_data_t * priv = PIV_DATA(card);
const u8* tag;
const u8* body;
size_t taglen;
size_t bodylen;
int compressed = 0;
/* if already cached */
if (priv->obj_cache[enumtag].internal_obj_data && priv->obj_cache[enumtag].internal_obj_len) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"#%d found internal %p:%d", enumtag,
priv->obj_cache[enumtag].internal_obj_data,
priv->obj_cache[enumtag].internal_obj_len);
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, 0);
}
body = sc_asn1_find_tag(card->ctx,
priv->obj_cache[enumtag].obj_data,
priv->obj_cache[enumtag].obj_len,
0x53, &bodylen);
if (body == NULL)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_OBJECT_NOT_VALID);
/* get the certificate out */
if (piv_objects[enumtag].flags & PIV_OBJECT_TYPE_CERT) {
tag = sc_asn1_find_tag(card->ctx, body, bodylen, 0x71, &taglen);
/* 800-72-1 not clear if this is 80 or 01 Sent comment to NIST for 800-72-2 */
if (tag && (((*tag) & 0x80) || ((*tag) & 0x01))) {
compressed = 1;
}
tag = sc_asn1_find_tag(card->ctx, body, bodylen, 0x70, &taglen);
if (tag == NULL)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_OBJECT_NOT_VALID);
if (taglen == 0)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_FILE_NOT_FOUND);
if(compressed) {
#ifdef ENABLE_ZLIB
size_t len;
u8* newBuf = NULL;
if(SC_SUCCESS != sc_decompress_alloc(&newBuf, &len, tag, taglen, COMPRESSION_AUTO)) {
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_OBJECT_NOT_VALID);
}
priv->obj_cache[enumtag].internal_obj_data = newBuf;
priv->obj_cache[enumtag].internal_obj_len = len;
#else
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"PIV compression not supported, no zlib");
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_NOT_SUPPORTED);
#endif
} else {
if (!(priv->obj_cache[enumtag].internal_obj_data = malloc(taglen)))
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_OUT_OF_MEMORY);
memcpy(priv->obj_cache[enumtag].internal_obj_data, tag, taglen);
priv->obj_cache[enumtag].internal_obj_len = taglen;
}
/* convert pub key to internal */
/* TODO: -DEE need to fix ... would only be used if we cache the pub key, but we don't today */
} else if (piv_objects[enumtag].flags & PIV_OBJECT_TYPE_PUBKEY) {
tag = sc_asn1_find_tag(card->ctx, body, bodylen, *body, &taglen);
if (tag == NULL)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_OBJECT_NOT_VALID);
if (taglen == 0)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_FILE_NOT_FOUND);
if (!(priv->obj_cache[enumtag].internal_obj_data = malloc(taglen)))
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_OUT_OF_MEMORY);
memcpy(priv->obj_cache[enumtag].internal_obj_data, tag, taglen);
priv->obj_cache[enumtag].internal_obj_len = taglen;
} else {
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_INTERNAL);
}
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"added #%d internal %p:%d", enumtag,
priv->obj_cache[enumtag].internal_obj_data,
priv->obj_cache[enumtag].internal_obj_len);
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, 0);
}
/*
* Callers of this may be expecting a certificate,
* select file will have saved the object type for us
* as well as set that we want the cert from the object.
*/
static int piv_read_binary(sc_card_t *card, unsigned int idx,
unsigned char *buf, size_t count, unsigned long flags)
{
piv_private_data_t * priv = PIV_DATA(card);
int enumtag;
int r;
u8 *rbuf = NULL;
size_t rbuflen = 0;
const u8 *body;
size_t bodylen;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
if (priv->selected_obj < 0)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_INTERNAL);
enumtag = piv_objects[priv->selected_obj].enumtag;
if (priv->rwb_state == -1) {
r = piv_get_cached_data(card, enumtag, &rbuf, &rbuflen);
if (r >=0) {
/* an object with no data will be considered not found */
/* Discovery tag = 0x73, all others are 0x53 */
if (!rbuf || rbuf[0] == 0x00 || ((rbuf[0]&0xDF) == 0x53 && rbuf[1] == 0x00)) {
r = SC_ERROR_FILE_NOT_FOUND;
goto err;
}
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "DEE rbuf=%p,rbuflen=%d,",rbuf, rbuflen);
body = sc_asn1_find_tag(card->ctx, rbuf, rbuflen, rbuf[0], &bodylen);
if (body == NULL) {
/* if missing, assume its the body */
/* DEE bug in the beta card */
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL," ***** tag 0x53 MISSING \n");
r = SC_ERROR_INVALID_DATA;
goto err;
}
if (bodylen > body - rbuf + rbuflen) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL," ***** tag length > then data: %d>%d+%d",
bodylen , body - rbuf, rbuflen);
r = SC_ERROR_INVALID_DATA;
goto err;
}
/* if cached obj has internal interesting data (cert or pub key) */
if (priv->return_only_cert || piv_objects[enumtag].flags & PIV_OBJECT_TYPE_PUBKEY) {
r = piv_cache_internal_data(card, enumtag);
if (r < 0)
goto err;
}
}
priv->rwb_state = 0;
}
if (priv->return_only_cert || piv_objects[enumtag].flags & PIV_OBJECT_TYPE_PUBKEY) {
rbuf = priv->obj_cache[enumtag].internal_obj_data;
rbuflen = priv->obj_cache[enumtag].internal_obj_len;
} else {
rbuf = priv->obj_cache[enumtag].obj_data;
rbuflen = priv->obj_cache[enumtag].obj_len;
}
/* rbuf rbuflen has pointer and length to cached data */
if ( rbuflen < idx + count)
count = rbuflen - idx;
if (count <= 0) {
r = 0;
priv->rwb_state = 1;
} else {
memcpy(buf, rbuf + idx, count);
r = count;
}
err:
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
/*
* the tag is the PIV_OBJ_*
* The buf should have the 0x53 tag+len+tags and data
*/
static int piv_put_data(sc_card_t *card, int tag,
const u8 *buf, size_t buf_len)
{
int r;
u8 * sbuf;
size_t sbuflen;
u8 * p;
size_t tag_len;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
tag_len = piv_objects[tag].tag_len;
sbuflen = put_tag_and_len(0x5c, tag_len, NULL) + buf_len;
if (!(sbuf = malloc(sbuflen)))
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_OUT_OF_MEMORY);
p = sbuf;
put_tag_and_len(0x5c, tag_len, &p);
memcpy(p, piv_objects[tag].tag_value, tag_len);
p += tag_len;
memcpy(p, buf, buf_len);
p += buf_len;
r = piv_general_io(card, 0xDB, 0x3F, 0xFF,
sbuf, p - sbuf, NULL, NULL);
if (sbuf)
free(sbuf);
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
static int piv_write_certificate(sc_card_t *card,
const u8* buf, size_t count,
unsigned long flags) {
piv_private_data_t * priv = PIV_DATA(card);
int enumtag;
int r = SC_SUCCESS;
u8 *sbuf = NULL;
u8 *p;
size_t sbuflen;
size_t taglen;
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"DEE cert len=%d",count);
taglen = put_tag_and_len(0x70, count, NULL)
+ put_tag_and_len(0x71, 1, NULL)
+ put_tag_and_len(0xFE, 0, NULL);
sbuflen = put_tag_and_len(0x53, taglen, NULL);
sbuf = malloc(sbuflen);
if (sbuf == NULL)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_OUT_OF_MEMORY);
p = sbuf;
put_tag_and_len(0x53, taglen, &p);
put_tag_and_len(0x70, count, &p);
memcpy(p, buf, count);
p += count;
put_tag_and_len(0x71, 1, &p);
*p++ = (flags)? 0x80:0x00; /* certinfo, i.e. gziped? */
put_tag_and_len(0xFE,0,&p); /* LRC tag */
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"DEE buf %p len %d %d", sbuf, p -sbuf, sbuflen);
enumtag = piv_objects[priv->selected_obj].enumtag;
r = piv_put_data(card, enumtag, sbuf, sbuflen);
if (sbuf)
free(sbuf);
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
/*
* For certs we need to add the 0x53 tag and other specific tags,
* and call the piv_put_data
* Note: the select file will have saved the object type for us
* Write is used by piv-tool, so we will use flags:
* length << 8 | 8bits:
* object xxxx0000
* uncompresed cert xxx00001
* compressed cert xxx10001
* pubkey xxxx0010
*
* to indicate we are writing a cert and if is compressed
* or if we are writing a pubkey in to the cache.
* if its not a cert or pubkey its an object.
*
* Therefore when idx=0, we will get the length of the object
* and allocate a buffer, so we can support partial writes.
* When the last chuck of the data is sent, we will write it.
*/
static int piv_write_binary(sc_card_t *card, unsigned int idx,
const u8 *buf, size_t count, unsigned long flags)
{
piv_private_data_t * priv = PIV_DATA(card);
int r;
int enumtag;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
if (priv->selected_obj < 0)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_INTERNAL);
enumtag = piv_objects[priv->selected_obj].enumtag;
if (priv->rwb_state == 1) /* trying to write at end */
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, 0);
if (priv->rwb_state == -1) {
/* if cached, remove old entry */
if (priv->obj_cache[enumtag].flags & PIV_OBJ_CACHE_VALID) {
priv->obj_cache[enumtag].flags = 0;
if (priv->obj_cache[enumtag].obj_data) {
free(priv->obj_cache[enumtag].obj_data);
priv->obj_cache[enumtag].obj_data = NULL;
priv->obj_cache[enumtag].obj_len = 0;
}
if (priv->obj_cache[enumtag].internal_obj_data) {
free(priv->obj_cache[enumtag].internal_obj_data);
priv->obj_cache[enumtag].internal_obj_data = NULL;
priv->obj_cache[enumtag].internal_obj_len = 0;
}
}
if (idx != 0)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_NO_CARD_SUPPORT);
priv->w_buf_len = flags>>8;
if (priv->w_buf_len == 0)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_INTERNAL);
priv->w_buf = malloc(priv->w_buf_len);
priv-> rwb_state = 0;
}
/* on each pass make sure we have w_buf */
if (priv->w_buf == NULL)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_OUT_OF_MEMORY);
if (idx + count > priv->w_buf_len)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_OBJECT_NOT_VALID);
memcpy(priv->w_buf + idx, buf, count); /* copy one chunk */
/* if this was not the last chunk, return to get rest */
if (idx + count < priv->w_buf_len)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, count);
priv-> rwb_state = 1; /* at end of object */
switch (flags & 0x0f) {
case 1:
r = piv_write_certificate(card, priv->w_buf, priv->w_buf_len,
flags & 0x10);
break;
case 2: /* pubkey to be added to cache, it should have 0x53 and 0x99 tags. */
/* TODO: -DEE this is not fully implemented and not used */
r = priv->w_buf_len;
break;
default:
r = piv_put_data(card, enumtag, priv->w_buf, priv->w_buf_len);
break;
}
/* if it worked, will cache it */
if (r >= 0 && priv->w_buf) {
priv->obj_cache[enumtag].flags |= PIV_OBJ_CACHE_VALID;
priv->obj_cache[enumtag].obj_data = priv->w_buf;
priv->obj_cache[enumtag].obj_len = priv->w_buf_len;
} else {
if (priv->w_buf)
free(priv->w_buf);
}
priv->w_buf = NULL;
priv->w_buf_len = 0;
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, (r < 0)? r : (int)count);
}
/*
* Card initialization is NOT standard.
* Some cards use mutual or external authentication usings 3des or aes key. We
* will read in the key from a file either binary or hex encided.
* This is only needed during initialization/personalization of the card
*/
#ifdef ENABLE_OPENSSL
static const EVP_CIPHER *get_cipher_for_algo(int alg_id)
{
switch (alg_id) {
case 0x0: return EVP_des_ede3_ecb();
case 0x1: return EVP_des_ede3_ecb(); /* 2TDES */
case 0x3: return EVP_des_ede3_ecb();
case 0x8: return EVP_aes_128_ecb();
case 0xA: return EVP_aes_192_ecb();
case 0xC: return EVP_aes_256_ecb();
default: return NULL;
}
}
#endif
static int get_keylen(unsigned int alg_id, size_t *size)
{
switch(alg_id) {
case 0x01: *size = 192/8; /* 2TDES still has 3 single des keys phase out by 12/31/2010 */
break;
case 0x00:
case 0x03: *size = 192/8;
break;
case 0x08: *size = 128/8;
break;
case 0x0A: *size = 192/8;
break;
case 0x0C: *size = 256/8;
break;
default:
return SC_ERROR_INVALID_ARGUMENTS;
}
return SC_SUCCESS;
}
static int piv_get_key(sc_card_t *card, unsigned int alg_id, u8 **key, size_t *len)
{
int r;
size_t fsize;
FILE *f = NULL;
char * keyfilename = NULL;
size_t expected_keylen;
size_t keylen;
u8 * keybuf = NULL;
u8 * tkey = NULL;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
keyfilename = (char *)getenv("PIV_EXT_AUTH_KEY");
if (keyfilename == NULL) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,
"Unable to get PIV_EXT_AUTH_KEY=(null) for general_external_authenticate\n");
r = SC_ERROR_FILE_NOT_FOUND;
goto err;
}
r = get_keylen(alg_id, &expected_keylen);
if(r) {
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Invalid cipher selector, none found for: %02x\n", alg_id);
r = SC_ERROR_INVALID_ARGUMENTS;
goto err;
}
f = fopen(keyfilename, "rb");
if (!f) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL," Unable to load key from file\n");
r = SC_ERROR_FILE_NOT_FOUND;
goto err;
}
fseek(f, 0L, SEEK_END);
fsize = ftell(f);
fseek(f, 0L, SEEK_SET);
keybuf = malloc(fsize+1); /* if not binary, need null to make it a string */
if (!keybuf) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL," Unable to allocate key memory");
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
keybuf[fsize] = 0x00; /* incase it is text need null */
if (fread(keybuf, 1, fsize, f) != fsize) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL," Unable to read key\n");
r = SC_ERROR_WRONG_LENGTH;
goto err;
}
tkey = malloc(expected_keylen);
if (!tkey) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL," Unable to allocate key memory");
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
if (fsize == expected_keylen) { /* it must be binary */
memcpy(tkey, keybuf, expected_keylen);
} else {
/* if the key-length is larger then binary length, we assume hex encoded */
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Treating key as hex-encoded!\n");
sc_right_trim(keybuf, fsize);
keylen = expected_keylen;
r = sc_hex_to_bin((char *)keybuf, tkey, &keylen);
if (keylen !=expected_keylen || r != 0 ) {
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Error formatting key\n");
if (r == 0)
r = SC_ERROR_INCOMPATIBLE_KEY;
goto err;
}
}
*key = tkey;
tkey = NULL;
*len = expected_keylen;
r = SC_SUCCESS;
err:
if (f)
fclose(f);
if (keybuf) {
free(keybuf);
}
if (tkey) {
free(tkey);
}
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
return r;
}
/*
* will only deal with 3des for now
* assumptions include:
* size of encrypted data is same as unencrypted
* challenges, nonces etc from card are less then 114 (keeps tags simple)
*/
static int piv_general_mutual_authenticate(sc_card_t *card,
unsigned int key_ref, unsigned int alg_id)
{
int r;
#ifdef ENABLE_OPENSSL
int N;
int locked = 0, outl, outl2;
u8 *rbuf = NULL;
size_t rbuflen;
u8 nonce[8] = {0xDE, 0xE0, 0xDE, 0xE1, 0xDE, 0xE2, 0xDE, 0xE3};
u8 sbuf[255];
u8 *p, *q;
u8 *key = NULL;
size_t keylen;
EVP_CIPHER_CTX ctx;
const EVP_CIPHER *cipher;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
EVP_CIPHER_CTX_init(&ctx);
cipher = get_cipher_for_algo(alg_id);
if(!cipher) {
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Invalid cipher selector, none found for: %02x\n", alg_id);
r = SC_ERROR_INVALID_ARGUMENTS;
goto err;
}
r = piv_get_key(card, alg_id, &key, &keylen);
if (r) {
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Error geting General Auth key\n");
goto err;
}
r = sc_lock(card);
if (r != SC_SUCCESS)
goto err;
locked = 1;
p = sbuf;
*p++ = 0x7C;
*p++ = 0x02;
*p++ = 0x80;
*p++ = 0x00;
/* get the encrypted nonce */
r = piv_general_io(card, 0x87, alg_id, key_ref, sbuf, p - sbuf, &rbuf, &rbuflen);
if (r < 0) goto err;
q = rbuf;
if ( (*q++ != 0x7C)
|| (*q++ != rbuflen - 2)
|| (*q++ != 0x80)
|| (*q++ != rbuflen - 4)) {
r = SC_ERROR_INVALID_DATA;
goto err;
}
N = *(rbuf + 3); /* assuming N + sizeof(nonce) + 6 < 128 */
/* prepare the response */
p = sbuf;
*p++ = 0x7c;
*p++ = N + sizeof(nonce)+ 4;
*p++ = 0x80;
*p++ = (u8)N;
/* decrypt the data from the card */
if (!EVP_DecryptInit(&ctx, cipher, key, NULL)) {
/* may fail if des parity of key is wrong. depends on OpenSSL options */
r = SC_ERROR_INTERNAL;
goto err;
}
EVP_CIPHER_CTX_set_padding(&ctx,0);
if (!EVP_DecryptUpdate(&ctx, p, &outl, q, N)) {
r = SC_ERROR_INTERNAL;
goto err;
}
if(!EVP_DecryptFinal(&ctx, p+outl, &outl2)) {
r = SC_ERROR_INTERNAL;
goto err;
}
if (outl+outl2 != N) {
r = SC_ERROR_INTERNAL;
goto err;
}
p += N;
*p++ = 0x81;
*p++ = sizeof(nonce);
memcpy(p, &nonce, sizeof(nonce)); /* we use a fixed nonce for now */
p += sizeof(nonce);
free(rbuf);
rbuf = NULL;
r = piv_general_io(card, 0x87, alg_id, key_ref, sbuf, p - sbuf, &rbuf, &rbuflen);
if (r < 0) goto err;
q = rbuf;
if ( (*q++ != 0x7C)
|| (*q++ != rbuflen - 2)
|| ((*q++ | 0x02) != 0x82) /* SP800-73 not clear if 80 or 82 */
|| (*q++ != rbuflen - 4)) {
r = SC_ERROR_INVALID_DATA;
goto err;
}
N = *(rbuf + 3);
p = sbuf;
EVP_CIPHER_CTX_cleanup(&ctx);
EVP_CIPHER_CTX_init(&ctx);
if (!EVP_DecryptInit(&ctx, cipher, key, NULL)) {
r = SC_ERROR_INTERNAL;
goto err;
}
EVP_CIPHER_CTX_set_padding(&ctx,0);
if (!EVP_DecryptUpdate(&ctx, p, &outl, q, N)) {
r = SC_ERROR_INTERNAL;
goto err;
}
if(!EVP_DecryptFinal(&ctx, p+outl, &outl2)) {
r = SC_ERROR_INTERNAL;
goto err;
}
if (outl+outl2 != sizeof(nonce) || memcmp(nonce, p, sizeof(nonce)) != 0) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "mutual authentication failed, card returned wrong value");
r = SC_ERROR_DECRYPT_FAILED;
goto err;
}
r = SC_SUCCESS;
err:
EVP_CIPHER_CTX_cleanup(&ctx);
if (locked)
sc_unlock(card);
if (rbuf)
free(rbuf);
#else
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"OpenSSL Required");
r = SC_ERROR_NOT_SUPPORTED;
#endif /* ENABLE_OPENSSL */
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
/* Currently only used for card administration */
static int piv_general_external_authenticate(sc_card_t *card,
unsigned int key_ref, unsigned int alg_id)
{
int r;
#ifdef ENABLE_OPENSSL
int tmplen;
int outlen;
int locked = 0;
u8 *p;
u8 *rbuf = NULL;
u8 *key = NULL;
u8 *cypher_text = NULL;
u8 *output_buf = NULL;
const u8 *body = NULL;
const u8 *challenge_data = NULL;
size_t rbuflen;
size_t body_len;
size_t output_len;
size_t challenge_len;
size_t keylen = 0;
size_t cypher_text_len = 0;
u8 sbuf[255];
EVP_CIPHER_CTX ctx;
const EVP_CIPHER *cipher;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
EVP_CIPHER_CTX_init(&ctx);
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Selected cipher for algorithm id: %02x\n", alg_id);
cipher = get_cipher_for_algo(alg_id);
if(!cipher) {
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Invalid cipher selector, none found for: %02x\n", alg_id);
r = SC_ERROR_INVALID_ARGUMENTS;
goto err;
}
r = piv_get_key(card, alg_id, &key, &keylen);
if (r) {
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Error geting General Auth key\n");
goto err;
}
r = sc_lock(card);
if (r != SC_SUCCESS)
goto err;
locked = 1;
p = sbuf;
*p++ = 0x7C;
*p++ = 0x02;
*p++ = 0x81;
*p++ = 0x00;
/* get a challenge */
r = piv_general_io(card, 0x87, alg_id, key_ref, sbuf, p - sbuf, &rbuf, &rbuflen);
if (r < 0) {
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Error getting Challenge\n");
goto err;
}
/*
* the value here corresponds with the response size, so we use this
* to alloc the response buffer, rather than re-computing it.
*/
output_len = r;
/* Remove the encompassing outer TLV of 0x7C and get the data */
body = sc_asn1_find_tag(card->ctx, rbuf,
r, 0x7C, &body_len);
if (!body) {
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Invalid Challenge Data response of NULL\n");
r = SC_ERROR_INVALID_DATA;
goto err;
}
/* Get the challenge data indicated by the TAG 0x81 */
challenge_data = sc_asn1_find_tag(card->ctx, body,
body_len, 0x81, &challenge_len);
if (!challenge_data) {
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Invalid Challenge Data none found in TLV\n");
r = SC_ERROR_INVALID_DATA;
goto err;
}
/* Store this to sanity check that plaintext length and cyphertext lengths match */
/* TODO is this required */
tmplen = challenge_len;
/* Encrypt the challenge with the secret */
if (!EVP_EncryptInit(&ctx, cipher, key, NULL)) {
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Encrypt fail\n");
r = SC_ERROR_INTERNAL;
goto err;
}
cypher_text = malloc(challenge_len);
if (!cypher_text) {
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Could not allocate buffer for cipher text\n");
r = SC_ERROR_INTERNAL;
goto err;
}
EVP_CIPHER_CTX_set_padding(&ctx,0);
if (!EVP_EncryptUpdate(&ctx, cypher_text, &outlen, challenge_data, challenge_len)) {
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Encrypt update fail\n");
r = SC_ERROR_INTERNAL;
goto err;
}
cypher_text_len += outlen;
if (!EVP_EncryptFinal(&ctx, cypher_text + cypher_text_len, &outlen)) {
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Final fail\n");
r = SC_ERROR_INTERNAL;
goto err;
}
cypher_text_len += outlen;
/*
* Actually perform the sanity check on lengths plaintext length vs
* encrypted length
*/
if (cypher_text_len != (size_t)tmplen) {
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Length test fail\n");
r = SC_ERROR_INTERNAL;
goto err;
}
output_buf = malloc(output_len);
if(!output_buf) {
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Could not allocate output buffer: %s\n",
strerror(errno));
r = SC_ERROR_INTERNAL;
goto err;
}
p = output_buf;
/*
* Build: 7C<len>[82<len><challenge>]
* Start off by capturing the data of the response:
* - 82<len><encrypted challenege response>
* Build the outside TLV (7C)
* Advance past that tag + len
* Build the body (82)
* memcopy the body past the 7C<len> portion
* Transmit
*/
tmplen = put_tag_and_len(0x82, cypher_text_len, NULL);
tmplen = put_tag_and_len(0x7C, tmplen, &p);
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Tmplen2: %zd\n", tmplen);
/* Build the 0x82 TLV and append to the 7C<len> tag */
tmplen += put_tag_and_len(0x82, cypher_text_len, &p);
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Tmplen1: %zd\n", tmplen);
memcpy(p, cypher_text, cypher_text_len);
p += cypher_text_len;
tmplen += cypher_text_len;
/* Sanity check the lengths again */
if(output_len != (size_t)tmplen) {
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Allocated and computed lengths do not match! "
"Expected %zd, found: %d\n", output_len, tmplen);
r = SC_ERROR_INTERNAL;
goto err;
}
r = piv_general_io(card, 0x87, alg_id, key_ref, output_buf, output_len, NULL, NULL);
sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "Got response challenge\n");
err:
EVP_CIPHER_CTX_cleanup(&ctx);
if (locked)
sc_unlock(card);
if (key) {
sc_mem_clear(key, keylen);
free(key);
}
if (rbuf)
free(rbuf);
if (cypher_text)
free(cypher_text);
if (output_buf)
free(output_buf);
#else
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"OpenSSL Required");
r = SC_ERROR_NOT_SUPPORTED;
#endif /* ENABLE_OPENSSL */
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
static int piv_get_serial_nr_from_CHUI(sc_card_t* card, sc_serial_number_t* serial)
{
int r;
int i;
u8 gbits;
u8 *rbuf = NULL;
const u8 *body;
const u8 *fascn;
const u8 *guid;
size_t rbuflen = 0, bodylen, fascnlen, guidlen;
u8 temp[2000];
size_t templen = sizeof(temp);
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
if (card->serialnr.len) {
*serial = card->serialnr;
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_SUCCESS);
}
/* ensure we've got the PIV selected, and nothing else is in process */
/* This fixes several problems due to previous incomplete APDUs during card detection */
/* Note: We need the temp because (some?) Oberthur cards don't like selecting an applet without response data */
/* 800-73-3 part1 draft, and CIO Council docs imply for PIV Compatible card
* The FASC-N Agency code should be 9999 and there should be a GUID
* based on RFC 4122. RIf so and the GUID is not all 0's
* we will use the GUID as the serial number.
*/
piv_select_aid(card, piv_aids[0].value, piv_aids[0].len_short, temp, &templen);
r = piv_get_cached_data(card, PIV_OBJ_CHUI, &rbuf, &rbuflen);
SC_TEST_RET(card->ctx, SC_LOG_DEBUG_NORMAL, r, "Failure retrieving CHUI");
r = SC_ERROR_INTERNAL;
if (rbuflen != 0) {
body = sc_asn1_find_tag(card->ctx, rbuf, rbuflen, 0x53, &bodylen); /* Pass the outer wrapper asn1 */
if (body != NULL && bodylen != 0) {
fascn = sc_asn1_find_tag(card->ctx, body, bodylen, 0x30, &fascnlen); /* Find the FASC-N data */
guid = sc_asn1_find_tag(card->ctx, body, bodylen, 0x34, &guidlen);
gbits = 0; /* if guid is valid, gbits will not be zero */
if (guid && guidlen == 16) {
for (i = 0; i < 16; i++) {
gbits = gbits | guid[i]; /* if all are zero, gbits will be zero */
}
}
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"fascn=%p,fascnlen=%d,guid=%p,guidlen=%d,gbits=%2.2x\n",
fascn, fascnlen, guid, guidlen, gbits);
if (fascn && fascnlen == 25) {
/* test if guid and the fascn starts with ;9999 (in ISO 4bit + partiy code) */
if (!(gbits && fascn[0] == 0xD4 && fascn[1] == 0xE7
&& fascn[2] == 0x39 && (fascn[3] | 0x7F) == 0xFF)) {
serial->len = fascnlen < SC_MAX_SERIALNR ? fascnlen : SC_MAX_SERIALNR;
memcpy (serial->value, fascn, serial->len);
r = SC_SUCCESS;
gbits = 0; /* set to skip using guid below */
}
}
if (guid && gbits) {
serial->len = guidlen < SC_MAX_SERIALNR ? guidlen : SC_MAX_SERIALNR;
memcpy (serial->value, guid, serial->len);
r = SC_SUCCESS;
}
}
}
card->serialnr = *serial;
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
/*
* If the object can not be present on the card, because the History
* object is not present or the History object says its not present,
* return 1. If object may be present return 0.
* Cuts down on overhead, by not showing non existent objects to pkcs11
* The path for the object is passed in and the first 2 bytes are used.
* Note: If the History or Discovery object is not found the
* PIV_OBJ_CACHE_NOT_PRESENT is set, as older cards do not have these.
* pkcs15-piv.c calls this via cardctl.
*/
static int piv_is_object_present(sc_card_t *card, u8 *ptr)
{
piv_private_data_t * priv = PIV_DATA(card);
int r = 0;
int enumtag;
enumtag = piv_find_obj_by_containerid(card, ptr);
if (enumtag >= 0 && priv->obj_cache[enumtag].flags & PIV_OBJ_CACHE_NOT_PRESENT)
r = 1;
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
/*
* NIST 800-73-3 allows the default pin to be the PIV application 0x80
* or the global pin for the card 0x00. Look at Discovery object to get this.
* called by pkcs15-piv.c via cardctl when setting up the pins.
*/
static int piv_get_pin_preference(sc_card_t *card, int *ptr)
{
piv_private_data_t * priv = PIV_DATA(card);
*ptr = priv->pin_preference;
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_SUCCESS);
}
static int piv_card_ctl(sc_card_t *card, unsigned long cmd, void *ptr)
{
piv_private_data_t * priv = PIV_DATA(card);
u8 * opts; /* A or M, key_ref, alg_id */
LOG_FUNC_CALLED(card->ctx);
sc_log(card->ctx, "cmd=%ld ptr=%p", cmd, ptr);
if (priv == NULL) {
LOG_FUNC_RETURN(card->ctx, SC_ERROR_INTERNAL);
}
switch(cmd) {
case SC_CARDCTL_PIV_AUTHENTICATE:
opts = (u8 *)ptr;
switch (*opts) {
case 'A':
return piv_general_external_authenticate(card,
*(opts+1), *(opts+2));
break;
case'M':
return piv_general_mutual_authenticate(card,
*(opts+1), *(opts+2));
break;
}
break;
case SC_CARDCTL_PIV_GENERATE_KEY:
return piv_generate_key(card,
(sc_cardctl_piv_genkey_info_t *) ptr);
break;
case SC_CARDCTL_GET_SERIALNR:
return piv_get_serial_nr_from_CHUI(card, (sc_serial_number_t *) ptr);
break;
case SC_CARDCTL_PIV_PIN_PREFERENCE:
return piv_get_pin_preference(card, ptr);
break;
case SC_CARDCTL_PIV_OBJECT_PRESENT:
return piv_is_object_present(card, ptr);
break;
}
LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_SUPPORTED);
}
static int piv_get_challenge(sc_card_t *card, u8 *rnd, size_t len)
{
u8 sbuf[16];
u8 *rbuf = NULL;
size_t rbuflen = 0;
u8 *p, *q;
int r;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"challenge len=%d",len);
sc_lock(card);
p = sbuf;
*p++ = 0x7c;
*p++ = 0x02;
*p++ = 0x81;
*p++ = 0x00;
/* assuming 8 byte response ? */
/* should take what the card returns */
while (len > 0) {
size_t n = len > 8 ? 8 : len;
/* NIST 800-73-3 says use 9B, previous verisons used 00 */
r = piv_general_io(card, 0x87, 0x00, 0x9B, sbuf, p - sbuf,
&rbuf, &rbuflen);
if (r < 0) {
sc_unlock(card);
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
q = rbuf;
if ( (*q++ != 0x7C)
|| (*q++ != rbuflen - 2)
|| (*q++ != 0x81)
|| (*q++ != rbuflen - 4)) {
r = SC_ERROR_INVALID_DATA;
sc_unlock(card);
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
memcpy(rnd, q, n);
len -= n;
rnd += n;
free(rbuf);
rbuf = NULL;
}
sc_unlock(card);
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, 0);
}
static int piv_set_security_env(sc_card_t *card,
const sc_security_env_t *env,
int se_num)
{
piv_private_data_t * priv = PIV_DATA(card);
int r = 0;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"flags=%08x op=%d alg=%d algf=%08x algr=%08x kr0=%02x, krfl=%d\n",
env->flags, env->operation, env->algorithm, env->algorithm_flags,
env->algorithm_ref, env->key_ref[0], env->key_ref_len);
priv->operation = env->operation;
priv->algorithm = env->algorithm;
if (env->algorithm == SC_ALGORITHM_RSA) {
priv->alg_id = 0x06; /* Say it is RSA, set 5, 6, 7 later */
} else if (env->algorithm == SC_ALGORITHM_EC) {
if (env->flags & SC_SEC_ENV_ALG_REF_PRESENT) {
switch (env->algorithm_ref) {
case 256:
priv->alg_id = 0x11; /* Say it is EC 256 */
priv->key_size = 256;
break;
case 384:
priv->alg_id = 0x14;
priv->key_size = 384;
break;
default:
r = SC_ERROR_NO_CARD_SUPPORT;
}
} else
r = SC_ERROR_NO_CARD_SUPPORT;
} else
r = SC_ERROR_NO_CARD_SUPPORT;
priv->key_ref = env->key_ref[0];
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, r);
}
static int piv_restore_security_env(sc_card_t *card, int se_num)
{
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, 0);
}
static int piv_validate_general_authentication(sc_card_t *card,
const u8 * data, size_t datalen,
u8 * out, size_t outlen)
{
piv_private_data_t * priv = PIV_DATA(card);
int r;
u8 *p;
const u8 *tag;
size_t taglen;
const u8 *body;
size_t bodylen;
unsigned int real_alg_id;
u8 sbuf[4096]; /* needs work. for 3072 keys, needs 384+10 or so */
u8 *rbuf = NULL;
size_t rbuflen;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
/* should assume large send data */
p = sbuf;
put_tag_and_len(0x7c, (2 + put_tag_and_len(0, datalen, NULL)) , &p);
put_tag_and_len(0x82, 0, &p);
if (priv->operation == SC_SEC_OPERATION_DERIVE
&& priv->algorithm == SC_ALGORITHM_EC)
put_tag_and_len(0x85, datalen, &p);
else
put_tag_and_len(0x81, datalen, &p);
memcpy(p, data, datalen);
p += datalen;
/*
* alg_id=06 is a place holder for all RSA keys.
* Derive the real alg_id based on the size of the
* the data, as we are always using raw mode.
* Non RSA keys needs some work in thia area.
*/
real_alg_id = priv->alg_id;
if (priv->alg_id == 0x06) {
switch (datalen) {
case 128: real_alg_id = 0x06; break;
case 256: real_alg_id = 0x07; break;
case 384: real_alg_id = 0x05; break;
default:
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, SC_ERROR_NO_CARD_SUPPORT);
}
}
/* EC alg_id was already set */
r = piv_general_io(card, 0x87, real_alg_id, priv->key_ref,
sbuf, p - sbuf, &rbuf, &rbuflen);
if ( r >= 0) {
body = sc_asn1_find_tag(card->ctx, rbuf, rbuflen, 0x7c, &bodylen);
if (body) {
tag = sc_asn1_find_tag(card->ctx, body, bodylen, 0x82, &taglen);
if (tag) {
memcpy(out, tag, taglen);
r = taglen;
}
} else
r = SC_ERROR_INVALID_DATA;
}
if (rbuf)
free(rbuf);
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
static int piv_compute_signature(sc_card_t *card,
const u8 * data, size_t datalen,
u8 * out, size_t outlen)
{
piv_private_data_t * priv = PIV_DATA(card);
int r;
int i;
size_t nLen;
u8 rbuf[128]; /* For EC conversions 384 will fit */
size_t rbuflen = sizeof(rbuf);
const u8 * body;
size_t bodylen;
const u8 * tag;
size_t taglen;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
/* The PIV returns a DER SEQUENCE{INTEGER, INTEGER}
* Which may have leading 00 to force positive
* TODO: -DEE should check if PKCS15 want the same
* But PKCS11 just wants 2* filed_length in bytes
* So we have to strip out the integers
* if present and pad on left if too short.
*/
if (priv->alg_id == 0x11 || priv->alg_id == 0x14 ) {
nLen = (priv->key_size + 7) / 8;
if (outlen < 2*nLen) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL," output too small for EC signature %d < %d", outlen, 2*nLen);
r = SC_ERROR_INVALID_DATA;
goto err;
}
memset(out, 0, outlen);
r = piv_validate_general_authentication(card, data, datalen, rbuf, rbuflen);
if (r < 0)
goto err;
if ( r >= 0) {
body = sc_asn1_find_tag(card->ctx, rbuf, rbuflen, 0x30, &bodylen);
for (i = 0; i<2; i++) {
if (body) {
tag = sc_asn1_find_tag(card->ctx, body, bodylen, 0x02, &taglen);
if (tag) {
bodylen -= taglen - (tag - body);
body = tag + taglen;
if (taglen > nLen) { /* drop leading 00 if present */
if (*tag != 0x00) {
r = SC_ERROR_INVALID_DATA;
goto err;
}
tag++;
taglen--;
}
memcpy(out + nLen*i + nLen - taglen , tag, taglen);
} else {
r = SC_ERROR_INVALID_DATA;
goto err;
}
} else {
r = SC_ERROR_INVALID_DATA;
goto err;
}
}
r = 2 * nLen;
}
} else { /* RSA is all set */
r = piv_validate_general_authentication(card, data, datalen, out, outlen);
}
err:
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, r);
}
static int piv_decipher(sc_card_t *card,
const u8 * data, size_t datalen,
u8 * out, size_t outlen)
{
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_VERBOSE, piv_validate_general_authentication(card, data, datalen, out, outlen));
}
/*
* the PIV-II does not always support files, but we will simulate
* files and reading/writing using get/put_data
* The path is the containerID number
* We can use this to determine the type of data requested, like a cert
* or pub key.
* We only support write from the piv_tool with file_out==NULL
* All other requests should be to read.
* Only if file_out != null, will we read to get length.
*/
static int piv_select_file(sc_card_t *card, const sc_path_t *in_path,
sc_file_t **file_out)
{
piv_private_data_t * priv = PIV_DATA(card);
int r;
int i;
const u8 *path;
int pathlen;
sc_file_t *file = NULL;
u8 * rbuf = NULL;
size_t rbuflen = 0;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
path = in_path->value;
pathlen = in_path->len;
/* only support single EF in current application */
if (memcmp(path, "\x3F\x00", 2) == 0) {
if (pathlen == 2) {
r = piv_select_aid(card, piv_aids[0].value, piv_aids[0].len_short, NULL, NULL);
SC_TEST_RET(card->ctx, SC_LOG_DEBUG_NORMAL, r, "Cannot select PIV AID");
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
else if (pathlen > 2) {
path += 2;
pathlen -= 2;
}
}
i = piv_find_obj_by_containerid(card, path);
if (i < 0)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_FILE_NOT_FOUND);
/*
* pkcs15 will use a 2 byte path or a 4 byte path
* with cece added to path to request only the cert from the cert obj
* PIV "Container ID" is used as the path, and are two bytes long
*/
priv->return_only_cert = (pathlen == 4 && path[2] == 0xce && path[3] == 0xce);
priv->selected_obj = i;
priv->rwb_state = -1;
/* make it look like the file was found. */
/* We don't want to read it now unless we need the length */
if (file_out) {
/* we need to read it now, to get length into cache */
r = piv_get_cached_data(card, i, &rbuf, &rbuflen);
if (r < 0)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_FILE_NOT_FOUND);
/* get the cert or the pub key out and into the cache too */
if (priv->return_only_cert || piv_objects[i].flags & PIV_OBJECT_TYPE_PUBKEY) {
r = piv_cache_internal_data(card, i);
if (r < 0)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
file = sc_file_new();
if (file == NULL)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_OUT_OF_MEMORY);
file->path = *in_path;
/* this could be like the FCI */
file->type = SC_FILE_TYPE_DF;
file->shareable = 0;
file->ef_structure = 0;
if (priv->return_only_cert)
file->size = priv->obj_cache[i].internal_obj_len;
else
file->size = priv->obj_cache[i].obj_len;
file->id = (piv_objects[i].containerid[0]<<8) + piv_objects[i].containerid[1];
*file_out = file;
}
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, 0);
}
static int piv_process_discovery(sc_card_t *card)
{
piv_private_data_t * priv = PIV_DATA(card);
int r;
u8 * rbuf = NULL;
size_t rbuflen = 0;
const u8 * body;
size_t bodylen;
const u8 * aid;
size_t aidlen;
const u8 * pinp;
size_t pinplen;
unsigned int cla_out, tag_out;
r = piv_get_cached_data(card, PIV_OBJ_DISCOVERY, &rbuf, &rbuflen);
if (r <= 0) {
priv->obj_cache[PIV_OBJ_DISCOVERY].flags |= PIV_OBJ_CACHE_NOT_PRESENT;
/* Discovery object is only object that has 3 byte Lc= 50017E
* and pree 800-73-3 cards may treat this as a strange error.
* So treat any error as not present
*/
r = 0;
goto err;
}
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"Discovery = %p:%d",rbuf, rbuflen);
/* the object is now cached, see what we have */
if (rbuflen != 0) {
body = rbuf;
if ((r = sc_asn1_read_tag(&body, rbuflen, &cla_out, &tag_out, &bodylen)) != SC_SUCCESS) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"DER problem %d\n",r);
r = SC_ERROR_INVALID_ASN1_OBJECT;
goto err;
}
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"Discovery 0x%2.2x 0x%2.2x %p:%d",
cla_out, tag_out, body, bodylen);
if ( cla_out+tag_out == 0x7E && body != NULL && bodylen != 0) {
aidlen = 0;
aid = sc_asn1_find_tag(card->ctx, body, bodylen, 0x4F, &aidlen);
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"Discovery aid=%p:%d",aid,aidlen);
if (aid == NULL || aidlen < piv_aids[0].len_short ||
memcmp(aid,piv_aids[0].value,piv_aids[0].len_short) != 0) { /*TODO look at long */
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "Discovery object not PIV");
r = SC_SUCCESS; /* not an error could be some other appl */
goto err;
}
pinp = sc_asn1_find_tag(card->ctx, body, bodylen, 0x5F2F, &pinplen);
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"Discovery pinp=%p:%d",pinp,pinplen);
if (pinp && pinplen == 2) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"Discovery pinp flags=0x%2.2x 0x%2.2x",*pinp, *(pinp+1));
r = SC_SUCCESS;
if (*pinp == 0x60 && *(pinp+1) == 0x20) { /* use Global pin */
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "Pin Preference - Global");
priv->pin_preference = 0x00;
}
}
}
}
err:
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
/*
* The history object lists what retired keys and certs are on the card
* or listed in the offCardCertURL. The user may have read the offCardURL file,
* ahead of time, and if so will use it for the certs listed.
* TODO: -DEE
* If the offCardCertURL is not cached by the user, should we wget it here?
* Its may be out of scope to have OpenSC read the URL.
*/
static int piv_process_history(sc_card_t *card)
{
piv_private_data_t * priv = PIV_DATA(card);
int r;
int i;
int enumtag;
u8 * rbuf = NULL;
size_t rbuflen = 0;
const u8 * body;
size_t bodylen;
const u8 * num;
size_t numlen;
const u8 * url = NULL;
size_t urllen;
u8 * ocfhfbuf = NULL;
unsigned int cla_out, tag_out;
size_t ocfhflen;
const u8 * seq;
const u8 * seqtag;
size_t seqlen;
const u8 * keyref;
size_t keyreflen;
const u8 * cert;
size_t certlen;
size_t certobjlen, i2;
u8 * certobj;
u8 * cp;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
r = piv_get_cached_data(card, PIV_OBJ_HISTORY, &rbuf, &rbuflen);
if (r == SC_ERROR_FILE_NOT_FOUND)
r = 0; /* OK if not found */
if (r <= 0) {
priv->obj_cache[PIV_OBJ_HISTORY].flags |= PIV_OBJ_CACHE_NOT_PRESENT;
goto err; /* no file, must be pre 800-73-3 card and not on card */
}
/* the object is now cached, see what we have */
if (rbuflen != 0) {
body = rbuf;
if ((r = sc_asn1_read_tag(&body, rbuflen, &cla_out, &tag_out, &bodylen)) != SC_SUCCESS) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"DER problem %d\n",r);
r = SC_ERROR_INVALID_ASN1_OBJECT;
goto err;
}
if ( cla_out+tag_out == 0x53 && body != NULL && bodylen != 0) {
numlen = 0;
num = sc_asn1_find_tag(card->ctx, body, bodylen, 0xC1, &numlen);
if (num) {
if (numlen != 1 ||
*num > PIV_OBJ_RETIRED_X509_20-PIV_OBJ_RETIRED_X509_1+1) {
r = SC_ERROR_INTERNAL; /* TODO some other error */
goto err;
}
priv->keysWithOnCardCerts = *num;
}
numlen = 0;
num = sc_asn1_find_tag(card->ctx, body, bodylen, 0xC2, &numlen);
if (num) {
if (numlen != 1 ||
*num > PIV_OBJ_RETIRED_X509_20-PIV_OBJ_RETIRED_X509_1+1) {
r = SC_ERROR_INTERNAL; /* TODO some other error */
goto err;
}
priv->keysWithOffCardCerts = *num;
}
url = sc_asn1_find_tag(card->ctx, body, bodylen, 0xF3, &urllen);
if (url) {
priv->offCardCertURL = calloc(1,urllen+1);
if (priv->offCardCertURL == NULL)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_OUT_OF_MEMORY);
memcpy(priv->offCardCertURL, url, urllen);
}
} else {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"Problem with Histroy object\n");
goto err;
}
}
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "History on=%d off=%d URL=%s\n",
priv->keysWithOnCardCerts, priv->keysWithOffCardCerts,
priv->offCardCertURL ? priv->offCardCertURL:"NONE");
/* now mark what objects are on the card */
for (i=0; i<priv->keysWithOnCardCerts; i++) {
priv->obj_cache[PIV_OBJ_RETIRED_X509_1+i].flags &= ~PIV_OBJ_CACHE_NOT_PRESENT;
}
/*
* If user has gotten copy of the file from the offCardCertsURL,
* we will read in and add the certs to the cache as listed on
* the card. some of the certs may be on the card as well.
*
* Get file name from url. verify that the filename is valid
* The URL ends in a SHA1 string. We will use this as the filename
* in the directory used for the PKCS15 cache
*/
r = 0;
if (priv->offCardCertURL) {
char * fp;
char filename[PATH_MAX];
if (strncmp("http://", priv->offCardCertURL, 7)) {
r = SC_ERROR_INVALID_DATA;
goto err;
}
/* find the last / so we have the filename part */
fp = strrchr(priv->offCardCertURL + 7,'/');
if (fp == NULL) {
r = SC_ERROR_INVALID_DATA;
goto err;
}
fp++;
/* Use the same directory as used for other OpenSC cached items */
r = sc_get_cache_dir(card->ctx, filename,
sizeof(filename) - strlen(fp) - 2);
if (r != SC_SUCCESS)
goto err;
#ifdef _WIN32
strcat(filename,"\\");
#else
strcat(filename,"/");
#endif
strcat(filename,fp);
r = piv_read_obj_from_file(card, filename,
&ocfhfbuf, &ocfhflen);
if (r == SC_ERROR_FILE_NOT_FOUND) {
r = 0;
goto err;
}
/*
* Its a seq of seq of a key ref and cert
*/
body = ocfhfbuf;
if (sc_asn1_read_tag(&body, ocfhflen, &cla_out,
&tag_out, &bodylen) != SC_SUCCESS ||
cla_out+tag_out != 0x30) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "DER problem\n");
r = SC_ERROR_INVALID_ASN1_OBJECT;
goto err;
}
seq = body;
while (bodylen > 0) {
seqtag = seq;
if (sc_asn1_read_tag(&seq, bodylen, &cla_out,
&tag_out, &seqlen) != SC_SUCCESS ||
cla_out+tag_out != 0x30) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"DER problem\n");
r = SC_ERROR_INVALID_ASN1_OBJECT;
goto err;
}
keyref = sc_asn1_find_tag(card->ctx,
seq, seqlen, 0x04, &keyreflen);
if (!keyref || keyreflen != 1 ||
(*keyref < 0x82 && *keyref > 0x95)) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"DER problem\n");
r = SC_ERROR_INVALID_ASN1_OBJECT;
goto err;
}
cert = keyref + keyreflen;
certlen = seqlen - (cert - seq);
enumtag = PIV_OBJ_RETIRED_X509_1 + *keyref - 0x82;
/* now add the cert like another object */
i2 = put_tag_and_len(0x70,certlen, NULL)
+ put_tag_and_len(0x71, 1, NULL)
+ put_tag_and_len(0xFE, 0, NULL);
certobjlen = put_tag_and_len(0x53, i2, NULL);
certobj = malloc(certobjlen);
if (certobj == NULL) {
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
cp = certobj;
put_tag_and_len(0x53, i2, &cp);
put_tag_and_len(0x70,certlen, &cp);
memcpy(cp, cert, certlen);
cp += certlen;
put_tag_and_len(0x71, 1,&cp);
*cp++ = 0x00;
put_tag_and_len(0xFE, 0, &cp);
priv->obj_cache[enumtag].obj_data = certobj;
priv->obj_cache[enumtag].obj_len = certobjlen;
priv->obj_cache[enumtag].flags |= PIV_OBJ_CACHE_VALID;
priv->obj_cache[enumtag].flags &= ~PIV_OBJ_CACHE_NOT_PRESENT;
r = piv_cache_internal_data(card, enumtag);
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "got internal r=%d\n",r);
certobj = NULL;
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,
"Added from off card file #%d %p:%d 0x%02X \n",
enumtag,
priv->obj_cache[enumtag].obj_data,
priv->obj_cache[enumtag].obj_len, *keyref);
bodylen -= (seqlen + seq - seqtag);
seq += seqlen;
}
}
err:
if (ocfhfbuf)
free(ocfhfbuf);
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
static int piv_finish(sc_card_t *card)
{
piv_private_data_t * priv = PIV_DATA(card);
int i;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
if (priv) {
if (priv->aid_file)
sc_file_free(priv->aid_file);
if (priv->w_buf)
free(priv->w_buf);
if (priv->offCardCertURL)
free(priv->offCardCertURL);
for (i = 0; i < PIV_OBJ_LAST_ENUM - 1; i++) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL,"DEE freeing #%d, 0x%02x %p:%d %p:%d", i,
priv->obj_cache[i].flags,
priv->obj_cache[i].obj_data, priv->obj_cache[i].obj_len,
priv->obj_cache[i].internal_obj_data, priv->obj_cache[i].internal_obj_len);
if (priv->obj_cache[i].obj_data)
free(priv->obj_cache[i].obj_data);
if (priv->obj_cache[i].internal_obj_data)
free(priv->obj_cache[i].internal_obj_data);
}
free(priv);
}
return 0;
}
static int piv_match_card(sc_card_t *card)
{
int i;
sc_file_t aidfile;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
/* Since we send an APDU, the card's logout function may be called...
* however it may be in dirty memory */
card->ops->logout = NULL;
/* Detect by selecting applet */
i = !(piv_find_aid(card, &aidfile));
return i; /* never match */
}
static int piv_init(sc_card_t *card)
{
int r, i;
unsigned long flags;
unsigned long ext_flags;
piv_private_data_t *priv;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
priv = calloc(1, sizeof(piv_private_data_t));
if (!priv)
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, SC_ERROR_OUT_OF_MEMORY);
priv->aid_file = sc_file_new();
priv->selected_obj = -1;
priv->pin_preference = 0x80; /* 800-73-3 part 1, table 3 */
/* Some objects will only be present if Histroy object says so */
for (i=0; i < PIV_OBJ_LAST_ENUM -1; i++) {
if(piv_objects[i].flags & PIV_OBJECT_NOT_PRESENT)
priv->obj_cache[i].flags |= PIV_OBJ_CACHE_NOT_PRESENT;
}
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "Max send = %d recv = %d\n",
card->max_send_size, card->max_recv_size);
card->drv_data = priv;
card->cla = 0x00;
card->name = "PIV-II card";
r = piv_find_aid(card, priv->aid_file);
if (r < 0) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "Failed to initialize %s\n", card->name);
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
priv->enumtag = piv_aids[r].enumtag;
card->type = piv_aids[r].enumtag;
/* PKCS#11 may try to generate session keys, and get confused
* if SC_ALGORITHM_ONBOARD_KEY_GEN is present
* piv-tool can still do this, just don't tell PKCS#11
*/
flags = SC_ALGORITHM_RSA_RAW;
_sc_card_add_rsa_alg(card, 1024, flags, 0); /* manditory */
_sc_card_add_rsa_alg(card, 2048, flags, 0); /* optional */
_sc_card_add_rsa_alg(card, 3072, flags, 0); /* optional */
flags = SC_ALGORITHM_ECDSA_RAW;
ext_flags = SC_ALGORITHM_EXT_EC_NAMEDCURVE | SC_ALGORITHM_EXT_EC_UNCOMPRESES;
_sc_card_add_ec_alg(card, 256, flags, ext_flags);
_sc_card_add_ec_alg(card, 384, flags, ext_flags);
card->caps |= SC_CARD_CAP_RNG;
/*
* 800-73-3 cards may have a history object and/or a discovery object
* We want to process them now as this has information on what
* keys and certs the card has and how the pin might be used.
*/
r = piv_process_history(card);
r = piv_process_discovery(card);
if (r > 0)
r = 0;
SC_FUNC_RETURN(card->ctx, SC_LOG_DEBUG_NORMAL, r);
}
static int piv_pin_cmd(sc_card_t *card, struct sc_pin_cmd_data *data,
int *tries_left)
{
/* Extra validation of (new) PIN during a PIN change request, to
* ensure it's not outside the FIPS 201 4.1.6.1 (numeric only) and
* FIPS 140-2 (6 character minimum) requirements.
*/
struct sc_card_driver *iso_drv = sc_get_iso7816_driver();
if (data->cmd == SC_PIN_CMD_CHANGE) {
int i = 0;
if (data->pin2.len < 6) {
return SC_ERROR_INVALID_PIN_LENGTH;
}
for(i=0; i < data->pin2.len; ++i) {
if (!isdigit(data->pin2.data[i])) {
return SC_ERROR_INVALID_DATA;
}
}
}
return iso_drv->ops->pin_cmd(card, data, tries_left);
}
static struct sc_card_driver * sc_get_driver(void)
{
struct sc_card_driver *iso_drv = sc_get_iso7816_driver();
piv_ops = *iso_drv->ops;
piv_ops.match_card = piv_match_card;
piv_ops.init = piv_init;
piv_ops.finish = piv_finish;
piv_ops.select_file = piv_select_file; /* must use get/put, could emulate? */
piv_ops.get_challenge = piv_get_challenge;
piv_ops.read_binary = piv_read_binary;
piv_ops.write_binary = piv_write_binary;
piv_ops.set_security_env = piv_set_security_env;
piv_ops.restore_security_env = piv_restore_security_env;
piv_ops.compute_signature = piv_compute_signature;
piv_ops.decipher = piv_decipher;
piv_ops.card_ctl = piv_card_ctl;
piv_ops.pin_cmd = piv_pin_cmd;
return &piv_drv;
}
#if 1
struct sc_card_driver * sc_get_piv_driver(void)
{
return sc_get_driver();
}
#endif
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