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25146f0397cdbfaa58381a578939444ee9b89f84
vsmartcard/ccid/src/pace.c
frankmorgner e02e2abdfb - dropped pace_transmit_apdu in favour of a solution with sm_transmit_apdu. 
post_transmit and pre_transmit can be used to perform actions before
  encrypting/decrypting a sm apdu (such as incrementing the ssc for pace).
- fixed ssc problems. encrypted communication with more than one apdu (e.g.
  resuming the pin) is now working.
- fixed uninitialized pointer in sm_decrypt


git-svn-id: https://vsmartcard.svn.sourceforge.net/svnroot/vsmartcard@131 96b47cad-a561-4643-ad3b-153ac7d7599c
2010-06-05 14:34:50 +00:00

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/*
* Copyright (C) 2010 Frank Morgner
*
* This file is part of ccid.
*
* ccid is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* ccid 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 General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* ccid. If not, see <http://www.gnu.org/licenses/>.
*/
#include "pace.h"
#include "sm.h"
#include "scutil.h"
#include <asm/byteorder.h>
#include <opensc/asn1.h>
#include <opensc/log.h>
#include <opensc/opensc.h>
#include <opensc/ui.h>
#include <openssl/asn1t.h>
#include <openssl/buffer.h>
#include <openssl/err.h>
#include <openssl/objects.h>
#include <openssl/pace.h>
#include <string.h>
#define ASN1_APP_IMP_OPT(stname, field, type, tag) ASN1_EX_TYPE(ASN1_TFLG_IMPTAG|ASN1_TFLG_APPLICATION|ASN1_TFLG_OPTIONAL, tag, stname, field, type)
/*
* MSE:Set AT
*/
typedef struct pace_mse_set_at_cd_st {
ASN1_OBJECT *cryptographic_mechanism_reference;
ASN1_INTEGER *key_reference1;
ASN1_INTEGER *key_reference2;
ASN1_OCTET_STRING *auxiliary_data;
ASN1_OCTET_STRING *eph_pub_key;
ASN1_OCTET_STRING *cha_template;
} PACE_MSE_SET_AT_C;
ASN1_SEQUENCE(PACE_MSE_SET_AT_C) = {
/* 0x80
* Cryptographic mechanism reference */
ASN1_IMP_OPT(PACE_MSE_SET_AT_C, cryptographic_mechanism_reference, ASN1_OBJECT, 0),
/* 0x83
* Reference of a public key / secret key */
ASN1_IMP_OPT(PACE_MSE_SET_AT_C, key_reference1, ASN1_INTEGER, 3),
/* 0x84
* Reference of a private key / Reference for computing a session key */
ASN1_IMP_OPT(PACE_MSE_SET_AT_C, key_reference2, ASN1_INTEGER, 4),
/* 0x67
* Auxiliary authenticated data */
ASN1_APP_IMP_OPT(PACE_MSE_SET_AT_C, auxiliary_data, ASN1_OCTET_STRING, 7),
/* 0x91
* Ephemeral Public Key */
ASN1_IMP_OPT(PACE_MSE_SET_AT_C, eph_pub_key, ASN1_OCTET_STRING, 0x11),
/* 0x7F4C
* Certificate Holder Authorization Template */
ASN1_APP_IMP_OPT(PACE_MSE_SET_AT_C, cha_template, ASN1_OCTET_STRING, 0x4c),
} ASN1_SEQUENCE_END(PACE_MSE_SET_AT_C)
IMPLEMENT_ASN1_FUNCTIONS(PACE_MSE_SET_AT_C)
/*
* General Authenticate
*/
/* Protocol Command Data */
typedef struct pace_gen_auth_cd_st {
ASN1_OCTET_STRING *mapping_data;
ASN1_OCTET_STRING *eph_pub_key;
ASN1_OCTET_STRING *auth_token;
} PACE_GEN_AUTH_C_BODY;
ASN1_SEQUENCE(PACE_GEN_AUTH_C_BODY) = {
/* 0x81
* Mapping Data */
ASN1_IMP_OPT(PACE_GEN_AUTH_C_BODY, mapping_data, ASN1_OCTET_STRING, 1),
/* 0x83
* Ephemeral Public Key */
ASN1_IMP_OPT(PACE_GEN_AUTH_C_BODY, eph_pub_key, ASN1_OCTET_STRING, 3),
/* 0x85
* Authentication Token */
ASN1_IMP_OPT(PACE_GEN_AUTH_C_BODY, auth_token, ASN1_OCTET_STRING, 5),
} ASN1_SEQUENCE_END(PACE_GEN_AUTH_C_BODY)
IMPLEMENT_ASN1_FUNCTIONS(PACE_GEN_AUTH_C_BODY)
typedef PACE_GEN_AUTH_C_BODY PACE_GEN_AUTH_C;
/* 0x7C
* Dynamic Authentication Data */
ASN1_ITEM_TEMPLATE(PACE_GEN_AUTH_C) =
ASN1_EX_TEMPLATE_TYPE(
ASN1_TFLG_IMPTAG|ASN1_TFLG_APPLICATION,
0x1c, PACE_GEN_AUTH_C, PACE_GEN_AUTH_C_BODY)
ASN1_ITEM_TEMPLATE_END(PACE_GEN_AUTH_C)
IMPLEMENT_ASN1_FUNCTIONS(PACE_GEN_AUTH_C)
/* Protocol Response Data */
typedef struct pace_gen_auth_rapdu_body_st {
ASN1_OCTET_STRING *enc_nonce;
ASN1_OCTET_STRING *mapping_data;
ASN1_OCTET_STRING *eph_pub_key;
ASN1_OCTET_STRING *auth_token;
ASN1_OCTET_STRING *cert_auth1;
ASN1_OCTET_STRING *cert_auth2;
} PACE_GEN_AUTH_R_BODY;
ASN1_SEQUENCE(PACE_GEN_AUTH_R_BODY) = {
/* 0x80
* Encrypted Nonce */
ASN1_IMP_OPT(PACE_GEN_AUTH_R_BODY, enc_nonce, ASN1_OCTET_STRING, 0),
/* 0x82
* Mapping Data */
ASN1_IMP_OPT(PACE_GEN_AUTH_R_BODY, mapping_data, ASN1_OCTET_STRING, 2),
/* 0x84
* Ephemeral Public Key */
ASN1_IMP_OPT(PACE_GEN_AUTH_R_BODY, eph_pub_key, ASN1_OCTET_STRING, 4),
/* 0x86
* Authentication Token */
ASN1_IMP_OPT(PACE_GEN_AUTH_R_BODY, auth_token, ASN1_OCTET_STRING, 6),
/* 0x87
* Certification Authority Reference */
ASN1_IMP_OPT(PACE_GEN_AUTH_R_BODY, cert_auth1, ASN1_OCTET_STRING, 7),
/* 0x88
* Certification Authority Reference */
ASN1_IMP_OPT(PACE_GEN_AUTH_R_BODY, cert_auth2, ASN1_OCTET_STRING, 8),
} ASN1_SEQUENCE_END(PACE_GEN_AUTH_R_BODY)
IMPLEMENT_ASN1_FUNCTIONS(PACE_GEN_AUTH_R_BODY)
typedef PACE_GEN_AUTH_R_BODY PACE_GEN_AUTH_R;
/* 0x7C
* Dynamic Authentication Data */
ASN1_ITEM_TEMPLATE(PACE_GEN_AUTH_R) =
ASN1_EX_TEMPLATE_TYPE(
ASN1_TFLG_IMPTAG|ASN1_TFLG_APPLICATION,
0x1c, PACE_GEN_AUTH_R, PACE_GEN_AUTH_R_BODY)
ASN1_ITEM_TEMPLATE_END(PACE_GEN_AUTH_R)
IMPLEMENT_ASN1_FUNCTIONS(PACE_GEN_AUTH_R)
const size_t maxresp = SC_MAX_APDU_BUFFER_SIZE - 2;
int GetReadersPACECapabilities(sc_card_t *card,
const __u8 *in, __u8 **out, size_t *outlen) {
if (!out || !outlen)
SC_FUNC_RETURN(card->ctx, SC_LOG_TYPE_DEBUG, SC_ERROR_INVALID_ARGUMENTS);
__u8 *result = realloc(*out, 2);
if (!result)
SC_FUNC_RETURN(card->ctx, SC_LOG_TYPE_DEBUG, SC_ERROR_OUT_OF_MEMORY);
*out = result;
*outlen = 2;
/* lengthBitMap */
*result = 1;
result++;
/* BitMap */
*result = PACE_BITMAP_PACE|PACE_BITMAP_EID;
SC_FUNC_RETURN(card->ctx, SC_LOG_TYPE_DEBUG, SC_SUCCESS);
}
/** select and read EF.CardAccess */
static int get_ef_card_access(sc_card_t *card,
__u8 **ef_cardaccess, size_t *length_ef_cardaccess)
{
int r;
/* we read less bytes than possible. this is a workaround for acr 122,
* which only supports apdus of max 250 bytes */
size_t read = maxresp - 8;
sc_path_t path;
sc_file_t *file = NULL;
__u8 *p;
memset(&path, 0, sizeof path);
r = sc_append_file_id(&path, FID_EF_CARDACCESS);
if (r < 0) {
sc_error(card->ctx, "Could not create path object.");
goto err;
}
r = sc_concatenate_path(&path, sc_get_mf_path(), &path);
if (r < 0) {
sc_error(card->ctx, "Could not create path object.");
goto err;
}
r = sc_select_file(card, &path, &file);
if (r < 0) {
sc_error(card->ctx, "Could not select EF.CardAccess.");
goto err;
}
*length_ef_cardaccess = 0;
while(1) {
p = realloc(*ef_cardaccess, *length_ef_cardaccess + read);
if (!p) {
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
*ef_cardaccess = p;
r = sc_read_binary(card, *length_ef_cardaccess,
*ef_cardaccess + *length_ef_cardaccess, read, 0);
if (r > 0 && r != read) {
*length_ef_cardaccess += r;
break;
}
if (r < 0) {
sc_error(card->ctx, "Could not read EF.CardAccess.");
goto err;
}
*length_ef_cardaccess += r;
}
/* test cards only return an empty FCI template,
* so we can't determine any file proberties */
if (*length_ef_cardaccess < file->size) {
r = SC_ERROR_FILE_TOO_SMALL;
goto err;
}
r = SC_SUCCESS;
err:
if (file) {
free(file);
}
SC_FUNC_RETURN(card->ctx, SC_LOG_TYPE_DEBUG, r);
}
static int pace_mse_set_at(const struct sm_ctx *oldpacectx, sc_card_t *card,
int protocol, int secret_key, int reference, u8 *sw1, u8 *sw2)
{
sc_apdu_t apdu;
unsigned char *d = NULL;
PACE_MSE_SET_AT_C *data = NULL;
int r, tries;
if (!sw1 || !sw2) {
r = SC_ERROR_INVALID_ARGUMENTS;
goto err;
}
memset(&apdu, 0, sizeof apdu);
apdu.ins = 0x22;
apdu.p1 = 0xc1;
apdu.p2 = 0xa4;
apdu.cse = SC_APDU_CASE_3_SHORT;
apdu.flags = SC_APDU_FLAGS_NO_GET_RESP|SC_APDU_FLAGS_NO_RETRY_WL;
data = PACE_MSE_SET_AT_C_new();
if (!data) {
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
data->cryptographic_mechanism_reference = OBJ_nid2obj(protocol);
data->key_reference1 = ASN1_INTEGER_new();
//data->key_reference2 = ASN1_INTEGER_new();
if (!data->cryptographic_mechanism_reference
|| !data->key_reference1
//|| !data->key_reference2
) {
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
if (!ASN1_INTEGER_set(data->key_reference1, secret_key)
//|| !ASN1_INTEGER_set(data->key_reference2, reference)
) {
r = SC_ERROR_INTERNAL;
goto err;
}
r = i2d_PACE_MSE_SET_AT_C(data, &d);
if (r < 0) {
r = SC_ERROR_INTERNAL;
goto err;
}
/* The tag/length for the sequence (0x30) is omitted in the command apdu. */
/* FIXME is there a OpenSSL way to get the value only or even a define for
* the tag? */
apdu.data = sc_asn1_find_tag(card->ctx, d, r, 0x30, &apdu.datalen);
apdu.lc = apdu.datalen;
if (card->ctx->debug > SC_LOG_TYPE_DEBUG)
bin_log(card->ctx, "MSE:Set AT command data", apdu.data, apdu.datalen);
if (oldpacectx)
r = sm_transmit_apdu(oldpacectx, card, &apdu);
else
r = sc_transmit_apdu(card, &apdu);
if (r < 0)
goto err;
if (apdu.resplen) {
sc_error(card->ctx, "MSE:Set AT response data should be empty");
r = SC_ERROR_UNKNOWN_DATA_RECEIVED;
goto err;
}
*sw1 = apdu.sw1;
*sw2 = apdu.sw2;
if (apdu.sw1 == 0x63) {
if ((apdu.sw2 & 0xc0) == 0xc0) {
tries = apdu.sw2 & 0x0f;
if (tries <= 1) {
/* this is only a warning... */
sc_error(card->ctx, "Remaining tries: %d (%s must be %s)\n",
tries, pace_secret_name(secret_key),
tries ? "resumed" : "unblocked");
}
r = SC_SUCCESS;
} else {
sc_error(card->ctx, "Unknown status bytes: SW1=%02X, SW2=%02X\n",
apdu.sw1, apdu.sw2);
r = SC_ERROR_CARD_CMD_FAILED;
goto err;
}
} else if (apdu.sw1 == 0x62 && apdu.sw2 == 0x83) {
sc_error(card->ctx, "Password is deactivated\n");
r = SC_ERROR_AUTH_METHOD_BLOCKED;
goto err;
} else {
r = sc_check_sw(card, apdu.sw1, apdu.sw2);
}
err:
if (apdu.resp)
free(apdu.resp);
if (data) {
// XXX
//if (data->cryptographic_mechanism_reference)
//ASN1_OBJECT_free(data->cryptographic_mechanism_reference);
//if (data->key_reference1)
//ASN1_INTEGER_free(data->key_reference1);
//if (data->key_reference2)
//ASN1_INTEGER_free(data->key_reference2);
PACE_MSE_SET_AT_C_free(data);
}
if (d)
free(d);
SC_FUNC_RETURN(card->ctx, SC_LOG_TYPE_DEBUG, r);
}
static int pace_gen_auth(const struct sm_ctx *oldpacectx, sc_card_t *card,
int step, const u8 *in, size_t in_len, u8 **out, size_t *out_len)
{
sc_apdu_t apdu;
PACE_GEN_AUTH_C *c_data = NULL;
PACE_GEN_AUTH_R *r_data = NULL;
unsigned char *d = NULL, *p;
int r, l;
memset(&apdu, 0, sizeof apdu);
apdu.cla = 0x10;
apdu.ins = 0x86;
apdu.cse = SC_APDU_CASE_4_SHORT;
apdu.flags = SC_APDU_FLAGS_NO_GET_RESP|SC_APDU_FLAGS_NO_RETRY_WL;
c_data = PACE_GEN_AUTH_C_new();
if (!c_data) {
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
switch (step) {
case 1:
break;
case 2:
c_data->mapping_data = ASN1_OCTET_STRING_new();
if (!c_data->mapping_data
|| !M_ASN1_OCTET_STRING_set(
c_data->mapping_data, in, in_len)) {
r = SC_ERROR_INTERNAL;
goto err;
}
break;
case 3:
c_data->eph_pub_key = ASN1_OCTET_STRING_new();
if (!c_data->eph_pub_key
|| !M_ASN1_OCTET_STRING_set(
c_data->eph_pub_key, in, in_len)) {
r = SC_ERROR_INTERNAL;
goto err;
}
break;
case 4:
apdu.cla = 0;
c_data->auth_token = ASN1_OCTET_STRING_new();
if (!c_data->auth_token
|| !M_ASN1_OCTET_STRING_set(
c_data->auth_token, in, in_len)) {
r = SC_ERROR_INTERNAL;
goto err;
}
break;
default:
r = SC_ERROR_INVALID_ARGUMENTS;
goto err;
}
r = i2d_PACE_GEN_AUTH_C(c_data, &d);
if (r < 0) {
r = SC_ERROR_INTERNAL;
goto err;
}
apdu.data = (const u8 *) d;
apdu.datalen = r;
apdu.lc = r;
if (card->ctx->debug > SC_LOG_TYPE_DEBUG)
bin_log(card->ctx, "General authenticate command data", apdu.data, apdu.datalen);
apdu.resplen = maxresp;
apdu.resp = malloc(apdu.resplen);
if (oldpacectx)
r = sm_transmit_apdu(oldpacectx, card, &apdu);
else
r = sc_transmit_apdu(card, &apdu);
if (r < 0)
goto err;
r = sc_check_sw(card, apdu.sw1, apdu.sw2);
if (r < 0)
goto err;
if (card->ctx->debug > SC_LOG_TYPE_DEBUG)
bin_log(card->ctx, "General authenticate response data", apdu.resp, apdu.resplen);
if (!d2i_PACE_GEN_AUTH_R(&r_data,
(const unsigned char **) &apdu.resp, apdu.resplen)) {
sc_error(card->ctx, "Could not parse general authenticate response data.");
r = SC_ERROR_INTERNAL;
goto err;
}
switch (step) {
case 1:
if (!r_data->enc_nonce
|| r_data->mapping_data
|| r_data->eph_pub_key
|| r_data->auth_token) {
sc_error(card->ctx, "Response data of general authenticate for "
"step %d should (only) contain the "
"encrypted nonce.", step);
r = SC_ERROR_UNKNOWN_DATA_RECEIVED;
goto err;
}
p = r_data->enc_nonce->data;
l = r_data->enc_nonce->length;
break;
case 2:
if (r_data->enc_nonce
|| !r_data->mapping_data
|| r_data->eph_pub_key
|| r_data->auth_token) {
sc_error(card->ctx, "Response data of general authenticate for "
"step %d should (only) contain the "
"mapping data.", step);
r = SC_ERROR_UNKNOWN_DATA_RECEIVED;
goto err;
}
p = r_data->mapping_data->data;
l = r_data->mapping_data->length;
break;
case 3:
if (r_data->enc_nonce
|| r_data->mapping_data
|| !r_data->eph_pub_key
|| r_data->auth_token) {
sc_error(card->ctx, "Response data of general authenticate for "
"step %d should (only) contain the "
"ephemeral public key.", step);
r = SC_ERROR_UNKNOWN_DATA_RECEIVED;
goto err;
}
p = r_data->eph_pub_key->data;
l = r_data->eph_pub_key->length;
break;
case 4:
if (r_data->enc_nonce
|| r_data->mapping_data
|| r_data->eph_pub_key
|| !r_data->auth_token) {
sc_error(card->ctx, "Response data of general authenticate for "
"step %d should (only) contain the "
"authentication token.", step);
r = SC_ERROR_UNKNOWN_DATA_RECEIVED;
goto err;
}
p = r_data->auth_token->data;
l = r_data->auth_token->length;
break;
default:
r = SC_ERROR_INVALID_ARGUMENTS;
goto err;
}
*out = malloc(l);
if (!*out) {
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
memcpy(*out, p, l);
*out_len = l;
err:
if (c_data) {
/* FIXME
if (c_data->mapping_data)
ASN1_OCTET_STRING_free(c_data->mapping_data);
if (c_data->eph_pub_key)
ASN1_OCTET_STRING_free(c_data->eph_pub_key);
if (c_data->auth_token)
ASN1_OCTET_STRING_free(c_data->auth_token);*/
PACE_GEN_AUTH_C_free(c_data);
}
if (d)
free(d);
if (r_data) {
/* FIXME
if (r_data->mapping_data)
ASN1_OCTET_STRING_free(r_data->mapping_data);
if (r_data->eph_pub_key)
ASN1_OCTET_STRING_free(r_data->eph_pub_key);
if (r_data->auth_token)
ASN1_OCTET_STRING_free(r_data->auth_token);*/
PACE_GEN_AUTH_R_free(r_data);
}
/* XXX */
/*if (apdu.resp)*/
/*free(apdu.resp);*/
SC_FUNC_RETURN(card->ctx, SC_LOG_TYPE_DEBUG, r);
}
int
pace_reset_retry_counter(struct sm_ctx *ctx, sc_card_t *card,
enum s_type pin_id, int ask_for_secret,
const char *new, size_t new_len)
{
sc_apdu_t apdu;
sc_ui_hints_t hints;
char *p = NULL;
int r;
if (ask_for_secret && (!new || !new_len)) {
memset(&hints, 0, sizeof(hints));
hints.dialog_name = "ccid.PACE";
hints.card = card;
hints.prompt = NULL;
hints.obj_label = pace_secret_name(PACE_PIN);
hints.usage = SC_UI_USAGE_NEW_PIN;
r = sc_ui_get_pin(&hints, &p);
if (r < 0) {
sc_error(card->ctx, "Could not read new %s (%s).\n",
hints.obj_label, sc_strerror(r));
SC_FUNC_RETURN(card->ctx, SC_LOG_TYPE_ERROR, r);
}
new_len = strlen(p);
new = p;
}
memset(&apdu, 0, sizeof apdu);
apdu.ins = 0x2C;
apdu.p2 = pin_id;
apdu.data = (u8 *) new;
apdu.datalen = new_len;
apdu.lc = apdu.datalen;
apdu.flags = SC_APDU_FLAGS_NO_GET_RESP|SC_APDU_FLAGS_NO_RETRY_WL;
if (new_len) {
apdu.p1 = 0x02;
apdu.cse = SC_APDU_CASE_3_SHORT;
} else {
apdu.p1 = 0x03;
apdu.cse = SC_APDU_CASE_1;
}
r = sm_transmit_apdu(ctx, card, &apdu);
if (p) {
OPENSSL_cleanse(p, new_len);
free(p);
}
SC_FUNC_RETURN(card->ctx, SC_LOG_TYPE_ERROR, r);
}
static PACE_SEC *
get_psec(sc_card_t *card, const char *pin, size_t length_pin, enum s_type pin_id)
{
sc_ui_hints_t hints;
char *p = NULL;
PACE_SEC *r;
int sc_result;
if (!length_pin || !pin) {
memset(&hints, 0, sizeof(hints));
hints.dialog_name = "ccid.PACE";
hints.card = card;
hints.prompt = NULL;
hints.obj_label = pace_secret_name(pin_id);
hints.usage = SC_UI_USAGE_OTHER;
sc_result = sc_ui_get_pin(&hints, &p);
if (sc_result < 0) {
sc_error(card->ctx, "Could not read %s (%s).\n",
pace_secret_name(pin_id), sc_strerror(sc_result));
return NULL;
}
length_pin = strlen(p);
pin = p;
}
r = PACE_SEC_new(pin, length_pin, pin_id);
if (p) {
OPENSSL_cleanse(p, length_pin);
free(p);
}
return r;
}
void debug_ossl(sc_context_t *ctx) {
unsigned long r;
for (r = ERR_get_error(); r; r = ERR_get_error()) {
sc_error(ctx, ERR_error_string(r, NULL));
}
}
int EstablishPACEChannel(const struct sm_ctx *oldpacectx, sc_card_t *card,
const __u8 *in, __u8 **out, size_t *outlen, struct sm_ctx *sctx)
{
__u8 pin_id;
size_t length_chat, length_pin, length_cert_desc, length_ef_cardaccess;
const __u8 *chat, *pin, *certificate_description;
__u8 *ef_cardaccess = NULL;
PACEInfo *info = NULL;
__le16 word;
PACEDomainParameterInfo *static_dp = NULL, *eph_dp = NULL;
BUF_MEM *enc_nonce = NULL, *nonce = NULL, *mdata = NULL, *mdata_opp = NULL,
*k_enc = NULL, *k_mac = NULL, *token_opp = NULL,
*token = NULL, *pub = NULL, *pub_opp = NULL, *key = NULL;
PACE_SEC *sec = NULL;
PACE_CTX *pctx = NULL;
int r, second_execution;
if (!card)
return SC_ERROR_INVALID_ARGUMENTS;
if (!in || !out || !outlen)
SC_FUNC_RETURN(card->ctx, SC_LOG_TYPE_DEBUG, SC_ERROR_INVALID_ARGUMENTS);
pin_id = *in;
in++;
length_chat = *in;
in++;
chat = in;
in += length_chat;
length_pin = *in;
in++;
pin = in;
in += length_pin;
memcpy(&word, in, sizeof word);
length_cert_desc = __le16_to_cpu(word);
in += sizeof word;
certificate_description = in;
if (!*out) {
second_execution = 0;
r = get_ef_card_access(card, &ef_cardaccess, &length_ef_cardaccess);
if (r < 0) {
sc_error(card->ctx, "Could not get EF.CardAccess.");
goto err;
}
*out = malloc(6 + length_ef_cardaccess);
if (!*out) {
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
word = __cpu_to_le16(length_ef_cardaccess);
memcpy(*out + 2, &word, sizeof word);
memcpy(*out + 4, ef_cardaccess, length_ef_cardaccess);
/* XXX CAR */
/*(*out)[length_ef_cardaccess + 2] = 0;*/
/* XXX CARprev */
/*(*out)[length_ef_cardaccess + 3] = 0;*/
} else {
second_execution = 1;
memcpy(&word, *out + 2, sizeof word);
length_ef_cardaccess = __le16_to_cpu(word);
ef_cardaccess = *out + 4;
}
bin_log(card->ctx, "EF.CardAccess", ef_cardaccess, length_ef_cardaccess);
if (!parse_ef_card_access(ef_cardaccess, length_ef_cardaccess,
&info, &static_dp)) {
r = SC_ERROR_INTERNAL;
debug_ossl(card->ctx);
sc_error(card->ctx, "Could not parse EF.CardAccess.");
goto err;
}
r = pace_mse_set_at(oldpacectx, card, info->protocol, pin_id, 1, *out, *out+1);
if (r < 0) {
sc_error(card->ctx, "Could not select protocol proberties "
"(MSE: Set AT).");
goto err;
}
enc_nonce = BUF_MEM_new();
if (!enc_nonce) {
r = SC_ERROR_INTERNAL;
debug_ossl(card->ctx);
goto err;
}
r = pace_gen_auth(oldpacectx, card, 1, NULL, 0, (u8 **) &enc_nonce->data,
&enc_nonce->length);
if (r < 0) {
sc_error(card->ctx, "Could not get encrypted nonce from card "
"(General Authenticate step 1 failed).");
goto err;
}
if (card->ctx->debug >= SC_LOG_TYPE_DEBUG)
bin_log(card->ctx, "Encrypted nonce from MRTD", (u8 *)enc_nonce->data, enc_nonce->length);
enc_nonce->max = enc_nonce->length;
sec = get_psec(card, (char *) pin, length_pin, pin_id);
if (!sec) {
r = SC_ERROR_INTERNAL;
debug_ossl(card->ctx);
goto err;
}
pctx = PACE_CTX_new();
if (!pctx || !PACE_CTX_init(pctx, info)) {
r = SC_ERROR_INTERNAL;
debug_ossl(card->ctx);
goto err;
}
pctx->tr_version = PACE_TR_VERSION_2_01;
nonce = PACE_STEP2_dec_nonce(sec, enc_nonce, pctx);
mdata_opp = BUF_MEM_new();
mdata = PACE_STEP3A_generate_mapping_data(static_dp, pctx);
if (!nonce || !mdata || !mdata_opp) {
r = SC_ERROR_INTERNAL;
debug_ossl(card->ctx);
goto err;
}
r = pace_gen_auth(oldpacectx, card, 2, (u8 *) mdata->data, mdata->length,
(u8 **) &mdata_opp->data, &mdata_opp->length);
if (r < 0) {
sc_error(card->ctx, "Could not exchange mapping data with card "
"(General Authenticate step 2 failed).");
goto err;
}
mdata_opp->max = mdata_opp->length;
if (card->ctx->debug >= SC_LOG_TYPE_DEBUG)
bin_log(card->ctx, "Mapping data from MRTD", (u8 *) mdata_opp->data, mdata_opp->length);
eph_dp = PACE_STEP3A_map_dp(static_dp, pctx, nonce, mdata_opp);
pub = PACE_STEP3B_generate_ephemeral_key(eph_dp, pctx);
pub_opp = BUF_MEM_new();
if (!eph_dp || !pub || !pub_opp) {
r = SC_ERROR_INTERNAL;
debug_ossl(card->ctx);
goto err;
}
r = pace_gen_auth(oldpacectx, card, 3, (u8 *) pub->data, pub->length,
(u8 **) &pub_opp->data, &pub_opp->length);
if (r < 0) {
sc_error(card->ctx, "Could not exchange ephemeral public key with card "
"(General Authenticate step 3 failed).");
goto err;
}
pub_opp->max = pub_opp->length;
if (card->ctx->debug >= SC_LOG_TYPE_DEBUG)
bin_log(card->ctx, "Ephemeral public key from MRTD", (u8 *) pub_opp->data, pub_opp->length);
key = PACE_STEP3B_compute_ephemeral_key(eph_dp, pctx, pub_opp);
if (!key ||
!PACE_STEP3C_derive_keys(key, pctx, info, &k_mac, &k_enc)) {
r = SC_ERROR_INTERNAL;
debug_ossl(card->ctx);
goto err;
}
token = PACE_STEP3D_compute_authentication_token(pctx,
eph_dp, info, pub_opp, k_mac);
token_opp = BUF_MEM_new();
if (!token || !token_opp) {
r = SC_ERROR_INTERNAL;
debug_ossl(card->ctx);
goto err;
}
r = pace_gen_auth(oldpacectx, card, 4, (u8 *) token->data, token->length,
(u8 **) &token_opp->data, &token_opp->length);
if (r < 0) {
sc_error(card->ctx, "Could not exchange authentication token with card "
"(General Authenticate step 4 failed).");
goto err;
}
token_opp->max = token_opp->length;
if (!PACE_STEP3D_verify_authentication_token(pctx,
eph_dp, info, k_mac, token_opp)) {
r = SC_ERROR_INTERNAL;
debug_ossl(card->ctx);
goto err;
}
/* XXX parse CHAT to check role of terminal */
sctx->authentication_ctx = pace_sm_ctx_create(k_mac,
k_enc, pctx);
if (!sctx->authentication_ctx) {
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
sctx->cipher_ctx = sctx->authentication_ctx;
sctx->authenticate = pace_sm_authenticate;
sctx->encrypt = pace_sm_encrypt;
sctx->decrypt = pace_sm_decrypt;
sctx->verify_authentication = pace_sm_verify_authentication;
sctx->pre_transmit = pace_sm_pre_transmit;
sctx->post_transmit = pace_sm_post_transmit;
sctx->padding_indicator = SM_ISO_PADDING;
sctx->block_length = EVP_CIPHER_block_size(pctx->cipher);
r = reset_ssc(sctx->authentication_ctx);
err:
if (ef_cardaccess && !second_execution)
free(ef_cardaccess);
if (info)
PACEInfo_free(info);
if (static_dp)
PACEDomainParameterInfo_clear_free(static_dp);
if (eph_dp)
PACEDomainParameterInfo_clear_free(eph_dp);
if (enc_nonce)
BUF_MEM_free(enc_nonce);
if (nonce) {
OPENSSL_cleanse(nonce->data, nonce->length);
BUF_MEM_free(nonce);
}
if (mdata)
BUF_MEM_free(mdata);
if (mdata_opp)
BUF_MEM_free(mdata_opp);
if (token_opp)
BUF_MEM_free(token_opp);
if (token)
BUF_MEM_free(token);
if (pub)
BUF_MEM_free(pub);
if (pub_opp)
BUF_MEM_free(pub_opp);
if (key) {
OPENSSL_cleanse(key->data, key->length);
BUF_MEM_free(key);
}
if (sec)
PACE_SEC_clean_free(sec);
if (r < 0) {
if (k_enc) {
OPENSSL_cleanse(k_enc->data, k_enc->length);
BUF_MEM_free(k_enc);
}
if (k_mac) {
OPENSSL_cleanse(k_mac->data, k_mac->length);
BUF_MEM_free(k_mac);
}
if (pctx)
PACE_CTX_clear_free(pctx);
if (sctx->authentication_ctx)
pace_sm_ctx_free(sctx->authentication_ctx);
}
SC_FUNC_RETURN(card->ctx, SC_LOG_TYPE_DEBUG, r);
}
static const char *MRZ_name = "MRZ";
static const char *PIN_name = "PIN";
static const char *PUK_name = "PUK";
static const char *CAN_name = "CAN";
static const char *UNDEF_name = "UNDEF";
const char *pace_secret_name(enum s_type pin_id) {
switch (pin_id) {
case PACE_MRZ:
return MRZ_name;
case PACE_PUK:
return PUK_name;
case PACE_PIN:
return PIN_name;
case PACE_CAN:
return CAN_name;
default:
return UNDEF_name;
}
}
int
increment_ssc(struct pace_sm_ctx *psmctx)
{
if (!psmctx)
return SC_ERROR_INVALID_ARGUMENTS;
BN_add_word(psmctx->ssc, 1);
return SC_SUCCESS;
}
int
decrement_ssc(struct pace_sm_ctx *psmctx)
{
if (!psmctx)
return SC_ERROR_INVALID_ARGUMENTS;
BN_sub_word(psmctx->ssc, 1);
return SC_SUCCESS;
}
int
reset_ssc(struct pace_sm_ctx *psmctx)
{
if (!psmctx)
return SC_ERROR_INVALID_ARGUMENTS;
BN_zero(psmctx->ssc);
return SC_SUCCESS;
}
int pace_sm_encrypt(sc_card_t *card, const struct sm_ctx *ctx,
const u8 *data, size_t datalen, u8 **enc)
{
BUF_MEM *encbuf = NULL, *databuf = NULL;
u8 *p = NULL;
int r;
if (!ctx || !enc || !ctx->cipher_ctx) {
r = SC_ERROR_INVALID_ARGUMENTS;
goto err;
}
struct pace_sm_ctx *psmctx = ctx->cipher_ctx;
databuf = BUF_MEM_create_init(data, datalen);
encbuf = PACE_encrypt(psmctx->ctx, psmctx->ssc, psmctx->key_enc, databuf);
if (!databuf || !encbuf) {
r = SC_ERROR_INTERNAL;
goto err;
}
if (!encbuf) {
r = SC_ERROR_INTERNAL;
goto err;
}
p = realloc(*enc, encbuf->length);
if (!p) {
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
*enc = p;
memcpy(*enc, encbuf->data, encbuf->length);
r = encbuf->length;
err:
if (databuf) {
OPENSSL_cleanse(databuf->data, databuf->max);
BUF_MEM_free(databuf);
}
if (encbuf)
BUF_MEM_free(encbuf);
SC_FUNC_RETURN(card->ctx, SC_LOG_TYPE_ERROR, r);
}
int pace_sm_decrypt(sc_card_t *card, const struct sm_ctx *ctx,
const u8 *enc, size_t enclen, u8 **data)
{
BUF_MEM *encbuf = NULL, *databuf = NULL;
u8 *p = NULL;
int r;
if (!ctx || !enc || !ctx->cipher_ctx || !data) {
r = SC_ERROR_INVALID_ARGUMENTS;
goto err;
}
struct pace_sm_ctx *psmctx = ctx->cipher_ctx;
encbuf = BUF_MEM_create_init(enc, enclen);
databuf = PACE_decrypt(psmctx->ctx, psmctx->ssc, psmctx->key_enc, encbuf);
if (!encbuf || !databuf) {
r = SC_ERROR_INTERNAL;
goto err;
}
p = realloc(*data, databuf->length);
if (!p) {
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
*data = p;
memcpy(*data, databuf->data, databuf->length);
r = databuf->length;
err:
if (databuf) {
OPENSSL_cleanse(databuf->data, databuf->max);
BUF_MEM_free(databuf);
}
if (encbuf)
BUF_MEM_free(encbuf);
SC_FUNC_RETURN(card->ctx, SC_LOG_TYPE_ERROR, r);
}
int pace_sm_authenticate(sc_card_t *card, const struct sm_ctx *ctx,
const u8 *data, size_t datalen, u8 **macdata)
{
BUF_MEM *macbuf = NULL;
u8 *p = NULL, *ssc = NULL;
int r;
if (!ctx || !ctx->cipher_ctx || !macdata) {
r = SC_ERROR_INVALID_ARGUMENTS;
goto err;
}
struct pace_sm_ctx *psmctx = ctx->cipher_ctx;
macbuf = PACE_authenticate(psmctx->ctx, psmctx->ssc, psmctx->key_mac,
data, datalen);
if (!macbuf) {
sc_error(card->ctx, "Could not get MAC\n");
r = SC_ERROR_INTERNAL;
goto err;
}
p = realloc(*macdata, macbuf->length);
if (!p) {
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
*macdata = p;
memcpy(*macdata, macbuf->data, macbuf->length);
r = macbuf->length;
err:
if (macbuf)
BUF_MEM_free(macbuf);
if (ssc)
free(ssc);
SC_FUNC_RETURN(card->ctx, SC_LOG_TYPE_ERROR, r);
}
int pace_sm_verify_authentication(sc_card_t *card, const struct sm_ctx *ctx,
const u8 *mac, size_t maclen,
const u8 *macdata, size_t macdatalen)
{
int r;
char *p;
BUF_MEM *my_mac = NULL;
if (!ctx || !ctx->cipher_ctx) {
r = SC_ERROR_INVALID_ARGUMENTS;
goto err;
}
struct pace_sm_ctx *psmctx = ctx->cipher_ctx;
my_mac = PACE_authenticate(psmctx->ctx, psmctx->ssc, psmctx->key_mac,
macdata, macdatalen);
if (!my_mac) {
r = SC_ERROR_INTERNAL;
goto err;
}
if (my_mac->length != maclen ||
memcmp(my_mac->data, mac, maclen) != 0) {
r = SC_ERROR_OBJECT_NOT_VALID;
sc_error(card->ctx, "Authentication data not verified");
goto err;
}
if (card->ctx->debug > SC_LOG_TYPE_DEBUG)
sc_debug(card->ctx, "Authentication data verified");
r = SC_SUCCESS;
err:
if (my_mac)
BUF_MEM_free(my_mac);
SC_FUNC_RETURN(card->ctx, SC_LOG_TYPE_ERROR, r);
}
int pace_sm_pre_transmit(sc_card_t *card, const struct sm_ctx *ctx,
sc_apdu_t *apdu)
{
SC_FUNC_RETURN(card->ctx, SC_LOG_TYPE_DEBUG,
increment_ssc(ctx->cipher_ctx));
}
int pace_sm_post_transmit(sc_card_t *card, const struct sm_ctx *ctx,
sc_apdu_t *sm_apdu)
{
SC_FUNC_RETURN(card->ctx, SC_LOG_TYPE_DEBUG,
increment_ssc(ctx->cipher_ctx));
}
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