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/*
* Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "inner.h"
static void
cc_none0(const br_ssl_client_certificate_class **pctx)
{
(void)pctx;
}
static void
cc_none1(const br_ssl_client_certificate_class **pctx, size_t len)
{
(void)pctx;
(void)len;
}
static void
cc_none2(const br_ssl_client_certificate_class **pctx,
const unsigned char *data, size_t len)
{
(void)pctx;
(void)data;
(void)len;
}
static void
cc_choose(const br_ssl_client_certificate_class **pctx,
const br_ssl_client_context *cc, uint32_t auth_types,
br_ssl_client_certificate *choices)
{
br_ssl_client_certificate_rsa_context *zc;
int x;
(void)cc;
zc = (br_ssl_client_certificate_rsa_context *)pctx;
x = br_ssl_choose_hash((unsigned)auth_types);
if (x == 0 && (auth_types & 1) == 0) {
memset(choices, 0, sizeof *choices);
}
choices->auth_type = BR_AUTH_RSA;
choices->hash_id = x;
choices->chain = zc->chain;
choices->chain_len = zc->chain_len;
}
/*
* OID for hash functions in RSA signatures.
*/
static const unsigned char HASH_OID_SHA1[] = {
0x05, 0x2B, 0x0E, 0x03, 0x02, 0x1A
};
static const unsigned char HASH_OID_SHA224[] = {
0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04
};
static const unsigned char HASH_OID_SHA256[] = {
0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01
};
static const unsigned char HASH_OID_SHA384[] = {
0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02
};
static const unsigned char HASH_OID_SHA512[] = {
0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03
};
static const unsigned char *HASH_OID[] = {
HASH_OID_SHA1,
HASH_OID_SHA224,
HASH_OID_SHA256,
HASH_OID_SHA384,
HASH_OID_SHA512
};
static size_t
cc_do_sign(const br_ssl_client_certificate_class **pctx,
int hash_id, size_t hv_len, unsigned char *data, size_t len)
{
br_ssl_client_certificate_rsa_context *zc;
unsigned char hv[64];
const unsigned char *hash_oid;
size_t sig_len;
zc = (br_ssl_client_certificate_rsa_context *)pctx;
memcpy(hv, data, hv_len);
if (hash_id == 0) {
hash_oid = NULL;
} else if (hash_id >= 2 && hash_id <= 6) {
hash_oid = HASH_OID[hash_id - 2];
} else {
return 0;
}
sig_len = (zc->sk->n_bitlen + 7) >> 3;
if (len < sig_len) {
return 0;
}
return zc->irsasign(hash_oid, hv, hv_len, zc->sk, data) ? sig_len : 0;
}
static const br_ssl_client_certificate_class ccert_vtable = {
sizeof(br_ssl_client_certificate_rsa_context),
cc_none0, /* start_name_list */
cc_none1, /* start_name */
cc_none2, /* append_name */
cc_none0, /* end_name */
cc_none0, /* end_name_list */
cc_choose,
0,
cc_do_sign
};
/* see bearssl_ssl.h */
void
br_ssl_client_set_single_rsa(br_ssl_client_context *cc,
const br_x509_certificate *chain, size_t chain_len,
const br_rsa_private_key *sk, br_rsa_pkcs1_sign irsasign)
{
cc->client_auth.single_rsa.vtable = &ccert_vtable;
cc->client_auth.single_rsa.chain = chain;
cc->client_auth.single_rsa.chain_len = chain_len;
cc->client_auth.single_rsa.sk = sk;
cc->client_auth.single_rsa.irsasign = irsasign;
cc->client_auth_vtable = &cc->client_auth.single_rsa.vtable;
}
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