diff options
Diffstat (limited to 'third_party/bearssl/src/ssl_scert_single_rsa.c')
| -rw-r--r-- | third_party/bearssl/src/ssl_scert_single_rsa.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/third_party/bearssl/src/ssl_scert_single_rsa.c b/third_party/bearssl/src/ssl_scert_single_rsa.c new file mode 100644 index 0000000..b2c7767 --- /dev/null +++ b/third_party/bearssl/src/ssl_scert_single_rsa.c @@ -0,0 +1,162 @@ +/* + * Copyright (c) 2016 Thomas Pornin <[email protected]> + * + * 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 int +sr_choose(const br_ssl_server_policy_class **pctx, + const br_ssl_server_context *cc, + br_ssl_server_choices *choices) +{ + br_ssl_server_policy_rsa_context *pc; + const br_suite_translated *st; + size_t u, st_num; + unsigned hash_id; + int fh; + + pc = (br_ssl_server_policy_rsa_context *)pctx; + st = br_ssl_server_get_client_suites(cc, &st_num); + if (cc->eng.session.version < BR_TLS12) { + hash_id = 0; + fh = 1; + } else { + hash_id = br_ssl_choose_hash( + br_ssl_server_get_client_hashes(cc)); + fh = (hash_id != 0); + } + choices->chain = pc->chain; + choices->chain_len = pc->chain_len; + for (u = 0; u < st_num; u ++) { + unsigned tt; + + tt = st[u][1]; + switch (tt >> 12) { + case BR_SSLKEYX_RSA: + if ((pc->allowed_usages & BR_KEYTYPE_KEYX) != 0) { + choices->cipher_suite = st[u][0]; + return 1; + } + break; + case BR_SSLKEYX_ECDHE_RSA: + if ((pc->allowed_usages & BR_KEYTYPE_SIGN) != 0 && fh) { + choices->cipher_suite = st[u][0]; + choices->algo_id = hash_id + 0xFF00; + return 1; + } + break; + } + } + return 0; +} + +static uint32_t +sr_do_keyx(const br_ssl_server_policy_class **pctx, + unsigned char *data, size_t *len) +{ + br_ssl_server_policy_rsa_context *pc; + + pc = (br_ssl_server_policy_rsa_context *)pctx; + return br_rsa_ssl_decrypt(pc->irsacore, pc->sk, data, *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 +sr_do_sign(const br_ssl_server_policy_class **pctx, + unsigned algo_id, unsigned char *data, size_t hv_len, size_t len) +{ + br_ssl_server_policy_rsa_context *pc; + unsigned char hv[64]; + size_t sig_len; + const unsigned char *hash_oid; + + pc = (br_ssl_server_policy_rsa_context *)pctx; + memcpy(hv, data, hv_len); + algo_id &= 0xFF; + if (algo_id == 0) { + hash_oid = NULL; + } else if (algo_id >= 2 && algo_id <= 6) { + hash_oid = HASH_OID[algo_id - 2]; + } else { + return 0; + } + sig_len = (pc->sk->n_bitlen + 7) >> 3; + if (len < sig_len) { + return 0; + } + return pc->irsasign(hash_oid, hv, hv_len, pc->sk, data) ? sig_len : 0; +} + +static const br_ssl_server_policy_class sr_policy_vtable = { + sizeof(br_ssl_server_policy_rsa_context), + sr_choose, + sr_do_keyx, + sr_do_sign +}; + +/* see bearssl_ssl.h */ +void +br_ssl_server_set_single_rsa(br_ssl_server_context *cc, + const br_x509_certificate *chain, size_t chain_len, + const br_rsa_private_key *sk, unsigned allowed_usages, + br_rsa_private irsacore, br_rsa_pkcs1_sign irsasign) +{ + cc->chain_handler.single_rsa.vtable = &sr_policy_vtable; + cc->chain_handler.single_rsa.chain = chain; + cc->chain_handler.single_rsa.chain_len = chain_len; + cc->chain_handler.single_rsa.sk = sk; + cc->chain_handler.single_rsa.allowed_usages = allowed_usages; + cc->chain_handler.single_rsa.irsacore = irsacore; + cc->chain_handler.single_rsa.irsasign = irsasign; + cc->policy_vtable = &cc->chain_handler.single_rsa.vtable; +} |