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head/contrib/bearssl/src/ec/ecdsa_i15_vrfy_asn1.c
| Property | Old Value | New Value |
|---|---|---|
| svn:eol-style | null | native \ No newline at end of property |
| svn:keywords | null | FreeBSD=%H \ No newline at end of property |
| svn:mime-type | null | text/plain \ No newline at end of property |
| /* | |||||
| * Copyright (c) 2017 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" | |||||
| #define FIELD_LEN ((BR_MAX_EC_SIZE + 7) >> 3) | |||||
| /* see bearssl_ec.h */ | |||||
| uint32_t | |||||
| br_ecdsa_i15_vrfy_asn1(const br_ec_impl *impl, | |||||
| const void *hash, size_t hash_len, | |||||
| const br_ec_public_key *pk, | |||||
| const void *sig, size_t sig_len) | |||||
| { | |||||
| /* | |||||
| * We use a double-sized buffer because a malformed ASN.1 signature | |||||
| * may trigger a size expansion when converting to "raw" format. | |||||
| */ | |||||
| unsigned char rsig[(FIELD_LEN << 2) + 24]; | |||||
| if (sig_len > ((sizeof rsig) >> 1)) { | |||||
| return 0; | |||||
| } | |||||
| memcpy(rsig, sig, sig_len); | |||||
| sig_len = br_ecdsa_asn1_to_raw(rsig, sig_len); | |||||
| return br_ecdsa_i15_vrfy_raw(impl, hash, hash_len, pk, rsig, sig_len); | |||||
| } | |||||