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comparison pkcs_1_v15_es_decode.c @ 143:5d99163f7e32 libtomcrypt-orig

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import of libtomcrypt 0.99
author Matt Johnston <matt@ucc.asn.au>
date Sun, 19 Dec 2004 11:34:45 +0000
parents 6362d3854bb4
children
comparison
equal deleted inserted replaced
15:6362d3854bb4 143:5d99163f7e32
26 _ARGCHK(res != NULL); 26 _ARGCHK(res != NULL);
27 27
28 /* default to failed */ 28 /* default to failed */
29 *res = 0; 29 *res = 0;
30 30
31 /* must be at least 12 bytes long */ 31 modulus_bytelen = (modulus_bitlen>>3) + (modulus_bitlen & 7 ? 1 : 0);
32 if (msglen < 12) { 32
33 /* must be at least modulus_bytelen bytes long */
34 if (msglen != modulus_bytelen) {
33 return CRYPT_INVALID_ARG; 35 return CRYPT_INVALID_ARG;
34 } 36 }
35
36 modulus_bytelen = (modulus_bitlen>>3) + (modulus_bitlen & 7 ? 1 : 0);
37 37
38 /* should start with 0x00 0x02 */ 38 /* should start with 0x00 0x02 */
39 if (msg[0] != 0x00 || msg[1] != 0x02) { 39 if (msg[0] != 0x00 || msg[1] != 0x02) {
40 return CRYPT_OK; 40 return CRYPT_OK;
41 } 41 }
50 50
51 /* the message is left */ 51 /* the message is left */
52 if (x + outlen > modulus_bytelen) { 52 if (x + outlen > modulus_bytelen) {
53 return CRYPT_PK_INVALID_SIZE; 53 return CRYPT_PK_INVALID_SIZE;
54 } 54 }
55 memcpy(out, msg + x, outlen); 55 XMEMCPY(out, msg + x, outlen);
56 *res = 1; 56 *res = 1;
57 return CRYPT_OK; 57 return CRYPT_OK;
58 } 58 }
59 59
60 #endif 60 #endif