diff options
| -rw-r--r-- | src/mir_core/src/sha1.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/mir_core/src/sha1.cpp b/src/mir_core/src/sha1.cpp index 5e82a3ce5b..b31e640657 100644 --- a/src/mir_core/src/sha1.cpp +++ b/src/mir_core/src/sha1.cpp @@ -173,8 +173,10 @@ MIR_CORE_DLL(void) mir_hmac_sha1(BYTE hashout[MIR_SHA1_HASH_SIZE], const BYTE *k memcpy(k_ipad, key, keylen);
memcpy(k_opad, key, keylen);
- memset(k_ipad+keylen, 0x36, SHA_BLOCKSIZE - keylen);
- memset(k_opad+keylen, 0x5c, SHA_BLOCKSIZE - keylen);
+ if (keylen < SHA_BLOCKSIZE) {
+ memset(k_ipad + keylen, 0x36, SHA_BLOCKSIZE - keylen);
+ memset(k_opad + keylen, 0x5c, SHA_BLOCKSIZE - keylen);
+ }
for (unsigned i = 0; i < keylen; i++) {
k_ipad[i] ^= 0x36;
|