diff options
Diffstat (limited to 'crypto/hmac_win.cc')
| -rw-r--r-- | crypto/hmac_win.cc | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/crypto/hmac_win.cc b/crypto/hmac_win.cc index 3522bed..9109429 100644 --- a/crypto/hmac_win.cc +++ b/crypto/hmac_win.cc @@ -43,7 +43,8 @@ void ComputeHMACSHA256(const unsigned char* key, size_t key_len, memset(key0 + SHA256_LENGTH, 0, SHA256_BLOCK_SIZE - SHA256_LENGTH); } else { memcpy(key0, key, key_len); - memset(key0 + key_len, 0, SHA256_BLOCK_SIZE - key_len); + if (key_len < SHA256_BLOCK_SIZE) + memset(key0 + key_len, 0, SHA256_BLOCK_SIZE - key_len); } unsigned char padded_key[SHA256_BLOCK_SIZE]; |