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scram: renamed BLOCK_SIZE

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BLOCK_SIZE is too common name, so remove it to HMAC_BLOCK_SIZE.
This commit is contained in:
Dmitry Podgorny
2015-10-15 00:11:09 +03:00
parent c156e13791
commit 0994022066
1 changed files with 8 additions and 12 deletions
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20
src/scram.c
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@@ -24,11 +24,7 @@
#include "scram.h"
/* block size for HMAC */
#define BLOCK_SIZE 64
#if BLOCK_SIZE < SHA1_DIGEST_SIZE
#error BLOCK_SIZE must not be less than SHA1_DIGEST_SIZE
#endif
#define HMAC_BLOCK_SIZE 64
static const uint8_t ipad = 0x36;
static const uint8_t opad = 0x5C;
@@ -37,33 +33,33 @@ static void crypto_HMAC_SHA1(const uint8_t *key, size_t key_len,
const uint8_t *text, size_t len,
uint8_t *digest)
{
uint8_t key_pad[BLOCK_SIZE];
uint8_t key_ipad[BLOCK_SIZE];
uint8_t key_opad[BLOCK_SIZE];
uint8_t key_pad[HMAC_BLOCK_SIZE];
uint8_t key_ipad[HMAC_BLOCK_SIZE];
uint8_t key_opad[HMAC_BLOCK_SIZE];
uint8_t sha_digest[SHA1_DIGEST_SIZE];
int i;
SHA1_CTX ctx;
memset(key_pad, 0, sizeof(key_pad));
if (key_len <= BLOCK_SIZE) {
if (key_len <= HMAC_BLOCK_SIZE) {
memcpy(key_pad, key, key_len);
} else {
/* according to RFC2104 */
crypto_SHA1(key, key_len, key_pad);
}
for (i = 0; i < BLOCK_SIZE; i++) {
for (i = 0; i < HMAC_BLOCK_SIZE; i++) {
key_ipad[i] = key_pad[i] ^ ipad;
key_opad[i] = key_pad[i] ^ opad;
}
crypto_SHA1_Init(&ctx);
crypto_SHA1_Update(&ctx, key_ipad, BLOCK_SIZE);
crypto_SHA1_Update(&ctx, key_ipad, HMAC_BLOCK_SIZE);
crypto_SHA1_Update(&ctx, text, len);
crypto_SHA1_Final(&ctx, sha_digest);
crypto_SHA1_Init(&ctx);
crypto_SHA1_Update(&ctx, key_opad, BLOCK_SIZE);
crypto_SHA1_Update(&ctx, key_opad, HMAC_BLOCK_SIZE);
crypto_SHA1_Update(&ctx, sha_digest, SHA1_DIGEST_SIZE);
crypto_SHA1_Final(&ctx, digest);
}