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core: Fix handling of digest size argument for all HMAC hash functions

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This commit is contained in:
Marcel Holtmann 2014-12-28 06:33:44 +01:00
parent 04efa8fd0b
commit 016f701a91
3 changed files with 21 additions and 15 deletions
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10
src/md5.c
View File

@ -32,8 +32,9 @@
#define MD5_MAC_LEN 16
static void __hmac_md5(struct l_checksum *checksum,
const void *key, size_t key_len,
const void *data, size_t data_len, void *output)
const void *key, size_t key_len,
const void *data, size_t data_len,
void *output, size_t size)
{
unsigned char ipad[64];
unsigned char opad[64];
@ -73,7 +74,8 @@ static void __hmac_md5(struct l_checksum *checksum,
/* perform outer MD5 */
l_checksum_update(checksum, opad, sizeof(opad));
l_checksum_update(checksum, digest, MD5_MAC_LEN);
l_checksum_get_digest(checksum, output, MD5_MAC_LEN);
l_checksum_get_digest(checksum, output,
size > MD5_MAC_LEN ? MD5_MAC_LEN : size);
l_checksum_reset(checksum);
}
@ -85,7 +87,7 @@ bool hmac_md5(const void *key, size_t key_len,
checksum = l_checksum_new(L_CHECKSUM_MD5);
__hmac_md5(checksum, key, key_len, data, data_len, output);
__hmac_md5(checksum, key, key_len, data, data_len, output, size);
l_checksum_free(checksum);

16
src/sha1.c
View File

@ -32,8 +32,9 @@
#define SHA1_MAC_LEN 20
static void __hmac_sha1(struct l_checksum *checksum,
const void *key, size_t key_len,
const void *data, size_t data_len, void *output)
const void *key, size_t key_len,
const void *data, size_t data_len,
void *output, size_t size)
{
unsigned char ipad[64];
unsigned char opad[64];
@ -73,7 +74,8 @@ static void __hmac_sha1(struct l_checksum *checksum,
/* perform outer SHA1 */
l_checksum_update(checksum, opad, sizeof(opad));
l_checksum_update(checksum, digest, SHA1_MAC_LEN);
l_checksum_get_digest(checksum, output, SHA1_MAC_LEN);
l_checksum_get_digest(checksum, output,
size > SHA1_MAC_LEN ? SHA1_MAC_LEN : size);
l_checksum_reset(checksum);
}
@ -85,7 +87,7 @@ bool hmac_sha1(const void *key, size_t key_len,
checksum = l_checksum_new(L_CHECKSUM_SHA1);
__hmac_sha1(checksum, key, key_len, data, data_len, output);
__hmac_sha1(checksum, key, key_len, data, data_len, output, size);
l_checksum_free(checksum);
@ -110,12 +112,12 @@ static void F(struct l_checksum *checksum,
buf[salt_len + 3] = count & 0xff;
__hmac_sha1(checksum, password, password_len,
buf, salt_len + 4, tmp1);
buf, salt_len + 4, tmp1, SHA1_MAC_LEN);
memcpy(digest, tmp1, SHA1_MAC_LEN);
for (i = 1; i < iterations; i++) {
__hmac_sha1(checksum, password, password_len,
tmp1, SHA1_MAC_LEN, tmp2);
tmp1, SHA1_MAC_LEN, tmp2, SHA1_MAC_LEN);
memcpy(tmp1, tmp2, SHA1_MAC_LEN);
for (j = 0; j < SHA1_MAC_LEN; j++)
@ -173,7 +175,7 @@ bool prf_sha1(const void *key, size_t key_len,
for (i = 0; i < (size + 19) / 20; i++) {
__hmac_sha1(checksum, key, key_len, input, input_len,
output + offset);
output + offset, SHA1_MAC_LEN);
offset += 20;
input[input_len - 1]++;

10
src/sha256.c
View File

@ -32,8 +32,9 @@
#define SHA256_MAC_LEN 32
static void __hmac_sha256(struct l_checksum *checksum,
const void *key, size_t key_len,
const void *data, size_t data_len, void *output)
const void *key, size_t key_len,
const void *data, size_t data_len,
void *output, size_t size)
{
unsigned char ipad[64];
unsigned char opad[64];
@ -73,7 +74,8 @@ static void __hmac_sha256(struct l_checksum *checksum,
/* perform outer SHA256 */
l_checksum_update(checksum, opad, sizeof(opad));
l_checksum_update(checksum, digest, SHA256_MAC_LEN);
l_checksum_get_digest(checksum, output, SHA256_MAC_LEN);
l_checksum_get_digest(checksum, output,
size > SHA256_MAC_LEN ? SHA256_MAC_LEN : size);
l_checksum_reset(checksum);
}
@ -85,7 +87,7 @@ bool hmac_sha256(const void *key, size_t key_len,
checksum = l_checksum_new(L_CHECKSUM_SHA256);
__hmac_sha256(checksum, key, key_len, data, data_len, output);
__hmac_sha256(checksum, key, key_len, data, data_len, output, size);
l_checksum_free(checksum);