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lavu/hmac: Add support for SHA-2 

Includes HMAC-SHA-224, HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512.
Tested using test vectors from https://tools.ietf.org/html/rfc4231

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
James Almer 2013-06-10 17:24:47 -03:00 committed by Michael Niedermayer
parent b1d61eb7aa
commit 82ef67016e
3 changed files with 57 additions and 7 deletions
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58
libavutil/hmac.c
View File

@ -24,10 +24,11 @@
#include "hmac.h"
#include "md5.h"
#include "sha.h"
#include "sha512.h"
#include "mem.h"
#define MAX_HASHLEN 20
#define MAX_BLOCKLEN 64
#define MAX_HASHLEN 64
#define MAX_BLOCKLEN 128
struct AVHMAC {
void *hash;
@ -39,11 +40,24 @@ struct AVHMAC {
int keylen;
};
static av_cold void sha1_init(void *ctx)
{
av_sha_init(ctx, 160);
#define DEFINE_SHA(bits) \
static av_cold void sha ## bits ##_init(void *ctx) \
{ \
av_sha_init(ctx, bits); \
}
#define DEFINE_SHA512(bits) \
static av_cold void sha ## bits ##_init(void *ctx) \
{ \
av_sha512_init(ctx, bits); \
}
DEFINE_SHA(160)
DEFINE_SHA(224)
DEFINE_SHA(256)
DEFINE_SHA512(384)
DEFINE_SHA512(512)
AVHMAC *av_hmac_alloc(enum AVHMACType type)
{
AVHMAC *c = av_mallocz(sizeof(*c));
@ -61,11 +75,43 @@ AVHMAC *av_hmac_alloc(enum AVHMACType type)
case AV_HMAC_SHA1:
c->blocklen = 64;
c->hashlen = 20;
c->init = sha1_init;
c->init = sha160_init;
c->update = (void*)av_sha_update;
c->final = (void*)av_sha_final;
c->hash = av_sha_alloc();
break;
case AV_HMAC_SHA224:
c->blocklen = 64;
c->hashlen = 28;
c->init = sha224_init;
c->update = (void*)av_sha_update;
c->final = (void*)av_sha_final;
c->hash = av_sha_alloc();
break;
case AV_HMAC_SHA256:
c->blocklen = 64;
c->hashlen = 32;
c->init = sha256_init;
c->update = (void*)av_sha_update;
c->final = (void*)av_sha_final;
c->hash = av_sha_alloc();
break;
case AV_HMAC_SHA384:
c->blocklen = 128;
c->hashlen = 48;
c->init = sha384_init;
c->update = (void*)av_sha512_update;
c->final = (void*)av_sha512_final;
c->hash = av_sha512_alloc();
break;
case AV_HMAC_SHA512:
c->blocklen = 128;
c->hashlen = 64;
c->init = sha512_init;
c->update = (void*)av_sha512_update;
c->final = (void*)av_sha512_final;
c->hash = av_sha512_alloc();
break;
default:
av_free(c);
return NULL;

4
libavutil/hmac.h
View File

@ -32,6 +32,10 @@
enum AVHMACType {
AV_HMAC_MD5,
AV_HMAC_SHA1,
AV_HMAC_SHA224 = 10,
AV_HMAC_SHA256,
AV_HMAC_SHA384,
AV_HMAC_SHA512,
};
typedef struct AVHMAC AVHMAC;

2
libavutil/version.h
View File

@ -76,7 +76,7 @@
#define LIBAVUTIL_VERSION_MAJOR 52
#define LIBAVUTIL_VERSION_MINOR 35
#define LIBAVUTIL_VERSION_MICRO 100
#define LIBAVUTIL_VERSION_MICRO 101
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
LIBAVUTIL_VERSION_MINOR, \