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rearranged the HMAC header to tolerate having missing hash types

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This commit is contained in:
John Safranek 2013-04-03 17:33:50 -07:00
parent bf69de7054
commit 2dd22938d6
1 changed files with 29 additions and 12 deletions
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41
cyassl/ctaocrypt/hmac.h
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@ -25,11 +25,15 @@
#ifndef CTAO_CRYPT_HMAC_H
#define CTAO_CRYPT_HMAC_H
#include <cyassl/ctaocrypt/types.h>
#ifndef NO_MD5
#include <cyassl/ctaocrypt/md5.h>
#endif
#include <cyassl/ctaocrypt/sha.h>
#ifndef NO_SHA
#include <cyassl/ctaocrypt/sha.h>
#endif
#ifndef NO_SHA256
#include <cyassl/ctaocrypt/sha256.h>
@ -54,13 +58,26 @@
enum {
IPAD = 0x36,
OPAD = 0x5C,
/* If any hash is not enabled, add the ID here. */
#ifdef NO_MD5
MD5 = 0,
#endif
#ifdef NO_SHA
SHA = 1,
#endif
#ifdef NO_SHA256
SHA256 = 2,
#endif
#ifndef CYASSL_SHA512
SHA512 = 4,
#endif
#ifndef CYASSL_SHA384
SHA384 = 5,
#endif
/* Select the largest available hash for the buffer size. */
#if defined(CYASSL_SHA512)
#ifndef CYASSL_SHA384
SHA384 = 5,
#endif
INNER_HASH_SIZE = SHA512_DIGEST_SIZE,
HMAC_BLOCK_SIZE = SHA512_BLOCK_SIZE
#elif defined(CYASSL_SHA384)
@ -68,15 +85,15 @@ enum {
HMAC_BLOCK_SIZE = SHA384_BLOCK_SIZE
#elif !defined(NO_SHA256)
INNER_HASH_SIZE = SHA256_DIGEST_SIZE,
HMAC_BLOCK_SIZE = SHA256_BLOCK_SIZE,
SHA512 = 4,
SHA384 = 5
#else
HMAC_BLOCK_SIZE = SHA256_BLOCK_SIZE
#elif !defined(NO_SHA)
INNER_HASH_SIZE = SHA_DIGEST_SIZE,
HMAC_BLOCK_SIZE = SHA_BLOCK_SIZE,
SHA256 = 2, /* hash type unique */
SHA512 = 4,
SHA384 = 5
HMAC_BLOCK_SIZE = SHA_BLOCK_SIZE
#elif !defined(NO_MD5)
INNER_HASH_SIZE = MD5_DIGEST_SIZE,
HMAC_BLOCK_SIZE = MD5_BLOCK_SIZE
#else
#error "You have to have some kind of hash if you want to use HMAC."
#endif
};