mirrors/wolfssl
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Added GMAC wrapper functions around AES-GCM

Browse Source
This commit is contained in:
John Safranek 2013-09-10 16:47:39 -07:00
parent 0ae966b350
commit d3db1a42de
3 changed files with 72 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
ctaocrypt/src/aes.c
View File

@ -2636,6 +2636,21 @@ int AesGcmDecrypt(Aes* aes, byte* out, const byte* in, word32 sz,
return 0;
}
CYASSL_API void GmacSetKey(Gmac* gmac, const byte* key, word32 len)
{
AesGcmSetKey(&gmac->aes, key, len);
}
CYASSL_API void GmacUpdate(Gmac* gmac, const byte* iv, word32 ivSz,
const byte* authIn, word32 authInSz,
byte* authTag, word32 authTagSz)
{
AesGcmEncrypt(&gmac->aes, NULL, NULL, 0, iv, ivSz,
authTag, authTagSz, authIn, authInSz);
}
#endif /* HAVE_AESGCM */
#ifdef HAVE_AESCCM

49
ctaocrypt/test/test.c
View File

@ -140,6 +140,7 @@ int des_test(void);
int des3_test(void);
int aes_test(void);
int aesgcm_test(void);
int gmac_test(void);
int aesccm_test(void);
int camellia_test(void);
int rsa_test(void);
@ -301,6 +302,13 @@ void ctaocrypt_test(void* args)
#endif
#ifdef HAVE_AESGCM
if ( (ret = gmac_test()) != 0)
err_sys("GMAC test passed!\n", ret);
else
printf( "GMAC test passed!\n");
#endif
#ifndef NO_RC4
if ( (ret = arc4_test()) != 0)
err_sys("ARC4 test failed!\n", ret);
@ -1928,6 +1936,47 @@ int aesgcm_test(void)
return 0;
}
int gmac_test(void)
{
Gmac gmac;
const byte k[] =
{
0x89, 0xc9, 0x49, 0xe9, 0xc8, 0x04, 0xaf, 0x01,
0x4d, 0x56, 0x04, 0xb3, 0x94, 0x59, 0xf2, 0xc8
};
const byte iv[] =
{
0xd1, 0xb1, 0x04, 0xc8, 0x15, 0xbf, 0x1e, 0x94,
0xe2, 0x8c, 0x8f, 0x16
};
const byte a[] =
{
0x82, 0xad, 0xcd, 0x63, 0x8d, 0x3f, 0xa9, 0xd9,
0xf3, 0xe8, 0x41, 0x00, 0xd6, 0x1e, 0x07, 0x77
};
const byte t[] =
{
0x88, 0xdb, 0x9d, 0x62, 0x17, 0x2e, 0xd0, 0x43,
0xaa, 0x10, 0xf1, 0x6d, 0x22, 0x7d, 0xc4, 0x1b
};
byte t2[sizeof(t)];
memset(t2, 0, sizeof(t2));
GmacSetKey(&gmac, k, sizeof(k));
GmacUpdate(&gmac, iv, sizeof(iv), a, sizeof(a), t2, sizeof(t2));
if (memcmp(t, t2, sizeof(t2)) != 0)
return -126;
return 0;
}
#endif /* HAVE_AESGCM */
#ifdef HAVE_AESCCM

8
cyassl/ctaocrypt/aes.h
View File

@ -115,6 +115,14 @@ CYASSL_API int AesGcmDecrypt(Aes* aes, byte* out, const byte* in, word32 sz,
const byte* iv, word32 ivSz,
const byte* authTag, word32 authTagSz,
const byte* authIn, word32 authInSz);
typedef struct Gmac {
Aes aes;
} Gmac;
CYASSL_API void GmacSetKey(Gmac* gmac, const byte* key, word32 len);
CYASSL_API void GmacUpdate(Gmac* gmac, const byte* iv, word32 ivSz,
const byte* authIn, word32 authInSz,
byte* authTag, word32 authTagSz);
#endif /* HAVE_AESGCM */
#ifdef HAVE_AESCCM
CYASSL_API void AesCcmSetKey(Aes* aes, const byte* key, word32 keySz);