|
380
|
1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
|
|
2 * |
|
|
3 * LibTomCrypt is a library that provides various cryptographic |
|
|
4 * algorithms in a highly modular and flexible manner. |
|
|
5 * |
|
|
6 * The library is free for all purposes without any express |
|
|
7 * guarantee it works. |
|
|
8 * |
|
|
9 * Tom St Denis, [email protected], http://libtomcrypt.com |
|
|
10 */ |
|
|
11 #include "tomcrypt.h" |
|
|
12 |
|
|
13 /** |
|
|
14 @file xcbc_process.c |
|
|
15 XCBC Support, XCBC-MAC a block of memory |
|
|
16 */ |
|
|
17 |
|
|
18 #ifdef LTC_XCBC |
|
|
19 |
|
|
20 /** XCBC-MAC a block of memory |
|
|
21 @param cipher Index of cipher to use |
|
|
22 @param key [in] Secret key |
|
|
23 @param keylen Length of key in octets |
|
|
24 @param in [in] Message to MAC |
|
|
25 @param inlen Length of input in octets |
|
|
26 @param out [out] Destination for the MAC tag |
|
|
27 @param outlen [in/out] Output size and final tag size |
|
|
28 Return CRYPT_OK on success. |
|
|
29 */ |
|
|
30 int xcbc_memory(int cipher, |
|
|
31 const unsigned char *key, unsigned long keylen, |
|
|
32 const unsigned char *in, unsigned long inlen, |
|
|
33 unsigned char *out, unsigned long *outlen) |
|
|
34 { |
|
|
35 xcbc_state *xcbc; |
|
|
36 int err; |
|
|
37 |
|
|
38 /* is the cipher valid? */ |
|
|
39 if ((err = cipher_is_valid(cipher)) != CRYPT_OK) { |
|
|
40 return err; |
|
|
41 } |
|
|
42 |
|
|
43 /* Use accelerator if found */ |
|
|
44 if (cipher_descriptor[cipher].xcbc_memory != NULL) { |
|
|
45 return cipher_descriptor[cipher].xcbc_memory(key, keylen, in, inlen, out, outlen); |
|
|
46 } |
|
|
47 |
|
|
48 xcbc = XCALLOC(1, sizeof(*xcbc)); |
|
|
49 if (xcbc == NULL) { |
|
|
50 return CRYPT_MEM; |
|
|
51 } |
|
|
52 |
|
|
53 if ((err = xcbc_init(xcbc, cipher, key, keylen)) != CRYPT_OK) { |
|
|
54 goto done; |
|
|
55 } |
|
|
56 |
|
|
57 if ((err = xcbc_process(xcbc, in, inlen)) != CRYPT_OK) { |
|
|
58 goto done; |
|
|
59 } |
|
|
60 |
|
|
61 err = xcbc_done(xcbc, out, outlen); |
|
|
62 done: |
|
|
63 XFREE(xcbc); |
|
|
64 return err; |
|
|
65 } |
|
|
66 |
|
|
67 #endif |
|
|
68 |
|
|
69 /* $Source: /cvs/libtom/libtomcrypt/src/mac/xcbc/xcbc_memory.c,v $ */ |
|
|
70 /* $Revision: 1.4 $ */ |
|
|
71 /* $Date: 2006/11/21 23:02:42 $ */ |
