Mercurial > dropbear

annotate libtomcrypt/src/mac/xcbc/xcbc_memory_multi.c @ 1486:cf43bbb6b8ff

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author Matt Johnston <matt@ucc.asn.au>
date Sat, 10 Feb 2018 19:06:30 +0800
parents 6dba84798cd5
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
382
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parents:
diff changeset
1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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diff changeset
2 *
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diff changeset
3 * LibTomCrypt is a library that provides various cryptographic
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diff changeset
4 * algorithms in a highly modular and flexible manner.
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diff changeset
5 *
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diff changeset
6 * The library is free for all purposes without any express
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diff changeset
7 * guarantee it works.
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diff changeset
8 */
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diff changeset
9 #include "tomcrypt.h"
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diff changeset
10 #include <stdarg.h>
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diff changeset
11
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents: 1435
diff changeset
12 /**
382
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diff changeset
13 @file xcbc_memory_multi.c
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diff changeset
14 XCBC support, process multiple blocks of memory, Tom St Denis
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diff changeset
15 */
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diff changeset
16
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diff changeset
17 #ifdef LTC_XCBC
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18
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diff changeset
19 /**
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents: 1435
diff changeset
20 XCBC multiple blocks of memory
382
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diff changeset
21 @param cipher The index of the desired cipher
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22 @param key The secret key
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23 @param keylen The length of the secret key (octets)
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24 @param out [out] The destination of the authentication tag
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25 @param outlen [in/out] The max size and resulting size of the authentication tag (octets)
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26 @param in The data to send through XCBC
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27 @param inlen The length of the data to send through XCBC (octets)
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28 @param ... tuples of (data,len) pairs to XCBC, terminated with a (NULL,x) (x=don't care)
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29 @return CRYPT_OK if successful
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
30 */
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents: 1435
diff changeset
31 int xcbc_memory_multi(int cipher,
382
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diff changeset
32 const unsigned char *key, unsigned long keylen,
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33 unsigned char *out, unsigned long *outlen,
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diff changeset
34 const unsigned char *in, unsigned long inlen, ...)
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diff changeset
35 {
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diff changeset
36 int err;
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diff changeset
37 xcbc_state *xcbc;
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
38 va_list args;
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39 const unsigned char *curptr;
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diff changeset
40 unsigned long curlen;
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41
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42 LTC_ARGCHK(key != NULL);
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43 LTC_ARGCHK(in != NULL);
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44 LTC_ARGCHK(out != NULL);
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45 LTC_ARGCHK(outlen != NULL);
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46
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47 /* allocate ram for xcbc state */
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48 xcbc = XMALLOC(sizeof(xcbc_state));
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49 if (xcbc == NULL) {
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50 return CRYPT_MEM;
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51 }
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52
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diff changeset
53 /* xcbc process the message */
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diff changeset
54 if ((err = xcbc_init(xcbc, cipher, key, keylen)) != CRYPT_OK) {
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Matt Johnston <matt@ucc.asn.au>
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55 goto LBL_ERR;
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56 }
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57 va_start(args, inlen);
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents: 1435
diff changeset
58 curptr = in;
382
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diff changeset
59 curlen = inlen;
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diff changeset
60 for (;;) {
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61 /* process buf */
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diff changeset
62 if ((err = xcbc_process(xcbc, curptr, curlen)) != CRYPT_OK) {
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Matt Johnston <matt@ucc.asn.au>
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63 goto LBL_ERR;
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64 }
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parents:
diff changeset
65 /* step to next */
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diff changeset
66 curptr = va_arg(args, const unsigned char*);
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diff changeset
67 if (curptr == NULL) {
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diff changeset
68 break;
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parents:
diff changeset
69 }
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diff changeset
70 curlen = va_arg(args, unsigned long);
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parents:
diff changeset
71 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
72 if ((err = xcbc_done(xcbc, out, outlen)) != CRYPT_OK) {
0cbe8f6dbf9e propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
73 goto LBL_ERR;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
74 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
75 LBL_ERR:
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
76 #ifdef LTC_CLEAN_STACK
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parents:
diff changeset
77 zeromem(xcbc, sizeof(xcbc_state));
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
78 #endif
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
79 XFREE(xcbc);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
80 va_end(args);
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents: 1435
diff changeset
81 return err;
382
0cbe8f6dbf9e propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
82 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
83
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
84 #endif
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parents:
diff changeset
85
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents: 1435
diff changeset
86 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents: 1435
diff changeset
87 /* git commit: $Format:%H$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents: 1435
diff changeset
88 /* commit time: $Format:%ai$ */