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https://github.com/clearml/dropbear
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a938f4cfe1
to branch 'au.asn.ucc.matt.dropbear' (head 02c413252c90e9de8e03d91e9939dde3029f5c0a) --HG-- extra : convert_revision : 52ccb0ad0587a62bc64aecb939adbb76546aac16
91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*
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* Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com
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*/
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#include "tomcrypt.h"
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#include <stdarg.h>
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/**
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@file xcbc_memory_multi.c
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XCBC support, process multiple blocks of memory, Tom St Denis
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*/
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#ifdef LTC_XCBC
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/**
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XCBC multiple blocks of memory
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@param cipher The index of the desired cipher
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@param key The secret key
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@param keylen The length of the secret key (octets)
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@param out [out] The destination of the authentication tag
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@param outlen [in/out] The max size and resulting size of the authentication tag (octets)
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@param in The data to send through XCBC
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@param inlen The length of the data to send through XCBC (octets)
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@param ... tuples of (data,len) pairs to XCBC, terminated with a (NULL,x) (x=don't care)
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@return CRYPT_OK if successful
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*/
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int xcbc_memory_multi(int cipher,
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const unsigned char *key, unsigned long keylen,
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unsigned char *out, unsigned long *outlen,
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const unsigned char *in, unsigned long inlen, ...)
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{
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int err;
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xcbc_state *xcbc;
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va_list args;
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const unsigned char *curptr;
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unsigned long curlen;
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LTC_ARGCHK(key != NULL);
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LTC_ARGCHK(in != NULL);
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LTC_ARGCHK(out != NULL);
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LTC_ARGCHK(outlen != NULL);
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/* allocate ram for xcbc state */
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xcbc = XMALLOC(sizeof(xcbc_state));
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if (xcbc == NULL) {
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return CRYPT_MEM;
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}
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/* xcbc process the message */
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if ((err = xcbc_init(xcbc, cipher, key, keylen)) != CRYPT_OK) {
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goto LBL_ERR;
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}
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va_start(args, inlen);
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curptr = in;
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curlen = inlen;
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for (;;) {
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/* process buf */
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if ((err = xcbc_process(xcbc, curptr, curlen)) != CRYPT_OK) {
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goto LBL_ERR;
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}
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/* step to next */
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curptr = va_arg(args, const unsigned char*);
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if (curptr == NULL) {
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break;
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}
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curlen = va_arg(args, unsigned long);
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}
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if ((err = xcbc_done(xcbc, out, outlen)) != CRYPT_OK) {
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goto LBL_ERR;
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}
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LBL_ERR:
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#ifdef LTC_CLEAN_STACK
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zeromem(xcbc, sizeof(xcbc_state));
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#endif
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XFREE(xcbc);
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va_end(args);
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return err;
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}
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#endif
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/* $Source: /cvs/libtom/libtomcrypt/src/mac/xcbc/xcbc_memory_multi.c,v $ */
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/* $Revision: 1.1 $ */
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/* $Date: 2006/11/03 01:53:25 $ */
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