68 lines
1.4 KiB
C
68 lines
1.4 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@iahu.ca, http://libtomcrypt.org
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*/
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/* PMAC implementation by Tom St Denis */
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#include "mycrypt.h"
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#ifdef PMAC
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int pmac_file(int cipher,
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const unsigned char *key, unsigned long keylen,
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const char *filename,
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unsigned char *out, unsigned long *outlen)
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{
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#ifdef NO_FILE
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return CRYPT_NOP;
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#else
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int err, x;
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pmac_state pmac;
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FILE *in;
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unsigned char buf[512];
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_ARGCHK(key != NULL);
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_ARGCHK(filename != NULL);
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_ARGCHK(out != NULL);
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_ARGCHK(outlen != NULL);
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in = fopen(filename, "rb");
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if (in == NULL) {
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return CRYPT_FILE_NOTFOUND;
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}
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if ((err = pmac_init(&pmac, cipher, key, keylen)) != CRYPT_OK) {
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fclose(in);
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return err;
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}
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do {
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x = fread(buf, 1, sizeof(buf), in);
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if ((err = pmac_process(&pmac, buf, x)) != CRYPT_OK) {
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fclose(in);
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return err;
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}
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} while (x == sizeof(buf));
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fclose(in);
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if ((err = pmac_done(&pmac, out, outlen)) != CRYPT_OK) {
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return err;
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}
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#ifdef CLEAN_STACK
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zeromem(buf, sizeof(buf));
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#endif
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return CRYPT_OK;
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#endif
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}
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#endif
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