dropbear: omac_file.c comparison

put back the 0.95 makefile which was inadvertently merged over

comparison

equal deleted inserted replaced

--1:000000000000
+:d7da3b1e1540
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+*
+* LibTomCrypt is a library that provides various cryptographic
+* algorithms in a highly modular and flexible manner.
+*
+* The library is free for all purposes without any express
+* guarantee it works.
+*
+* Tom St Denis, [email protected], http://libtomcrypt.org
+*/
+/* OMAC1 Support by Tom St Denis (for 64 and 128 bit block ciphers only) */
+#include "mycrypt.h"
+#ifdef OMAC
+int omac_file(int cipher,
+const unsigned char *key, unsigned long keylen,
+const char *filename,
+unsigned char *out, unsigned long *outlen)
+{
+#ifdef NO_FILE
+return CRYPT_NOP;
+#else
+int err, x;
+omac_state omac;
+FILE *in;
+unsigned char buf[512];
+_ARGCHK(key      != NULL);
+_ARGCHK(filename != NULL);
+_ARGCHK(out      != NULL);
+_ARGCHK(outlen   != NULL);
+in = fopen(filename, "rb");
+if (in == NULL) {
+return CRYPT_FILE_NOTFOUND;
+}
+if ((err = omac_init(&omac, cipher, key, keylen)) != CRYPT_OK) {
+fclose(in);
+return err;
+}
+do {
+x = fread(buf, 1, sizeof(buf), in);
+if ((err = omac_process(&omac, buf, x)) != CRYPT_OK) {
+fclose(in);
+return err;
+}
+} while (x == sizeof(buf));
+fclose(in);
+if ((err = omac_done(&omac, out, outlen)) != CRYPT_OK) {
+return err;
+}
+#ifdef CLEAN_STACK
+zeromem(buf, sizeof(buf));
+#endif
+return CRYPT_OK;
+#endif
+}
+#endif

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