commit files needed for zpm-fetchurl

[zpackage] / libtomcrypt / src / mac / pmac / pmac_done.c

diff --git a/libtomcrypt/src/mac/pmac/pmac_done.c b/libtomcrypt/src/mac/pmac/pmac_done.c
new file mode 100644 (file)
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+++ b/libtomcrypt/src/mac/pmac/pmac_done.c
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+/* 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.
+ */
+#include "tomcrypt.h"
+
+/**
+  @file pmac_done.c
+  PMAC implementation, terminate a session, by Tom St Denis
+*/
+
+#ifdef LTC_PMAC
+
+int pmac_done(pmac_state *state, unsigned char *out, unsigned long *outlen)
+{
+   int err, x;
+
+   LTC_ARGCHK(state != NULL);
+   LTC_ARGCHK(out   != NULL);
+   if ((err = cipher_is_valid(state->cipher_idx)) != CRYPT_OK) {
+      return err;
+   }
+
+   if ((state->buflen > (int)sizeof(state->block)) || (state->buflen < 0) ||
+       (state->block_len > (int)sizeof(state->block)) || (state->buflen > state->block_len)) {
+      return CRYPT_INVALID_ARG;
+   }
+
+
+   /* handle padding.  If multiple xor in L/x */
+
+   if (state->buflen == state->block_len) {
+      /* xor Lr against the checksum */
+      for (x = 0; x < state->block_len; x++) {
+          state->checksum[x] ^= state->block[x] ^ state->Lr[x];
+      }
+   } else {
+      /* otherwise xor message bytes then the 0x80 byte */
+      for (x = 0; x < state->buflen; x++) {
+          state->checksum[x] ^= state->block[x];
+      }
+      state->checksum[x] ^= 0x80;
+   }
+
+   /* encrypt it */
+   if ((err = cipher_descriptor[state->cipher_idx].ecb_encrypt(state->checksum, state->checksum, &state->key)) != CRYPT_OK) {
+      return err;
+   }
+   cipher_descriptor[state->cipher_idx].done(&state->key);
+
+   /* store it */
+   for (x = 0; x < state->block_len && x < (int)*outlen; x++) {
+       out[x] = state->checksum[x];
+   }
+   *outlen = x;
+
+#ifdef LTC_CLEAN_STACK
+   zeromem(state, sizeof(*state));
+#endif
+   return CRYPT_OK;
+}
+
+#endif
+
+
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */