X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=libtomcrypt%2Fsrc%2Fmac%2Ff9%2Ff9_done.c;fp=libtomcrypt%2Fsrc%2Fmac%2Ff9%2Ff9_done.c;h=8d2ccb056b330f3470bf9bf693787cdc126ce2e7;hb=66bc25938679f1d6a1d1200f329093d82a5e99b4;hp=0000000000000000000000000000000000000000;hpb=a52ee0733f420ca20224049260d6fc5cf7d8f621;p=zpackage

diff --git a/libtomcrypt/src/mac/f9/f9_done.c b/libtomcrypt/src/mac/f9/f9_done.c
new file mode 100644
index 0000000..8d2ccb0
--- /dev/null
+++ b/libtomcrypt/src/mac/f9/f9_done.c
@@ -0,0 +1,75 @@
+/* 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 f9_done.c
+  f9 Support, terminate the state
+*/
+
+#ifdef LTC_F9_MODE
+
+/** Terminate the f9-MAC state
+  @param f9     f9 state to terminate
+  @param out      [out] Destination for the MAC tag
+  @param outlen   [in/out] Destination size and final tag size
+  Return CRYPT_OK on success
+*/
+int f9_done(f9_state *f9, unsigned char *out, unsigned long *outlen)
+{
+   int err, x;
+   LTC_ARGCHK(f9 != NULL);
+   LTC_ARGCHK(out  != NULL);
+
+   /* check structure */
+   if ((err = cipher_is_valid(f9->cipher)) != CRYPT_OK) {
+      return err;
+   }
+
+   if ((f9->blocksize > cipher_descriptor[f9->cipher].block_length) || (f9->blocksize < 0) ||
+       (f9->buflen > f9->blocksize) || (f9->buflen < 0)) {
+      return CRYPT_INVALID_ARG;
+   }
+
+   if (f9->buflen != 0) {
+      /* encrypt */
+      cipher_descriptor[f9->cipher].ecb_encrypt(f9->IV, f9->IV, &f9->key);
+      f9->buflen = 0;
+      for (x = 0; x < f9->blocksize; x++) {
+         f9->ACC[x] ^= f9->IV[x];
+      }
+   }
+
+   /* schedule modified key */
+   if ((err = cipher_descriptor[f9->cipher].setup(f9->akey, f9->keylen, 0, &f9->key)) != CRYPT_OK) {
+      return err;
+   }
+
+   /* encrypt the ACC */
+   cipher_descriptor[f9->cipher].ecb_encrypt(f9->ACC, f9->ACC, &f9->key);
+   cipher_descriptor[f9->cipher].done(&f9->key);
+
+   /* extract tag */
+   for (x = 0; x < f9->blocksize && (unsigned long)x < *outlen; x++) {
+      out[x] = f9->ACC[x];
+   }
+   *outlen = x;
+
+#ifdef LTC_CLEAN_STACK
+   zeromem(f9, sizeof(*f9));
+#endif
+   return CRYPT_OK;
+}
+
+#endif
+
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */
+