X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;ds=sidebyside;f=libtomcrypt%2Fsrc%2Fmac%2Fomac%2Fomac_memory.c;fp=libtomcrypt%2Fsrc%2Fmac%2Fomac%2Fomac_memory.c;h=1b57db85424a2aa29e2046419d90ceedd9f86850;hb=66bc25938679f1d6a1d1200f329093d82a5e99b4;hp=0000000000000000000000000000000000000000;hpb=a52ee0733f420ca20224049260d6fc5cf7d8f621;p=zpackage

diff --git a/libtomcrypt/src/mac/omac/omac_memory.c b/libtomcrypt/src/mac/omac/omac_memory.c
new file mode 100644
index 0000000..1b57db8
--- /dev/null
+++ b/libtomcrypt/src/mac/omac/omac_memory.c
@@ -0,0 +1,83 @@
+/* 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 omac_memory.c
+  OMAC1 support, process a block of memory, Tom St Denis
+*/
+
+#ifdef LTC_OMAC
+
+/**
+   OMAC a block of memory
+   @param cipher    The index of the desired cipher
+   @param key       The secret key
+   @param keylen    The length of the secret key (octets)
+   @param in        The data to send through OMAC
+   @param inlen     The length of the data to send through OMAC (octets)
+   @param out       [out] The destination of the authentication tag
+   @param outlen    [in/out]  The max size and resulting size of the authentication tag (octets)
+   @return CRYPT_OK if successful
+*/
+int omac_memory(int cipher,
+                const unsigned char *key, unsigned long keylen,
+                const unsigned char *in,  unsigned long inlen,
+                      unsigned char *out, unsigned long *outlen)
+{
+   int err;
+   omac_state *omac;
+
+   LTC_ARGCHK(key    != NULL);
+   LTC_ARGCHK(in     != NULL);
+   LTC_ARGCHK(out    != NULL);
+   LTC_ARGCHK(outlen != NULL);
+
+   /* is the cipher valid? */
+   if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
+      return err;
+   }
+
+   /* Use accelerator if found */
+   if (cipher_descriptor[cipher].omac_memory != NULL) {
+      return cipher_descriptor[cipher].omac_memory(key, keylen, in, inlen, out, outlen);
+   }
+
+   /* allocate ram for omac state */
+   omac = XMALLOC(sizeof(omac_state));
+   if (omac == NULL) {
+      return CRYPT_MEM;
+   }
+
+   /* omac process the message */
+   if ((err = omac_init(omac, cipher, key, keylen)) != CRYPT_OK) {
+      goto LBL_ERR;
+   }
+   if ((err = omac_process(omac, in, inlen)) != CRYPT_OK) {
+      goto LBL_ERR;
+   }
+   if ((err = omac_done(omac, out, outlen)) != CRYPT_OK) {
+      goto LBL_ERR;
+   }
+
+   err = CRYPT_OK;
+LBL_ERR:
+#ifdef LTC_CLEAN_STACK
+   zeromem(omac, sizeof(omac_state));
+#endif
+
+   XFREE(omac);
+   return err;
+}
+
+#endif
+
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */