version 0.3.33

[fms.git] / libs / libtomcrypt / hashes / helper / hash_memory.c

diff --git a/libs/libtomcrypt/hashes/helper/hash_memory.c b/libs/libtomcrypt/hashes/helper/hash_memory.c
new file mode 100644 (file)
index 0000000..def9fa7
--- /dev/null
+++ b/libs/libtomcrypt/hashes/helper/hash_memory.c
@@ -0,0 +1,69 @@
+/* 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, tomstdenis@gmail.com, http://libtomcrypt.com
+ */
+#include "tomcrypt.h"
+
+/**
+  @file hash_memory.c
+  Hash memory helper, Tom St Denis
+*/
+
+/**
+  Hash a block of memory and store the digest.
+  @param hash   The index of the hash you wish to use
+  @param in     The data you wish to hash
+  @param inlen  The length of the data to hash (octets)
+  @param out    [out] Where to store the digest
+  @param outlen [in/out] Max size and resulting size of the digest
+  @return CRYPT_OK if successful
+*/
+int hash_memory(int hash, const unsigned char *in, unsigned long inlen, unsigned char *out, unsigned long *outlen)
+{
+    hash_state *md;
+    int err;
+
+    LTC_ARGCHK(in     != NULL);
+    LTC_ARGCHK(out    != NULL);
+    LTC_ARGCHK(outlen != NULL);
+
+    if ((err = hash_is_valid(hash)) != CRYPT_OK) {
+        return err;
+    }
+
+    if (*outlen < hash_descriptor[hash].hashsize) {
+       *outlen = hash_descriptor[hash].hashsize;
+       return CRYPT_BUFFER_OVERFLOW;
+    }
+
+    md = XMALLOC(sizeof(hash_state));
+    if (md == NULL) {
+       return CRYPT_MEM;
+    }
+
+    if ((err = hash_descriptor[hash].init(md)) != CRYPT_OK) {
+       goto LBL_ERR;
+    }
+    if ((err = hash_descriptor[hash].process(md, in, inlen)) != CRYPT_OK) {
+       goto LBL_ERR;
+    }
+    err = hash_descriptor[hash].done(md, out);
+    *outlen = hash_descriptor[hash].hashsize;
+LBL_ERR:
+#ifdef LTC_CLEAN_STACK
+    zeromem(md, sizeof(hash_state));
+#endif
+    XFREE(md);
+
+    return err;
+}
+
+/* $Source: /cvs/libtom/libtomcrypt/src/hashes/helper/hash_memory.c,v $ */
+/* $Revision: 1.5 $ */
+/* $Date: 2006/06/16 21:53:41 $ */