1 files changed, 106 insertions, 0 deletions
diff --git a/src/misc/pkcs5/pkcs_5_1.c b/src/misc/pkcs5/pkcs_5_1.c
new file mode 100644
index 0000000..90411b7
--- /dev/null
+++ b/src/misc/pkcs5/pkcs_5_1.c
@@ -0,0 +1,106 @@
+/* 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.org
+ */
+#include <tomcrypt.h>
+
+/** 
+   @file pkcs_5_1.c
+   PKCS #5, Algorithm #1, Tom St Denis
+*/
+#ifdef PKCS_5
+/**
+   Execute PKCS #5 v1
+   @param password         The password (or key)
+   @param password_len     The length of the password (octet)
+   @param salt             The salt (or nonce) which is 8 octets long
+   @param iteration_count  The PKCS #5 v1 iteration count
+   @param hash_idx         The index of the hash desired
+   @param out              [out] The destination for this algorithm
+   @param outlen           [in/out] The max size and resulting size of the algorithm output
+   @return CRYPT_OK if successful
+*/
+int pkcs_5_alg1(const unsigned char *password, unsigned long password_len, 
+                const unsigned char *salt, 
+                int iteration_count,  int hash_idx,
+                unsigned char *out,   unsigned long *outlen)
+{
+   int err;
+   unsigned long x;
+   hash_state    *md;
+   unsigned char *buf;
+
+   LTC_ARGCHK(password != NULL);
+   LTC_ARGCHK(salt     != NULL);
+   LTC_ARGCHK(out      != NULL);
+   LTC_ARGCHK(outlen   != NULL);
+
+   /* test hash IDX */
+   if ((err = hash_is_valid(hash_idx)) != CRYPT_OK) {
+      return err;
+   }
+
+   /* allocate memory */
+   md  = XMALLOC(sizeof(hash_state));
+   buf = XMALLOC(MAXBLOCKSIZE);
+   if (md == NULL || buf == NULL) {
+      if (md != NULL) {
+         XFREE(md);
+      }
+      if (buf != NULL) { 
+         XFREE(buf);
+      }
+      return CRYPT_MEM;
+   }        
+
+   /* hash initial password + salt */
+   if ((err = hash_descriptor[hash_idx].init(md)) != CRYPT_OK) {
+       goto LBL_ERR;
+   }
+   if ((err = hash_descriptor[hash_idx].process(md, password, password_len)) != CRYPT_OK) {
+       goto LBL_ERR;
+   }
+   if ((err = hash_descriptor[hash_idx].process(md, salt, 8)) != CRYPT_OK) {
+       goto LBL_ERR;
+   }
+   if ((err = hash_descriptor[hash_idx].done(md, buf)) != CRYPT_OK) {
+       goto LBL_ERR;
+   }
+
+   while (--iteration_count) {
+      /* code goes here. */
+      x = MAXBLOCKSIZE;
+      if ((err = hash_memory(hash_idx, buf, hash_descriptor[hash_idx].hashsize, buf, &x)) != CRYPT_OK) {
+         goto LBL_ERR;
+      }
+   }
+
+   /* copy upto outlen bytes */
+   for (x = 0; x < hash_descriptor[hash_idx].hashsize && x < *outlen; x++) {
+       out[x] = buf[x];
+   }
+   *outlen = x;
+   err = CRYPT_OK;
+LBL_ERR:
+#ifdef LTC_CLEAN_STACK 
+   zeromem(buf, MAXBLOCKSIZE);
+   zeromem(md, sizeof(hash_state));
+#endif
+
+   XFREE(buf);
+   XFREE(md);
+
+   return err;
+}
+
+#endif
+
+/* $Source: /cvs/libtom/libtomcrypt/src/misc/pkcs5/pkcs_5_1.c,v $ */
+/* $Revision: 1.4 $ */
+/* $Date: 2005/05/05 14:35:59 $ */