- implemented
authorMartin Willi <martin@strongswan.org>
Tue, 22 Nov 2005 09:43:32 +0000 (09:43 -0000)
committerMartin Willi <martin@strongswan.org>
Tue, 22 Nov 2005 09:43:32 +0000 (09:43 -0000)
- not tested!

Source/charon/transforms/prfs/prf_hmac_sha1.c
Source/charon/transforms/prfs/prf_hmac_sha1.h

index fc1ea74..6aa7d91 100644 (file)
@@ -1,8 +1,9 @@
 /**
- * @file prf_hmac_sha1.h
+ * @file prf_hmac_sha1.c
  * 
  * @brief Implementation of prf_t interface using the
- * HMAC SHA1 algorithm.
+ * HMAC SHA1 algorithm. This simply wraps hmac-sha1
+ * in a prf.
  * 
  */
 
@@ -24,6 +25,7 @@
 #include "prf_hmac_sha1.h"
 
 #include "../../utils/allocator.h"
+#include "../hmac.h"
 
 typedef struct private_prf_hmac_sha1_s private_prf_hmac_sha1_t;
 
@@ -32,14 +34,55 @@ struct private_prf_hmac_sha1_s {
         * public interface for this prf
         */
        prf_hmac_sha1_t public; 
+       
+       /**
+        * hmac to use for generation
+        */
+       hmac_t *hmac;
 };
 
+/**
+ * implementation of prf_t.get_bytes
+ */
+static status_t get_bytes(private_prf_hmac_sha1_t *this, chunk_t seed, u_int8_t *buffer)
+{
+       return this->hmac->get_mac(this->hmac, seed, buffer);
+}
 
+/**
+ * implementation of prf_t.allocate_bytes
+ */
+static status_t allocate_bytes(private_prf_hmac_sha1_t *this, chunk_t seed, chunk_t *chunk)
+{
+       return this->hmac->allocate_mac(this->hmac, seed, chunk);
+}
 
+/**
+ * implementation of prf_t.get_block_size
+ */
+static size_t get_block_size(private_prf_hmac_sha1_t *this)
+{
+       return this->hmac->get_block_size(this->hmac);
+}
 
+/**
+ * implementation of prf_t.set_key
+ */
+static status_t set_key(private_prf_hmac_sha1_t *this, chunk_t key)
+{
+       this->hmac->set_key(this->hmac, key);
+       return SUCCESS;
+}
 
-
-
+/**
+ * implementation of prf_t.destroy
+ */
+static status_t destroy(private_prf_hmac_sha1_t *this)
+{
+       allocator_free(this);
+       this->hmac->destroy(this->hmac);
+       return SUCCESS;
+}
 
 /*
  * Described in header
@@ -53,11 +96,18 @@ prf_hmac_sha1_t *prf_hmac_sha1_create()
                return NULL;    
        }
        
-       return &(this->public);
+       this->public.prf_interface.get_bytes = (status_t (*) (prf_t *,chunk_t,u_int8_t*))get_bytes;
+       this->public.prf_interface.allocate_bytes = (status_t (*) (prf_t*,chunk_t,chunk_t*))allocate_bytes;
+       this->public.prf_interface.get_block_size = (size_t (*) (prf_t*))get_block_size;
+       this->public.prf_interface.set_key = (status_t (*) (prf_t *,chunk_t))set_key;
+       this->public.prf_interface.destroy = (status_t (*) (prf_t *))destroy;
+       
+       this->hmac = hmac_create(HASH_SHA1);
+       if (this->hmac == NULL)
+       {
+               allocator_free(this);
+               return NULL;    
+       }
        
+       return &(this->public);
 }
-
-
-
-
-
index 19a0fa6..3b4305c 100644 (file)
@@ -2,7 +2,8 @@
  * @file prf_hmac_sha1.h
  * 
  * @brief Implementation of prf_t interface using the
- * HMAC SHA1 algorithm.
+ * HMAC SHA1 algorithm. This simply wraps hmac-sha1
+ * in a prf.
  * 
  */
 
@@ -29,7 +30,7 @@
 #include "../../types.h"
 
 /**
- * Object representing a diffie hellman exchange
+ * Object representing a prf using HMAC-SHA1
  * 
  */
 typedef struct prf_hmac_sha1_s prf_hmac_sha1_t;