implemented sha2_hasher which supports SHA-256, SHA-384 and SHA-512

src/libstrongswan/crypto/prfs/prf.c

@@ -32,12 +32,12 @@
  * String mappings for encryption_algorithm_t.
  */
 mapping_t pseudo_random_function_m[] = {
-{PRF_UNDEFINED, "PRF_UNDEFINED"},
-{PRF_HMAC_MD5, "PRF_HMAC_MD5"},
-{PRF_HMAC_SHA1, "PRF_HMAC_SHA1"},
-{PRF_HMAC_TIGER, "PRF_HMAC_TIGER"},
-{PRF_AES128_CBC, "PRF_AES128_CBC"},
-{MAPPING_END, NULL}
+	{PRF_UNDEFINED, "PRF_UNDEFINED"},
+	{PRF_HMAC_MD5, "PRF_HMAC_MD5"},
+	{PRF_HMAC_SHA1, "PRF_HMAC_SHA1"},
+	{PRF_HMAC_TIGER, "PRF_HMAC_TIGER"},
+	{PRF_AES128_CBC, "PRF_AES128_CBC"},
+	{MAPPING_END, NULL}
 };
 
 /*
@@ -61,8 +61,3 @@ prf_t *prf_create(pseudo_random_function_t pseudo_random_function)
 			return NULL;
 	}
 }
-
-
-
-
-

src/libstrongswan/crypto/prfs/prf.h

@@ -31,7 +31,7 @@ typedef enum pseudo_random_function_t pseudo_random_function_t;
 /**
  * @brief Pseudo random function, as in IKEv2 RFC 3.3.2.
  * 
- * Currently only the following algorithms are implemented and therefore supported:
+ * Currently only the following algorithms are implemented:
  * - PRF_HMAC_MD5
  * - PRF_HMAC_SHA1
  * 
@@ -39,16 +39,12 @@ typedef enum pseudo_random_function_t pseudo_random_function_t;
  */
 enum pseudo_random_function_t {
 	PRF_UNDEFINED = 1024,
-	/**
-	 * Implemented in class hmac_prf_t.
-	 */
+	/** Implemented via hmac_prf_t. */
 	PRF_HMAC_MD5 = 1,
-	/**
-	 * Implemented in class hmac_prf_t.
-	 */
+	/** Implemented via hmac_prf_t. */
 	PRF_HMAC_SHA1 = 2,
 	PRF_HMAC_TIGER = 3,
-	PRF_AES128_CBC = 4
+	PRF_AES128_CBC = 4,
 };
 
 /** 
@@ -72,9 +68,8 @@ typedef struct prf_t prf_t;
  */
 struct prf_t {
 	/**
-	 * @brief Generates pseudo random bytes and writes them
-	 * in the buffer.
-	 * 
+	 * @brief Generates pseudo random bytes and writes them in the buffer.
+	 *
 	 * @param this			calling object
 	 * @param seed			a chunk containing the seed for the next bytes
 	 * @param[out] buffer	pointer where the generated bytes will be written