Remove HASH_PREFERRED, usages are replaced with HASH_SHA1, which is required for IKEv2 anyway

src/libcharon/network/receiver.c

@@ -655,7 +655,7 @@ receiver_t *receiver_create()
 	this->initiator_only = lib->settings->get_bool(lib->settings,
 				"%s.initiator_only", FALSE, charon->name),
 
-	this->hasher = lib->crypto->create_hasher(lib->crypto, HASH_PREFERRED);
+	this->hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
 	if (!this->hasher)
 	{
 		DBG1(DBG_NET, "creating cookie hasher failed, no hashers supported");

src/libcharon/sa/ike_sa_manager.c

@@ -2133,7 +2133,7 @@ ike_sa_manager_t *ike_sa_manager_create()
 		},
 	);
 
-	this->hasher = lib->crypto->create_hasher(lib->crypto, HASH_PREFERRED);
+	this->hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
 	if (this->hasher == NULL)
 	{
 		DBG1(DBG_MGR, "manager initialization failed, no hasher supported");

src/libstrongswan/crypto/crypto_factory.c

@@ -249,9 +249,9 @@ METHOD(crypto_factory_t, create_hasher, hasher_t*,
 	enumerator = this->hashers->create_enumerator(this->hashers);
 	while (enumerator->enumerate(enumerator, &entry))
 	{
-		if (algo == HASH_PREFERRED || entry->algo == algo)
+		if (entry->algo == algo)
 		{
-			if (this->test_on_create && algo != HASH_PREFERRED &&
+			if (this->test_on_create &&
 				!this->tester->test_hasher(this->tester, algo,
 										   entry->create_hasher, NULL,
 										   default_plugin_name))

src/libstrongswan/crypto/crypto_factory.h

@@ -213,9 +213,6 @@ struct crypto_factory_t {
 	/**
 	 * Register a hasher constructor.
 	 *
-	 * The first added hasher is the preferred hasher returned on
-	 * create_hasher(HASH_PREFERRED).
-	 *
 	 * @param algo			algorithm to constructor
 	 * @param plugin_name	plugin that registered this algorithm
 	 * @param create		constructor function for that algorithm

src/libstrongswan/crypto/hashers/hasher.c

@@ -21,7 +21,6 @@
 
 ENUM(hash_algorithm_names, HASH_UNKNOWN, HASH_SHA512,
 	"HASH_UNKNOWN",
-	"HASH_PREFERRED",
 	"HASH_MD2",
 	"HASH_MD4",
 	"HASH_MD5",
@@ -34,7 +33,6 @@ ENUM(hash_algorithm_names, HASH_UNKNOWN, HASH_SHA512,
 
 ENUM(hash_algorithm_short_names, HASH_UNKNOWN, HASH_SHA512,
 	"unknown",
-	"preferred",
 	"md2",
 	"md4",
 	"md5",
@@ -199,7 +197,6 @@ integrity_algorithm_t hasher_algorithm_to_integrity(hash_algorithm_t alg,
 			}
 			break;
 		case HASH_SHA1:
-		case HASH_PREFERRED:
 			switch (length)
 			{
 				case 12:

src/libstrongswan/crypto/hashers/hasher.h

@@ -37,16 +37,14 @@ typedef struct hasher_t hasher_t;
 enum hash_algorithm_t {
 	/** not specified hash function */
 	HASH_UNKNOWN 		= 0,
-	/** preferred hash function, general purpose */
-	HASH_PREFERRED		= 1,
-	HASH_MD2 			= 2,
-	HASH_MD4			= 3,
-	HASH_MD5 			= 4,
-	HASH_SHA1 			= 5,
-	HASH_SHA224			= 6,
-	HASH_SHA256 		= 7,
-	HASH_SHA384 		= 8,
-	HASH_SHA512 		= 9
+	HASH_MD2 			= 1,
+	HASH_MD4			= 2,
+	HASH_MD5 			= 3,
+	HASH_SHA1 			= 4,
+	HASH_SHA224			= 5,
+	HASH_SHA256 		= 6,
+	HASH_SHA384 		= 7,
+	HASH_SHA512 		= 8
 };
 
 #define HASH_SIZE_MD2		16

src/libstrongswan/plugins/af_alg/af_alg_hasher.c

@@ -47,13 +47,13 @@ static struct {
 	char *name;
 	size_t size;
 } algs[AF_ALG_HASHER] = {
-	{HASH_SHA1,			"sha1",			HASH_SIZE_SHA1		},
+	{HASH_MD4,			"md4",			HASH_SIZE_MD4 		},
 	{HASH_MD5,			"md5",			HASH_SIZE_MD5 		},
+	{HASH_SHA1,			"sha1",			HASH_SIZE_SHA1		},
 	{HASH_SHA224,		"sha224",		HASH_SIZE_SHA224	},
 	{HASH_SHA256,		"sha256",		HASH_SIZE_SHA256	},
 	{HASH_SHA384,		"sha384",		HASH_SIZE_SHA384	},
 	{HASH_SHA512,		"sha512",		HASH_SIZE_SHA512	},
-	{HASH_MD4,			"md4",			HASH_SIZE_MD4 		},
 };
 
 /**

src/libstrongswan/plugins/gcrypt/gcrypt_plugin.c

@@ -132,9 +132,9 @@ METHOD(plugin_t, get_features, int,
 			PLUGIN_PROVIDE(CRYPTER, ENCR_TWOFISH_CBC, 32),
 		/* hashers */
 		PLUGIN_REGISTER(HASHER, gcrypt_hasher_create),
-			PLUGIN_PROVIDE(HASHER, HASH_SHA1),
 			PLUGIN_PROVIDE(HASHER, HASH_MD4),
 			PLUGIN_PROVIDE(HASHER, HASH_MD5),
+			PLUGIN_PROVIDE(HASHER, HASH_SHA1),
 			PLUGIN_PROVIDE(HASHER, HASH_SHA224),
 			PLUGIN_PROVIDE(HASHER, HASH_SHA256),
 			PLUGIN_PROVIDE(HASHER, HASH_SHA384),

src/libstrongswan/plugins/openssl/openssl_plugin.c

@@ -298,9 +298,6 @@ METHOD(plugin_t, get_features, int,
 			PLUGIN_PROVIDE(CRYPTER, ENCR_NULL, 0),
 		/* hashers */
 		PLUGIN_REGISTER(HASHER, openssl_hasher_create),
-#ifndef OPENSSL_NO_SHA1
-			PLUGIN_PROVIDE(HASHER, HASH_SHA1),
-#endif
 #ifndef OPENSSL_NO_MD2
 			PLUGIN_PROVIDE(HASHER, HASH_MD2),
 #endif
@@ -310,6 +307,9 @@ METHOD(plugin_t, get_features, int,
 #ifndef OPENSSL_NO_MD5
 			PLUGIN_PROVIDE(HASHER, HASH_MD5),
 #endif
+#ifndef OPENSSL_NO_SHA1
+			PLUGIN_PROVIDE(HASHER, HASH_SHA1),
+#endif
 #ifndef OPENSSL_NO_SHA256
 			PLUGIN_PROVIDE(HASHER, HASH_SHA224),
 			PLUGIN_PROVIDE(HASHER, HASH_SHA256),