botan: Fix build without AES and its modes

src/libstrongswan/plugins/botan/botan_crypter.c

@@ -25,6 +25,10 @@
 
 #include "botan_crypter.h"
 
+#include <botan/build.h>
+
+#if defined(BOTAN_HAS_AES) && defined(BOTAN_HAS_MODE_CBC)
+
 #include <botan/ffi.h>
 
 typedef struct private_botan_crypter_t private_botan_crypter_t;
@@ -189,3 +193,5 @@ botan_crypter_t *botan_crypter_create(encryption_algorithm_t algo,
 	this->key = chunk_alloc(key_size);
 	return &this->public;
 }
+
+#endif

src/libstrongswan/plugins/botan/botan_plugin.c

@@ -103,6 +103,7 @@ METHOD(plugin_t, get_features, int,
 #endif
 
 		/* crypters */
+#if defined(BOTAN_HAS_AES) && defined(BOTAN_HAS_MODE_CBC)
 		PLUGIN_REGISTER(CRYPTER, botan_crypter_create),
 #ifdef BOTAN_HAS_AES
 	#ifdef BOTAN_HAS_MODE_CBC
@@ -110,9 +111,13 @@ METHOD(plugin_t, get_features, int,
 			PLUGIN_PROVIDE(CRYPTER, ENCR_AES_CBC, 24),
 			PLUGIN_PROVIDE(CRYPTER, ENCR_AES_CBC, 32),
 	#endif
+#endif
 #endif
 
 		/* AEAD */
+#if (defined(BOTAN_HAS_AES) && \
+		(defined(BOTAN_HAS_AEAD_GCM) || defined(BOTAN_HAS_AEAD_CCM))) || \
+	defined(BOTAN_HAS_AEAD_CHACHA20_POLY1305)
 		PLUGIN_REGISTER(AEAD, botan_aead_create),
 #ifdef BOTAN_HAS_AES
 	#ifdef BOTAN_HAS_AEAD_GCM
@@ -140,6 +145,7 @@ METHOD(plugin_t, get_features, int,
 #endif
 #ifdef BOTAN_HAS_AEAD_CHACHA20_POLY1305
 			PLUGIN_PROVIDE(AEAD, ENCR_CHACHA20_POLY1305, 32),
+#endif
 #endif
 
 		/* hashers */