aesni: Align all class instances to 16 byte boundaries

While the required members are aligned in the struct as required, on 32-bit
platforms the allocator aligns the structures itself to 8 bytes only. This
results in non-aligned struct members, and invalid memory accesses.

src/libstrongswan/plugins/aesni/aesni_cbc.c

@@ -693,7 +693,7 @@ METHOD(crypter_t, destroy, void,
 {
 	DESTROY_IF(this->ekey);
 	DESTROY_IF(this->dkey);
-	free(this);
+	free_align(this);
 }
 
 /**
@@ -720,7 +720,7 @@ aesni_cbc_t *aesni_cbc_create(encryption_algorithm_t algo, size_t key_size)
 			return NULL;
 	}
 
-	INIT(this,
+	INIT_ALIGN(this, sizeof(__m128i),
 		.public = {
 			.crypter = {
 				.encrypt = _encrypt,

src/libstrongswan/plugins/aesni/aesni_ccm.c

@@ -902,7 +902,7 @@ METHOD(aead_t, destroy, void,
 {
 	DESTROY_IF(this->key);
 	this->iv_gen->destroy(this->iv_gen);
-	free(this);
+	free_align(this);
 }
 
 /**
@@ -949,7 +949,7 @@ aesni_ccm_t *aesni_ccm_create(encryption_algorithm_t algo,
 			return NULL;
 	}
 
-	INIT(this,
+	INIT_ALIGN(this, sizeof(__m128i),
 		.public = {
 			.aead = {
 				.encrypt = _encrypt,

src/libstrongswan/plugins/aesni/aesni_cmac.c

@@ -314,7 +314,7 @@ METHOD(mac_t, destroy, void,
 	DESTROY_IF(this->k);
 	memwipe(&this->k1, sizeof(this->k1));
 	memwipe(&this->k2, sizeof(this->k2));
-	free(this);
+	free_align(this);
 }
 
 /*
@@ -324,7 +324,7 @@ mac_t *aesni_cmac_create(encryption_algorithm_t algo, size_t key_size)
 {
 	private_mac_t *this;
 
-	INIT(this,
+	INIT_ALIGN(this, sizeof(__m128i),
 		.public = {
 			.get_mac = _get_mac,
 			.get_mac_size = _get_mac_size,

src/libstrongswan/plugins/aesni/aesni_ctr.c

@@ -623,7 +623,7 @@ METHOD(crypter_t, destroy, void,
 	private_aesni_ctr_t *this)
 {
 	DESTROY_IF(this->key);
-	free(this);
+	free_align(this);
 }
 
 /**
@@ -650,7 +650,7 @@ aesni_ctr_t *aesni_ctr_create(encryption_algorithm_t algo, size_t key_size)
 			return NULL;
 	}
 
-	INIT(this,
+	INIT_ALIGN(this, sizeof(__m128i),
 		.public = {
 			.crypter = {
 				.encrypt = _crypt,

src/libstrongswan/plugins/aesni/aesni_gcm.c

@@ -1465,7 +1465,7 @@ METHOD(aead_t, destroy, void,
 	memwipe(&this->hhh, sizeof(this->hhh));
 	memwipe(&this->hhhh, sizeof(this->hhhh));
 	this->iv_gen->destroy(this->iv_gen);
-	free(this);
+	free_align(this);
 }
 
 /**
@@ -1512,7 +1512,7 @@ aesni_gcm_t *aesni_gcm_create(encryption_algorithm_t algo,
 			return NULL;
 	}
 
-	INIT(this,
+	INIT_ALIGN(this, sizeof(__m128i),
 		.public = {
 			.aead = {
 				.encrypt = _encrypt,

src/libstrongswan/plugins/aesni/aesni_key.c

@@ -244,7 +244,7 @@ METHOD(aesni_key_t, destroy, void,
 	private_aesni_key_t *this)
 {
 	memwipe(this, sizeof(*this) + (this->public.rounds + 1) * AES_BLOCK_SIZE);
-	free(this);
+	free_align(this);
 }
 
 /**
@@ -270,7 +270,7 @@ aesni_key_t *aesni_key_create(bool encrypt, chunk_t key)
 			return NULL;
 	}
 
-	INIT_EXTRA(this, (rounds + 1) * AES_BLOCK_SIZE,
+	INIT_EXTRA_ALIGN(this, (rounds + 1) * AES_BLOCK_SIZE, sizeof(__m128i),
 		.public = {
 			.destroy = _destroy,
 			.rounds = rounds,

src/libstrongswan/plugins/aesni/aesni_xcbc.c

@@ -309,7 +309,7 @@ METHOD(mac_t, destroy, void,
 	DESTROY_IF(this->k1);
 	memwipe(&this->k2, sizeof(this->k2));
 	memwipe(&this->k3, sizeof(this->k3));
-	free(this);
+	free_align(this);
 }
 
 /*
@@ -319,7 +319,7 @@ mac_t *aesni_xcbc_create(encryption_algorithm_t algo, size_t key_size)
 {
 	private_aesni_mac_t *this;
 
-	INIT(this,
+	INIT_ALIGN(this, sizeof(__m128i),
 		.public = {
 			.get_mac = _get_mac,
 			.get_mac_size = _get_mac_size,