Add a return value to crypter_t.encrypt

src/libstrongswan/plugins/gcrypt/gcrypt_crypter.c

@@ -59,18 +59,15 @@ struct private_gcrypt_crypter_t {
 /**
  * Set the IV for en/decryption
  */
-static void set_iv(private_gcrypt_crypter_t *this, chunk_t iv)
+static bool set_iv(private_gcrypt_crypter_t *this, chunk_t iv)
 {
 	if (this->ctr_mode)
 	{
 		memcpy(this->ctr.iv, iv.ptr, sizeof(this->ctr.iv));
 		this->ctr.counter = htonl(1);
-		gcry_cipher_setctr(this->h, &this->ctr, sizeof(this->ctr));
-	}
-	else
-	{
-		gcry_cipher_setiv(this->h, iv.ptr, iv.len);
+		return gcry_cipher_setctr(this->h, &this->ctr, sizeof(this->ctr)) == 0;
 	}
+	return gcry_cipher_setiv(this->h, iv.ptr, iv.len) == 0;
 }
 
 METHOD(crypter_t, decrypt, void,
@@ -89,20 +86,20 @@ METHOD(crypter_t, decrypt, void,
 	}
 }
 
-METHOD(crypter_t, encrypt, void,
+METHOD(crypter_t, encrypt, bool,
 	private_gcrypt_crypter_t *this, chunk_t data, chunk_t iv, chunk_t *dst)
 {
-	set_iv(this, iv);
-
+	if (!set_iv(this, iv))
+	{
+		return FALSE;
+	}
 	if (dst)
 	{
 		*dst = chunk_alloc(data.len);
-		gcry_cipher_encrypt(this->h, dst->ptr, dst->len, data.ptr, data.len);
-	}
-	else
-	{
-		gcry_cipher_encrypt(this->h, data.ptr, data.len, NULL, 0);
+		return gcry_cipher_encrypt(this->h, dst->ptr, dst->len,
+								   data.ptr, data.len) == 0;
 	}
+	return gcry_cipher_encrypt(this->h, data.ptr, data.len, NULL, 0) == 0;
 }
 
 METHOD(crypter_t, get_block_size, size_t,