Imported OpenSSL 1.1.1a

crypto/evp/e_null.c

@@ -0,0 +1,50 @@
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include "internal/cryptlib.h"
+#include <openssl/evp.h>
+#include <openssl/objects.h>
+#include "internal/evp_int.h"
+
+static int null_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+                         const unsigned char *iv, int enc);
+static int null_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+                       const unsigned char *in, size_t inl);
+static const EVP_CIPHER n_cipher = {
+    NID_undef,
+    1, 0, 0, 0,
+    null_init_key,
+    null_cipher,
+    NULL,
+    0,
+    NULL,
+    NULL,
+    NULL,
+    NULL
+};
+
+const EVP_CIPHER *EVP_enc_null(void)
+{
+    return &n_cipher;
+}
+
+static int null_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+                         const unsigned char *iv, int enc)
+{
+    return 1;
+}
+
+static int null_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+                       const unsigned char *in, size_t inl)
+{
+    if (in != out)
+        memcpy(out, in, inl);
+    return 1;
+}