Openssl 1.1.0h

crypto/rsa/rsa_null.c

@@ -0,0 +1,93 @@
+/*
+ * Copyright 1999-2016 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/bn.h>
+#include "rsa_locl.h"
+
+/*
+ * This is a dummy RSA implementation that just returns errors when called.
+ * It is designed to allow some RSA functions to work while stopping those
+ * covered by the RSA patent. That is RSA, encryption, decryption, signing
+ * and verify is not allowed but RSA key generation, key checking and other
+ * operations (like storing RSA keys) are permitted.
+ */
+
+static int RSA_null_public_encrypt(int flen, const unsigned char *from,
+                                   unsigned char *to, RSA *rsa, int padding);
+static int RSA_null_private_encrypt(int flen, const unsigned char *from,
+                                    unsigned char *to, RSA *rsa, int padding);
+static int RSA_null_public_decrypt(int flen, const unsigned char *from,
+                                   unsigned char *to, RSA *rsa, int padding);
+static int RSA_null_private_decrypt(int flen, const unsigned char *from,
+                                    unsigned char *to, RSA *rsa, int padding);
+static int RSA_null_init(RSA *rsa);
+static int RSA_null_finish(RSA *rsa);
+static RSA_METHOD rsa_null_meth = {
+    "Null RSA",
+    RSA_null_public_encrypt,
+    RSA_null_public_decrypt,
+    RSA_null_private_encrypt,
+    RSA_null_private_decrypt,
+    NULL,
+    NULL,
+    RSA_null_init,
+    RSA_null_finish,
+    0,
+    NULL,
+    NULL,
+    NULL,
+    NULL
+};
+
+const RSA_METHOD *RSA_null_method(void)
+{
+    return (&rsa_null_meth);
+}
+
+static int RSA_null_public_encrypt(int flen, const unsigned char *from,
+                                   unsigned char *to, RSA *rsa, int padding)
+{
+    RSAerr(RSA_F_RSA_NULL_PUBLIC_ENCRYPT, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
+    return -1;
+}
+
+static int RSA_null_private_encrypt(int flen, const unsigned char *from,
+                                    unsigned char *to, RSA *rsa, int padding)
+{
+    RSAerr(RSA_F_RSA_NULL_PRIVATE_ENCRYPT,
+           RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
+    return -1;
+}
+
+static int RSA_null_private_decrypt(int flen, const unsigned char *from,
+                                    unsigned char *to, RSA *rsa, int padding)
+{
+    RSAerr(RSA_F_RSA_NULL_PRIVATE_DECRYPT,
+           RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
+    return -1;
+}
+
+static int RSA_null_public_decrypt(int flen, const unsigned char *from,
+                                   unsigned char *to, RSA *rsa, int padding)
+{
+    RSAerr(RSA_F_RSA_NULL_PUBLIC_DECRYPT, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
+    return -1;
+}
+
+static int RSA_null_init(RSA *rsa)
+{
+    return (1);
+}
+
+static int RSA_null_finish(RSA *rsa)
+{
+    return (1);
+}