OSX/libsecurity_apple_csp/open_ssl/rsa/rsa_null.c

   1 /*
   2  * Copyright (c) 2000-2001,2011,2014 Apple Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18
  19 /* rsa_null.c */
  20 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
  21  * project 1999.
  22  */
  23 /* ====================================================================
  24  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
  25  *
  26  * Redistribution and use in source and binary forms, with or without
  27  * modification, are permitted provided that the following conditions
  28  * are met:
  29  *
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  *
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in
  35  *    the documentation and/or other materials provided with the
  36  *    distribution.
  37  *
  38  * 3. All advertising materials mentioning features or use of this
  39  *    software must display the following acknowledgment:
  40  *    "This product includes software developed by the OpenSSL Project
  41  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  42  *
  43  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  44  *    endorse or promote products derived from this software without
  45  *    prior written permission. For written permission, please contact
  46  *    licensing@OpenSSL.org.
  47  *
  48  * 5. Products derived from this software may not be called "OpenSSL"
  49  *    nor may "OpenSSL" appear in their names without prior written
  50  *    permission of the OpenSSL Project.
  51  *
  52  * 6. Redistributions of any form whatsoever must retain the following
  53  *    acknowledgment:
  54  *    "This product includes software developed by the OpenSSL Project
  55  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  56  *
  57  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  58  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  59  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  60  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  61  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  62  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  63  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  64  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  65  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  66  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  67  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  68  * OF THE POSSIBILITY OF SUCH DAMAGE.
  69  * ====================================================================
  70  *
  71  * This product includes cryptographic software written by Eric Young
  72  * (eay@cryptsoft.com).  This product includes software written by Tim
  73  * Hudson (tjh@cryptsoft.com).
  74  *
  75  */
  76
  77 #include <stdio.h>
  78 #include "cryptlib.h"
  79 #include <openssl/bn_legacy.h>
  80 #include <openssl/rsa_legacy.h>
  81 #include <openssl/rand.h>
  82
  83 /* This is a dummy RSA implementation that just returns errors when called.
  84  * It is designed to allow some RSA functions to work while stopping those
  85  * covered by the RSA patent. That is RSA, encryption, decryption, signing
  86  * and verify is not allowed but RSA key generation, key checking and other
  87  * operations (like storing RSA keys) are permitted.
  88  */
  89
  90 static int RSA_null_public_encrypt(int flen, unsigned char *from,
  91                 unsigned char *to, RSA *rsa,int padding);
  92 static int RSA_null_private_encrypt(int flen, unsigned char *from,
  93                 unsigned char *to, RSA *rsa,int padding);
  94 static int RSA_null_public_decrypt(int flen, unsigned char *from,
  95                 unsigned char *to, RSA *rsa,int padding);
  96 static int RSA_null_private_decrypt(int flen, unsigned char *from,
  97                 unsigned char *to, RSA *rsa,int padding);
  98 #if 0 /* not currently used */
  99 static int RSA_null_mod_exp(BIGNUM *r0, BIGNUM *i, RSA *rsa);
 100 #endif
 101 static int RSA_null_init(RSA *rsa);
 102 static int RSA_null_finish(RSA *rsa);
 103 static const RSA_METHOD rsa_null_meth={
 104         "Null RSA",
 105         RSA_null_public_encrypt,
 106         RSA_null_public_decrypt,
 107         RSA_null_private_encrypt,
 108         RSA_null_private_decrypt,
 109         NULL, NULL,
 110         RSA_null_init,
 111         RSA_null_finish,
 112         0,
 113         NULL,
 114         };
 115
 116 const RSA_METHOD *RSA_null_method(void)
 117         {
 118         return(&rsa_null_meth);
 119         }
 120
 121 static int RSA_null_public_encrypt(int flen, unsigned char *from,
 122              unsigned char *to, RSA *rsa, int padding)
 123         {
 124         RSAerr(RSA_F_RSA_NULL, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
 125         return -1;
 126         }
 127
 128 static int RSA_null_private_encrypt(int flen, unsigned char *from,
 129              unsigned char *to, RSA *rsa, int padding)
 130         {
 131         RSAerr(RSA_F_RSA_NULL, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
 132         return -1;
 133         }
 134
 135 static int RSA_null_private_decrypt(int flen, unsigned char *from,
 136              unsigned char *to, RSA *rsa, int padding)
 137         {
 138         RSAerr(RSA_F_RSA_NULL, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
 139         return -1;
 140         }
 141
 142 static int RSA_null_public_decrypt(int flen, unsigned char *from,
 143              unsigned char *to, RSA *rsa, int padding)
 144         {
 145         RSAerr(RSA_F_RSA_NULL, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
 146         return -1;
 147         }
 148
 149 #if 0 /* not currently used */
 150 static int RSA_null_mod_exp(BIGNUM *r0, BIGNUM *I, RSA *rsa)
 151         {
 152         RSAerr(RSA_F_RSA_NULL, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
 153         return -1;
 154         }
 155 #endif
 156
 157 static int RSA_null_init(RSA *rsa)
 158         {
 159         return(1);
 160         }
 161
 162 static int RSA_null_finish(RSA *rsa)
 163         {
 164         return(1);
 165         }
 166
 167