[331] | 1 | /*
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| 2 | * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 | #include <openssl/bn.h>
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| 13 | #include "rsa_locl.h"
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| 14 |
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| 15 | /*
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| 16 | * This is a dummy RSA implementation that just returns errors when called.
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| 17 | * It is designed to allow some RSA functions to work while stopping those
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| 18 | * covered by the RSA patent. That is RSA, encryption, decryption, signing
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| 19 | * and verify is not allowed but RSA key generation, key checking and other
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| 20 | * operations (like storing RSA keys) are permitted.
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| 21 | */
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| 22 |
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| 23 | static int RSA_null_public_encrypt(int flen, const unsigned char *from,
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| 24 | unsigned char *to, RSA *rsa, int padding);
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| 25 | static int RSA_null_private_encrypt(int flen, const unsigned char *from,
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| 26 | unsigned char *to, RSA *rsa, int padding);
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| 27 | static int RSA_null_public_decrypt(int flen, const unsigned char *from,
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| 28 | unsigned char *to, RSA *rsa, int padding);
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| 29 | static int RSA_null_private_decrypt(int flen, const unsigned char *from,
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| 30 | unsigned char *to, RSA *rsa, int padding);
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| 31 | static int RSA_null_init(RSA *rsa);
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| 32 | static int RSA_null_finish(RSA *rsa);
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| 33 | static RSA_METHOD rsa_null_meth = {
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| 34 | "Null RSA",
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| 35 | RSA_null_public_encrypt,
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| 36 | RSA_null_public_decrypt,
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| 37 | RSA_null_private_encrypt,
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| 38 | RSA_null_private_decrypt,
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| 39 | NULL,
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| 40 | NULL,
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| 41 | RSA_null_init,
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| 42 | RSA_null_finish,
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| 43 | 0,
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| 44 | NULL,
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| 45 | NULL,
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| 46 | NULL,
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| 47 | NULL
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| 48 | };
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| 49 |
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| 50 | const RSA_METHOD *RSA_null_method(void)
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| 51 | {
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| 52 | return (&rsa_null_meth);
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| 53 | }
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| 54 |
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| 55 | static int RSA_null_public_encrypt(int flen, const unsigned char *from,
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| 56 | unsigned char *to, RSA *rsa, int padding)
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| 57 | {
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| 58 | RSAerr(RSA_F_RSA_NULL_PUBLIC_ENCRYPT, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
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| 59 | return -1;
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| 60 | }
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| 61 |
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| 62 | static int RSA_null_private_encrypt(int flen, const unsigned char *from,
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| 63 | unsigned char *to, RSA *rsa, int padding)
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| 64 | {
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| 65 | RSAerr(RSA_F_RSA_NULL_PRIVATE_ENCRYPT,
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| 66 | RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
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| 67 | return -1;
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| 68 | }
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| 69 |
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| 70 | static int RSA_null_private_decrypt(int flen, const unsigned char *from,
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| 71 | unsigned char *to, RSA *rsa, int padding)
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| 72 | {
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| 73 | RSAerr(RSA_F_RSA_NULL_PRIVATE_DECRYPT,
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| 74 | RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
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| 75 | return -1;
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| 76 | }
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| 77 |
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| 78 | static int RSA_null_public_decrypt(int flen, const unsigned char *from,
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| 79 | unsigned char *to, RSA *rsa, int padding)
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| 80 | {
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| 81 | RSAerr(RSA_F_RSA_NULL_PUBLIC_DECRYPT, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
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| 82 | return -1;
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| 83 | }
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| 84 |
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| 85 | static int RSA_null_init(RSA *rsa)
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| 86 | {
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| 87 | return (1);
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| 88 | }
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| 89 |
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| 90 | static int RSA_null_finish(RSA *rsa)
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| 91 | {
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| 92 | return (1);
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| 93 | }
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