[1] | 1 | /* crypto/rand/rand_lib.c */ |
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| 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * This package is an SSL implementation written |
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| 6 | * by Eric Young (eay@cryptsoft.com). |
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| 7 | * The implementation was written so as to conform with Netscapes SSL. |
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| 8 | * |
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| 9 | * This library is free for commercial and non-commercial use as long as |
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| 10 | * the following conditions are aheared to. The following conditions |
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| 11 | * apply to all code found in this distribution, be it the RC4, RSA, |
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| 12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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| 13 | * included with this distribution is covered by the same copyright terms |
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| 14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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| 15 | * |
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| 16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
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| 17 | * the code are not to be removed. |
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| 18 | * If this package is used in a product, Eric Young should be given attribution |
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| 19 | * as the author of the parts of the library used. |
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| 20 | * This can be in the form of a textual message at program startup or |
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| 21 | * in documentation (online or textual) provided with the package. |
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| 22 | * |
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| 23 | * Redistribution and use in source and binary forms, with or without |
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| 24 | * modification, are permitted provided that the following conditions |
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| 25 | * are met: |
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| 26 | * 1. Redistributions of source code must retain the copyright |
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| 27 | * notice, this list of conditions and the following disclaimer. |
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| 28 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 29 | * notice, this list of conditions and the following disclaimer in the |
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| 30 | * documentation and/or other materials provided with the distribution. |
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| 31 | * 3. All advertising materials mentioning features or use of this software |
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| 32 | * must display the following acknowledgement: |
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| 33 | * "This product includes cryptographic software written by |
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| 34 | * Eric Young (eay@cryptsoft.com)" |
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| 35 | * The word 'cryptographic' can be left out if the rouines from the library |
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| 36 | * being used are not cryptographic related :-). |
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| 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
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| 38 | * the apps directory (application code) you must include an acknowledgement: |
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| 39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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| 40 | * |
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| 41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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| 42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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| 45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 51 | * SUCH DAMAGE. |
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| 52 | * |
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| 53 | * The licence and distribution terms for any publically available version or |
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| 54 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
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| 55 | * copied and put under another distribution licence |
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| 56 | * [including the GNU Public Licence.] |
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| 57 | */ |
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| 58 | |
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| 59 | #include <stdio.h> |
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| 60 | #include <time.h> |
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| 61 | #include "cryptlib.h" |
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| 62 | #include "rand_lcl.h" |
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| 63 | #include <openssl/rand.h> |
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| 64 | #ifdef OPENSSL_FIPS |
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| 65 | #include <openssl/fips.h> |
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| 66 | #include <openssl/fips_rand.h> |
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| 67 | #endif |
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| 68 | |
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| 69 | #ifndef OPENSSL_NO_ENGINE |
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| 70 | #include <openssl/engine.h> |
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| 71 | #endif |
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| 72 | |
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| 73 | #if defined(OPENSSL_FIPS) && !defined(OPENSSL_NO_ENGINE) |
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| 74 | |
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| 75 | /* non-NULL if default_RAND_meth is ENGINE-provided */ |
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| 76 | static ENGINE *funct_ref =NULL; |
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| 77 | |
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| 78 | int eng_RAND_set_rand_method(const RAND_METHOD *meth, const RAND_METHOD **pmeth) |
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| 79 | { |
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| 80 | if(funct_ref) |
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| 81 | { |
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| 82 | ENGINE_finish(funct_ref); |
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| 83 | funct_ref = NULL; |
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| 84 | } |
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| 85 | *pmeth = meth; |
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| 86 | return 1; |
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| 87 | } |
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| 88 | |
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| 89 | const RAND_METHOD *eng_RAND_get_rand_method(const RAND_METHOD **pmeth) |
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| 90 | { |
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| 91 | if (!*pmeth) |
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| 92 | { |
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| 93 | ENGINE *e = ENGINE_get_default_RAND(); |
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| 94 | if(e) |
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| 95 | { |
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| 96 | *pmeth = ENGINE_get_RAND(e); |
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| 97 | if(!*pmeth) |
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| 98 | { |
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| 99 | ENGINE_finish(e); |
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| 100 | e = NULL; |
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| 101 | } |
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| 102 | } |
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| 103 | if(e) |
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| 104 | funct_ref = e; |
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| 105 | else |
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| 106 | if(FIPS_mode()) |
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| 107 | *pmeth=FIPS_rand_method(); |
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| 108 | else |
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| 109 | *pmeth = RAND_SSLeay(); |
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| 110 | } |
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| 111 | |
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| 112 | if(FIPS_mode() |
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| 113 | && *pmeth != FIPS_rand_check()) |
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| 114 | { |
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| 115 | RANDerr(RAND_F_ENG_RAND_GET_RAND_METHOD,RAND_R_NON_FIPS_METHOD); |
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| 116 | return 0; |
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| 117 | } |
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| 118 | |
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| 119 | return *pmeth; |
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| 120 | } |
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| 121 | |
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| 122 | int RAND_set_rand_engine(ENGINE *engine) |
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| 123 | { |
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| 124 | const RAND_METHOD *tmp_meth = NULL; |
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| 125 | if(engine) |
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| 126 | { |
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| 127 | if(!ENGINE_init(engine)) |
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| 128 | return 0; |
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| 129 | tmp_meth = ENGINE_get_RAND(engine); |
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| 130 | if(!tmp_meth) |
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| 131 | { |
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| 132 | ENGINE_finish(engine); |
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| 133 | return 0; |
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| 134 | } |
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| 135 | } |
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| 136 | /* This function releases any prior ENGINE so call it first */ |
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| 137 | RAND_set_rand_method(tmp_meth); |
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| 138 | funct_ref = engine; |
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| 139 | return 1; |
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| 140 | } |
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| 141 | |
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| 142 | void int_RAND_init_engine_callbacks(void) |
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| 143 | { |
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| 144 | static int done = 0; |
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| 145 | if (done) |
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| 146 | return; |
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| 147 | int_RAND_set_callbacks(eng_RAND_set_rand_method, |
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| 148 | eng_RAND_get_rand_method); |
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| 149 | done = 1; |
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| 150 | } |
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| 151 | |
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| 152 | #endif |
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