[331] | 1 | /*
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| 2 | * Copyright 1995-2016 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 <openssl/crypto.h>
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| 12 | #include "internal/cryptlib.h"
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| 13 | #include <openssl/lhash.h>
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| 14 | #include "internal/bn_int.h"
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| 15 | #include <openssl/engine.h>
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| 16 | #include "rsa_locl.h"
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| 17 |
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| 18 | static const RSA_METHOD *default_RSA_meth = NULL;
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| 19 |
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| 20 | RSA *RSA_new(void)
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| 21 | {
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| 22 | RSA *r = RSA_new_method(NULL);
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| 23 |
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| 24 | return r;
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| 25 | }
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| 26 |
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| 27 | void RSA_set_default_method(const RSA_METHOD *meth)
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| 28 | {
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| 29 | default_RSA_meth = meth;
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| 30 | }
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| 31 |
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| 32 | const RSA_METHOD *RSA_get_default_method(void)
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| 33 | {
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| 34 | if (default_RSA_meth == NULL) {
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| 35 | #ifdef RSA_NULL
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| 36 | default_RSA_meth = RSA_null_method();
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| 37 | #else
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| 38 | default_RSA_meth = RSA_PKCS1_OpenSSL();
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| 39 | #endif
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| 40 | }
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| 41 |
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| 42 | return default_RSA_meth;
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| 43 | }
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| 44 |
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| 45 | const RSA_METHOD *RSA_get_method(const RSA *rsa)
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| 46 | {
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| 47 | return rsa->meth;
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| 48 | }
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| 49 |
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| 50 | int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
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| 51 | {
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| 52 | /*
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| 53 | * NB: The caller is specifically setting a method, so it's not up to us
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| 54 | * to deal with which ENGINE it comes from.
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| 55 | */
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| 56 | const RSA_METHOD *mtmp;
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| 57 | mtmp = rsa->meth;
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| 58 | if (mtmp->finish)
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| 59 | mtmp->finish(rsa);
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| 60 | #ifndef OPENSSL_NO_ENGINE
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| 61 | ENGINE_finish(rsa->engine);
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| 62 | rsa->engine = NULL;
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| 63 | #endif
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| 64 | rsa->meth = meth;
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| 65 | if (meth->init)
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| 66 | meth->init(rsa);
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| 67 | return 1;
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| 68 | }
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| 69 |
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| 70 | RSA *RSA_new_method(ENGINE *engine)
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| 71 | {
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| 72 | RSA *ret = OPENSSL_zalloc(sizeof(*ret));
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| 73 |
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| 74 | if (ret == NULL) {
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| 75 | RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
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| 76 | return NULL;
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| 77 | }
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| 78 |
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| 79 | ret->references = 1;
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| 80 | ret->lock = CRYPTO_THREAD_lock_new();
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| 81 | if (ret->lock == NULL) {
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| 82 | RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
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| 83 | OPENSSL_free(ret);
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| 84 | return NULL;
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| 85 | }
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| 86 |
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| 87 | ret->meth = RSA_get_default_method();
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| 88 | #ifndef OPENSSL_NO_ENGINE
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| 89 | ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
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| 90 | if (engine) {
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| 91 | if (!ENGINE_init(engine)) {
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| 92 | RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
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| 93 | goto err;
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| 94 | }
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| 95 | ret->engine = engine;
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| 96 | } else
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| 97 | ret->engine = ENGINE_get_default_RSA();
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| 98 | if (ret->engine) {
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| 99 | ret->meth = ENGINE_get_RSA(ret->engine);
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| 100 | if (ret->meth == NULL) {
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| 101 | RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
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| 102 | goto err;
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| 103 | }
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| 104 | }
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| 105 | #endif
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| 106 |
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| 107 | ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
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| 108 | if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) {
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| 109 | goto err;
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| 110 | }
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| 111 |
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| 112 | if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
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| 113 | RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_INIT_FAIL);
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| 114 | goto err;
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| 115 | }
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| 116 |
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| 117 | return ret;
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| 118 |
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| 119 | err:
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| 120 | RSA_free(ret);
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| 121 | return NULL;
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| 122 | }
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| 123 |
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| 124 | void RSA_free(RSA *r)
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| 125 | {
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| 126 | int i;
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| 127 |
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| 128 | if (r == NULL)
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| 129 | return;
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| 130 |
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| 131 | CRYPTO_atomic_add(&r->references, -1, &i, r->lock);
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| 132 | REF_PRINT_COUNT("RSA", r);
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| 133 | if (i > 0)
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| 134 | return;
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| 135 | REF_ASSERT_ISNT(i < 0);
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| 136 |
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| 137 | if (r->meth->finish)
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| 138 | r->meth->finish(r);
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| 139 | #ifndef OPENSSL_NO_ENGINE
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| 140 | ENGINE_finish(r->engine);
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| 141 | #endif
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| 142 |
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| 143 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
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| 144 |
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| 145 | CRYPTO_THREAD_lock_free(r->lock);
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| 146 |
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| 147 | BN_clear_free(r->n);
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| 148 | BN_clear_free(r->e);
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| 149 | BN_clear_free(r->d);
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| 150 | BN_clear_free(r->p);
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| 151 | BN_clear_free(r->q);
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| 152 | BN_clear_free(r->dmp1);
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| 153 | BN_clear_free(r->dmq1);
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| 154 | BN_clear_free(r->iqmp);
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| 155 | BN_BLINDING_free(r->blinding);
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| 156 | BN_BLINDING_free(r->mt_blinding);
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| 157 | OPENSSL_free(r->bignum_data);
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| 158 | OPENSSL_free(r);
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| 159 | }
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| 160 |
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| 161 | int RSA_up_ref(RSA *r)
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| 162 | {
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| 163 | int i;
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| 164 |
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| 165 | if (CRYPTO_atomic_add(&r->references, 1, &i, r->lock) <= 0)
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| 166 | return 0;
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| 167 |
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| 168 | REF_PRINT_COUNT("RSA", r);
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| 169 | REF_ASSERT_ISNT(i < 2);
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| 170 | return ((i > 1) ? 1 : 0);
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| 171 | }
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| 172 |
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| 173 | int RSA_set_ex_data(RSA *r, int idx, void *arg)
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| 174 | {
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| 175 | return (CRYPTO_set_ex_data(&r->ex_data, idx, arg));
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| 176 | }
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| 177 |
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| 178 | void *RSA_get_ex_data(const RSA *r, int idx)
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| 179 | {
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| 180 | return (CRYPTO_get_ex_data(&r->ex_data, idx));
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| 181 | }
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| 182 |
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| 183 | int RSA_security_bits(const RSA *rsa)
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| 184 | {
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| 185 | return BN_security_bits(BN_num_bits(rsa->n), -1);
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| 186 | }
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| 187 |
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| 188 | int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d)
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| 189 | {
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| 190 | /* If the fields n and e in r are NULL, the corresponding input
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| 191 | * parameters MUST be non-NULL for n and e. d may be
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| 192 | * left NULL (in case only the public key is used).
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| 193 | */
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| 194 | if ((r->n == NULL && n == NULL)
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| 195 | || (r->e == NULL && e == NULL))
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| 196 | return 0;
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| 197 |
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| 198 | if (n != NULL) {
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| 199 | BN_free(r->n);
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| 200 | r->n = n;
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| 201 | }
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| 202 | if (e != NULL) {
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| 203 | BN_free(r->e);
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| 204 | r->e = e;
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| 205 | }
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| 206 | if (d != NULL) {
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| 207 | BN_free(r->d);
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| 208 | r->d = d;
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| 209 | }
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| 210 |
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| 211 | return 1;
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| 212 | }
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| 213 |
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| 214 | int RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q)
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| 215 | {
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| 216 | /* If the fields p and q in r are NULL, the corresponding input
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| 217 | * parameters MUST be non-NULL.
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| 218 | */
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| 219 | if ((r->p == NULL && p == NULL)
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| 220 | || (r->q == NULL && q == NULL))
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| 221 | return 0;
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| 222 |
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| 223 | if (p != NULL) {
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| 224 | BN_free(r->p);
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| 225 | r->p = p;
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| 226 | }
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| 227 | if (q != NULL) {
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| 228 | BN_free(r->q);
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| 229 | r->q = q;
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| 230 | }
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| 231 |
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| 232 | return 1;
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| 233 | }
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| 234 |
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| 235 | int RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp)
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| 236 | {
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| 237 | /* If the fields dmp1, dmq1 and iqmp in r are NULL, the corresponding input
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| 238 | * parameters MUST be non-NULL.
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| 239 | */
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| 240 | if ((r->dmp1 == NULL && dmp1 == NULL)
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| 241 | || (r->dmq1 == NULL && dmq1 == NULL)
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| 242 | || (r->iqmp == NULL && iqmp == NULL))
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| 243 | return 0;
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| 244 |
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| 245 | if (dmp1 != NULL) {
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| 246 | BN_free(r->dmp1);
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| 247 | r->dmp1 = dmp1;
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| 248 | }
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| 249 | if (dmq1 != NULL) {
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| 250 | BN_free(r->dmq1);
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| 251 | r->dmq1 = dmq1;
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| 252 | }
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| 253 | if (iqmp != NULL) {
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| 254 | BN_free(r->iqmp);
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| 255 | r->iqmp = iqmp;
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| 256 | }
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| 257 |
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| 258 | return 1;
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| 259 | }
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| 260 |
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| 261 | void RSA_get0_key(const RSA *r,
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| 262 | const BIGNUM **n, const BIGNUM **e, const BIGNUM **d)
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| 263 | {
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| 264 | if (n != NULL)
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| 265 | *n = r->n;
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| 266 | if (e != NULL)
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| 267 | *e = r->e;
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| 268 | if (d != NULL)
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| 269 | *d = r->d;
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| 270 | }
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| 271 |
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| 272 | void RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q)
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| 273 | {
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| 274 | if (p != NULL)
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| 275 | *p = r->p;
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| 276 | if (q != NULL)
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| 277 | *q = r->q;
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| 278 | }
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| 279 |
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| 280 | void RSA_get0_crt_params(const RSA *r,
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| 281 | const BIGNUM **dmp1, const BIGNUM **dmq1,
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| 282 | const BIGNUM **iqmp)
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| 283 | {
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| 284 | if (dmp1 != NULL)
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| 285 | *dmp1 = r->dmp1;
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| 286 | if (dmq1 != NULL)
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| 287 | *dmq1 = r->dmq1;
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| 288 | if (iqmp != NULL)
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| 289 | *iqmp = r->iqmp;
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| 290 | }
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| 291 |
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| 292 | void RSA_clear_flags(RSA *r, int flags)
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| 293 | {
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| 294 | r->flags &= ~flags;
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| 295 | }
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| 296 |
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| 297 | int RSA_test_flags(const RSA *r, int flags)
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| 298 | {
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| 299 | return r->flags & flags;
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| 300 | }
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| 301 |
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| 302 | void RSA_set_flags(RSA *r, int flags)
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| 303 | {
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| 304 | r->flags |= flags;
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| 305 | }
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| 306 |
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| 307 | ENGINE *RSA_get0_engine(const RSA *r)
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| 308 | {
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| 309 | return r->engine;
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| 310 | }
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