| OLD | NEW |
|---|
| (Empty) |
| 1 /* crypto/rsa/rsa_lib.c */ | |
| 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
| 3 * All rights reserved. | |
| 4 * | |
| 5 * This package is an SSL implementation written | |
| 6 * by Eric Young (eay@cryptsoft.com). | |
| 7 * The implementation was written so as to conform with Netscapes SSL. | |
| 8 * | |
| 9 * This library is free for commercial and non-commercial use as long as | |
| 10 * the following conditions are aheared to. The following conditions | |
| 11 * apply to all code found in this distribution, be it the RC4, RSA, | |
| 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
| 13 * included with this distribution is covered by the same copyright terms | |
| 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
| 15 * | |
| 16 * Copyright remains Eric Young's, and as such any Copyright notices in | |
| 17 * the code are not to be removed. | |
| 18 * If this package is used in a product, Eric Young should be given attribution | |
| 19 * as the author of the parts of the library used. | |
| 20 * This can be in the form of a textual message at program startup or | |
| 21 * in documentation (online or textual) provided with the package. | |
| 22 * | |
| 23 * Redistribution and use in source and binary forms, with or without | |
| 24 * modification, are permitted provided that the following conditions | |
| 25 * are met: | |
| 26 * 1. Redistributions of source code must retain the copyright | |
| 27 * notice, this list of conditions and the following disclaimer. | |
| 28 * 2. Redistributions in binary form must reproduce the above copyright | |
| 29 * notice, this list of conditions and the following disclaimer in the | |
| 30 * documentation and/or other materials provided with the distribution. | |
| 31 * 3. All advertising materials mentioning features or use of this software | |
| 32 * must display the following acknowledgement: | |
| 33 * "This product includes cryptographic software written by | |
| 34 * Eric Young (eay@cryptsoft.com)" | |
| 35 * The word 'cryptographic' can be left out if the rouines from the library | |
| 36 * being used are not cryptographic related :-). | |
| 37 * 4. If you include any Windows specific code (or a derivative thereof) from | |
| 38 * the apps directory (application code) you must include an acknowledgement: | |
| 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
| 40 * | |
| 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
| 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
| 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 51 * SUCH DAMAGE. | |
| 52 * | |
| 53 * The licence and distribution terms for any publically available version or | |
| 54 * derivative of this code cannot be changed. i.e. this code cannot simply be | |
| 55 * copied and put under another distribution licence | |
| 56 * [including the GNU Public Licence.] | |
| 57 */ | |
| 58 | |
| 59 #include <stdio.h> | |
| 60 #include <openssl/crypto.h> | |
| 61 #include "cryptlib.h" | |
| 62 #include <openssl/lhash.h> | |
| 63 #include <openssl/bn.h> | |
| 64 #include <openssl/rsa.h> | |
| 65 #include <openssl/rand.h> | |
| 66 #ifndef OPENSSL_NO_ENGINE | |
| 67 #include <openssl/engine.h> | |
| 68 #endif | |
| 69 | |
| 70 int RSA_size(const RSA *r) | |
| 71 { | |
| 72 return(BN_num_bytes(r->n)); | |
| 73 } | |
| 74 | |
| 75 int RSA_public_encrypt(int flen, const unsigned char *from, unsigned char *to, | |
| 76 RSA *rsa, int padding) | |
| 77 { | |
| 78 #ifdef OPENSSL_FIPS | |
| 79 if (FIPS_mode() && !(rsa->meth->flags & RSA_FLAG_FIPS_METHOD) | |
| 80 && !(rsa->flags & RSA_FLAG_NON_FIPS_ALLOW)) | |
| 81 { | |
| 82 RSAerr(RSA_F_RSA_PUBLIC_ENCRYPT, RSA_R_NON_FIPS_RSA_METHOD); | |
| 83 return -1; | |
| 84 } | |
| 85 #endif | |
| 86 return(rsa->meth->rsa_pub_enc(flen, from, to, rsa, padding)); | |
| 87 } | |
| 88 | |
| 89 int RSA_private_encrypt(int flen, const unsigned char *from, unsigned char *to, | |
| 90 RSA *rsa, int padding) | |
| 91 { | |
| 92 #ifdef OPENSSL_FIPS | |
| 93 if (FIPS_mode() && !(rsa->meth->flags & RSA_FLAG_FIPS_METHOD) | |
| 94 && !(rsa->flags & RSA_FLAG_NON_FIPS_ALLOW)) | |
| 95 { | |
| 96 RSAerr(RSA_F_RSA_PRIVATE_ENCRYPT, RSA_R_NON_FIPS_RSA_METHOD); | |
| 97 return -1; | |
| 98 } | |
| 99 #endif | |
| 100 return(rsa->meth->rsa_priv_enc(flen, from, to, rsa, padding)); | |
| 101 } | |
| 102 | |
| 103 int RSA_private_decrypt(int flen, const unsigned char *from, unsigned char *to, | |
| 104 RSA *rsa, int padding) | |
| 105 { | |
| 106 #ifdef OPENSSL_FIPS | |
| 107 if (FIPS_mode() && !(rsa->meth->flags & RSA_FLAG_FIPS_METHOD) | |
| 108 && !(rsa->flags & RSA_FLAG_NON_FIPS_ALLOW)) | |
| 109 { | |
| 110 RSAerr(RSA_F_RSA_PRIVATE_DECRYPT, RSA_R_NON_FIPS_RSA_METHOD); | |
| 111 return -1; | |
| 112 } | |
| 113 #endif | |
| 114 return(rsa->meth->rsa_priv_dec(flen, from, to, rsa, padding)); | |
| 115 } | |
| 116 | |
| 117 int RSA_public_decrypt(int flen, const unsigned char *from, unsigned char *to, | |
| 118 RSA *rsa, int padding) | |
| 119 { | |
| 120 #ifdef OPENSSL_FIPS | |
| 121 if (FIPS_mode() && !(rsa->meth->flags & RSA_FLAG_FIPS_METHOD) | |
| 122 && !(rsa->flags & RSA_FLAG_NON_FIPS_ALLOW)) | |
| 123 { | |
| 124 RSAerr(RSA_F_RSA_PUBLIC_DECRYPT, RSA_R_NON_FIPS_RSA_METHOD); | |
| 125 return -1; | |
| 126 } | |
| 127 #endif | |
| 128 return(rsa->meth->rsa_pub_dec(flen, from, to, rsa, padding)); | |
| 129 } | |
| 130 | |
| 131 int RSA_flags(const RSA *r) | |
| 132 { | |
| 133 return((r == NULL)?0:r->meth->flags); | |
| 134 } | |
| 135 | |
| 136 void RSA_blinding_off(RSA *rsa) | |
| 137 { | |
| 138 if (rsa->blinding != NULL) | |
| 139 { | |
| 140 BN_BLINDING_free(rsa->blinding); | |
| 141 rsa->blinding=NULL; | |
| 142 } | |
| 143 rsa->flags &= ~RSA_FLAG_BLINDING; | |
| 144 rsa->flags |= RSA_FLAG_NO_BLINDING; | |
| 145 } | |
| 146 | |
| 147 int RSA_blinding_on(RSA *rsa, BN_CTX *ctx) | |
| 148 { | |
| 149 int ret=0; | |
| 150 | |
| 151 if (rsa->blinding != NULL) | |
| 152 RSA_blinding_off(rsa); | |
| 153 | |
| 154 rsa->blinding = RSA_setup_blinding(rsa, ctx); | |
| 155 if (rsa->blinding == NULL) | |
| 156 goto err; | |
| 157 | |
| 158 rsa->flags |= RSA_FLAG_BLINDING; | |
| 159 rsa->flags &= ~RSA_FLAG_NO_BLINDING; | |
| 160 ret=1; | |
| 161 err: | |
| 162 return(ret); | |
| 163 } | |
| 164 | |
| 165 static BIGNUM *rsa_get_public_exp(const BIGNUM *d, const BIGNUM *p, | |
| 166 const BIGNUM *q, BN_CTX *ctx) | |
| 167 { | |
| 168 BIGNUM *ret = NULL, *r0, *r1, *r2; | |
| 169 | |
| 170 if (d == NULL || p == NULL || q == NULL) | |
| 171 return NULL; | |
| 172 | |
| 173 BN_CTX_start(ctx); | |
| 174 r0 = BN_CTX_get(ctx); | |
| 175 r1 = BN_CTX_get(ctx); | |
| 176 r2 = BN_CTX_get(ctx); | |
| 177 if (r2 == NULL) | |
| 178 goto err; | |
| 179 | |
| 180 if (!BN_sub(r1, p, BN_value_one())) goto err; | |
| 181 if (!BN_sub(r2, q, BN_value_one())) goto err; | |
| 182 if (!BN_mul(r0, r1, r2, ctx)) goto err; | |
| 183 | |
| 184 ret = BN_mod_inverse(NULL, d, r0, ctx); | |
| 185 err: | |
| 186 BN_CTX_end(ctx); | |
| 187 return ret; | |
| 188 } | |
| 189 | |
| 190 BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *in_ctx) | |
| 191 { | |
| 192 BIGNUM local_n; | |
| 193 BIGNUM *e,*n; | |
| 194 BN_CTX *ctx; | |
| 195 BN_BLINDING *ret = NULL; | |
| 196 | |
| 197 if (in_ctx == NULL) | |
| 198 { | |
| 199 if ((ctx = BN_CTX_new()) == NULL) return 0; | |
| 200 } | |
| 201 else | |
| 202 ctx = in_ctx; | |
| 203 | |
| 204 BN_CTX_start(ctx); | |
| 205 e = BN_CTX_get(ctx); | |
| 206 if (e == NULL) | |
| 207 { | |
| 208 RSAerr(RSA_F_RSA_SETUP_BLINDING, ERR_R_MALLOC_FAILURE); | |
| 209 goto err; | |
| 210 } | |
| 211 | |
| 212 if (rsa->e == NULL) | |
| 213 { | |
| 214 e = rsa_get_public_exp(rsa->d, rsa->p, rsa->q, ctx); | |
| 215 if (e == NULL) | |
| 216 { | |
| 217 RSAerr(RSA_F_RSA_SETUP_BLINDING, RSA_R_NO_PUBLIC_EXPONEN
T); | |
| 218 goto err; | |
| 219 } | |
| 220 } | |
| 221 else | |
| 222 e = rsa->e; | |
| 223 | |
| 224 | |
| 225 if ((RAND_status() == 0) && rsa->d != NULL && rsa->d->d != NULL) | |
| 226 { | |
| 227 /* if PRNG is not properly seeded, resort to secret | |
| 228 * exponent as unpredictable seed */ | |
| 229 RAND_add(rsa->d->d, rsa->d->dmax * sizeof rsa->d->d[0], 0.0); | |
| 230 } | |
| 231 | |
| 232 if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) | |
| 233 { | |
| 234 /* Set BN_FLG_CONSTTIME flag */ | |
| 235 n = &local_n; | |
| 236 BN_with_flags(n, rsa->n, BN_FLG_CONSTTIME); | |
| 237 } | |
| 238 else | |
| 239 n = rsa->n; | |
| 240 | |
| 241 ret = BN_BLINDING_create_param(NULL, e, n, ctx, | |
| 242 rsa->meth->bn_mod_exp, rsa->_method_mod_n); | |
| 243 if (ret == NULL) | |
| 244 { | |
| 245 RSAerr(RSA_F_RSA_SETUP_BLINDING, ERR_R_BN_LIB); | |
| 246 goto err; | |
| 247 } | |
| 248 CRYPTO_THREADID_current(BN_BLINDING_thread_id(ret)); | |
| 249 err: | |
| 250 BN_CTX_end(ctx); | |
| 251 if (in_ctx == NULL) | |
| 252 BN_CTX_free(ctx); | |
| 253 if(rsa->e == NULL) | |
| 254 BN_free(e); | |
| 255 | |
| 256 return ret; | |
| 257 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master