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| 1 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL | |
| 2 * project 2006. | |
| 3 */ | |
| 4 /* ==================================================================== | |
| 5 * Copyright (c) 2006 The OpenSSL Project. All rights reserved. | |
| 6 * | |
| 7 * Redistribution and use in source and binary forms, with or without | |
| 8 * modification, are permitted provided that the following conditions | |
| 9 * are met: | |
| 10 * | |
| 11 * 1. Redistributions of source code must retain the above copyright | |
| 12 * notice, this list of conditions and the following disclaimer. | |
| 13 * | |
| 14 * 2. Redistributions in binary form must reproduce the above copyright | |
| 15 * notice, this list of conditions and the following disclaimer in | |
| 16 * the documentation and/or other materials provided with the | |
| 17 * distribution. | |
| 18 * | |
| 19 * 3. All advertising materials mentioning features or use of this | |
| 20 * software must display the following acknowledgment: | |
| 21 * "This product includes software developed by the OpenSSL Project | |
| 22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
| 23 * | |
| 24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
| 25 * endorse or promote products derived from this software without | |
| 26 * prior written permission. For written permission, please contact | |
| 27 * licensing@OpenSSL.org. | |
| 28 * | |
| 29 * 5. Products derived from this software may not be called "OpenSSL" | |
| 30 * nor may "OpenSSL" appear in their names without prior written | |
| 31 * permission of the OpenSSL Project. | |
| 32 * | |
| 33 * 6. Redistributions of any form whatsoever must retain the following | |
| 34 * acknowledgment: | |
| 35 * "This product includes software developed by the OpenSSL Project | |
| 36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
| 37 * | |
| 38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
| 39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
| 42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 49 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 50 * ==================================================================== | |
| 51 * | |
| 52 * This product includes cryptographic software written by Eric Young | |
| 53 * (eay@cryptsoft.com). This product includes software written by Tim | |
| 54 * Hudson (tjh@cryptsoft.com). | |
| 55 * | |
| 56 */ | |
| 57 | |
| 58 #include <stdio.h> | |
| 59 #include "cryptlib.h" | |
| 60 #include <openssl/asn1t.h> | |
| 61 #include <openssl/x509.h> | |
| 62 #include <openssl/evp.h> | |
| 63 #include <openssl/dh.h> | |
| 64 #include <openssl/bn.h> | |
| 65 #include "evp_locl.h" | |
| 66 | |
| 67 /* DH pkey context structure */ | |
| 68 | |
| 69 typedef struct | |
| 70 { | |
| 71 /* Parameter gen parameters */ | |
| 72 int prime_len; | |
| 73 int generator; | |
| 74 int use_dsa; | |
| 75 /* Keygen callback info */ | |
| 76 int gentmp[2]; | |
| 77 /* message digest */ | |
| 78 } DH_PKEY_CTX; | |
| 79 | |
| 80 static int pkey_dh_init(EVP_PKEY_CTX *ctx) | |
| 81 { | |
| 82 DH_PKEY_CTX *dctx; | |
| 83 dctx = OPENSSL_malloc(sizeof(DH_PKEY_CTX)); | |
| 84 if (!dctx) | |
| 85 return 0; | |
| 86 dctx->prime_len = 1024; | |
| 87 dctx->generator = 2; | |
| 88 dctx->use_dsa = 0; | |
| 89 | |
| 90 ctx->data = dctx; | |
| 91 ctx->keygen_info = dctx->gentmp; | |
| 92 ctx->keygen_info_count = 2; | |
| 93 | |
| 94 return 1; | |
| 95 } | |
| 96 | |
| 97 static int pkey_dh_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src) | |
| 98 { | |
| 99 DH_PKEY_CTX *dctx, *sctx; | |
| 100 if (!pkey_dh_init(dst)) | |
| 101 return 0; | |
| 102 sctx = src->data; | |
| 103 dctx = dst->data; | |
| 104 dctx->prime_len = sctx->prime_len; | |
| 105 dctx->generator = sctx->generator; | |
| 106 dctx->use_dsa = sctx->use_dsa; | |
| 107 return 1; | |
| 108 } | |
| 109 | |
| 110 static void pkey_dh_cleanup(EVP_PKEY_CTX *ctx) | |
| 111 { | |
| 112 DH_PKEY_CTX *dctx = ctx->data; | |
| 113 if (dctx) | |
| 114 OPENSSL_free(dctx); | |
| 115 } | |
| 116 | |
| 117 static int pkey_dh_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) | |
| 118 { | |
| 119 DH_PKEY_CTX *dctx = ctx->data; | |
| 120 switch (type) | |
| 121 { | |
| 122 case EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN: | |
| 123 if (p1 < 256) | |
| 124 return -2; | |
| 125 dctx->prime_len = p1; | |
| 126 return 1; | |
| 127 | |
| 128 case EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR: | |
| 129 dctx->generator = p1; | |
| 130 return 1; | |
| 131 | |
| 132 case EVP_PKEY_CTRL_PEER_KEY: | |
| 133 /* Default behaviour is OK */ | |
| 134 return 1; | |
| 135 | |
| 136 default: | |
| 137 return -2; | |
| 138 | |
| 139 } | |
| 140 } | |
| 141 | |
| 142 | |
| 143 static int pkey_dh_ctrl_str(EVP_PKEY_CTX *ctx, | |
| 144 const char *type, const char *value) | |
| 145 { | |
| 146 if (!strcmp(type, "dh_paramgen_prime_len")) | |
| 147 { | |
| 148 int len; | |
| 149 len = atoi(value); | |
| 150 return EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len); | |
| 151 } | |
| 152 if (!strcmp(type, "dh_paramgen_generator")) | |
| 153 { | |
| 154 int len; | |
| 155 len = atoi(value); | |
| 156 return EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, len); | |
| 157 } | |
| 158 return -2; | |
| 159 } | |
| 160 | |
| 161 static int pkey_dh_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) | |
| 162 { | |
| 163 DH *dh = NULL; | |
| 164 DH_PKEY_CTX *dctx = ctx->data; | |
| 165 BN_GENCB *pcb, cb; | |
| 166 int ret; | |
| 167 if (ctx->pkey_gencb) | |
| 168 { | |
| 169 pcb = &cb; | |
| 170 evp_pkey_set_cb_translate(pcb, ctx); | |
| 171 } | |
| 172 else | |
| 173 pcb = NULL; | |
| 174 dh = DH_new(); | |
| 175 if (!dh) | |
| 176 return 0; | |
| 177 ret = DH_generate_parameters_ex(dh, | |
| 178 dctx->prime_len, dctx->generator, pcb); | |
| 179 if (ret) | |
| 180 EVP_PKEY_assign_DH(pkey, dh); | |
| 181 else | |
| 182 DH_free(dh); | |
| 183 return ret; | |
| 184 } | |
| 185 | |
| 186 static int pkey_dh_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) | |
| 187 { | |
| 188 DH *dh = NULL; | |
| 189 if (ctx->pkey == NULL) | |
| 190 { | |
| 191 DHerr(DH_F_PKEY_DH_KEYGEN, DH_R_NO_PARAMETERS_SET); | |
| 192 return 0; | |
| 193 } | |
| 194 dh = DH_new(); | |
| 195 if (!dh) | |
| 196 return 0; | |
| 197 EVP_PKEY_assign_DH(pkey, dh); | |
| 198 /* Note: if error return, pkey is freed by parent routine */ | |
| 199 if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey)) | |
| 200 return 0; | |
| 201 return DH_generate_key(pkey->pkey.dh); | |
| 202 } | |
| 203 | |
| 204 static int pkey_dh_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen) | |
| 205 { | |
| 206 int ret; | |
| 207 if (!ctx->pkey || !ctx->peerkey) | |
| 208 { | |
| 209 DHerr(DH_F_PKEY_DH_DERIVE, DH_R_KEYS_NOT_SET); | |
| 210 return 0; | |
| 211 } | |
| 212 ret = DH_compute_key(key, ctx->peerkey->pkey.dh->pub_key, | |
| 213 ctx->pkey->pkey.dh); | |
| 214 if (ret < 0) | |
| 215 return ret; | |
| 216 *keylen = ret; | |
| 217 return 1; | |
| 218 } | |
| 219 | |
| 220 const EVP_PKEY_METHOD dh_pkey_meth = | |
| 221 { | |
| 222 EVP_PKEY_DH, | |
| 223 EVP_PKEY_FLAG_AUTOARGLEN, | |
| 224 pkey_dh_init, | |
| 225 pkey_dh_copy, | |
| 226 pkey_dh_cleanup, | |
| 227 | |
| 228 0, | |
| 229 pkey_dh_paramgen, | |
| 230 | |
| 231 0, | |
| 232 pkey_dh_keygen, | |
| 233 | |
| 234 0, | |
| 235 0, | |
| 236 | |
| 237 0, | |
| 238 0, | |
| 239 | |
| 240 0,0, | |
| 241 | |
| 242 0,0,0,0, | |
| 243 | |
| 244 0,0, | |
| 245 | |
| 246 0,0, | |
| 247 | |
| 248 0, | |
| 249 pkey_dh_derive, | |
| 250 | |
| 251 pkey_dh_ctrl, | |
| 252 pkey_dh_ctrl_str | |
| 253 | |
| 254 }; | |
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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