[331] | 1 | /*
|
---|
| 2 | * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
|
---|
| 3 | *
|
---|
| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
|
---|
| 5 | * this file except in compliance with the License. You can obtain a copy
|
---|
| 6 | * in the file LICENSE in the source distribution or at
|
---|
| 7 | * https://www.openssl.org/source/license.html
|
---|
| 8 | */
|
---|
| 9 |
|
---|
| 10 | #include <stdio.h>
|
---|
| 11 | #include "internal/cryptlib.h"
|
---|
| 12 | #include <openssl/x509.h>
|
---|
| 13 | #include <openssl/asn1.h>
|
---|
| 14 | #include "dh_locl.h"
|
---|
| 15 | #include <openssl/bn.h>
|
---|
| 16 | #include "internal/asn1_int.h"
|
---|
| 17 | #include "internal/evp_int.h"
|
---|
| 18 | #include <openssl/cms.h>
|
---|
| 19 |
|
---|
| 20 | /*
|
---|
| 21 | * i2d/d2i like DH parameter functions which use the appropriate routine for
|
---|
| 22 | * PKCS#3 DH or X9.42 DH.
|
---|
| 23 | */
|
---|
| 24 |
|
---|
| 25 | static DH *d2i_dhp(const EVP_PKEY *pkey, const unsigned char **pp,
|
---|
| 26 | long length)
|
---|
| 27 | {
|
---|
| 28 | if (pkey->ameth == &dhx_asn1_meth)
|
---|
| 29 | return d2i_DHxparams(NULL, pp, length);
|
---|
| 30 | return d2i_DHparams(NULL, pp, length);
|
---|
| 31 | }
|
---|
| 32 |
|
---|
| 33 | static int i2d_dhp(const EVP_PKEY *pkey, const DH *a, unsigned char **pp)
|
---|
| 34 | {
|
---|
| 35 | if (pkey->ameth == &dhx_asn1_meth)
|
---|
| 36 | return i2d_DHxparams(a, pp);
|
---|
| 37 | return i2d_DHparams(a, pp);
|
---|
| 38 | }
|
---|
| 39 |
|
---|
| 40 | static void int_dh_free(EVP_PKEY *pkey)
|
---|
| 41 | {
|
---|
| 42 | DH_free(pkey->pkey.dh);
|
---|
| 43 | }
|
---|
| 44 |
|
---|
| 45 | static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
|
---|
| 46 | {
|
---|
| 47 | const unsigned char *p, *pm;
|
---|
| 48 | int pklen, pmlen;
|
---|
| 49 | int ptype;
|
---|
| 50 | const void *pval;
|
---|
| 51 | const ASN1_STRING *pstr;
|
---|
| 52 | X509_ALGOR *palg;
|
---|
| 53 | ASN1_INTEGER *public_key = NULL;
|
---|
| 54 |
|
---|
| 55 | DH *dh = NULL;
|
---|
| 56 |
|
---|
| 57 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
|
---|
| 58 | return 0;
|
---|
| 59 | X509_ALGOR_get0(NULL, &ptype, &pval, palg);
|
---|
| 60 |
|
---|
| 61 | if (ptype != V_ASN1_SEQUENCE) {
|
---|
| 62 | DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR);
|
---|
| 63 | goto err;
|
---|
| 64 | }
|
---|
| 65 |
|
---|
| 66 | pstr = pval;
|
---|
| 67 | pm = pstr->data;
|
---|
| 68 | pmlen = pstr->length;
|
---|
| 69 |
|
---|
| 70 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) {
|
---|
| 71 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR);
|
---|
| 72 | goto err;
|
---|
| 73 | }
|
---|
| 74 |
|
---|
| 75 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) {
|
---|
| 76 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR);
|
---|
| 77 | goto err;
|
---|
| 78 | }
|
---|
| 79 |
|
---|
| 80 | /* We have parameters now set public key */
|
---|
| 81 | if ((dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) {
|
---|
| 82 | DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR);
|
---|
| 83 | goto err;
|
---|
| 84 | }
|
---|
| 85 |
|
---|
| 86 | ASN1_INTEGER_free(public_key);
|
---|
| 87 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
|
---|
| 88 | return 1;
|
---|
| 89 |
|
---|
| 90 | err:
|
---|
| 91 | ASN1_INTEGER_free(public_key);
|
---|
| 92 | DH_free(dh);
|
---|
| 93 | return 0;
|
---|
| 94 |
|
---|
| 95 | }
|
---|
| 96 |
|
---|
| 97 | static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
|
---|
| 98 | {
|
---|
| 99 | DH *dh;
|
---|
| 100 | int ptype;
|
---|
| 101 | unsigned char *penc = NULL;
|
---|
| 102 | int penclen;
|
---|
| 103 | ASN1_STRING *str;
|
---|
| 104 | ASN1_INTEGER *pub_key = NULL;
|
---|
| 105 |
|
---|
| 106 | dh = pkey->pkey.dh;
|
---|
| 107 |
|
---|
| 108 | str = ASN1_STRING_new();
|
---|
| 109 | if (str == NULL) {
|
---|
| 110 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
|
---|
| 111 | goto err;
|
---|
| 112 | }
|
---|
| 113 | str->length = i2d_dhp(pkey, dh, &str->data);
|
---|
| 114 | if (str->length <= 0) {
|
---|
| 115 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
|
---|
| 116 | goto err;
|
---|
| 117 | }
|
---|
| 118 | ptype = V_ASN1_SEQUENCE;
|
---|
| 119 |
|
---|
| 120 | pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL);
|
---|
| 121 | if (!pub_key)
|
---|
| 122 | goto err;
|
---|
| 123 |
|
---|
| 124 | penclen = i2d_ASN1_INTEGER(pub_key, &penc);
|
---|
| 125 |
|
---|
| 126 | ASN1_INTEGER_free(pub_key);
|
---|
| 127 |
|
---|
| 128 | if (penclen <= 0) {
|
---|
| 129 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
|
---|
| 130 | goto err;
|
---|
| 131 | }
|
---|
| 132 |
|
---|
| 133 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id),
|
---|
| 134 | ptype, str, penc, penclen))
|
---|
| 135 | return 1;
|
---|
| 136 |
|
---|
| 137 | err:
|
---|
| 138 | OPENSSL_free(penc);
|
---|
| 139 | ASN1_STRING_free(str);
|
---|
| 140 |
|
---|
| 141 | return 0;
|
---|
| 142 | }
|
---|
| 143 |
|
---|
| 144 | /*
|
---|
| 145 | * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that
|
---|
| 146 | * the AlgorithmIdentifier contains the parameters, the private key is
|
---|
| 147 | * explicitly included and the pubkey must be recalculated.
|
---|
| 148 | */
|
---|
| 149 |
|
---|
| 150 | static int dh_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
|
---|
| 151 | {
|
---|
| 152 | const unsigned char *p, *pm;
|
---|
| 153 | int pklen, pmlen;
|
---|
| 154 | int ptype;
|
---|
| 155 | const void *pval;
|
---|
| 156 | const ASN1_STRING *pstr;
|
---|
| 157 | const X509_ALGOR *palg;
|
---|
| 158 | ASN1_INTEGER *privkey = NULL;
|
---|
| 159 |
|
---|
| 160 | DH *dh = NULL;
|
---|
| 161 |
|
---|
| 162 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
|
---|
| 163 | return 0;
|
---|
| 164 |
|
---|
| 165 | X509_ALGOR_get0(NULL, &ptype, &pval, palg);
|
---|
| 166 |
|
---|
| 167 | if (ptype != V_ASN1_SEQUENCE)
|
---|
| 168 | goto decerr;
|
---|
| 169 | if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL)
|
---|
| 170 | goto decerr;
|
---|
| 171 |
|
---|
| 172 | pstr = pval;
|
---|
| 173 | pm = pstr->data;
|
---|
| 174 | pmlen = pstr->length;
|
---|
| 175 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL)
|
---|
| 176 | goto decerr;
|
---|
| 177 |
|
---|
| 178 | /* We have parameters now set private key */
|
---|
| 179 | if ((dh->priv_key = BN_secure_new()) == NULL
|
---|
| 180 | || !ASN1_INTEGER_to_BN(privkey, dh->priv_key)) {
|
---|
| 181 | DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR);
|
---|
| 182 | goto dherr;
|
---|
| 183 | }
|
---|
| 184 | /* Calculate public key */
|
---|
| 185 | if (!DH_generate_key(dh))
|
---|
| 186 | goto dherr;
|
---|
| 187 |
|
---|
| 188 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
|
---|
| 189 |
|
---|
| 190 | ASN1_STRING_clear_free(privkey);
|
---|
| 191 |
|
---|
| 192 | return 1;
|
---|
| 193 |
|
---|
| 194 | decerr:
|
---|
| 195 | DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR);
|
---|
| 196 | dherr:
|
---|
| 197 | DH_free(dh);
|
---|
| 198 | ASN1_STRING_clear_free(privkey);
|
---|
| 199 | return 0;
|
---|
| 200 | }
|
---|
| 201 |
|
---|
| 202 | static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
|
---|
| 203 | {
|
---|
| 204 | ASN1_STRING *params = NULL;
|
---|
| 205 | ASN1_INTEGER *prkey = NULL;
|
---|
| 206 | unsigned char *dp = NULL;
|
---|
| 207 | int dplen;
|
---|
| 208 |
|
---|
| 209 | params = ASN1_STRING_new();
|
---|
| 210 |
|
---|
| 211 | if (params == NULL) {
|
---|
| 212 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
|
---|
| 213 | goto err;
|
---|
| 214 | }
|
---|
| 215 |
|
---|
| 216 | params->length = i2d_dhp(pkey, pkey->pkey.dh, ¶ms->data);
|
---|
| 217 | if (params->length <= 0) {
|
---|
| 218 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
|
---|
| 219 | goto err;
|
---|
| 220 | }
|
---|
| 221 | params->type = V_ASN1_SEQUENCE;
|
---|
| 222 |
|
---|
| 223 | /* Get private key into integer */
|
---|
| 224 | prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL);
|
---|
| 225 |
|
---|
| 226 | if (!prkey) {
|
---|
| 227 | DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR);
|
---|
| 228 | goto err;
|
---|
| 229 | }
|
---|
| 230 |
|
---|
| 231 | dplen = i2d_ASN1_INTEGER(prkey, &dp);
|
---|
| 232 |
|
---|
| 233 | ASN1_STRING_clear_free(prkey);
|
---|
| 234 | prkey = NULL;
|
---|
| 235 |
|
---|
| 236 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
|
---|
| 237 | V_ASN1_SEQUENCE, params, dp, dplen))
|
---|
| 238 | goto err;
|
---|
| 239 |
|
---|
| 240 | return 1;
|
---|
| 241 |
|
---|
| 242 | err:
|
---|
| 243 | OPENSSL_free(dp);
|
---|
| 244 | ASN1_STRING_free(params);
|
---|
| 245 | ASN1_STRING_clear_free(prkey);
|
---|
| 246 | return 0;
|
---|
| 247 | }
|
---|
| 248 |
|
---|
| 249 | static int dh_param_decode(EVP_PKEY *pkey,
|
---|
| 250 | const unsigned char **pder, int derlen)
|
---|
| 251 | {
|
---|
| 252 | DH *dh;
|
---|
| 253 |
|
---|
| 254 | if ((dh = d2i_dhp(pkey, pder, derlen)) == NULL) {
|
---|
| 255 | DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB);
|
---|
| 256 | return 0;
|
---|
| 257 | }
|
---|
| 258 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
|
---|
| 259 | return 1;
|
---|
| 260 | }
|
---|
| 261 |
|
---|
| 262 | static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
|
---|
| 263 | {
|
---|
| 264 | return i2d_dhp(pkey, pkey->pkey.dh, pder);
|
---|
| 265 | }
|
---|
| 266 |
|
---|
| 267 | static int do_dh_print(BIO *bp, const DH *x, int indent, int ptype)
|
---|
| 268 | {
|
---|
| 269 | int reason = ERR_R_BUF_LIB;
|
---|
| 270 | const char *ktype = NULL;
|
---|
| 271 | BIGNUM *priv_key, *pub_key;
|
---|
| 272 |
|
---|
| 273 | if (ptype == 2)
|
---|
| 274 | priv_key = x->priv_key;
|
---|
| 275 | else
|
---|
| 276 | priv_key = NULL;
|
---|
| 277 |
|
---|
| 278 | if (ptype > 0)
|
---|
| 279 | pub_key = x->pub_key;
|
---|
| 280 | else
|
---|
| 281 | pub_key = NULL;
|
---|
| 282 |
|
---|
| 283 | if (x->p == NULL || (ptype == 2 && priv_key == NULL)
|
---|
| 284 | || (ptype > 0 && pub_key == NULL)) {
|
---|
| 285 | reason = ERR_R_PASSED_NULL_PARAMETER;
|
---|
| 286 | goto err;
|
---|
| 287 | }
|
---|
| 288 |
|
---|
| 289 | if (ptype == 2)
|
---|
| 290 | ktype = "DH Private-Key";
|
---|
| 291 | else if (ptype == 1)
|
---|
| 292 | ktype = "DH Public-Key";
|
---|
| 293 | else
|
---|
| 294 | ktype = "DH Parameters";
|
---|
| 295 |
|
---|
| 296 | BIO_indent(bp, indent, 128);
|
---|
| 297 | if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p)) <= 0)
|
---|
| 298 | goto err;
|
---|
| 299 | indent += 4;
|
---|
| 300 |
|
---|
| 301 | if (!ASN1_bn_print(bp, "private-key:", priv_key, NULL, indent))
|
---|
| 302 | goto err;
|
---|
| 303 | if (!ASN1_bn_print(bp, "public-key:", pub_key, NULL, indent))
|
---|
| 304 | goto err;
|
---|
| 305 |
|
---|
| 306 | if (!ASN1_bn_print(bp, "prime:", x->p, NULL, indent))
|
---|
| 307 | goto err;
|
---|
| 308 | if (!ASN1_bn_print(bp, "generator:", x->g, NULL, indent))
|
---|
| 309 | goto err;
|
---|
| 310 | if (x->q && !ASN1_bn_print(bp, "subgroup order:", x->q, NULL, indent))
|
---|
| 311 | goto err;
|
---|
| 312 | if (x->j && !ASN1_bn_print(bp, "subgroup factor:", x->j, NULL, indent))
|
---|
| 313 | goto err;
|
---|
| 314 | if (x->seed) {
|
---|
| 315 | int i;
|
---|
| 316 | BIO_indent(bp, indent, 128);
|
---|
| 317 | BIO_puts(bp, "seed:");
|
---|
| 318 | for (i = 0; i < x->seedlen; i++) {
|
---|
| 319 | if ((i % 15) == 0) {
|
---|
| 320 | if (BIO_puts(bp, "\n") <= 0
|
---|
| 321 | || !BIO_indent(bp, indent + 4, 128))
|
---|
| 322 | goto err;
|
---|
| 323 | }
|
---|
| 324 | if (BIO_printf(bp, "%02x%s", x->seed[i],
|
---|
| 325 | ((i + 1) == x->seedlen) ? "" : ":") <= 0)
|
---|
| 326 | goto err;
|
---|
| 327 | }
|
---|
| 328 | if (BIO_write(bp, "\n", 1) <= 0)
|
---|
| 329 | return (0);
|
---|
| 330 | }
|
---|
| 331 | if (x->counter && !ASN1_bn_print(bp, "counter:", x->counter, NULL, indent))
|
---|
| 332 | goto err;
|
---|
| 333 | if (x->length != 0) {
|
---|
| 334 | BIO_indent(bp, indent, 128);
|
---|
| 335 | if (BIO_printf(bp, "recommended-private-length: %d bits\n",
|
---|
| 336 | (int)x->length) <= 0)
|
---|
| 337 | goto err;
|
---|
| 338 | }
|
---|
| 339 |
|
---|
| 340 | return 1;
|
---|
| 341 |
|
---|
| 342 | err:
|
---|
| 343 | DHerr(DH_F_DO_DH_PRINT, reason);
|
---|
| 344 | return 0;
|
---|
| 345 | }
|
---|
| 346 |
|
---|
| 347 | static int int_dh_size(const EVP_PKEY *pkey)
|
---|
| 348 | {
|
---|
| 349 | return (DH_size(pkey->pkey.dh));
|
---|
| 350 | }
|
---|
| 351 |
|
---|
| 352 | static int dh_bits(const EVP_PKEY *pkey)
|
---|
| 353 | {
|
---|
| 354 | return BN_num_bits(pkey->pkey.dh->p);
|
---|
| 355 | }
|
---|
| 356 |
|
---|
| 357 | static int dh_security_bits(const EVP_PKEY *pkey)
|
---|
| 358 | {
|
---|
| 359 | return DH_security_bits(pkey->pkey.dh);
|
---|
| 360 | }
|
---|
| 361 |
|
---|
| 362 | static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
|
---|
| 363 | {
|
---|
| 364 | if (BN_cmp(a->pkey.dh->p, b->pkey.dh->p) ||
|
---|
| 365 | BN_cmp(a->pkey.dh->g, b->pkey.dh->g))
|
---|
| 366 | return 0;
|
---|
| 367 | else if (a->ameth == &dhx_asn1_meth) {
|
---|
| 368 | if (BN_cmp(a->pkey.dh->q, b->pkey.dh->q))
|
---|
| 369 | return 0;
|
---|
| 370 | }
|
---|
| 371 | return 1;
|
---|
| 372 | }
|
---|
| 373 |
|
---|
| 374 | static int int_dh_bn_cpy(BIGNUM **dst, const BIGNUM *src)
|
---|
| 375 | {
|
---|
| 376 | BIGNUM *a;
|
---|
| 377 | if (src) {
|
---|
| 378 | a = BN_dup(src);
|
---|
| 379 | if (!a)
|
---|
| 380 | return 0;
|
---|
| 381 | } else
|
---|
| 382 | a = NULL;
|
---|
| 383 | BN_free(*dst);
|
---|
| 384 | *dst = a;
|
---|
| 385 | return 1;
|
---|
| 386 | }
|
---|
| 387 |
|
---|
| 388 | static int int_dh_param_copy(DH *to, const DH *from, int is_x942)
|
---|
| 389 | {
|
---|
| 390 | if (is_x942 == -1)
|
---|
| 391 | is_x942 = ! !from->q;
|
---|
| 392 | if (!int_dh_bn_cpy(&to->p, from->p))
|
---|
| 393 | return 0;
|
---|
| 394 | if (!int_dh_bn_cpy(&to->g, from->g))
|
---|
| 395 | return 0;
|
---|
| 396 | if (is_x942) {
|
---|
| 397 | if (!int_dh_bn_cpy(&to->q, from->q))
|
---|
| 398 | return 0;
|
---|
| 399 | if (!int_dh_bn_cpy(&to->j, from->j))
|
---|
| 400 | return 0;
|
---|
| 401 | OPENSSL_free(to->seed);
|
---|
| 402 | to->seed = NULL;
|
---|
| 403 | to->seedlen = 0;
|
---|
| 404 | if (from->seed) {
|
---|
| 405 | to->seed = OPENSSL_memdup(from->seed, from->seedlen);
|
---|
| 406 | if (!to->seed)
|
---|
| 407 | return 0;
|
---|
| 408 | to->seedlen = from->seedlen;
|
---|
| 409 | }
|
---|
| 410 | } else
|
---|
| 411 | to->length = from->length;
|
---|
| 412 | return 1;
|
---|
| 413 | }
|
---|
| 414 |
|
---|
| 415 | DH *DHparams_dup(DH *dh)
|
---|
| 416 | {
|
---|
| 417 | DH *ret;
|
---|
| 418 | ret = DH_new();
|
---|
| 419 | if (ret == NULL)
|
---|
| 420 | return NULL;
|
---|
| 421 | if (!int_dh_param_copy(ret, dh, -1)) {
|
---|
| 422 | DH_free(ret);
|
---|
| 423 | return NULL;
|
---|
| 424 | }
|
---|
| 425 | return ret;
|
---|
| 426 | }
|
---|
| 427 |
|
---|
| 428 | static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
|
---|
| 429 | {
|
---|
| 430 | if (to->pkey.dh == NULL) {
|
---|
| 431 | to->pkey.dh = DH_new();
|
---|
| 432 | if (to->pkey.dh == NULL)
|
---|
| 433 | return 0;
|
---|
| 434 | }
|
---|
| 435 | return int_dh_param_copy(to->pkey.dh, from->pkey.dh,
|
---|
| 436 | from->ameth == &dhx_asn1_meth);
|
---|
| 437 | }
|
---|
| 438 |
|
---|
| 439 | static int dh_missing_parameters(const EVP_PKEY *a)
|
---|
| 440 | {
|
---|
| 441 | if (a->pkey.dh == NULL || a->pkey.dh->p == NULL || a->pkey.dh->g == NULL)
|
---|
| 442 | return 1;
|
---|
| 443 | return 0;
|
---|
| 444 | }
|
---|
| 445 |
|
---|
| 446 | static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
|
---|
| 447 | {
|
---|
| 448 | if (dh_cmp_parameters(a, b) == 0)
|
---|
| 449 | return 0;
|
---|
| 450 | if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0)
|
---|
| 451 | return 0;
|
---|
| 452 | else
|
---|
| 453 | return 1;
|
---|
| 454 | }
|
---|
| 455 |
|
---|
| 456 | static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
|
---|
| 457 | ASN1_PCTX *ctx)
|
---|
| 458 | {
|
---|
| 459 | return do_dh_print(bp, pkey->pkey.dh, indent, 0);
|
---|
| 460 | }
|
---|
| 461 |
|
---|
| 462 | static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent,
|
---|
| 463 | ASN1_PCTX *ctx)
|
---|
| 464 | {
|
---|
| 465 | return do_dh_print(bp, pkey->pkey.dh, indent, 1);
|
---|
| 466 | }
|
---|
| 467 |
|
---|
| 468 | static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent,
|
---|
| 469 | ASN1_PCTX *ctx)
|
---|
| 470 | {
|
---|
| 471 | return do_dh_print(bp, pkey->pkey.dh, indent, 2);
|
---|
| 472 | }
|
---|
| 473 |
|
---|
| 474 | int DHparams_print(BIO *bp, const DH *x)
|
---|
| 475 | {
|
---|
| 476 | return do_dh_print(bp, x, 4, 0);
|
---|
| 477 | }
|
---|
| 478 |
|
---|
| 479 | #ifndef OPENSSL_NO_CMS
|
---|
| 480 | static int dh_cms_decrypt(CMS_RecipientInfo *ri);
|
---|
| 481 | static int dh_cms_encrypt(CMS_RecipientInfo *ri);
|
---|
| 482 | #endif
|
---|
| 483 |
|
---|
| 484 | static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
|
---|
| 485 | {
|
---|
| 486 | switch (op) {
|
---|
| 487 | #ifndef OPENSSL_NO_CMS
|
---|
| 488 |
|
---|
| 489 | case ASN1_PKEY_CTRL_CMS_ENVELOPE:
|
---|
| 490 | if (arg1 == 1)
|
---|
| 491 | return dh_cms_decrypt(arg2);
|
---|
| 492 | else if (arg1 == 0)
|
---|
| 493 | return dh_cms_encrypt(arg2);
|
---|
| 494 | return -2;
|
---|
| 495 |
|
---|
| 496 | case ASN1_PKEY_CTRL_CMS_RI_TYPE:
|
---|
| 497 | *(int *)arg2 = CMS_RECIPINFO_AGREE;
|
---|
| 498 | return 1;
|
---|
| 499 | #endif
|
---|
| 500 | default:
|
---|
| 501 | return -2;
|
---|
| 502 | }
|
---|
| 503 |
|
---|
| 504 | }
|
---|
| 505 |
|
---|
| 506 | const EVP_PKEY_ASN1_METHOD dh_asn1_meth = {
|
---|
| 507 | EVP_PKEY_DH,
|
---|
| 508 | EVP_PKEY_DH,
|
---|
| 509 | 0,
|
---|
| 510 |
|
---|
| 511 | "DH",
|
---|
| 512 | "OpenSSL PKCS#3 DH method",
|
---|
| 513 |
|
---|
| 514 | dh_pub_decode,
|
---|
| 515 | dh_pub_encode,
|
---|
| 516 | dh_pub_cmp,
|
---|
| 517 | dh_public_print,
|
---|
| 518 |
|
---|
| 519 | dh_priv_decode,
|
---|
| 520 | dh_priv_encode,
|
---|
| 521 | dh_private_print,
|
---|
| 522 |
|
---|
| 523 | int_dh_size,
|
---|
| 524 | dh_bits,
|
---|
| 525 | dh_security_bits,
|
---|
| 526 |
|
---|
| 527 | dh_param_decode,
|
---|
| 528 | dh_param_encode,
|
---|
| 529 | dh_missing_parameters,
|
---|
| 530 | dh_copy_parameters,
|
---|
| 531 | dh_cmp_parameters,
|
---|
| 532 | dh_param_print,
|
---|
| 533 | 0,
|
---|
| 534 |
|
---|
| 535 | int_dh_free,
|
---|
| 536 | 0
|
---|
| 537 | };
|
---|
| 538 |
|
---|
| 539 | const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = {
|
---|
| 540 | EVP_PKEY_DHX,
|
---|
| 541 | EVP_PKEY_DHX,
|
---|
| 542 | 0,
|
---|
| 543 |
|
---|
| 544 | "X9.42 DH",
|
---|
| 545 | "OpenSSL X9.42 DH method",
|
---|
| 546 |
|
---|
| 547 | dh_pub_decode,
|
---|
| 548 | dh_pub_encode,
|
---|
| 549 | dh_pub_cmp,
|
---|
| 550 | dh_public_print,
|
---|
| 551 |
|
---|
| 552 | dh_priv_decode,
|
---|
| 553 | dh_priv_encode,
|
---|
| 554 | dh_private_print,
|
---|
| 555 |
|
---|
| 556 | int_dh_size,
|
---|
| 557 | dh_bits,
|
---|
| 558 | dh_security_bits,
|
---|
| 559 |
|
---|
| 560 | dh_param_decode,
|
---|
| 561 | dh_param_encode,
|
---|
| 562 | dh_missing_parameters,
|
---|
| 563 | dh_copy_parameters,
|
---|
| 564 | dh_cmp_parameters,
|
---|
| 565 | dh_param_print,
|
---|
| 566 | 0,
|
---|
| 567 |
|
---|
| 568 | int_dh_free,
|
---|
| 569 | dh_pkey_ctrl
|
---|
| 570 | };
|
---|
| 571 |
|
---|
| 572 | #ifndef OPENSSL_NO_CMS
|
---|
| 573 |
|
---|
| 574 | static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx,
|
---|
| 575 | X509_ALGOR *alg, ASN1_BIT_STRING *pubkey)
|
---|
| 576 | {
|
---|
| 577 | const ASN1_OBJECT *aoid;
|
---|
| 578 | int atype;
|
---|
| 579 | const void *aval;
|
---|
| 580 | ASN1_INTEGER *public_key = NULL;
|
---|
| 581 | int rv = 0;
|
---|
| 582 | EVP_PKEY *pkpeer = NULL, *pk = NULL;
|
---|
| 583 | DH *dhpeer = NULL;
|
---|
| 584 | const unsigned char *p;
|
---|
| 585 | int plen;
|
---|
| 586 |
|
---|
| 587 | X509_ALGOR_get0(&aoid, &atype, &aval, alg);
|
---|
| 588 | if (OBJ_obj2nid(aoid) != NID_dhpublicnumber)
|
---|
| 589 | goto err;
|
---|
| 590 | /* Only absent parameters allowed in RFC XXXX */
|
---|
| 591 | if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL)
|
---|
| 592 | goto err;
|
---|
| 593 |
|
---|
| 594 | pk = EVP_PKEY_CTX_get0_pkey(pctx);
|
---|
| 595 | if (!pk)
|
---|
| 596 | goto err;
|
---|
| 597 | if (pk->type != EVP_PKEY_DHX)
|
---|
| 598 | goto err;
|
---|
| 599 | /* Get parameters from parent key */
|
---|
| 600 | dhpeer = DHparams_dup(pk->pkey.dh);
|
---|
| 601 | /* We have parameters now set public key */
|
---|
| 602 | plen = ASN1_STRING_length(pubkey);
|
---|
| 603 | p = ASN1_STRING_get0_data(pubkey);
|
---|
| 604 | if (!p || !plen)
|
---|
| 605 | goto err;
|
---|
| 606 |
|
---|
| 607 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, plen)) == NULL) {
|
---|
| 608 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR);
|
---|
| 609 | goto err;
|
---|
| 610 | }
|
---|
| 611 |
|
---|
| 612 | /* We have parameters now set public key */
|
---|
| 613 | if ((dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) {
|
---|
| 614 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR);
|
---|
| 615 | goto err;
|
---|
| 616 | }
|
---|
| 617 |
|
---|
| 618 | pkpeer = EVP_PKEY_new();
|
---|
| 619 | if (pkpeer == NULL)
|
---|
| 620 | goto err;
|
---|
| 621 | EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer);
|
---|
| 622 | dhpeer = NULL;
|
---|
| 623 | if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0)
|
---|
| 624 | rv = 1;
|
---|
| 625 | err:
|
---|
| 626 | ASN1_INTEGER_free(public_key);
|
---|
| 627 | EVP_PKEY_free(pkpeer);
|
---|
| 628 | DH_free(dhpeer);
|
---|
| 629 | return rv;
|
---|
| 630 | }
|
---|
| 631 |
|
---|
| 632 | static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri)
|
---|
| 633 | {
|
---|
| 634 | int rv = 0;
|
---|
| 635 |
|
---|
| 636 | X509_ALGOR *alg, *kekalg = NULL;
|
---|
| 637 | ASN1_OCTET_STRING *ukm;
|
---|
| 638 | const unsigned char *p;
|
---|
| 639 | unsigned char *dukm = NULL;
|
---|
| 640 | size_t dukmlen = 0;
|
---|
| 641 | int keylen, plen;
|
---|
| 642 | const EVP_CIPHER *kekcipher;
|
---|
| 643 | EVP_CIPHER_CTX *kekctx;
|
---|
| 644 |
|
---|
| 645 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm))
|
---|
| 646 | goto err;
|
---|
| 647 |
|
---|
| 648 | /*
|
---|
| 649 | * For DH we only have one OID permissible. If ever any more get defined
|
---|
| 650 | * we will need something cleverer.
|
---|
| 651 | */
|
---|
| 652 | if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) {
|
---|
| 653 | DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR);
|
---|
| 654 | goto err;
|
---|
| 655 | }
|
---|
| 656 |
|
---|
| 657 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0)
|
---|
| 658 | goto err;
|
---|
| 659 |
|
---|
| 660 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0)
|
---|
| 661 | goto err;
|
---|
| 662 |
|
---|
| 663 | if (alg->parameter->type != V_ASN1_SEQUENCE)
|
---|
| 664 | goto err;
|
---|
| 665 |
|
---|
| 666 | p = alg->parameter->value.sequence->data;
|
---|
| 667 | plen = alg->parameter->value.sequence->length;
|
---|
| 668 | kekalg = d2i_X509_ALGOR(NULL, &p, plen);
|
---|
| 669 | if (!kekalg)
|
---|
| 670 | goto err;
|
---|
| 671 | kekctx = CMS_RecipientInfo_kari_get0_ctx(ri);
|
---|
| 672 | if (!kekctx)
|
---|
| 673 | goto err;
|
---|
| 674 | kekcipher = EVP_get_cipherbyobj(kekalg->algorithm);
|
---|
| 675 | if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE)
|
---|
| 676 | goto err;
|
---|
| 677 | if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL))
|
---|
| 678 | goto err;
|
---|
| 679 | if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0)
|
---|
| 680 | goto err;
|
---|
| 681 |
|
---|
| 682 | keylen = EVP_CIPHER_CTX_key_length(kekctx);
|
---|
| 683 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0)
|
---|
| 684 | goto err;
|
---|
| 685 | /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */
|
---|
| 686 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx,
|
---|
| 687 | OBJ_nid2obj(EVP_CIPHER_type(kekcipher)))
|
---|
| 688 | <= 0)
|
---|
| 689 | goto err;
|
---|
| 690 |
|
---|
| 691 | if (ukm) {
|
---|
| 692 | dukmlen = ASN1_STRING_length(ukm);
|
---|
| 693 | dukm = OPENSSL_memdup(ASN1_STRING_get0_data(ukm), dukmlen);
|
---|
| 694 | if (!dukm)
|
---|
| 695 | goto err;
|
---|
| 696 | }
|
---|
| 697 |
|
---|
| 698 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0)
|
---|
| 699 | goto err;
|
---|
| 700 | dukm = NULL;
|
---|
| 701 |
|
---|
| 702 | rv = 1;
|
---|
| 703 | err:
|
---|
| 704 | X509_ALGOR_free(kekalg);
|
---|
| 705 | OPENSSL_free(dukm);
|
---|
| 706 | return rv;
|
---|
| 707 | }
|
---|
| 708 |
|
---|
| 709 | static int dh_cms_decrypt(CMS_RecipientInfo *ri)
|
---|
| 710 | {
|
---|
| 711 | EVP_PKEY_CTX *pctx;
|
---|
| 712 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
|
---|
| 713 | if (!pctx)
|
---|
| 714 | return 0;
|
---|
| 715 | /* See if we need to set peer key */
|
---|
| 716 | if (!EVP_PKEY_CTX_get0_peerkey(pctx)) {
|
---|
| 717 | X509_ALGOR *alg;
|
---|
| 718 | ASN1_BIT_STRING *pubkey;
|
---|
| 719 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey,
|
---|
| 720 | NULL, NULL, NULL))
|
---|
| 721 | return 0;
|
---|
| 722 | if (!alg || !pubkey)
|
---|
| 723 | return 0;
|
---|
| 724 | if (!dh_cms_set_peerkey(pctx, alg, pubkey)) {
|
---|
| 725 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR);
|
---|
| 726 | return 0;
|
---|
| 727 | }
|
---|
| 728 | }
|
---|
| 729 | /* Set DH derivation parameters and initialise unwrap context */
|
---|
| 730 | if (!dh_cms_set_shared_info(pctx, ri)) {
|
---|
| 731 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR);
|
---|
| 732 | return 0;
|
---|
| 733 | }
|
---|
| 734 | return 1;
|
---|
| 735 | }
|
---|
| 736 |
|
---|
| 737 | static int dh_cms_encrypt(CMS_RecipientInfo *ri)
|
---|
| 738 | {
|
---|
| 739 | EVP_PKEY_CTX *pctx;
|
---|
| 740 | EVP_PKEY *pkey;
|
---|
| 741 | EVP_CIPHER_CTX *ctx;
|
---|
| 742 | int keylen;
|
---|
| 743 | X509_ALGOR *talg, *wrap_alg = NULL;
|
---|
| 744 | const ASN1_OBJECT *aoid;
|
---|
| 745 | ASN1_BIT_STRING *pubkey;
|
---|
| 746 | ASN1_STRING *wrap_str;
|
---|
| 747 | ASN1_OCTET_STRING *ukm;
|
---|
| 748 | unsigned char *penc = NULL, *dukm = NULL;
|
---|
| 749 | int penclen;
|
---|
| 750 | size_t dukmlen = 0;
|
---|
| 751 | int rv = 0;
|
---|
| 752 | int kdf_type, wrap_nid;
|
---|
| 753 | const EVP_MD *kdf_md;
|
---|
| 754 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
|
---|
| 755 | if (!pctx)
|
---|
| 756 | return 0;
|
---|
| 757 | /* Get ephemeral key */
|
---|
| 758 | pkey = EVP_PKEY_CTX_get0_pkey(pctx);
|
---|
| 759 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey,
|
---|
| 760 | NULL, NULL, NULL))
|
---|
| 761 | goto err;
|
---|
| 762 | X509_ALGOR_get0(&aoid, NULL, NULL, talg);
|
---|
| 763 | /* Is everything uninitialised? */
|
---|
| 764 | if (aoid == OBJ_nid2obj(NID_undef)) {
|
---|
| 765 | ASN1_INTEGER *pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL);
|
---|
| 766 | if (!pubk)
|
---|
| 767 | goto err;
|
---|
| 768 | /* Set the key */
|
---|
| 769 |
|
---|
| 770 | penclen = i2d_ASN1_INTEGER(pubk, &penc);
|
---|
| 771 | ASN1_INTEGER_free(pubk);
|
---|
| 772 | if (penclen <= 0)
|
---|
| 773 | goto err;
|
---|
| 774 | ASN1_STRING_set0(pubkey, penc, penclen);
|
---|
| 775 | pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
|
---|
| 776 | pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT;
|
---|
| 777 |
|
---|
| 778 | penc = NULL;
|
---|
| 779 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber),
|
---|
| 780 | V_ASN1_UNDEF, NULL);
|
---|
| 781 | }
|
---|
| 782 |
|
---|
| 783 | /* See if custom parameters set */
|
---|
| 784 | kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx);
|
---|
| 785 | if (kdf_type <= 0)
|
---|
| 786 | goto err;
|
---|
| 787 | if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md))
|
---|
| 788 | goto err;
|
---|
| 789 |
|
---|
| 790 | if (kdf_type == EVP_PKEY_DH_KDF_NONE) {
|
---|
| 791 | kdf_type = EVP_PKEY_DH_KDF_X9_42;
|
---|
| 792 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0)
|
---|
| 793 | goto err;
|
---|
| 794 | } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42)
|
---|
| 795 | /* Unknown KDF */
|
---|
| 796 | goto err;
|
---|
| 797 | if (kdf_md == NULL) {
|
---|
| 798 | /* Only SHA1 supported */
|
---|
| 799 | kdf_md = EVP_sha1();
|
---|
| 800 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0)
|
---|
| 801 | goto err;
|
---|
| 802 | } else if (EVP_MD_type(kdf_md) != NID_sha1)
|
---|
| 803 | /* Unsupported digest */
|
---|
| 804 | goto err;
|
---|
| 805 |
|
---|
| 806 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm))
|
---|
| 807 | goto err;
|
---|
| 808 |
|
---|
| 809 | /* Get wrap NID */
|
---|
| 810 | ctx = CMS_RecipientInfo_kari_get0_ctx(ri);
|
---|
| 811 | wrap_nid = EVP_CIPHER_CTX_type(ctx);
|
---|
| 812 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0)
|
---|
| 813 | goto err;
|
---|
| 814 | keylen = EVP_CIPHER_CTX_key_length(ctx);
|
---|
| 815 |
|
---|
| 816 | /* Package wrap algorithm in an AlgorithmIdentifier */
|
---|
| 817 |
|
---|
| 818 | wrap_alg = X509_ALGOR_new();
|
---|
| 819 | if (wrap_alg == NULL)
|
---|
| 820 | goto err;
|
---|
| 821 | wrap_alg->algorithm = OBJ_nid2obj(wrap_nid);
|
---|
| 822 | wrap_alg->parameter = ASN1_TYPE_new();
|
---|
| 823 | if (wrap_alg->parameter == NULL)
|
---|
| 824 | goto err;
|
---|
| 825 | if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0)
|
---|
| 826 | goto err;
|
---|
| 827 | if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) {
|
---|
| 828 | ASN1_TYPE_free(wrap_alg->parameter);
|
---|
| 829 | wrap_alg->parameter = NULL;
|
---|
| 830 | }
|
---|
| 831 |
|
---|
| 832 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0)
|
---|
| 833 | goto err;
|
---|
| 834 |
|
---|
| 835 | if (ukm) {
|
---|
| 836 | dukmlen = ASN1_STRING_length(ukm);
|
---|
| 837 | dukm = OPENSSL_memdup(ASN1_STRING_get0_data(ukm), dukmlen);
|
---|
| 838 | if (!dukm)
|
---|
| 839 | goto err;
|
---|
| 840 | }
|
---|
| 841 |
|
---|
| 842 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0)
|
---|
| 843 | goto err;
|
---|
| 844 | dukm = NULL;
|
---|
| 845 |
|
---|
| 846 | /*
|
---|
| 847 | * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter
|
---|
| 848 | * of another AlgorithmIdentifier.
|
---|
| 849 | */
|
---|
| 850 | penc = NULL;
|
---|
| 851 | penclen = i2d_X509_ALGOR(wrap_alg, &penc);
|
---|
| 852 | if (!penc || !penclen)
|
---|
| 853 | goto err;
|
---|
| 854 | wrap_str = ASN1_STRING_new();
|
---|
| 855 | if (wrap_str == NULL)
|
---|
| 856 | goto err;
|
---|
| 857 | ASN1_STRING_set0(wrap_str, penc, penclen);
|
---|
| 858 | penc = NULL;
|
---|
| 859 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH),
|
---|
| 860 | V_ASN1_SEQUENCE, wrap_str);
|
---|
| 861 |
|
---|
| 862 | rv = 1;
|
---|
| 863 |
|
---|
| 864 | err:
|
---|
| 865 | OPENSSL_free(penc);
|
---|
| 866 | X509_ALGOR_free(wrap_alg);
|
---|
| 867 | return rv;
|
---|
| 868 | }
|
---|
| 869 |
|
---|
| 870 | #endif
|
---|