1/* 2 * ==================================================================== 3 * Copyright (c) 1999 The OpenSSL Project. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the 15 * distribution. 16 * 17 * 3. All advertising materials mentioning features or use of this 18 * software must display the following acknowledgment: 19 * "This product includes software developed by the OpenSSL Project 20 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 21 * 22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 23 * endorse or promote products derived from this software without 24 * prior written permission. For written permission, please contact 25 * licensing@OpenSSL.org. 26 * 27 * 5. Products derived from this software may not be called "OpenSSL" 28 * nor may "OpenSSL" appear in their names without prior written 29 * permission of the OpenSSL Project. 30 * 31 * 6. Redistributions of any form whatsoever must retain the following 32 * acknowledgment: 33 * "This product includes software developed by the OpenSSL Project 34 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 35 * 36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 47 * OF THE POSSIBILITY OF SUCH DAMAGE. 48 * ==================================================================== 49 * 50 * This product includes cryptographic software written by Eric Young 51 * (eay@cryptsoft.com). This product includes software written by Tim 52 * Hudson (tjh@cryptsoft.com). 53 * 54 */ 55 56/* 57 * Copyright 2002, 2003 Sun Microsystems, Inc. All rights reserved. 58 * Use is subject to license terms. 59 * 60 * All of the functions included here are internal to the pkcs12 functions 61 * in this library. None of these are exposed. 62 */ 63 64#pragma ident "%Z%%M% %I% %E% SMI" 65 66#include <stdio.h> 67#include <string.h> 68 69#include <openssl/crypto.h> 70#include <openssl/err.h> 71#include <openssl/x509.h> 72 73#include <openssl/pkcs12.h> 74#include <p12aux.h> 75#include <auxutil.h> 76#include <p12err.h> 77 78/* 79 * asc2bmpstring - Convert a regular C ASCII string to an ASn1_STRING in 80 * ASN1_BMPSTRING format. 81 * 82 * Arguments: 83 * str - String to be convered. 84 * len - Length of the string. 85 * 86 * Returns: 87 * == NULL - An error occurred. Error information (accessible by 88 * ERR_get_error()) is set. 89 * != NULL - Points to an ASN1_BMPSTRING structure with the converted 90 * string as a value. 91 */ 92ASN1_BMPSTRING * 93asc2bmpstring(const char *str, int len) 94{ 95 ASN1_BMPSTRING *bmp = NULL; 96 uchar_t *uni = NULL; 97 int unilen; 98 99 /* Convert the character to the bmp format. */ 100 if (asc2uni(str, len, &uni, &unilen) == 0) { 101 SUNWerr(SUNW_F_ASC2BMPSTRING, SUNW_R_MEMORY_FAILURE); 102 return (NULL); 103 } 104 105 /* 106 * Adjust for possible pair of NULL bytes at the end because 107 * asc2uni() returns a doubly null terminated string. 108 */ 109 if (uni[unilen - 1] == '\0' && uni[unilen - 2] == '\0') 110 unilen -= 2; 111 112 /* Construct comparison string with correct format */ 113 bmp = M_ASN1_BMPSTRING_new(); 114 if (bmp == NULL) { 115 SUNWerr(SUNW_F_ASC2BMPSTRING, SUNW_R_MEMORY_FAILURE); 116 OPENSSL_free(uni); 117 return (NULL); 118 } 119 120 bmp->data = uni; 121 bmp->length = unilen; 122 123 return (bmp); 124} 125 126/* 127 * utf82ascstr - Convert a UTF8STRING string to a regular C ASCII string. 128 * This goes through an intermediate step with a ASN1_STRING type of 129 * IA5STRING (International Alphabet 5, which is the same as ASCII). 130 * 131 * Arguments: 132 * str - UTF8STRING to be converted. 133 * 134 * Returns: 135 * == NULL - An error occurred. Error information (accessible by 136 * ERR_get_error()) is set. 137 * != NULL - Points to a NULL-termianted ASCII string. The caller must 138 * free it. 139 */ 140uchar_t * 141utf82ascstr(ASN1_UTF8STRING *ustr) 142{ 143 ASN1_STRING tmpstr; 144 ASN1_STRING *astr = &tmpstr; 145 uchar_t *retstr = NULL; 146 int mbflag; 147 int ret; 148 149 if (ustr == NULL || ustr->type != V_ASN1_UTF8STRING) { 150 SUNWerr(SUNW_F_UTF82ASCSTR, SUNW_R_INVALID_ARG); 151 return (NULL); 152 } 153 154 mbflag = MBSTRING_ASC; 155 tmpstr.data = NULL; 156 tmpstr.length = 0; 157 158 ret = ASN1_mbstring_copy(&astr, ustr->data, ustr->length, mbflag, 159 B_ASN1_IA5STRING); 160 if (ret < 0) { 161 SUNWerr(SUNW_F_UTF82ASCSTR, SUNW_R_STR_CONVERT_ERR); 162 return (NULL); 163 } 164 165 retstr = OPENSSL_malloc(astr->length + 1); 166 if (retstr == NULL) { 167 SUNWerr(SUNW_F_UTF82ASCSTR, SUNW_R_MEMORY_FAILURE); 168 return (NULL); 169 } 170 171 (void) memcpy(retstr, astr->data, astr->length); 172 retstr[astr->length] = '\0'; 173 OPENSSL_free(astr->data); 174 175 return (retstr); 176} 177 178/* 179 * set_results - Given two pointers to stacks of private keys, certs or CA 180 * CA certs, either copy the second stack to the first, or append the 181 * contents of the second to the first. 182 * 183 * Arguments: 184 * pkeys - Points to stack of pkeys 185 * work_kl - Points to working stack of pkeys 186 * certs - Points to stack of certs 187 * work_cl - Points to working stack of certs 188 * cacerts - Points to stack of CA certs 189 * work_ca - Points to working stack of CA certs 190 * xtrakeys - Points to stack of unmatcned pkeys 191 * work_xl - Points to working stack of unmatcned pkeys 192 * 193 * The arguments are in pairs. The first of each pair points to a stack 194 * of keys or certs. The second of the pair points at a 'working stack' 195 * of the same type of entities. Actions taken are as follows: 196 * 197 * - If either the first or second argument is NULL, or if there are no 198 * members in the second stack, there is nothing to do. 199 * - If the first argument points to a pointer which is NULL, then there 200 * is no existing stack for the first argument. Copy the stack pointer 201 * from the second argument to the first argument and NULL out the stack 202 * pointer for the second. 203 * - Otherwise, go through the elements of the second stack, removing each 204 * and adding it to the first stack. 205 * 206 * Returns: 207 * == -1 - An error occurred. Call ERR_get_error() to get error information. 208 * == 0 - No matching returns were found. 209 * > 0 - This is the arithmetic 'or' of the FOUND_* bits that indicate which 210 * of the requested entries were manipulated. 211 */ 212int 213set_results(STACK_OF(EVP_PKEY) **pkeys, STACK_OF(EVP_PKEY) **work_kl, 214 STACK_OF(X509) **certs, STACK_OF(X509) **work_cl, 215 STACK_OF(X509) **cacerts, STACK_OF(X509) **work_ca, 216 STACK_OF(EVP_PKEY) **xtrakeys, STACK_OF(EVP_PKEY) **work_xl) 217{ 218 int retval = 0; 219 220 if (pkeys != NULL && work_kl != NULL && *work_kl != NULL && 221 sk_EVP_PKEY_num(*work_kl) > 0) { 222 if (*pkeys == NULL) { 223 *pkeys = *work_kl; 224 *work_kl = NULL; 225 } else { 226 if (sunw_append_keys(*pkeys, *work_kl) < 0) { 227 return (-1); 228 } 229 } 230 retval |= FOUND_PKEY; 231 } 232 if (certs != NULL && work_cl != NULL && *work_cl != NULL && 233 sk_X509_num(*work_cl) > 0) { 234 if (*certs == NULL) { 235 *certs = *work_cl; 236 *work_cl = NULL; 237 } else { 238 if (move_certs(*certs, *work_cl) < 0) { 239 return (-1); 240 } 241 } 242 retval |= FOUND_CERT; 243 } 244 245 if (cacerts != NULL && work_ca != NULL && *work_ca != NULL && 246 sk_X509_num(*work_ca) > 0) { 247 if (*cacerts == NULL) { 248 *cacerts = *work_ca; 249 *work_ca = NULL; 250 } else { 251 if (move_certs(*cacerts, *work_ca) < 0) { 252 return (-1); 253 } 254 } 255 retval |= FOUND_CA_CERTS; 256 } 257 258 if (xtrakeys != NULL && work_xl != NULL && *work_xl != NULL && 259 sk_EVP_PKEY_num(*work_xl) > 0) { 260 if (*xtrakeys == NULL) { 261 *xtrakeys = *work_xl; 262 *work_xl = NULL; 263 } else { 264 if (sunw_append_keys(*xtrakeys, *work_xl) < 0) { 265 return (-1); 266 } 267 } 268 retval |= FOUND_XPKEY; 269 } 270 271 return (retval); 272} 273 274/* 275 * find_attr - Look for a given attribute of the type associated with the NID. 276 * 277 * Arguments: 278 * nid - NID for the attribute to be found (either NID_friendlyName or 279 * NID_locakKeyId) 280 * str - ASN1_STRING-type structure containing the value to be found, 281 * FriendlyName expects a ASN1_BMPSTRING and localKeyID uses a 282 * ASN1_STRING. 283 * kl - Points to a stack of private keys. 284 * pkey - Points at a location where the address of the matching private 285 * key will be stored. 286 * cl - Points to a stack of client certs with matching private keys. 287 * cert - Points to locaiton where the address of the matching client cert 288 * will be returned 289 * 290 * This function is designed to process lists of certs and private keys. 291 * This is made complex because these the attributes are stored differently 292 * for certs and for keys. For certs, only a few attributes are retained. 293 * FriendlyName is stored in the aux structure, under the name 'alias'. 294 * LocalKeyId is also stored in the aux structure, under the name 'keyid'. 295 * A pkey structure has a stack of attributes. 296 * 297 * The basic approach is: 298 * - If there there is no stack of certs but a stack of private keys exists, 299 * search the stack of keys for a match. Alternately, if there is a stack 300 * of certs and no private keys, search the certs. 301 * 302 * - If there are both certs and keys, assume that the matching certs and 303 * keys are in their respective stacks, with matching entries in the same 304 * order. Search for the name or keyid in the stack of certs. If it is 305 * not found, then this function returns 0 (nothing found). 306 * 307 * - Once a cert is found, verify that the key actually matches by 308 * comparing the private key with the public key (in the cert). 309 * If they don't match, return an error. 310 * 311 * A pointer to cert and/or pkey which matches the name or keyid is stored 312 * in the return arguments. 313 * 314 * Returns: 315 * 0 - No matches were found. 316 * > 0 - Bits set based on FOUND_* definitions, indicating what was found. 317 * This can be FOUND_PKEY, FOUND_CERT or (FOUND_PKEY | FOUND_CERT). 318 */ 319int 320find_attr(int nid, ASN1_STRING *str, STACK_OF(EVP_PKEY) *kl, EVP_PKEY **pkey, 321 STACK_OF(X509) *cl, X509 **cert) 322{ 323 ASN1_UTF8STRING *ustr = NULL; 324 ASN1_STRING *s; 325 ASN1_TYPE *t; 326 EVP_PKEY *p; 327 uchar_t *fname = NULL; 328 X509 *x; 329 int found = 0; 330 int chkcerts; 331 int len; 332 int res; 333 int c = -1; 334 int k = -1; 335 336 chkcerts = (cert != NULL || pkey != NULL) && cl != NULL; 337 if (chkcerts && nid == NID_friendlyName && 338 str->type == V_ASN1_BMPSTRING) { 339 ustr = ASN1_UTF8STRING_new(); 340 if (ustr == NULL) { 341 SUNWerr(SUNW_F_FINDATTR, SUNW_R_MEMORY_FAILURE); 342 return (0); 343 } 344 len = ASN1_STRING_to_UTF8(&fname, str); 345 if (fname == NULL) { 346 ASN1_UTF8STRING_free(ustr); 347 SUNWerr(SUNW_F_FINDATTR, SUNW_R_STR_CONVERT_ERR); 348 return (0); 349 } 350 351 if (ASN1_STRING_set(ustr, fname, len) == 0) { 352 ASN1_UTF8STRING_free(ustr); 353 OPENSSL_free(fname); 354 SUNWerr(SUNW_F_FINDATTR, SUNW_R_MEMORY_FAILURE); 355 return (0); 356 } 357 } 358 359 if (chkcerts) { 360 for (c = 0; c < sk_X509_num(cl); c++) { 361 res = -1; 362 x = sk_X509_value(cl, c); 363 if (nid == NID_friendlyName && ustr != NULL) { 364 if (x->aux == NULL || x->aux->alias == NULL) 365 continue; 366 s = x->aux->alias; 367 if (s != NULL && s->type == ustr->type && 368 s->data != NULL) { 369 res = ASN1_STRING_cmp(s, ustr); 370 } 371 } else { 372 if (x->aux == NULL || x->aux->keyid == NULL) 373 continue; 374 s = x->aux->keyid; 375 if (s != NULL && s->type == str->type && 376 s->data != NULL) { 377 res = ASN1_STRING_cmp(s, str); 378 } 379 } 380 if (res == 0) { 381 if (cert != NULL) 382 *cert = sk_X509_delete(cl, c); 383 found = FOUND_CERT; 384 break; 385 } 386 } 387 if (ustr != NULL) { 388 ASN1_UTF8STRING_free(ustr); 389 OPENSSL_free(fname); 390 } 391 } 392 393 if (pkey != NULL && kl != NULL) { 394 /* 395 * Looking for pkey to match a cert? If so, assume that 396 * lists of certs and their matching pkeys are in the same 397 * order. Call X509_check_private_key() to verify this 398 * assumption. 399 */ 400 if (found != 0 && cert != NULL) { 401 k = c; 402 p = sk_EVP_PKEY_value(kl, k); 403 if (X509_check_private_key(x, p) != 0) { 404 if (pkey != NULL) 405 *pkey = sk_EVP_PKEY_delete(kl, k); 406 found |= FOUND_PKEY; 407 } 408 } else if (cert == NULL) { 409 for (k = 0; k < sk_EVP_PKEY_num(kl); k++) { 410 p = sk_EVP_PKEY_value(kl, k); 411 if (p == NULL || p->attributes == NULL) 412 continue; 413 414 t = PKCS12_get_attr_gen(p->attributes, nid); 415 if (t != NULL || ASN1_STRING_cmp(str, 416 t->value.asn1_string) == 0) 417 continue; 418 419 found |= FOUND_PKEY; 420 if (pkey != NULL) 421 *pkey = sk_EVP_PKEY_delete(kl, k); 422 break; 423 } 424 } 425 } 426 427 return (found); 428} 429 430/* 431 * find_attr_by_nid - Given a ASN1_TYPE, return the offset of a X509_ATTRIBUTE 432 * of the type specified by the given NID. 433 * 434 * Arguments: 435 * attrs - Stack of attributes to search 436 * nid - NID of the attribute being searched for 437 * 438 * Returns: 439 * -1 None found 440 * != -1 Offset of the matching attribute. 441 */ 442int 443find_attr_by_nid(STACK_OF(X509_ATTRIBUTE) *attrs, int nid) 444{ 445 X509_ATTRIBUTE *a; 446 int i; 447 448 if (attrs == NULL) 449 return (-1); 450 451 for (i = 0; i < sk_X509_ATTRIBUTE_num(attrs); i++) { 452 a = sk_X509_ATTRIBUTE_value(attrs, i); 453 if (OBJ_obj2nid(a->object) == nid) 454 return (i); 455 } 456 return (-1); 457} 458 459/* 460 * get_key_cert - Get a cert and its matching key from the stacks of certs 461 * and keys. They are removed from the stacks. 462 * 463 * Arguments: 464 * n - Offset of the entries to return. 465 * kl - Points to a stack of private keys that matches the list of 466 * certs below. 467 * pkey - Points at location where the address of the matching private 468 * key will be stored. 469 * cl - Points to a stack of client certs with matching private keys. 470 * cert - Points to locaiton where the address of the matching client cert 471 * will be returned 472 * 473 * The assumption is that the stacks of keys and certs contain key/cert pairs, 474 * with entries in the same order and hence at the same offset. Provided 475 * the key and cert selected match, each will be removed from its stack and 476 * returned. 477 * 478 * A stack of certs can be passed in without a stack of private keys, and vise 479 * versa. In that case, the indicated key/cert will be returned. 480 * 481 * Returns: 482 * 0 - No matches were found. 483 * > 0 - Bits set based on FOUND_* definitions, indicating what is returned. 484 * This can be FOUND_PKEY, FOUND_CERT or (FOUND_PKEY | FOUND_CERT). 485 */ 486int 487get_key_cert(int n, STACK_OF(EVP_PKEY) *kl, EVP_PKEY **pkey, STACK_OF(X509) *cl, 488 X509 **cert) 489{ 490 int retval = 0; 491 int nk; 492 int nc; 493 494 nk = (kl != NULL) ? sk_EVP_PKEY_num(kl) : 0; 495 nc = (cl != NULL) ? sk_X509_num(cl) : 0; 496 497 if (pkey != NULL && *pkey == NULL) { 498 if (nk > 0 && n >= 0 || n < nk) { 499 *pkey = sk_EVP_PKEY_delete(kl, n); 500 if (*pkey != NULL) 501 retval |= FOUND_PKEY; 502 } 503 } 504 505 if (cert != NULL && *cert == NULL) { 506 if (nc > 0 && n >= 0 && n < nc) { 507 *cert = sk_X509_delete(cl, n); 508 if (*cert != NULL) 509 retval |= FOUND_CERT; 510 } 511 } 512 513 return (retval); 514} 515 516/* 517 * type2attrib - Given a ASN1_TYPE, return a X509_ATTRIBUTE of the type 518 * specified by the given NID. 519 * 520 * Arguments: 521 * ty - Type structure to be made into an attribute 522 * nid - NID of the attribute 523 * 524 * Returns: 525 * NULL An error occurred. 526 * != NULL An X509_ATTRIBUTE structure. 527 */ 528X509_ATTRIBUTE * 529type2attrib(ASN1_TYPE *ty, int nid) 530{ 531 X509_ATTRIBUTE *a; 532 533 if ((a = X509_ATTRIBUTE_new()) == NULL || 534 (a->value.set = sk_ASN1_TYPE_new_null()) == NULL || 535 sk_ASN1_TYPE_push(a->value.set, ty) == 0) { 536 if (a != NULL) 537 X509_ATTRIBUTE_free(a); 538 SUNWerr(SUNW_F_TYPE2ATTRIB, SUNW_R_MEMORY_FAILURE); 539 return (NULL); 540 } 541 a->single = 0; 542 a->object = OBJ_nid2obj(nid); 543 544 return (a); 545} 546 547/* 548 * attrib2type - Given a X509_ATTRIBUTE, return pointer to the ASN1_TYPE 549 * component 550 * 551 * Arguments: 552 * attr - Attribute structure containing a type. 553 * 554 * Returns: 555 * NULL An error occurred. 556 * != NULL An ASN1_TYPE structure. 557 */ 558ASN1_TYPE * 559attrib2type(X509_ATTRIBUTE *attr) 560{ 561 ASN1_TYPE *ty = NULL; 562 563 if (attr == NULL || attr->single == 1) 564 return (NULL); 565 566 if (sk_ASN1_TYPE_num(attr->value.set) > 0) 567 ty = sk_ASN1_TYPE_value(attr->value.set, 0); 568 569 return (ty); 570} 571 572/* 573 * move_certs - Given two stacks of certs, remove the certs from 574 * the second stack and append them to the first. 575 * 576 * Arguments: 577 * dst - the stack to receive the certs from 'src' 578 * src - the stack whose certs are to be moved. 579 * 580 * Returns: 581 * -1 - An error occurred. The error status is set. 582 * >= 0 - The number of certs that were copied. 583 */ 584int 585move_certs(STACK_OF(X509) *dst, STACK_OF(X509) *src) 586{ 587 X509 *tmpc; 588 int count = 0; 589 590 while (sk_X509_num(src) > 0) { 591 tmpc = sk_X509_delete(src, 0); 592 if (sk_X509_push(dst, tmpc) == 0) { 593 X509_free(tmpc); 594 SUNWerr(SUNW_F_MOVE_CERTS, SUNW_R_MEMORY_FAILURE); 595 return (-1); 596 } 597 count++; 598 } 599 600 return (count); 601} 602 603/* 604 * print_time - Given an ASN1_TIME, print one or both of the times. 605 * 606 * Arguments: 607 * fp - File to write to 608 * t - The time to format and print. 609 * 610 * Returns: 611 * 0 - Error occurred while opening or writing. 612 * > 0 - Success. 613 */ 614int 615print_time(FILE *fp, ASN1_TIME *t) 616{ 617 BIO *bp; 618 int ret = 1; 619 620 if ((bp = BIO_new(BIO_s_file())) == NULL) { 621 return (0); 622 } 623 624 (void) BIO_set_fp(bp, fp, BIO_NOCLOSE); 625 ret = ASN1_TIME_print(bp, t); 626 (void) BIO_free(bp); 627 628 return (ret); 629} 630