1 /* $OpenBSD: pem_lib.c,v 1.49 2019/09/06 17:41:05 jsing Exp $ */ 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 <ctype.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 64 #include <openssl/opensslconf.h> 65 66 #include <openssl/buffer.h> 67 #include <openssl/err.h> 68 #include <openssl/evp.h> 69 #include <openssl/objects.h> 70 #include <openssl/pem.h> 71 #include <openssl/pkcs12.h> 72 #include <openssl/x509.h> 73 74 #ifndef OPENSSL_NO_DES 75 #include <openssl/des.h> 76 #endif 77 #ifndef OPENSSL_NO_ENGINE 78 #include <openssl/engine.h> 79 #endif 80 81 #include "asn1_locl.h" 82 83 #define MIN_LENGTH 4 84 85 static int load_iv(char **fromp, unsigned char *to, int num); 86 static int check_pem(const char *nm, const char *name); 87 int pem_check_suffix(const char *pem_str, const char *suffix); 88 89 /* XXX LSSL ABI XXX return value and `num' ought to be size_t */ 90 int 91 PEM_def_callback(char *buf, int num, int w, void *key) 92 { 93 size_t l; 94 int i; 95 const char *prompt; 96 97 if (num < 0) 98 return -1; 99 100 if (key) { 101 l = strlen(key); 102 if (l > (size_t)num) 103 l = (size_t)num; 104 memcpy(buf, key, l); 105 return (int)l; 106 } 107 108 prompt = EVP_get_pw_prompt(); 109 if (prompt == NULL) 110 prompt = "Enter PEM pass phrase:"; 111 112 for (;;) { 113 i = EVP_read_pw_string_min(buf, MIN_LENGTH, num, prompt, w); 114 if (i != 0) { 115 PEMerror(PEM_R_PROBLEMS_GETTING_PASSWORD); 116 memset(buf, 0, num); 117 return (-1); 118 } 119 l = strlen(buf); 120 if (l < MIN_LENGTH) { 121 fprintf(stderr, "phrase is too short, " 122 "needs to be at least %zu chars\n", 123 (size_t)MIN_LENGTH); 124 } else 125 break; 126 } 127 return (int)l; 128 } 129 130 void 131 PEM_proc_type(char *buf, int type) 132 { 133 const char *str; 134 135 if (type == PEM_TYPE_ENCRYPTED) 136 str = "ENCRYPTED"; 137 else if (type == PEM_TYPE_MIC_CLEAR) 138 str = "MIC-CLEAR"; 139 else if (type == PEM_TYPE_MIC_ONLY) 140 str = "MIC-ONLY"; 141 else 142 str = "BAD-TYPE"; 143 144 strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE); 145 strlcat(buf, str, PEM_BUFSIZE); 146 strlcat(buf, "\n", PEM_BUFSIZE); 147 } 148 149 void 150 PEM_dek_info(char *buf, const char *type, int len, char *str) 151 { 152 static const unsigned char map[17] = "0123456789ABCDEF"; 153 long i; 154 int j; 155 156 strlcat(buf, "DEK-Info: ", PEM_BUFSIZE); 157 strlcat(buf, type, PEM_BUFSIZE); 158 strlcat(buf, ",", PEM_BUFSIZE); 159 j = strlen(buf); 160 if (j + (len * 2) + 1 > PEM_BUFSIZE) 161 return; 162 for (i = 0; i < len; i++) { 163 buf[j + i * 2] = map[(str[i] >> 4) & 0x0f]; 164 buf[j + i * 2 + 1] = map[(str[i]) & 0x0f]; 165 } 166 buf[j + i * 2] = '\n'; 167 buf[j + i * 2 + 1] = '\0'; 168 } 169 170 void * 171 PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x, 172 pem_password_cb *cb, void *u) 173 { 174 BIO *b; 175 void *ret; 176 177 if ((b = BIO_new(BIO_s_file())) == NULL) { 178 PEMerror(ERR_R_BUF_LIB); 179 return (0); 180 } 181 BIO_set_fp(b, fp, BIO_NOCLOSE); 182 ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u); 183 BIO_free(b); 184 return (ret); 185 } 186 187 static int 188 check_pem(const char *nm, const char *name) 189 { 190 /* Normal matching nm and name */ 191 if (!strcmp(nm, name)) 192 return 1; 193 194 /* Make PEM_STRING_EVP_PKEY match any private key */ 195 196 if (!strcmp(name, PEM_STRING_EVP_PKEY)) { 197 int slen; 198 const EVP_PKEY_ASN1_METHOD *ameth; 199 if (!strcmp(nm, PEM_STRING_PKCS8)) 200 return 1; 201 if (!strcmp(nm, PEM_STRING_PKCS8INF)) 202 return 1; 203 slen = pem_check_suffix(nm, "PRIVATE KEY"); 204 if (slen > 0) { 205 /* NB: ENGINE implementations wont contain 206 * a deprecated old private key decode function 207 * so don't look for them. 208 */ 209 ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen); 210 if (ameth && ameth->old_priv_decode) 211 return 1; 212 } 213 return 0; 214 } 215 216 if (!strcmp(name, PEM_STRING_PARAMETERS)) { 217 int slen; 218 const EVP_PKEY_ASN1_METHOD *ameth; 219 slen = pem_check_suffix(nm, "PARAMETERS"); 220 if (slen > 0) { 221 ENGINE *e; 222 ameth = EVP_PKEY_asn1_find_str(&e, nm, slen); 223 if (ameth) { 224 int r; 225 if (ameth->param_decode) 226 r = 1; 227 else 228 r = 0; 229 #ifndef OPENSSL_NO_ENGINE 230 ENGINE_finish(e); 231 #endif 232 return r; 233 } 234 } 235 return 0; 236 } 237 238 /* Permit older strings */ 239 240 if (!strcmp(nm, PEM_STRING_X509_OLD) && 241 !strcmp(name, PEM_STRING_X509)) 242 return 1; 243 244 if (!strcmp(nm, PEM_STRING_X509_REQ_OLD) && 245 !strcmp(name, PEM_STRING_X509_REQ)) 246 return 1; 247 248 /* Allow normal certs to be read as trusted certs */ 249 if (!strcmp(nm, PEM_STRING_X509) && 250 !strcmp(name, PEM_STRING_X509_TRUSTED)) 251 return 1; 252 253 if (!strcmp(nm, PEM_STRING_X509_OLD) && 254 !strcmp(name, PEM_STRING_X509_TRUSTED)) 255 return 1; 256 257 /* Some CAs use PKCS#7 with CERTIFICATE headers */ 258 if (!strcmp(nm, PEM_STRING_X509) && 259 !strcmp(name, PEM_STRING_PKCS7)) 260 return 1; 261 262 if (!strcmp(nm, PEM_STRING_PKCS7_SIGNED) && 263 !strcmp(name, PEM_STRING_PKCS7)) 264 return 1; 265 266 #ifndef OPENSSL_NO_CMS 267 if (strcmp(nm, PEM_STRING_X509) == 0 && 268 strcmp(name, PEM_STRING_CMS) == 0) 269 return 1; 270 271 /* Allow CMS to be read from PKCS#7 headers */ 272 if (strcmp(nm, PEM_STRING_PKCS7) == 0 && 273 strcmp(name, PEM_STRING_CMS) == 0) 274 return 1; 275 #endif 276 277 return 0; 278 } 279 280 int 281 PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, 282 const char *name, BIO *bp, pem_password_cb *cb, void *u) 283 { 284 EVP_CIPHER_INFO cipher; 285 char *nm = NULL, *header = NULL; 286 unsigned char *data = NULL; 287 long len; 288 int ret = 0; 289 290 for (;;) { 291 if (!PEM_read_bio(bp, &nm, &header, &data, &len)) { 292 if (ERR_GET_REASON(ERR_peek_error()) == 293 PEM_R_NO_START_LINE) 294 ERR_asprintf_error_data("Expecting: %s", name); 295 return 0; 296 } 297 if (check_pem(nm, name)) 298 break; 299 free(nm); 300 free(header); 301 free(data); 302 } 303 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher)) 304 goto err; 305 if (!PEM_do_header(&cipher, data, &len, cb, u)) 306 goto err; 307 308 *pdata = data; 309 *plen = len; 310 311 if (pnm) 312 *pnm = nm; 313 314 ret = 1; 315 316 err: 317 if (!ret || !pnm) 318 free(nm); 319 free(header); 320 if (!ret) 321 free(data); 322 return ret; 323 } 324 325 int 326 PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp, void *x, 327 const EVP_CIPHER *enc, unsigned char *kstr, int klen, 328 pem_password_cb *callback, void *u) 329 { 330 BIO *b; 331 int ret; 332 333 if ((b = BIO_new(BIO_s_file())) == NULL) { 334 PEMerror(ERR_R_BUF_LIB); 335 return (0); 336 } 337 BIO_set_fp(b, fp, BIO_NOCLOSE); 338 ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u); 339 BIO_free(b); 340 return (ret); 341 } 342 343 int 344 PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp, void *x, 345 const EVP_CIPHER *enc, unsigned char *kstr, int klen, 346 pem_password_cb *callback, void *u) 347 { 348 EVP_CIPHER_CTX ctx; 349 int dsize = 0, i, j, ret = 0; 350 unsigned char *p, *data = NULL; 351 const char *objstr = NULL; 352 char buf[PEM_BUFSIZE]; 353 unsigned char key[EVP_MAX_KEY_LENGTH]; 354 unsigned char iv[EVP_MAX_IV_LENGTH]; 355 356 if (enc != NULL) { 357 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc)); 358 if (objstr == NULL) { 359 PEMerror(PEM_R_UNSUPPORTED_CIPHER); 360 goto err; 361 } 362 } 363 364 if ((dsize = i2d(x, NULL)) < 0) { 365 PEMerror(ERR_R_ASN1_LIB); 366 dsize = 0; 367 goto err; 368 } 369 /* dzise + 8 bytes are needed */ 370 /* actually it needs the cipher block size extra... */ 371 data = malloc(dsize + 20); 372 if (data == NULL) { 373 PEMerror(ERR_R_MALLOC_FAILURE); 374 goto err; 375 } 376 p = data; 377 i = i2d(x, &p); 378 379 if (enc != NULL) { 380 if (kstr == NULL) { 381 if (callback == NULL) 382 klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u); 383 else 384 klen = (*callback)(buf, PEM_BUFSIZE, 1, u); 385 if (klen <= 0) { 386 PEMerror(PEM_R_READ_KEY); 387 goto err; 388 } 389 kstr = (unsigned char *)buf; 390 } 391 if ((size_t)enc->iv_len > sizeof(iv)) { 392 PEMerror(EVP_R_IV_TOO_LARGE); 393 goto err; 394 } 395 arc4random_buf(iv, enc->iv_len); /* Generate a salt */ 396 /* The 'iv' is used as the iv and as a salt. It is 397 * NOT taken from the BytesToKey function */ 398 if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, 399 key, NULL)) 400 goto err; 401 402 if (kstr == (unsigned char *)buf) 403 explicit_bzero(buf, PEM_BUFSIZE); 404 405 if (strlen(objstr) + 23 + 2 * enc->iv_len + 13 > sizeof buf) { 406 PEMerror(ASN1_R_BUFFER_TOO_SMALL); 407 goto err; 408 } 409 410 buf[0] = '\0'; 411 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED); 412 PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv); 413 /* k=strlen(buf); */ 414 415 EVP_CIPHER_CTX_init(&ctx); 416 ret = 1; 417 if (!EVP_EncryptInit_ex(&ctx, enc, NULL, key, iv) || 418 !EVP_EncryptUpdate(&ctx, data, &j, data, i) || 419 !EVP_EncryptFinal_ex(&ctx, &(data[j]), &i)) 420 ret = 0; 421 EVP_CIPHER_CTX_cleanup(&ctx); 422 if (ret == 0) 423 goto err; 424 i += j; 425 } else { 426 ret = 1; 427 buf[0] = '\0'; 428 } 429 i = PEM_write_bio(bp, name, buf, data, i); 430 if (i <= 0) 431 ret = 0; 432 err: 433 explicit_bzero(key, sizeof(key)); 434 explicit_bzero(iv, sizeof(iv)); 435 explicit_bzero((char *)&ctx, sizeof(ctx)); 436 explicit_bzero(buf, PEM_BUFSIZE); 437 freezero(data, (unsigned int)dsize); 438 return (ret); 439 } 440 441 int 442 PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen, 443 pem_password_cb *callback, void *u) 444 { 445 int i, j, o, klen; 446 long len; 447 EVP_CIPHER_CTX ctx; 448 unsigned char key[EVP_MAX_KEY_LENGTH]; 449 char buf[PEM_BUFSIZE]; 450 451 len = *plen; 452 453 if (cipher->cipher == NULL) 454 return (1); 455 if (callback == NULL) 456 klen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u); 457 else 458 klen = callback(buf, PEM_BUFSIZE, 0, u); 459 if (klen <= 0) { 460 PEMerror(PEM_R_BAD_PASSWORD_READ); 461 return (0); 462 } 463 if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]), 464 (unsigned char *)buf, klen, 1, key, NULL)) 465 return 0; 466 467 j = (int)len; 468 EVP_CIPHER_CTX_init(&ctx); 469 o = EVP_DecryptInit_ex(&ctx, cipher->cipher, NULL, key, 470 &(cipher->iv[0])); 471 if (o) 472 o = EVP_DecryptUpdate(&ctx, data, &i, data, j); 473 if (o) 474 o = EVP_DecryptFinal_ex(&ctx, &(data[i]), &j); 475 EVP_CIPHER_CTX_cleanup(&ctx); 476 explicit_bzero((char *)buf, sizeof(buf)); 477 explicit_bzero((char *)key, sizeof(key)); 478 if (!o) { 479 PEMerror(PEM_R_BAD_DECRYPT); 480 return (0); 481 } 482 *plen = j + i; 483 return (1); 484 } 485 486 int 487 PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) 488 { 489 const EVP_CIPHER *enc = NULL; 490 char *p, c; 491 char **header_pp = &header; 492 493 cipher->cipher = NULL; 494 if ((header == NULL) || (*header == '\0') || (*header == '\n')) 495 return (1); 496 if (strncmp(header, "Proc-Type: ", 11) != 0) { 497 PEMerror(PEM_R_NOT_PROC_TYPE); 498 return (0); 499 } 500 header += 11; 501 if (*header != '4') 502 return (0); 503 header++; 504 if (*header != ',') 505 return (0); 506 header++; 507 if (strncmp(header, "ENCRYPTED", 9) != 0) { 508 PEMerror(PEM_R_NOT_ENCRYPTED); 509 return (0); 510 } 511 for (; (*header != '\n') && (*header != '\0'); header++) 512 ; 513 if (*header == '\0') { 514 PEMerror(PEM_R_SHORT_HEADER); 515 return (0); 516 } 517 header++; 518 if (strncmp(header, "DEK-Info: ", 10) != 0) { 519 PEMerror(PEM_R_NOT_DEK_INFO); 520 return (0); 521 } 522 header += 10; 523 524 p = header; 525 for (;;) { 526 c= *header; 527 if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') || 528 ((c >= '0') && (c <= '9')))) 529 break; 530 header++; 531 } 532 *header = '\0'; 533 cipher->cipher = enc = EVP_get_cipherbyname(p); 534 *header = c; 535 header++; 536 537 if (enc == NULL) { 538 PEMerror(PEM_R_UNSUPPORTED_ENCRYPTION); 539 return (0); 540 } 541 if (!load_iv(header_pp, &(cipher->iv[0]), enc->iv_len)) 542 return (0); 543 544 return (1); 545 } 546 547 static int 548 load_iv(char **fromp, unsigned char *to, int num) 549 { 550 int v, i; 551 char *from; 552 553 from= *fromp; 554 for (i = 0; i < num; i++) 555 to[i] = 0; 556 num *= 2; 557 for (i = 0; i < num; i++) { 558 if ((*from >= '0') && (*from <= '9')) 559 v = *from - '0'; 560 else if ((*from >= 'A') && (*from <= 'F')) 561 v = *from - 'A' + 10; 562 else if ((*from >= 'a') && (*from <= 'f')) 563 v = *from - 'a' + 10; 564 else { 565 PEMerror(PEM_R_BAD_IV_CHARS); 566 return (0); 567 } 568 from++; 569 to[i / 2] |= v << (long)((!(i & 1)) * 4); 570 } 571 572 *fromp = from; 573 return (1); 574 } 575 576 int 577 PEM_write(FILE *fp, const char *name, const char *header, 578 const unsigned char *data, long len) 579 { 580 BIO *b; 581 int ret; 582 583 if ((b = BIO_new(BIO_s_file())) == NULL) { 584 PEMerror(ERR_R_BUF_LIB); 585 return (0); 586 } 587 BIO_set_fp(b, fp, BIO_NOCLOSE); 588 ret = PEM_write_bio(b, name, header, data, len); 589 BIO_free(b); 590 return (ret); 591 } 592 593 int 594 PEM_write_bio(BIO *bp, const char *name, const char *header, 595 const unsigned char *data, long len) 596 { 597 int nlen, n, i, j, outl; 598 unsigned char *buf = NULL; 599 EVP_ENCODE_CTX ctx; 600 int reason = ERR_R_BUF_LIB; 601 602 EVP_EncodeInit(&ctx); 603 nlen = strlen(name); 604 605 if ((BIO_write(bp, "-----BEGIN ", 11) != 11) || 606 (BIO_write(bp, name, nlen) != nlen) || 607 (BIO_write(bp, "-----\n", 6) != 6)) 608 goto err; 609 610 i = strlen(header); 611 if (i > 0) { 612 if ((BIO_write(bp, header, i) != i) || 613 (BIO_write(bp, "\n", 1) != 1)) 614 goto err; 615 } 616 617 buf = reallocarray(NULL, PEM_BUFSIZE, 8); 618 if (buf == NULL) { 619 reason = ERR_R_MALLOC_FAILURE; 620 goto err; 621 } 622 623 i = j = 0; 624 while (len > 0) { 625 n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len); 626 if (!EVP_EncodeUpdate(&ctx, buf, &outl, &(data[j]), n)) 627 goto err; 628 if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl)) 629 goto err; 630 i += outl; 631 len -= n; 632 j += n; 633 } 634 EVP_EncodeFinal(&ctx, buf, &outl); 635 if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl)) 636 goto err; 637 freezero(buf, PEM_BUFSIZE * 8); 638 buf = NULL; 639 if ((BIO_write(bp, "-----END ", 9) != 9) || 640 (BIO_write(bp, name, nlen) != nlen) || 641 (BIO_write(bp, "-----\n", 6) != 6)) 642 goto err; 643 return (i + outl); 644 645 err: 646 freezero(buf, PEM_BUFSIZE * 8); 647 PEMerror(reason); 648 return (0); 649 } 650 651 int 652 PEM_read(FILE *fp, char **name, char **header, unsigned char **data, long *len) 653 { 654 BIO *b; 655 int ret; 656 657 if ((b = BIO_new(BIO_s_file())) == NULL) { 658 PEMerror(ERR_R_BUF_LIB); 659 return (0); 660 } 661 BIO_set_fp(b, fp, BIO_NOCLOSE); 662 ret = PEM_read_bio(b, name, header, data, len); 663 BIO_free(b); 664 return (ret); 665 } 666 667 int 668 PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, 669 long *len) 670 { 671 EVP_ENCODE_CTX ctx; 672 int end = 0, i, k, bl = 0, hl = 0, nohead = 0; 673 char buf[256]; 674 BUF_MEM *nameB; 675 BUF_MEM *headerB; 676 BUF_MEM *dataB, *tmpB; 677 678 nameB = BUF_MEM_new(); 679 headerB = BUF_MEM_new(); 680 dataB = BUF_MEM_new(); 681 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) { 682 BUF_MEM_free(nameB); 683 BUF_MEM_free(headerB); 684 BUF_MEM_free(dataB); 685 PEMerror(ERR_R_MALLOC_FAILURE); 686 return (0); 687 } 688 689 buf[254] = '\0'; 690 for (;;) { 691 i = BIO_gets(bp, buf, 254); 692 693 if (i <= 0) { 694 PEMerror(PEM_R_NO_START_LINE); 695 goto err; 696 } 697 698 while ((i >= 0) && (buf[i] <= ' ')) 699 i--; 700 buf[++i] = '\n'; 701 buf[++i] = '\0'; 702 703 if (strncmp(buf, "-----BEGIN ", 11) == 0) { 704 i = strlen(&(buf[11])); 705 706 if (strncmp(&(buf[11 + i - 6]), "-----\n", 6) != 0) 707 continue; 708 if (!BUF_MEM_grow(nameB, i + 9)) { 709 PEMerror(ERR_R_MALLOC_FAILURE); 710 goto err; 711 } 712 memcpy(nameB->data, &(buf[11]), i - 6); 713 nameB->data[i - 6] = '\0'; 714 break; 715 } 716 } 717 hl = 0; 718 if (!BUF_MEM_grow(headerB, 256)) { 719 PEMerror(ERR_R_MALLOC_FAILURE); 720 goto err; 721 } 722 headerB->data[0] = '\0'; 723 for (;;) { 724 i = BIO_gets(bp, buf, 254); 725 if (i <= 0) 726 break; 727 728 while ((i >= 0) && (buf[i] <= ' ')) 729 i--; 730 buf[++i] = '\n'; 731 buf[++i] = '\0'; 732 733 if (buf[0] == '\n') 734 break; 735 if (!BUF_MEM_grow(headerB, hl + i + 9)) { 736 PEMerror(ERR_R_MALLOC_FAILURE); 737 goto err; 738 } 739 if (strncmp(buf, "-----END ", 9) == 0) { 740 nohead = 1; 741 break; 742 } 743 memcpy(&(headerB->data[hl]), buf, i); 744 headerB->data[hl + i] = '\0'; 745 hl += i; 746 } 747 748 bl = 0; 749 if (!BUF_MEM_grow(dataB, 1024)) { 750 PEMerror(ERR_R_MALLOC_FAILURE); 751 goto err; 752 } 753 dataB->data[0] = '\0'; 754 if (!nohead) { 755 for (;;) { 756 i = BIO_gets(bp, buf, 254); 757 if (i <= 0) 758 break; 759 760 while ((i >= 0) && (buf[i] <= ' ')) 761 i--; 762 buf[++i] = '\n'; 763 buf[++i] = '\0'; 764 765 if (i != 65) 766 end = 1; 767 if (strncmp(buf, "-----END ", 9) == 0) 768 break; 769 if (i > 65) 770 break; 771 if (!BUF_MEM_grow_clean(dataB, i + bl + 9)) { 772 PEMerror(ERR_R_MALLOC_FAILURE); 773 goto err; 774 } 775 memcpy(&(dataB->data[bl]), buf, i); 776 dataB->data[bl + i] = '\0'; 777 bl += i; 778 if (end) { 779 buf[0] = '\0'; 780 i = BIO_gets(bp, buf, 254); 781 if (i <= 0) 782 break; 783 784 while ((i >= 0) && (buf[i] <= ' ')) 785 i--; 786 buf[++i] = '\n'; 787 buf[++i] = '\0'; 788 789 break; 790 } 791 } 792 } else { 793 tmpB = headerB; 794 headerB = dataB; 795 dataB = tmpB; 796 bl = hl; 797 } 798 i = strlen(nameB->data); 799 if ((strncmp(buf, "-----END ", 9) != 0) || 800 (strncmp(nameB->data, &(buf[9]), i) != 0) || 801 (strncmp(&(buf[9 + i]), "-----\n", 6) != 0)) { 802 PEMerror(PEM_R_BAD_END_LINE); 803 goto err; 804 } 805 806 EVP_DecodeInit(&ctx); 807 i = EVP_DecodeUpdate(&ctx, 808 (unsigned char *)dataB->data, &bl, 809 (unsigned char *)dataB->data, bl); 810 if (i < 0) { 811 PEMerror(PEM_R_BAD_BASE64_DECODE); 812 goto err; 813 } 814 i = EVP_DecodeFinal(&ctx, (unsigned char *)&(dataB->data[bl]), &k); 815 if (i < 0) { 816 PEMerror(PEM_R_BAD_BASE64_DECODE); 817 goto err; 818 } 819 bl += k; 820 821 if (bl == 0) 822 goto err; 823 *name = nameB->data; 824 *header = headerB->data; 825 *data = (unsigned char *)dataB->data; 826 *len = bl; 827 free(nameB); 828 free(headerB); 829 free(dataB); 830 return (1); 831 832 err: 833 BUF_MEM_free(nameB); 834 BUF_MEM_free(headerB); 835 BUF_MEM_free(dataB); 836 return (0); 837 } 838 839 /* Check pem string and return prefix length. 840 * If for example the pem_str == "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" 841 * the return value is 3 for the string "RSA". 842 */ 843 844 int 845 pem_check_suffix(const char *pem_str, const char *suffix) 846 { 847 int pem_len = strlen(pem_str); 848 int suffix_len = strlen(suffix); 849 const char *p; 850 851 if (suffix_len + 1 >= pem_len) 852 return 0; 853 p = pem_str + pem_len - suffix_len; 854 if (strcmp(p, suffix)) 855 return 0; 856 p--; 857 if (*p != ' ') 858 return 0; 859 return p - pem_str; 860 } 861