1/* crypto/pem/pem_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 <ctype.h> 61#include "cryptlib.h" 62#include <openssl/buffer.h> 63#include <openssl/objects.h> 64#include <openssl/evp.h> 65#include <openssl/rand.h> 66#include <openssl/x509.h> 67#include <openssl/pem.h> 68#include <openssl/pkcs12.h> 69#include "asn1_locl.h" 70#ifndef OPENSSL_NO_DES 71# include <openssl/des.h> 72#endif 73#ifndef OPENSSL_NO_ENGINE 74# include <openssl/engine.h> 75#endif 76 77const char PEM_version[] = "PEM" OPENSSL_VERSION_PTEXT; 78 79#define MIN_LENGTH 4 80 81static int load_iv(char **fromp, unsigned char *to, int num); 82static int check_pem(const char *nm, const char *name); 83int pem_check_suffix(const char *pem_str, const char *suffix); 84 85int PEM_def_callback(char *buf, int num, int w, void *key) 86{ 87#ifdef OPENSSL_NO_FP_API 88 /* 89 * We should not ever call the default callback routine from windows. 90 */ 91 PEMerr(PEM_F_PEM_DEF_CALLBACK, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 92 return (-1); 93#else 94 int i, j; 95 const char *prompt; 96 if (key) { 97 i = strlen(key); 98 i = (i > num) ? num : i; 99 memcpy(buf, key, i); 100 return (i); 101 } 102 103 prompt = EVP_get_pw_prompt(); 104 if (prompt == NULL) 105 prompt = "Enter PEM pass phrase:"; 106 107 for (;;) { 108 i = EVP_read_pw_string_min(buf, MIN_LENGTH, num, prompt, w); 109 if (i != 0) { 110 PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD); 111 memset(buf, 0, (unsigned int)num); 112 return (-1); 113 } 114 j = strlen(buf); 115 if (j < MIN_LENGTH) { 116 fprintf(stderr, 117 "phrase is too short, needs to be at least %d chars\n", 118 MIN_LENGTH); 119 } else 120 break; 121 } 122 return (j); 123#endif 124} 125 126void PEM_proc_type(char *buf, int type) 127{ 128 const char *str; 129 130 if (type == PEM_TYPE_ENCRYPTED) 131 str = "ENCRYPTED"; 132 else if (type == PEM_TYPE_MIC_CLEAR) 133 str = "MIC-CLEAR"; 134 else if (type == PEM_TYPE_MIC_ONLY) 135 str = "MIC-ONLY"; 136 else 137 str = "BAD-TYPE"; 138 139 BUF_strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE); 140 BUF_strlcat(buf, str, PEM_BUFSIZE); 141 BUF_strlcat(buf, "\n", PEM_BUFSIZE); 142} 143 144void PEM_dek_info(char *buf, const char *type, int len, char *str) 145{ 146 static const unsigned char map[17] = "0123456789ABCDEF"; 147 long i; 148 int j; 149 150 BUF_strlcat(buf, "DEK-Info: ", PEM_BUFSIZE); 151 BUF_strlcat(buf, type, PEM_BUFSIZE); 152 BUF_strlcat(buf, ",", PEM_BUFSIZE); 153 j = strlen(buf); 154 if (j + (len * 2) + 1 > PEM_BUFSIZE) 155 return; 156 for (i = 0; i < len; i++) { 157 buf[j + i * 2] = map[(str[i] >> 4) & 0x0f]; 158 buf[j + i * 2 + 1] = map[(str[i]) & 0x0f]; 159 } 160 buf[j + i * 2] = '\n'; 161 buf[j + i * 2 + 1] = '\0'; 162} 163 164#ifndef OPENSSL_NO_FP_API 165void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x, 166 pem_password_cb *cb, void *u) 167{ 168 BIO *b; 169 void *ret; 170 171 if ((b = BIO_new(BIO_s_file())) == NULL) { 172 PEMerr(PEM_F_PEM_ASN1_READ, ERR_R_BUF_LIB); 173 return (0); 174 } 175 BIO_set_fp(b, fp, BIO_NOCLOSE); 176 ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u); 177 BIO_free(b); 178 return (ret); 179} 180#endif 181 182static int check_pem(const char *nm, const char *name) 183{ 184 /* Normal matching nm and name */ 185 if (!strcmp(nm, name)) 186 return 1; 187 188 /* Make PEM_STRING_EVP_PKEY match any private key */ 189 190 if (!strcmp(name, PEM_STRING_EVP_PKEY)) { 191 int slen; 192 const EVP_PKEY_ASN1_METHOD *ameth; 193 if (!strcmp(nm, PEM_STRING_PKCS8)) 194 return 1; 195 if (!strcmp(nm, PEM_STRING_PKCS8INF)) 196 return 1; 197 slen = pem_check_suffix(nm, "PRIVATE KEY"); 198 if (slen > 0) { 199 /* 200 * NB: ENGINE implementations wont contain a deprecated old 201 * private key decode function so don't look for them. 202 */ 203 ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen); 204 if (ameth && ameth->old_priv_decode) 205 return 1; 206 } 207 return 0; 208 } 209 210 if (!strcmp(name, PEM_STRING_PARAMETERS)) { 211 int slen; 212 const EVP_PKEY_ASN1_METHOD *ameth; 213 slen = pem_check_suffix(nm, "PARAMETERS"); 214 if (slen > 0) { 215 ENGINE *e; 216 ameth = EVP_PKEY_asn1_find_str(&e, nm, slen); 217 if (ameth) { 218 int r; 219 if (ameth->param_decode) 220 r = 1; 221 else 222 r = 0; 223#ifndef OPENSSL_NO_ENGINE 224 if (e) 225 ENGINE_finish(e); 226#endif 227 return r; 228 } 229 } 230 return 0; 231 } 232 /* If reading DH parameters handle X9.42 DH format too */ 233 if (!strcmp(nm, PEM_STRING_DHXPARAMS) && 234 !strcmp(name, PEM_STRING_DHPARAMS)) 235 return 1; 236 237 /* Permit older strings */ 238 239 if (!strcmp(nm, PEM_STRING_X509_OLD) && !strcmp(name, PEM_STRING_X509)) 240 return 1; 241 242 if (!strcmp(nm, PEM_STRING_X509_REQ_OLD) && 243 !strcmp(name, PEM_STRING_X509_REQ)) 244 return 1; 245 246 /* Allow normal certs to be read as trusted certs */ 247 if (!strcmp(nm, PEM_STRING_X509) && 248 !strcmp(name, PEM_STRING_X509_TRUSTED)) 249 return 1; 250 251 if (!strcmp(nm, PEM_STRING_X509_OLD) && 252 !strcmp(name, PEM_STRING_X509_TRUSTED)) 253 return 1; 254 255 /* Some CAs use PKCS#7 with CERTIFICATE headers */ 256 if (!strcmp(nm, PEM_STRING_X509) && !strcmp(name, PEM_STRING_PKCS7)) 257 return 1; 258 259 if (!strcmp(nm, PEM_STRING_PKCS7_SIGNED) && 260 !strcmp(name, PEM_STRING_PKCS7)) 261 return 1; 262 263#ifndef OPENSSL_NO_CMS 264 if (!strcmp(nm, PEM_STRING_X509) && !strcmp(name, PEM_STRING_CMS)) 265 return 1; 266 /* Allow CMS to be read from PKCS#7 headers */ 267 if (!strcmp(nm, PEM_STRING_PKCS7) && !strcmp(name, PEM_STRING_CMS)) 268 return 1; 269#endif 270 271 return 0; 272} 273 274int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, 275 const char *name, BIO *bp, pem_password_cb *cb, 276 void *u) 277{ 278 EVP_CIPHER_INFO cipher; 279 char *nm = NULL, *header = NULL; 280 unsigned char *data = NULL; 281 long len; 282 int ret = 0; 283 284 for (;;) { 285 if (!PEM_read_bio(bp, &nm, &header, &data, &len)) { 286 if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE) 287 ERR_add_error_data(2, "Expecting: ", name); 288 return 0; 289 } 290 if (check_pem(nm, name)) 291 break; 292 OPENSSL_free(nm); 293 OPENSSL_free(header); 294 OPENSSL_free(data); 295 } 296 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher)) 297 goto err; 298 if (!PEM_do_header(&cipher, data, &len, cb, u)) 299 goto err; 300 301 *pdata = data; 302 *plen = len; 303 304 if (pnm) 305 *pnm = nm; 306 307 ret = 1; 308 309 err: 310 if (!ret || !pnm) 311 OPENSSL_free(nm); 312 OPENSSL_free(header); 313 if (!ret) 314 OPENSSL_free(data); 315 return ret; 316} 317 318#ifndef OPENSSL_NO_FP_API 319int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp, 320 void *x, const EVP_CIPHER *enc, unsigned char *kstr, 321 int klen, pem_password_cb *callback, void *u) 322{ 323 BIO *b; 324 int ret; 325 326 if ((b = BIO_new(BIO_s_file())) == NULL) { 327 PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB); 328 return (0); 329 } 330 BIO_set_fp(b, fp, BIO_NOCLOSE); 331 ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u); 332 BIO_free(b); 333 return (ret); 334} 335#endif 336 337int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp, 338 void *x, const EVP_CIPHER *enc, unsigned char *kstr, 339 int klen, pem_password_cb *callback, void *u) 340{ 341 EVP_CIPHER_CTX ctx; 342 int dsize = 0, i, j, ret = 0; 343 unsigned char *p, *data = NULL; 344 const char *objstr = NULL; 345 char buf[PEM_BUFSIZE]; 346 unsigned char key[EVP_MAX_KEY_LENGTH]; 347 unsigned char iv[EVP_MAX_IV_LENGTH]; 348 349 if (enc != NULL) { 350 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc)); 351 if (objstr == NULL) { 352 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER); 353 goto err; 354 } 355 } 356 357 if ((dsize = i2d(x, NULL)) < 0) { 358 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB); 359 dsize = 0; 360 goto err; 361 } 362 /* dzise + 8 bytes are needed */ 363 /* actually it needs the cipher block size extra... */ 364 data = (unsigned char *)OPENSSL_malloc((unsigned int)dsize + 20); 365 if (data == NULL) { 366 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE); 367 goto err; 368 } 369 p = data; 370 i = i2d(x, &p); 371 372 if (enc != NULL) { 373 if (kstr == NULL) { 374 if (callback == NULL) 375 klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u); 376 else 377 klen = (*callback) (buf, PEM_BUFSIZE, 1, u); 378 if (klen <= 0) { 379 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_READ_KEY); 380 goto err; 381 } 382#ifdef CHARSET_EBCDIC 383 /* Convert the pass phrase from EBCDIC */ 384 ebcdic2ascii(buf, buf, klen); 385#endif 386 kstr = (unsigned char *)buf; 387 } 388 RAND_add(data, i, 0); /* put in the RSA key. */ 389 OPENSSL_assert(enc->iv_len <= (int)sizeof(iv)); 390 if (RAND_pseudo_bytes(iv, enc->iv_len) < 0) /* Generate a salt */ 391 goto err; 392 /* 393 * The 'iv' is used as the iv and as a salt. It is NOT taken from 394 * the BytesToKey function 395 */ 396 if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL)) 397 goto err; 398 399 if (kstr == (unsigned char *)buf) 400 OPENSSL_cleanse(buf, PEM_BUFSIZE); 401 402 OPENSSL_assert(strlen(objstr) + 23 + 2 * enc->iv_len + 13 <= 403 sizeof buf); 404 405 buf[0] = '\0'; 406 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED); 407 PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv); 408 /* k=strlen(buf); */ 409 410 EVP_CIPHER_CTX_init(&ctx); 411 ret = 1; 412 if (!EVP_EncryptInit_ex(&ctx, enc, NULL, key, iv) 413 || !EVP_EncryptUpdate(&ctx, data, &j, data, i) 414 || !EVP_EncryptFinal_ex(&ctx, &(data[j]), &i)) 415 ret = 0; 416 EVP_CIPHER_CTX_cleanup(&ctx); 417 if (ret == 0) 418 goto err; 419 i += j; 420 } else { 421 ret = 1; 422 buf[0] = '\0'; 423 } 424 i = PEM_write_bio(bp, name, buf, data, i); 425 if (i <= 0) 426 ret = 0; 427 err: 428 OPENSSL_cleanse(key, sizeof(key)); 429 OPENSSL_cleanse(iv, sizeof(iv)); 430 OPENSSL_cleanse((char *)&ctx, sizeof(ctx)); 431 OPENSSL_cleanse(buf, PEM_BUFSIZE); 432 if (data != NULL) { 433 OPENSSL_cleanse(data, (unsigned int)dsize); 434 OPENSSL_free(data); 435 } 436 return (ret); 437} 438 439int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen, 440 pem_password_cb *callback, void *u) 441{ 442 int i = 0, j, o, klen; 443 long len; 444 EVP_CIPHER_CTX ctx; 445 unsigned char key[EVP_MAX_KEY_LENGTH]; 446 char buf[PEM_BUFSIZE]; 447 448 len = *plen; 449 450 if (cipher->cipher == NULL) 451 return (1); 452 if (callback == NULL) 453 klen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u); 454 else 455 klen = callback(buf, PEM_BUFSIZE, 0, u); 456 if (klen <= 0) { 457 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ); 458 return (0); 459 } 460#ifdef CHARSET_EBCDIC 461 /* Convert the pass phrase from EBCDIC */ 462 ebcdic2ascii(buf, buf, klen); 463#endif 464 465 if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]), 466 (unsigned char *)buf, klen, 1, key, NULL)) 467 return 0; 468 469 j = (int)len; 470 EVP_CIPHER_CTX_init(&ctx); 471 o = EVP_DecryptInit_ex(&ctx, cipher->cipher, NULL, key, &(cipher->iv[0])); 472 if (o) 473 o = EVP_DecryptUpdate(&ctx, data, &i, data, j); 474 if (o) 475 o = EVP_DecryptFinal_ex(&ctx, &(data[i]), &j); 476 EVP_CIPHER_CTX_cleanup(&ctx); 477 OPENSSL_cleanse((char *)buf, sizeof(buf)); 478 OPENSSL_cleanse((char *)key, sizeof(key)); 479 if (o) 480 j += i; 481 else { 482 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT); 483 return (0); 484 } 485 *plen = j; 486 return (1); 487} 488 489int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) 490{ 491 const EVP_CIPHER *enc = NULL; 492 char *p, c; 493 char **header_pp = &header; 494 495 cipher->cipher = NULL; 496 if ((header == NULL) || (*header == '\0') || (*header == '\n')) 497 return (1); 498 if (strncmp(header, "Proc-Type: ", 11) != 0) { 499 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE); 500 return (0); 501 } 502 header += 11; 503 if (*header != '4') 504 return (0); 505 header++; 506 if (*header != ',') 507 return (0); 508 header++; 509 if (strncmp(header, "ENCRYPTED", 9) != 0) { 510 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED); 511 return (0); 512 } 513 for (; (*header != '\n') && (*header != '\0'); header++) ; 514 if (*header == '\0') { 515 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER); 516 return (0); 517 } 518 header++; 519 if (strncmp(header, "DEK-Info: ", 10) != 0) { 520 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO); 521 return (0); 522 } 523 header += 10; 524 525 p = header; 526 for (;;) { 527 c = *header; 528#ifndef CHARSET_EBCDIC 529 if (!(((c >= 'A') && (c <= 'Z')) || (c == '-') || 530 ((c >= '0') && (c <= '9')))) 531 break; 532#else 533 if (!(isupper(c) || (c == '-') || isdigit(c))) 534 break; 535#endif 536 header++; 537 } 538 *header = '\0'; 539 cipher->cipher = enc = EVP_get_cipherbyname(p); 540 *header = c; 541 header++; 542 543 if (enc == NULL) { 544 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION); 545 return (0); 546 } 547 if (!load_iv(header_pp, &(cipher->iv[0]), enc->iv_len)) 548 return (0); 549 550 return (1); 551} 552 553static int load_iv(char **fromp, unsigned char *to, int num) 554{ 555 int v, i; 556 char *from; 557 558 from = *fromp; 559 for (i = 0; i < num; i++) 560 to[i] = 0; 561 num *= 2; 562 for (i = 0; i < num; i++) { 563 if ((*from >= '0') && (*from <= '9')) 564 v = *from - '0'; 565 else if ((*from >= 'A') && (*from <= 'F')) 566 v = *from - 'A' + 10; 567 else if ((*from >= 'a') && (*from <= 'f')) 568 v = *from - 'a' + 10; 569 else { 570 PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS); 571 return (0); 572 } 573 from++; 574 to[i / 2] |= v << (long)((!(i & 1)) * 4); 575 } 576 577 *fromp = from; 578 return (1); 579} 580 581#ifndef OPENSSL_NO_FP_API 582int PEM_write(FILE *fp, const char *name, const char *header, 583 const unsigned char *data, long len) 584{ 585 BIO *b; 586 int ret; 587 588 if ((b = BIO_new(BIO_s_file())) == NULL) { 589 PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB); 590 return (0); 591 } 592 BIO_set_fp(b, fp, BIO_NOCLOSE); 593 ret = PEM_write_bio(b, name, header, data, len); 594 BIO_free(b); 595 return (ret); 596} 597#endif 598 599int PEM_write_bio(BIO *bp, const char *name, const char *header, 600 const unsigned char *data, long len) 601{ 602 int nlen, n, i, j, outl; 603 unsigned char *buf = NULL; 604 EVP_ENCODE_CTX ctx; 605 int reason = ERR_R_BUF_LIB; 606 607 EVP_EncodeInit(&ctx); 608 nlen = strlen(name); 609 610 if ((BIO_write(bp, "-----BEGIN ", 11) != 11) || 611 (BIO_write(bp, name, nlen) != nlen) || 612 (BIO_write(bp, "-----\n", 6) != 6)) 613 goto err; 614 615 i = strlen(header); 616 if (i > 0) { 617 if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1)) 618 goto err; 619 } 620 621 buf = OPENSSL_malloc(PEM_BUFSIZE * 8); 622 if (buf == NULL) { 623 reason = ERR_R_MALLOC_FAILURE; 624 goto err; 625 } 626 627 i = j = 0; 628 while (len > 0) { 629 n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len); 630 EVP_EncodeUpdate(&ctx, buf, &outl, &(data[j]), n); 631 if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl)) 632 goto err; 633 i += outl; 634 len -= n; 635 j += n; 636 } 637 EVP_EncodeFinal(&ctx, buf, &outl); 638 if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl)) 639 goto err; 640 OPENSSL_cleanse(buf, PEM_BUFSIZE * 8); 641 OPENSSL_free(buf); 642 buf = NULL; 643 if ((BIO_write(bp, "-----END ", 9) != 9) || 644 (BIO_write(bp, name, nlen) != nlen) || 645 (BIO_write(bp, "-----\n", 6) != 6)) 646 goto err; 647 return (i + outl); 648 err: 649 if (buf) { 650 OPENSSL_cleanse(buf, PEM_BUFSIZE * 8); 651 OPENSSL_free(buf); 652 } 653 PEMerr(PEM_F_PEM_WRITE_BIO, reason); 654 return (0); 655} 656 657#ifndef OPENSSL_NO_FP_API 658int PEM_read(FILE *fp, char **name, char **header, unsigned char **data, 659 long *len) 660{ 661 BIO *b; 662 int ret; 663 664 if ((b = BIO_new(BIO_s_file())) == NULL) { 665 PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB); 666 return (0); 667 } 668 BIO_set_fp(b, fp, BIO_NOCLOSE); 669 ret = PEM_read_bio(b, name, header, data, len); 670 BIO_free(b); 671 return (ret); 672} 673#endif 674 675int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, 676 long *len) 677{ 678 EVP_ENCODE_CTX ctx; 679 int end = 0, i, k, bl = 0, hl = 0, nohead = 0; 680 char buf[256]; 681 BUF_MEM *nameB; 682 BUF_MEM *headerB; 683 BUF_MEM *dataB, *tmpB; 684 685 nameB = BUF_MEM_new(); 686 headerB = BUF_MEM_new(); 687 dataB = BUF_MEM_new(); 688 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) { 689 BUF_MEM_free(nameB); 690 BUF_MEM_free(headerB); 691 BUF_MEM_free(dataB); 692 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); 693 return (0); 694 } 695 696 buf[254] = '\0'; 697 for (;;) { 698 i = BIO_gets(bp, buf, 254); 699 700 if (i <= 0) { 701 PEMerr(PEM_F_PEM_READ_BIO, PEM_R_NO_START_LINE); 702 goto err; 703 } 704 705 while ((i >= 0) && (buf[i] <= ' ')) 706 i--; 707 buf[++i] = '\n'; 708 buf[++i] = '\0'; 709 710 if (strncmp(buf, "-----BEGIN ", 11) == 0) { 711 i = strlen(&(buf[11])); 712 713 if (strncmp(&(buf[11 + i - 6]), "-----\n", 6) != 0) 714 continue; 715 if (!BUF_MEM_grow(nameB, i + 9)) { 716 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); 717 goto err; 718 } 719 memcpy(nameB->data, &(buf[11]), i - 6); 720 nameB->data[i - 6] = '\0'; 721 break; 722 } 723 } 724 hl = 0; 725 if (!BUF_MEM_grow(headerB, 256)) { 726 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); 727 goto err; 728 } 729 headerB->data[0] = '\0'; 730 for (;;) { 731 i = BIO_gets(bp, buf, 254); 732 if (i <= 0) 733 break; 734 735 while ((i >= 0) && (buf[i] <= ' ')) 736 i--; 737 buf[++i] = '\n'; 738 buf[++i] = '\0'; 739 740 if (buf[0] == '\n') 741 break; 742 if (!BUF_MEM_grow(headerB, hl + i + 9)) { 743 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); 744 goto err; 745 } 746 if (strncmp(buf, "-----END ", 9) == 0) { 747 nohead = 1; 748 break; 749 } 750 memcpy(&(headerB->data[hl]), buf, i); 751 headerB->data[hl + i] = '\0'; 752 hl += i; 753 } 754 755 bl = 0; 756 if (!BUF_MEM_grow(dataB, 1024)) { 757 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); 758 goto err; 759 } 760 dataB->data[0] = '\0'; 761 if (!nohead) { 762 for (;;) { 763 i = BIO_gets(bp, buf, 254); 764 if (i <= 0) 765 break; 766 767 while ((i >= 0) && (buf[i] <= ' ')) 768 i--; 769 buf[++i] = '\n'; 770 buf[++i] = '\0'; 771 772 if (i != 65) 773 end = 1; 774 if (strncmp(buf, "-----END ", 9) == 0) 775 break; 776 if (i > 65) 777 break; 778 if (!BUF_MEM_grow_clean(dataB, i + bl + 9)) { 779 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); 780 goto err; 781 } 782 memcpy(&(dataB->data[bl]), buf, i); 783 dataB->data[bl + i] = '\0'; 784 bl += i; 785 if (end) { 786 buf[0] = '\0'; 787 i = BIO_gets(bp, buf, 254); 788 if (i <= 0) 789 break; 790 791 while ((i >= 0) && (buf[i] <= ' ')) 792 i--; 793 buf[++i] = '\n'; 794 buf[++i] = '\0'; 795 796 break; 797 } 798 } 799 } else { 800 tmpB = headerB; 801 headerB = dataB; 802 dataB = tmpB; 803 bl = hl; 804 } 805 i = strlen(nameB->data); 806 if ((strncmp(buf, "-----END ", 9) != 0) || 807 (strncmp(nameB->data, &(buf[9]), i) != 0) || 808 (strncmp(&(buf[9 + i]), "-----\n", 6) != 0)) { 809 PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_END_LINE); 810 goto err; 811 } 812 813 EVP_DecodeInit(&ctx); 814 i = EVP_DecodeUpdate(&ctx, 815 (unsigned char *)dataB->data, &bl, 816 (unsigned char *)dataB->data, bl); 817 if (i < 0) { 818 PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE); 819 goto err; 820 } 821 i = EVP_DecodeFinal(&ctx, (unsigned char *)&(dataB->data[bl]), &k); 822 if (i < 0) { 823 PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE); 824 goto err; 825 } 826 bl += k; 827 828 if (bl == 0) 829 goto err; 830 *name = nameB->data; 831 *header = headerB->data; 832 *data = (unsigned char *)dataB->data; 833 *len = bl; 834 OPENSSL_free(nameB); 835 OPENSSL_free(headerB); 836 OPENSSL_free(dataB); 837 return (1); 838 err: 839 BUF_MEM_free(nameB); 840 BUF_MEM_free(headerB); 841 BUF_MEM_free(dataB); 842 return (0); 843} 844 845/* 846 * Check pem string and return prefix length. If for example the pem_str == 847 * "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" the return value is 3 for the 848 * string "RSA". 849 */ 850 851int pem_check_suffix(const char *pem_str, const char *suffix) 852{ 853 int pem_len = strlen(pem_str); 854 int suffix_len = strlen(suffix); 855 const char *p; 856 if (suffix_len + 1 >= pem_len) 857 return 0; 858 p = pem_str + pem_len - suffix_len; 859 if (strcmp(p, suffix)) 860 return 0; 861 p--; 862 if (*p != ' ') 863 return 0; 864 return p - pem_str; 865} 866