1 /* crypto/pem/pem_lib.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 #include <assert.h> 59 #include <ctype.h> 60 #include <stdio.h> 61 #include <string.h> 62 63 #include <openssl/base64.h> 64 #include <openssl/buf.h> 65 #include <openssl/des.h> 66 #include <openssl/err.h> 67 #include <openssl/evp.h> 68 #include <openssl/mem.h> 69 #include <openssl/obj.h> 70 #include <openssl/pem.h> 71 #include <openssl/rand.h> 72 #include <openssl/x509.h> 73 74 #include "../evp/internal.h" 75 76 77 #define MIN_LENGTH 4 78 79 static int load_iv(char **fromp,unsigned char *to, int num); 80 static int check_pem(const char *nm, const char *name); 81 int pem_check_suffix(const char *pem_str, const char *suffix); 82 83 void PEM_proc_type(char *buf, int type) 84 { 85 const char *str; 86 87 if (type == PEM_TYPE_ENCRYPTED) 88 str="ENCRYPTED"; 89 else if (type == PEM_TYPE_MIC_CLEAR) 90 str="MIC-CLEAR"; 91 else if (type == PEM_TYPE_MIC_ONLY) 92 str="MIC-ONLY"; 93 else 94 str="BAD-TYPE"; 95 96 BUF_strlcat(buf,"Proc-Type: 4,",PEM_BUFSIZE); 97 BUF_strlcat(buf,str,PEM_BUFSIZE); 98 BUF_strlcat(buf,"\n",PEM_BUFSIZE); 99 } 100 101 void PEM_dek_info(char *buf, const char *type, int len, char *str) 102 { 103 static const unsigned char map[17]="0123456789ABCDEF"; 104 long i; 105 int j; 106 107 BUF_strlcat(buf,"DEK-Info: ",PEM_BUFSIZE); 108 BUF_strlcat(buf,type,PEM_BUFSIZE); 109 BUF_strlcat(buf,",",PEM_BUFSIZE); 110 j=strlen(buf); 111 if (j + (len * 2) + 1 > PEM_BUFSIZE) 112 return; 113 for (i=0; i<len; i++) 114 { 115 buf[j+i*2] =map[(str[i]>>4)&0x0f]; 116 buf[j+i*2+1]=map[(str[i] )&0x0f]; 117 } 118 buf[j+i*2]='\n'; 119 buf[j+i*2+1]='\0'; 120 } 121 122 #ifndef OPENSSL_NO_FP_API 123 void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x, 124 pem_password_cb *cb, void *u) 125 { 126 BIO *b; 127 void *ret; 128 129 if ((b=BIO_new(BIO_s_file())) == NULL) 130 { 131 OPENSSL_PUT_ERROR(PEM, ERR_R_BUF_LIB); 132 return(0); 133 } 134 BIO_set_fp(b,fp,BIO_NOCLOSE); 135 ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u); 136 BIO_free(b); 137 return(ret); 138 } 139 #endif 140 141 static int check_pem(const char *nm, const char *name) 142 { 143 /* Normal matching nm and name */ 144 if (!strcmp(nm,name)) return 1; 145 146 /* Make PEM_STRING_EVP_PKEY match any private key */ 147 148 if(!strcmp(name,PEM_STRING_EVP_PKEY)) 149 { 150 int slen; 151 const EVP_PKEY_ASN1_METHOD *ameth; 152 if(!strcmp(nm,PEM_STRING_PKCS8)) 153 return 1; 154 if(!strcmp(nm,PEM_STRING_PKCS8INF)) 155 return 1; 156 slen = pem_check_suffix(nm, "PRIVATE KEY"); 157 if (slen > 0) 158 { 159 /* NB: ENGINE implementations wont contain 160 * a deprecated old private key decode function 161 * so don't look for them. 162 */ 163 ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen); 164 if (ameth && ameth->old_priv_decode) 165 return 1; 166 } 167 return 0; 168 } 169 170 if(!strcmp(name,PEM_STRING_PARAMETERS)) 171 { 172 int slen; 173 const EVP_PKEY_ASN1_METHOD *ameth; 174 slen = pem_check_suffix(nm, "PARAMETERS"); 175 if (slen > 0) 176 { 177 ENGINE *e; 178 ameth = EVP_PKEY_asn1_find_str(&e, nm, slen); 179 if (ameth) 180 { 181 int r; 182 if (ameth->param_decode) 183 r = 1; 184 else 185 r = 0; 186 return r; 187 } 188 } 189 return 0; 190 } 191 /* Permit older strings */ 192 193 if(!strcmp(nm,PEM_STRING_X509_OLD) && 194 !strcmp(name,PEM_STRING_X509)) return 1; 195 196 if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) && 197 !strcmp(name,PEM_STRING_X509_REQ)) return 1; 198 199 /* Allow normal certs to be read as trusted certs */ 200 if(!strcmp(nm,PEM_STRING_X509) && 201 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1; 202 203 if(!strcmp(nm,PEM_STRING_X509_OLD) && 204 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1; 205 206 /* Some CAs use PKCS#7 with CERTIFICATE headers */ 207 if(!strcmp(nm, PEM_STRING_X509) && 208 !strcmp(name, PEM_STRING_PKCS7)) return 1; 209 210 if(!strcmp(nm, PEM_STRING_PKCS7_SIGNED) && 211 !strcmp(name, PEM_STRING_PKCS7)) return 1; 212 213 #ifndef OPENSSL_NO_CMS 214 if(!strcmp(nm, PEM_STRING_X509) && 215 !strcmp(name, PEM_STRING_CMS)) return 1; 216 /* Allow CMS to be read from PKCS#7 headers */ 217 if(!strcmp(nm, PEM_STRING_PKCS7) && 218 !strcmp(name, PEM_STRING_CMS)) return 1; 219 #endif 220 221 return 0; 222 } 223 224 int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, const char *name, BIO *bp, 225 pem_password_cb *cb, void *u) 226 { 227 EVP_CIPHER_INFO cipher; 228 char *nm=NULL,*header=NULL; 229 unsigned char *data=NULL; 230 long len; 231 int ret = 0; 232 233 for (;;) 234 { 235 if (!PEM_read_bio(bp,&nm,&header,&data,&len)) { 236 if(ERR_GET_REASON(ERR_peek_error()) == 237 PEM_R_NO_START_LINE) 238 ERR_add_error_data(2, "Expecting: ", name); 239 return 0; 240 } 241 if(check_pem(nm, name)) break; 242 OPENSSL_free(nm); 243 OPENSSL_free(header); 244 OPENSSL_free(data); 245 } 246 if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err; 247 if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err; 248 249 *pdata = data; 250 *plen = len; 251 252 if (pnm) 253 *pnm = nm; 254 255 ret = 1; 256 257 err: 258 if (!ret || !pnm) OPENSSL_free(nm); 259 OPENSSL_free(header); 260 if (!ret) OPENSSL_free(data); 261 return ret; 262 } 263 264 #ifndef OPENSSL_NO_FP_API 265 int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp, 266 void *x, const EVP_CIPHER *enc, unsigned char *kstr, 267 int klen, pem_password_cb *callback, void *u) 268 { 269 BIO *b; 270 int ret; 271 272 if ((b=BIO_new(BIO_s_file())) == NULL) 273 { 274 OPENSSL_PUT_ERROR(PEM, ERR_R_BUF_LIB); 275 return(0); 276 } 277 BIO_set_fp(b,fp,BIO_NOCLOSE); 278 ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u); 279 BIO_free(b); 280 return(ret); 281 } 282 #endif 283 284 int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp, 285 void *x, const EVP_CIPHER *enc, unsigned char *kstr, 286 int klen, pem_password_cb *callback, void *u) 287 { 288 EVP_CIPHER_CTX ctx; 289 int dsize=0,i,j,ret=0; 290 unsigned char *p,*data=NULL; 291 const char *objstr=NULL; 292 char buf[PEM_BUFSIZE]; 293 unsigned char key[EVP_MAX_KEY_LENGTH]; 294 unsigned char iv[EVP_MAX_IV_LENGTH]; 295 296 if (enc != NULL) 297 { 298 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc)); 299 if (objstr == NULL) 300 { 301 OPENSSL_PUT_ERROR(PEM, PEM_R_UNSUPPORTED_CIPHER); 302 goto err; 303 } 304 } 305 306 if ((dsize=i2d(x,NULL)) < 0) 307 { 308 OPENSSL_PUT_ERROR(PEM, ERR_R_ASN1_LIB); 309 dsize=0; 310 goto err; 311 } 312 /* dzise + 8 bytes are needed */ 313 /* actually it needs the cipher block size extra... */ 314 data=(unsigned char *)OPENSSL_malloc((unsigned int)dsize+20); 315 if (data == NULL) 316 { 317 OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE); 318 goto err; 319 } 320 p=data; 321 i=i2d(x,&p); 322 323 if (enc != NULL) 324 { 325 const unsigned iv_len = EVP_CIPHER_iv_length(enc); 326 327 if (kstr == NULL) 328 { 329 klen = 0; 330 if (!callback) 331 callback = PEM_def_callback; 332 klen=(*callback)(buf,PEM_BUFSIZE,1,u); 333 if (klen <= 0) 334 { 335 OPENSSL_PUT_ERROR(PEM, PEM_R_READ_KEY); 336 goto err; 337 } 338 kstr=(unsigned char *)buf; 339 } 340 assert(iv_len <= (int)sizeof(iv)); 341 if (!RAND_bytes(iv, iv_len)) /* Generate a salt */ 342 goto err; 343 /* The 'iv' is used as the iv and as a salt. It is 344 * NOT taken from the BytesToKey function */ 345 if (!EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL)) 346 goto err; 347 348 if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZE); 349 350 assert(strlen(objstr)+23+2*iv_len+13 <= sizeof buf); 351 352 buf[0]='\0'; 353 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED); 354 PEM_dek_info(buf,objstr,iv_len,(char *)iv); 355 /* k=strlen(buf); */ 356 357 EVP_CIPHER_CTX_init(&ctx); 358 ret = 1; 359 if (!EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv) 360 || !EVP_EncryptUpdate(&ctx,data,&j,data,i) 361 || !EVP_EncryptFinal_ex(&ctx,&(data[j]),&i)) 362 ret = 0; 363 else 364 i += j; 365 EVP_CIPHER_CTX_cleanup(&ctx); 366 if (ret == 0) 367 goto err; 368 } 369 else 370 { 371 ret=1; 372 buf[0]='\0'; 373 } 374 i=PEM_write_bio(bp,name,buf,data,i); 375 if (i <= 0) ret=0; 376 err: 377 OPENSSL_cleanse(key,sizeof(key)); 378 OPENSSL_cleanse(iv,sizeof(iv)); 379 OPENSSL_cleanse((char *)&ctx,sizeof(ctx)); 380 OPENSSL_cleanse(buf,PEM_BUFSIZE); 381 if (data != NULL) 382 { 383 OPENSSL_cleanse(data,(unsigned int)dsize); 384 OPENSSL_free(data); 385 } 386 return(ret); 387 } 388 389 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen, 390 pem_password_cb *callback,void *u) 391 { 392 int i=0,j,o,klen; 393 long len; 394 EVP_CIPHER_CTX ctx; 395 unsigned char key[EVP_MAX_KEY_LENGTH]; 396 char buf[PEM_BUFSIZE]; 397 398 len= *plen; 399 400 if (cipher->cipher == NULL) return(1); 401 402 klen = 0; 403 if (!callback) callback = PEM_def_callback; 404 klen=callback(buf,PEM_BUFSIZE,0,u); 405 if (klen <= 0) 406 { 407 OPENSSL_PUT_ERROR(PEM, PEM_R_BAD_PASSWORD_READ); 408 return(0); 409 } 410 411 if (!EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]), 412 (unsigned char *)buf,klen,1,key,NULL)) 413 return 0; 414 415 j=(int)len; 416 EVP_CIPHER_CTX_init(&ctx); 417 o = EVP_DecryptInit_ex(&ctx,cipher->cipher,NULL, key,&(cipher->iv[0])); 418 if (o) 419 o = EVP_DecryptUpdate(&ctx,data,&i,data,j); 420 if (o) 421 o = EVP_DecryptFinal_ex(&ctx,&(data[i]),&j); 422 EVP_CIPHER_CTX_cleanup(&ctx); 423 OPENSSL_cleanse((char *)buf,sizeof(buf)); 424 OPENSSL_cleanse((char *)key,sizeof(key)); 425 if (!o) 426 { 427 OPENSSL_PUT_ERROR(PEM, PEM_R_BAD_DECRYPT); 428 return(0); 429 } 430 j+=i; 431 *plen=j; 432 return(1); 433 } 434 435 static const EVP_CIPHER* cipher_by_name(const char *name) { 436 /* This is similar to the (deprecated) function |EVP_get_cipherbyname|. */ 437 if (0 == strcmp(name, SN_rc4)) { 438 return EVP_rc4(); 439 } else if (0 == strcmp(name, SN_des_cbc)) { 440 return EVP_des_cbc(); 441 } else if (0 == strcmp(name, SN_des_ede3_cbc)) { 442 return EVP_des_ede3_cbc(); 443 } else if (0 == strcmp(name, SN_aes_128_cbc)) { 444 return EVP_aes_128_cbc(); 445 } else if (0 == strcmp(name, SN_aes_192_cbc)) { 446 return EVP_aes_192_cbc(); 447 } else if (0 == strcmp(name, SN_aes_256_cbc)) { 448 return EVP_aes_256_cbc(); 449 } else { 450 return NULL; 451 } 452 } 453 454 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) 455 { 456 const EVP_CIPHER *enc=NULL; 457 char *p,c; 458 char **header_pp = &header; 459 460 cipher->cipher=NULL; 461 if ((header == NULL) || (*header == '\0') || (*header == '\n')) 462 return(1); 463 if (strncmp(header,"Proc-Type: ",11) != 0) 464 { OPENSSL_PUT_ERROR(PEM, PEM_R_NOT_PROC_TYPE); return(0); } 465 header+=11; 466 if (*header != '4') return(0); header++; 467 if (*header != ',') return(0); header++; 468 if (strncmp(header,"ENCRYPTED",9) != 0) 469 { OPENSSL_PUT_ERROR(PEM, PEM_R_NOT_ENCRYPTED); return(0); } 470 for (; (*header != '\n') && (*header != '\0'); header++) 471 ; 472 if (*header == '\0') 473 { OPENSSL_PUT_ERROR(PEM, PEM_R_SHORT_HEADER); return(0); } 474 header++; 475 if (strncmp(header,"DEK-Info: ",10) != 0) 476 { OPENSSL_PUT_ERROR(PEM, PEM_R_NOT_DEK_INFO); return(0); } 477 header+=10; 478 479 p=header; 480 for (;;) 481 { 482 c= *header; 483 if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') || 484 ((c >= '0') && (c <= '9')))) 485 break; 486 header++; 487 } 488 *header='\0'; 489 cipher->cipher=enc=cipher_by_name(p); 490 *header=c; 491 header++; 492 493 if (enc == NULL) 494 { 495 OPENSSL_PUT_ERROR(PEM, PEM_R_UNSUPPORTED_ENCRYPTION); 496 return(0); 497 } 498 if (!load_iv(header_pp,&(cipher->iv[0]),EVP_CIPHER_iv_length(enc))) 499 return(0); 500 501 return(1); 502 } 503 504 static int load_iv(char **fromp, unsigned char *to, int num) 505 { 506 int v,i; 507 char *from; 508 509 from= *fromp; 510 for (i=0; i<num; i++) to[i]=0; 511 num*=2; 512 for (i=0; i<num; i++) 513 { 514 if ((*from >= '0') && (*from <= '9')) 515 v= *from-'0'; 516 else if ((*from >= 'A') && (*from <= 'F')) 517 v= *from-'A'+10; 518 else if ((*from >= 'a') && (*from <= 'f')) 519 v= *from-'a'+10; 520 else 521 { 522 OPENSSL_PUT_ERROR(PEM, PEM_R_BAD_IV_CHARS); 523 return(0); 524 } 525 from++; 526 to[i/2]|=v<<(long)((!(i&1))*4); 527 } 528 529 *fromp=from; 530 return(1); 531 } 532 533 #ifndef OPENSSL_NO_FP_API 534 int PEM_write(FILE *fp, const char *name, const char *header, 535 const unsigned char *data, long len) 536 { 537 BIO *b; 538 int ret; 539 540 if ((b=BIO_new(BIO_s_file())) == NULL) 541 { 542 OPENSSL_PUT_ERROR(PEM, ERR_R_BUF_LIB); 543 return(0); 544 } 545 BIO_set_fp(b,fp,BIO_NOCLOSE); 546 ret=PEM_write_bio(b, name, header, data,len); 547 BIO_free(b); 548 return(ret); 549 } 550 #endif 551 552 int PEM_write_bio(BIO *bp, const char *name, const char *header, 553 const unsigned char *data, long len) 554 { 555 int nlen,n,i,j,outl; 556 unsigned char *buf = NULL; 557 EVP_ENCODE_CTX ctx; 558 int reason=ERR_R_BUF_LIB; 559 560 EVP_EncodeInit(&ctx); 561 nlen=strlen(name); 562 563 if ( (BIO_write(bp,"-----BEGIN ",11) != 11) || 564 (BIO_write(bp,name,nlen) != nlen) || 565 (BIO_write(bp,"-----\n",6) != 6)) 566 goto err; 567 568 i=strlen(header); 569 if (i > 0) 570 { 571 if ( (BIO_write(bp,header,i) != i) || 572 (BIO_write(bp,"\n",1) != 1)) 573 goto err; 574 } 575 576 buf = OPENSSL_malloc(PEM_BUFSIZE*8); 577 if (buf == NULL) 578 { 579 reason=ERR_R_MALLOC_FAILURE; 580 goto err; 581 } 582 583 i=j=0; 584 while (len > 0) 585 { 586 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len); 587 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n); 588 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl)) 589 goto err; 590 i+=outl; 591 len-=n; 592 j+=n; 593 } 594 EVP_EncodeFinal(&ctx,buf,&outl); 595 if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err; 596 OPENSSL_cleanse(buf, PEM_BUFSIZE*8); 597 OPENSSL_free(buf); 598 buf = NULL; 599 if ( (BIO_write(bp,"-----END ",9) != 9) || 600 (BIO_write(bp,name,nlen) != nlen) || 601 (BIO_write(bp,"-----\n",6) != 6)) 602 goto err; 603 return(i+outl); 604 err: 605 if (buf) { 606 OPENSSL_cleanse(buf, PEM_BUFSIZE*8); 607 OPENSSL_free(buf); 608 } 609 OPENSSL_PUT_ERROR(PEM, reason); 610 return(0); 611 } 612 613 #ifndef OPENSSL_NO_FP_API 614 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data, 615 long *len) 616 { 617 BIO *b; 618 int ret; 619 620 if ((b=BIO_new(BIO_s_file())) == NULL) 621 { 622 OPENSSL_PUT_ERROR(PEM, ERR_R_BUF_LIB); 623 return(0); 624 } 625 BIO_set_fp(b,fp,BIO_NOCLOSE); 626 ret=PEM_read_bio(b, name, header, data,len); 627 BIO_free(b); 628 return(ret); 629 } 630 #endif 631 632 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, 633 long *len) 634 { 635 EVP_ENCODE_CTX ctx; 636 int end=0,i,k,bl=0,hl=0,nohead=0; 637 char buf[256]; 638 BUF_MEM *nameB; 639 BUF_MEM *headerB; 640 BUF_MEM *dataB,*tmpB; 641 642 nameB=BUF_MEM_new(); 643 headerB=BUF_MEM_new(); 644 dataB=BUF_MEM_new(); 645 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) 646 { 647 BUF_MEM_free(nameB); 648 BUF_MEM_free(headerB); 649 BUF_MEM_free(dataB); 650 OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE); 651 return(0); 652 } 653 654 buf[254]='\0'; 655 for (;;) 656 { 657 i=BIO_gets(bp,buf,254); 658 659 if (i <= 0) 660 { 661 OPENSSL_PUT_ERROR(PEM, PEM_R_NO_START_LINE); 662 goto err; 663 } 664 665 while ((i >= 0) && (buf[i] <= ' ')) i--; 666 buf[++i]='\n'; buf[++i]='\0'; 667 668 if (strncmp(buf,"-----BEGIN ",11) == 0) 669 { 670 i=strlen(&(buf[11])); 671 672 if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0) 673 continue; 674 if (!BUF_MEM_grow(nameB,i+9)) 675 { 676 OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE); 677 goto err; 678 } 679 memcpy(nameB->data,&(buf[11]),i-6); 680 nameB->data[i-6]='\0'; 681 break; 682 } 683 } 684 hl=0; 685 if (!BUF_MEM_grow(headerB,256)) 686 { OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE); goto err; } 687 headerB->data[0]='\0'; 688 for (;;) 689 { 690 i=BIO_gets(bp,buf,254); 691 if (i <= 0) break; 692 693 while ((i >= 0) && (buf[i] <= ' ')) i--; 694 buf[++i]='\n'; buf[++i]='\0'; 695 696 if (buf[0] == '\n') break; 697 if (!BUF_MEM_grow(headerB,hl+i+9)) 698 { OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE); goto err; } 699 if (strncmp(buf,"-----END ",9) == 0) 700 { 701 nohead=1; 702 break; 703 } 704 memcpy(&(headerB->data[hl]),buf,i); 705 headerB->data[hl+i]='\0'; 706 hl+=i; 707 } 708 709 bl=0; 710 if (!BUF_MEM_grow(dataB,1024)) 711 { OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE); goto err; } 712 dataB->data[0]='\0'; 713 if (!nohead) 714 { 715 for (;;) 716 { 717 i=BIO_gets(bp,buf,254); 718 if (i <= 0) break; 719 720 while ((i >= 0) && (buf[i] <= ' ')) i--; 721 buf[++i]='\n'; buf[++i]='\0'; 722 723 if (i != 65) end=1; 724 if (strncmp(buf,"-----END ",9) == 0) 725 break; 726 if (i > 65) break; 727 if (!BUF_MEM_grow_clean(dataB,i+bl+9)) 728 { 729 OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE); 730 goto err; 731 } 732 memcpy(&(dataB->data[bl]),buf,i); 733 dataB->data[bl+i]='\0'; 734 bl+=i; 735 if (end) 736 { 737 buf[0]='\0'; 738 i=BIO_gets(bp,buf,254); 739 if (i <= 0) break; 740 741 while ((i >= 0) && (buf[i] <= ' ')) i--; 742 buf[++i]='\n'; buf[++i]='\0'; 743 744 break; 745 } 746 } 747 } 748 else 749 { 750 tmpB=headerB; 751 headerB=dataB; 752 dataB=tmpB; 753 bl=hl; 754 } 755 i=strlen(nameB->data); 756 if ( (strncmp(buf,"-----END ",9) != 0) || 757 (strncmp(nameB->data,&(buf[9]),i) != 0) || 758 (strncmp(&(buf[9+i]),"-----\n",6) != 0)) 759 { 760 OPENSSL_PUT_ERROR(PEM, PEM_R_BAD_END_LINE); 761 goto err; 762 } 763 764 EVP_DecodeInit(&ctx); 765 i=EVP_DecodeUpdate(&ctx, 766 (unsigned char *)dataB->data,&bl, 767 (unsigned char *)dataB->data,bl); 768 if (i < 0) 769 { 770 OPENSSL_PUT_ERROR(PEM, PEM_R_BAD_BASE64_DECODE); 771 goto err; 772 } 773 i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k); 774 if (i < 0) 775 { 776 OPENSSL_PUT_ERROR(PEM, PEM_R_BAD_BASE64_DECODE); 777 goto err; 778 } 779 bl+=k; 780 781 if (bl == 0) goto err; 782 *name=nameB->data; 783 *header=headerB->data; 784 *data=(unsigned char *)dataB->data; 785 *len=bl; 786 OPENSSL_free(nameB); 787 OPENSSL_free(headerB); 788 OPENSSL_free(dataB); 789 return(1); 790 err: 791 BUF_MEM_free(nameB); 792 BUF_MEM_free(headerB); 793 BUF_MEM_free(dataB); 794 return(0); 795 } 796 797 /* Check pem string and return prefix length. 798 * If for example the pem_str == "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" 799 * the return value is 3 for the string "RSA". 800 */ 801 802 int pem_check_suffix(const char *pem_str, const char *suffix) 803 { 804 int pem_len = strlen(pem_str); 805 int suffix_len = strlen(suffix); 806 const char *p; 807 if (suffix_len + 1 >= pem_len) 808 return 0; 809 p = pem_str + pem_len - suffix_len; 810 if (strcmp(p, suffix)) 811 return 0; 812 p--; 813 if (*p != ' ') 814 return 0; 815 return p - pem_str; 816 } 817 818 int PEM_def_callback(char *buf, int size, int rwflag, void *userdata) 819 { 820 if (!buf || !userdata) 821 { 822 return 0; 823 } 824 size_t len = strlen((char *) userdata); 825 if (len >= (size_t) size) 826 { 827 return 0; 828 } 829 strcpy(buf, (char *) userdata); 830 return len; 831 } 832
