crypto/pem/pem_lib.c

   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 "cryptlib.h"
  61 #include "buffer.h"
  62 #include "objects.h"
  63 #include "evp.h"
  64 #include "rand.h"
  65 #include "x509.h"
  66 #include "pem.h"
  67 #ifndef NO_DES
  68 #include "des.h"
  69 #endif
  70
  71 char *PEM_version="PEM part of SSLeay 0.9.1a 06-Jul-1998";
  72
  73 #define MIN_LENGTH      4
  74
  75 /* PEMerr(PEM_F_PEM_WRITE_BIO,ERR_R_MALLOC_FAILURE);
  76  * PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
  77  */
  78
  79 #ifndef NOPROTO
  80 static int def_callback(char *buf, int num, int w);
  81 static int load_iv(unsigned char **fromp,unsigned char *to, int num);
  82 #else
  83 static int def_callback();
  84 static int load_iv();
  85 #endif
  86
  87 static int def_callback(buf, num, w)
  88 char *buf;
  89 int num;
  90 int w;
  91         {
  92 #ifdef NO_FP_API
  93         /* We should not ever call the default callback routine from
  94          * windows. */
  95         PEMerr(PEM_F_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
  96         return(-1);
  97 #else
  98         int i,j;
  99         char *prompt;
 100
 101         prompt=EVP_get_pw_prompt();
 102         if (prompt == NULL)
 103                 prompt="Enter PEM pass phrase:";
 104
 105         for (;;)
 106                 {
 107                 i=EVP_read_pw_string(buf,num,prompt,w);
 108                 if (i != 0)
 109                         {
 110                         PEMerr(PEM_F_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                         {
 117                         fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);
 118                         }
 119                 else
 120                         break;
 121                 }
 122         return(j);
 123 #endif
 124         }
 125
 126 void PEM_proc_type(buf, type)
 127 char *buf;
 128 int type;
 129         {
 130         char *str;
 131
 132         if (type == PEM_TYPE_ENCRYPTED)
 133                 str="ENCRYPTED";
 134         else if (type == PEM_TYPE_MIC_CLEAR)
 135                 str="MIC-CLEAR";
 136         else if (type == PEM_TYPE_MIC_ONLY)
 137                 str="MIC-ONLY";
 138         else
 139                 str="BAD-TYPE";
 140
 141         strcat(buf,"Proc-Type: 4,");
 142         strcat(buf,str);
 143         strcat(buf,"\n");
 144         }
 145
 146 void PEM_dek_info(buf, type, len, str)
 147 char *buf;
 148 char *type;
 149 int len;
 150 char *str;
 151         {
 152         static unsigned char map[17]="0123456789ABCDEF";
 153         long i;
 154         int j;
 155
 156         strcat(buf,"DEK-Info: ");
 157         strcat(buf,type);
 158         strcat(buf,",");
 159         j=strlen(buf);
 160         for (i=0; i<len; i++)
 161                 {
 162                 buf[j+i*2]  =map[(str[i]>>4)&0x0f];
 163                 buf[j+i*2+1]=map[(str[i]   )&0x0f];
 164                 }
 165         buf[j+i*2]='\n';
 166         buf[j+i*2+1]='\0';
 167         }
 168
 169 #ifndef NO_FP_API
 170 char *PEM_ASN1_read(d2i,name,fp, x, cb)
 171 char *(*d2i)();
 172 char *name;
 173 FILE *fp;
 174 char **x;
 175 int (*cb)();
 176         {
 177         BIO *b;
 178         char *ret;
 179
 180         if ((b=BIO_new(BIO_s_file())) == NULL)
 181                 {
 182                 PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
 183                 return(0);
 184                 }
 185         BIO_set_fp(b,fp,BIO_NOCLOSE);
 186         ret=PEM_ASN1_read_bio(d2i,name,b,x,cb);
 187         BIO_free(b);
 188         return(ret);
 189         }
 190 #endif
 191
 192 char *PEM_ASN1_read_bio(d2i,name,bp, x, cb)
 193 char *(*d2i)();
 194 char *name;
 195 BIO *bp;
 196 char **x;
 197 int (*cb)();
 198         {
 199         EVP_CIPHER_INFO cipher;
 200         char *nm=NULL,*header=NULL;
 201         unsigned char *p=NULL,*data=NULL;
 202         long len;
 203         char *ret=NULL;
 204
 205         for (;;)
 206                 {
 207                 if (!PEM_read_bio(bp,&nm,&header,&data,&len)) return(NULL);
 208                 if (    (strcmp(nm,name) == 0) ||
 209                         ((strcmp(nm,PEM_STRING_RSA) == 0) &&
 210                          (strcmp(name,PEM_STRING_EVP_PKEY) == 0)) ||
 211                         ((strcmp(nm,PEM_STRING_DSA) == 0) &&
 212                          (strcmp(name,PEM_STRING_EVP_PKEY) == 0)) ||
 213                         ((strcmp(nm,PEM_STRING_X509_OLD) == 0) &&
 214                          (strcmp(name,PEM_STRING_X509) == 0)) ||
 215                         ((strcmp(nm,PEM_STRING_X509_REQ_OLD) == 0) &&
 216                          (strcmp(name,PEM_STRING_X509_REQ) == 0))
 217                         )
 218                         break;
 219                 Free(nm);
 220                 Free(header);
 221                 Free(data);
 222                 }
 223         if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
 224         if (!PEM_do_header(&cipher,data,&len,cb)) goto err;
 225         p=data;
 226         if (strcmp(name,PEM_STRING_EVP_PKEY) == 0)
 227                 {
 228                 if (strcmp(nm,PEM_STRING_RSA) == 0)
 229                         ret=d2i(EVP_PKEY_RSA,x,&p,len);
 230                 else if (strcmp(nm,PEM_STRING_DSA) == 0)
 231                         ret=d2i(EVP_PKEY_DSA,x,&p,len);
 232                 }
 233         else
 234                 ret=d2i(x,&p,len);
 235         if (ret == NULL)
 236                 PEMerr(PEM_F_PEM_ASN1_READ_BIO,ERR_R_ASN1_LIB);
 237 err:
 238         Free(nm);
 239         Free(header);
 240         Free(data);
 241         return(ret);
 242         }
 243
 244 #ifndef NO_FP_API
 245 int PEM_ASN1_write(i2d,name,fp, x, enc, kstr, klen, callback)
 246 int (*i2d)();
 247 char *name;
 248 FILE *fp;
 249 char *x;
 250 EVP_CIPHER *enc;
 251 unsigned char *kstr;
 252 int klen;
 253 int (*callback)();
 254         {
 255         BIO *b;
 256         int ret;
 257
 258         if ((b=BIO_new(BIO_s_file())) == NULL)
 259                 {
 260                 PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
 261                 return(0);
 262                 }
 263         BIO_set_fp(b,fp,BIO_NOCLOSE);
 264         ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback);
 265         BIO_free(b);
 266         return(ret);
 267         }
 268 #endif
 269
 270 int PEM_ASN1_write_bio(i2d,name,bp, x, enc, kstr, klen, callback)
 271 int (*i2d)();
 272 char *name;
 273 BIO *bp;
 274 char *x;
 275 EVP_CIPHER *enc;
 276 unsigned char *kstr;
 277 int klen;
 278 int (*callback)();
 279         {
 280         EVP_CIPHER_CTX ctx;
 281         int dsize=0,i,j,ret=0;
 282         unsigned char *p,*data=NULL;
 283         char *objstr=NULL;
 284 #define PEM_BUFSIZE     1024
 285         char buf[PEM_BUFSIZE];
 286         unsigned char key[EVP_MAX_KEY_LENGTH];
 287         unsigned char iv[EVP_MAX_IV_LENGTH];
 288
 289         if (enc != NULL)
 290                 {
 291                 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
 292                 if (objstr == NULL)
 293                         {
 294                         PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
 295                         goto err;
 296                         }
 297                 }
 298
 299         if ((dsize=i2d(x,NULL)) < 0)
 300                 {
 301                 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
 302                 dsize=0;
 303                 goto err;
 304                 }
 305         /* dzise + 8 bytes are needed */
 306         data=(unsigned char *)Malloc((unsigned int)dsize+20);
 307         if (data == NULL)
 308                 {
 309                 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
 310                 goto err;
 311                 }
 312         p=data;
 313         i=i2d(x,&p);
 314
 315         if (enc != NULL)
 316                 {
 317                 if (kstr == NULL)
 318                         {
 319                         if (callback == NULL)
 320                                 klen=def_callback(buf,PEM_BUFSIZE,1);
 321                         else
 322                                 klen=(*callback)(buf,PEM_BUFSIZE,1);
 323                         if (klen <= 0)
 324                                 {
 325                                 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
 326                                 goto err;
 327                                 }
 328                         kstr=(unsigned char *)buf;
 329                         }
 330                 RAND_seed(data,i);/* put in the RSA key. */
 331                 RAND_bytes(iv,8);       /* Generate a salt */
 332                 /* The 'iv' is used as the iv and as a salt.  It is
 333                  * NOT taken from the BytesToKey function */
 334                 EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
 335
 336                 if (kstr == (unsigned char *)buf) memset(buf,0,PEM_BUFSIZE);
 337
 338                 buf[0]='\0';
 339                 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
 340                 PEM_dek_info(buf,objstr,8,(char *)iv);
 341                 /* k=strlen(buf); */
 342
 343                 EVP_EncryptInit(&ctx,enc,key,iv);
 344                 EVP_EncryptUpdate(&ctx,data,&j,data,i);
 345                 EVP_EncryptFinal(&ctx,&(data[j]),&i);
 346                 i+=j;
 347                 ret=1;
 348                 }
 349         else
 350                 {
 351                 ret=1;
 352                 buf[0]='\0';
 353                 }
 354         i=PEM_write_bio(bp,name,buf,data,i);
 355         if (i <= 0) ret=0;
 356 err:
 357         memset(key,0,sizeof(key));
 358         memset(iv,0,sizeof(iv));
 359         memset((char *)&ctx,0,sizeof(ctx));
 360         memset(buf,0,PEM_BUFSIZE);
 361         memset(data,0,(unsigned int)dsize);
 362         Free(data);
 363         return(ret);
 364         }
 365
 366 int PEM_do_header(cipher, data, plen, callback)
 367 EVP_CIPHER_INFO *cipher;
 368 unsigned char *data;
 369 long *plen;
 370 int (*callback)();
 371         {
 372         int i,j,o,klen;
 373         long len;
 374         EVP_CIPHER_CTX ctx;
 375         unsigned char key[EVP_MAX_KEY_LENGTH];
 376         char buf[PEM_BUFSIZE];
 377
 378         len= *plen;
 379
 380         if (cipher->cipher == NULL) return(1);
 381         if (callback == NULL)
 382                 klen=def_callback(buf,PEM_BUFSIZE,0);
 383         else
 384                 klen=callback(buf,PEM_BUFSIZE,0);
 385         if (klen <= 0)
 386                 {
 387                 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
 388                 return(0);
 389                 }
 390         EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
 391                 (unsigned char *)buf,klen,1,key,NULL);
 392
 393         j=(int)len;
 394         EVP_DecryptInit(&ctx,cipher->cipher,key,&(cipher->iv[0]));
 395         EVP_DecryptUpdate(&ctx,data,&i,data,j);
 396         o=EVP_DecryptFinal(&ctx,&(data[i]),&j);
 397         EVP_CIPHER_CTX_cleanup(&ctx);
 398         memset((char *)buf,0,sizeof(buf));
 399         memset((char *)key,0,sizeof(key));
 400         j+=i;
 401         if (!o)
 402                 {
 403                 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
 404                 return(0);
 405                 }
 406         *plen=j;
 407         return(1);
 408         }
 409
 410 int PEM_get_EVP_CIPHER_INFO(header,cipher)
 411 char *header;
 412 EVP_CIPHER_INFO *cipher;
 413         {
 414         int o;
 415         EVP_CIPHER *enc=NULL;
 416         char *p,c;
 417
 418         cipher->cipher=NULL;
 419         if ((header == NULL) || (*header == '\0') || (*header == '\n'))
 420                 return(1);
 421         if (strncmp(header,"Proc-Type: ",11) != 0)
 422                 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
 423         header+=11;
 424         if (*header != '4') return(0); header++;
 425         if (*header != ',') return(0); header++;
 426         if (strncmp(header,"ENCRYPTED",9) != 0)
 427                 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
 428         for (; (*header != '\n') && (*header != '\0'); header++)
 429                 ;
 430         if (*header == '\0')
 431                 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
 432         header++;
 433         if (strncmp(header,"DEK-Info: ",10) != 0)
 434                 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
 435         header+=10;
 436
 437         p=header;
 438         for (;;)
 439                 {
 440                 c= *header;
 441                 if (!(  ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
 442                         ((c >= '0') && (c <= '9'))))
 443                         break;
 444                 header++;
 445                 }
 446         *header='\0';
 447         o=OBJ_sn2nid(p);
 448         cipher->cipher=enc=EVP_get_cipherbyname(p);
 449         *header=c;
 450         header++;
 451
 452         if (enc == NULL)
 453                 {
 454                 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
 455                 return(0);
 456                 }
 457         if (!load_iv((unsigned char **)&header,&(cipher->iv[0]),8)) return(0);
 458
 459         return(1);
 460         }
 461
 462 static int load_iv(fromp,to,num)
 463 unsigned char **fromp,*to;
 464 int num;
 465         {
 466         int v,i;
 467         unsigned char *from;
 468
 469         from= *fromp;
 470         for (i=0; i<num; i++) to[i]=0;
 471         num*=2;
 472         for (i=0; i<num; i++)
 473                 {
 474                 if ((*from >= '0') && (*from <= '9'))
 475                         v= *from-'0';
 476                 else if ((*from >= 'A') && (*from <= 'F'))
 477                         v= *from-'A'+10;
 478                 else if ((*from >= 'a') && (*from <= 'f'))
 479                         v= *from-'a'+10;
 480                 else
 481                         {
 482                         PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
 483                         return(0);
 484                         }
 485                 from++;
 486                 to[i/2]|=v<<(long)((!(i&1))*4);
 487                 }
 488
 489         *fromp=from;
 490         return(1);
 491         }
 492
 493 #ifndef NO_FP_API
 494 int PEM_write(fp, name, header, data,len)
 495 FILE *fp;
 496 char *name;
 497 char *header;
 498 unsigned char *data;
 499 long len;
 500         {
 501         BIO *b;
 502         int ret;
 503
 504         if ((b=BIO_new(BIO_s_file())) == NULL)
 505                 {
 506                 PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
 507                 return(0);
 508                 }
 509         BIO_set_fp(b,fp,BIO_NOCLOSE);
 510         ret=PEM_write_bio(b, name, header, data,len);
 511         BIO_free(b);
 512         return(ret);
 513         }
 514 #endif
 515
 516 int PEM_write_bio(bp, name, header, data,len)
 517 BIO *bp;
 518 char *name;
 519 char *header;
 520 unsigned char *data;
 521 long len;
 522         {
 523         int nlen,n,i,j,outl;
 524         unsigned char *buf;
 525         EVP_ENCODE_CTX ctx;
 526         int reason=ERR_R_BUF_LIB;
 527
 528         EVP_EncodeInit(&ctx);
 529         nlen=strlen(name);
 530
 531         if (    (BIO_write(bp,"-----BEGIN ",11) != 11) ||
 532                 (BIO_write(bp,name,nlen) != nlen) ||
 533                 (BIO_write(bp,"-----\n",6) != 6))
 534                 goto err;
 535
 536         i=strlen(header);
 537         if (i > 0)
 538                 {
 539                 if (    (BIO_write(bp,header,i) != i) ||
 540                         (BIO_write(bp,"\n",1) != 1))
 541                         goto err;
 542                 }
 543
 544         buf=(unsigned char *)Malloc(PEM_BUFSIZE*8);
 545         if (buf == NULL)
 546                 {
 547                 reason=ERR_R_MALLOC_FAILURE;
 548                 goto err;
 549                 }
 550
 551         i=j=0;
 552         while (len > 0)
 553                 {
 554                 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
 555                 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
 556                 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
 557                         goto err;
 558                 i+=outl;
 559                 len-=n;
 560                 j+=n;
 561                 }
 562         EVP_EncodeFinal(&ctx,buf,&outl);
 563         if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
 564         Free(buf);
 565         if (    (BIO_write(bp,"-----END ",9) != 9) ||
 566                 (BIO_write(bp,name,nlen) != nlen) ||
 567                 (BIO_write(bp,"-----\n",6) != 6))
 568                 goto err;
 569         return(i+outl);
 570 err:
 571         PEMerr(PEM_F_PEM_WRITE_BIO,reason);
 572         return(0);
 573         }
 574
 575 #ifndef NO_FP_API
 576 int PEM_read(fp, name, header, data,len)
 577 FILE *fp;
 578 char **name;
 579 char **header;
 580 unsigned char **data;
 581 long *len;
 582         {
 583         BIO *b;
 584         int ret;
 585
 586         if ((b=BIO_new(BIO_s_file())) == NULL)
 587                 {
 588                 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
 589                 return(0);
 590                 }
 591         BIO_set_fp(b,fp,BIO_NOCLOSE);
 592         ret=PEM_read_bio(b, name, header, data,len);
 593         BIO_free(b);
 594         return(ret);
 595         }
 596 #endif
 597
 598 int PEM_read_bio(bp, name, header, data, len)
 599 BIO *bp;
 600 char **name;
 601 char **header;
 602 unsigned char **data;
 603 long *len;
 604         {
 605         EVP_ENCODE_CTX ctx;
 606         int end=0,i,k,bl=0,hl=0,nohead=0;
 607         char buf[256];
 608         BUF_MEM *nameB;
 609         BUF_MEM *headerB;
 610         BUF_MEM *dataB,*tmpB;
 611
 612         nameB=BUF_MEM_new();
 613         headerB=BUF_MEM_new();
 614         dataB=BUF_MEM_new();
 615         if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
 616                 {
 617                 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
 618                 return(0);
 619                 }
 620
 621         buf[254]='\0';
 622         for (;;)
 623                 {
 624                 i=BIO_gets(bp,buf,254);
 625
 626                 if (i <= 0)
 627                         {
 628                         PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
 629                         goto err;
 630                         }
 631
 632                 while ((i >= 0) && (buf[i] <= ' ')) i--;
 633                 buf[++i]='\n'; buf[++i]='\0';
 634
 635                 if (strncmp(buf,"-----BEGIN ",11) == 0)
 636                         {
 637                         i=strlen(&(buf[11]));
 638
 639                         if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
 640                                 continue;
 641                         if (!BUF_MEM_grow(nameB,i+9))
 642                                 {
 643                                 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
 644                                 goto err;
 645                                 }
 646                         strncpy(nameB->data,&(buf[11]),(unsigned int)i-6);
 647                         nameB->data[i-6]='\0';
 648                         break;
 649                         }
 650                 }
 651         hl=0;
 652         if (!BUF_MEM_grow(headerB,256))
 653                 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
 654         headerB->data[0]='\0';
 655         for (;;)
 656                 {
 657                 i=BIO_gets(bp,buf,254);
 658                 if (i <= 0) break;
 659
 660                 while ((i >= 0) && (buf[i] <= ' ')) i--;
 661                 buf[++i]='\n'; buf[++i]='\0';
 662
 663                 if (buf[0] == '\n') break;
 664                 if (!BUF_MEM_grow(headerB,hl+i+9))
 665                         { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
 666                 if (strncmp(buf,"-----END ",9) == 0)
 667                         {
 668                         nohead=1;
 669                         break;
 670                         }
 671                 strncpy(&(headerB->data[hl]),buf,(unsigned int)i);
 672                 headerB->data[hl+i]='\0';
 673                 hl+=i;
 674                 }
 675
 676         bl=0;
 677         if (!BUF_MEM_grow(dataB,1024))
 678                 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
 679         dataB->data[0]='\0';
 680         if (!nohead)
 681                 {
 682                 for (;;)
 683                         {
 684                         i=BIO_gets(bp,buf,254);
 685                         if (i <= 0) break;
 686
 687                         while ((i >= 0) && (buf[i] <= ' ')) i--;
 688                         buf[++i]='\n'; buf[++i]='\0';
 689
 690                         if (i != 65) end=1;
 691                         if (strncmp(buf,"-----END ",9) == 0)
 692                                 break;
 693                         if (i > 65) break;
 694                         if (!BUF_MEM_grow(dataB,i+bl+9))
 695                                 {
 696                                 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
 697                                 goto err;
 698                                 }
 699                         strncpy(&(dataB->data[bl]),buf,(unsigned int)i);
 700                         dataB->data[bl+i]='\0';
 701                         bl+=i;
 702                         if (end)
 703                                 {
 704                                 buf[0]='\0';
 705                                 i=BIO_gets(bp,buf,254);
 706                                 if (i <= 0) break;
 707
 708                                 while ((i >= 0) && (buf[i] <= ' ')) i--;
 709                                 buf[++i]='\n'; buf[++i]='\0';
 710
 711                                 break;
 712                                 }
 713                         }
 714                 }
 715         else
 716                 {
 717                 tmpB=headerB;
 718                 headerB=dataB;
 719                 dataB=tmpB;
 720                 bl=hl;
 721                 }
 722         i=strlen(nameB->data);
 723         if (    (strncmp(buf,"-----END ",9) != 0) ||
 724                 (strncmp(nameB->data,&(buf[9]),(unsigned int)i) != 0) ||
 725                 (strncmp(&(buf[9+i]),"-----\n",6) != 0))
 726                 {
 727                 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
 728                 goto err;
 729                 }
 730
 731         EVP_DecodeInit(&ctx);
 732         i=EVP_DecodeUpdate(&ctx,
 733                 (unsigned char *)dataB->data,&bl,
 734                 (unsigned char *)dataB->data,bl);
 735         if (i < 0)
 736                 {
 737                 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
 738                 goto err;
 739                 }
 740         i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
 741         if (i < 0)
 742                 {
 743                 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
 744                 goto err;
 745                 }
 746         bl+=k;
 747
 748         if (bl == 0) goto err;
 749         *name=nameB->data;
 750         *header=headerB->data;
 751         *data=(unsigned char *)dataB->data;
 752         *len=bl;
 753         Free(nameB);
 754         Free(headerB);
 755         Free(dataB);
 756         return(1);
 757 err:
 758         BUF_MEM_free(nameB);
 759         BUF_MEM_free(headerB);
 760         BUF_MEM_free(dataB);
 761         return(0);
 762         }