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 <openssl/buffer.h>
  62 #include <openssl/objects.h>
  63 #include <openssl/evp.h>
  64 #include <openssl/rand.h>
  65 #include <openssl/x509.h>
  66 #include <openssl/pem.h>
  67 #include <openssl/pkcs12.h>
  68 #ifndef OPENSSL_NO_DES
  69 #include <openssl/des.h>
  70 #endif
  71
  72 const char *PEM_version="PEM" OPENSSL_VERSION_PTEXT;
  73
  74 #define MIN_LENGTH      4
  75
  76 static int load_iv(unsigned char **fromp,unsigned char *to, int num);
  77 static int check_pem(const char *nm, const char *name);
  78
  79 int PEM_def_callback(char *buf, int num, int w, void *key)
  80         {
  81 #ifdef OPENSSL_NO_FP_API
  82         /* We should not ever call the default callback routine from
  83          * windows. */
  84         PEMerr(PEM_F_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
  85         return(-1);
  86 #else
  87         int i,j;
  88         const char *prompt;
  89         if(key) {
  90                 i=strlen(key);
  91                 i=(i > num)?num:i;
  92                 memcpy(buf,key,i);
  93                 return(i);
  94         }
  95
  96         prompt=EVP_get_pw_prompt();
  97         if (prompt == NULL)
  98                 prompt="Enter PEM pass phrase:";
  99
 100         for (;;)
 101                 {
 102                 i=EVP_read_pw_string(buf,num,prompt,w);
 103                 if (i != 0)
 104                         {
 105                         PEMerr(PEM_F_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);
 106                         memset(buf,0,(unsigned int)num);
 107                         return(-1);
 108                         }
 109                 j=strlen(buf);
 110                 if (j < MIN_LENGTH)
 111                         {
 112                         fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);
 113                         }
 114                 else
 115                         break;
 116                 }
 117         return(j);
 118 #endif
 119         }
 120
 121 void PEM_proc_type(char *buf, int type)
 122         {
 123         const char *str;
 124
 125         if (type == PEM_TYPE_ENCRYPTED)
 126                 str="ENCRYPTED";
 127         else if (type == PEM_TYPE_MIC_CLEAR)
 128                 str="MIC-CLEAR";
 129         else if (type == PEM_TYPE_MIC_ONLY)
 130                 str="MIC-ONLY";
 131         else
 132                 str="BAD-TYPE";
 133
 134         strcat(buf,"Proc-Type: 4,");
 135         strcat(buf,str);
 136         strcat(buf,"\n");
 137         }
 138
 139 void PEM_dek_info(char *buf, const char *type, int len, char *str)
 140         {
 141         static unsigned char map[17]="0123456789ABCDEF";
 142         long i;
 143         int j;
 144
 145         strcat(buf,"DEK-Info: ");
 146         strcat(buf,type);
 147         strcat(buf,",");
 148         j=strlen(buf);
 149         for (i=0; i<len; i++)
 150                 {
 151                 buf[j+i*2]  =map[(str[i]>>4)&0x0f];
 152                 buf[j+i*2+1]=map[(str[i]   )&0x0f];
 153                 }
 154         buf[j+i*2]='\n';
 155         buf[j+i*2+1]='\0';
 156         }
 157
 158 #ifndef OPENSSL_NO_FP_API
 159 char *PEM_ASN1_read(char *(*d2i)(), const char *name, FILE *fp, char **x,
 160              pem_password_cb *cb, void *u)
 161         {
 162         BIO *b;
 163         char *ret;
 164
 165         if ((b=BIO_new(BIO_s_file())) == NULL)
 166                 {
 167                 PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
 168                 return(0);
 169                 }
 170         BIO_set_fp(b,fp,BIO_NOCLOSE);
 171         ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u);
 172         BIO_free(b);
 173         return(ret);
 174         }
 175 #endif
 176
 177 static int check_pem(const char *nm, const char *name)
 178 {
 179         /* Normal matching nm and name */
 180         if (!strcmp(nm,name)) return 1;
 181
 182         /* Make PEM_STRING_EVP_PKEY match any private key */
 183
 184         if(!strcmp(nm,PEM_STRING_PKCS8) &&
 185                 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
 186
 187         if(!strcmp(nm,PEM_STRING_PKCS8INF) &&
 188                  !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
 189
 190         if(!strcmp(nm,PEM_STRING_RSA) &&
 191                 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
 192
 193         if(!strcmp(nm,PEM_STRING_DSA) &&
 194                  !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
 195
 196         if(!strcmp(nm,PEM_STRING_ECDSA) &&
 197                  !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
 198         /* Permit older strings */
 199
 200         if(!strcmp(nm,PEM_STRING_X509_OLD) &&
 201                 !strcmp(name,PEM_STRING_X509)) return 1;
 202
 203         if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) &&
 204                 !strcmp(name,PEM_STRING_X509_REQ)) return 1;
 205
 206         /* Allow normal certs to be read as trusted certs */
 207         if(!strcmp(nm,PEM_STRING_X509) &&
 208                 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
 209
 210         if(!strcmp(nm,PEM_STRING_X509_OLD) &&
 211                 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
 212
 213         /* Some CAs use PKCS#7 with CERTIFICATE headers */
 214         if(!strcmp(nm, PEM_STRING_X509) &&
 215                 !strcmp(name, PEM_STRING_PKCS7)) return 1;
 216
 217         return 0;
 218 }
 219
 220 int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, const char *name, BIO *bp,
 221              pem_password_cb *cb, void *u)
 222         {
 223         EVP_CIPHER_INFO cipher;
 224         char *nm=NULL,*header=NULL;
 225         unsigned char *data=NULL;
 226         long len;
 227         int ret = 0;
 228
 229         for (;;)
 230                 {
 231                 if (!PEM_read_bio(bp,&nm,&header,&data,&len)) {
 232                         if(ERR_GET_REASON(ERR_peek_error()) ==
 233                                 PEM_R_NO_START_LINE)
 234                                 ERR_add_error_data(2, "Expecting: ", name);
 235                         return 0;
 236                 }
 237                 if(check_pem(nm, name)) break;
 238                 OPENSSL_free(nm);
 239                 OPENSSL_free(header);
 240                 OPENSSL_free(data);
 241                 }
 242         if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
 243         if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err;
 244
 245         *pdata = data;
 246         *plen = len;
 247
 248         if (pnm)
 249                 *pnm = nm;
 250
 251         ret = 1;
 252
 253 err:
 254         if (!pnm) OPENSSL_free(nm);
 255         OPENSSL_free(header);
 256         if (!ret) OPENSSL_free(data);
 257         return ret;
 258         }
 259
 260 #ifndef OPENSSL_NO_FP_API
 261 int PEM_ASN1_write(int (*i2d)(), const char *name, FILE *fp, char *x,
 262              const EVP_CIPHER *enc, unsigned char *kstr, int klen,
 263              pem_password_cb *callback, void *u)
 264         {
 265         BIO *b;
 266         int ret;
 267
 268         if ((b=BIO_new(BIO_s_file())) == NULL)
 269                 {
 270                 PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
 271                 return(0);
 272                 }
 273         BIO_set_fp(b,fp,BIO_NOCLOSE);
 274         ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u);
 275         BIO_free(b);
 276         return(ret);
 277         }
 278 #endif
 279
 280 int PEM_ASN1_write_bio(int (*i2d)(), const char *name, BIO *bp, char *x,
 281              const EVP_CIPHER *enc, unsigned char *kstr, int klen,
 282              pem_password_cb *callback, void *u)
 283         {
 284         EVP_CIPHER_CTX ctx;
 285         int dsize=0,i,j,ret=0;
 286         unsigned char *p,*data=NULL;
 287         const char *objstr=NULL;
 288         char buf[PEM_BUFSIZE];
 289         unsigned char key[EVP_MAX_KEY_LENGTH];
 290         unsigned char iv[EVP_MAX_IV_LENGTH];
 291
 292         if (enc != NULL)
 293                 {
 294                 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
 295                 if (objstr == NULL)
 296                         {
 297                         PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
 298                         goto err;
 299                         }
 300                 }
 301
 302         if ((dsize=i2d(x,NULL)) < 0)
 303                 {
 304                 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
 305                 dsize=0;
 306                 goto err;
 307                 }
 308         /* dzise + 8 bytes are needed */
 309         data=(unsigned char *)OPENSSL_malloc((unsigned int)dsize+20);
 310         if (data == NULL)
 311                 {
 312                 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
 313                 goto err;
 314                 }
 315         p=data;
 316         i=i2d(x,&p);
 317
 318         if (enc != NULL)
 319                 {
 320                 if (kstr == NULL)
 321                         {
 322                         if (callback == NULL)
 323                                 klen=PEM_def_callback(buf,PEM_BUFSIZE,1,u);
 324                         else
 325                                 klen=(*callback)(buf,PEM_BUFSIZE,1,u);
 326                         if (klen <= 0)
 327                                 {
 328                                 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
 329                                 goto err;
 330                                 }
 331 #ifdef CHARSET_EBCDIC
 332                         /* Convert the pass phrase from EBCDIC */
 333                         ebcdic2ascii(buf, buf, klen);
 334 #endif
 335                         kstr=(unsigned char *)buf;
 336                         }
 337                 RAND_add(data,i,0);/* put in the RSA key. */
 338                 if (RAND_pseudo_bytes(iv,8) < 0)        /* Generate a salt */
 339                         goto err;
 340                 /* The 'iv' is used as the iv and as a salt.  It is
 341                  * NOT taken from the BytesToKey function */
 342                 EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
 343
 344                 if (kstr == (unsigned char *)buf) memset(buf,0,PEM_BUFSIZE);
 345
 346                 buf[0]='\0';
 347                 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
 348                 PEM_dek_info(buf,objstr,8,(char *)iv);
 349                 /* k=strlen(buf); */
 350
 351                 EVP_CIPHER_CTX_init(&ctx);
 352                 EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv);
 353                 EVP_EncryptUpdate(&ctx,data,&j,data,i);
 354                 EVP_EncryptFinal_ex(&ctx,&(data[j]),&i);
 355                 EVP_CIPHER_CTX_cleanup(&ctx);
 356                 i+=j;
 357                 ret=1;
 358                 }
 359         else
 360                 {
 361                 ret=1;
 362                 buf[0]='\0';
 363                 }
 364         i=PEM_write_bio(bp,name,buf,data,i);
 365         if (i <= 0) ret=0;
 366 err:
 367         memset(key,0,sizeof(key));
 368         memset(iv,0,sizeof(iv));
 369         memset((char *)&ctx,0,sizeof(ctx));
 370         memset(buf,0,PEM_BUFSIZE);
 371         memset(data,0,(unsigned int)dsize);
 372         OPENSSL_free(data);
 373         return(ret);
 374         }
 375
 376 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
 377              pem_password_cb *callback,void *u)
 378         {
 379         int i,j,o,klen;
 380         long len;
 381         EVP_CIPHER_CTX ctx;
 382         unsigned char key[EVP_MAX_KEY_LENGTH];
 383         char buf[PEM_BUFSIZE];
 384
 385         len= *plen;
 386
 387         if (cipher->cipher == NULL) return(1);
 388         if (callback == NULL)
 389                 klen=PEM_def_callback(buf,PEM_BUFSIZE,0,u);
 390         else
 391                 klen=callback(buf,PEM_BUFSIZE,0,u);
 392         if (klen <= 0)
 393                 {
 394                 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
 395                 return(0);
 396                 }
 397 #ifdef CHARSET_EBCDIC
 398         /* Convert the pass phrase from EBCDIC */
 399         ebcdic2ascii(buf, buf, klen);
 400 #endif
 401
 402         EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
 403                 (unsigned char *)buf,klen,1,key,NULL);
 404
 405         j=(int)len;
 406         EVP_CIPHER_CTX_init(&ctx);
 407         EVP_DecryptInit_ex(&ctx,cipher->cipher,NULL, key,&(cipher->iv[0]));
 408         EVP_DecryptUpdate(&ctx,data,&i,data,j);
 409         o=EVP_DecryptFinal_ex(&ctx,&(data[i]),&j);
 410         EVP_CIPHER_CTX_cleanup(&ctx);
 411         memset((char *)buf,0,sizeof(buf));
 412         memset((char *)key,0,sizeof(key));
 413         j+=i;
 414         if (!o)
 415                 {
 416                 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
 417                 return(0);
 418                 }
 419         *plen=j;
 420         return(1);
 421         }
 422
 423 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
 424         {
 425         int o;
 426         const EVP_CIPHER *enc=NULL;
 427         char *p,c;
 428
 429         cipher->cipher=NULL;
 430         if ((header == NULL) || (*header == '\0') || (*header == '\n'))
 431                 return(1);
 432         if (strncmp(header,"Proc-Type: ",11) != 0)
 433                 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
 434         header+=11;
 435         if (*header != '4') return(0); header++;
 436         if (*header != ',') return(0); header++;
 437         if (strncmp(header,"ENCRYPTED",9) != 0)
 438                 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
 439         for (; (*header != '\n') && (*header != '\0'); header++)
 440                 ;
 441         if (*header == '\0')
 442                 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
 443         header++;
 444         if (strncmp(header,"DEK-Info: ",10) != 0)
 445                 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
 446         header+=10;
 447
 448         p=header;
 449         for (;;)
 450                 {
 451                 c= *header;
 452 #ifndef CHARSET_EBCDIC
 453                 if (!(  ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
 454                         ((c >= '0') && (c <= '9'))))
 455                         break;
 456 #else
 457                 if (!(  isupper(c) || (c == '-') ||
 458                         isdigit(c)))
 459                         break;
 460 #endif
 461                 header++;
 462                 }
 463         *header='\0';
 464         o=OBJ_sn2nid(p);
 465         cipher->cipher=enc=EVP_get_cipherbyname(p);
 466         *header=c;
 467         header++;
 468
 469         if (enc == NULL)
 470                 {
 471                 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
 472                 return(0);
 473                 }
 474         if (!load_iv((unsigned char **)&header,&(cipher->iv[0]),8)) return(0);
 475
 476         return(1);
 477         }
 478
 479 static int load_iv(unsigned char **fromp, unsigned char *to, int num)
 480         {
 481         int v,i;
 482         unsigned char *from;
 483
 484         from= *fromp;
 485         for (i=0; i<num; i++) to[i]=0;
 486         num*=2;
 487         for (i=0; i<num; i++)
 488                 {
 489                 if ((*from >= '0') && (*from <= '9'))
 490                         v= *from-'0';
 491                 else if ((*from >= 'A') && (*from <= 'F'))
 492                         v= *from-'A'+10;
 493                 else if ((*from >= 'a') && (*from <= 'f'))
 494                         v= *from-'a'+10;
 495                 else
 496                         {
 497                         PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
 498                         return(0);
 499                         }
 500                 from++;
 501                 to[i/2]|=v<<(long)((!(i&1))*4);
 502                 }
 503
 504         *fromp=from;
 505         return(1);
 506         }
 507
 508 #ifndef OPENSSL_NO_FP_API
 509 int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,
 510              long len)
 511         {
 512         BIO *b;
 513         int ret;
 514
 515         if ((b=BIO_new(BIO_s_file())) == NULL)
 516                 {
 517                 PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
 518                 return(0);
 519                 }
 520         BIO_set_fp(b,fp,BIO_NOCLOSE);
 521         ret=PEM_write_bio(b, name, header, data,len);
 522         BIO_free(b);
 523         return(ret);
 524         }
 525 #endif
 526
 527 int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
 528              long len)
 529         {
 530         int nlen,n,i,j,outl;
 531         unsigned char *buf;
 532         EVP_ENCODE_CTX ctx;
 533         int reason=ERR_R_BUF_LIB;
 534
 535         EVP_EncodeInit(&ctx);
 536         nlen=strlen(name);
 537
 538         if (    (BIO_write(bp,"-----BEGIN ",11) != 11) ||
 539                 (BIO_write(bp,name,nlen) != nlen) ||
 540                 (BIO_write(bp,"-----\n",6) != 6))
 541                 goto err;
 542
 543         i=strlen(header);
 544         if (i > 0)
 545                 {
 546                 if (    (BIO_write(bp,header,i) != i) ||
 547                         (BIO_write(bp,"\n",1) != 1))
 548                         goto err;
 549                 }
 550
 551         buf=(unsigned char *)OPENSSL_malloc(PEM_BUFSIZE*8);
 552         if (buf == NULL)
 553                 {
 554                 reason=ERR_R_MALLOC_FAILURE;
 555                 goto err;
 556                 }
 557
 558         i=j=0;
 559         while (len > 0)
 560                 {
 561                 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
 562                 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
 563                 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
 564                         goto err;
 565                 i+=outl;
 566                 len-=n;
 567                 j+=n;
 568                 }
 569         EVP_EncodeFinal(&ctx,buf,&outl);
 570         if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
 571         OPENSSL_free(buf);
 572         if (    (BIO_write(bp,"-----END ",9) != 9) ||
 573                 (BIO_write(bp,name,nlen) != nlen) ||
 574                 (BIO_write(bp,"-----\n",6) != 6))
 575                 goto err;
 576         return(i+outl);
 577 err:
 578         PEMerr(PEM_F_PEM_WRITE_BIO,reason);
 579         return(0);
 580         }
 581
 582 #ifndef OPENSSL_NO_FP_API
 583 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
 584              long *len)
 585         {
 586         BIO *b;
 587         int ret;
 588
 589         if ((b=BIO_new(BIO_s_file())) == NULL)
 590                 {
 591                 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
 592                 return(0);
 593                 }
 594         BIO_set_fp(b,fp,BIO_NOCLOSE);
 595         ret=PEM_read_bio(b, name, header, data,len);
 596         BIO_free(b);
 597         return(ret);
 598         }
 599 #endif
 600
 601 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
 602              long *len)
 603         {
 604         EVP_ENCODE_CTX ctx;
 605         int end=0,i,k,bl=0,hl=0,nohead=0;
 606         char buf[256];
 607         BUF_MEM *nameB;
 608         BUF_MEM *headerB;
 609         BUF_MEM *dataB,*tmpB;
 610
 611         nameB=BUF_MEM_new();
 612         headerB=BUF_MEM_new();
 613         dataB=BUF_MEM_new();
 614         if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
 615                 {
 616                 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
 617                 return(0);
 618                 }
 619
 620         buf[254]='\0';
 621         for (;;)
 622                 {
 623                 i=BIO_gets(bp,buf,254);
 624
 625                 if (i <= 0)
 626                         {
 627                         PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
 628                         goto err;
 629                         }
 630
 631                 while ((i >= 0) && (buf[i] <= ' ')) i--;
 632                 buf[++i]='\n'; buf[++i]='\0';
 633
 634                 if (strncmp(buf,"-----BEGIN ",11) == 0)
 635                         {
 636                         i=strlen(&(buf[11]));
 637
 638                         if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
 639                                 continue;
 640                         if (!BUF_MEM_grow(nameB,i+9))
 641                                 {
 642                                 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
 643                                 goto err;
 644                                 }
 645                         memcpy(nameB->data,&(buf[11]),i-6);
 646                         nameB->data[i-6]='\0';
 647                         break;
 648                         }
 649                 }
 650         hl=0;
 651         if (!BUF_MEM_grow(headerB,256))
 652                 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
 653         headerB->data[0]='\0';
 654         for (;;)
 655                 {
 656                 i=BIO_gets(bp,buf,254);
 657                 if (i <= 0) break;
 658
 659                 while ((i >= 0) && (buf[i] <= ' ')) i--;
 660                 buf[++i]='\n'; buf[++i]='\0';
 661
 662                 if (buf[0] == '\n') break;
 663                 if (!BUF_MEM_grow(headerB,hl+i+9))
 664                         { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
 665                 if (strncmp(buf,"-----END ",9) == 0)
 666                         {
 667                         nohead=1;
 668                         break;
 669                         }
 670                 memcpy(&(headerB->data[hl]),buf,i);
 671                 headerB->data[hl+i]='\0';
 672                 hl+=i;
 673                 }
 674
 675         bl=0;
 676         if (!BUF_MEM_grow(dataB,1024))
 677                 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
 678         dataB->data[0]='\0';
 679         if (!nohead)
 680                 {
 681                 for (;;)
 682                         {
 683                         i=BIO_gets(bp,buf,254);
 684                         if (i <= 0) break;
 685
 686                         while ((i >= 0) && (buf[i] <= ' ')) i--;
 687                         buf[++i]='\n'; buf[++i]='\0';
 688
 689                         if (i != 65) end=1;
 690                         if (strncmp(buf,"-----END ",9) == 0)
 691                                 break;
 692                         if (i > 65) break;
 693                         if (!BUF_MEM_grow(dataB,i+bl+9))
 694                                 {
 695                                 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
 696                                 goto err;
 697                                 }
 698                         memcpy(&(dataB->data[bl]),buf,i);
 699                         dataB->data[bl+i]='\0';
 700                         bl+=i;
 701                         if (end)
 702                                 {
 703                                 buf[0]='\0';
 704                                 i=BIO_gets(bp,buf,254);
 705                                 if (i <= 0) break;
 706
 707                                 while ((i >= 0) && (buf[i] <= ' ')) i--;
 708                                 buf[++i]='\n'; buf[++i]='\0';
 709
 710                                 break;
 711                                 }
 712                         }
 713                 }
 714         else
 715                 {
 716                 tmpB=headerB;
 717                 headerB=dataB;
 718                 dataB=tmpB;
 719                 bl=hl;
 720                 }
 721         i=strlen(nameB->data);
 722         if (    (strncmp(buf,"-----END ",9) != 0) ||
 723                 (strncmp(nameB->data,&(buf[9]),i) != 0) ||
 724                 (strncmp(&(buf[9+i]),"-----\n",6) != 0))
 725                 {
 726                 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
 727                 goto err;
 728                 }
 729
 730         EVP_DecodeInit(&ctx);
 731         i=EVP_DecodeUpdate(&ctx,
 732                 (unsigned char *)dataB->data,&bl,
 733                 (unsigned char *)dataB->data,bl);
 734         if (i < 0)
 735                 {
 736                 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
 737                 goto err;
 738                 }
 739         i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
 740         if (i < 0)
 741                 {
 742                 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
 743                 goto err;
 744                 }
 745         bl+=k;
 746
 747         if (bl == 0) goto err;
 748         *name=nameB->data;
 749         *header=headerB->data;
 750         *data=(unsigned char *)dataB->data;
 751         *len=bl;
 752         OPENSSL_free(nameB);
 753         OPENSSL_free(headerB);
 754         OPENSSL_free(dataB);
 755         return(1);
 756 err:
 757         BUF_MEM_free(nameB);
 758         BUF_MEM_free(headerB);
 759         BUF_MEM_free(dataB);
 760         return(0);
 761         }