crypto/openssl-0.9.7d/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         BUF_strlcat(buf,"Proc-Type: 4,",PEM_BUFSIZE);
 135         BUF_strlcat(buf,str,PEM_BUFSIZE);
 136         BUF_strlcat(buf,"\n",PEM_BUFSIZE);
 137         }
 138
 139 void PEM_dek_info(char *buf, const char *type, int len, char *str)
 140         {
 141         static const unsigned char map[17]="0123456789ABCDEF";
 142         long i;
 143         int j;
 144
 145         BUF_strlcat(buf,"DEK-Info: ",PEM_BUFSIZE);
 146         BUF_strlcat(buf,type,PEM_BUFSIZE);
 147         BUF_strlcat(buf,",",PEM_BUFSIZE);
 148         j=strlen(buf);
 149         if (j + (len * 2) + 1 > PEM_BUFSIZE)
 150                 return;
 151         for (i=0; i<len; i++)
 152                 {
 153                 buf[j+i*2]  =map[(str[i]>>4)&0x0f];
 154                 buf[j+i*2+1]=map[(str[i]   )&0x0f];
 155                 }
 156         buf[j+i*2]='\n';
 157         buf[j+i*2+1]='\0';
 158         }
 159
 160 #ifndef OPENSSL_NO_FP_API
 161 char *PEM_ASN1_read(char *(*d2i)(), const char *name, FILE *fp, char **x,
 162              pem_password_cb *cb, void *u)
 163         {
 164         BIO *b;
 165         char *ret;
 166
 167         if ((b=BIO_new(BIO_s_file())) == NULL)
 168                 {
 169                 PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
 170                 return(0);
 171                 }
 172         BIO_set_fp(b,fp,BIO_NOCLOSE);
 173         ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u);
 174         BIO_free(b);
 175         return(ret);
 176         }
 177 #endif
 178
 179 static int check_pem(const char *nm, const char *name)
 180 {
 181         /* Normal matching nm and name */
 182         if (!strcmp(nm,name)) return 1;
 183
 184         /* Make PEM_STRING_EVP_PKEY match any private key */
 185
 186         if(!strcmp(nm,PEM_STRING_PKCS8) &&
 187                 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
 188
 189         if(!strcmp(nm,PEM_STRING_PKCS8INF) &&
 190                  !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
 191
 192         if(!strcmp(nm,PEM_STRING_RSA) &&
 193                 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
 194
 195         if(!strcmp(nm,PEM_STRING_DSA) &&
 196                  !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
 197
 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 (!ret || !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         /* actually it needs the cipher block size extra... */
 310         data=(unsigned char *)OPENSSL_malloc((unsigned int)dsize+20);
 311         if (data == NULL)
 312                 {
 313                 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
 314                 goto err;
 315                 }
 316         p=data;
 317         i=i2d(x,&p);
 318
 319         if (enc != NULL)
 320                 {
 321                 if (kstr == NULL)
 322                         {
 323                         if (callback == NULL)
 324                                 klen=PEM_def_callback(buf,PEM_BUFSIZE,1,u);
 325                         else
 326                                 klen=(*callback)(buf,PEM_BUFSIZE,1,u);
 327                         if (klen <= 0)
 328                                 {
 329                                 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
 330                                 goto err;
 331                                 }
 332 #ifdef CHARSET_EBCDIC
 333                         /* Convert the pass phrase from EBCDIC */
 334                         ebcdic2ascii(buf, buf, klen);
 335 #endif
 336                         kstr=(unsigned char *)buf;
 337                         }
 338                 RAND_add(data,i,0);/* put in the RSA key. */
 339                 OPENSSL_assert(enc->iv_len <= sizeof iv);
 340                 if (RAND_pseudo_bytes(iv,enc->iv_len) < 0) /* Generate a salt */
 341                         goto err;
 342                 /* The 'iv' is used as the iv and as a salt.  It is
 343                  * NOT taken from the BytesToKey function */
 344                 EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
 345
 346                 if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZE);
 347
 348                 OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf);
 349
 350                 buf[0]='\0';
 351                 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
 352                 PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);
 353                 /* k=strlen(buf); */
 354
 355                 EVP_CIPHER_CTX_init(&ctx);
 356                 EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv);
 357                 EVP_EncryptUpdate(&ctx,data,&j,data,i);
 358                 EVP_EncryptFinal_ex(&ctx,&(data[j]),&i);
 359                 EVP_CIPHER_CTX_cleanup(&ctx);
 360                 i+=j;
 361                 ret=1;
 362                 }
 363         else
 364                 {
 365                 ret=1;
 366                 buf[0]='\0';
 367                 }
 368         i=PEM_write_bio(bp,name,buf,data,i);
 369         if (i <= 0) ret=0;
 370 err:
 371         OPENSSL_cleanse(key,sizeof(key));
 372         OPENSSL_cleanse(iv,sizeof(iv));
 373         OPENSSL_cleanse((char *)&ctx,sizeof(ctx));
 374         OPENSSL_cleanse(buf,PEM_BUFSIZE);
 375         if (data != NULL)
 376                 {
 377                 OPENSSL_cleanse(data,(unsigned int)dsize);
 378                 OPENSSL_free(data);
 379                 }
 380         return(ret);
 381         }
 382
 383 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
 384              pem_password_cb *callback,void *u)
 385         {
 386         int i,j,o,klen;
 387         long len;
 388         EVP_CIPHER_CTX ctx;
 389         unsigned char key[EVP_MAX_KEY_LENGTH];
 390         char buf[PEM_BUFSIZE];
 391
 392         len= *plen;
 393
 394         if (cipher->cipher == NULL) return(1);
 395         if (callback == NULL)
 396                 klen=PEM_def_callback(buf,PEM_BUFSIZE,0,u);
 397         else
 398                 klen=callback(buf,PEM_BUFSIZE,0,u);
 399         if (klen <= 0)
 400                 {
 401                 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
 402                 return(0);
 403                 }
 404 #ifdef CHARSET_EBCDIC
 405         /* Convert the pass phrase from EBCDIC */
 406         ebcdic2ascii(buf, buf, klen);
 407 #endif
 408
 409         EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
 410                 (unsigned char *)buf,klen,1,key,NULL);
 411
 412         j=(int)len;
 413         EVP_CIPHER_CTX_init(&ctx);
 414         EVP_DecryptInit_ex(&ctx,cipher->cipher,NULL, key,&(cipher->iv[0]));
 415         EVP_DecryptUpdate(&ctx,data,&i,data,j);
 416         o=EVP_DecryptFinal_ex(&ctx,&(data[i]),&j);
 417         EVP_CIPHER_CTX_cleanup(&ctx);
 418         OPENSSL_cleanse((char *)buf,sizeof(buf));
 419         OPENSSL_cleanse((char *)key,sizeof(key));
 420         j+=i;
 421         if (!o)
 422                 {
 423                 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
 424                 return(0);
 425                 }
 426         *plen=j;
 427         return(1);
 428         }
 429
 430 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
 431         {
 432         int o;
 433         const EVP_CIPHER *enc=NULL;
 434         char *p,c;
 435
 436         cipher->cipher=NULL;
 437         if ((header == NULL) || (*header == '\0') || (*header == '\n'))
 438                 return(1);
 439         if (strncmp(header,"Proc-Type: ",11) != 0)
 440                 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
 441         header+=11;
 442         if (*header != '4') return(0); header++;
 443         if (*header != ',') return(0); header++;
 444         if (strncmp(header,"ENCRYPTED",9) != 0)
 445                 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
 446         for (; (*header != '\n') && (*header != '\0'); header++)
 447                 ;
 448         if (*header == '\0')
 449                 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
 450         header++;
 451         if (strncmp(header,"DEK-Info: ",10) != 0)
 452                 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
 453         header+=10;
 454
 455         p=header;
 456         for (;;)
 457                 {
 458                 c= *header;
 459 #ifndef CHARSET_EBCDIC
 460                 if (!(  ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
 461                         ((c >= '0') && (c <= '9'))))
 462                         break;
 463 #else
 464                 if (!(  isupper(c) || (c == '-') ||
 465                         isdigit(c)))
 466                         break;
 467 #endif
 468                 header++;
 469                 }
 470         *header='\0';
 471         o=OBJ_sn2nid(p);
 472         cipher->cipher=enc=EVP_get_cipherbyname(p);
 473         *header=c;
 474         header++;
 475
 476         if (enc == NULL)
 477                 {
 478                 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
 479                 return(0);
 480                 }
 481         if (!load_iv((unsigned char **)&header,&(cipher->iv[0]),enc->iv_len)) return(0);
 482
 483         return(1);
 484         }
 485
 486 static int load_iv(unsigned char **fromp, unsigned char *to, int num)
 487         {
 488         int v,i;
 489         unsigned char *from;
 490
 491         from= *fromp;
 492         for (i=0; i<num; i++) to[i]=0;
 493         num*=2;
 494         for (i=0; i<num; i++)
 495                 {
 496                 if ((*from >= '0') && (*from <= '9'))
 497                         v= *from-'0';
 498                 else if ((*from >= 'A') && (*from <= 'F'))
 499                         v= *from-'A'+10;
 500                 else if ((*from >= 'a') && (*from <= 'f'))
 501                         v= *from-'a'+10;
 502                 else
 503                         {
 504                         PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
 505                         return(0);
 506                         }
 507                 from++;
 508                 to[i/2]|=v<<(long)((!(i&1))*4);
 509                 }
 510
 511         *fromp=from;
 512         return(1);
 513         }
 514
 515 #ifndef OPENSSL_NO_FP_API
 516 int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,
 517              long len)
 518         {
 519         BIO *b;
 520         int ret;
 521
 522         if ((b=BIO_new(BIO_s_file())) == NULL)
 523                 {
 524                 PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
 525                 return(0);
 526                 }
 527         BIO_set_fp(b,fp,BIO_NOCLOSE);
 528         ret=PEM_write_bio(b, name, header, data,len);
 529         BIO_free(b);
 530         return(ret);
 531         }
 532 #endif
 533
 534 int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
 535              long len)
 536         {
 537         int nlen,n,i,j,outl;
 538         unsigned char *buf = NULL;
 539         EVP_ENCODE_CTX ctx;
 540         int reason=ERR_R_BUF_LIB;
 541
 542         EVP_EncodeInit(&ctx);
 543         nlen=strlen(name);
 544
 545         if (    (BIO_write(bp,"-----BEGIN ",11) != 11) ||
 546                 (BIO_write(bp,name,nlen) != nlen) ||
 547                 (BIO_write(bp,"-----\n",6) != 6))
 548                 goto err;
 549
 550         i=strlen(header);
 551         if (i > 0)
 552                 {
 553                 if (    (BIO_write(bp,header,i) != i) ||
 554                         (BIO_write(bp,"\n",1) != 1))
 555                         goto err;
 556                 }
 557
 558         buf = OPENSSL_malloc(PEM_BUFSIZE*8);
 559         if (buf == NULL)
 560                 {
 561                 reason=ERR_R_MALLOC_FAILURE;
 562                 goto err;
 563                 }
 564
 565         i=j=0;
 566         while (len > 0)
 567                 {
 568                 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
 569                 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
 570                 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
 571                         goto err;
 572                 i+=outl;
 573                 len-=n;
 574                 j+=n;
 575                 }
 576         EVP_EncodeFinal(&ctx,buf,&outl);
 577         if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
 578         OPENSSL_free(buf);
 579         buf = NULL;
 580         if (    (BIO_write(bp,"-----END ",9) != 9) ||
 581                 (BIO_write(bp,name,nlen) != nlen) ||
 582                 (BIO_write(bp,"-----\n",6) != 6))
 583                 goto err;
 584         return(i+outl);
 585 err:
 586         if (buf)
 587                 OPENSSL_free(buf);
 588         PEMerr(PEM_F_PEM_WRITE_BIO,reason);
 589         return(0);
 590         }
 591
 592 #ifndef OPENSSL_NO_FP_API
 593 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
 594              long *len)
 595         {
 596         BIO *b;
 597         int ret;
 598
 599         if ((b=BIO_new(BIO_s_file())) == NULL)
 600                 {
 601                 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
 602                 return(0);
 603                 }
 604         BIO_set_fp(b,fp,BIO_NOCLOSE);
 605         ret=PEM_read_bio(b, name, header, data,len);
 606         BIO_free(b);
 607         return(ret);
 608         }
 609 #endif
 610
 611 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
 612              long *len)
 613         {
 614         EVP_ENCODE_CTX ctx;
 615         int end=0,i,k,bl=0,hl=0,nohead=0;
 616         char buf[256];
 617         BUF_MEM *nameB;
 618         BUF_MEM *headerB;
 619         BUF_MEM *dataB,*tmpB;
 620
 621         nameB=BUF_MEM_new();
 622         headerB=BUF_MEM_new();
 623         dataB=BUF_MEM_new();
 624         if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
 625                 {
 626                 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
 627                 return(0);
 628                 }
 629
 630         buf[254]='\0';
 631         for (;;)
 632                 {
 633                 i=BIO_gets(bp,buf,254);
 634
 635                 if (i <= 0)
 636                         {
 637                         PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
 638                         goto err;
 639                         }
 640
 641                 while ((i >= 0) && (buf[i] <= ' ')) i--;
 642                 buf[++i]='\n'; buf[++i]='\0';
 643
 644                 if (strncmp(buf,"-----BEGIN ",11) == 0)
 645                         {
 646                         i=strlen(&(buf[11]));
 647
 648                         if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
 649                                 continue;
 650                         if (!BUF_MEM_grow(nameB,i+9))
 651                                 {
 652                                 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
 653                                 goto err;
 654                                 }
 655                         memcpy(nameB->data,&(buf[11]),i-6);
 656                         nameB->data[i-6]='\0';
 657                         break;
 658                         }
 659                 }
 660         hl=0;
 661         if (!BUF_MEM_grow(headerB,256))
 662                 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
 663         headerB->data[0]='\0';
 664         for (;;)
 665                 {
 666                 i=BIO_gets(bp,buf,254);
 667                 if (i <= 0) break;
 668
 669                 while ((i >= 0) && (buf[i] <= ' ')) i--;
 670                 buf[++i]='\n'; buf[++i]='\0';
 671
 672                 if (buf[0] == '\n') break;
 673                 if (!BUF_MEM_grow(headerB,hl+i+9))
 674                         { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
 675                 if (strncmp(buf,"-----END ",9) == 0)
 676                         {
 677                         nohead=1;
 678                         break;
 679                         }
 680                 memcpy(&(headerB->data[hl]),buf,i);
 681                 headerB->data[hl+i]='\0';
 682                 hl+=i;
 683                 }
 684
 685         bl=0;
 686         if (!BUF_MEM_grow(dataB,1024))
 687                 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
 688         dataB->data[0]='\0';
 689         if (!nohead)
 690                 {
 691                 for (;;)
 692                         {
 693                         i=BIO_gets(bp,buf,254);
 694                         if (i <= 0) break;
 695
 696                         while ((i >= 0) && (buf[i] <= ' ')) i--;
 697                         buf[++i]='\n'; buf[++i]='\0';
 698
 699                         if (i != 65) end=1;
 700                         if (strncmp(buf,"-----END ",9) == 0)
 701                                 break;
 702                         if (i > 65) break;
 703                         if (!BUF_MEM_grow_clean(dataB,i+bl+9))
 704                                 {
 705                                 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
 706                                 goto err;
 707                                 }
 708                         memcpy(&(dataB->data[bl]),buf,i);
 709                         dataB->data[bl+i]='\0';
 710                         bl+=i;
 711                         if (end)
 712                                 {
 713                                 buf[0]='\0';
 714                                 i=BIO_gets(bp,buf,254);
 715                                 if (i <= 0) break;
 716
 717                                 while ((i >= 0) && (buf[i] <= ' ')) i--;
 718                                 buf[++i]='\n'; buf[++i]='\0';
 719
 720                                 break;
 721                                 }
 722                         }
 723                 }
 724         else
 725                 {
 726                 tmpB=headerB;
 727                 headerB=dataB;
 728                 dataB=tmpB;
 729                 bl=hl;
 730                 }
 731         i=strlen(nameB->data);
 732         if (    (strncmp(buf,"-----END ",9) != 0) ||
 733                 (strncmp(nameB->data,&(buf[9]),i) != 0) ||
 734                 (strncmp(&(buf[9+i]),"-----\n",6) != 0))
 735                 {
 736                 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
 737                 goto err;
 738                 }
 739
 740         EVP_DecodeInit(&ctx);
 741         i=EVP_DecodeUpdate(&ctx,
 742                 (unsigned char *)dataB->data,&bl,
 743                 (unsigned char *)dataB->data,bl);
 744         if (i < 0)
 745                 {
 746                 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
 747                 goto err;
 748                 }
 749         i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
 750         if (i < 0)
 751                 {
 752                 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
 753                 goto err;
 754                 }
 755         bl+=k;
 756
 757         if (bl == 0) goto err;
 758         *name=nameB->data;
 759         *header=headerB->data;
 760         *data=(unsigned char *)dataB->data;
 761         *len=bl;
 762         OPENSSL_free(nameB);
 763         OPENSSL_free(headerB);
 764         OPENSSL_free(dataB);
 765         return(1);
 766 err:
 767         BUF_MEM_free(nameB);
 768         BUF_MEM_free(headerB);
 769         BUF_MEM_free(dataB);
 770         return(0);
 771         }