Cryptlib/OpenSSL/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(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_PEM_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_PEM_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 void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
 162                     pem_password_cb *cb, void *u)
 163         {
 164         BIO *b;
 165         void *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         if(!strcmp(nm,PEM_STRING_ECPRIVATEKEY) &&
 199                  !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
 200         /* Permit older strings */
 201
 202         if(!strcmp(nm,PEM_STRING_X509_OLD) &&
 203                 !strcmp(name,PEM_STRING_X509)) return 1;
 204
 205         if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) &&
 206                 !strcmp(name,PEM_STRING_X509_REQ)) return 1;
 207
 208         /* Allow normal certs to be read as trusted certs */
 209         if(!strcmp(nm,PEM_STRING_X509) &&
 210                 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
 211
 212         if(!strcmp(nm,PEM_STRING_X509_OLD) &&
 213                 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
 214
 215         /* Some CAs use PKCS#7 with CERTIFICATE headers */
 216         if(!strcmp(nm, PEM_STRING_X509) &&
 217                 !strcmp(name, PEM_STRING_PKCS7)) return 1;
 218
 219         if(!strcmp(nm, PEM_STRING_PKCS7_SIGNED) &&
 220                 !strcmp(name, PEM_STRING_PKCS7)) return 1;
 221
 222         return 0;
 223 }
 224
 225 int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, const char *name, BIO *bp,
 226              pem_password_cb *cb, void *u)
 227         {
 228         EVP_CIPHER_INFO cipher;
 229         char *nm=NULL,*header=NULL;
 230         unsigned char *data=NULL;
 231         long len;
 232         int ret = 0;
 233
 234         for (;;)
 235                 {
 236                 if (!PEM_read_bio(bp,&nm,&header,&data,&len)) {
 237                         if(ERR_GET_REASON(ERR_peek_error()) ==
 238                                 PEM_R_NO_START_LINE)
 239                                 ERR_add_error_data(2, "Expecting: ", name);
 240                         return 0;
 241                 }
 242                 if(check_pem(nm, name)) break;
 243                 OPENSSL_free(nm);
 244                 OPENSSL_free(header);
 245                 OPENSSL_free(data);
 246                 }
 247         if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
 248         if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err;
 249
 250         *pdata = data;
 251         *plen = len;
 252
 253         if (pnm)
 254                 *pnm = nm;
 255
 256         ret = 1;
 257
 258 err:
 259         if (!ret || !pnm) OPENSSL_free(nm);
 260         OPENSSL_free(header);
 261         if (!ret) OPENSSL_free(data);
 262         return ret;
 263         }
 264
 265 #ifndef OPENSSL_NO_FP_API
 266 int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
 267                    char *x, const EVP_CIPHER *enc, unsigned char *kstr,
 268                    int klen, pem_password_cb *callback, void *u)
 269         {
 270         BIO *b;
 271         int ret;
 272
 273         if ((b=BIO_new(BIO_s_file())) == NULL)
 274                 {
 275                 PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
 276                 return(0);
 277                 }
 278         BIO_set_fp(b,fp,BIO_NOCLOSE);
 279         ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u);
 280         BIO_free(b);
 281         return(ret);
 282         }
 283 #endif
 284
 285 int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
 286                        char *x, const EVP_CIPHER *enc, unsigned char *kstr,
 287                        int klen, pem_password_cb *callback, void *u)
 288         {
 289         EVP_CIPHER_CTX ctx;
 290         int dsize=0,i,j,ret=0;
 291         unsigned char *p,*data=NULL;
 292         const char *objstr=NULL;
 293         char buf[PEM_BUFSIZE];
 294         unsigned char key[EVP_MAX_KEY_LENGTH];
 295         unsigned char iv[EVP_MAX_IV_LENGTH];
 296
 297         if (enc != NULL)
 298                 {
 299                 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
 300                 if (objstr == NULL)
 301                         {
 302                         PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
 303                         goto err;
 304                         }
 305                 }
 306
 307         if ((dsize=i2d(x,NULL)) < 0)
 308                 {
 309                 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_ASN1_LIB);
 310                 dsize=0;
 311                 goto err;
 312                 }
 313         /* dzise + 8 bytes are needed */
 314         /* actually it needs the cipher block size extra... */
 315         data=(unsigned char *)OPENSSL_malloc((unsigned int)dsize+20);
 316         if (data == NULL)
 317                 {
 318                 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
 319                 goto err;
 320                 }
 321         p=data;
 322         i=i2d(x,&p);
 323
 324         if (enc != NULL)
 325                 {
 326                 if (kstr == NULL)
 327                         {
 328                         if (callback == NULL)
 329                                 klen=PEM_def_callback(buf,PEM_BUFSIZE,1,u);
 330                         else
 331                                 klen=(*callback)(buf,PEM_BUFSIZE,1,u);
 332                         if (klen <= 0)
 333                                 {
 334                                 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
 335                                 goto err;
 336                                 }
 337 #ifdef CHARSET_EBCDIC
 338                         /* Convert the pass phrase from EBCDIC */
 339                         ebcdic2ascii(buf, buf, klen);
 340 #endif
 341                         kstr=(unsigned char *)buf;
 342                         }
 343                 RAND_add(data,i,0);/* put in the RSA key. */
 344                 OPENSSL_assert(enc->iv_len <= (int)sizeof(iv));
 345                 if (RAND_pseudo_bytes(iv,enc->iv_len) < 0) /* Generate a salt */
 346                         goto err;
 347                 /* The 'iv' is used as the iv and as a salt.  It is
 348                  * NOT taken from the BytesToKey function */
 349                 EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
 350
 351                 if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZE);
 352
 353                 OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf);
 354
 355                 buf[0]='\0';
 356                 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
 357                 PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);
 358                 /* k=strlen(buf); */
 359
 360                 EVP_CIPHER_CTX_init(&ctx);
 361                 EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv);
 362                 EVP_EncryptUpdate(&ctx,data,&j,data,i);
 363                 EVP_EncryptFinal_ex(&ctx,&(data[j]),&i);
 364                 EVP_CIPHER_CTX_cleanup(&ctx);
 365                 i+=j;
 366                 ret=1;
 367                 }
 368         else
 369                 {
 370                 ret=1;
 371                 buf[0]='\0';
 372                 }
 373         i=PEM_write_bio(bp,name,buf,data,i);
 374         if (i <= 0) ret=0;
 375 err:
 376         OPENSSL_cleanse(key,sizeof(key));
 377         OPENSSL_cleanse(iv,sizeof(iv));
 378         OPENSSL_cleanse((char *)&ctx,sizeof(ctx));
 379         OPENSSL_cleanse(buf,PEM_BUFSIZE);
 380         if (data != NULL)
 381                 {
 382                 OPENSSL_cleanse(data,(unsigned int)dsize);
 383                 OPENSSL_free(data);
 384                 }
 385         return(ret);
 386         }
 387
 388 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
 389              pem_password_cb *callback,void *u)
 390         {
 391         int i,j,o,klen;
 392         long len;
 393         EVP_CIPHER_CTX ctx;
 394         unsigned char key[EVP_MAX_KEY_LENGTH];
 395         char buf[PEM_BUFSIZE];
 396
 397         len= *plen;
 398
 399         if (cipher->cipher == NULL) return(1);
 400         if (callback == NULL)
 401                 klen=PEM_def_callback(buf,PEM_BUFSIZE,0,u);
 402         else
 403                 klen=callback(buf,PEM_BUFSIZE,0,u);
 404         if (klen <= 0)
 405                 {
 406                 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
 407                 return(0);
 408                 }
 409 #ifdef CHARSET_EBCDIC
 410         /* Convert the pass phrase from EBCDIC */
 411         ebcdic2ascii(buf, buf, klen);
 412 #endif
 413
 414         EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
 415                 (unsigned char *)buf,klen,1,key,NULL);
 416
 417         j=(int)len;
 418         EVP_CIPHER_CTX_init(&ctx);
 419         EVP_DecryptInit_ex(&ctx,cipher->cipher,NULL, key,&(cipher->iv[0]));
 420         EVP_DecryptUpdate(&ctx,data,&i,data,j);
 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         j+=i;
 426         if (!o)
 427                 {
 428                 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
 429                 return(0);
 430                 }
 431         *plen=j;
 432         return(1);
 433         }
 434
 435 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
 436         {
 437         const EVP_CIPHER *enc=NULL;
 438         char *p,c;
 439         char **header_pp = &header;
 440
 441         cipher->cipher=NULL;
 442         if ((header == NULL) || (*header == '\0') || (*header == '\n'))
 443                 return(1);
 444         if (strncmp(header,"Proc-Type: ",11) != 0)
 445                 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
 446         header+=11;
 447         if (*header != '4') return(0); header++;
 448         if (*header != ',') return(0); header++;
 449         if (strncmp(header,"ENCRYPTED",9) != 0)
 450                 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
 451         for (; (*header != '\n') && (*header != '\0'); header++)
 452                 ;
 453         if (*header == '\0')
 454                 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
 455         header++;
 456         if (strncmp(header,"DEK-Info: ",10) != 0)
 457                 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
 458         header+=10;
 459
 460         p=header;
 461         for (;;)
 462                 {
 463                 c= *header;
 464 #ifndef CHARSET_EBCDIC
 465                 if (!(  ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
 466                         ((c >= '0') && (c <= '9'))))
 467                         break;
 468 #else
 469                 if (!(  isupper(c) || (c == '-') ||
 470                         isdigit(c)))
 471                         break;
 472 #endif
 473                 header++;
 474                 }
 475         *header='\0';
 476         cipher->cipher=enc=EVP_get_cipherbyname(p);
 477         *header=c;
 478         header++;
 479
 480         if (enc == NULL)
 481                 {
 482                 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
 483                 return(0);
 484                 }
 485         if (!load_iv(header_pp,&(cipher->iv[0]),enc->iv_len))
 486                 return(0);
 487
 488         return(1);
 489         }
 490
 491 static int load_iv(char **fromp, unsigned char *to, int num)
 492         {
 493         int v,i;
 494         char *from;
 495
 496         from= *fromp;
 497         for (i=0; i<num; i++) to[i]=0;
 498         num*=2;
 499         for (i=0; i<num; i++)
 500                 {
 501                 if ((*from >= '0') && (*from <= '9'))
 502                         v= *from-'0';
 503                 else if ((*from >= 'A') && (*from <= 'F'))
 504                         v= *from-'A'+10;
 505                 else if ((*from >= 'a') && (*from <= 'f'))
 506                         v= *from-'a'+10;
 507                 else
 508                         {
 509                         PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
 510                         return(0);
 511                         }
 512                 from++;
 513                 to[i/2]|=v<<(long)((!(i&1))*4);
 514                 }
 515
 516         *fromp=from;
 517         return(1);
 518         }
 519
 520 #ifndef OPENSSL_NO_FP_API
 521 int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,
 522              long len)
 523         {
 524         BIO *b;
 525         int ret;
 526
 527         if ((b=BIO_new(BIO_s_file())) == NULL)
 528                 {
 529                 PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
 530                 return(0);
 531                 }
 532         BIO_set_fp(b,fp,BIO_NOCLOSE);
 533         ret=PEM_write_bio(b, name, header, data,len);
 534         BIO_free(b);
 535         return(ret);
 536         }
 537 #endif
 538
 539 int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
 540              long len)
 541         {
 542         int nlen,n,i,j,outl;
 543         unsigned char *buf = NULL;
 544         EVP_ENCODE_CTX ctx;
 545         int reason=ERR_R_BUF_LIB;
 546
 547         EVP_EncodeInit(&ctx);
 548         nlen=strlen(name);
 549
 550         if (    (BIO_write(bp,"-----BEGIN ",11) != 11) ||
 551                 (BIO_write(bp,name,nlen) != nlen) ||
 552                 (BIO_write(bp,"-----\n",6) != 6))
 553                 goto err;
 554
 555         i=strlen(header);
 556         if (i > 0)
 557                 {
 558                 if (    (BIO_write(bp,header,i) != i) ||
 559                         (BIO_write(bp,"\n",1) != 1))
 560                         goto err;
 561                 }
 562
 563         buf = OPENSSL_malloc(PEM_BUFSIZE*8);
 564         if (buf == NULL)
 565                 {
 566                 reason=ERR_R_MALLOC_FAILURE;
 567                 goto err;
 568                 }
 569
 570         i=j=0;
 571         while (len > 0)
 572                 {
 573                 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
 574                 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
 575                 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
 576                         goto err;
 577                 i+=outl;
 578                 len-=n;
 579                 j+=n;
 580                 }
 581         EVP_EncodeFinal(&ctx,buf,&outl);
 582         if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
 583         OPENSSL_cleanse(buf, PEM_BUFSIZE*8);
 584         OPENSSL_free(buf);
 585         buf = NULL;
 586         if (    (BIO_write(bp,"-----END ",9) != 9) ||
 587                 (BIO_write(bp,name,nlen) != nlen) ||
 588                 (BIO_write(bp,"-----\n",6) != 6))
 589                 goto err;
 590         return(i+outl);
 591 err:
 592         if (buf) {
 593                 OPENSSL_cleanse(buf, PEM_BUFSIZE*8);
 594                 OPENSSL_free(buf);
 595         }
 596         PEMerr(PEM_F_PEM_WRITE_BIO,reason);
 597         return(0);
 598         }
 599
 600 #ifndef OPENSSL_NO_FP_API
 601 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
 602              long *len)
 603         {
 604         BIO *b;
 605         int ret;
 606
 607         if ((b=BIO_new(BIO_s_file())) == NULL)
 608                 {
 609                 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
 610                 return(0);
 611                 }
 612         BIO_set_fp(b,fp,BIO_NOCLOSE);
 613         ret=PEM_read_bio(b, name, header, data,len);
 614         BIO_free(b);
 615         return(ret);
 616         }
 617 #endif
 618
 619 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
 620              long *len)
 621         {
 622         EVP_ENCODE_CTX ctx;
 623         int end=0,i,k,bl=0,hl=0,nohead=0;
 624         char buf[256];
 625         BUF_MEM *nameB;
 626         BUF_MEM *headerB;
 627         BUF_MEM *dataB,*tmpB;
 628
 629         nameB=BUF_MEM_new();
 630         headerB=BUF_MEM_new();
 631         dataB=BUF_MEM_new();
 632         if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
 633                 {
 634                 BUF_MEM_free(nameB);
 635                 BUF_MEM_free(headerB);
 636                 BUF_MEM_free(dataB);
 637                 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
 638                 return(0);
 639                 }
 640
 641         buf[254]='\0';
 642         for (;;)
 643                 {
 644                 i=BIO_gets(bp,buf,254);
 645
 646                 if (i <= 0)
 647                         {
 648                         PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
 649                         goto err;
 650                         }
 651
 652                 while ((i >= 0) && (buf[i] <= ' ')) i--;
 653                 buf[++i]='\n'; buf[++i]='\0';
 654
 655                 if (strncmp(buf,"-----BEGIN ",11) == 0)
 656                         {
 657                         i=strlen(&(buf[11]));
 658
 659                         if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
 660                                 continue;
 661                         if (!BUF_MEM_grow(nameB,i+9))
 662                                 {
 663                                 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
 664                                 goto err;
 665                                 }
 666                         memcpy(nameB->data,&(buf[11]),i-6);
 667                         nameB->data[i-6]='\0';
 668                         break;
 669                         }
 670                 }
 671         hl=0;
 672         if (!BUF_MEM_grow(headerB,256))
 673                 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
 674         headerB->data[0]='\0';
 675         for (;;)
 676                 {
 677                 i=BIO_gets(bp,buf,254);
 678                 if (i <= 0) break;
 679
 680                 while ((i >= 0) && (buf[i] <= ' ')) i--;
 681                 buf[++i]='\n'; buf[++i]='\0';
 682
 683                 if (buf[0] == '\n') break;
 684                 if (!BUF_MEM_grow(headerB,hl+i+9))
 685                         { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
 686                 if (strncmp(buf,"-----END ",9) == 0)
 687                         {
 688                         nohead=1;
 689                         break;
 690                         }
 691                 memcpy(&(headerB->data[hl]),buf,i);
 692                 headerB->data[hl+i]='\0';
 693                 hl+=i;
 694                 }
 695
 696         bl=0;
 697         if (!BUF_MEM_grow(dataB,1024))
 698                 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
 699         dataB->data[0]='\0';
 700         if (!nohead)
 701                 {
 702                 for (;;)
 703                         {
 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                         if (i != 65) end=1;
 711                         if (strncmp(buf,"-----END ",9) == 0)
 712                                 break;
 713                         if (i > 65) break;
 714                         if (!BUF_MEM_grow_clean(dataB,i+bl+9))
 715                                 {
 716                                 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
 717                                 goto err;
 718                                 }
 719                         memcpy(&(dataB->data[bl]),buf,i);
 720                         dataB->data[bl+i]='\0';
 721                         bl+=i;
 722                         if (end)
 723                                 {
 724                                 buf[0]='\0';
 725                                 i=BIO_gets(bp,buf,254);
 726                                 if (i <= 0) break;
 727
 728                                 while ((i >= 0) && (buf[i] <= ' ')) i--;
 729                                 buf[++i]='\n'; buf[++i]='\0';
 730
 731                                 break;
 732                                 }
 733                         }
 734                 }
 735         else
 736                 {
 737                 tmpB=headerB;
 738                 headerB=dataB;
 739                 dataB=tmpB;
 740                 bl=hl;
 741                 }
 742         i=strlen(nameB->data);
 743         if (    (strncmp(buf,"-----END ",9) != 0) ||
 744                 (strncmp(nameB->data,&(buf[9]),i) != 0) ||
 745                 (strncmp(&(buf[9+i]),"-----\n",6) != 0))
 746                 {
 747                 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
 748                 goto err;
 749                 }
 750
 751         EVP_DecodeInit(&ctx);
 752         i=EVP_DecodeUpdate(&ctx,
 753                 (unsigned char *)dataB->data,&bl,
 754                 (unsigned char *)dataB->data,bl);
 755         if (i < 0)
 756                 {
 757                 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
 758                 goto err;
 759                 }
 760         i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
 761         if (i < 0)
 762                 {
 763                 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
 764                 goto err;
 765                 }
 766         bl+=k;
 767
 768         if (bl == 0) goto err;
 769         *name=nameB->data;
 770         *header=headerB->data;
 771         *data=(unsigned char *)dataB->data;
 772         *len=bl;
 773         OPENSSL_free(nameB);
 774         OPENSSL_free(headerB);
 775         OPENSSL_free(dataB);
 776         return(1);
 777 err:
 778         BUF_MEM_free(nameB);
 779         BUF_MEM_free(headerB);
 780         BUF_MEM_free(dataB);
 781         return(0);
 782         }