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 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 def_callback(char *buf, int num, int w, void *userdata);
  77 static int load_iv(unsigned char **fromp,unsigned char *to, int num);
  78 static int check_pem(const char *nm, const char *name);
  79
  80 static int def_callback(char *buf, int num, int w, void *userdata)
  81         {
  82 #ifdef NO_FP_API
  83         /* We should not ever call the default callback routine from
  84          * windows. */
  85         PEMerr(PEM_F_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
  86         return(-1);
  87 #else
  88         int i,j;
  89         const char *prompt;
  90
  91         prompt=EVP_get_pw_prompt();
  92         if (prompt == NULL)
  93                 prompt="Enter PEM pass phrase:";
  94
  95         for (;;)
  96                 {
  97                 i=EVP_read_pw_string(buf,num,prompt,w);
  98                 if (i != 0)
  99                         {
 100                         PEMerr(PEM_F_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);
 101                         memset(buf,0,(unsigned int)num);
 102                         return(-1);
 103                         }
 104                 j=strlen(buf);
 105                 if (j < MIN_LENGTH)
 106                         {
 107                         fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);
 108                         }
 109                 else
 110                         break;
 111                 }
 112         return(j);
 113 #endif
 114         }
 115
 116 void PEM_proc_type(char *buf, int type)
 117         {
 118         const char *str;
 119
 120         if (type == PEM_TYPE_ENCRYPTED)
 121                 str="ENCRYPTED";
 122         else if (type == PEM_TYPE_MIC_CLEAR)
 123                 str="MIC-CLEAR";
 124         else if (type == PEM_TYPE_MIC_ONLY)
 125                 str="MIC-ONLY";
 126         else
 127                 str="BAD-TYPE";
 128
 129         strcat(buf,"Proc-Type: 4,");
 130         strcat(buf,str);
 131         strcat(buf,"\n");
 132         }
 133
 134 void PEM_dek_info(char *buf, const char *type, int len, char *str)
 135         {
 136         static unsigned char map[17]="0123456789ABCDEF";
 137         long i;
 138         int j;
 139
 140         strcat(buf,"DEK-Info: ");
 141         strcat(buf,type);
 142         strcat(buf,",");
 143         j=strlen(buf);
 144         for (i=0; i<len; i++)
 145                 {
 146                 buf[j+i*2]  =map[(str[i]>>4)&0x0f];
 147                 buf[j+i*2+1]=map[(str[i]   )&0x0f];
 148                 }
 149         buf[j+i*2]='\n';
 150         buf[j+i*2+1]='\0';
 151         }
 152
 153 #ifndef NO_FP_API
 154 char *PEM_ASN1_read(char *(*d2i)(), const char *name, FILE *fp, char **x,
 155              pem_password_cb *cb, void *u)
 156         {
 157         BIO *b;
 158         char *ret;
 159
 160         if ((b=BIO_new(BIO_s_file())) == NULL)
 161                 {
 162                 PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
 163                 return(0);
 164                 }
 165         BIO_set_fp(b,fp,BIO_NOCLOSE);
 166         ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u);
 167         BIO_free(b);
 168         return(ret);
 169         }
 170 #endif
 171
 172 static int check_pem(const char *nm, const char *name)
 173 {
 174         /* Normal matching nm and name */
 175         if (!strcmp(nm,name)) return 1;
 176
 177         /* Make PEM_STRING_EVP_PKEY match any private key */
 178
 179         if(!strcmp(nm,PEM_STRING_PKCS8) &&
 180                 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
 181
 182         if(!strcmp(nm,PEM_STRING_PKCS8INF) &&
 183                  !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
 184
 185         if(!strcmp(nm,PEM_STRING_RSA) &&
 186                 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
 187
 188         if(!strcmp(nm,PEM_STRING_DSA) &&
 189                  !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
 190
 191         /* Permit older strings */
 192
 193         if(!strcmp(nm,PEM_STRING_X509_OLD) &&
 194                 !strcmp(name,PEM_STRING_X509)) return 1;
 195
 196         if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) &&
 197                 !strcmp(name,PEM_STRING_X509_REQ)) return 1;
 198
 199         /* Allow normal certs to be read as trusted certs */
 200         if(!strcmp(nm,PEM_STRING_X509) &&
 201                 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
 202
 203         if(!strcmp(nm,PEM_STRING_X509_OLD) &&
 204                 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
 205
 206         return 0;
 207 }
 208
 209 char *PEM_ASN1_read_bio(char *(*d2i)(), const char *name, BIO *bp, char **x,
 210              pem_password_cb *cb, void *u)
 211         {
 212         EVP_CIPHER_INFO cipher;
 213         char *nm=NULL,*header=NULL;
 214         unsigned char *p=NULL,*data=NULL;
 215         long len;
 216         char *ret=NULL;
 217
 218         for (;;)
 219                 {
 220                 if (!PEM_read_bio(bp,&nm,&header,&data,&len)) {
 221                         if(ERR_GET_REASON(ERR_peek_error()) ==
 222                                 PEM_R_NO_START_LINE)
 223                                 ERR_add_error_data(2, "Expecting: ", name);
 224                         return(NULL);
 225                 }
 226                 if(check_pem(nm, name)) break;
 227                 Free(nm);
 228                 Free(header);
 229                 Free(data);
 230                 }
 231         if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
 232         if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err;
 233         p=data;
 234         if (strcmp(name,PEM_STRING_EVP_PKEY) == 0) {
 235                 if (strcmp(nm,PEM_STRING_RSA) == 0)
 236                         ret=d2i(EVP_PKEY_RSA,x,&p,len);
 237                 else if (strcmp(nm,PEM_STRING_DSA) == 0)
 238                         ret=d2i(EVP_PKEY_DSA,x,&p,len);
 239                 else if (strcmp(nm,PEM_STRING_PKCS8INF) == 0) {
 240                         PKCS8_PRIV_KEY_INFO *p8inf;
 241                         p8inf=d2i_PKCS8_PRIV_KEY_INFO(
 242                                         (PKCS8_PRIV_KEY_INFO **) x, &p, len);
 243                         ret = (char *)EVP_PKCS82PKEY(p8inf);
 244                         PKCS8_PRIV_KEY_INFO_free(p8inf);
 245                 } else if (strcmp(nm,PEM_STRING_PKCS8) == 0) {
 246                         PKCS8_PRIV_KEY_INFO *p8inf;
 247                         X509_SIG *p8;
 248                         int klen;
 249                         char psbuf[PEM_BUFSIZE];
 250                         p8 = d2i_X509_SIG((X509_SIG **)x, &p, len);
 251                         if(!p8) goto p8err;
 252                         if (cb) klen=cb(psbuf,PEM_BUFSIZE,0,u);
 253                         else klen=def_callback(psbuf,PEM_BUFSIZE,0,u);
 254                         if (klen <= 0) {
 255                                 PEMerr(PEM_F_PEM_ASN1_READ_BIO,
 256                                                 PEM_R_BAD_PASSWORD_READ);
 257                                 goto err;
 258                         }
 259                         p8inf = M_PKCS8_decrypt(p8, psbuf, klen);
 260                         X509_SIG_free(p8);
 261                         if(!p8inf) goto p8err;
 262                         ret = (char *)EVP_PKCS82PKEY(p8inf);
 263                         PKCS8_PRIV_KEY_INFO_free(p8inf);
 264                 }
 265         } else  ret=d2i(x,&p,len);
 266 p8err:
 267         if (ret == NULL)
 268                 PEMerr(PEM_F_PEM_ASN1_READ_BIO,ERR_R_ASN1_LIB);
 269 err:
 270         Free(nm);
 271         Free(header);
 272         Free(data);
 273         return(ret);
 274         }
 275
 276 #ifndef NO_FP_API
 277 int PEM_ASN1_write(int (*i2d)(), const char *name, FILE *fp, char *x,
 278              const EVP_CIPHER *enc, unsigned char *kstr, int klen,
 279              pem_password_cb *callback, void *u)
 280         {
 281         BIO *b;
 282         int ret;
 283
 284         if ((b=BIO_new(BIO_s_file())) == NULL)
 285                 {
 286                 PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
 287                 return(0);
 288                 }
 289         BIO_set_fp(b,fp,BIO_NOCLOSE);
 290         ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u);
 291         BIO_free(b);
 292         return(ret);
 293         }
 294 #endif
 295
 296 int PEM_ASN1_write_bio(int (*i2d)(), const char *name, BIO *bp, char *x,
 297              const EVP_CIPHER *enc, unsigned char *kstr, int klen,
 298              pem_password_cb *callback, void *u)
 299         {
 300         EVP_CIPHER_CTX ctx;
 301         int dsize=0,i,j,ret=0;
 302         unsigned char *p,*data=NULL;
 303         const char *objstr=NULL;
 304         char buf[PEM_BUFSIZE];
 305         unsigned char key[EVP_MAX_KEY_LENGTH];
 306         unsigned char iv[EVP_MAX_IV_LENGTH];
 307
 308         if (enc != NULL)
 309                 {
 310                 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
 311                 if (objstr == NULL)
 312                         {
 313                         PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
 314                         goto err;
 315                         }
 316                 }
 317
 318         if ((dsize=i2d(x,NULL)) < 0)
 319                 {
 320                 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
 321                 dsize=0;
 322                 goto err;
 323                 }
 324         /* dzise + 8 bytes are needed */
 325         data=(unsigned char *)Malloc((unsigned int)dsize+20);
 326         if (data == NULL)
 327                 {
 328                 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
 329                 goto err;
 330                 }
 331         p=data;
 332         i=i2d(x,&p);
 333
 334         if (enc != NULL)
 335                 {
 336                 if (kstr == NULL)
 337                         {
 338                         if (callback == NULL)
 339                                 klen=def_callback(buf,PEM_BUFSIZE,1,u);
 340                         else
 341                                 klen=(*callback)(buf,PEM_BUFSIZE,1,u);
 342                         if (klen <= 0)
 343                                 {
 344                                 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
 345                                 goto err;
 346                                 }
 347 #ifdef CHARSET_EBCDIC
 348                         /* Convert the pass phrase from EBCDIC */
 349                         ebcdic2ascii(buf, buf, klen);
 350 #endif
 351                         kstr=(unsigned char *)buf;
 352                         }
 353                 RAND_seed(data,i);/* put in the RSA key. */
 354                 RAND_bytes(iv,8);       /* Generate a salt */
 355                 /* The 'iv' is used as the iv and as a salt.  It is
 356                  * NOT taken from the BytesToKey function */
 357                 EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
 358
 359                 if (kstr == (unsigned char *)buf) memset(buf,0,PEM_BUFSIZE);
 360
 361                 buf[0]='\0';
 362                 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
 363                 PEM_dek_info(buf,objstr,8,(char *)iv);
 364                 /* k=strlen(buf); */
 365
 366                 EVP_EncryptInit(&ctx,enc,key,iv);
 367                 EVP_EncryptUpdate(&ctx,data,&j,data,i);
 368                 EVP_EncryptFinal(&ctx,&(data[j]),&i);
 369                 i+=j;
 370                 ret=1;
 371                 }
 372         else
 373                 {
 374                 ret=1;
 375                 buf[0]='\0';
 376                 }
 377         i=PEM_write_bio(bp,name,buf,data,i);
 378         if (i <= 0) ret=0;
 379 err:
 380         memset(key,0,sizeof(key));
 381         memset(iv,0,sizeof(iv));
 382         memset((char *)&ctx,0,sizeof(ctx));
 383         memset(buf,0,PEM_BUFSIZE);
 384         memset(data,0,(unsigned int)dsize);
 385         Free(data);
 386         return(ret);
 387         }
 388
 389 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
 390              pem_password_cb *callback,void *u)
 391         {
 392         int i,j,o,klen;
 393         long len;
 394         EVP_CIPHER_CTX ctx;
 395         unsigned char key[EVP_MAX_KEY_LENGTH];
 396         char buf[PEM_BUFSIZE];
 397
 398         len= *plen;
 399
 400         if (cipher->cipher == NULL) return(1);
 401         if (callback == NULL)
 402                 klen=def_callback(buf,PEM_BUFSIZE,0,u);
 403         else
 404                 klen=callback(buf,PEM_BUFSIZE,0,u);
 405         if (klen <= 0)
 406                 {
 407                 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
 408                 return(0);
 409                 }
 410 #ifdef CHARSET_EBCDIC
 411         /* Convert the pass phrase from EBCDIC */
 412         ebcdic2ascii(buf, buf, klen);
 413 #endif
 414
 415         EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
 416                 (unsigned char *)buf,klen,1,key,NULL);
 417
 418         j=(int)len;
 419         EVP_DecryptInit(&ctx,cipher->cipher,key,&(cipher->iv[0]));
 420         EVP_DecryptUpdate(&ctx,data,&i,data,j);
 421         o=EVP_DecryptFinal(&ctx,&(data[i]),&j);
 422         EVP_CIPHER_CTX_cleanup(&ctx);
 423         memset((char *)buf,0,sizeof(buf));
 424         memset((char *)key,0,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         int o;
 438         const EVP_CIPHER *enc=NULL;
 439         char *p,c;
 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         o=OBJ_sn2nid(p);
 477         cipher->cipher=enc=EVP_get_cipherbyname(p);
 478         *header=c;
 479         header++;
 480
 481         if (enc == NULL)
 482                 {
 483                 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
 484                 return(0);
 485                 }
 486         if (!load_iv((unsigned char **)&header,&(cipher->iv[0]),8)) return(0);
 487
 488         return(1);
 489         }
 490
 491 static int load_iv(unsigned char **fromp, unsigned char *to, int num)
 492         {
 493         int v,i;
 494         unsigned 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 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;
 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=(unsigned char *)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         Free(buf);
 584         if (    (BIO_write(bp,"-----END ",9) != 9) ||
 585                 (BIO_write(bp,name,nlen) != nlen) ||
 586                 (BIO_write(bp,"-----\n",6) != 6))
 587                 goto err;
 588         return(i+outl);
 589 err:
 590         PEMerr(PEM_F_PEM_WRITE_BIO,reason);
 591         return(0);
 592         }
 593
 594 #ifndef NO_FP_API
 595 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
 596              long *len)
 597         {
 598         BIO *b;
 599         int ret;
 600
 601         if ((b=BIO_new(BIO_s_file())) == NULL)
 602                 {
 603                 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
 604                 return(0);
 605                 }
 606         BIO_set_fp(b,fp,BIO_NOCLOSE);
 607         ret=PEM_read_bio(b, name, header, data,len);
 608         BIO_free(b);
 609         return(ret);
 610         }
 611 #endif
 612
 613 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
 614              long *len)
 615         {
 616         EVP_ENCODE_CTX ctx;
 617         int end=0,i,k,bl=0,hl=0,nohead=0;
 618         char buf[256];
 619         BUF_MEM *nameB;
 620         BUF_MEM *headerB;
 621         BUF_MEM *dataB,*tmpB;
 622
 623         nameB=BUF_MEM_new();
 624         headerB=BUF_MEM_new();
 625         dataB=BUF_MEM_new();
 626         if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
 627                 {
 628                 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
 629                 return(0);
 630                 }
 631
 632         buf[254]='\0';
 633         for (;;)
 634                 {
 635                 i=BIO_gets(bp,buf,254);
 636
 637                 if (i <= 0)
 638                         {
 639                         PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
 640                         goto err;
 641                         }
 642
 643                 while ((i >= 0) && (buf[i] <= ' ')) i--;
 644                 buf[++i]='\n'; buf[++i]='\0';
 645
 646                 if (strncmp(buf,"-----BEGIN ",11) == 0)
 647                         {
 648                         i=strlen(&(buf[11]));
 649
 650                         if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
 651                                 continue;
 652                         if (!BUF_MEM_grow(nameB,i+9))
 653                                 {
 654                                 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
 655                                 goto err;
 656                                 }
 657                         memcpy(nameB->data,&(buf[11]),i-6);
 658                         nameB->data[i-6]='\0';
 659                         break;
 660                         }
 661                 }
 662         hl=0;
 663         if (!BUF_MEM_grow(headerB,256))
 664                 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
 665         headerB->data[0]='\0';
 666         for (;;)
 667                 {
 668                 i=BIO_gets(bp,buf,254);
 669                 if (i <= 0) break;
 670
 671                 while ((i >= 0) && (buf[i] <= ' ')) i--;
 672                 buf[++i]='\n'; buf[++i]='\0';
 673
 674                 if (buf[0] == '\n') break;
 675                 if (!BUF_MEM_grow(headerB,hl+i+9))
 676                         { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
 677                 if (strncmp(buf,"-----END ",9) == 0)
 678                         {
 679                         nohead=1;
 680                         break;
 681                         }
 682                 memcpy(&(headerB->data[hl]),buf,i);
 683                 headerB->data[hl+i]='\0';
 684                 hl+=i;
 685                 }
 686
 687         bl=0;
 688         if (!BUF_MEM_grow(dataB,1024))
 689                 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
 690         dataB->data[0]='\0';
 691         if (!nohead)
 692                 {
 693                 for (;;)
 694                         {
 695                         i=BIO_gets(bp,buf,254);
 696                         if (i <= 0) break;
 697
 698                         while ((i >= 0) && (buf[i] <= ' ')) i--;
 699                         buf[++i]='\n'; buf[++i]='\0';
 700
 701                         if (i != 65) end=1;
 702                         if (strncmp(buf,"-----END ",9) == 0)
 703                                 break;
 704                         if (i > 65) break;
 705                         if (!BUF_MEM_grow(dataB,i+bl+9))
 706                                 {
 707                                 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
 708                                 goto err;
 709                                 }
 710                         memcpy(&(dataB->data[bl]),buf,i);
 711                         dataB->data[bl+i]='\0';
 712                         bl+=i;
 713                         if (end)
 714                                 {
 715                                 buf[0]='\0';
 716                                 i=BIO_gets(bp,buf,254);
 717                                 if (i <= 0) break;
 718
 719                                 while ((i >= 0) && (buf[i] <= ' ')) i--;
 720                                 buf[++i]='\n'; buf[++i]='\0';
 721
 722                                 break;
 723                                 }
 724                         }
 725                 }
 726         else
 727                 {
 728                 tmpB=headerB;
 729                 headerB=dataB;
 730                 dataB=tmpB;
 731                 bl=hl;
 732                 }
 733         i=strlen(nameB->data);
 734         if (    (strncmp(buf,"-----END ",9) != 0) ||
 735                 (strncmp(nameB->data,&(buf[9]),i) != 0) ||
 736                 (strncmp(&(buf[9+i]),"-----\n",6) != 0))
 737                 {
 738                 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
 739                 goto err;
 740                 }
 741
 742         EVP_DecodeInit(&ctx);
 743         i=EVP_DecodeUpdate(&ctx,
 744                 (unsigned char *)dataB->data,&bl,
 745                 (unsigned char *)dataB->data,bl);
 746         if (i < 0)
 747                 {
 748                 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
 749                 goto err;
 750                 }
 751         i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
 752         if (i < 0)
 753                 {
 754                 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
 755                 goto err;
 756                 }
 757         bl+=k;
 758
 759         if (bl == 0) goto err;
 760         *name=nameB->data;
 761         *header=headerB->data;
 762         *data=(unsigned char *)dataB->data;
 763         *len=bl;
 764         Free(nameB);
 765         Free(headerB);
 766         Free(dataB);
 767         return(1);
 768 err:
 769         BUF_MEM_free(nameB);
 770         BUF_MEM_free(headerB);
 771         BUF_MEM_free(dataB);
 772         return(0);
 773         }
 774
 775 /* This function writes a private key in PKCS#8 format: it is a "drop in"
 776  * replacement for PEM_write_bio_PrivateKey(). As usual if 'enc' is NULL then
 777  * it uses the unencrypted private key form. It uses PKCS#5 v2.0 password based
 778  * encryption algorithms.
 779  */
 780
 781 int PEM_write_bio_PKCS8PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
 782                                   char *kstr, int klen,
 783                                   pem_password_cb *cb, void *u)
 784 {
 785         X509_SIG *p8;
 786         PKCS8_PRIV_KEY_INFO *p8inf;
 787         char buf[PEM_BUFSIZE];
 788         int ret;
 789         if(!(p8inf = EVP_PKEY2PKCS8(x))) {
 790                 PEMerr(PEM_F_PEM_WRITE_BIO_PKCS8PRIVATEKEY,
 791                                         PEM_R_ERROR_CONVERTING_PRIVATE_KEY);
 792                 return 0;
 793         }
 794         if(enc) {
 795                 if(!kstr) {
 796                         if(!cb) klen = def_callback(buf, PEM_BUFSIZE, 1, u);
 797                         else klen = cb(buf, PEM_BUFSIZE, 1, u);
 798                         if(klen <= 0) {
 799                                 PEMerr(PEM_F_PEM_WRITE_BIO_PKCS8PRIVATEKEY,
 800                                                                 PEM_R_READ_KEY);
 801                                 PKCS8_PRIV_KEY_INFO_free(p8inf);
 802                                 return 0;
 803                         }
 804
 805                         kstr = buf;
 806                 }
 807                 p8 = PKCS8_encrypt(-1, enc, kstr, klen, NULL, 0, 0, p8inf);
 808                 if(kstr == buf) memset(buf, 0, klen);
 809                 PKCS8_PRIV_KEY_INFO_free(p8inf);
 810                 ret = PEM_write_bio_PKCS8(bp, p8);
 811                 X509_SIG_free(p8);
 812                 return ret;
 813         } else {
 814                 ret = PEM_write_bio_PKCS8_PRIV_KEY_INFO(bp, p8inf);
 815                 PKCS8_PRIV_KEY_INFO_free(p8inf);
 816                 return ret;
 817         }
 818 }
 819
 820 int PEM_write_PKCS8PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
 821                               char *kstr, int klen, pem_password_cb *cb, void *u)
 822 {
 823         BIO *bp;
 824         int ret;
 825         if(!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {
 826                 PEMerr(PEM_F_PEM_F_PEM_WRITE_PKCS8PRIVATEKEY,ERR_R_BUF_LIB);
 827                 return(0);
 828         }
 829         ret = PEM_write_bio_PKCS8PrivateKey(bp, x, enc, kstr, klen, cb, u);
 830         BIO_free(bp);
 831         return ret;
 832 }