1 /* crypto/pem/pem_lib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
71 char *PEM_version="PEM" OPENSSL_VERSION_PTEXT;
75 /* PEMerr(PEM_F_PEM_WRITE_BIO,ERR_R_MALLOC_FAILURE);
76 * PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
80 static int def_callback(char *buf, int num, int w);
81 static int load_iv(unsigned char **fromp,unsigned char *to, int num);
83 static int def_callback();
87 static int def_callback(buf, num, w)
93 /* We should not ever call the default callback routine from
95 PEMerr(PEM_F_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
101 prompt=EVP_get_pw_prompt();
103 prompt="Enter PEM pass phrase:";
107 i=EVP_read_pw_string(buf,num,prompt,w);
110 PEMerr(PEM_F_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);
111 memset(buf,0,(unsigned int)num);
117 fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);
126 void PEM_proc_type(buf, type)
132 if (type == PEM_TYPE_ENCRYPTED)
134 else if (type == PEM_TYPE_MIC_CLEAR)
136 else if (type == PEM_TYPE_MIC_ONLY)
141 strcat(buf,"Proc-Type: 4,");
146 void PEM_dek_info(buf, type, len, str)
152 static unsigned char map[17]="0123456789ABCDEF";
156 strcat(buf,"DEK-Info: ");
160 for (i=0; i<len; i++)
162 buf[j+i*2] =map[(str[i]>>4)&0x0f];
163 buf[j+i*2+1]=map[(str[i] )&0x0f];
170 char *PEM_ASN1_read(d2i,name,fp, x, cb)
180 if ((b=BIO_new(BIO_s_file())) == NULL)
182 PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
185 BIO_set_fp(b,fp,BIO_NOCLOSE);
186 ret=PEM_ASN1_read_bio(d2i,name,b,x,cb);
192 char *PEM_ASN1_read_bio(d2i,name,bp, x, cb)
199 EVP_CIPHER_INFO cipher;
200 char *nm=NULL,*header=NULL;
201 unsigned char *p=NULL,*data=NULL;
207 if (!PEM_read_bio(bp,&nm,&header,&data,&len)) return(NULL);
208 if ( (strcmp(nm,name) == 0) ||
209 ((strcmp(nm,PEM_STRING_RSA) == 0) &&
210 (strcmp(name,PEM_STRING_EVP_PKEY) == 0)) ||
211 ((strcmp(nm,PEM_STRING_DSA) == 0) &&
212 (strcmp(name,PEM_STRING_EVP_PKEY) == 0)) ||
213 ((strcmp(nm,PEM_STRING_X509_OLD) == 0) &&
214 (strcmp(name,PEM_STRING_X509) == 0)) ||
215 ((strcmp(nm,PEM_STRING_X509_REQ_OLD) == 0) &&
216 (strcmp(name,PEM_STRING_X509_REQ) == 0))
223 if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
224 if (!PEM_do_header(&cipher,data,&len,cb)) goto err;
226 if (strcmp(name,PEM_STRING_EVP_PKEY) == 0)
228 if (strcmp(nm,PEM_STRING_RSA) == 0)
229 ret=d2i(EVP_PKEY_RSA,x,&p,len);
230 else if (strcmp(nm,PEM_STRING_DSA) == 0)
231 ret=d2i(EVP_PKEY_DSA,x,&p,len);
236 PEMerr(PEM_F_PEM_ASN1_READ_BIO,ERR_R_ASN1_LIB);
245 int PEM_ASN1_write(i2d,name,fp, x, enc, kstr, klen, callback)
258 if ((b=BIO_new(BIO_s_file())) == NULL)
260 PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
263 BIO_set_fp(b,fp,BIO_NOCLOSE);
264 ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback);
270 int PEM_ASN1_write_bio(i2d,name,bp, x, enc, kstr, klen, callback)
281 int dsize=0,i,j,ret=0;
282 unsigned char *p,*data=NULL;
284 #define PEM_BUFSIZE 1024
285 char buf[PEM_BUFSIZE];
286 unsigned char key[EVP_MAX_KEY_LENGTH];
287 unsigned char iv[EVP_MAX_IV_LENGTH];
291 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
294 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
299 if ((dsize=i2d(x,NULL)) < 0)
301 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
305 /* dzise + 8 bytes are needed */
306 data=(unsigned char *)Malloc((unsigned int)dsize+20);
309 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
319 if (callback == NULL)
320 klen=def_callback(buf,PEM_BUFSIZE,1);
322 klen=(*callback)(buf,PEM_BUFSIZE,1);
325 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
328 kstr=(unsigned char *)buf;
330 RAND_seed(data,i);/* put in the RSA key. */
331 RAND_bytes(iv,8); /* Generate a salt */
332 /* The 'iv' is used as the iv and as a salt. It is
333 * NOT taken from the BytesToKey function */
334 EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
336 if (kstr == (unsigned char *)buf) memset(buf,0,PEM_BUFSIZE);
339 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
340 PEM_dek_info(buf,objstr,8,(char *)iv);
343 EVP_EncryptInit(&ctx,enc,key,iv);
344 EVP_EncryptUpdate(&ctx,data,&j,data,i);
345 EVP_EncryptFinal(&ctx,&(data[j]),&i);
354 i=PEM_write_bio(bp,name,buf,data,i);
357 memset(key,0,sizeof(key));
358 memset(iv,0,sizeof(iv));
359 memset((char *)&ctx,0,sizeof(ctx));
360 memset(buf,0,PEM_BUFSIZE);
361 memset(data,0,(unsigned int)dsize);
366 int PEM_do_header(cipher, data, plen, callback)
367 EVP_CIPHER_INFO *cipher;
375 unsigned char key[EVP_MAX_KEY_LENGTH];
376 char buf[PEM_BUFSIZE];
380 if (cipher->cipher == NULL) return(1);
381 if (callback == NULL)
382 klen=def_callback(buf,PEM_BUFSIZE,0);
384 klen=callback(buf,PEM_BUFSIZE,0);
387 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
390 EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
391 (unsigned char *)buf,klen,1,key,NULL);
394 EVP_DecryptInit(&ctx,cipher->cipher,key,&(cipher->iv[0]));
395 EVP_DecryptUpdate(&ctx,data,&i,data,j);
396 o=EVP_DecryptFinal(&ctx,&(data[i]),&j);
397 EVP_CIPHER_CTX_cleanup(&ctx);
398 memset((char *)buf,0,sizeof(buf));
399 memset((char *)key,0,sizeof(key));
403 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
410 int PEM_get_EVP_CIPHER_INFO(header,cipher)
412 EVP_CIPHER_INFO *cipher;
415 EVP_CIPHER *enc=NULL;
419 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
421 if (strncmp(header,"Proc-Type: ",11) != 0)
422 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
424 if (*header != '4') return(0); header++;
425 if (*header != ',') return(0); header++;
426 if (strncmp(header,"ENCRYPTED",9) != 0)
427 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
428 for (; (*header != '\n') && (*header != '\0'); header++)
431 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
433 if (strncmp(header,"DEK-Info: ",10) != 0)
434 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
441 if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
442 ((c >= '0') && (c <= '9'))))
448 cipher->cipher=enc=EVP_get_cipherbyname(p);
454 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
457 if (!load_iv((unsigned char **)&header,&(cipher->iv[0]),8)) return(0);
462 static int load_iv(fromp,to,num)
463 unsigned char **fromp,*to;
470 for (i=0; i<num; i++) to[i]=0;
472 for (i=0; i<num; i++)
474 if ((*from >= '0') && (*from <= '9'))
476 else if ((*from >= 'A') && (*from <= 'F'))
478 else if ((*from >= 'a') && (*from <= 'f'))
482 PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
486 to[i/2]|=v<<(long)((!(i&1))*4);
494 int PEM_write(fp, name, header, data,len)
504 if ((b=BIO_new(BIO_s_file())) == NULL)
506 PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
509 BIO_set_fp(b,fp,BIO_NOCLOSE);
510 ret=PEM_write_bio(b, name, header, data,len);
516 int PEM_write_bio(bp, name, header, data,len)
526 int reason=ERR_R_BUF_LIB;
528 EVP_EncodeInit(&ctx);
531 if ( (BIO_write(bp,"-----BEGIN ",11) != 11) ||
532 (BIO_write(bp,name,nlen) != nlen) ||
533 (BIO_write(bp,"-----\n",6) != 6))
539 if ( (BIO_write(bp,header,i) != i) ||
540 (BIO_write(bp,"\n",1) != 1))
544 buf=(unsigned char *)Malloc(PEM_BUFSIZE*8);
547 reason=ERR_R_MALLOC_FAILURE;
554 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
555 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
556 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
562 EVP_EncodeFinal(&ctx,buf,&outl);
563 if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
565 if ( (BIO_write(bp,"-----END ",9) != 9) ||
566 (BIO_write(bp,name,nlen) != nlen) ||
567 (BIO_write(bp,"-----\n",6) != 6))
571 PEMerr(PEM_F_PEM_WRITE_BIO,reason);
576 int PEM_read(fp, name, header, data,len)
580 unsigned char **data;
586 if ((b=BIO_new(BIO_s_file())) == NULL)
588 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
591 BIO_set_fp(b,fp,BIO_NOCLOSE);
592 ret=PEM_read_bio(b, name, header, data,len);
598 int PEM_read_bio(bp, name, header, data, len)
602 unsigned char **data;
606 int end=0,i,k,bl=0,hl=0,nohead=0;
610 BUF_MEM *dataB,*tmpB;
613 headerB=BUF_MEM_new();
615 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
617 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
624 i=BIO_gets(bp,buf,254);
628 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
632 while ((i >= 0) && (buf[i] <= ' ')) i--;
633 buf[++i]='\n'; buf[++i]='\0';
635 if (strncmp(buf,"-----BEGIN ",11) == 0)
637 i=strlen(&(buf[11]));
639 if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
641 if (!BUF_MEM_grow(nameB,i+9))
643 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
646 strncpy(nameB->data,&(buf[11]),(unsigned int)i-6);
647 nameB->data[i-6]='\0';
652 if (!BUF_MEM_grow(headerB,256))
653 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
654 headerB->data[0]='\0';
657 i=BIO_gets(bp,buf,254);
660 while ((i >= 0) && (buf[i] <= ' ')) i--;
661 buf[++i]='\n'; buf[++i]='\0';
663 if (buf[0] == '\n') break;
664 if (!BUF_MEM_grow(headerB,hl+i+9))
665 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
666 if (strncmp(buf,"-----END ",9) == 0)
671 strncpy(&(headerB->data[hl]),buf,(unsigned int)i);
672 headerB->data[hl+i]='\0';
677 if (!BUF_MEM_grow(dataB,1024))
678 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
684 i=BIO_gets(bp,buf,254);
687 while ((i >= 0) && (buf[i] <= ' ')) i--;
688 buf[++i]='\n'; buf[++i]='\0';
691 if (strncmp(buf,"-----END ",9) == 0)
694 if (!BUF_MEM_grow(dataB,i+bl+9))
696 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
699 strncpy(&(dataB->data[bl]),buf,(unsigned int)i);
700 dataB->data[bl+i]='\0';
705 i=BIO_gets(bp,buf,254);
708 while ((i >= 0) && (buf[i] <= ' ')) i--;
709 buf[++i]='\n'; buf[++i]='\0';
722 i=strlen(nameB->data);
723 if ( (strncmp(buf,"-----END ",9) != 0) ||
724 (strncmp(nameB->data,&(buf[9]),(unsigned int)i) != 0) ||
725 (strncmp(&(buf[9+i]),"-----\n",6) != 0))
727 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
731 EVP_DecodeInit(&ctx);
732 i=EVP_DecodeUpdate(&ctx,
733 (unsigned char *)dataB->data,&bl,
734 (unsigned char *)dataB->data,bl);
737 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
740 i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
743 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
748 if (bl == 0) goto err;
750 *header=headerB->data;
751 *data=(unsigned char *)dataB->data;
759 BUF_MEM_free(headerB);