1 /* crypto/pem/pem_lib.c */
2 /* Copyright (C) 1995-1997 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 part of SSLeay 0.8.1b 29-Jun-1998";
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);
300 /* dzise + 8 bytes are needed */
301 data=(unsigned char *)Malloc((unsigned int)dsize+20);
304 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
314 if (callback == NULL)
315 klen=def_callback(buf,PEM_BUFSIZE,1);
317 klen=(*callback)(buf,PEM_BUFSIZE,1);
320 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
323 kstr=(unsigned char *)buf;
325 RAND_seed(data,i);/* put in the RSA key. */
326 RAND_bytes(iv,8); /* Generate a salt */
327 /* The 'iv' is used as the iv and as a salt. It is
328 * NOT taken from the BytesToKey function */
329 EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
331 if (kstr == (unsigned char *)buf) memset(buf,0,PEM_BUFSIZE);
334 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
335 PEM_dek_info(buf,objstr,8,(char *)iv);
338 EVP_EncryptInit(&ctx,enc,key,iv);
339 EVP_EncryptUpdate(&ctx,data,&j,data,i);
340 EVP_EncryptFinal(&ctx,&(data[j]),&i);
349 i=PEM_write_bio(bp,name,buf,data,i);
352 memset(key,0,sizeof(key));
353 memset(iv,0,sizeof(iv));
354 memset((char *)&ctx,0,sizeof(ctx));
355 memset(buf,0,PEM_BUFSIZE);
356 memset(data,0,(unsigned int)dsize);
361 int PEM_do_header(cipher, data, plen, callback)
362 EVP_CIPHER_INFO *cipher;
370 unsigned char key[EVP_MAX_KEY_LENGTH];
371 char buf[PEM_BUFSIZE];
375 if (cipher->cipher == NULL) return(1);
376 if (callback == NULL)
377 klen=def_callback(buf,PEM_BUFSIZE,0);
379 klen=callback(buf,PEM_BUFSIZE,0);
382 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
385 EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
386 (unsigned char *)buf,klen,1,key,NULL);
389 EVP_DecryptInit(&ctx,cipher->cipher,key,&(cipher->iv[0]));
390 EVP_DecryptUpdate(&ctx,data,&i,data,j);
391 o=EVP_DecryptFinal(&ctx,&(data[i]),&j);
392 EVP_CIPHER_CTX_cleanup(&ctx);
393 memset((char *)buf,0,sizeof(buf));
394 memset((char *)key,0,sizeof(key));
398 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
405 int PEM_get_EVP_CIPHER_INFO(header,cipher)
407 EVP_CIPHER_INFO *cipher;
410 EVP_CIPHER *enc=NULL;
414 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
416 if (strncmp(header,"Proc-Type: ",11) != 0)
417 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
419 if (*header != '4') return(0); header++;
420 if (*header != ',') return(0); header++;
421 if (strncmp(header,"ENCRYPTED",9) != 0)
422 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
423 for (; (*header != '\n') && (*header != '\0'); header++)
426 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
428 if (strncmp(header,"DEK-Info: ",10) != 0)
429 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
436 if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
437 ((c >= '0') && (c <= '9'))))
443 cipher->cipher=enc=EVP_get_cipherbyname(p);
449 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
452 if (!load_iv((unsigned char **)&header,&(cipher->iv[0]),8)) return(0);
457 static int load_iv(fromp,to,num)
458 unsigned char **fromp,*to;
465 for (i=0; i<num; i++) to[i]=0;
467 for (i=0; i<num; i++)
469 if ((*from >= '0') && (*from <= '9'))
471 else if ((*from >= 'A') && (*from <= 'F'))
473 else if ((*from >= 'a') && (*from <= 'f'))
477 PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
481 to[i/2]|=v<<(long)((!(i&1))*4);
489 int PEM_write(fp, name, header, data,len)
499 if ((b=BIO_new(BIO_s_file())) == NULL)
501 PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
504 BIO_set_fp(b,fp,BIO_NOCLOSE);
505 ret=PEM_write_bio(b, name, header, data,len);
511 int PEM_write_bio(bp, name, header, data,len)
521 int reason=ERR_R_BUF_LIB;
523 EVP_EncodeInit(&ctx);
526 if ( (BIO_write(bp,"-----BEGIN ",11) != 11) ||
527 (BIO_write(bp,name,nlen) != nlen) ||
528 (BIO_write(bp,"-----\n",6) != 6))
534 if ( (BIO_write(bp,header,i) != i) ||
535 (BIO_write(bp,"\n",1) != 1))
539 buf=(unsigned char *)Malloc(PEM_BUFSIZE*8);
542 reason=ERR_R_MALLOC_FAILURE;
549 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
550 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
551 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
557 EVP_EncodeFinal(&ctx,buf,&outl);
558 if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
560 if ( (BIO_write(bp,"-----END ",9) != 9) ||
561 (BIO_write(bp,name,nlen) != nlen) ||
562 (BIO_write(bp,"-----\n",6) != 6))
566 PEMerr(PEM_F_PEM_WRITE_BIO,reason);
571 int PEM_read(fp, name, header, data,len)
575 unsigned char **data;
581 if ((b=BIO_new(BIO_s_file())) == NULL)
583 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
586 BIO_set_fp(b,fp,BIO_NOCLOSE);
587 ret=PEM_read_bio(b, name, header, data,len);
593 int PEM_read_bio(bp, name, header, data, len)
597 unsigned char **data;
601 int end=0,i,k,bl=0,hl=0,nohead=0;
605 BUF_MEM *dataB,*tmpB;
608 headerB=BUF_MEM_new();
610 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
612 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
619 i=BIO_gets(bp,buf,254);
623 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
627 while ((i >= 0) && (buf[i] <= ' ')) i--;
628 buf[++i]='\n'; buf[++i]='\0';
630 if (strncmp(buf,"-----BEGIN ",11) == 0)
632 i=strlen(&(buf[11]));
634 if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
636 if (!BUF_MEM_grow(nameB,i+9))
638 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
641 strncpy(nameB->data,&(buf[11]),(unsigned int)i-6);
642 nameB->data[i-6]='\0';
647 if (!BUF_MEM_grow(headerB,256))
648 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
649 headerB->data[0]='\0';
652 i=BIO_gets(bp,buf,254);
655 while ((i >= 0) && (buf[i] <= ' ')) i--;
656 buf[++i]='\n'; buf[++i]='\0';
658 if (buf[0] == '\n') break;
659 if (!BUF_MEM_grow(headerB,hl+i+9))
660 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
661 if (strncmp(buf,"-----END ",9) == 0)
666 strncpy(&(headerB->data[hl]),buf,(unsigned int)i);
667 headerB->data[hl+i]='\0';
672 if (!BUF_MEM_grow(dataB,1024))
673 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
679 i=BIO_gets(bp,buf,254);
682 while ((i >= 0) && (buf[i] <= ' ')) i--;
683 buf[++i]='\n'; buf[++i]='\0';
686 if (strncmp(buf,"-----END ",9) == 0)
689 if (!BUF_MEM_grow(dataB,i+bl+9))
691 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
694 strncpy(&(dataB->data[bl]),buf,(unsigned int)i);
695 dataB->data[bl+i]='\0';
700 i=BIO_gets(bp,buf,254);
703 while ((i >= 0) && (buf[i] <= ' ')) i--;
704 buf[++i]='\n'; buf[++i]='\0';
717 i=strlen(nameB->data);
718 if ( (strncmp(buf,"-----END ",9) != 0) ||
719 (strncmp(nameB->data,&(buf[9]),(unsigned int)i) != 0) ||
720 (strncmp(&(buf[9+i]),"-----\n",6) != 0))
722 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
726 EVP_DecodeInit(&ctx);
727 i=EVP_DecodeUpdate(&ctx,
728 (unsigned char *)dataB->data,&bl,
729 (unsigned char *)dataB->data,bl);
732 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
735 i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
738 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
743 if (bl == 0) goto err;
745 *header=headerB->data;
746 *data=(unsigned char *)dataB->data;
754 BUF_MEM_free(headerB);