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.]
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>
68 #include <openssl/des.h>
71 const char *PEM_version="PEM" OPENSSL_VERSION_PTEXT;
75 static int def_callback(char *buf, int num, int w);
76 static int load_iv(unsigned char **fromp,unsigned char *to, int num);
77 static int def_callback(char *buf, int num, int w)
80 /* We should not ever call the default callback routine from
82 PEMerr(PEM_F_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
88 prompt=EVP_get_pw_prompt();
90 prompt="Enter PEM pass phrase:";
94 i=EVP_read_pw_string(buf,num,prompt,w);
97 PEMerr(PEM_F_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);
98 memset(buf,0,(unsigned int)num);
104 fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);
113 void PEM_proc_type(char *buf, int type)
117 if (type == PEM_TYPE_ENCRYPTED)
119 else if (type == PEM_TYPE_MIC_CLEAR)
121 else if (type == PEM_TYPE_MIC_ONLY)
126 strcat(buf,"Proc-Type: 4,");
131 void PEM_dek_info(char *buf, const char *type, int len, char *str)
133 static unsigned char map[17]="0123456789ABCDEF";
137 strcat(buf,"DEK-Info: ");
141 for (i=0; i<len; i++)
143 buf[j+i*2] =map[(str[i]>>4)&0x0f];
144 buf[j+i*2+1]=map[(str[i] )&0x0f];
151 char *PEM_ASN1_read(char *(*d2i)(), const char *name, FILE *fp, char **x,
157 if ((b=BIO_new(BIO_s_file())) == NULL)
159 PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
162 BIO_set_fp(b,fp,BIO_NOCLOSE);
163 ret=PEM_ASN1_read_bio(d2i,name,b,x,cb);
169 char *PEM_ASN1_read_bio(char *(*d2i)(), const char *name, BIO *bp, char **x,
172 EVP_CIPHER_INFO cipher;
173 char *nm=NULL,*header=NULL;
174 unsigned char *p=NULL,*data=NULL;
180 if (!PEM_read_bio(bp,&nm,&header,&data,&len)) return(NULL);
181 if ( (strcmp(nm,name) == 0) ||
182 ((strcmp(nm,PEM_STRING_RSA) == 0) &&
183 (strcmp(name,PEM_STRING_EVP_PKEY) == 0)) ||
184 ((strcmp(nm,PEM_STRING_DSA) == 0) &&
185 (strcmp(name,PEM_STRING_EVP_PKEY) == 0)) ||
186 ((strcmp(nm,PEM_STRING_X509_OLD) == 0) &&
187 (strcmp(name,PEM_STRING_X509) == 0)) ||
188 ((strcmp(nm,PEM_STRING_X509_REQ_OLD) == 0) &&
189 (strcmp(name,PEM_STRING_X509_REQ) == 0))
196 if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
197 if (!PEM_do_header(&cipher,data,&len,cb)) goto err;
199 if (strcmp(name,PEM_STRING_EVP_PKEY) == 0)
201 if (strcmp(nm,PEM_STRING_RSA) == 0)
202 ret=d2i(EVP_PKEY_RSA,x,&p,len);
203 else if (strcmp(nm,PEM_STRING_DSA) == 0)
204 ret=d2i(EVP_PKEY_DSA,x,&p,len);
209 PEMerr(PEM_F_PEM_ASN1_READ_BIO,ERR_R_ASN1_LIB);
218 int PEM_ASN1_write(int (*i2d)(), const char *name, FILE *fp, char *x,
219 const EVP_CIPHER *enc, unsigned char *kstr, int klen,
225 if ((b=BIO_new(BIO_s_file())) == NULL)
227 PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
230 BIO_set_fp(b,fp,BIO_NOCLOSE);
231 ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback);
237 int PEM_ASN1_write_bio(int (*i2d)(), const char *name, BIO *bp, char *x,
238 const EVP_CIPHER *enc, unsigned char *kstr, int klen,
239 pem_password_cb *callback)
242 int dsize=0,i,j,ret=0;
243 unsigned char *p,*data=NULL;
244 const char *objstr=NULL;
245 #define PEM_BUFSIZE 1024
246 char buf[PEM_BUFSIZE];
247 unsigned char key[EVP_MAX_KEY_LENGTH];
248 unsigned char iv[EVP_MAX_IV_LENGTH];
252 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
255 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
260 if ((dsize=i2d(x,NULL)) < 0)
262 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
266 /* dzise + 8 bytes are needed */
267 data=(unsigned char *)Malloc((unsigned int)dsize+20);
270 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
280 if (callback == NULL)
281 klen=def_callback(buf,PEM_BUFSIZE,1);
283 klen=(*callback)(buf,PEM_BUFSIZE,1);
286 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
289 kstr=(unsigned char *)buf;
291 RAND_seed(data,i);/* put in the RSA key. */
292 RAND_bytes(iv,8); /* Generate a salt */
293 /* The 'iv' is used as the iv and as a salt. It is
294 * NOT taken from the BytesToKey function */
295 EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
297 if (kstr == (unsigned char *)buf) memset(buf,0,PEM_BUFSIZE);
300 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
301 PEM_dek_info(buf,objstr,8,(char *)iv);
304 EVP_EncryptInit(&ctx,enc,key,iv);
305 EVP_EncryptUpdate(&ctx,data,&j,data,i);
306 EVP_EncryptFinal(&ctx,&(data[j]),&i);
315 i=PEM_write_bio(bp,name,buf,data,i);
318 memset(key,0,sizeof(key));
319 memset(iv,0,sizeof(iv));
320 memset((char *)&ctx,0,sizeof(ctx));
321 memset(buf,0,PEM_BUFSIZE);
322 memset(data,0,(unsigned int)dsize);
327 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
333 unsigned char key[EVP_MAX_KEY_LENGTH];
334 char buf[PEM_BUFSIZE];
338 if (cipher->cipher == NULL) return(1);
339 if (callback == NULL)
340 klen=def_callback(buf,PEM_BUFSIZE,0);
342 klen=callback(buf,PEM_BUFSIZE,0);
345 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
348 EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
349 (unsigned char *)buf,klen,1,key,NULL);
352 EVP_DecryptInit(&ctx,cipher->cipher,key,&(cipher->iv[0]));
353 EVP_DecryptUpdate(&ctx,data,&i,data,j);
354 o=EVP_DecryptFinal(&ctx,&(data[i]),&j);
355 EVP_CIPHER_CTX_cleanup(&ctx);
356 memset((char *)buf,0,sizeof(buf));
357 memset((char *)key,0,sizeof(key));
361 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
368 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
371 const EVP_CIPHER *enc=NULL;
375 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
377 if (strncmp(header,"Proc-Type: ",11) != 0)
378 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
380 if (*header != '4') return(0); header++;
381 if (*header != ',') return(0); header++;
382 if (strncmp(header,"ENCRYPTED",9) != 0)
383 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
384 for (; (*header != '\n') && (*header != '\0'); header++)
387 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
389 if (strncmp(header,"DEK-Info: ",10) != 0)
390 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
397 if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
398 ((c >= '0') && (c <= '9'))))
404 cipher->cipher=enc=EVP_get_cipherbyname(p);
410 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
413 if (!load_iv((unsigned char **)&header,&(cipher->iv[0]),8)) return(0);
418 static int load_iv(unsigned char **fromp, unsigned char *to, int num)
424 for (i=0; i<num; i++) to[i]=0;
426 for (i=0; i<num; i++)
428 if ((*from >= '0') && (*from <= '9'))
430 else if ((*from >= 'A') && (*from <= 'F'))
432 else if ((*from >= 'a') && (*from <= 'f'))
436 PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
440 to[i/2]|=v<<(long)((!(i&1))*4);
448 int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,
454 if ((b=BIO_new(BIO_s_file())) == NULL)
456 PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
459 BIO_set_fp(b,fp,BIO_NOCLOSE);
460 ret=PEM_write_bio(b, name, header, data,len);
466 int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
472 int reason=ERR_R_BUF_LIB;
474 EVP_EncodeInit(&ctx);
477 if ( (BIO_write(bp,"-----BEGIN ",11) != 11) ||
478 (BIO_write(bp,name,nlen) != nlen) ||
479 (BIO_write(bp,"-----\n",6) != 6))
485 if ( (BIO_write(bp,header,i) != i) ||
486 (BIO_write(bp,"\n",1) != 1))
490 buf=(unsigned char *)Malloc(PEM_BUFSIZE*8);
493 reason=ERR_R_MALLOC_FAILURE;
500 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
501 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
502 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
508 EVP_EncodeFinal(&ctx,buf,&outl);
509 if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
511 if ( (BIO_write(bp,"-----END ",9) != 9) ||
512 (BIO_write(bp,name,nlen) != nlen) ||
513 (BIO_write(bp,"-----\n",6) != 6))
517 PEMerr(PEM_F_PEM_WRITE_BIO,reason);
522 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
528 if ((b=BIO_new(BIO_s_file())) == NULL)
530 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
533 BIO_set_fp(b,fp,BIO_NOCLOSE);
534 ret=PEM_read_bio(b, name, header, data,len);
540 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
544 int end=0,i,k,bl=0,hl=0,nohead=0;
548 BUF_MEM *dataB,*tmpB;
551 headerB=BUF_MEM_new();
553 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
555 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
562 i=BIO_gets(bp,buf,254);
566 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
570 while ((i >= 0) && (buf[i] <= ' ')) i--;
571 buf[++i]='\n'; buf[++i]='\0';
573 if (strncmp(buf,"-----BEGIN ",11) == 0)
575 i=strlen(&(buf[11]));
577 if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
579 if (!BUF_MEM_grow(nameB,i+9))
581 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
584 memcpy(nameB->data,&(buf[11]),i-6);
585 nameB->data[i-6]='\0';
590 if (!BUF_MEM_grow(headerB,256))
591 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
592 headerB->data[0]='\0';
595 i=BIO_gets(bp,buf,254);
598 while ((i >= 0) && (buf[i] <= ' ')) i--;
599 buf[++i]='\n'; buf[++i]='\0';
601 if (buf[0] == '\n') break;
602 if (!BUF_MEM_grow(headerB,hl+i+9))
603 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
604 if (strncmp(buf,"-----END ",9) == 0)
609 memcpy(&(headerB->data[hl]),buf,i);
610 headerB->data[hl+i]='\0';
615 if (!BUF_MEM_grow(dataB,1024))
616 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
622 i=BIO_gets(bp,buf,254);
625 while ((i >= 0) && (buf[i] <= ' ')) i--;
626 buf[++i]='\n'; buf[++i]='\0';
629 if (strncmp(buf,"-----END ",9) == 0)
632 if (!BUF_MEM_grow(dataB,i+bl+9))
634 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
637 memcpy(&(dataB->data[bl]),buf,i);
638 dataB->data[bl+i]='\0';
643 i=BIO_gets(bp,buf,254);
646 while ((i >= 0) && (buf[i] <= ' ')) i--;
647 buf[++i]='\n'; buf[++i]='\0';
660 i=strlen(nameB->data);
661 if ( (strncmp(buf,"-----END ",9) != 0) ||
662 (strncmp(nameB->data,&(buf[9]),i) != 0) ||
663 (strncmp(&(buf[9+i]),"-----\n",6) != 0))
665 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
669 EVP_DecodeInit(&ctx);
670 i=EVP_DecodeUpdate(&ctx,
671 (unsigned char *)dataB->data,&bl,
672 (unsigned char *)dataB->data,bl);
675 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
678 i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
681 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
686 if (bl == 0) goto err;
688 *header=headerB->data;
689 *data=(unsigned char *)dataB->data;
697 BUF_MEM_free(headerB);