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>
67 #include <openssl/pkcs12.h>
68 #ifndef OPENSSL_NO_DES
69 #include <openssl/des.h>
72 const char *PEM_version
="PEM" OPENSSL_VERSION_PTEXT
;
76 static int load_iv(char **fromp
,unsigned char *to
, int num
);
77 static int check_pem(const char *nm
, const char *name
);
79 int PEM_def_callback(char *buf
, int num
, int w
, void *key
)
81 #ifdef OPENSSL_NO_FP_API
82 /* We should not ever call the default callback routine from
84 PEMerr(PEM_F_DEF_CALLBACK
,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
96 prompt
=EVP_get_pw_prompt();
98 prompt
="Enter PEM pass phrase:";
102 i
=EVP_read_pw_string(buf
,num
,prompt
,w
);
105 PEMerr(PEM_F_DEF_CALLBACK
,PEM_R_PROBLEMS_GETTING_PASSWORD
);
106 memset(buf
,0,(unsigned int)num
);
112 fprintf(stderr
,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH
);
121 void PEM_proc_type(char *buf
, int type
)
125 if (type
== PEM_TYPE_ENCRYPTED
)
127 else if (type
== PEM_TYPE_MIC_CLEAR
)
129 else if (type
== PEM_TYPE_MIC_ONLY
)
134 BUF_strlcat(buf
,"Proc-Type: 4,",PEM_BUFSIZE
);
135 BUF_strlcat(buf
,str
,PEM_BUFSIZE
);
136 BUF_strlcat(buf
,"\n",PEM_BUFSIZE
);
139 void PEM_dek_info(char *buf
, const char *type
, int len
, char *str
)
141 static const unsigned char map
[17]="0123456789ABCDEF";
145 BUF_strlcat(buf
,"DEK-Info: ",PEM_BUFSIZE
);
146 BUF_strlcat(buf
,type
,PEM_BUFSIZE
);
147 BUF_strlcat(buf
,",",PEM_BUFSIZE
);
149 if (j
+ (len
* 2) + 1 > PEM_BUFSIZE
)
151 for (i
=0; i
<len
; i
++)
153 buf
[j
+i
*2] =map
[(str
[i
]>>4)&0x0f];
154 buf
[j
+i
*2+1]=map
[(str
[i
] )&0x0f];
160 #ifndef OPENSSL_NO_FP_API
161 void *PEM_ASN1_read(void *(*d2i
)(void **,const unsigned char **,long),
162 const char *name
, FILE *fp
,void **x
,pem_password_cb
*cb
,
168 if ((b
=BIO_new(BIO_s_file())) == NULL
)
170 PEMerr(PEM_F_PEM_ASN1_READ
,ERR_R_BUF_LIB
);
173 BIO_set_fp(b
,fp
,BIO_NOCLOSE
);
174 ret
=PEM_ASN1_read_bio(d2i
,name
,b
,x
,cb
,u
);
180 static int check_pem(const char *nm
, const char *name
)
182 /* Normal matching nm and name */
183 if (!strcmp(nm
,name
)) return 1;
185 /* Make PEM_STRING_EVP_PKEY match any private key */
187 if(!strcmp(nm
,PEM_STRING_PKCS8
) &&
188 !strcmp(name
,PEM_STRING_EVP_PKEY
)) return 1;
190 if(!strcmp(nm
,PEM_STRING_PKCS8INF
) &&
191 !strcmp(name
,PEM_STRING_EVP_PKEY
)) return 1;
193 if(!strcmp(nm
,PEM_STRING_RSA
) &&
194 !strcmp(name
,PEM_STRING_EVP_PKEY
)) return 1;
196 if(!strcmp(nm
,PEM_STRING_DSA
) &&
197 !strcmp(name
,PEM_STRING_EVP_PKEY
)) return 1;
199 if(!strcmp(nm
,PEM_STRING_ECPRIVATEKEY
) &&
200 !strcmp(name
,PEM_STRING_EVP_PKEY
)) return 1;
201 /* Permit older strings */
203 if(!strcmp(nm
,PEM_STRING_X509_OLD
) &&
204 !strcmp(name
,PEM_STRING_X509
)) return 1;
206 if(!strcmp(nm
,PEM_STRING_X509_REQ_OLD
) &&
207 !strcmp(name
,PEM_STRING_X509_REQ
)) return 1;
209 /* Allow normal certs to be read as trusted certs */
210 if(!strcmp(nm
,PEM_STRING_X509
) &&
211 !strcmp(name
,PEM_STRING_X509_TRUSTED
)) return 1;
213 if(!strcmp(nm
,PEM_STRING_X509_OLD
) &&
214 !strcmp(name
,PEM_STRING_X509_TRUSTED
)) return 1;
216 /* Some CAs use PKCS#7 with CERTIFICATE headers */
217 if(!strcmp(nm
, PEM_STRING_X509
) &&
218 !strcmp(name
, PEM_STRING_PKCS7
)) return 1;
223 int PEM_bytes_read_bio(unsigned char **pdata
, long *plen
, char **pnm
, const char *name
, BIO
*bp
,
224 pem_password_cb
*cb
, void *u
)
226 EVP_CIPHER_INFO cipher
;
227 char *nm
=NULL
,*header
=NULL
;
228 unsigned char *data
=NULL
;
234 if (!PEM_read_bio(bp
,&nm
,&header
,&data
,&len
)) {
235 if(ERR_GET_REASON(ERR_peek_error()) ==
237 ERR_add_error_data(2, "Expecting: ", name
);
240 if(check_pem(nm
, name
)) break;
242 OPENSSL_free(header
);
245 if (!PEM_get_EVP_CIPHER_INFO(header
,&cipher
)) goto err
;
246 if (!PEM_do_header(&cipher
,data
,&len
,cb
,u
)) goto err
;
257 if (!ret
|| !pnm
) OPENSSL_free(nm
);
258 OPENSSL_free(header
);
259 if (!ret
) OPENSSL_free(data
);
263 #ifndef OPENSSL_NO_FP_API
264 int PEM_ASN1_write(int (*i2d
)(void *,unsigned char **), const char *name
, FILE *fp
,
265 char *x
, const EVP_CIPHER
*enc
, unsigned char *kstr
,
266 int klen
, pem_password_cb
*callback
, void *u
)
271 if ((b
=BIO_new(BIO_s_file())) == NULL
)
273 PEMerr(PEM_F_PEM_ASN1_WRITE
,ERR_R_BUF_LIB
);
276 BIO_set_fp(b
,fp
,BIO_NOCLOSE
);
277 ret
=PEM_ASN1_write_bio(i2d
,name
,b
,x
,enc
,kstr
,klen
,callback
,u
);
283 int PEM_ASN1_write_bio(int (*i2d
)(void *,unsigned char **), const char *name
, BIO
*bp
,
284 char *x
, const EVP_CIPHER
*enc
, unsigned char *kstr
,
285 int klen
, pem_password_cb
*callback
, void *u
)
288 int dsize
=0,i
,j
,ret
=0;
289 unsigned char *p
,*data
=NULL
;
290 const char *objstr
=NULL
;
291 char buf
[PEM_BUFSIZE
];
292 unsigned char key
[EVP_MAX_KEY_LENGTH
];
293 unsigned char iv
[EVP_MAX_IV_LENGTH
];
297 objstr
=OBJ_nid2sn(EVP_CIPHER_nid(enc
));
300 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO
,PEM_R_UNSUPPORTED_CIPHER
);
305 if ((dsize
=i2d(x
,NULL
)) < 0)
307 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO
,ERR_R_ASN1_LIB
);
311 /* dzise + 8 bytes are needed */
312 /* actually it needs the cipher block size extra... */
313 data
=(unsigned char *)OPENSSL_malloc((unsigned int)dsize
+20);
316 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO
,ERR_R_MALLOC_FAILURE
);
326 if (callback
== NULL
)
327 klen
=PEM_def_callback(buf
,PEM_BUFSIZE
,1,u
);
329 klen
=(*callback
)(buf
,PEM_BUFSIZE
,1,u
);
332 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO
,PEM_R_READ_KEY
);
335 #ifdef CHARSET_EBCDIC
336 /* Convert the pass phrase from EBCDIC */
337 ebcdic2ascii(buf
, buf
, klen
);
339 kstr
=(unsigned char *)buf
;
341 RAND_add(data
,i
,0);/* put in the RSA key. */
342 OPENSSL_assert(enc
->iv_len
<= (int)sizeof(iv
));
343 if (RAND_pseudo_bytes(iv
,enc
->iv_len
) < 0) /* Generate a salt */
345 /* The 'iv' is used as the iv and as a salt. It is
346 * NOT taken from the BytesToKey function */
347 EVP_BytesToKey(enc
,EVP_md5(),iv
,kstr
,klen
,1,key
,NULL
);
349 if (kstr
== (unsigned char *)buf
) OPENSSL_cleanse(buf
,PEM_BUFSIZE
);
351 OPENSSL_assert(strlen(objstr
)+23+2*enc
->iv_len
+13 <= sizeof buf
);
354 PEM_proc_type(buf
,PEM_TYPE_ENCRYPTED
);
355 PEM_dek_info(buf
,objstr
,enc
->iv_len
,(char *)iv
);
358 EVP_CIPHER_CTX_init(&ctx
);
359 EVP_EncryptInit_ex(&ctx
,enc
,NULL
,key
,iv
);
360 EVP_EncryptUpdate(&ctx
,data
,&j
,data
,i
);
361 EVP_EncryptFinal_ex(&ctx
,&(data
[j
]),&i
);
362 EVP_CIPHER_CTX_cleanup(&ctx
);
371 i
=PEM_write_bio(bp
,name
,buf
,data
,i
);
374 OPENSSL_cleanse(key
,sizeof(key
));
375 OPENSSL_cleanse(iv
,sizeof(iv
));
376 OPENSSL_cleanse((char *)&ctx
,sizeof(ctx
));
377 OPENSSL_cleanse(buf
,PEM_BUFSIZE
);
380 OPENSSL_cleanse(data
,(unsigned int)dsize
);
386 int PEM_do_header(EVP_CIPHER_INFO
*cipher
, unsigned char *data
, long *plen
,
387 pem_password_cb
*callback
,void *u
)
392 unsigned char key
[EVP_MAX_KEY_LENGTH
];
393 char buf
[PEM_BUFSIZE
];
397 if (cipher
->cipher
== NULL
) return(1);
398 if (callback
== NULL
)
399 klen
=PEM_def_callback(buf
,PEM_BUFSIZE
,0,u
);
401 klen
=callback(buf
,PEM_BUFSIZE
,0,u
);
404 PEMerr(PEM_F_PEM_DO_HEADER
,PEM_R_BAD_PASSWORD_READ
);
407 #ifdef CHARSET_EBCDIC
408 /* Convert the pass phrase from EBCDIC */
409 ebcdic2ascii(buf
, buf
, klen
);
412 EVP_BytesToKey(cipher
->cipher
,EVP_md5(),&(cipher
->iv
[0]),
413 (unsigned char *)buf
,klen
,1,key
,NULL
);
416 EVP_CIPHER_CTX_init(&ctx
);
417 EVP_DecryptInit_ex(&ctx
,cipher
->cipher
,NULL
, key
,&(cipher
->iv
[0]));
418 EVP_DecryptUpdate(&ctx
,data
,&i
,data
,j
);
419 o
=EVP_DecryptFinal_ex(&ctx
,&(data
[i
]),&j
);
420 EVP_CIPHER_CTX_cleanup(&ctx
);
421 OPENSSL_cleanse((char *)buf
,sizeof(buf
));
422 OPENSSL_cleanse((char *)key
,sizeof(key
));
426 PEMerr(PEM_F_PEM_DO_HEADER
,PEM_R_BAD_DECRYPT
);
433 int PEM_get_EVP_CIPHER_INFO(char *header
, EVP_CIPHER_INFO
*cipher
)
436 const EVP_CIPHER
*enc
=NULL
;
438 char **header_pp
= &header
;
441 if ((header
== NULL
) || (*header
== '\0') || (*header
== '\n'))
443 if (strncmp(header
,"Proc-Type: ",11) != 0)
444 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO
,PEM_R_NOT_PROC_TYPE
); return(0); }
446 if (*header
!= '4') return(0); header
++;
447 if (*header
!= ',') return(0); header
++;
448 if (strncmp(header
,"ENCRYPTED",9) != 0)
449 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO
,PEM_R_NOT_ENCRYPTED
); return(0); }
450 for (; (*header
!= '\n') && (*header
!= '\0'); header
++)
453 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO
,PEM_R_SHORT_HEADER
); return(0); }
455 if (strncmp(header
,"DEK-Info: ",10) != 0)
456 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO
,PEM_R_NOT_DEK_INFO
); return(0); }
463 #ifndef CHARSET_EBCDIC
464 if (!( ((c
>= 'A') && (c
<= 'Z')) || (c
== '-') ||
465 ((c
>= '0') && (c
<= '9'))))
468 if (!( isupper(c
) || (c
== '-') ||
476 cipher
->cipher
=enc
=EVP_get_cipherbyname(p
);
482 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO
,PEM_R_UNSUPPORTED_ENCRYPTION
);
485 if (!load_iv(header_pp
,&(cipher
->iv
[0]),enc
->iv_len
))
491 static int load_iv(char **fromp
, unsigned char *to
, int num
)
497 for (i
=0; i
<num
; i
++) to
[i
]=0;
499 for (i
=0; i
<num
; i
++)
501 if ((*from
>= '0') && (*from
<= '9'))
503 else if ((*from
>= 'A') && (*from
<= 'F'))
505 else if ((*from
>= 'a') && (*from
<= 'f'))
509 PEMerr(PEM_F_LOAD_IV
,PEM_R_BAD_IV_CHARS
);
513 to
[i
/2]|=v
<<(long)((!(i
&1))*4);
520 #ifndef OPENSSL_NO_FP_API
521 int PEM_write(FILE *fp
, char *name
, char *header
, unsigned char *data
,
527 if ((b
=BIO_new(BIO_s_file())) == NULL
)
529 PEMerr(PEM_F_PEM_WRITE
,ERR_R_BUF_LIB
);
532 BIO_set_fp(b
,fp
,BIO_NOCLOSE
);
533 ret
=PEM_write_bio(b
, name
, header
, data
,len
);
539 int PEM_write_bio(BIO
*bp
, const char *name
, char *header
, unsigned char *data
,
543 unsigned char *buf
= NULL
;
545 int reason
=ERR_R_BUF_LIB
;
547 EVP_EncodeInit(&ctx
);
550 if ( (BIO_write(bp
,"-----BEGIN ",11) != 11) ||
551 (BIO_write(bp
,name
,nlen
) != nlen
) ||
552 (BIO_write(bp
,"-----\n",6) != 6))
558 if ( (BIO_write(bp
,header
,i
) != i
) ||
559 (BIO_write(bp
,"\n",1) != 1))
563 buf
= OPENSSL_malloc(PEM_BUFSIZE
*8);
566 reason
=ERR_R_MALLOC_FAILURE
;
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
))
581 EVP_EncodeFinal(&ctx
,buf
,&outl
);
582 if ((outl
> 0) && (BIO_write(bp
,(char *)buf
,outl
) != outl
)) goto err
;
585 if ( (BIO_write(bp
,"-----END ",9) != 9) ||
586 (BIO_write(bp
,name
,nlen
) != nlen
) ||
587 (BIO_write(bp
,"-----\n",6) != 6))
593 PEMerr(PEM_F_PEM_WRITE_BIO
,reason
);
597 #ifndef OPENSSL_NO_FP_API
598 int PEM_read(FILE *fp
, char **name
, char **header
, unsigned char **data
,
604 if ((b
=BIO_new(BIO_s_file())) == NULL
)
606 PEMerr(PEM_F_PEM_READ
,ERR_R_BUF_LIB
);
609 BIO_set_fp(b
,fp
,BIO_NOCLOSE
);
610 ret
=PEM_read_bio(b
, name
, header
, data
,len
);
616 int PEM_read_bio(BIO
*bp
, char **name
, char **header
, unsigned char **data
,
620 int end
=0,i
,k
,bl
=0,hl
=0,nohead
=0;
624 BUF_MEM
*dataB
,*tmpB
;
627 headerB
=BUF_MEM_new();
629 if ((nameB
== NULL
) || (headerB
== NULL
) || (dataB
== NULL
))
632 BUF_MEM_free(headerB
);
634 PEMerr(PEM_F_PEM_READ_BIO
,ERR_R_MALLOC_FAILURE
);
641 i
=BIO_gets(bp
,buf
,254);
645 PEMerr(PEM_F_PEM_READ_BIO
,PEM_R_NO_START_LINE
);
649 while ((i
>= 0) && (buf
[i
] <= ' ')) i
--;
650 buf
[++i
]='\n'; buf
[++i
]='\0';
652 if (strncmp(buf
,"-----BEGIN ",11) == 0)
654 i
=strlen(&(buf
[11]));
656 if (strncmp(&(buf
[11+i
-6]),"-----\n",6) != 0)
658 if (!BUF_MEM_grow(nameB
,i
+9))
660 PEMerr(PEM_F_PEM_READ_BIO
,ERR_R_MALLOC_FAILURE
);
663 memcpy(nameB
->data
,&(buf
[11]),i
-6);
664 nameB
->data
[i
-6]='\0';
669 if (!BUF_MEM_grow(headerB
,256))
670 { PEMerr(PEM_F_PEM_READ_BIO
,ERR_R_MALLOC_FAILURE
); goto err
; }
671 headerB
->data
[0]='\0';
674 i
=BIO_gets(bp
,buf
,254);
677 while ((i
>= 0) && (buf
[i
] <= ' ')) i
--;
678 buf
[++i
]='\n'; buf
[++i
]='\0';
680 if (buf
[0] == '\n') break;
681 if (!BUF_MEM_grow(headerB
,hl
+i
+9))
682 { PEMerr(PEM_F_PEM_READ_BIO
,ERR_R_MALLOC_FAILURE
); goto err
; }
683 if (strncmp(buf
,"-----END ",9) == 0)
688 memcpy(&(headerB
->data
[hl
]),buf
,i
);
689 headerB
->data
[hl
+i
]='\0';
694 if (!BUF_MEM_grow(dataB
,1024))
695 { PEMerr(PEM_F_PEM_READ_BIO
,ERR_R_MALLOC_FAILURE
); goto err
; }
701 i
=BIO_gets(bp
,buf
,254);
704 while ((i
>= 0) && (buf
[i
] <= ' ')) i
--;
705 buf
[++i
]='\n'; buf
[++i
]='\0';
708 if (strncmp(buf
,"-----END ",9) == 0)
711 if (!BUF_MEM_grow_clean(dataB
,i
+bl
+9))
713 PEMerr(PEM_F_PEM_READ_BIO
,ERR_R_MALLOC_FAILURE
);
716 memcpy(&(dataB
->data
[bl
]),buf
,i
);
717 dataB
->data
[bl
+i
]='\0';
722 i
=BIO_gets(bp
,buf
,254);
725 while ((i
>= 0) && (buf
[i
] <= ' ')) i
--;
726 buf
[++i
]='\n'; buf
[++i
]='\0';
739 i
=strlen(nameB
->data
);
740 if ( (strncmp(buf
,"-----END ",9) != 0) ||
741 (strncmp(nameB
->data
,&(buf
[9]),i
) != 0) ||
742 (strncmp(&(buf
[9+i
]),"-----\n",6) != 0))
744 PEMerr(PEM_F_PEM_READ_BIO
,PEM_R_BAD_END_LINE
);
748 EVP_DecodeInit(&ctx
);
749 i
=EVP_DecodeUpdate(&ctx
,
750 (unsigned char *)dataB
->data
,&bl
,
751 (unsigned char *)dataB
->data
,bl
);
754 PEMerr(PEM_F_PEM_READ_BIO
,PEM_R_BAD_BASE64_DECODE
);
757 i
=EVP_DecodeFinal(&ctx
,(unsigned char *)&(dataB
->data
[bl
]),&k
);
760 PEMerr(PEM_F_PEM_READ_BIO
,PEM_R_BAD_BASE64_DECODE
);
765 if (bl
== 0) goto err
;
767 *header
=headerB
->data
;
768 *data
=(unsigned char *)dataB
->data
;
771 OPENSSL_free(headerB
);
776 BUF_MEM_free(headerB
);