Stop assuming the IV is 8 bytes long, use the real size instead.
[openssl.git] / crypto / pem / pem_info.c
1 /* crypto/pem/pem_info.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/x509.h>
65 #include <openssl/pem.h>
66
67 #ifndef OPENSSL_NO_FP_API
68 STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, void *u)
69         {
70         BIO *b;
71         STACK_OF(X509_INFO) *ret;
72
73         if ((b=BIO_new(BIO_s_file())) == NULL)
74                 {
75                 PEMerr(PEM_F_PEM_X509_INFO_READ,ERR_R_BUF_LIB);
76                 return(0);
77                 }
78         BIO_set_fp(b,fp,BIO_NOCLOSE);
79         ret=PEM_X509_INFO_read_bio(b,sk,cb,u);
80         BIO_free(b);
81         return(ret);
82         }
83 #endif
84
85 STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, void *u)
86         {
87         X509_INFO *xi=NULL;
88         char *name=NULL,*header=NULL,**pp;
89         unsigned char *data=NULL,*p;
90         long len,error=0;
91         int ok=0;
92         STACK_OF(X509_INFO) *ret=NULL;
93         unsigned int i,raw;
94         char *(*d2i)();
95
96         if (sk == NULL)
97                 {
98                 if ((ret=sk_X509_INFO_new_null()) == NULL)
99                         {
100                         PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_MALLOC_FAILURE);
101                         goto err;
102                         }
103                 }
104         else
105                 ret=sk;
106
107         if ((xi=X509_INFO_new()) == NULL) goto err;
108         for (;;)
109                 {
110                 raw=0;
111                 i=PEM_read_bio(bp,&name,&header,&data,&len);
112                 if (i == 0)
113                         {
114                         error=ERR_GET_REASON(ERR_peek_error());
115                         if (error == PEM_R_NO_START_LINE)
116                                 {
117                                 ERR_clear_error();
118                                 break;
119                                 }
120                         goto err;
121                         }
122 start:
123                 if (    (strcmp(name,PEM_STRING_X509) == 0) ||
124                         (strcmp(name,PEM_STRING_X509_OLD) == 0))
125                         {
126                         d2i=(char *(*)())d2i_X509;
127                         if (xi->x509 != NULL)
128                                 {
129                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
130                                 if ((xi=X509_INFO_new()) == NULL) goto err;
131                                 goto start;
132                                 }
133                         pp=(char **)&(xi->x509);
134                         }
135                 else if ((strcmp(name,PEM_STRING_X509_TRUSTED) == 0))
136                         {
137                         d2i=(char *(*)())d2i_X509_AUX;
138                         if (xi->x509 != NULL)
139                                 {
140                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
141                                 if ((xi=X509_INFO_new()) == NULL) goto err;
142                                 goto start;
143                                 }
144                         pp=(char **)&(xi->x509);
145                         }
146                 else if (strcmp(name,PEM_STRING_X509_CRL) == 0)
147                         {
148                         d2i=(char *(*)())d2i_X509_CRL;
149                         if (xi->crl != NULL)
150                                 {
151                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
152                                 if ((xi=X509_INFO_new()) == NULL) goto err;
153                                 goto start;
154                                 }
155                         pp=(char **)&(xi->crl);
156                         }
157                 else
158 #ifndef OPENSSL_NO_RSA
159                         if (strcmp(name,PEM_STRING_RSA) == 0)
160                         {
161                         d2i=(char *(*)())d2i_RSAPrivateKey;
162                         if (xi->x_pkey != NULL) 
163                                 {
164                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
165                                 if ((xi=X509_INFO_new()) == NULL) goto err;
166                                 goto start;
167                                 }
168
169                         xi->enc_data=NULL;
170                         xi->enc_len=0;
171
172                         xi->x_pkey=X509_PKEY_new();
173                         if ((xi->x_pkey->dec_pkey=EVP_PKEY_new()) == NULL)
174                                 goto err;
175                         xi->x_pkey->dec_pkey->type=EVP_PKEY_RSA;
176                         pp=(char **)&(xi->x_pkey->dec_pkey->pkey.rsa);
177                         if ((int)strlen(header) > 10) /* assume encrypted */
178                                 raw=1;
179                         }
180                 else
181 #endif
182 #ifndef OPENSSL_NO_DSA
183                         if (strcmp(name,PEM_STRING_DSA) == 0)
184                         {
185                         d2i=(char *(*)())d2i_DSAPrivateKey;
186                         if (xi->x_pkey != NULL) 
187                                 {
188                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
189                                 if ((xi=X509_INFO_new()) == NULL) goto err;
190                                 goto start;
191                                 }
192
193                         xi->enc_data=NULL;
194                         xi->enc_len=0;
195
196                         xi->x_pkey=X509_PKEY_new();
197                         if ((xi->x_pkey->dec_pkey=EVP_PKEY_new()) == NULL)
198                                 goto err;
199                         xi->x_pkey->dec_pkey->type=EVP_PKEY_DSA;
200                         pp=(char **)&(xi->x_pkey->dec_pkey->pkey.dsa);
201                         if ((int)strlen(header) > 10) /* assume encrypted */
202                                 raw=1;
203                         }
204                 else
205 #endif
206 #ifndef OPENSSL_NO_ECDSA
207                         if (strcmp(name,PEM_STRING_ECDSA) == 0)
208                         {
209                                 d2i=(char *(*)())d2i_ECDSAPrivateKey;
210                                 if (xi->x_pkey != NULL) 
211                                 {
212                                         if (!sk_X509_INFO_push(ret,xi)) goto err;
213                                         if ((xi=X509_INFO_new()) == NULL) goto err;
214                                                 goto start;
215                                 }
216  
217                         xi->enc_data=NULL;
218                         xi->enc_len=0;
219  
220                         xi->x_pkey=X509_PKEY_new();
221                         if ((xi->x_pkey->dec_pkey=EVP_PKEY_new()) == NULL)
222                                 goto err;
223                         xi->x_pkey->dec_pkey->type=EVP_PKEY_ECDSA;
224                         pp=(char **)&(xi->x_pkey->dec_pkey->pkey.ecdsa);
225                         if ((int)strlen(header) > 10) /* assume encrypted */
226                                 raw=1;
227                         }
228                 else
229 #endif
230                         {
231                         d2i=NULL;
232                         pp=NULL;
233                         }
234
235                 if (d2i != NULL)
236                         {
237                         if (!raw)
238                                 {
239                                 EVP_CIPHER_INFO cipher;
240
241                                 if (!PEM_get_EVP_CIPHER_INFO(header,&cipher))
242                                         goto err;
243                                 if (!PEM_do_header(&cipher,data,&len,cb,u))
244                                         goto err;
245                                 p=data;
246                                 if (d2i(pp,&p,len) == NULL)
247                                         {
248                                         PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_ASN1_LIB);
249                                         goto err;
250                                         }
251                                 }
252                         else
253                                 { /* encrypted RSA data */
254                                 if (!PEM_get_EVP_CIPHER_INFO(header,
255                                         &xi->enc_cipher)) goto err;
256                                 xi->enc_data=(char *)data;
257                                 xi->enc_len=(int)len;
258                                 data=NULL;
259                                 }
260                         }
261                 else    {
262                         /* unknown */
263                         }
264                 if (name != NULL) OPENSSL_free(name);
265                 if (header != NULL) OPENSSL_free(header);
266                 if (data != NULL) OPENSSL_free(data);
267                 name=NULL;
268                 header=NULL;
269                 data=NULL;
270                 }
271
272         /* if the last one hasn't been pushed yet and there is anything
273          * in it then add it to the stack ... 
274          */
275         if ((xi->x509 != NULL) || (xi->crl != NULL) ||
276                 (xi->x_pkey != NULL) || (xi->enc_data != NULL))
277                 {
278                 if (!sk_X509_INFO_push(ret,xi)) goto err;
279                 xi=NULL;
280                 }
281         ok=1;
282 err:
283         if (xi != NULL) X509_INFO_free(xi);
284         if (!ok)
285                 {
286                 for (i=0; ((int)i)<sk_X509_INFO_num(ret); i++)
287                         {
288                         xi=sk_X509_INFO_value(ret,i);
289                         X509_INFO_free(xi);
290                         }
291                 if (ret != sk) sk_X509_INFO_free(ret);
292                 ret=NULL;
293                 }
294                 
295         if (name != NULL) OPENSSL_free(name);
296         if (header != NULL) OPENSSL_free(header);
297         if (data != NULL) OPENSSL_free(data);
298         return(ret);
299         }
300
301
302 /* A TJH addition */
303 int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
304              unsigned char *kstr, int klen, pem_password_cb *cb, void *u)
305         {
306         EVP_CIPHER_CTX ctx;
307         int i,ret=0;
308         unsigned char *data=NULL;
309         const char *objstr=NULL;
310         char buf[PEM_BUFSIZE];
311         unsigned char *iv=NULL;
312         
313         if (enc != NULL)
314                 {
315                 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
316                 if (objstr == NULL)
317                         {
318                         PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
319                         goto err;
320                         }
321                 }
322
323         /* now for the fun part ... if we have a private key then 
324          * we have to be able to handle a not-yet-decrypted key
325          * being written out correctly ... if it is decrypted or
326          * it is non-encrypted then we use the base code
327          */
328         if (xi->x_pkey!=NULL)
329                 {
330                 if ( (xi->enc_data!=NULL) && (xi->enc_len>0) )
331                         {
332                         /* copy from weirdo names into more normal things */
333                         iv=xi->enc_cipher.iv;
334                         data=(unsigned char *)xi->enc_data;
335                         i=xi->enc_len;
336
337                         /* we take the encryption data from the
338                          * internal stuff rather than what the
339                          * user has passed us ... as we have to 
340                          * match exactly for some strange reason
341                          */
342                         objstr=OBJ_nid2sn(
343                                 EVP_CIPHER_nid(xi->enc_cipher.cipher));
344                         if (objstr == NULL)
345                                 {
346                                 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
347                                 goto err;
348                                 }
349
350                         /* create the right magic header stuff */
351                         buf[0]='\0';
352                         PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
353                         PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);
354
355                         /* use the normal code to write things out */
356                         i=PEM_write_bio(bp,PEM_STRING_RSA,buf,data,i);
357                         if (i <= 0) goto err;
358                         }
359                 else
360                         {
361                         /* Add DSA/DH */
362 #ifndef OPENSSL_NO_RSA
363                         /* normal optionally encrypted stuff */
364                         if (PEM_write_bio_RSAPrivateKey(bp,
365                                 xi->x_pkey->dec_pkey->pkey.rsa,
366                                 enc,kstr,klen,cb,u)<=0)
367                                 goto err;
368 #endif
369                         }
370                 }
371
372         /* if we have a certificate then write it out now */
373         if ((xi->x509 != NULL) || (PEM_write_bio_X509(bp,xi->x509) <= 0))
374                 goto err;
375
376         /* we are ignoring anything else that is loaded into the X509_INFO
377          * structure for the moment ... as I don't need it so I'm not
378          * coding it here and Eric can do it when this makes it into the
379          * base library --tjh
380          */
381
382         ret=1;
383
384 err:
385         memset((char *)&ctx,0,sizeof(ctx));
386         memset(buf,0,PEM_BUFSIZE);
387         return(ret);
388         }