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#ifndef OPENSSL_NO_RSA
67#include <openssl/rsa.h>
68#endif
69#ifndef OPENSSL_NO_DSA
70#include <openssl/dsa.h>
71#endif
72
73#ifndef OPENSSL_NO_FP_API
74STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, void *u)
75	{
76        BIO *b;
77        STACK_OF(X509_INFO) *ret;
78
79        if ((b=BIO_new(BIO_s_file())) == NULL)
80		{
81		PEMerr(PEM_F_PEM_X509_INFO_READ,ERR_R_BUF_LIB);
82                return(0);
83		}
84        BIO_set_fp(b,fp,BIO_NOCLOSE);
85        ret=PEM_X509_INFO_read_bio(b,sk,cb,u);
86        BIO_free(b);
87        return(ret);
88	}
89#endif
90
91STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, void *u)
92	{
93	X509_INFO *xi=NULL;
94	char *name=NULL,*header=NULL;
95	void *pp;
96	unsigned char *data=NULL;
97	const unsigned char *p;
98	long len,error=0;
99	int ok=0;
100	STACK_OF(X509_INFO) *ret=NULL;
101	unsigned int i,raw,ptype;
102	d2i_of_void *d2i = 0;
103
104	if (sk == NULL)
105		{
106		if ((ret=sk_X509_INFO_new_null()) == NULL)
107			{
108			PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_MALLOC_FAILURE);
109			goto err;
110			}
111		}
112	else
113		ret=sk;
114
115	if ((xi=X509_INFO_new()) == NULL) goto err;
116	for (;;)
117		{
118		raw=0;
119		ptype = 0;
120		i=PEM_read_bio(bp,&name,&header,&data,&len);
121		if (i == 0)
122			{
123			error=ERR_GET_REASON(ERR_peek_last_error());
124			if (error == PEM_R_NO_START_LINE)
125				{
126				ERR_clear_error();
127				break;
128				}
129			goto err;
130			}
131start:
132		if (	(strcmp(name,PEM_STRING_X509) == 0) ||
133			(strcmp(name,PEM_STRING_X509_OLD) == 0))
134			{
135			d2i=(D2I_OF(void))d2i_X509;
136			if (xi->x509 != NULL)
137				{
138				if (!sk_X509_INFO_push(ret,xi)) goto err;
139				if ((xi=X509_INFO_new()) == NULL) goto err;
140				goto start;
141				}
142			pp=&(xi->x509);
143			}
144		else if ((strcmp(name,PEM_STRING_X509_TRUSTED) == 0))
145			{
146			d2i=(D2I_OF(void))d2i_X509_AUX;
147			if (xi->x509 != NULL)
148				{
149				if (!sk_X509_INFO_push(ret,xi)) goto err;
150				if ((xi=X509_INFO_new()) == NULL) goto err;
151				goto start;
152				}
153			pp=&(xi->x509);
154			}
155		else if (strcmp(name,PEM_STRING_X509_CRL) == 0)
156			{
157			d2i=(D2I_OF(void))d2i_X509_CRL;
158			if (xi->crl != NULL)
159				{
160				if (!sk_X509_INFO_push(ret,xi)) goto err;
161				if ((xi=X509_INFO_new()) == NULL) goto err;
162				goto start;
163				}
164			pp=&(xi->crl);
165			}
166		else
167#ifndef OPENSSL_NO_RSA
168			if (strcmp(name,PEM_STRING_RSA) == 0)
169			{
170			if (xi->x_pkey != NULL)
171				{
172				if (!sk_X509_INFO_push(ret,xi)) goto err;
173				if ((xi=X509_INFO_new()) == NULL) goto err;
174				goto start;
175				}
176
177			xi->enc_data=NULL;
178			xi->enc_len=0;
179
180			xi->x_pkey=X509_PKEY_new();
181			ptype=EVP_PKEY_RSA;
182			pp=&xi->x_pkey->dec_pkey;
183			if ((int)strlen(header) > 10) /* assume encrypted */
184				raw=1;
185			}
186		else
187#endif
188#ifndef OPENSSL_NO_DSA
189			if (strcmp(name,PEM_STRING_DSA) == 0)
190			{
191			d2i=(D2I_OF(void))d2i_DSAPrivateKey;
192			if (xi->x_pkey != NULL)
193				{
194				if (!sk_X509_INFO_push(ret,xi)) goto err;
195				if ((xi=X509_INFO_new()) == NULL) goto err;
196				goto start;
197				}
198
199			xi->enc_data=NULL;
200			xi->enc_len=0;
201
202			xi->x_pkey=X509_PKEY_new();
203			ptype = EVP_PKEY_DSA;
204			pp=&xi->x_pkey->dec_pkey;
205			if ((int)strlen(header) > 10) /* assume encrypted */
206				raw=1;
207			}
208		else
209#endif
210#ifndef OPENSSL_NO_EC
211 			if (strcmp(name,PEM_STRING_ECPRIVATEKEY) == 0)
212 			{
213 				d2i=(D2I_OF(void))d2i_ECPrivateKey;
214 				if (xi->x_pkey != NULL)
215 				{
216 					if (!sk_X509_INFO_push(ret,xi)) goto err;
217 					if ((xi=X509_INFO_new()) == NULL) goto err;
218 						goto start;
219 				}
220
221 			xi->enc_data=NULL;
222 			xi->enc_len=0;
223
224 			xi->x_pkey=X509_PKEY_new();
225			ptype = EVP_PKEY_EC;
226 			pp=&xi->x_pkey->dec_pkey;
227 			if ((int)strlen(header) > 10) /* assume encrypted */
228 				raw=1;
229			}
230		else
231#endif
232			{
233			d2i=NULL;
234			pp=NULL;
235			}
236
237		if (d2i != NULL)
238			{
239			if (!raw)
240				{
241				EVP_CIPHER_INFO cipher;
242
243				if (!PEM_get_EVP_CIPHER_INFO(header,&cipher))
244					goto err;
245				if (!PEM_do_header(&cipher,data,&len,cb,u))
246					goto err;
247				p=data;
248				if (ptype)
249					{
250					if (!d2i_PrivateKey(ptype, pp, &p, len))
251						{
252						PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_ASN1_LIB);
253						goto err;
254						}
255					}
256				else if (d2i(pp,&p,len) == NULL)
257					{
258					PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_ASN1_LIB);
259					goto err;
260					}
261				}
262			else
263				{ /* encrypted RSA data */
264				if (!PEM_get_EVP_CIPHER_INFO(header,
265					&xi->enc_cipher)) goto err;
266				xi->enc_data=(char *)data;
267				xi->enc_len=(int)len;
268				data=NULL;
269				}
270			}
271		else	{
272			/* unknown */
273			}
274		if (name != NULL) OPENSSL_free(name);
275		if (header != NULL) OPENSSL_free(header);
276		if (data != NULL) OPENSSL_free(data);
277		name=NULL;
278		header=NULL;
279		data=NULL;
280		}
281
282	/* if the last one hasn't been pushed yet and there is anything
283	 * in it then add it to the stack ...
284	 */
285	if ((xi->x509 != NULL) || (xi->crl != NULL) ||
286		(xi->x_pkey != NULL) || (xi->enc_data != NULL))
287		{
288		if (!sk_X509_INFO_push(ret,xi)) goto err;
289		xi=NULL;
290		}
291	ok=1;
292err:
293	if (xi != NULL) X509_INFO_free(xi);
294	if (!ok)
295		{
296		for (i=0; ((int)i)<sk_X509_INFO_num(ret); i++)
297			{
298			xi=sk_X509_INFO_value(ret,i);
299			X509_INFO_free(xi);
300			}
301		if (ret != sk) sk_X509_INFO_free(ret);
302		ret=NULL;
303		}
304
305	if (name != NULL) OPENSSL_free(name);
306	if (header != NULL) OPENSSL_free(header);
307	if (data != NULL) OPENSSL_free(data);
308	return(ret);
309	}
310
311
312/* A TJH addition */
313int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
314	     unsigned char *kstr, int klen, pem_password_cb *cb, void *u)
315	{
316	EVP_CIPHER_CTX ctx;
317	int i,ret=0;
318	unsigned char *data=NULL;
319	const char *objstr=NULL;
320	char buf[PEM_BUFSIZE];
321	unsigned char *iv=NULL;
322
323	if (enc != NULL)
324		{
325		objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
326		if (objstr == NULL)
327			{
328			PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
329			goto err;
330			}
331		}
332
333	/* now for the fun part ... if we have a private key then
334	 * we have to be able to handle a not-yet-decrypted key
335	 * being written out correctly ... if it is decrypted or
336	 * it is non-encrypted then we use the base code
337	 */
338	if (xi->x_pkey!=NULL)
339		{
340		if ( (xi->enc_data!=NULL) && (xi->enc_len>0) )
341			{
342			if (enc == NULL)
343				{
344				PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_CIPHER_IS_NULL);
345				goto err;
346				}
347
348			/* copy from weirdo names into more normal things */
349			iv=xi->enc_cipher.iv;
350			data=(unsigned char *)xi->enc_data;
351			i=xi->enc_len;
352
353			/* we take the encryption data from the
354			 * internal stuff rather than what the
355			 * user has passed us ... as we have to
356			 * match exactly for some strange reason
357			 */
358			objstr=OBJ_nid2sn(
359				EVP_CIPHER_nid(xi->enc_cipher.cipher));
360			if (objstr == NULL)
361				{
362				PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
363				goto err;
364				}
365
366			/* create the right magic header stuff */
367			OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf);
368			buf[0]='\0';
369			PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
370			PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);
371
372			/* use the normal code to write things out */
373			i=PEM_write_bio(bp,PEM_STRING_RSA,buf,data,i);
374			if (i <= 0) goto err;
375			}
376		else
377			{
378			/* Add DSA/DH */
379#ifndef OPENSSL_NO_RSA
380			/* normal optionally encrypted stuff */
381			if (PEM_write_bio_RSAPrivateKey(bp,
382				xi->x_pkey->dec_pkey->pkey.rsa,
383				enc,kstr,klen,cb,u)<=0)
384				goto err;
385#endif
386			}
387		}
388
389	/* if we have a certificate then write it out now */
390	if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp,xi->x509) <= 0))
391		goto err;
392
393	/* we are ignoring anything else that is loaded into the X509_INFO
394	 * structure for the moment ... as I don't need it so I'm not
395	 * coding it here and Eric can do it when this makes it into the
396	 * base library --tjh
397	 */
398
399	ret=1;
400
401err:
402	OPENSSL_cleanse((char *)&ctx,sizeof(ctx));
403	OPENSSL_cleanse(buf,PEM_BUFSIZE);
404	return(ret);
405	}
406