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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 <openssl/pem.h>
60 
61 #include <assert.h>
62 #include <stdio.h>
63 #include <string.h>
64 
65 #include <openssl/buf.h>
66 #include <openssl/dsa.h>
67 #include <openssl/err.h>
68 #include <openssl/evp.h>
69 #include <openssl/mem.h>
70 #include <openssl/obj.h>
71 #include <openssl/rsa.h>
72 #include <openssl/x509.h>
73 
74 #ifndef OPENSSL_NO_FP_API
STACK_OF(X509_INFO)75 STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk,
76                                         pem_password_cb *cb, void *u)
77 {
78     BIO *b;
79     STACK_OF(X509_INFO) *ret;
80 
81     if ((b = BIO_new(BIO_s_file())) == NULL) {
82         OPENSSL_PUT_ERROR(PEM, ERR_R_BUF_LIB);
83         return (0);
84     }
85     BIO_set_fp(b, fp, BIO_NOCLOSE);
86     ret = PEM_X509_INFO_read_bio(b, sk, cb, u);
87     BIO_free(b);
88     return (ret);
89 }
90 #endif
91 
STACK_OF(X509_INFO)92 STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk,
93                                             pem_password_cb *cb, void *u)
94 {
95     X509_INFO *xi = NULL;
96     char *name = NULL, *header = NULL;
97     void *pp;
98     unsigned char *data = NULL;
99     const unsigned char *p;
100     long len, error = 0;
101     int ok = 0;
102     STACK_OF(X509_INFO) *ret = NULL;
103     unsigned int i, raw, ptype;
104     d2i_of_void *d2i = 0;
105 
106     if (sk == NULL) {
107         if ((ret = sk_X509_INFO_new_null()) == NULL) {
108             OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE);
109             goto err;
110         }
111     } else
112         ret = sk;
113 
114     if ((xi = X509_INFO_new()) == NULL)
115         goto err;
116     for (;;) {
117         raw = 0;
118         ptype = 0;
119         i = PEM_read_bio(bp, &name, &header, &data, &len);
120         if (i == 0) {
121             error = ERR_GET_REASON(ERR_peek_last_error());
122             if (error == PEM_R_NO_START_LINE) {
123                 ERR_clear_error();
124                 break;
125             }
126             goto err;
127         }
128  start:
129         if ((strcmp(name, PEM_STRING_X509) == 0) ||
130             (strcmp(name, PEM_STRING_X509_OLD) == 0)) {
131             d2i = (D2I_OF(void)) d2i_X509;
132             if (xi->x509 != NULL) {
133                 if (!sk_X509_INFO_push(ret, xi))
134                     goto err;
135                 if ((xi = X509_INFO_new()) == NULL)
136                     goto err;
137                 goto start;
138             }
139             pp = &(xi->x509);
140         } else if ((strcmp(name, PEM_STRING_X509_TRUSTED) == 0)) {
141             d2i = (D2I_OF(void)) d2i_X509_AUX;
142             if (xi->x509 != NULL) {
143                 if (!sk_X509_INFO_push(ret, xi))
144                     goto err;
145                 if ((xi = X509_INFO_new()) == NULL)
146                     goto err;
147                 goto start;
148             }
149             pp = &(xi->x509);
150         } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) {
151             d2i = (D2I_OF(void)) d2i_X509_CRL;
152             if (xi->crl != NULL) {
153                 if (!sk_X509_INFO_push(ret, xi))
154                     goto err;
155                 if ((xi = X509_INFO_new()) == NULL)
156                     goto err;
157                 goto start;
158             }
159             pp = &(xi->crl);
160         } else if (strcmp(name, PEM_STRING_RSA) == 0) {
161             d2i = (D2I_OF(void)) d2i_RSAPrivateKey;
162             if (xi->x_pkey != NULL) {
163                 if (!sk_X509_INFO_push(ret, xi))
164                     goto err;
165                 if ((xi = X509_INFO_new()) == NULL)
166                     goto err;
167                 goto start;
168             }
169 
170             xi->enc_data = NULL;
171             xi->enc_len = 0;
172 
173             xi->x_pkey = X509_PKEY_new();
174             ptype = EVP_PKEY_RSA;
175             pp = &xi->x_pkey->dec_pkey;
176             if ((int)strlen(header) > 10) /* assume encrypted */
177                 raw = 1;
178         } else
179 #ifndef OPENSSL_NO_DSA
180         if (strcmp(name, PEM_STRING_DSA) == 0) {
181             d2i = (D2I_OF(void)) d2i_DSAPrivateKey;
182             if (xi->x_pkey != NULL) {
183                 if (!sk_X509_INFO_push(ret, xi))
184                     goto err;
185                 if ((xi = X509_INFO_new()) == NULL)
186                     goto err;
187                 goto start;
188             }
189 
190             xi->enc_data = NULL;
191             xi->enc_len = 0;
192 
193             xi->x_pkey = X509_PKEY_new();
194             ptype = EVP_PKEY_DSA;
195             pp = &xi->x_pkey->dec_pkey;
196             if ((int)strlen(header) > 10) /* assume encrypted */
197                 raw = 1;
198         } else
199 #endif
200         if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) {
201             d2i = (D2I_OF(void)) d2i_ECPrivateKey;
202             if (xi->x_pkey != NULL) {
203                 if (!sk_X509_INFO_push(ret, xi))
204                     goto err;
205                 if ((xi = X509_INFO_new()) == NULL)
206                     goto err;
207                 goto start;
208             }
209 
210             xi->enc_data = NULL;
211             xi->enc_len = 0;
212 
213             xi->x_pkey = X509_PKEY_new();
214             ptype = EVP_PKEY_EC;
215             pp = &xi->x_pkey->dec_pkey;
216             if ((int)strlen(header) > 10) /* assume encrypted */
217                 raw = 1;
218         } else {
219             d2i = NULL;
220             pp = NULL;
221         }
222 
223         if (d2i != NULL) {
224             if (!raw) {
225                 EVP_CIPHER_INFO cipher;
226 
227                 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
228                     goto err;
229                 if (!PEM_do_header(&cipher, data, &len, cb, u))
230                     goto err;
231                 p = data;
232                 if (ptype) {
233                     if (!d2i_PrivateKey(ptype, pp, &p, len)) {
234                         OPENSSL_PUT_ERROR(PEM, ERR_R_ASN1_LIB);
235                         goto err;
236                     }
237                 } else if (d2i(pp, &p, len) == NULL) {
238                     OPENSSL_PUT_ERROR(PEM, ERR_R_ASN1_LIB);
239                     goto err;
240                 }
241             } else {            /* encrypted RSA data */
242                 if (!PEM_get_EVP_CIPHER_INFO(header, &xi->enc_cipher))
243                     goto err;
244                 xi->enc_data = (char *)data;
245                 xi->enc_len = (int)len;
246                 data = NULL;
247             }
248         } else {
249             /* unknown */
250         }
251         if (name != NULL)
252             OPENSSL_free(name);
253         if (header != NULL)
254             OPENSSL_free(header);
255         if (data != NULL)
256             OPENSSL_free(data);
257         name = NULL;
258         header = NULL;
259         data = NULL;
260     }
261 
262     /*
263      * if the last one hasn't been pushed yet and there is anything in it
264      * then add it to the stack ...
265      */
266     if ((xi->x509 != NULL) || (xi->crl != NULL) ||
267         (xi->x_pkey != NULL) || (xi->enc_data != NULL)) {
268         if (!sk_X509_INFO_push(ret, xi))
269             goto err;
270         xi = NULL;
271     }
272     ok = 1;
273  err:
274     if (xi != NULL)
275         X509_INFO_free(xi);
276     if (!ok) {
277         for (i = 0; i < sk_X509_INFO_num(ret); i++) {
278             xi = sk_X509_INFO_value(ret, i);
279             X509_INFO_free(xi);
280         }
281         if (ret != sk)
282             sk_X509_INFO_free(ret);
283         ret = NULL;
284     }
285 
286     if (name != NULL)
287         OPENSSL_free(name);
288     if (header != NULL)
289         OPENSSL_free(header);
290     if (data != NULL)
291         OPENSSL_free(data);
292     return (ret);
293 }
294 
295 /* A TJH addition */
PEM_X509_INFO_write_bio(BIO * bp,X509_INFO * xi,EVP_CIPHER * enc,unsigned char * kstr,int klen,pem_password_cb * cb,void * u)296 int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
297                             unsigned char *kstr, int klen,
298                             pem_password_cb *cb, void *u)
299 {
300     EVP_CIPHER_CTX ctx;
301     int i, ret = 0;
302     unsigned char *data = NULL;
303     const char *objstr = NULL;
304     char buf[PEM_BUFSIZE];
305     unsigned char *iv = NULL;
306     unsigned iv_len = 0;
307 
308     if (enc != NULL) {
309         iv_len = EVP_CIPHER_iv_length(enc);
310         objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
311         if (objstr == NULL) {
312             OPENSSL_PUT_ERROR(PEM, PEM_R_UNSUPPORTED_CIPHER);
313             goto err;
314         }
315     }
316 
317     /*
318      * now for the fun part ... if we have a private key then we have to be
319      * able to handle a not-yet-decrypted key being written out correctly ...
320      * if it is decrypted or it is non-encrypted then we use the base code
321      */
322     if (xi->x_pkey != NULL) {
323         if ((xi->enc_data != NULL) && (xi->enc_len > 0)) {
324             if (enc == NULL) {
325                 OPENSSL_PUT_ERROR(PEM, PEM_R_CIPHER_IS_NULL);
326                 goto err;
327             }
328 
329             /* copy from weirdo names into more normal things */
330             iv = xi->enc_cipher.iv;
331             data = (unsigned char *)xi->enc_data;
332             i = xi->enc_len;
333 
334             /*
335              * we take the encryption data from the internal stuff rather
336              * than what the user has passed us ... as we have to match
337              * exactly for some strange reason
338              */
339             objstr = OBJ_nid2sn(EVP_CIPHER_nid(xi->enc_cipher.cipher));
340             if (objstr == NULL) {
341                 OPENSSL_PUT_ERROR(PEM, PEM_R_UNSUPPORTED_CIPHER);
342                 goto err;
343             }
344 
345             /* create the right magic header stuff */
346             assert(strlen(objstr) + 23 + 2 * iv_len + 13 <= sizeof buf);
347             buf[0] = '\0';
348             PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
349             PEM_dek_info(buf, objstr, iv_len, (char *)iv);
350 
351             /* use the normal code to write things out */
352             i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i);
353             if (i <= 0)
354                 goto err;
355         } else {
356             /* Add DSA/DH */
357             /* normal optionally encrypted stuff */
358             if (PEM_write_bio_RSAPrivateKey(bp,
359                                             xi->x_pkey->dec_pkey->pkey.rsa,
360                                             enc, kstr, klen, cb, u) <= 0)
361                 goto err;
362         }
363     }
364 
365     /* if we have a certificate then write it out now */
366     if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0))
367         goto err;
368 
369     /*
370      * we are ignoring anything else that is loaded into the X509_INFO
371      * structure for the moment ... as I don't need it so I'm not coding it
372      * here and Eric can do it when this makes it into the base library --tjh
373      */
374 
375     ret = 1;
376 
377  err:
378     OPENSSL_cleanse((char *)&ctx, sizeof(ctx));
379     OPENSSL_cleanse(buf, PEM_BUFSIZE);
380     return (ret);
381 }
382