pem_info.c revision 331638 
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,
75                                        pem_password_cb *cb, void *u)
76{
77    BIO *b;
78    STACK_OF(X509_INFO) *ret;
79
80    if ((b = BIO_new(BIO_s_file())) == NULL) {
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,
92                                            pem_password_cb *cb, void *u)
93{
94    X509_INFO *xi = NULL;
95    char *name = NULL, *header = NULL;
96    void *pp;
97    unsigned char *data = NULL;
98    const unsigned char *p;
99    long len, error = 0;
100    int ok = 0;
101    STACK_OF(X509_INFO) *ret = NULL;
102    unsigned int i, raw, ptype;
103    d2i_of_void *d2i = 0;
104
105    if (sk == NULL) {
106        if ((ret = sk_X509_INFO_new_null()) == NULL) {
107            PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, ERR_R_MALLOC_FAILURE);
108            goto err;
109        }
110    } else
111        ret = sk;
112
113    if ((xi = X509_INFO_new()) == NULL)
114        goto err;
115    for (;;) {
116        raw = 0;
117        ptype = 0;
118        i = PEM_read_bio(bp, &name, &header, &data, &len);
119        if (i == 0) {
120            error = ERR_GET_REASON(ERR_peek_last_error());
121            if (error == PEM_R_NO_START_LINE) {
122                ERR_clear_error();
123                break;
124            }
125            goto err;
126        }
127 start:
128        if ((strcmp(name, PEM_STRING_X509) == 0) ||
129            (strcmp(name, PEM_STRING_X509_OLD) == 0)) {
130            d2i = (D2I_OF(void)) d2i_X509;
131            if (xi->x509 != NULL) {
132                if (!sk_X509_INFO_push(ret, xi))
133                    goto err;
134                if ((xi = X509_INFO_new()) == NULL)
135                    goto err;
136                goto start;
137            }
138            pp = &(xi->x509);
139        } else if ((strcmp(name, PEM_STRING_X509_TRUSTED) == 0)) {
140            d2i = (D2I_OF(void)) d2i_X509_AUX;
141            if (xi->x509 != NULL) {
142                if (!sk_X509_INFO_push(ret, xi))
143                    goto err;
144                if ((xi = X509_INFO_new()) == NULL)
145                    goto err;
146                goto start;
147            }
148            pp = &(xi->x509);
149        } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) {
150            d2i = (D2I_OF(void)) d2i_X509_CRL;
151            if (xi->crl != NULL) {
152                if (!sk_X509_INFO_push(ret, xi))
153                    goto err;
154                if ((xi = X509_INFO_new()) == NULL)
155                    goto err;
156                goto start;
157            }
158            pp = &(xi->crl);
159        } else
160#ifndef OPENSSL_NO_RSA
161        if (strcmp(name, PEM_STRING_RSA) == 0) {
162            d2i = (D2I_OF(void)) d2i_RSAPrivateKey;
163            if (xi->x_pkey != NULL) {
164                if (!sk_X509_INFO_push(ret, xi))
165                    goto err;
166                if ((xi = X509_INFO_new()) == NULL)
167                    goto err;
168                goto start;
169            }
170
171            xi->enc_data = NULL;
172            xi->enc_len = 0;
173
174            xi->x_pkey = X509_PKEY_new();
175            if (xi->x_pkey == NULL)
176                goto err;
177            ptype = EVP_PKEY_RSA;
178            pp = &xi->x_pkey->dec_pkey;
179            if ((int)strlen(header) > 10) /* assume encrypted */
180                raw = 1;
181        } else
182#endif
183#ifndef OPENSSL_NO_DSA
184        if (strcmp(name, PEM_STRING_DSA) == 0) {
185            d2i = (D2I_OF(void)) d2i_DSAPrivateKey;
186            if (xi->x_pkey != NULL) {
187                if (!sk_X509_INFO_push(ret, xi))
188                    goto err;
189                if ((xi = X509_INFO_new()) == NULL)
190                    goto err;
191                goto start;
192            }
193
194            xi->enc_data = NULL;
195            xi->enc_len = 0;
196
197            xi->x_pkey = X509_PKEY_new();
198            if (xi->x_pkey == NULL)
199                goto err;
200            ptype = EVP_PKEY_DSA;
201            pp = &xi->x_pkey->dec_pkey;
202            if ((int)strlen(header) > 10) /* assume encrypted */
203                raw = 1;
204        } else
205#endif
206#ifndef OPENSSL_NO_EC
207        if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) {
208            d2i = (D2I_OF(void)) d2i_ECPrivateKey;
209            if (xi->x_pkey != NULL) {
210                if (!sk_X509_INFO_push(ret, xi))
211                    goto err;
212                if ((xi = X509_INFO_new()) == NULL)
213                    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 == NULL)
222                goto err;
223            ptype = EVP_PKEY_EC;
224            pp = &xi->x_pkey->dec_pkey;
225            if ((int)strlen(header) > 10) /* assume encrypted */
226                raw = 1;
227        } else
228#endif
229        {
230            d2i = NULL;
231            pp = NULL;
232        }
233
234        if (d2i != NULL) {
235            if (!raw) {
236                EVP_CIPHER_INFO cipher;
237
238                if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
239                    goto err;
240                if (!PEM_do_header(&cipher, data, &len, cb, u))
241                    goto err;
242                p = data;
243                if (ptype) {
244                    if (!d2i_PrivateKey(ptype, pp, &p, len)) {
245                        PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, ERR_R_ASN1_LIB);
246                        goto err;
247                    }
248                } else if (d2i(pp, &p, len) == NULL) {
249                    PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, ERR_R_ASN1_LIB);
250                    goto err;
251                }
252            } else {            /* encrypted RSA data */
253                if (!PEM_get_EVP_CIPHER_INFO(header, &xi->enc_cipher))
254                    goto err;
255                xi->enc_data = (char *)data;
256                xi->enc_len = (int)len;
257                data = NULL;
258            }
259        } else {
260            /* unknown */
261        }
262        if (name != NULL)
263            OPENSSL_free(name);
264        if (header != NULL)
265            OPENSSL_free(header);
266        if (data != NULL)
267            OPENSSL_free(data);
268        name = NULL;
269        header = NULL;
270        data = NULL;
271    }
272
273    /*
274     * if the last one hasn't been pushed yet and there is anything in it
275     * then add it to the stack ...
276     */
277    if ((xi->x509 != NULL) || (xi->crl != NULL) ||
278        (xi->x_pkey != NULL) || (xi->enc_data != NULL)) {
279        if (!sk_X509_INFO_push(ret, xi))
280            goto err;
281        xi = NULL;
282    }
283    ok = 1;
284 err:
285    if (xi != NULL)
286        X509_INFO_free(xi);
287    if (!ok) {
288        for (i = 0; ((int)i) < sk_X509_INFO_num(ret); i++) {
289            xi = sk_X509_INFO_value(ret, i);
290            X509_INFO_free(xi);
291        }
292        if (ret != sk)
293            sk_X509_INFO_free(ret);
294        ret = NULL;
295    }
296
297    if (name != NULL)
298        OPENSSL_free(name);
299    if (header != NULL)
300        OPENSSL_free(header);
301    if (data != NULL)
302        OPENSSL_free(data);
303    return (ret);
304}
305
306/* A TJH addition */
307int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
308                            unsigned char *kstr, int klen,
309                            pem_password_cb *cb, void *u)
310{
311    EVP_CIPHER_CTX ctx;
312    int i, ret = 0;
313    unsigned char *data = NULL;
314    const char *objstr = NULL;
315    char buf[PEM_BUFSIZE];
316    unsigned char *iv = NULL;
317
318    if (enc != NULL) {
319        objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
320        if (objstr == NULL) {
321            PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
322            goto err;
323        }
324    }
325
326    /*
327     * now for the fun part ... if we have a private key then we have to be
328     * able to handle a not-yet-decrypted key being written out correctly ...
329     * if it is decrypted or it is non-encrypted then we use the base code
330     */
331    if (xi->x_pkey != NULL) {
332        if ((xi->enc_data != NULL) && (xi->enc_len > 0)) {
333            if (enc == NULL) {
334                PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO, PEM_R_CIPHER_IS_NULL);
335                goto err;
336            }
337
338            /* copy from weirdo names into more normal things */
339            iv = xi->enc_cipher.iv;
340            data = (unsigned char *)xi->enc_data;
341            i = xi->enc_len;
342
343            /*
344             * we take the encryption data from the internal stuff rather
345             * than what the user has passed us ... as we have to match
346             * exactly for some strange reason
347             */
348            objstr = OBJ_nid2sn(EVP_CIPHER_nid(xi->enc_cipher.cipher));
349            if (objstr == NULL) {
350                PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,
351                       PEM_R_UNSUPPORTED_CIPHER);
352                goto err;
353            }
354
355            /* create the right magic header stuff */
356            OPENSSL_assert(strlen(objstr) + 23 + 2 * enc->iv_len + 13 <=
357                           sizeof(buf));
358            buf[0] = '\0';
359            PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
360            PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv);
361
362            /* use the normal code to write things out */
363            i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i);
364            if (i <= 0)
365                goto err;
366        } else {
367            /* Add DSA/DH */
368#ifndef OPENSSL_NO_RSA
369            /* normal optionally encrypted stuff */
370            if (PEM_write_bio_RSAPrivateKey(bp,
371                                            xi->x_pkey->dec_pkey->pkey.rsa,
372                                            enc, kstr, klen, cb, u) <= 0)
373                goto err;
374#endif
375        }
376    }
377
378    /* if we have a certificate then write it out now */
379    if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0))
380        goto err;
381
382    /*
383     * we are ignoring anything else that is loaded into the X509_INFO
384     * structure for the moment ... as I don't need it so I'm not coding it
385     * here and Eric can do it when this makes it into the base library --tjh
386     */
387
388    ret = 1;
389
390 err:
391    OPENSSL_cleanse((char *)&ctx, sizeof(ctx));
392    OPENSSL_cleanse(buf, PEM_BUFSIZE);
393    return (ret);
394}
395