1*de0e0e4dSAntonio Huete Jimenez /* $OpenBSD: pem_lib.c,v 1.51 2022/07/31 09:48:27 tb Exp $ */
2f5b1c8a1SJohn Marino /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3f5b1c8a1SJohn Marino * All rights reserved.
4f5b1c8a1SJohn Marino *
5f5b1c8a1SJohn Marino * This package is an SSL implementation written
6f5b1c8a1SJohn Marino * by Eric Young (eay@cryptsoft.com).
7f5b1c8a1SJohn Marino * The implementation was written so as to conform with Netscapes SSL.
8f5b1c8a1SJohn Marino *
9f5b1c8a1SJohn Marino * This library is free for commercial and non-commercial use as long as
10f5b1c8a1SJohn Marino * the following conditions are aheared to. The following conditions
11f5b1c8a1SJohn Marino * apply to all code found in this distribution, be it the RC4, RSA,
12f5b1c8a1SJohn Marino * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13f5b1c8a1SJohn Marino * included with this distribution is covered by the same copyright terms
14f5b1c8a1SJohn Marino * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15f5b1c8a1SJohn Marino *
16f5b1c8a1SJohn Marino * Copyright remains Eric Young's, and as such any Copyright notices in
17f5b1c8a1SJohn Marino * the code are not to be removed.
18f5b1c8a1SJohn Marino * If this package is used in a product, Eric Young should be given attribution
19f5b1c8a1SJohn Marino * as the author of the parts of the library used.
20f5b1c8a1SJohn Marino * This can be in the form of a textual message at program startup or
21f5b1c8a1SJohn Marino * in documentation (online or textual) provided with the package.
22f5b1c8a1SJohn Marino *
23f5b1c8a1SJohn Marino * Redistribution and use in source and binary forms, with or without
24f5b1c8a1SJohn Marino * modification, are permitted provided that the following conditions
25f5b1c8a1SJohn Marino * are met:
26f5b1c8a1SJohn Marino * 1. Redistributions of source code must retain the copyright
27f5b1c8a1SJohn Marino * notice, this list of conditions and the following disclaimer.
28f5b1c8a1SJohn Marino * 2. Redistributions in binary form must reproduce the above copyright
29f5b1c8a1SJohn Marino * notice, this list of conditions and the following disclaimer in the
30f5b1c8a1SJohn Marino * documentation and/or other materials provided with the distribution.
31f5b1c8a1SJohn Marino * 3. All advertising materials mentioning features or use of this software
32f5b1c8a1SJohn Marino * must display the following acknowledgement:
33f5b1c8a1SJohn Marino * "This product includes cryptographic software written by
34f5b1c8a1SJohn Marino * Eric Young (eay@cryptsoft.com)"
35f5b1c8a1SJohn Marino * The word 'cryptographic' can be left out if the rouines from the library
36f5b1c8a1SJohn Marino * being used are not cryptographic related :-).
37f5b1c8a1SJohn Marino * 4. If you include any Windows specific code (or a derivative thereof) from
38f5b1c8a1SJohn Marino * the apps directory (application code) you must include an acknowledgement:
39f5b1c8a1SJohn Marino * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40f5b1c8a1SJohn Marino *
41f5b1c8a1SJohn Marino * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42f5b1c8a1SJohn Marino * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43f5b1c8a1SJohn Marino * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44f5b1c8a1SJohn Marino * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45f5b1c8a1SJohn Marino * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46f5b1c8a1SJohn Marino * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47f5b1c8a1SJohn Marino * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48f5b1c8a1SJohn Marino * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49f5b1c8a1SJohn Marino * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50f5b1c8a1SJohn Marino * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51f5b1c8a1SJohn Marino * SUCH DAMAGE.
52f5b1c8a1SJohn Marino *
53f5b1c8a1SJohn Marino * The licence and distribution terms for any publically available version or
54f5b1c8a1SJohn Marino * derivative of this code cannot be changed. i.e. this code cannot simply be
55f5b1c8a1SJohn Marino * copied and put under another distribution licence
56f5b1c8a1SJohn Marino * [including the GNU Public Licence.]
57f5b1c8a1SJohn Marino */
58f5b1c8a1SJohn Marino
59f5b1c8a1SJohn Marino #include <ctype.h>
60f5b1c8a1SJohn Marino #include <stdio.h>
61f5b1c8a1SJohn Marino #include <stdlib.h>
62f5b1c8a1SJohn Marino #include <string.h>
63f5b1c8a1SJohn Marino
64f5b1c8a1SJohn Marino #include <openssl/opensslconf.h>
65f5b1c8a1SJohn Marino
66f5b1c8a1SJohn Marino #include <openssl/buffer.h>
67f5b1c8a1SJohn Marino #include <openssl/err.h>
68f5b1c8a1SJohn Marino #include <openssl/evp.h>
69f5b1c8a1SJohn Marino #include <openssl/objects.h>
70f5b1c8a1SJohn Marino #include <openssl/pem.h>
71f5b1c8a1SJohn Marino #include <openssl/pkcs12.h>
72f5b1c8a1SJohn Marino #include <openssl/x509.h>
73f5b1c8a1SJohn Marino
74f5b1c8a1SJohn Marino #ifndef OPENSSL_NO_DES
75f5b1c8a1SJohn Marino #include <openssl/des.h>
76f5b1c8a1SJohn Marino #endif
77f5b1c8a1SJohn Marino #ifndef OPENSSL_NO_ENGINE
78f5b1c8a1SJohn Marino #include <openssl/engine.h>
79f5b1c8a1SJohn Marino #endif
80f5b1c8a1SJohn Marino
81f5b1c8a1SJohn Marino #include "asn1_locl.h"
82*de0e0e4dSAntonio Huete Jimenez #include "evp_locl.h"
83f5b1c8a1SJohn Marino
84f5b1c8a1SJohn Marino #define MIN_LENGTH 4
85f5b1c8a1SJohn Marino
86f5b1c8a1SJohn Marino static int load_iv(char **fromp, unsigned char *to, int num);
87f5b1c8a1SJohn Marino static int check_pem(const char *nm, const char *name);
88f5b1c8a1SJohn Marino int pem_check_suffix(const char *pem_str, const char *suffix);
89f5b1c8a1SJohn Marino
90f5b1c8a1SJohn Marino /* XXX LSSL ABI XXX return value and `num' ought to be size_t */
91f5b1c8a1SJohn Marino int
PEM_def_callback(char * buf,int num,int w,void * key)92f5b1c8a1SJohn Marino PEM_def_callback(char *buf, int num, int w, void *key)
93f5b1c8a1SJohn Marino {
94f5b1c8a1SJohn Marino size_t l;
95f5b1c8a1SJohn Marino int i;
96f5b1c8a1SJohn Marino const char *prompt;
97f5b1c8a1SJohn Marino
98f5b1c8a1SJohn Marino if (num < 0)
99f5b1c8a1SJohn Marino return -1;
100f5b1c8a1SJohn Marino
101f5b1c8a1SJohn Marino if (key) {
102f5b1c8a1SJohn Marino l = strlen(key);
103f5b1c8a1SJohn Marino if (l > (size_t)num)
104f5b1c8a1SJohn Marino l = (size_t)num;
105f5b1c8a1SJohn Marino memcpy(buf, key, l);
106f5b1c8a1SJohn Marino return (int)l;
107f5b1c8a1SJohn Marino }
108f5b1c8a1SJohn Marino
109f5b1c8a1SJohn Marino prompt = EVP_get_pw_prompt();
110f5b1c8a1SJohn Marino if (prompt == NULL)
111f5b1c8a1SJohn Marino prompt = "Enter PEM pass phrase:";
112f5b1c8a1SJohn Marino
113f5b1c8a1SJohn Marino for (;;) {
114f5b1c8a1SJohn Marino i = EVP_read_pw_string_min(buf, MIN_LENGTH, num, prompt, w);
115f5b1c8a1SJohn Marino if (i != 0) {
11672c33676SMaxim Ag PEMerror(PEM_R_PROBLEMS_GETTING_PASSWORD);
117f5b1c8a1SJohn Marino memset(buf, 0, num);
118f5b1c8a1SJohn Marino return (-1);
119f5b1c8a1SJohn Marino }
120f5b1c8a1SJohn Marino l = strlen(buf);
121f5b1c8a1SJohn Marino if (l < MIN_LENGTH) {
122f5b1c8a1SJohn Marino fprintf(stderr, "phrase is too short, "
123f5b1c8a1SJohn Marino "needs to be at least %zu chars\n",
124f5b1c8a1SJohn Marino (size_t)MIN_LENGTH);
125f5b1c8a1SJohn Marino } else
126f5b1c8a1SJohn Marino break;
127f5b1c8a1SJohn Marino }
128f5b1c8a1SJohn Marino return (int)l;
129f5b1c8a1SJohn Marino }
130f5b1c8a1SJohn Marino
131f5b1c8a1SJohn Marino void
PEM_proc_type(char * buf,int type)132f5b1c8a1SJohn Marino PEM_proc_type(char *buf, int type)
133f5b1c8a1SJohn Marino {
134f5b1c8a1SJohn Marino const char *str;
135f5b1c8a1SJohn Marino
136f5b1c8a1SJohn Marino if (type == PEM_TYPE_ENCRYPTED)
137f5b1c8a1SJohn Marino str = "ENCRYPTED";
138f5b1c8a1SJohn Marino else if (type == PEM_TYPE_MIC_CLEAR)
139f5b1c8a1SJohn Marino str = "MIC-CLEAR";
140f5b1c8a1SJohn Marino else if (type == PEM_TYPE_MIC_ONLY)
141f5b1c8a1SJohn Marino str = "MIC-ONLY";
142f5b1c8a1SJohn Marino else
143f5b1c8a1SJohn Marino str = "BAD-TYPE";
144f5b1c8a1SJohn Marino
145f5b1c8a1SJohn Marino strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE);
146f5b1c8a1SJohn Marino strlcat(buf, str, PEM_BUFSIZE);
147f5b1c8a1SJohn Marino strlcat(buf, "\n", PEM_BUFSIZE);
148f5b1c8a1SJohn Marino }
149f5b1c8a1SJohn Marino
150f5b1c8a1SJohn Marino void
PEM_dek_info(char * buf,const char * type,int len,char * str)151f5b1c8a1SJohn Marino PEM_dek_info(char *buf, const char *type, int len, char *str)
152f5b1c8a1SJohn Marino {
153f5b1c8a1SJohn Marino static const unsigned char map[17] = "0123456789ABCDEF";
154f5b1c8a1SJohn Marino long i;
155f5b1c8a1SJohn Marino int j;
156f5b1c8a1SJohn Marino
157f5b1c8a1SJohn Marino strlcat(buf, "DEK-Info: ", PEM_BUFSIZE);
158f5b1c8a1SJohn Marino strlcat(buf, type, PEM_BUFSIZE);
159f5b1c8a1SJohn Marino strlcat(buf, ",", PEM_BUFSIZE);
160f5b1c8a1SJohn Marino j = strlen(buf);
161f5b1c8a1SJohn Marino if (j + (len * 2) + 1 > PEM_BUFSIZE)
162f5b1c8a1SJohn Marino return;
163f5b1c8a1SJohn Marino for (i = 0; i < len; i++) {
164f5b1c8a1SJohn Marino buf[j + i * 2] = map[(str[i] >> 4) & 0x0f];
165f5b1c8a1SJohn Marino buf[j + i * 2 + 1] = map[(str[i]) & 0x0f];
166f5b1c8a1SJohn Marino }
167f5b1c8a1SJohn Marino buf[j + i * 2] = '\n';
168f5b1c8a1SJohn Marino buf[j + i * 2 + 1] = '\0';
169f5b1c8a1SJohn Marino }
170f5b1c8a1SJohn Marino
171f5b1c8a1SJohn Marino void *
PEM_ASN1_read(d2i_of_void * d2i,const char * name,FILE * fp,void ** x,pem_password_cb * cb,void * u)172f5b1c8a1SJohn Marino PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
173f5b1c8a1SJohn Marino pem_password_cb *cb, void *u)
174f5b1c8a1SJohn Marino {
175f5b1c8a1SJohn Marino BIO *b;
176f5b1c8a1SJohn Marino void *ret;
177f5b1c8a1SJohn Marino
178f5b1c8a1SJohn Marino if ((b = BIO_new(BIO_s_file())) == NULL) {
17972c33676SMaxim Ag PEMerror(ERR_R_BUF_LIB);
180f5b1c8a1SJohn Marino return (0);
181f5b1c8a1SJohn Marino }
182f5b1c8a1SJohn Marino BIO_set_fp(b, fp, BIO_NOCLOSE);
183f5b1c8a1SJohn Marino ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u);
184f5b1c8a1SJohn Marino BIO_free(b);
185f5b1c8a1SJohn Marino return (ret);
186f5b1c8a1SJohn Marino }
187f5b1c8a1SJohn Marino
188f5b1c8a1SJohn Marino static int
check_pem(const char * nm,const char * name)189f5b1c8a1SJohn Marino check_pem(const char *nm, const char *name)
190f5b1c8a1SJohn Marino {
191f5b1c8a1SJohn Marino /* Normal matching nm and name */
192f5b1c8a1SJohn Marino if (!strcmp(nm, name))
193f5b1c8a1SJohn Marino return 1;
194f5b1c8a1SJohn Marino
195f5b1c8a1SJohn Marino /* Make PEM_STRING_EVP_PKEY match any private key */
196f5b1c8a1SJohn Marino
197f5b1c8a1SJohn Marino if (!strcmp(name, PEM_STRING_EVP_PKEY)) {
198f5b1c8a1SJohn Marino int slen;
199f5b1c8a1SJohn Marino const EVP_PKEY_ASN1_METHOD *ameth;
200f5b1c8a1SJohn Marino if (!strcmp(nm, PEM_STRING_PKCS8))
201f5b1c8a1SJohn Marino return 1;
202f5b1c8a1SJohn Marino if (!strcmp(nm, PEM_STRING_PKCS8INF))
203f5b1c8a1SJohn Marino return 1;
204f5b1c8a1SJohn Marino slen = pem_check_suffix(nm, "PRIVATE KEY");
205f5b1c8a1SJohn Marino if (slen > 0) {
206f5b1c8a1SJohn Marino /* NB: ENGINE implementations wont contain
207f5b1c8a1SJohn Marino * a deprecated old private key decode function
208f5b1c8a1SJohn Marino * so don't look for them.
209f5b1c8a1SJohn Marino */
210f5b1c8a1SJohn Marino ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
211f5b1c8a1SJohn Marino if (ameth && ameth->old_priv_decode)
212f5b1c8a1SJohn Marino return 1;
213f5b1c8a1SJohn Marino }
214f5b1c8a1SJohn Marino return 0;
215f5b1c8a1SJohn Marino }
216f5b1c8a1SJohn Marino
217f5b1c8a1SJohn Marino if (!strcmp(name, PEM_STRING_PARAMETERS)) {
218f5b1c8a1SJohn Marino int slen;
219f5b1c8a1SJohn Marino const EVP_PKEY_ASN1_METHOD *ameth;
220f5b1c8a1SJohn Marino slen = pem_check_suffix(nm, "PARAMETERS");
221f5b1c8a1SJohn Marino if (slen > 0) {
222f5b1c8a1SJohn Marino ENGINE *e;
223f5b1c8a1SJohn Marino ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
224f5b1c8a1SJohn Marino if (ameth) {
225f5b1c8a1SJohn Marino int r;
226f5b1c8a1SJohn Marino if (ameth->param_decode)
227f5b1c8a1SJohn Marino r = 1;
228f5b1c8a1SJohn Marino else
229f5b1c8a1SJohn Marino r = 0;
230f5b1c8a1SJohn Marino #ifndef OPENSSL_NO_ENGINE
231f5b1c8a1SJohn Marino ENGINE_finish(e);
232f5b1c8a1SJohn Marino #endif
233f5b1c8a1SJohn Marino return r;
234f5b1c8a1SJohn Marino }
235f5b1c8a1SJohn Marino }
236f5b1c8a1SJohn Marino return 0;
237f5b1c8a1SJohn Marino }
238f5b1c8a1SJohn Marino
239f5b1c8a1SJohn Marino /* Permit older strings */
240f5b1c8a1SJohn Marino
241f5b1c8a1SJohn Marino if (!strcmp(nm, PEM_STRING_X509_OLD) &&
242f5b1c8a1SJohn Marino !strcmp(name, PEM_STRING_X509))
243f5b1c8a1SJohn Marino return 1;
244f5b1c8a1SJohn Marino
245f5b1c8a1SJohn Marino if (!strcmp(nm, PEM_STRING_X509_REQ_OLD) &&
246f5b1c8a1SJohn Marino !strcmp(name, PEM_STRING_X509_REQ))
247f5b1c8a1SJohn Marino return 1;
248f5b1c8a1SJohn Marino
249f5b1c8a1SJohn Marino /* Allow normal certs to be read as trusted certs */
250f5b1c8a1SJohn Marino if (!strcmp(nm, PEM_STRING_X509) &&
251f5b1c8a1SJohn Marino !strcmp(name, PEM_STRING_X509_TRUSTED))
252f5b1c8a1SJohn Marino return 1;
253f5b1c8a1SJohn Marino
254f5b1c8a1SJohn Marino if (!strcmp(nm, PEM_STRING_X509_OLD) &&
255f5b1c8a1SJohn Marino !strcmp(name, PEM_STRING_X509_TRUSTED))
256f5b1c8a1SJohn Marino return 1;
257f5b1c8a1SJohn Marino
258f5b1c8a1SJohn Marino /* Some CAs use PKCS#7 with CERTIFICATE headers */
259f5b1c8a1SJohn Marino if (!strcmp(nm, PEM_STRING_X509) &&
260f5b1c8a1SJohn Marino !strcmp(name, PEM_STRING_PKCS7))
261f5b1c8a1SJohn Marino return 1;
262f5b1c8a1SJohn Marino
263f5b1c8a1SJohn Marino if (!strcmp(nm, PEM_STRING_PKCS7_SIGNED) &&
264f5b1c8a1SJohn Marino !strcmp(name, PEM_STRING_PKCS7))
265f5b1c8a1SJohn Marino return 1;
266f5b1c8a1SJohn Marino
267cca6fc52SDaniel Fojt #ifndef OPENSSL_NO_CMS
268cca6fc52SDaniel Fojt if (strcmp(nm, PEM_STRING_X509) == 0 &&
269cca6fc52SDaniel Fojt strcmp(name, PEM_STRING_CMS) == 0)
270cca6fc52SDaniel Fojt return 1;
271cca6fc52SDaniel Fojt
272cca6fc52SDaniel Fojt /* Allow CMS to be read from PKCS#7 headers */
273cca6fc52SDaniel Fojt if (strcmp(nm, PEM_STRING_PKCS7) == 0 &&
274cca6fc52SDaniel Fojt strcmp(name, PEM_STRING_CMS) == 0)
275cca6fc52SDaniel Fojt return 1;
276cca6fc52SDaniel Fojt #endif
277f5b1c8a1SJohn Marino
278f5b1c8a1SJohn Marino return 0;
279f5b1c8a1SJohn Marino }
280f5b1c8a1SJohn Marino
281f5b1c8a1SJohn Marino int
PEM_bytes_read_bio(unsigned char ** pdata,long * plen,char ** pnm,const char * name,BIO * bp,pem_password_cb * cb,void * u)282f5b1c8a1SJohn Marino PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
283f5b1c8a1SJohn Marino const char *name, BIO *bp, pem_password_cb *cb, void *u)
284f5b1c8a1SJohn Marino {
285f5b1c8a1SJohn Marino EVP_CIPHER_INFO cipher;
286f5b1c8a1SJohn Marino char *nm = NULL, *header = NULL;
287f5b1c8a1SJohn Marino unsigned char *data = NULL;
288f5b1c8a1SJohn Marino long len;
289f5b1c8a1SJohn Marino int ret = 0;
290f5b1c8a1SJohn Marino
291f5b1c8a1SJohn Marino for (;;) {
292f5b1c8a1SJohn Marino if (!PEM_read_bio(bp, &nm, &header, &data, &len)) {
293f5b1c8a1SJohn Marino if (ERR_GET_REASON(ERR_peek_error()) ==
294f5b1c8a1SJohn Marino PEM_R_NO_START_LINE)
295f5b1c8a1SJohn Marino ERR_asprintf_error_data("Expecting: %s", name);
296f5b1c8a1SJohn Marino return 0;
297f5b1c8a1SJohn Marino }
298f5b1c8a1SJohn Marino if (check_pem(nm, name))
299f5b1c8a1SJohn Marino break;
300f5b1c8a1SJohn Marino free(nm);
301f5b1c8a1SJohn Marino free(header);
302f5b1c8a1SJohn Marino free(data);
303f5b1c8a1SJohn Marino }
304f5b1c8a1SJohn Marino if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
305f5b1c8a1SJohn Marino goto err;
306f5b1c8a1SJohn Marino if (!PEM_do_header(&cipher, data, &len, cb, u))
307f5b1c8a1SJohn Marino goto err;
308f5b1c8a1SJohn Marino
309f5b1c8a1SJohn Marino *pdata = data;
310f5b1c8a1SJohn Marino *plen = len;
311f5b1c8a1SJohn Marino
312f5b1c8a1SJohn Marino if (pnm)
313f5b1c8a1SJohn Marino *pnm = nm;
314f5b1c8a1SJohn Marino
315f5b1c8a1SJohn Marino ret = 1;
316f5b1c8a1SJohn Marino
317f5b1c8a1SJohn Marino err:
318f5b1c8a1SJohn Marino if (!ret || !pnm)
319f5b1c8a1SJohn Marino free(nm);
320f5b1c8a1SJohn Marino free(header);
321f5b1c8a1SJohn Marino if (!ret)
322f5b1c8a1SJohn Marino free(data);
323f5b1c8a1SJohn Marino return ret;
324f5b1c8a1SJohn Marino }
325f5b1c8a1SJohn Marino
326f5b1c8a1SJohn Marino int
PEM_ASN1_write(i2d_of_void * i2d,const char * name,FILE * fp,void * x,const EVP_CIPHER * enc,unsigned char * kstr,int klen,pem_password_cb * callback,void * u)327f5b1c8a1SJohn Marino PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp, void *x,
328f5b1c8a1SJohn Marino const EVP_CIPHER *enc, unsigned char *kstr, int klen,
329f5b1c8a1SJohn Marino pem_password_cb *callback, void *u)
330f5b1c8a1SJohn Marino {
331f5b1c8a1SJohn Marino BIO *b;
332f5b1c8a1SJohn Marino int ret;
333f5b1c8a1SJohn Marino
334f5b1c8a1SJohn Marino if ((b = BIO_new(BIO_s_file())) == NULL) {
33572c33676SMaxim Ag PEMerror(ERR_R_BUF_LIB);
336f5b1c8a1SJohn Marino return (0);
337f5b1c8a1SJohn Marino }
338f5b1c8a1SJohn Marino BIO_set_fp(b, fp, BIO_NOCLOSE);
339f5b1c8a1SJohn Marino ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u);
340f5b1c8a1SJohn Marino BIO_free(b);
341f5b1c8a1SJohn Marino return (ret);
342f5b1c8a1SJohn Marino }
343f5b1c8a1SJohn Marino
344f5b1c8a1SJohn Marino int
PEM_ASN1_write_bio(i2d_of_void * i2d,const char * name,BIO * bp,void * x,const EVP_CIPHER * enc,unsigned char * kstr,int klen,pem_password_cb * callback,void * u)345f5b1c8a1SJohn Marino PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp, void *x,
346f5b1c8a1SJohn Marino const EVP_CIPHER *enc, unsigned char *kstr, int klen,
347f5b1c8a1SJohn Marino pem_password_cb *callback, void *u)
348f5b1c8a1SJohn Marino {
349f5b1c8a1SJohn Marino EVP_CIPHER_CTX ctx;
350f5b1c8a1SJohn Marino int dsize = 0, i, j, ret = 0;
351f5b1c8a1SJohn Marino unsigned char *p, *data = NULL;
352f5b1c8a1SJohn Marino const char *objstr = NULL;
353f5b1c8a1SJohn Marino char buf[PEM_BUFSIZE];
354f5b1c8a1SJohn Marino unsigned char key[EVP_MAX_KEY_LENGTH];
355f5b1c8a1SJohn Marino unsigned char iv[EVP_MAX_IV_LENGTH];
356f5b1c8a1SJohn Marino
357f5b1c8a1SJohn Marino if (enc != NULL) {
358f5b1c8a1SJohn Marino objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
359f5b1c8a1SJohn Marino if (objstr == NULL) {
36072c33676SMaxim Ag PEMerror(PEM_R_UNSUPPORTED_CIPHER);
361f5b1c8a1SJohn Marino goto err;
362f5b1c8a1SJohn Marino }
363f5b1c8a1SJohn Marino }
364f5b1c8a1SJohn Marino
365f5b1c8a1SJohn Marino if ((dsize = i2d(x, NULL)) < 0) {
36672c33676SMaxim Ag PEMerror(ERR_R_ASN1_LIB);
367f5b1c8a1SJohn Marino dsize = 0;
368f5b1c8a1SJohn Marino goto err;
369f5b1c8a1SJohn Marino }
370f5b1c8a1SJohn Marino /* dzise + 8 bytes are needed */
371f5b1c8a1SJohn Marino /* actually it needs the cipher block size extra... */
372f5b1c8a1SJohn Marino data = malloc(dsize + 20);
373f5b1c8a1SJohn Marino if (data == NULL) {
37472c33676SMaxim Ag PEMerror(ERR_R_MALLOC_FAILURE);
375f5b1c8a1SJohn Marino goto err;
376f5b1c8a1SJohn Marino }
377f5b1c8a1SJohn Marino p = data;
378f5b1c8a1SJohn Marino i = i2d(x, &p);
379f5b1c8a1SJohn Marino
380f5b1c8a1SJohn Marino if (enc != NULL) {
381f5b1c8a1SJohn Marino if (kstr == NULL) {
382f5b1c8a1SJohn Marino if (callback == NULL)
383f5b1c8a1SJohn Marino klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
384f5b1c8a1SJohn Marino else
385f5b1c8a1SJohn Marino klen = (*callback)(buf, PEM_BUFSIZE, 1, u);
386f5b1c8a1SJohn Marino if (klen <= 0) {
38772c33676SMaxim Ag PEMerror(PEM_R_READ_KEY);
388f5b1c8a1SJohn Marino goto err;
389f5b1c8a1SJohn Marino }
390f5b1c8a1SJohn Marino kstr = (unsigned char *)buf;
391f5b1c8a1SJohn Marino }
392f5b1c8a1SJohn Marino if ((size_t)enc->iv_len > sizeof(iv)) {
39372c33676SMaxim Ag PEMerror(EVP_R_IV_TOO_LARGE);
394f5b1c8a1SJohn Marino goto err;
395f5b1c8a1SJohn Marino }
396f5b1c8a1SJohn Marino arc4random_buf(iv, enc->iv_len); /* Generate a salt */
397f5b1c8a1SJohn Marino /* The 'iv' is used as the iv and as a salt. It is
398f5b1c8a1SJohn Marino * NOT taken from the BytesToKey function */
399f5b1c8a1SJohn Marino if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1,
400f5b1c8a1SJohn Marino key, NULL))
401f5b1c8a1SJohn Marino goto err;
402f5b1c8a1SJohn Marino
403f5b1c8a1SJohn Marino if (kstr == (unsigned char *)buf)
404f5b1c8a1SJohn Marino explicit_bzero(buf, PEM_BUFSIZE);
405f5b1c8a1SJohn Marino
406f5b1c8a1SJohn Marino if (strlen(objstr) + 23 + 2 * enc->iv_len + 13 > sizeof buf) {
40772c33676SMaxim Ag PEMerror(ASN1_R_BUFFER_TOO_SMALL);
408f5b1c8a1SJohn Marino goto err;
409f5b1c8a1SJohn Marino }
410f5b1c8a1SJohn Marino
411f5b1c8a1SJohn Marino buf[0] = '\0';
412f5b1c8a1SJohn Marino PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
413f5b1c8a1SJohn Marino PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv);
414f5b1c8a1SJohn Marino /* k=strlen(buf); */
415f5b1c8a1SJohn Marino
416f5b1c8a1SJohn Marino EVP_CIPHER_CTX_init(&ctx);
417f5b1c8a1SJohn Marino ret = 1;
418f5b1c8a1SJohn Marino if (!EVP_EncryptInit_ex(&ctx, enc, NULL, key, iv) ||
419f5b1c8a1SJohn Marino !EVP_EncryptUpdate(&ctx, data, &j, data, i) ||
420f5b1c8a1SJohn Marino !EVP_EncryptFinal_ex(&ctx, &(data[j]), &i))
421f5b1c8a1SJohn Marino ret = 0;
422f5b1c8a1SJohn Marino EVP_CIPHER_CTX_cleanup(&ctx);
423f5b1c8a1SJohn Marino if (ret == 0)
424f5b1c8a1SJohn Marino goto err;
425f5b1c8a1SJohn Marino i += j;
426f5b1c8a1SJohn Marino } else {
427f5b1c8a1SJohn Marino ret = 1;
428f5b1c8a1SJohn Marino buf[0] = '\0';
429f5b1c8a1SJohn Marino }
430f5b1c8a1SJohn Marino i = PEM_write_bio(bp, name, buf, data, i);
431f5b1c8a1SJohn Marino if (i <= 0)
432f5b1c8a1SJohn Marino ret = 0;
433f5b1c8a1SJohn Marino err:
434f5b1c8a1SJohn Marino explicit_bzero(key, sizeof(key));
435f5b1c8a1SJohn Marino explicit_bzero(iv, sizeof(iv));
436f5b1c8a1SJohn Marino explicit_bzero((char *)&ctx, sizeof(ctx));
437f5b1c8a1SJohn Marino explicit_bzero(buf, PEM_BUFSIZE);
43872c33676SMaxim Ag freezero(data, (unsigned int)dsize);
439f5b1c8a1SJohn Marino return (ret);
440f5b1c8a1SJohn Marino }
441f5b1c8a1SJohn Marino
442f5b1c8a1SJohn Marino int
PEM_do_header(EVP_CIPHER_INFO * cipher,unsigned char * data,long * plen,pem_password_cb * callback,void * u)443f5b1c8a1SJohn Marino PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
444f5b1c8a1SJohn Marino pem_password_cb *callback, void *u)
445f5b1c8a1SJohn Marino {
446f5b1c8a1SJohn Marino int i, j, o, klen;
447f5b1c8a1SJohn Marino long len;
448f5b1c8a1SJohn Marino EVP_CIPHER_CTX ctx;
449f5b1c8a1SJohn Marino unsigned char key[EVP_MAX_KEY_LENGTH];
450f5b1c8a1SJohn Marino char buf[PEM_BUFSIZE];
451f5b1c8a1SJohn Marino
452f5b1c8a1SJohn Marino len = *plen;
453f5b1c8a1SJohn Marino
454f5b1c8a1SJohn Marino if (cipher->cipher == NULL)
455f5b1c8a1SJohn Marino return (1);
456f5b1c8a1SJohn Marino if (callback == NULL)
457f5b1c8a1SJohn Marino klen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
458f5b1c8a1SJohn Marino else
459f5b1c8a1SJohn Marino klen = callback(buf, PEM_BUFSIZE, 0, u);
460f5b1c8a1SJohn Marino if (klen <= 0) {
46172c33676SMaxim Ag PEMerror(PEM_R_BAD_PASSWORD_READ);
462f5b1c8a1SJohn Marino return (0);
463f5b1c8a1SJohn Marino }
464f5b1c8a1SJohn Marino if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]),
465f5b1c8a1SJohn Marino (unsigned char *)buf, klen, 1, key, NULL))
466f5b1c8a1SJohn Marino return 0;
467f5b1c8a1SJohn Marino
468f5b1c8a1SJohn Marino j = (int)len;
469f5b1c8a1SJohn Marino EVP_CIPHER_CTX_init(&ctx);
470f5b1c8a1SJohn Marino o = EVP_DecryptInit_ex(&ctx, cipher->cipher, NULL, key,
471f5b1c8a1SJohn Marino &(cipher->iv[0]));
472f5b1c8a1SJohn Marino if (o)
473f5b1c8a1SJohn Marino o = EVP_DecryptUpdate(&ctx, data, &i, data, j);
474f5b1c8a1SJohn Marino if (o)
475f5b1c8a1SJohn Marino o = EVP_DecryptFinal_ex(&ctx, &(data[i]), &j);
476f5b1c8a1SJohn Marino EVP_CIPHER_CTX_cleanup(&ctx);
477f5b1c8a1SJohn Marino explicit_bzero((char *)buf, sizeof(buf));
478f5b1c8a1SJohn Marino explicit_bzero((char *)key, sizeof(key));
479f5b1c8a1SJohn Marino if (!o) {
48072c33676SMaxim Ag PEMerror(PEM_R_BAD_DECRYPT);
481f5b1c8a1SJohn Marino return (0);
482f5b1c8a1SJohn Marino }
483f5b1c8a1SJohn Marino *plen = j + i;
484f5b1c8a1SJohn Marino return (1);
485f5b1c8a1SJohn Marino }
486f5b1c8a1SJohn Marino
487f5b1c8a1SJohn Marino int
PEM_get_EVP_CIPHER_INFO(char * header,EVP_CIPHER_INFO * cipher)488f5b1c8a1SJohn Marino PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
489f5b1c8a1SJohn Marino {
490f5b1c8a1SJohn Marino const EVP_CIPHER *enc = NULL;
491f5b1c8a1SJohn Marino char *p, c;
492f5b1c8a1SJohn Marino char **header_pp = &header;
493f5b1c8a1SJohn Marino
494f5b1c8a1SJohn Marino cipher->cipher = NULL;
495f5b1c8a1SJohn Marino if ((header == NULL) || (*header == '\0') || (*header == '\n'))
496f5b1c8a1SJohn Marino return (1);
497f5b1c8a1SJohn Marino if (strncmp(header, "Proc-Type: ", 11) != 0) {
49872c33676SMaxim Ag PEMerror(PEM_R_NOT_PROC_TYPE);
499f5b1c8a1SJohn Marino return (0);
500f5b1c8a1SJohn Marino }
501f5b1c8a1SJohn Marino header += 11;
502f5b1c8a1SJohn Marino if (*header != '4')
503f5b1c8a1SJohn Marino return (0);
504f5b1c8a1SJohn Marino header++;
505f5b1c8a1SJohn Marino if (*header != ',')
506f5b1c8a1SJohn Marino return (0);
507f5b1c8a1SJohn Marino header++;
508f5b1c8a1SJohn Marino if (strncmp(header, "ENCRYPTED", 9) != 0) {
50972c33676SMaxim Ag PEMerror(PEM_R_NOT_ENCRYPTED);
510f5b1c8a1SJohn Marino return (0);
511f5b1c8a1SJohn Marino }
512f5b1c8a1SJohn Marino for (; (*header != '\n') && (*header != '\0'); header++)
513f5b1c8a1SJohn Marino ;
514f5b1c8a1SJohn Marino if (*header == '\0') {
51572c33676SMaxim Ag PEMerror(PEM_R_SHORT_HEADER);
516f5b1c8a1SJohn Marino return (0);
517f5b1c8a1SJohn Marino }
518f5b1c8a1SJohn Marino header++;
519f5b1c8a1SJohn Marino if (strncmp(header, "DEK-Info: ", 10) != 0) {
52072c33676SMaxim Ag PEMerror(PEM_R_NOT_DEK_INFO);
521f5b1c8a1SJohn Marino return (0);
522f5b1c8a1SJohn Marino }
523f5b1c8a1SJohn Marino header += 10;
524f5b1c8a1SJohn Marino
525f5b1c8a1SJohn Marino p = header;
526f5b1c8a1SJohn Marino for (;;) {
527f5b1c8a1SJohn Marino c= *header;
528f5b1c8a1SJohn Marino if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
529f5b1c8a1SJohn Marino ((c >= '0') && (c <= '9'))))
530f5b1c8a1SJohn Marino break;
531f5b1c8a1SJohn Marino header++;
532f5b1c8a1SJohn Marino }
533f5b1c8a1SJohn Marino *header = '\0';
534f5b1c8a1SJohn Marino cipher->cipher = enc = EVP_get_cipherbyname(p);
535f5b1c8a1SJohn Marino *header = c;
536f5b1c8a1SJohn Marino header++;
537f5b1c8a1SJohn Marino
538f5b1c8a1SJohn Marino if (enc == NULL) {
53972c33676SMaxim Ag PEMerror(PEM_R_UNSUPPORTED_ENCRYPTION);
540f5b1c8a1SJohn Marino return (0);
541f5b1c8a1SJohn Marino }
542f5b1c8a1SJohn Marino if (!load_iv(header_pp, &(cipher->iv[0]), enc->iv_len))
543f5b1c8a1SJohn Marino return (0);
544f5b1c8a1SJohn Marino
545f5b1c8a1SJohn Marino return (1);
546f5b1c8a1SJohn Marino }
547f5b1c8a1SJohn Marino
548f5b1c8a1SJohn Marino static int
load_iv(char ** fromp,unsigned char * to,int num)549f5b1c8a1SJohn Marino load_iv(char **fromp, unsigned char *to, int num)
550f5b1c8a1SJohn Marino {
551f5b1c8a1SJohn Marino int v, i;
552f5b1c8a1SJohn Marino char *from;
553f5b1c8a1SJohn Marino
554f5b1c8a1SJohn Marino from= *fromp;
555f5b1c8a1SJohn Marino for (i = 0; i < num; i++)
556f5b1c8a1SJohn Marino to[i] = 0;
557f5b1c8a1SJohn Marino num *= 2;
558f5b1c8a1SJohn Marino for (i = 0; i < num; i++) {
559f5b1c8a1SJohn Marino if ((*from >= '0') && (*from <= '9'))
560f5b1c8a1SJohn Marino v = *from - '0';
561f5b1c8a1SJohn Marino else if ((*from >= 'A') && (*from <= 'F'))
562f5b1c8a1SJohn Marino v = *from - 'A' + 10;
563f5b1c8a1SJohn Marino else if ((*from >= 'a') && (*from <= 'f'))
564f5b1c8a1SJohn Marino v = *from - 'a' + 10;
565f5b1c8a1SJohn Marino else {
56672c33676SMaxim Ag PEMerror(PEM_R_BAD_IV_CHARS);
567f5b1c8a1SJohn Marino return (0);
568f5b1c8a1SJohn Marino }
569f5b1c8a1SJohn Marino from++;
570f5b1c8a1SJohn Marino to[i / 2] |= v << (long)((!(i & 1)) * 4);
571f5b1c8a1SJohn Marino }
572f5b1c8a1SJohn Marino
573f5b1c8a1SJohn Marino *fromp = from;
574f5b1c8a1SJohn Marino return (1);
575f5b1c8a1SJohn Marino }
576f5b1c8a1SJohn Marino
577f5b1c8a1SJohn Marino int
PEM_write(FILE * fp,const char * name,const char * header,const unsigned char * data,long len)57872c33676SMaxim Ag PEM_write(FILE *fp, const char *name, const char *header,
57972c33676SMaxim Ag const unsigned char *data, long len)
580f5b1c8a1SJohn Marino {
581f5b1c8a1SJohn Marino BIO *b;
582f5b1c8a1SJohn Marino int ret;
583f5b1c8a1SJohn Marino
584f5b1c8a1SJohn Marino if ((b = BIO_new(BIO_s_file())) == NULL) {
58572c33676SMaxim Ag PEMerror(ERR_R_BUF_LIB);
586f5b1c8a1SJohn Marino return (0);
587f5b1c8a1SJohn Marino }
588f5b1c8a1SJohn Marino BIO_set_fp(b, fp, BIO_NOCLOSE);
589f5b1c8a1SJohn Marino ret = PEM_write_bio(b, name, header, data, len);
590f5b1c8a1SJohn Marino BIO_free(b);
591f5b1c8a1SJohn Marino return (ret);
592f5b1c8a1SJohn Marino }
593f5b1c8a1SJohn Marino
594f5b1c8a1SJohn Marino int
PEM_write_bio(BIO * bp,const char * name,const char * header,const unsigned char * data,long len)59572c33676SMaxim Ag PEM_write_bio(BIO *bp, const char *name, const char *header,
59672c33676SMaxim Ag const unsigned char *data, long len)
597f5b1c8a1SJohn Marino {
598f5b1c8a1SJohn Marino int nlen, n, i, j, outl;
599f5b1c8a1SJohn Marino unsigned char *buf = NULL;
600f5b1c8a1SJohn Marino EVP_ENCODE_CTX ctx;
601f5b1c8a1SJohn Marino int reason = ERR_R_BUF_LIB;
602f5b1c8a1SJohn Marino
603f5b1c8a1SJohn Marino EVP_EncodeInit(&ctx);
604f5b1c8a1SJohn Marino nlen = strlen(name);
605f5b1c8a1SJohn Marino
606f5b1c8a1SJohn Marino if ((BIO_write(bp, "-----BEGIN ", 11) != 11) ||
607f5b1c8a1SJohn Marino (BIO_write(bp, name, nlen) != nlen) ||
608f5b1c8a1SJohn Marino (BIO_write(bp, "-----\n", 6) != 6))
609f5b1c8a1SJohn Marino goto err;
610f5b1c8a1SJohn Marino
611*de0e0e4dSAntonio Huete Jimenez if (header != NULL && (i = strlen(header)) > 0) {
612f5b1c8a1SJohn Marino if ((BIO_write(bp, header, i) != i) ||
613f5b1c8a1SJohn Marino (BIO_write(bp, "\n", 1) != 1))
614f5b1c8a1SJohn Marino goto err;
615f5b1c8a1SJohn Marino }
616f5b1c8a1SJohn Marino
617f5b1c8a1SJohn Marino buf = reallocarray(NULL, PEM_BUFSIZE, 8);
618f5b1c8a1SJohn Marino if (buf == NULL) {
619f5b1c8a1SJohn Marino reason = ERR_R_MALLOC_FAILURE;
620f5b1c8a1SJohn Marino goto err;
621f5b1c8a1SJohn Marino }
622f5b1c8a1SJohn Marino
623f5b1c8a1SJohn Marino i = j = 0;
624f5b1c8a1SJohn Marino while (len > 0) {
625f5b1c8a1SJohn Marino n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len);
62672c33676SMaxim Ag if (!EVP_EncodeUpdate(&ctx, buf, &outl, &(data[j]), n))
62772c33676SMaxim Ag goto err;
628f5b1c8a1SJohn Marino if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl))
629f5b1c8a1SJohn Marino goto err;
630f5b1c8a1SJohn Marino i += outl;
631f5b1c8a1SJohn Marino len -= n;
632f5b1c8a1SJohn Marino j += n;
633f5b1c8a1SJohn Marino }
634f5b1c8a1SJohn Marino EVP_EncodeFinal(&ctx, buf, &outl);
635f5b1c8a1SJohn Marino if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
636f5b1c8a1SJohn Marino goto err;
63772c33676SMaxim Ag freezero(buf, PEM_BUFSIZE * 8);
638f5b1c8a1SJohn Marino buf = NULL;
639f5b1c8a1SJohn Marino if ((BIO_write(bp, "-----END ", 9) != 9) ||
640f5b1c8a1SJohn Marino (BIO_write(bp, name, nlen) != nlen) ||
641f5b1c8a1SJohn Marino (BIO_write(bp, "-----\n", 6) != 6))
642f5b1c8a1SJohn Marino goto err;
643f5b1c8a1SJohn Marino return (i + outl);
644f5b1c8a1SJohn Marino
645f5b1c8a1SJohn Marino err:
64672c33676SMaxim Ag freezero(buf, PEM_BUFSIZE * 8);
64772c33676SMaxim Ag PEMerror(reason);
648f5b1c8a1SJohn Marino return (0);
649f5b1c8a1SJohn Marino }
650f5b1c8a1SJohn Marino
651f5b1c8a1SJohn Marino int
PEM_read(FILE * fp,char ** name,char ** header,unsigned char ** data,long * len)652f5b1c8a1SJohn Marino PEM_read(FILE *fp, char **name, char **header, unsigned char **data, long *len)
653f5b1c8a1SJohn Marino {
654f5b1c8a1SJohn Marino BIO *b;
655f5b1c8a1SJohn Marino int ret;
656f5b1c8a1SJohn Marino
657f5b1c8a1SJohn Marino if ((b = BIO_new(BIO_s_file())) == NULL) {
65872c33676SMaxim Ag PEMerror(ERR_R_BUF_LIB);
659f5b1c8a1SJohn Marino return (0);
660f5b1c8a1SJohn Marino }
661f5b1c8a1SJohn Marino BIO_set_fp(b, fp, BIO_NOCLOSE);
662f5b1c8a1SJohn Marino ret = PEM_read_bio(b, name, header, data, len);
663f5b1c8a1SJohn Marino BIO_free(b);
664f5b1c8a1SJohn Marino return (ret);
665f5b1c8a1SJohn Marino }
666f5b1c8a1SJohn Marino
667f5b1c8a1SJohn Marino int
PEM_read_bio(BIO * bp,char ** name,char ** header,unsigned char ** data,long * len)668f5b1c8a1SJohn Marino PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
669f5b1c8a1SJohn Marino long *len)
670f5b1c8a1SJohn Marino {
671f5b1c8a1SJohn Marino EVP_ENCODE_CTX ctx;
672f5b1c8a1SJohn Marino int end = 0, i, k, bl = 0, hl = 0, nohead = 0;
673f5b1c8a1SJohn Marino char buf[256];
674f5b1c8a1SJohn Marino BUF_MEM *nameB;
675f5b1c8a1SJohn Marino BUF_MEM *headerB;
676f5b1c8a1SJohn Marino BUF_MEM *dataB, *tmpB;
677f5b1c8a1SJohn Marino
678f5b1c8a1SJohn Marino nameB = BUF_MEM_new();
679f5b1c8a1SJohn Marino headerB = BUF_MEM_new();
680f5b1c8a1SJohn Marino dataB = BUF_MEM_new();
681f5b1c8a1SJohn Marino if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) {
682f5b1c8a1SJohn Marino BUF_MEM_free(nameB);
683f5b1c8a1SJohn Marino BUF_MEM_free(headerB);
684f5b1c8a1SJohn Marino BUF_MEM_free(dataB);
68572c33676SMaxim Ag PEMerror(ERR_R_MALLOC_FAILURE);
686f5b1c8a1SJohn Marino return (0);
687f5b1c8a1SJohn Marino }
688f5b1c8a1SJohn Marino
689f5b1c8a1SJohn Marino buf[254] = '\0';
690f5b1c8a1SJohn Marino for (;;) {
691f5b1c8a1SJohn Marino i = BIO_gets(bp, buf, 254);
692f5b1c8a1SJohn Marino
693f5b1c8a1SJohn Marino if (i <= 0) {
69472c33676SMaxim Ag PEMerror(PEM_R_NO_START_LINE);
695f5b1c8a1SJohn Marino goto err;
696f5b1c8a1SJohn Marino }
697f5b1c8a1SJohn Marino
698f5b1c8a1SJohn Marino while ((i >= 0) && (buf[i] <= ' '))
699f5b1c8a1SJohn Marino i--;
700f5b1c8a1SJohn Marino buf[++i] = '\n';
701f5b1c8a1SJohn Marino buf[++i] = '\0';
702f5b1c8a1SJohn Marino
703f5b1c8a1SJohn Marino if (strncmp(buf, "-----BEGIN ", 11) == 0) {
704f5b1c8a1SJohn Marino i = strlen(&(buf[11]));
705f5b1c8a1SJohn Marino
706f5b1c8a1SJohn Marino if (strncmp(&(buf[11 + i - 6]), "-----\n", 6) != 0)
707f5b1c8a1SJohn Marino continue;
708f5b1c8a1SJohn Marino if (!BUF_MEM_grow(nameB, i + 9)) {
70972c33676SMaxim Ag PEMerror(ERR_R_MALLOC_FAILURE);
710f5b1c8a1SJohn Marino goto err;
711f5b1c8a1SJohn Marino }
712f5b1c8a1SJohn Marino memcpy(nameB->data, &(buf[11]), i - 6);
713f5b1c8a1SJohn Marino nameB->data[i - 6] = '\0';
714f5b1c8a1SJohn Marino break;
715f5b1c8a1SJohn Marino }
716f5b1c8a1SJohn Marino }
717f5b1c8a1SJohn Marino hl = 0;
718f5b1c8a1SJohn Marino if (!BUF_MEM_grow(headerB, 256)) {
71972c33676SMaxim Ag PEMerror(ERR_R_MALLOC_FAILURE);
720f5b1c8a1SJohn Marino goto err;
721f5b1c8a1SJohn Marino }
722f5b1c8a1SJohn Marino headerB->data[0] = '\0';
723f5b1c8a1SJohn Marino for (;;) {
724f5b1c8a1SJohn Marino i = BIO_gets(bp, buf, 254);
725f5b1c8a1SJohn Marino if (i <= 0)
726f5b1c8a1SJohn Marino break;
727f5b1c8a1SJohn Marino
728f5b1c8a1SJohn Marino while ((i >= 0) && (buf[i] <= ' '))
729f5b1c8a1SJohn Marino i--;
730f5b1c8a1SJohn Marino buf[++i] = '\n';
731f5b1c8a1SJohn Marino buf[++i] = '\0';
732f5b1c8a1SJohn Marino
733f5b1c8a1SJohn Marino if (buf[0] == '\n')
734f5b1c8a1SJohn Marino break;
735f5b1c8a1SJohn Marino if (!BUF_MEM_grow(headerB, hl + i + 9)) {
73672c33676SMaxim Ag PEMerror(ERR_R_MALLOC_FAILURE);
737f5b1c8a1SJohn Marino goto err;
738f5b1c8a1SJohn Marino }
739f5b1c8a1SJohn Marino if (strncmp(buf, "-----END ", 9) == 0) {
740f5b1c8a1SJohn Marino nohead = 1;
741f5b1c8a1SJohn Marino break;
742f5b1c8a1SJohn Marino }
743f5b1c8a1SJohn Marino memcpy(&(headerB->data[hl]), buf, i);
744f5b1c8a1SJohn Marino headerB->data[hl + i] = '\0';
745f5b1c8a1SJohn Marino hl += i;
746f5b1c8a1SJohn Marino }
747f5b1c8a1SJohn Marino
748f5b1c8a1SJohn Marino bl = 0;
749f5b1c8a1SJohn Marino if (!BUF_MEM_grow(dataB, 1024)) {
75072c33676SMaxim Ag PEMerror(ERR_R_MALLOC_FAILURE);
751f5b1c8a1SJohn Marino goto err;
752f5b1c8a1SJohn Marino }
753f5b1c8a1SJohn Marino dataB->data[0] = '\0';
754f5b1c8a1SJohn Marino if (!nohead) {
755f5b1c8a1SJohn Marino for (;;) {
756f5b1c8a1SJohn Marino i = BIO_gets(bp, buf, 254);
757f5b1c8a1SJohn Marino if (i <= 0)
758f5b1c8a1SJohn Marino break;
759f5b1c8a1SJohn Marino
760f5b1c8a1SJohn Marino while ((i >= 0) && (buf[i] <= ' '))
761f5b1c8a1SJohn Marino i--;
762f5b1c8a1SJohn Marino buf[++i] = '\n';
763f5b1c8a1SJohn Marino buf[++i] = '\0';
764f5b1c8a1SJohn Marino
765f5b1c8a1SJohn Marino if (i != 65)
766f5b1c8a1SJohn Marino end = 1;
767f5b1c8a1SJohn Marino if (strncmp(buf, "-----END ", 9) == 0)
768f5b1c8a1SJohn Marino break;
769f5b1c8a1SJohn Marino if (i > 65)
770f5b1c8a1SJohn Marino break;
771f5b1c8a1SJohn Marino if (!BUF_MEM_grow_clean(dataB, i + bl + 9)) {
77272c33676SMaxim Ag PEMerror(ERR_R_MALLOC_FAILURE);
773f5b1c8a1SJohn Marino goto err;
774f5b1c8a1SJohn Marino }
775f5b1c8a1SJohn Marino memcpy(&(dataB->data[bl]), buf, i);
776f5b1c8a1SJohn Marino dataB->data[bl + i] = '\0';
777f5b1c8a1SJohn Marino bl += i;
778f5b1c8a1SJohn Marino if (end) {
779f5b1c8a1SJohn Marino buf[0] = '\0';
780f5b1c8a1SJohn Marino i = BIO_gets(bp, buf, 254);
781f5b1c8a1SJohn Marino if (i <= 0)
782f5b1c8a1SJohn Marino break;
783f5b1c8a1SJohn Marino
784f5b1c8a1SJohn Marino while ((i >= 0) && (buf[i] <= ' '))
785f5b1c8a1SJohn Marino i--;
786f5b1c8a1SJohn Marino buf[++i] = '\n';
787f5b1c8a1SJohn Marino buf[++i] = '\0';
788f5b1c8a1SJohn Marino
789f5b1c8a1SJohn Marino break;
790f5b1c8a1SJohn Marino }
791f5b1c8a1SJohn Marino }
792f5b1c8a1SJohn Marino } else {
793f5b1c8a1SJohn Marino tmpB = headerB;
794f5b1c8a1SJohn Marino headerB = dataB;
795f5b1c8a1SJohn Marino dataB = tmpB;
796f5b1c8a1SJohn Marino bl = hl;
797f5b1c8a1SJohn Marino }
798f5b1c8a1SJohn Marino i = strlen(nameB->data);
799f5b1c8a1SJohn Marino if ((strncmp(buf, "-----END ", 9) != 0) ||
800f5b1c8a1SJohn Marino (strncmp(nameB->data, &(buf[9]), i) != 0) ||
801f5b1c8a1SJohn Marino (strncmp(&(buf[9 + i]), "-----\n", 6) != 0)) {
80272c33676SMaxim Ag PEMerror(PEM_R_BAD_END_LINE);
803f5b1c8a1SJohn Marino goto err;
804f5b1c8a1SJohn Marino }
805f5b1c8a1SJohn Marino
806f5b1c8a1SJohn Marino EVP_DecodeInit(&ctx);
807f5b1c8a1SJohn Marino i = EVP_DecodeUpdate(&ctx,
808f5b1c8a1SJohn Marino (unsigned char *)dataB->data, &bl,
809f5b1c8a1SJohn Marino (unsigned char *)dataB->data, bl);
810f5b1c8a1SJohn Marino if (i < 0) {
81172c33676SMaxim Ag PEMerror(PEM_R_BAD_BASE64_DECODE);
812f5b1c8a1SJohn Marino goto err;
813f5b1c8a1SJohn Marino }
814f5b1c8a1SJohn Marino i = EVP_DecodeFinal(&ctx, (unsigned char *)&(dataB->data[bl]), &k);
815f5b1c8a1SJohn Marino if (i < 0) {
81672c33676SMaxim Ag PEMerror(PEM_R_BAD_BASE64_DECODE);
817f5b1c8a1SJohn Marino goto err;
818f5b1c8a1SJohn Marino }
819f5b1c8a1SJohn Marino bl += k;
820f5b1c8a1SJohn Marino
821f5b1c8a1SJohn Marino if (bl == 0)
822f5b1c8a1SJohn Marino goto err;
823f5b1c8a1SJohn Marino *name = nameB->data;
824f5b1c8a1SJohn Marino *header = headerB->data;
825f5b1c8a1SJohn Marino *data = (unsigned char *)dataB->data;
826f5b1c8a1SJohn Marino *len = bl;
827f5b1c8a1SJohn Marino free(nameB);
828f5b1c8a1SJohn Marino free(headerB);
829f5b1c8a1SJohn Marino free(dataB);
830f5b1c8a1SJohn Marino return (1);
831f5b1c8a1SJohn Marino
832f5b1c8a1SJohn Marino err:
833f5b1c8a1SJohn Marino BUF_MEM_free(nameB);
834f5b1c8a1SJohn Marino BUF_MEM_free(headerB);
835f5b1c8a1SJohn Marino BUF_MEM_free(dataB);
836f5b1c8a1SJohn Marino return (0);
837f5b1c8a1SJohn Marino }
838f5b1c8a1SJohn Marino
839f5b1c8a1SJohn Marino /* Check pem string and return prefix length.
840f5b1c8a1SJohn Marino * If for example the pem_str == "RSA PRIVATE KEY" and suffix = "PRIVATE KEY"
841f5b1c8a1SJohn Marino * the return value is 3 for the string "RSA".
842f5b1c8a1SJohn Marino */
843f5b1c8a1SJohn Marino
844f5b1c8a1SJohn Marino int
pem_check_suffix(const char * pem_str,const char * suffix)845f5b1c8a1SJohn Marino pem_check_suffix(const char *pem_str, const char *suffix)
846f5b1c8a1SJohn Marino {
847f5b1c8a1SJohn Marino int pem_len = strlen(pem_str);
848f5b1c8a1SJohn Marino int suffix_len = strlen(suffix);
849f5b1c8a1SJohn Marino const char *p;
850f5b1c8a1SJohn Marino
851f5b1c8a1SJohn Marino if (suffix_len + 1 >= pem_len)
852f5b1c8a1SJohn Marino return 0;
853f5b1c8a1SJohn Marino p = pem_str + pem_len - suffix_len;
854f5b1c8a1SJohn Marino if (strcmp(p, suffix))
855f5b1c8a1SJohn Marino return 0;
856f5b1c8a1SJohn Marino p--;
857f5b1c8a1SJohn Marino if (*p != ' ')
858f5b1c8a1SJohn Marino return 0;
859f5b1c8a1SJohn Marino return p - pem_str;
860f5b1c8a1SJohn Marino }
861