1 /*
2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 /*
11 * DSA low level APIs are deprecated for public use, but still ok for
12 * internal use.
13 */
14 #include "internal/deprecated.h"
15
16 #include <stdio.h>
17 #include "internal/cryptlib.h"
18 #include <openssl/buffer.h>
19 #include <openssl/objects.h>
20 #include <openssl/evp.h>
21 #include <openssl/x509.h>
22 #include <openssl/pem.h>
23 #include <openssl/rsa.h>
24 #include <openssl/dsa.h>
25 #include "crypto/evp.h"
26
27 #ifndef OPENSSL_NO_STDIO
STACK_OF(X509_INFO)28 STACK_OF(X509_INFO)
29 *PEM_X509_INFO_read_ex(FILE *fp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb,
30 void *u, OSSL_LIB_CTX *libctx, const char *propq)
31 {
32 BIO *b;
33 STACK_OF(X509_INFO) *ret;
34
35 if ((b = BIO_new(BIO_s_file())) == NULL) {
36 ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB);
37 return 0;
38 }
39 BIO_set_fp(b, fp, BIO_NOCLOSE);
40 ret = PEM_X509_INFO_read_bio_ex(b, sk, cb, u, libctx, propq);
41 BIO_free(b);
42 return ret;
43 }
44
STACK_OF(X509_INFO)45 STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk,
46 pem_password_cb *cb, void *u)
47 {
48 return PEM_X509_INFO_read_ex(fp, sk, cb, u, NULL, NULL);
49 }
50 #endif
51
STACK_OF(X509_INFO)52 STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio_ex(BIO *bp, STACK_OF(X509_INFO) *sk,
53 pem_password_cb *cb, void *u,
54 OSSL_LIB_CTX *libctx,
55 const char *propq)
56 {
57 X509_INFO *xi = NULL;
58 char *name = NULL, *header = NULL, *str;
59 void *pp;
60 unsigned char *data = NULL;
61 const unsigned char *p;
62 long len, error = 0;
63 int ok = 0;
64 STACK_OF(X509_INFO) *ret = NULL;
65 unsigned int i, raw, ptype;
66 d2i_of_void *d2i = 0;
67
68 if (sk == NULL) {
69 if ((ret = sk_X509_INFO_new_null()) == NULL) {
70 ERR_raise(ERR_LIB_PEM, ERR_R_CRYPTO_LIB);
71 goto err;
72 }
73 } else
74 ret = sk;
75
76 if ((xi = X509_INFO_new()) == NULL)
77 goto err;
78 for (;;) {
79 raw = 0;
80 ptype = 0;
81 ERR_set_mark();
82 i = PEM_read_bio(bp, &name, &header, &data, &len);
83 if (i == 0) {
84 error = ERR_GET_REASON(ERR_peek_last_error());
85 if (error == PEM_R_NO_START_LINE) {
86 ERR_pop_to_mark();
87 break;
88 }
89 ERR_clear_last_mark();
90 goto err;
91 }
92 ERR_clear_last_mark();
93 start:
94 if (strcmp(name, PEM_STRING_X509) == 0
95 || strcmp(name, PEM_STRING_X509_OLD) == 0
96 || strcmp(name, PEM_STRING_X509_TRUSTED) == 0) {
97 if (xi->x509 != NULL) {
98 if (!sk_X509_INFO_push(ret, xi))
99 goto err;
100 if ((xi = X509_INFO_new()) == NULL)
101 goto err;
102 goto start;
103 }
104 if ((strcmp(name, PEM_STRING_X509_TRUSTED) == 0))
105 d2i = (D2I_OF(void)) d2i_X509_AUX;
106 else
107 d2i = (D2I_OF(void)) d2i_X509;
108 xi->x509 = X509_new_ex(libctx, propq);
109 if (xi->x509 == NULL)
110 goto err;
111 pp = &(xi->x509);
112 } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) {
113 d2i = (D2I_OF(void)) d2i_X509_CRL;
114 if (xi->crl != NULL) {
115 if (!sk_X509_INFO_push(ret, xi))
116 goto err;
117 if ((xi = X509_INFO_new()) == NULL)
118 goto err;
119 goto start;
120 }
121 pp = &(xi->crl);
122 } else if ((str = strstr(name, PEM_STRING_PKCS8INF)) != NULL) {
123 if (xi->x_pkey != NULL) {
124 if (!sk_X509_INFO_push(ret, xi))
125 goto err;
126 if ((xi = X509_INFO_new()) == NULL)
127 goto err;
128 goto start;
129 }
130 if (str == name || strcmp(name, PEM_STRING_PKCS8) == 0) {
131 ptype = EVP_PKEY_NONE;
132 } else {
133 /* chop " PRIVATE KEY" */
134 *--str = '\0';
135 ptype = evp_pkey_name2type(name);
136 }
137 xi->enc_data = NULL;
138 xi->enc_len = 0;
139
140 d2i = (D2I_OF(void)) d2i_AutoPrivateKey;
141 xi->x_pkey = X509_PKEY_new();
142 if (xi->x_pkey == NULL)
143 goto err;
144 pp = &xi->x_pkey->dec_pkey;
145 if ((int)strlen(header) > 10 /* assume encrypted */
146 || strcmp(name, PEM_STRING_PKCS8) == 0)
147 raw = 1;
148 } else { /* unknown */
149 d2i = NULL;
150 pp = NULL;
151 }
152
153 if (d2i != NULL) {
154 if (!raw) {
155 EVP_CIPHER_INFO cipher;
156
157 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
158 goto err;
159 if (!PEM_do_header(&cipher, data, &len, cb, u))
160 goto err;
161 p = data;
162 if (ptype) {
163 if (d2i_PrivateKey_ex(ptype, pp, &p, len,
164 libctx, propq) == NULL) {
165 ERR_raise(ERR_LIB_PEM, ERR_R_ASN1_LIB);
166 goto err;
167 }
168 } else if (d2i(pp, &p, len) == NULL) {
169 ERR_raise(ERR_LIB_PEM, ERR_R_ASN1_LIB);
170 goto err;
171 }
172 } else { /* encrypted key data */
173 if (!PEM_get_EVP_CIPHER_INFO(header, &xi->enc_cipher))
174 goto err;
175 xi->enc_data = (char *)data;
176 xi->enc_len = (int)len;
177 data = NULL;
178 }
179 }
180 OPENSSL_free(name);
181 name = NULL;
182 OPENSSL_free(header);
183 header = NULL;
184 OPENSSL_free(data);
185 data = NULL;
186 }
187
188 /*
189 * if the last one hasn't been pushed yet and there is anything in it
190 * then add it to the stack ...
191 */
192 if ((xi->x509 != NULL) || (xi->crl != NULL) ||
193 (xi->x_pkey != NULL) || (xi->enc_data != NULL)) {
194 if (!sk_X509_INFO_push(ret, xi))
195 goto err;
196 xi = NULL;
197 }
198 ok = 1;
199 err:
200 X509_INFO_free(xi);
201 if (!ok) {
202 for (i = 0; ((int)i) < sk_X509_INFO_num(ret); i++) {
203 xi = sk_X509_INFO_value(ret, i);
204 X509_INFO_free(xi);
205 }
206 if (ret != sk)
207 sk_X509_INFO_free(ret);
208 ret = NULL;
209 }
210
211 OPENSSL_free(name);
212 OPENSSL_free(header);
213 OPENSSL_free(data);
214 return ret;
215 }
216
STACK_OF(X509_INFO)217 STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk,
218 pem_password_cb *cb, void *u)
219 {
220 return PEM_X509_INFO_read_bio_ex(bp, sk, cb, u, NULL, NULL);
221 }
222
223 /* A TJH addition */
PEM_X509_INFO_write_bio(BIO * bp,const X509_INFO * xi,EVP_CIPHER * enc,const unsigned char * kstr,int klen,pem_password_cb * cb,void * u)224 int PEM_X509_INFO_write_bio(BIO *bp, const X509_INFO *xi, EVP_CIPHER *enc,
225 const unsigned char *kstr, int klen,
226 pem_password_cb *cb, void *u)
227 {
228 int i, ret = 0;
229 unsigned char *data = NULL;
230 const char *objstr = NULL;
231 char buf[PEM_BUFSIZE];
232 const unsigned char *iv = NULL;
233
234 if (enc != NULL) {
235 objstr = EVP_CIPHER_get0_name(enc);
236 if (objstr == NULL
237 /*
238 * Check "Proc-Type: 4,Encrypted\nDEK-Info: objstr,hex-iv\n"
239 * fits into buf
240 */
241 || strlen(objstr) + 23 + 2 * EVP_CIPHER_get_iv_length(enc) + 13
242 > sizeof(buf)) {
243 ERR_raise(ERR_LIB_PEM, PEM_R_UNSUPPORTED_CIPHER);
244 goto err;
245 }
246 }
247
248 /*
249 * now for the fun part ... if we have a private key then we have to be
250 * able to handle a not-yet-decrypted key being written out correctly ...
251 * if it is decrypted or it is non-encrypted then we use the base code
252 */
253 if (xi->x_pkey != NULL) {
254 if ((xi->enc_data != NULL) && (xi->enc_len > 0)) {
255 if (enc == NULL) {
256 ERR_raise(ERR_LIB_PEM, PEM_R_CIPHER_IS_NULL);
257 goto err;
258 }
259
260 /* copy from weirdo names into more normal things */
261 iv = xi->enc_cipher.iv;
262 data = (unsigned char *)xi->enc_data;
263 i = xi->enc_len;
264
265 /*
266 * we take the encryption data from the internal stuff rather
267 * than what the user has passed us ... as we have to match
268 * exactly for some strange reason
269 */
270 objstr = EVP_CIPHER_get0_name(xi->enc_cipher.cipher);
271 if (objstr == NULL) {
272 ERR_raise(ERR_LIB_PEM, PEM_R_UNSUPPORTED_CIPHER);
273 goto err;
274 }
275
276 /* Create the right magic header stuff */
277 buf[0] = '\0';
278 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
279 PEM_dek_info(buf, objstr, EVP_CIPHER_get_iv_length(enc),
280 (const char *)iv);
281
282 /* use the normal code to write things out */
283 i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i);
284 if (i <= 0)
285 goto err;
286 } else {
287 /* Add DSA/DH */
288 /* normal optionally encrypted stuff */
289 if (PEM_write_bio_RSAPrivateKey(bp,
290 EVP_PKEY_get0_RSA(xi->x_pkey->dec_pkey),
291 enc, kstr, klen, cb, u) <= 0)
292 goto err;
293 }
294 }
295
296 /* if we have a certificate then write it out now */
297 if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0))
298 goto err;
299
300 /*
301 * we are ignoring anything else that is loaded into the X509_INFO
302 * structure for the moment ... as I don't need it so I'm not coding it
303 * here and Eric can do it when this makes it into the base library --tjh
304 */
305
306 ret = 1;
307
308 err:
309 OPENSSL_cleanse(buf, PEM_BUFSIZE);
310 return ret;
311 }
312
