1/*
2 * Copyright 1995-2018 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#include <stdio.h>
11#include "internal/cryptlib.h"
12#include <openssl/buffer.h>
13#include <openssl/objects.h>
14#include <openssl/evp.h>
15#include <openssl/x509.h>
16#include <openssl/pkcs12.h>
17#include <openssl/pem.h>
18#include <openssl/engine.h>
19#include <openssl/dh.h>
20#include <openssl/store.h>
21#include <openssl/ui.h>
22#include <openssl/serializer.h>
23#include "crypto/store.h"
24#include "crypto/asn1.h"
25#include "crypto/evp.h"
26#include "pem_local.h"
27
28int pem_check_suffix(const char *pem_str, const char *suffix);
29
30EVP_PKEY *PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
31 void *u)
32{
33 EVP_PKEY *ret = NULL;
34 OSSL_STORE_CTX *ctx = NULL;
35 OSSL_STORE_INFO *info = NULL;
36 UI_METHOD *ui_method = NULL;
37
38 if ((ui_method = UI_UTIL_wrap_read_pem_callback(cb, 0)) == NULL)
39 return NULL;
40
41 if ((ctx = ossl_store_attach_pem_bio(bp, ui_method, u)) == NULL)
42 goto err;
43#ifndef OPENSSL_NO_SECURE_HEAP
44 {
45 int on = 1;
46 if (!OSSL_STORE_ctrl(ctx, OSSL_STORE_C_USE_SECMEM, &on))
47 goto err;
48 }
49#endif
50
51 while (!OSSL_STORE_eof(ctx) && (info = OSSL_STORE_load(ctx)) != NULL) {
52 if (OSSL_STORE_INFO_get_type(info) == OSSL_STORE_INFO_PKEY) {
53 ret = OSSL_STORE_INFO_get1_PKEY(info);
54 break;
55 }
56 OSSL_STORE_INFO_free(info);
57 }
58
59 if (ret != NULL && x != NULL)
60 *x = ret;
61
62 err:
63 ossl_store_detach_pem_bio(ctx);
64 UI_destroy_method(ui_method);
65 OSSL_STORE_INFO_free(info);
66 return ret;
67}
68
69PEM_write_cb_fnsig(PrivateKey, EVP_PKEY, BIO, write_bio)
70{
71 IMPLEMENT_PEM_provided_write_body_vars(EVP_PKEY, PrivateKey);
72
73 IMPLEMENT_PEM_provided_write_body_pass();
74 IMPLEMENT_PEM_provided_write_body_main(EVP_PKEY, bio);
75
76 legacy:
77 if (x->ameth == NULL || x->ameth->priv_encode != NULL)
78 return PEM_write_bio_PKCS8PrivateKey(out, x, enc,
79 (const char *)kstr, klen, cb, u);
80 return PEM_write_bio_PrivateKey_traditional(out, x, enc, kstr, klen, cb, u);
81}
82
83int PEM_write_bio_PrivateKey_traditional(BIO *bp, const EVP_PKEY *x,
84 const EVP_CIPHER *enc,
85 const unsigned char *kstr, int klen,
86 pem_password_cb *cb, void *u)
87{
88 char pem_str[80];
89 BIO_snprintf(pem_str, 80, "%s PRIVATE KEY", x->ameth->pem_str);
90 return PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey,
91 pem_str, bp, x, enc, kstr, klen, cb, u);
92}
93
94EVP_PKEY *PEM_read_bio_Parameters(BIO *bp, EVP_PKEY **x)
95{
96 EVP_PKEY *ret = NULL;
97 OSSL_STORE_CTX *ctx = NULL;
98 OSSL_STORE_INFO *info = NULL;
99
100 if ((ctx = ossl_store_attach_pem_bio(bp, UI_null(), NULL)) == NULL)
101 goto err;
102
103 while (!OSSL_STORE_eof(ctx) && (info = OSSL_STORE_load(ctx)) != NULL) {
104 if (OSSL_STORE_INFO_get_type(info) == OSSL_STORE_INFO_PARAMS) {
105 ret = OSSL_STORE_INFO_get1_PARAMS(info);
106 break;
107 }
108 OSSL_STORE_INFO_free(info);
109 }
110
111 if (ret != NULL && x != NULL)
112 *x = ret;
113
114 err:
115 ossl_store_detach_pem_bio(ctx);
116 OSSL_STORE_INFO_free(info);
117 return ret;
118}
119
120PEM_write_fnsig(Parameters, EVP_PKEY, BIO, write_bio)
121{
122 char pem_str[80];
123 IMPLEMENT_PEM_provided_write_body_vars(EVP_PKEY, Parameters);
124
125 IMPLEMENT_PEM_provided_write_body_main(EVP_PKEY, bio);
126
127 legacy:
128 if (!x->ameth || !x->ameth->param_encode)
129 return 0;
130
131 BIO_snprintf(pem_str, 80, "%s PARAMETERS", x->ameth->pem_str);
132 return PEM_ASN1_write_bio((i2d_of_void *)x->ameth->param_encode,
133 pem_str, out, x, NULL, NULL, 0, 0, NULL);
134}
135
136#ifndef OPENSSL_NO_STDIO
137EVP_PKEY *PEM_read_PrivateKey(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,
138 void *u)
139{
140 BIO *b;
141 EVP_PKEY *ret;
142
143 if ((b = BIO_new(BIO_s_file())) == NULL) {
144 PEMerr(PEM_F_PEM_READ_PRIVATEKEY, ERR_R_BUF_LIB);
145 return 0;
146 }
147 BIO_set_fp(b, fp, BIO_NOCLOSE);
148 ret = PEM_read_bio_PrivateKey(b, x, cb, u);
149 BIO_free(b);
150 return ret;
151}
152
153int PEM_write_PrivateKey(FILE *fp, const EVP_PKEY *x, const EVP_CIPHER *enc,
154 const unsigned char *kstr, int klen,
155 pem_password_cb *cb, void *u)
156{
157 BIO *b;
158 int ret;
159
160 if ((b = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
161 PEMerr(PEM_F_PEM_WRITE_PRIVATEKEY, ERR_R_BUF_LIB);
162 return 0;
163 }
164 ret = PEM_write_bio_PrivateKey(b, x, enc, kstr, klen, cb, u);
165 BIO_free(b);
166 return ret;
167}
168
169#endif
170
171#ifndef OPENSSL_NO_DH
172
173/* Transparently read in PKCS#3 or X9.42 DH parameters */
174
175DH *PEM_read_bio_DHparams(BIO *bp, DH **x, pem_password_cb *cb, void *u)
176{
177 DH *ret = NULL;
178 EVP_PKEY *pkey = NULL;
179 OSSL_STORE_CTX *ctx = NULL;
180 OSSL_STORE_INFO *info = NULL;
181 UI_METHOD *ui_method = NULL;
182
183 if ((ui_method = UI_UTIL_wrap_read_pem_callback(cb, 0)) == NULL)
184 return NULL;
185
186 if ((ctx = ossl_store_attach_pem_bio(bp, ui_method, u)) == NULL)
187 goto err;
188
189 while (!OSSL_STORE_eof(ctx) && (info = OSSL_STORE_load(ctx)) != NULL) {
190 if (OSSL_STORE_INFO_get_type(info) == OSSL_STORE_INFO_PARAMS) {
191 pkey = OSSL_STORE_INFO_get0_PARAMS(info);
192 if (EVP_PKEY_id(pkey) == EVP_PKEY_DHX
193 || EVP_PKEY_id(pkey) == EVP_PKEY_DH) {
194 ret = EVP_PKEY_get1_DH(pkey);
195 break;
196 }
197 }
198 OSSL_STORE_INFO_free(info);
199 }
200
201 if (ret != NULL && x != NULL)
202 *x = ret;
203
204 err:
205 ossl_store_detach_pem_bio(ctx);
206 UI_destroy_method(ui_method);
207 OSSL_STORE_INFO_free(info);
208 return ret;
209}
210
211# ifndef OPENSSL_NO_STDIO
212DH *PEM_read_DHparams(FILE *fp, DH **x, pem_password_cb *cb, void *u)
213{
214 BIO *b;
215 DH *ret;
216
217 if ((b = BIO_new(BIO_s_file())) == NULL) {
218 PEMerr(PEM_F_PEM_READ_DHPARAMS, ERR_R_BUF_LIB);
219 return 0;
220 }
221 BIO_set_fp(b, fp, BIO_NOCLOSE);
222 ret = PEM_read_bio_DHparams(b, x, cb, u);
223 BIO_free(b);
224 return ret;
225}
226# endif
227
228#endif
229