1 /*
2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (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 "crypto/asn1.h"
21 #include "crypto/evp.h"
22
23 int pem_check_suffix(const char *pem_str, const char *suffix);
24
PEM_read_bio_PrivateKey(BIO * bp,EVP_PKEY ** x,pem_password_cb * cb,void * u)25 EVP_PKEY *PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
26 void *u)
27 {
28 char *nm = NULL;
29 const unsigned char *p = NULL;
30 unsigned char *data = NULL;
31 long len;
32 int slen;
33 EVP_PKEY *ret = NULL;
34
35 if (!PEM_bytes_read_bio_secmem(&data, &len, &nm, PEM_STRING_EVP_PKEY, bp,
36 cb, u))
37 return NULL;
38 p = data;
39
40 if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) {
41 PKCS8_PRIV_KEY_INFO *p8inf;
42 p8inf = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len);
43 if (!p8inf)
44 goto p8err;
45 ret = EVP_PKCS82PKEY(p8inf);
46 if (x) {
47 EVP_PKEY_free((EVP_PKEY *)*x);
48 *x = ret;
49 }
50 PKCS8_PRIV_KEY_INFO_free(p8inf);
51 } else if (strcmp(nm, PEM_STRING_PKCS8) == 0) {
52 PKCS8_PRIV_KEY_INFO *p8inf;
53 X509_SIG *p8;
54 int klen;
55 char psbuf[PEM_BUFSIZE];
56 p8 = d2i_X509_SIG(NULL, &p, len);
57 if (!p8)
58 goto p8err;
59 if (cb)
60 klen = cb(psbuf, PEM_BUFSIZE, 0, u);
61 else
62 klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
63 if (klen < 0) {
64 PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, PEM_R_BAD_PASSWORD_READ);
65 X509_SIG_free(p8);
66 goto err;
67 }
68 p8inf = PKCS8_decrypt(p8, psbuf, klen);
69 X509_SIG_free(p8);
70 OPENSSL_cleanse(psbuf, klen);
71 if (!p8inf)
72 goto p8err;
73 ret = EVP_PKCS82PKEY(p8inf);
74 if (x) {
75 EVP_PKEY_free((EVP_PKEY *)*x);
76 *x = ret;
77 }
78 PKCS8_PRIV_KEY_INFO_free(p8inf);
79 } else if ((slen = pem_check_suffix(nm, "PRIVATE KEY")) > 0) {
80 const EVP_PKEY_ASN1_METHOD *ameth;
81 ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
82 if (!ameth || !ameth->old_priv_decode)
83 goto p8err;
84 ret = d2i_PrivateKey(ameth->pkey_id, x, &p, len);
85 }
86 p8err:
87 if (ret == NULL)
88 PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, ERR_R_ASN1_LIB);
89 err:
90 OPENSSL_secure_free(nm);
91 OPENSSL_secure_clear_free(data, len);
92 return ret;
93 }
94
PEM_write_bio_PrivateKey(BIO * bp,EVP_PKEY * x,const EVP_CIPHER * enc,unsigned char * kstr,int klen,pem_password_cb * cb,void * u)95 int PEM_write_bio_PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
96 unsigned char *kstr, int klen,
97 pem_password_cb *cb, void *u)
98 {
99 if (x->ameth == NULL || x->ameth->priv_encode != NULL)
100 return PEM_write_bio_PKCS8PrivateKey(bp, x, enc,
101 (char *)kstr, klen, cb, u);
102 return PEM_write_bio_PrivateKey_traditional(bp, x, enc, kstr, klen, cb, u);
103 }
104
PEM_write_bio_PrivateKey_traditional(BIO * bp,EVP_PKEY * x,const EVP_CIPHER * enc,unsigned char * kstr,int klen,pem_password_cb * cb,void * u)105 int PEM_write_bio_PrivateKey_traditional(BIO *bp, EVP_PKEY *x,
106 const EVP_CIPHER *enc,
107 unsigned char *kstr, int klen,
108 pem_password_cb *cb, void *u)
109 {
110 char pem_str[80];
111
112 if (x->ameth == NULL || x->ameth->old_priv_encode == NULL) {
113 PEMerr(PEM_F_PEM_WRITE_BIO_PRIVATEKEY_TRADITIONAL,
114 PEM_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
115 return 0;
116 }
117 BIO_snprintf(pem_str, 80, "%s PRIVATE KEY", x->ameth->pem_str);
118 return PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey,
119 pem_str, bp, x, enc, kstr, klen, cb, u);
120 }
121
PEM_read_bio_Parameters(BIO * bp,EVP_PKEY ** x)122 EVP_PKEY *PEM_read_bio_Parameters(BIO *bp, EVP_PKEY **x)
123 {
124 char *nm = NULL;
125 const unsigned char *p = NULL;
126 unsigned char *data = NULL;
127 long len;
128 int slen;
129 EVP_PKEY *ret = NULL;
130
131 if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_PARAMETERS,
132 bp, 0, NULL))
133 return NULL;
134 p = data;
135
136 if ((slen = pem_check_suffix(nm, "PARAMETERS")) > 0) {
137 ret = EVP_PKEY_new();
138 if (ret == NULL)
139 goto err;
140 if (!EVP_PKEY_set_type_str(ret, nm, slen)
141 || !ret->ameth->param_decode
142 || !ret->ameth->param_decode(ret, &p, len)) {
143 EVP_PKEY_free(ret);
144 ret = NULL;
145 goto err;
146 }
147 if (x) {
148 EVP_PKEY_free((EVP_PKEY *)*x);
149 *x = ret;
150 }
151 }
152 err:
153 if (ret == NULL)
154 PEMerr(PEM_F_PEM_READ_BIO_PARAMETERS, ERR_R_ASN1_LIB);
155 OPENSSL_free(nm);
156 OPENSSL_free(data);
157 return ret;
158 }
159
PEM_write_bio_Parameters(BIO * bp,EVP_PKEY * x)160 int PEM_write_bio_Parameters(BIO *bp, EVP_PKEY *x)
161 {
162 char pem_str[80];
163 if (!x->ameth || !x->ameth->param_encode)
164 return 0;
165
166 BIO_snprintf(pem_str, 80, "%s PARAMETERS", x->ameth->pem_str);
167 return PEM_ASN1_write_bio((i2d_of_void *)x->ameth->param_encode,
168 pem_str, bp, x, NULL, NULL, 0, 0, NULL);
169 }
170
171 #ifndef OPENSSL_NO_STDIO
PEM_read_PrivateKey(FILE * fp,EVP_PKEY ** x,pem_password_cb * cb,void * u)172 EVP_PKEY *PEM_read_PrivateKey(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,
173 void *u)
174 {
175 BIO *b;
176 EVP_PKEY *ret;
177
178 if ((b = BIO_new(BIO_s_file())) == NULL) {
179 PEMerr(PEM_F_PEM_READ_PRIVATEKEY, ERR_R_BUF_LIB);
180 return 0;
181 }
182 BIO_set_fp(b, fp, BIO_NOCLOSE);
183 ret = PEM_read_bio_PrivateKey(b, x, cb, u);
184 BIO_free(b);
185 return ret;
186 }
187
PEM_write_PrivateKey(FILE * fp,EVP_PKEY * x,const EVP_CIPHER * enc,unsigned char * kstr,int klen,pem_password_cb * cb,void * u)188 int PEM_write_PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
189 unsigned char *kstr, int klen,
190 pem_password_cb *cb, void *u)
191 {
192 BIO *b;
193 int ret;
194
195 if ((b = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
196 PEMerr(PEM_F_PEM_WRITE_PRIVATEKEY, ERR_R_BUF_LIB);
197 return 0;
198 }
199 ret = PEM_write_bio_PrivateKey(b, x, enc, kstr, klen, cb, u);
200 BIO_free(b);
201 return ret;
202 }
203
204 #endif
205
206 #ifndef OPENSSL_NO_DH
207
208 /* Transparently read in PKCS#3 or X9.42 DH parameters */
209
PEM_read_bio_DHparams(BIO * bp,DH ** x,pem_password_cb * cb,void * u)210 DH *PEM_read_bio_DHparams(BIO *bp, DH **x, pem_password_cb *cb, void *u)
211 {
212 char *nm = NULL;
213 const unsigned char *p = NULL;
214 unsigned char *data = NULL;
215 long len;
216 DH *ret = NULL;
217
218 if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_DHPARAMS, bp, cb, u))
219 return NULL;
220 p = data;
221
222 if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0)
223 ret = d2i_DHxparams(x, &p, len);
224 else
225 ret = d2i_DHparams(x, &p, len);
226
227 if (ret == NULL)
228 PEMerr(PEM_F_PEM_READ_BIO_DHPARAMS, ERR_R_ASN1_LIB);
229 OPENSSL_free(nm);
230 OPENSSL_free(data);
231 return ret;
232 }
233
234 # ifndef OPENSSL_NO_STDIO
PEM_read_DHparams(FILE * fp,DH ** x,pem_password_cb * cb,void * u)235 DH *PEM_read_DHparams(FILE *fp, DH **x, pem_password_cb *cb, void *u)
236 {
237 BIO *b;
238 DH *ret;
239
240 if ((b = BIO_new(BIO_s_file())) == NULL) {
241 PEMerr(PEM_F_PEM_READ_DHPARAMS, ERR_R_BUF_LIB);
242 return 0;
243 }
244 BIO_set_fp(b, fp, BIO_NOCLOSE);
245 ret = PEM_read_bio_DHparams(b, x, cb, u);
246 BIO_free(b);
247 return ret;
248 }
249 # endif
250
251 #endif
252