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 | |
19 | static int do_pk8pkey(BIO *bp, const EVP_PKEY *x, int isder, |
20 | int nid, const EVP_CIPHER *enc, |
21 | const char *kstr, int klen, |
22 | pem_password_cb *cb, void *u); |
23 | |
24 | #ifndef OPENSSL_NO_STDIO |
25 | static int do_pk8pkey_fp(FILE *bp, const EVP_PKEY *x, int isder, |
26 | int nid, const EVP_CIPHER *enc, |
27 | const char *kstr, int klen, |
28 | pem_password_cb *cb, void *u); |
29 | #endif |
30 | /* |
31 | * These functions write a private key in PKCS#8 format: it is a "drop in" |
32 | * replacement for PEM_write_bio_PrivateKey() and friends. As usual if 'enc' |
33 | * is NULL then it uses the unencrypted private key form. The 'nid' versions |
34 | * uses PKCS#5 v1.5 PBE algorithms whereas the others use PKCS#5 v2.0. |
35 | */ |
36 | |
37 | int PEM_write_bio_PKCS8PrivateKey_nid(BIO *bp, const EVP_PKEY *x, int nid, |
38 | const char *kstr, int klen, |
39 | pem_password_cb *cb, void *u) |
40 | { |
41 | return do_pk8pkey(bp, x, 0, nid, NULL, kstr, klen, cb, u); |
42 | } |
43 | |
44 | int PEM_write_bio_PKCS8PrivateKey(BIO *bp, const EVP_PKEY *x, const EVP_CIPHER *enc, |
45 | const char *kstr, int klen, |
46 | pem_password_cb *cb, void *u) |
47 | { |
48 | return do_pk8pkey(bp, x, 0, -1, enc, kstr, klen, cb, u); |
49 | } |
50 | |
51 | int i2d_PKCS8PrivateKey_bio(BIO *bp, const EVP_PKEY *x, const EVP_CIPHER *enc, |
52 | const char *kstr, int klen, |
53 | pem_password_cb *cb, void *u) |
54 | { |
55 | return do_pk8pkey(bp, x, 1, -1, enc, kstr, klen, cb, u); |
56 | } |
57 | |
58 | int i2d_PKCS8PrivateKey_nid_bio(BIO *bp, const EVP_PKEY *x, int nid, |
59 | const char *kstr, int klen, |
60 | pem_password_cb *cb, void *u) |
61 | { |
62 | return do_pk8pkey(bp, x, 1, nid, NULL, kstr, klen, cb, u); |
63 | } |
64 | |
65 | static int do_pk8pkey(BIO *bp, const EVP_PKEY *x, int isder, int nid, |
66 | const EVP_CIPHER *enc, const char *kstr, int klen, |
67 | pem_password_cb *cb, void *u) |
68 | { |
69 | X509_SIG *p8; |
70 | PKCS8_PRIV_KEY_INFO *p8inf; |
71 | char buf[PEM_BUFSIZE]; |
72 | int ret; |
73 | |
74 | if ((p8inf = EVP_PKEY2PKCS8(x)) == NULL) { |
75 | PEMerr(PEM_F_DO_PK8PKEY, PEM_R_ERROR_CONVERTING_PRIVATE_KEY); |
76 | return 0; |
77 | } |
78 | if (enc || (nid != -1)) { |
79 | if (!kstr) { |
80 | if (!cb) |
81 | klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u); |
82 | else |
83 | klen = cb(buf, PEM_BUFSIZE, 1, u); |
84 | if (klen <= 0) { |
85 | PEMerr(PEM_F_DO_PK8PKEY, PEM_R_READ_KEY); |
86 | PKCS8_PRIV_KEY_INFO_free(p8inf); |
87 | return 0; |
88 | } |
89 | |
90 | kstr = buf; |
91 | } |
92 | p8 = PKCS8_encrypt(nid, enc, kstr, klen, NULL, 0, 0, p8inf); |
93 | if (kstr == buf) |
94 | OPENSSL_cleanse(buf, klen); |
95 | PKCS8_PRIV_KEY_INFO_free(p8inf); |
96 | if (p8 == NULL) |
97 | return 0; |
98 | if (isder) |
99 | ret = i2d_PKCS8_bio(bp, p8); |
100 | else |
101 | ret = PEM_write_bio_PKCS8(bp, p8); |
102 | X509_SIG_free(p8); |
103 | return ret; |
104 | } else { |
105 | if (isder) |
106 | ret = i2d_PKCS8_PRIV_KEY_INFO_bio(bp, p8inf); |
107 | else |
108 | ret = PEM_write_bio_PKCS8_PRIV_KEY_INFO(bp, p8inf); |
109 | PKCS8_PRIV_KEY_INFO_free(p8inf); |
110 | return ret; |
111 | } |
112 | } |
113 | |
114 | EVP_PKEY *d2i_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY **x, pem_password_cb *cb, |
115 | void *u) |
116 | { |
117 | PKCS8_PRIV_KEY_INFO *p8inf = NULL; |
118 | X509_SIG *p8 = NULL; |
119 | int klen; |
120 | EVP_PKEY *ret; |
121 | char psbuf[PEM_BUFSIZE]; |
122 | |
123 | p8 = d2i_PKCS8_bio(bp, NULL); |
124 | if (p8 == NULL) |
125 | return NULL; |
126 | if (cb != NULL) |
127 | klen = cb(psbuf, PEM_BUFSIZE, 0, u); |
128 | else |
129 | klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u); |
130 | if (klen < 0) { |
131 | PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_BIO, PEM_R_BAD_PASSWORD_READ); |
132 | X509_SIG_free(p8); |
133 | return NULL; |
134 | } |
135 | p8inf = PKCS8_decrypt(p8, psbuf, klen); |
136 | X509_SIG_free(p8); |
137 | OPENSSL_cleanse(psbuf, klen); |
138 | if (p8inf == NULL) |
139 | return NULL; |
140 | ret = EVP_PKCS82PKEY(p8inf); |
141 | PKCS8_PRIV_KEY_INFO_free(p8inf); |
142 | if (!ret) |
143 | return NULL; |
144 | if (x != NULL) { |
145 | EVP_PKEY_free(*x); |
146 | *x = ret; |
147 | } |
148 | return ret; |
149 | } |
150 | |
151 | #ifndef OPENSSL_NO_STDIO |
152 | |
153 | int i2d_PKCS8PrivateKey_fp(FILE *fp, const EVP_PKEY *x, const EVP_CIPHER *enc, |
154 | const char *kstr, int klen, |
155 | pem_password_cb *cb, void *u) |
156 | { |
157 | return do_pk8pkey_fp(fp, x, 1, -1, enc, kstr, klen, cb, u); |
158 | } |
159 | |
160 | int i2d_PKCS8PrivateKey_nid_fp(FILE *fp, const EVP_PKEY *x, int nid, |
161 | const char *kstr, int klen, |
162 | pem_password_cb *cb, void *u) |
163 | { |
164 | return do_pk8pkey_fp(fp, x, 1, nid, NULL, kstr, klen, cb, u); |
165 | } |
166 | |
167 | int PEM_write_PKCS8PrivateKey_nid(FILE *fp, const EVP_PKEY *x, int nid, |
168 | const char *kstr, int klen, |
169 | pem_password_cb *cb, void *u) |
170 | { |
171 | return do_pk8pkey_fp(fp, x, 0, nid, NULL, kstr, klen, cb, u); |
172 | } |
173 | |
174 | int PEM_write_PKCS8PrivateKey(FILE *fp, const EVP_PKEY *x, const EVP_CIPHER *enc, |
175 | const char *kstr, int klen, |
176 | pem_password_cb *cb, void *u) |
177 | { |
178 | return do_pk8pkey_fp(fp, x, 0, -1, enc, kstr, klen, cb, u); |
179 | } |
180 | |
181 | static int do_pk8pkey_fp(FILE *fp, const EVP_PKEY *x, int isder, int nid, |
182 | const EVP_CIPHER *enc, const char *kstr, int klen, |
183 | pem_password_cb *cb, void *u) |
184 | { |
185 | BIO *bp; |
186 | int ret; |
187 | |
188 | if ((bp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) { |
189 | PEMerr(PEM_F_DO_PK8PKEY_FP, ERR_R_BUF_LIB); |
190 | return 0; |
191 | } |
192 | ret = do_pk8pkey(bp, x, isder, nid, enc, kstr, klen, cb, u); |
193 | BIO_free(bp); |
194 | return ret; |
195 | } |
196 | |
197 | EVP_PKEY *d2i_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY **x, pem_password_cb *cb, |
198 | void *u) |
199 | { |
200 | BIO *bp; |
201 | EVP_PKEY *ret; |
202 | |
203 | if ((bp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) { |
204 | PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_FP, ERR_R_BUF_LIB); |
205 | return NULL; |
206 | } |
207 | ret = d2i_PKCS8PrivateKey_bio(bp, x, cb, u); |
208 | BIO_free(bp); |
209 | return ret; |
210 | } |
211 | |
212 | #endif |
213 | |
214 | IMPLEMENT_PEM_rw(PKCS8, X509_SIG, PEM_STRING_PKCS8, X509_SIG) |
215 | |
216 | |
217 | IMPLEMENT_PEM_rw(PKCS8_PRIV_KEY_INFO, PKCS8_PRIV_KEY_INFO, PEM_STRING_PKCS8INF, |
218 | PKCS8_PRIV_KEY_INFO) |
219 | |