Line data Source code
1 : /* crypto/asn1/d2i_pr.c */
2 : /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 : * All rights reserved.
4 : *
5 : * This package is an SSL implementation written
6 : * by Eric Young (eay@cryptsoft.com).
7 : * The implementation was written so as to conform with Netscapes SSL.
8 : *
9 : * This library is free for commercial and non-commercial use as long as
10 : * the following conditions are aheared to. The following conditions
11 : * apply to all code found in this distribution, be it the RC4, RSA,
12 : * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 : * included with this distribution is covered by the same copyright terms
14 : * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 : *
16 : * Copyright remains Eric Young's, and as such any Copyright notices in
17 : * the code are not to be removed.
18 : * If this package is used in a product, Eric Young should be given attribution
19 : * as the author of the parts of the library used.
20 : * This can be in the form of a textual message at program startup or
21 : * in documentation (online or textual) provided with the package.
22 : *
23 : * Redistribution and use in source and binary forms, with or without
24 : * modification, are permitted provided that the following conditions
25 : * are met:
26 : * 1. Redistributions of source code must retain the copyright
27 : * notice, this list of conditions and the following disclaimer.
28 : * 2. Redistributions in binary form must reproduce the above copyright
29 : * notice, this list of conditions and the following disclaimer in the
30 : * documentation and/or other materials provided with the distribution.
31 : * 3. All advertising materials mentioning features or use of this software
32 : * must display the following acknowledgement:
33 : * "This product includes cryptographic software written by
34 : * Eric Young (eay@cryptsoft.com)"
35 : * The word 'cryptographic' can be left out if the rouines from the library
36 : * being used are not cryptographic related :-).
37 : * 4. If you include any Windows specific code (or a derivative thereof) from
38 : * the apps directory (application code) you must include an acknowledgement:
39 : * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 : *
41 : * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 : * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 : * SUCH DAMAGE.
52 : *
53 : * The licence and distribution terms for any publically available version or
54 : * derivative of this code cannot be changed. i.e. this code cannot simply be
55 : * copied and put under another distribution licence
56 : * [including the GNU Public Licence.]
57 : */
58 :
59 : #include <stdio.h>
60 : #include "cryptlib.h"
61 : #include <openssl/bn.h>
62 : #include <openssl/evp.h>
63 : #include <openssl/objects.h>
64 : #ifndef OPENSSL_NO_ENGINE
65 : # include <openssl/engine.h>
66 : #endif
67 : #include <openssl/x509.h>
68 : #include <openssl/asn1.h>
69 : #include "asn1_locl.h"
70 :
71 438 : EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp,
72 : long length)
73 : {
74 : EVP_PKEY *ret;
75 :
76 438 : if ((a == NULL) || (*a == NULL)) {
77 438 : if ((ret = EVP_PKEY_new()) == NULL) {
78 0 : ASN1err(ASN1_F_D2I_PRIVATEKEY, ERR_R_EVP_LIB);
79 0 : return (NULL);
80 : }
81 : } else {
82 : ret = *a;
83 : #ifndef OPENSSL_NO_ENGINE
84 0 : if (ret->engine) {
85 0 : ENGINE_finish(ret->engine);
86 0 : ret->engine = NULL;
87 : }
88 : #endif
89 : }
90 :
91 438 : if (!EVP_PKEY_set_type(ret, type)) {
92 0 : ASN1err(ASN1_F_D2I_PRIVATEKEY, ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
93 0 : goto err;
94 : }
95 :
96 876 : if (!ret->ameth->old_priv_decode ||
97 438 : !ret->ameth->old_priv_decode(ret, pp, length)) {
98 0 : if (ret->ameth->priv_decode) {
99 : PKCS8_PRIV_KEY_INFO *p8 = NULL;
100 0 : p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, pp, length);
101 0 : if (!p8)
102 : goto err;
103 0 : EVP_PKEY_free(ret);
104 0 : ret = EVP_PKCS82PKEY(p8);
105 0 : PKCS8_PRIV_KEY_INFO_free(p8);
106 :
107 : } else {
108 0 : ASN1err(ASN1_F_D2I_PRIVATEKEY, ERR_R_ASN1_LIB);
109 0 : goto err;
110 : }
111 : }
112 438 : if (a != NULL)
113 0 : (*a) = ret;
114 438 : return (ret);
115 : err:
116 0 : if ((ret != NULL) && ((a == NULL) || (*a != ret)))
117 0 : EVP_PKEY_free(ret);
118 : return (NULL);
119 : }
120 :
121 : /*
122 : * This works like d2i_PrivateKey() except it automatically works out the
123 : * type
124 : */
125 :
126 0 : EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp,
127 : long length)
128 : {
129 : STACK_OF(ASN1_TYPE) *inkey;
130 : const unsigned char *p;
131 : int keytype;
132 0 : p = *pp;
133 : /*
134 : * Dirty trick: read in the ASN1 data into a STACK_OF(ASN1_TYPE): by
135 : * analyzing it we can determine the passed structure: this assumes the
136 : * input is surrounded by an ASN1 SEQUENCE.
137 : */
138 0 : inkey = d2i_ASN1_SEQUENCE_ANY(NULL, &p, length);
139 : /*
140 : * Since we only need to discern "traditional format" RSA and DSA keys we
141 : * can just count the elements.
142 : */
143 0 : if (sk_ASN1_TYPE_num(inkey) == 6)
144 : keytype = EVP_PKEY_DSA;
145 0 : else if (sk_ASN1_TYPE_num(inkey) == 4)
146 : keytype = EVP_PKEY_EC;
147 0 : else if (sk_ASN1_TYPE_num(inkey) == 3) { /* This seems to be PKCS8, not
148 : * traditional format */
149 0 : PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, pp, length);
150 : EVP_PKEY *ret;
151 :
152 0 : sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
153 0 : if (!p8) {
154 0 : ASN1err(ASN1_F_D2I_AUTOPRIVATEKEY,
155 : ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
156 0 : return NULL;
157 : }
158 0 : ret = EVP_PKCS82PKEY(p8);
159 0 : PKCS8_PRIV_KEY_INFO_free(p8);
160 0 : if (a) {
161 0 : *a = ret;
162 : }
163 0 : return ret;
164 : } else
165 : keytype = EVP_PKEY_RSA;
166 0 : sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
167 0 : return d2i_PrivateKey(keytype, a, pp, length);
168 : }
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