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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 "internal/asn1_int.h" | |
70 | ||
71 | EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp, | |
72 | long length) | |
73 | { | |
74 | EVP_PKEY *ret; | |
75 | ||
76 | if ((a == NULL) || (*a == NULL)) { | |
77 | if ((ret = EVP_PKEY_new()) == NULL) { | |
78 | ASN1err(ASN1_F_D2I_PRIVATEKEY, ERR_R_EVP_LIB); | |
79 | return (NULL); | |
80 | } | |
81 | } else { | |
82 | ret = *a; | |
83 | #ifndef OPENSSL_NO_ENGINE | |
84 | if (ret->engine) { | |
85 | ENGINE_finish(ret->engine); | |
86 | ret->engine = NULL; | |
87 | } | |
88 | #endif | |
89 | } | |
90 | ||
91 | if (!EVP_PKEY_set_type(ret, type)) { | |
92 | ASN1err(ASN1_F_D2I_PRIVATEKEY, ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE); | |
93 | goto err; | |
94 | } | |
95 | ||
96 | if (!ret->ameth->old_priv_decode || | |
97 | !ret->ameth->old_priv_decode(ret, pp, length)) { | |
98 | if (ret->ameth->priv_decode) { | |
99 | PKCS8_PRIV_KEY_INFO *p8 = NULL; | |
100 | p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, pp, length); | |
101 | if (!p8) | |
102 | goto err; | |
103 | EVP_PKEY_free(ret); | |
104 | ret = EVP_PKCS82PKEY(p8); | |
105 | PKCS8_PRIV_KEY_INFO_free(p8); | |
106 | ||
107 | } else { | |
108 | ASN1err(ASN1_F_D2I_PRIVATEKEY, ERR_R_ASN1_LIB); | |
109 | goto err; | |
110 | } | |
111 | } | |
112 | if (a != NULL) | |
113 | (*a) = ret; | |
114 | return (ret); | |
115 | err: | |
116 | if ((ret != NULL) && ((a == NULL) || (*a != ret))) | |
117 | 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 | 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 | 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 | 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 | if (sk_ASN1_TYPE_num(inkey) == 6) | |
144 | keytype = EVP_PKEY_DSA; | |
145 | else if (sk_ASN1_TYPE_num(inkey) == 4) | |
146 | keytype = EVP_PKEY_EC; | |
147 | else if (sk_ASN1_TYPE_num(inkey) == 3) { /* This seems to be PKCS8, not | |
148 | * traditional format */ | |
149 | PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, pp, length); | |
150 | EVP_PKEY *ret; | |
151 | ||
152 | sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free); | |
153 | if (!p8) { | |
154 | ASN1err(ASN1_F_D2I_AUTOPRIVATEKEY, | |
155 | ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE); | |
156 | return NULL; | |
157 | } | |
158 | ret = EVP_PKCS82PKEY(p8); | |
159 | PKCS8_PRIV_KEY_INFO_free(p8); | |
160 | if (a) { | |
161 | *a = ret; | |
162 | } | |
163 | return ret; | |
164 | } else | |
165 | keytype = EVP_PKEY_RSA; | |
166 | sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free); | |
167 | return d2i_PrivateKey(keytype, a, pp, length); | |
168 | } |