1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57 #include <openssl/evp.h>
58
59 #include <openssl/asn1.h>
60 #include <openssl/err.h>
61 #include <openssl/obj.h>
62 #include <openssl/x509.h>
63
64 #include "internal.h"
65
66
d2i_PrivateKey(int type,EVP_PKEY ** out,const uint8_t ** inp,long len)67 EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **out, const uint8_t **inp,
68 long len) {
69 EVP_PKEY *ret;
70
71 if (out == NULL || *out == NULL) {
72 ret = EVP_PKEY_new();
73 if (ret == NULL) {
74 OPENSSL_PUT_ERROR(EVP, ERR_R_EVP_LIB);
75 return NULL;
76 }
77 } else {
78 ret = *out;
79 }
80
81 if (!EVP_PKEY_set_type(ret, type)) {
82 OPENSSL_PUT_ERROR(EVP, EVP_R_UNKNOWN_PUBLIC_KEY_TYPE);
83 goto err;
84 }
85
86 const uint8_t *in = *inp;
87 if (!ret->ameth->old_priv_decode ||
88 !ret->ameth->old_priv_decode(ret, &in, len)) {
89 if (ret->ameth->priv_decode) {
90 /* Reset |in| in case |old_priv_decode| advanced it on error. */
91 in = *inp;
92 PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, &in, len);
93 if (!p8) {
94 goto err;
95 }
96 EVP_PKEY_free(ret);
97 ret = EVP_PKCS82PKEY(p8);
98 PKCS8_PRIV_KEY_INFO_free(p8);
99 if (ret == NULL) {
100 goto err;
101 }
102 } else {
103 OPENSSL_PUT_ERROR(EVP, ERR_R_ASN1_LIB);
104 goto err;
105 }
106 }
107
108 if (out != NULL) {
109 *out = ret;
110 }
111 *inp = in;
112 return ret;
113
114 err:
115 if (out == NULL || *out != ret) {
116 EVP_PKEY_free(ret);
117 }
118 return NULL;
119 }
120
d2i_AutoPrivateKey(EVP_PKEY ** out,const uint8_t ** inp,long len)121 EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **out, const uint8_t **inp, long len) {
122 STACK_OF(ASN1_TYPE) *inkey;
123 const uint8_t *p;
124 int keytype;
125 p = *inp;
126
127 /* Dirty trick: read in the ASN1 data into out STACK_OF(ASN1_TYPE):
128 * by analyzing it we can determine the passed structure: this
129 * assumes the input is surrounded by an ASN1 SEQUENCE. */
130 inkey = d2i_ASN1_SEQUENCE_ANY(NULL, &p, len);
131 /* Since we only need to discern "traditional format" RSA and DSA
132 * keys we can just count the elements. */
133 if (sk_ASN1_TYPE_num(inkey) == 6) {
134 keytype = EVP_PKEY_DSA;
135 } else if (sk_ASN1_TYPE_num(inkey) == 4) {
136 keytype = EVP_PKEY_EC;
137 } else if (sk_ASN1_TYPE_num(inkey) == 3) {
138 /* This seems to be PKCS8, not traditional format */
139 p = *inp;
140 PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len);
141 EVP_PKEY *ret;
142
143 sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
144 if (!p8) {
145 OPENSSL_PUT_ERROR(EVP, EVP_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
146 return NULL;
147 }
148 ret = EVP_PKCS82PKEY(p8);
149 PKCS8_PRIV_KEY_INFO_free(p8);
150 if (ret == NULL) {
151 return NULL;
152 }
153
154 *inp = p;
155 if (out) {
156 *out = ret;
157 }
158 return ret;
159 } else {
160 keytype = EVP_PKEY_RSA;
161 }
162
163 sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
164 return d2i_PrivateKey(keytype, out, inp, len);
165 }
166
i2d_PublicKey(EVP_PKEY * key,uint8_t ** outp)167 int i2d_PublicKey(EVP_PKEY *key, uint8_t **outp) {
168 switch (key->type) {
169 case EVP_PKEY_RSA:
170 return i2d_RSAPublicKey(key->pkey.rsa, outp);
171 case EVP_PKEY_DSA:
172 return i2d_DSAPublicKey(key->pkey.dsa, outp);
173 case EVP_PKEY_EC:
174 return i2o_ECPublicKey(key->pkey.ec, outp);
175 default:
176 OPENSSL_PUT_ERROR(EVP, EVP_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
177 return -1;
178 }
179 }
180