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1 | /* pmeth_lib.c */ |
2 | /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL | |
3 | * project 2006. | |
4 | */ | |
5 | /* ==================================================================== | |
6 | * Copyright (c) 2006 The OpenSSL Project. All rights reserved. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * | |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in | |
17 | * the documentation and/or other materials provided with the | |
18 | * distribution. | |
19 | * | |
20 | * 3. All advertising materials mentioning features or use of this | |
21 | * software must display the following acknowledgment: | |
22 | * "This product includes software developed by the OpenSSL Project | |
23 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
24 | * | |
25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
26 | * endorse or promote products derived from this software without | |
27 | * prior written permission. For written permission, please contact | |
28 | * licensing@OpenSSL.org. | |
29 | * | |
30 | * 5. Products derived from this software may not be called "OpenSSL" | |
31 | * nor may "OpenSSL" appear in their names without prior written | |
32 | * permission of the OpenSSL Project. | |
33 | * | |
34 | * 6. Redistributions of any form whatsoever must retain the following | |
35 | * acknowledgment: | |
36 | * "This product includes software developed by the OpenSSL Project | |
37 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
38 | * | |
39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
50 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
51 | * ==================================================================== | |
52 | * | |
53 | * This product includes cryptographic software written by Eric Young | |
54 | * (eay@cryptsoft.com). This product includes software written by Tim | |
55 | * Hudson (tjh@cryptsoft.com). | |
56 | * | |
57 | */ | |
58 | ||
59 | #include <stdio.h> | |
60 | #include <stdlib.h> | |
61 | #include <openssl/objects.h> | |
62 | #include "cryptlib.h" | |
63 | #include "evp_locl.h" | |
64 | ||
65 | STACK *app_pkey_methods = NULL; | |
66 | ||
67 | extern EVP_PKEY_METHOD rsa_pkey_meth; | |
68 | ||
69 | const EVP_PKEY_METHOD *standard_methods[] = | |
70 | { | |
71 | &rsa_pkey_meth | |
72 | }; | |
73 | ||
74 | static int pmeth_cmp(const EVP_PKEY_METHOD * const *a, | |
75 | const EVP_PKEY_METHOD * const *b) | |
76 | { | |
77 | return ((*a)->pkey_id - (*b)->pkey_id); | |
78 | } | |
79 | ||
80 | const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type, ENGINE *e) | |
81 | { | |
82 | EVP_PKEY_METHOD tmp, *t = &tmp, **ret; | |
83 | tmp.pkey_id = type; | |
84 | if (app_pkey_methods) | |
85 | { | |
86 | int idx; | |
87 | idx = sk_find(app_pkey_methods, (char *)&tmp); | |
88 | if (idx >= 0) | |
89 | return (EVP_PKEY_METHOD *) | |
90 | sk_value(app_pkey_methods, idx); | |
91 | } | |
92 | ret = (EVP_PKEY_METHOD **) OBJ_bsearch((char *)&t, | |
93 | (char *)standard_methods, | |
94 | sizeof(standard_methods)/sizeof(EVP_PKEY_METHOD *), | |
95 | sizeof(EVP_PKEY_METHOD *), | |
96 | (int (*)(const void *, const void *))pmeth_cmp); | |
97 | if (!ret || !*ret) | |
98 | return NULL; | |
99 | return *ret; | |
100 | } | |
101 | ||
102 | EVP_PKEY_CTX *EVP_PKEY_CTX_new(int ktype, ENGINE *e) | |
103 | { | |
104 | EVP_PKEY_CTX *ret; | |
105 | const EVP_PKEY_METHOD *pmeth; | |
106 | pmeth = EVP_PKEY_meth_find(ktype, e); | |
107 | if (pmeth == NULL) | |
108 | return NULL; | |
109 | ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX)); | |
110 | ret->pmeth = pmeth; | |
111 | ret->operation = EVP_PKEY_OP_UNDEFINED; | |
112 | ret->pkey = NULL; | |
113 | ret->data = NULL; | |
114 | ||
115 | return ret; | |
116 | } | |
117 | ||
118 | int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype, | |
119 | int cmd, int p1, void *p2) | |
120 | { | |
121 | if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) | |
122 | return -2; | |
123 | if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype)) | |
124 | return -1; | |
125 | ||
126 | if (ctx->operation == EVP_PKEY_OP_UNDEFINED) | |
127 | { | |
128 | /* Not initialized */ | |
129 | return -1; | |
130 | } | |
131 | ||
132 | if ((optype != -1) && (ctx->operation != optype)) | |
133 | { | |
134 | /* Invalid operation type */ | |
135 | return -1; | |
136 | } | |
137 | ||
138 | return ctx->pmeth->ctrl(ctx, cmd, p1, p2); | |
139 | ||
140 | } | |
141 | ||
142 | ||
143 | ||
144 | ||
145 | ||
146 |