1 /*	$OpenBSD: dsa_meth.c,v 1.5 2022/07/11 05:33:14 bcook Exp $	*/
2 /*
3  * Copyright (c) 2018 Theo Buehler <tb@openbsd.org>
4  *
5  * Permission to use, copy, modify, and distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17 
18 #include <stdlib.h>
19 #include <string.h>
20 
21 #include <openssl/dsa.h>
22 #include <openssl/err.h>
23 
24 #include "dsa_locl.h"
25 
26 DSA_METHOD *
27 DSA_meth_new(const char *name, int flags)
28 {
29 	DSA_METHOD *meth;
30 
31 	if ((meth = calloc(1, sizeof(*meth))) == NULL)
32 		return NULL;
33 	if ((meth->name = strdup(name)) == NULL) {
34 		free(meth);
35 		return NULL;
36 	}
37 	meth->flags = flags;
38 
39 	return meth;
40 }
41 
42 void
43 DSA_meth_free(DSA_METHOD *meth)
44 {
45 	if (meth == NULL)
46 		return;
47 
48 	free(meth->name);
49 	free(meth);
50 }
51 
52 DSA_METHOD *
53 DSA_meth_dup(const DSA_METHOD *meth)
54 {
55 	DSA_METHOD *copy;
56 
57 	if ((copy = calloc(1, sizeof(*copy))) == NULL)
58 		return NULL;
59 	memcpy(copy, meth, sizeof(*copy));
60 	if ((copy->name = strdup(meth->name)) == NULL) {
61 		free(copy);
62 		return NULL;
63 	}
64 
65 	return copy;
66 }
67 
68 const char *
69 DSA_meth_get0_name(const DSA_METHOD *meth)
70 {
71 	return meth->name;
72 }
73 
74 int
75 DSA_meth_set1_name(DSA_METHOD *meth, const char *name)
76 {
77 	char *new_name;
78 
79 	if ((new_name = strdup(name)) == NULL) {
80 		DSAerror(ERR_R_MALLOC_FAILURE);
81 		return 0;
82 	}
83 
84 	free(meth->name);
85 	meth->name = new_name;
86 
87 	return 1;
88 }
89 
90 int
91 DSA_meth_set_sign(DSA_METHOD *meth,
92     DSA_SIG *(*sign)(const unsigned char *, int, DSA *))
93 {
94 	meth->dsa_do_sign = sign;
95 	return 1;
96 }
97 
98 int
99 DSA_meth_set_finish(DSA_METHOD *meth, int (*finish)(DSA *))
100 {
101 	meth->finish = finish;
102 	return 1;
103 }
104