Line data Source code
1 : /* signers.c - Maintain signer sets.
2 : Copyright (C) 2001 Werner Koch (dd9jn)
3 : Copyright (C) 2001, 2002, 2003, 2004 g10 Code GmbH
4 :
5 : This file is part of GPGME.
6 :
7 : GPGME is free software; you can redistribute it and/or modify it
8 : under the terms of the GNU Lesser General Public License as
9 : published by the Free Software Foundation; either version 2.1 of
10 : the License, or (at your option) any later version.
11 :
12 : GPGME is distributed in the hope that it will be useful, but
13 : WITHOUT ANY WARRANTY; without even the implied warranty of
14 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 : Lesser General Public License for more details.
16 :
17 : You should have received a copy of the GNU Lesser General Public
18 : License along with this program; if not, write to the Free Software
19 : Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20 : 02111-1307, USA. */
21 :
22 : #if HAVE_CONFIG_H
23 : #include <config.h>
24 : #endif
25 :
26 : #include <stdio.h>
27 : #include <stdlib.h>
28 : #include <assert.h>
29 : #include <errno.h>
30 :
31 : #include "gpgme.h"
32 : #include "util.h"
33 : #include "context.h"
34 : #include "debug.h"
35 :
36 :
37 : /* Delete all signers from CTX. */
38 : void
39 903 : _gpgme_signers_clear (gpgme_ctx_t ctx)
40 : {
41 : unsigned int i;
42 :
43 903 : if (!ctx || !ctx->signers)
44 877 : return;
45 :
46 59 : for (i = 0; i < ctx->signers_len; i++)
47 : {
48 33 : assert (ctx->signers[i]);
49 33 : gpgme_key_unref (ctx->signers[i]);
50 33 : ctx->signers[i] = NULL;
51 : }
52 26 : ctx->signers_len = 0;
53 : }
54 :
55 :
56 : void
57 188 : gpgme_signers_clear (gpgme_ctx_t ctx)
58 : {
59 188 : TRACE (DEBUG_CTX, "gpgme_signers_clear", ctx);
60 188 : _gpgme_signers_clear (ctx);
61 188 : }
62 :
63 :
64 : /* Add KEY to list of signers in CTX. */
65 : gpgme_error_t
66 33 : gpgme_signers_add (gpgme_ctx_t ctx, const gpgme_key_t key)
67 : {
68 33 : TRACE_BEG2 (DEBUG_CTX, "gpgme_signers_add", ctx,
69 : "key=%p (%s)", key, (key && key->subkeys && key->subkeys->fpr) ?
70 : key->subkeys->fpr : "invalid");
71 :
72 33 : if (!ctx || !key)
73 0 : return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
74 :
75 33 : if (ctx->signers_len == ctx->signers_size)
76 : {
77 : gpgme_key_t *newarr;
78 18 : int n = ctx->signers_size + 5;
79 : int j;
80 :
81 18 : newarr = realloc (ctx->signers, n * sizeof (*newarr));
82 18 : if (!newarr)
83 0 : return TRACE_ERR (gpg_error_from_syserror ());
84 108 : for (j = ctx->signers_size; j < n; j++)
85 90 : newarr[j] = NULL;
86 18 : ctx->signers = newarr;
87 18 : ctx->signers_size = n;
88 : }
89 :
90 33 : gpgme_key_ref (key);
91 33 : ctx->signers[ctx->signers_len++] = key;
92 33 : return TRACE_SUC ();
93 : }
94 :
95 :
96 : /* Return the number of signers in CTX. */
97 : unsigned int
98 274 : gpgme_signers_count (const gpgme_ctx_t ctx)
99 : {
100 274 : return ctx? ctx->signers_len : 0;
101 : }
102 :
103 :
104 : /* Return the SEQth signer's key in CTX with one reference. */
105 : gpgme_key_t
106 151 : gpgme_signers_enum (const gpgme_ctx_t ctx, int seq)
107 : {
108 : unsigned int seqno;
109 :
110 151 : if (!ctx || seq < 0)
111 0 : return NULL;
112 :
113 151 : seqno = (unsigned int) seq;
114 151 : if (seqno >= ctx->signers_len)
115 86 : return NULL;
116 65 : gpgme_key_ref (ctx->signers[seqno]);
117 65 : return ctx->signers[seqno];
118 : }
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