summaryrefslogtreecommitdiff
path: root/src/libstrongswan/credentials/credential_factory.c
blob: 2e9a541d4f85d91dad163607987c9c6ea39762c1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
/*
 * Copyright (C) 2008 Martin Willi
 * Hochschule fuer Technik Rapperswil
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 */

#include "credential_factory.h"

#include <debug.h>
#include <utils/linked_list.h>
#include <utils/mutex.h>
#include <credentials/certificates/x509.h>

ENUM(credential_type_names, CRED_PRIVATE_KEY, CRED_CERTIFICATE,
	"CRED_PRIVATE_KEY",
	"CRED_PUBLIC_KEY",
	"CRED_CERTIFICATE",
);

typedef struct private_credential_factory_t private_credential_factory_t;

/**
 * private data of credential_factory
 */
struct private_credential_factory_t {

	/**
	 * public functions
	 */
	credential_factory_t public;
	
	/**
	 * list with entry_t
	 */
	linked_list_t *constructors;
	
	/**
	 * lock access to builders
	 */
	rwlock_t *lock;
};

typedef struct entry_t entry_t;
struct entry_t {
	/** kind of credential builder */
	credential_type_t type;
	/** subtype of credential, e.g. certificate_type_t */
	int subtype;
	/** builder construction function */
	builder_constructor_t constructor;
};

/**
 * type/subtype filter function for builder_enumerator
 */
static bool builder_filter(entry_t *data, entry_t **in, builder_t **out)
{
	if (data->type == (*in)->type &&
		data->subtype == (*in)->subtype)
	{
		*out = (*in)->constructor(data->subtype);
		return TRUE;
	}
	return FALSE;
}

/**
 * Implementation of credential_factory_t.create_builder_enumerator.
 */
static enumerator_t* create_builder_enumerator(
		private_credential_factory_t *this,	credential_type_t type, int subtype)
{
	entry_t *data = malloc_thing(entry_t);
	
	data->type = type;
	data->subtype = subtype;
	
	this->lock->read_lock(this->lock);
	return enumerator_create_cleaner(
				enumerator_create_filter(
					this->constructors->create_enumerator(this->constructors),
					(void*)builder_filter, data, free), 
				(void*)this->lock->unlock, this->lock);
}

/**
 * Implementation of credential_factory_t.add_builder_constructor.
 */
static void add_builder(private_credential_factory_t *this,
						credential_type_t type, int subtype,
						builder_constructor_t constructor)
{
	entry_t *entry = malloc_thing(entry_t);
	
	entry->type = type;
	entry->subtype = subtype;
	entry->constructor = constructor;
	this->lock->write_lock(this->lock);
	this->constructors->insert_last(this->constructors, entry);
	this->lock->unlock(this->lock);
}

/**
 * Implementation of credential_factory_t.remove_builder.
 */
static void remove_builder(private_credential_factory_t *this,
						   builder_constructor_t constructor)
{
	enumerator_t *enumerator;
	entry_t *entry;
	
	this->lock->write_lock(this->lock);
	enumerator = this->constructors->create_enumerator(this->constructors);
	while (enumerator->enumerate(enumerator, &entry))
	{
		if (entry->constructor == constructor)
		{
			this->constructors->remove_at(this->constructors, enumerator);
			free(entry);
		}
	}
	enumerator->destroy(enumerator);
	this->lock->unlock(this->lock);
}

/**
 * Implementation of credential_factory_t.create.
 */
static void* create(private_credential_factory_t *this, credential_type_t type,
					int subtype, ...)
{
	enumerator_t *enumerator;
	builder_t *builder;
	builder_part_t part;
	va_list args;
	void* construct = NULL;
	
	enumerator = create_builder_enumerator(this, type, subtype);
	while (enumerator->enumerate(enumerator, &builder))
	{
		va_start(args, subtype);
		while (TRUE)
		{
			part = va_arg(args, builder_part_t);
			switch (part)
			{
				case BUILD_END:
					break;
				case BUILD_BLOB_ASN1_DER:
				case BUILD_BLOB_PGP:
				case BUILD_BLOB_RFC_3110:
				case BUILD_SERIAL:
					builder->add(builder, part, va_arg(args, chunk_t));
					continue;
				case BUILD_X509_FLAG:
					builder->add(builder, part, va_arg(args, x509_flag_t));
					continue;
				case BUILD_KEY_SIZE:
					builder->add(builder, part, va_arg(args, u_int));
					continue;
				case BUILD_NOT_BEFORE_TIME:
				case BUILD_NOT_AFTER_TIME:
					builder->add(builder, part, va_arg(args, time_t));
					continue;
				case BUILD_BLOB_ASN1_PEM:
				case BUILD_FROM_FILE:
				case BUILD_AGENT_SOCKET:
				case BUILD_SIGNING_KEY:
				case BUILD_PUBLIC_KEY:
				case BUILD_SUBJECT:
				case BUILD_SUBJECT_ALTNAME:
				case BUILD_ISSUER:
				case BUILD_ISSUER_ALTNAME:
				case BUILD_SIGNING_CERT:
				case BUILD_CA_CERT:
				case BUILD_CERT:
				case BUILD_IETF_GROUP_ATTR:
				case BUILD_SMARTCARD_KEYID:
				case BUILD_SMARTCARD_PIN:
					builder->add(builder, part, va_arg(args, void*));
					continue;
				/* no default to get a compiler warning */
			}
			break;
		}
		va_end(args);
		
		construct = builder->build(builder);
		if (construct)
		{
			break;
		}
	}
	enumerator->destroy(enumerator);
	if (!construct)
	{
		DBG1("failed to create a builder for credential type %N,"
			 " subtype (%d)", credential_type_names, type, subtype);
	}
	return construct;
}

/**
 * Implementation of credential_factory_t.destroy
 */
static void destroy(private_credential_factory_t *this)
{
	this->constructors->destroy_function(this->constructors, free);
	this->lock->destroy(this->lock);
	free(this);
}

/*
 * see header file
 */
credential_factory_t *credential_factory_create()
{
	private_credential_factory_t *this = malloc_thing(private_credential_factory_t);

	this->public.create = (void*(*)(credential_factory_t*, credential_type_t type, int subtype, ...))create;
	this->public.create_builder_enumerator = (enumerator_t*(*)(credential_factory_t*, credential_type_t type, int subtype))create_builder_enumerator;
	this->public.add_builder = (void(*)(credential_factory_t*,credential_type_t type, int subtype, builder_constructor_t constructor))add_builder;
	this->public.remove_builder = (void(*)(credential_factory_t*,builder_constructor_t constructor))remove_builder;
	this->public.destroy = (void(*)(credential_factory_t*))destroy;
	
	this->constructors = linked_list_create();
	
	this->lock = rwlock_create(RWLOCK_DEFAULT);
	
	return &this->public;
}