crypto_nss.c revision 8d520ff1dc2da35cdca849e982051b86468016d8 
1/*
2 * Crypto wrapper functions for NSS
3 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15#include "includes.h"
16#include <nspr/prtypes.h>
17#include <nspr/plarenas.h>
18#include <nspr/plhash.h>
19#include <nspr/prtime.h>
20#include <nspr/prinrval.h>
21#include <nspr/prclist.h>
22#include <nspr/prlock.h>
23#include <nss/sechash.h>
24#include <nss/pk11pub.h>
25
26#include "common.h"
27#include "crypto.h"
28
29
30static int nss_hash(HASH_HashType type, unsigned int max_res_len,
31		    size_t num_elem, const u8 *addr[], const size_t *len,
32		    u8 *mac)
33{
34	HASHContext *ctx;
35	size_t i;
36	unsigned int reslen;
37
38	ctx = HASH_Create(type);
39	if (ctx == NULL)
40		return -1;
41
42	HASH_Begin(ctx);
43	for (i = 0; i < num_elem; i++)
44		HASH_Update(ctx, addr[i], len[i]);
45	HASH_End(ctx, mac, &reslen, max_res_len);
46	HASH_Destroy(ctx);
47
48	return 0;
49}
50
51
52void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
53{
54	PK11Context *ctx = NULL;
55	PK11SlotInfo *slot;
56	SECItem *param = NULL;
57	PK11SymKey *symkey = NULL;
58	SECItem item;
59	int olen;
60	u8 pkey[8], next, tmp;
61	int i;
62
63	/* Add parity bits to the key */
64	next = 0;
65	for (i = 0; i < 7; i++) {
66		tmp = key[i];
67		pkey[i] = (tmp >> i) | next | 1;
68		next = tmp << (7 - i);
69	}
70	pkey[i] = next | 1;
71
72	slot = PK11_GetBestSlot(CKM_DES_ECB, NULL);
73	if (slot == NULL) {
74		wpa_printf(MSG_ERROR, "NSS: PK11_GetBestSlot failed");
75		goto out;
76	}
77
78	item.type = siBuffer;
79	item.data = pkey;
80	item.len = 8;
81	symkey = PK11_ImportSymKey(slot, CKM_DES_ECB, PK11_OriginDerive,
82				   CKA_ENCRYPT, &item, NULL);
83	if (symkey == NULL) {
84		wpa_printf(MSG_ERROR, "NSS: PK11_ImportSymKey failed");
85		goto out;
86	}
87
88	param = PK11_GenerateNewParam(CKM_DES_ECB, symkey);
89	if (param == NULL) {
90		wpa_printf(MSG_ERROR, "NSS: PK11_GenerateNewParam failed");
91		goto out;
92	}
93
94	ctx = PK11_CreateContextBySymKey(CKM_DES_ECB, CKA_ENCRYPT,
95					 symkey, param);
96	if (ctx == NULL) {
97		wpa_printf(MSG_ERROR, "NSS: PK11_CreateContextBySymKey("
98			   "CKM_DES_ECB) failed");
99		goto out;
100	}
101
102	if (PK11_CipherOp(ctx, cypher, &olen, 8, (void *) clear, 8) !=
103	    SECSuccess) {
104		wpa_printf(MSG_ERROR, "NSS: PK11_CipherOp failed");
105		goto out;
106	}
107
108out:
109	if (ctx)
110		PK11_DestroyContext(ctx, PR_TRUE);
111	if (symkey)
112		PK11_FreeSymKey(symkey);
113	if (param)
114		SECITEM_FreeItem(param, PR_TRUE);
115}
116
117
118int rc4_skip(const u8 *key, size_t keylen, size_t skip,
119	     u8 *data, size_t data_len)
120{
121	return -1;
122}
123
124
125int md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
126{
127	return nss_hash(HASH_AlgMD5, 16, num_elem, addr, len, mac);
128}
129
130
131int sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
132{
133	return nss_hash(HASH_AlgSHA1, 20, num_elem, addr, len, mac);
134}
135
136
137int sha256_vector(size_t num_elem, const u8 *addr[], const size_t *len,
138		  u8 *mac)
139{
140	return nss_hash(HASH_AlgSHA256, 32, num_elem, addr, len, mac);
141}
142
143
144void * aes_encrypt_init(const u8 *key, size_t len)
145{
146	return NULL;
147}
148
149
150void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
151{
152}
153
154
155void aes_encrypt_deinit(void *ctx)
156{
157}
158
159
160void * aes_decrypt_init(const u8 *key, size_t len)
161{
162	return NULL;
163}
164
165
166void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
167{
168}
169
170
171void aes_decrypt_deinit(void *ctx)
172{
173}
174
175
176int crypto_mod_exp(const u8 *base, size_t base_len,
177		   const u8 *power, size_t power_len,
178		   const u8 *modulus, size_t modulus_len,
179		   u8 *result, size_t *result_len)
180{
181	return -1;
182}
183
184
185struct crypto_cipher {
186};
187
188
189struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg,
190					  const u8 *iv, const u8 *key,
191					  size_t key_len)
192{
193	return NULL;
194}
195
196
197int crypto_cipher_encrypt(struct crypto_cipher *ctx, const u8 *plain,
198			  u8 *crypt, size_t len)
199{
200	return -1;
201}
202
203
204int crypto_cipher_decrypt(struct crypto_cipher *ctx, const u8 *crypt,
205			  u8 *plain, size_t len)
206{
207	return -1;
208}
209
210
211void crypto_cipher_deinit(struct crypto_cipher *ctx)
212{
213}
214