![Jouni Malinen](/assets/img/avatar_default.png)
This brings in the first step in adding support for using NSS (Mozilla Network Security Services) as the crypto and TLS library with wpa_supplicant. This version is able to run through EAP-PEAP and EAP-TTLS authentication, but does not yet implement any certificate/private key configuration. In addition, this does not implement proper key fetching functions either, so the end result is not really of much use in real world yet.
213 lines
4 KiB
C
213 lines
4 KiB
C
/*
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* Crypto wrapper functions for NSS
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* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include "includes.h"
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#include <nspr/prtypes.h>
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#include <nspr/plarenas.h>
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#include <nspr/plhash.h>
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#include <nspr/prtime.h>
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#include <nspr/prinrval.h>
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#include <nspr/prclist.h>
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#include <nspr/prlock.h>
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#include <nss/sechash.h>
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#include <nss/pk11pub.h>
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#include "common.h"
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#include "crypto.h"
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static int nss_hash(HASH_HashType type, unsigned int max_res_len,
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size_t num_elem, const u8 *addr[], const size_t *len,
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u8 *mac)
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{
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HASHContext *ctx;
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size_t i;
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unsigned int reslen;
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ctx = HASH_Create(type);
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if (ctx == NULL)
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return -1;
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HASH_Begin(ctx);
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for (i = 0; i < num_elem; i++)
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HASH_Update(ctx, addr[i], len[i]);
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HASH_End(ctx, mac, &reslen, max_res_len);
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HASH_Destroy(ctx);
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return 0;
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}
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void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
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{
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PK11Context *ctx = NULL;
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PK11SlotInfo *slot;
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SECItem *param = NULL;
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PK11SymKey *symkey = NULL;
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SECItem item;
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int olen;
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u8 pkey[8], next, tmp;
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int i;
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/* Add parity bits to the key */
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next = 0;
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for (i = 0; i < 7; i++) {
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tmp = key[i];
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pkey[i] = (tmp >> i) | next | 1;
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next = tmp << (7 - i);
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}
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pkey[i] = next | 1;
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slot = PK11_GetBestSlot(CKM_DES_ECB, NULL);
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if (slot == NULL) {
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wpa_printf(MSG_ERROR, "NSS: PK11_GetBestSlot failed");
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goto out;
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}
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item.type = siBuffer;
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item.data = pkey;
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item.len = 8;
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symkey = PK11_ImportSymKey(slot, CKM_DES_ECB, PK11_OriginDerive,
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CKA_ENCRYPT, &item, NULL);
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if (symkey == NULL) {
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wpa_printf(MSG_ERROR, "NSS: PK11_ImportSymKey failed");
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goto out;
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}
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param = PK11_GenerateNewParam(CKM_DES_ECB, symkey);
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if (param == NULL) {
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wpa_printf(MSG_ERROR, "NSS: PK11_GenerateNewParam failed");
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goto out;
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}
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ctx = PK11_CreateContextBySymKey(CKM_DES_ECB, CKA_ENCRYPT,
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symkey, param);
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if (ctx == NULL) {
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wpa_printf(MSG_ERROR, "NSS: PK11_CreateContextBySymKey("
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"CKM_DES_ECB) failed");
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goto out;
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}
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if (PK11_CipherOp(ctx, cypher, &olen, 8, (void *) clear, 8) !=
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SECSuccess) {
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wpa_printf(MSG_ERROR, "NSS: PK11_CipherOp failed");
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goto out;
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}
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out:
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if (ctx)
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PK11_DestroyContext(ctx, PR_TRUE);
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if (symkey)
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PK11_FreeSymKey(symkey);
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if (param)
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SECITEM_FreeItem(param, PR_TRUE);
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}
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int rc4_skip(const u8 *key, size_t keylen, size_t skip,
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u8 *data, size_t data_len)
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{
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return -1;
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}
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int md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
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{
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return nss_hash(HASH_AlgMD5, 16, num_elem, addr, len, mac);
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}
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int sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
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{
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return nss_hash(HASH_AlgSHA1, 20, num_elem, addr, len, mac);
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}
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int sha256_vector(size_t num_elem, const u8 *addr[], const size_t *len,
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u8 *mac)
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{
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return nss_hash(HASH_AlgSHA256, 32, num_elem, addr, len, mac);
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}
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void * aes_encrypt_init(const u8 *key, size_t len)
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{
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return NULL;
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}
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void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
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{
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}
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void aes_encrypt_deinit(void *ctx)
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{
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}
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void * aes_decrypt_init(const u8 *key, size_t len)
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{
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return NULL;
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}
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void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
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{
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}
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void aes_decrypt_deinit(void *ctx)
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{
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}
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int crypto_mod_exp(const u8 *base, size_t base_len,
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const u8 *power, size_t power_len,
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const u8 *modulus, size_t modulus_len,
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u8 *result, size_t *result_len)
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{
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return -1;
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}
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struct crypto_cipher {
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};
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struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg,
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const u8 *iv, const u8 *key,
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size_t key_len)
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{
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return NULL;
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}
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int crypto_cipher_encrypt(struct crypto_cipher *ctx, const u8 *plain,
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u8 *crypt, size_t len)
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{
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return -1;
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}
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int crypto_cipher_decrypt(struct crypto_cipher *ctx, const u8 *crypt,
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u8 *plain, size_t len)
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{
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return -1;
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}
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void crypto_cipher_deinit(struct crypto_cipher *ctx)
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{
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}
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