0f3d578efc
Remove the GPL notification text from the files that were initially contributed by myself. Signed-hostap: Jouni Malinen <j@w1.fi>
85 lines
1.7 KiB
C
85 lines
1.7 KiB
C
/*
|
|
* EAP-PEAP common routines
|
|
* Copyright (c) 2008-2011, Jouni Malinen <j@w1.fi>
|
|
*
|
|
* This software may be distributed under the terms of the BSD license.
|
|
* See README for more details.
|
|
*/
|
|
|
|
#include "includes.h"
|
|
|
|
#include "common.h"
|
|
#include "crypto/sha1.h"
|
|
#include "eap_peap_common.h"
|
|
|
|
int peap_prfplus(int version, const u8 *key, size_t key_len,
|
|
const char *label, const u8 *seed, size_t seed_len,
|
|
u8 *buf, size_t buf_len)
|
|
{
|
|
unsigned char counter = 0;
|
|
size_t pos, plen;
|
|
u8 hash[SHA1_MAC_LEN];
|
|
size_t label_len = os_strlen(label);
|
|
u8 extra[2];
|
|
const unsigned char *addr[5];
|
|
size_t len[5];
|
|
|
|
addr[0] = hash;
|
|
len[0] = 0;
|
|
addr[1] = (unsigned char *) label;
|
|
len[1] = label_len;
|
|
addr[2] = seed;
|
|
len[2] = seed_len;
|
|
|
|
if (version == 0) {
|
|
/*
|
|
* PRF+(K, S, LEN) = T1 | T2 | ... | Tn
|
|
* T1 = HMAC-SHA1(K, S | 0x01 | 0x00 | 0x00)
|
|
* T2 = HMAC-SHA1(K, T1 | S | 0x02 | 0x00 | 0x00)
|
|
* ...
|
|
* Tn = HMAC-SHA1(K, Tn-1 | S | n | 0x00 | 0x00)
|
|
*/
|
|
|
|
extra[0] = 0;
|
|
extra[1] = 0;
|
|
|
|
addr[3] = &counter;
|
|
len[3] = 1;
|
|
addr[4] = extra;
|
|
len[4] = 2;
|
|
} else {
|
|
/*
|
|
* PRF (K,S,LEN) = T1 | T2 | T3 | T4 | ... where:
|
|
* T1 = HMAC-SHA1(K, S | LEN | 0x01)
|
|
* T2 = HMAC-SHA1 (K, T1 | S | LEN | 0x02)
|
|
* T3 = HMAC-SHA1 (K, T2 | S | LEN | 0x03)
|
|
* T4 = HMAC-SHA1 (K, T3 | S | LEN | 0x04)
|
|
* ...
|
|
*/
|
|
|
|
extra[0] = buf_len & 0xff;
|
|
|
|
addr[3] = extra;
|
|
len[3] = 1;
|
|
addr[4] = &counter;
|
|
len[4] = 1;
|
|
}
|
|
|
|
pos = 0;
|
|
while (pos < buf_len) {
|
|
counter++;
|
|
plen = buf_len - pos;
|
|
if (hmac_sha1_vector(key, key_len, 5, addr, len, hash) < 0)
|
|
return -1;
|
|
if (plen >= SHA1_MAC_LEN) {
|
|
os_memcpy(&buf[pos], hash, SHA1_MAC_LEN);
|
|
pos += SHA1_MAC_LEN;
|
|
} else {
|
|
os_memcpy(&buf[pos], hash, plen);
|
|
break;
|
|
}
|
|
len[0] = SHA1_MAC_LEN;
|
|
}
|
|
|
|
return 0;
|
|
}
|