Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright 2002-2004, Instant802 Networks, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright 2005, Devicescape Software, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2016 Intel Deutschland GmbH
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <net/mac80211.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include "driver-ops.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "key.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "tkip.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include "wep.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #define PHASE1_LOOP_COUNT 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  * 2-byte by 2-byte subset of the full AES S-box table; second part of this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * table is identical to first part but byte-swapped
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) static const u16 tkip_sbox[256] =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	0xC6A5, 0xF884, 0xEE99, 0xF68D, 0xFF0D, 0xD6BD, 0xDEB1, 0x9154,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	0x6050, 0x0203, 0xCEA9, 0x567D, 0xE719, 0xB562, 0x4DE6, 0xEC9A,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	0x8F45, 0x1F9D, 0x8940, 0xFA87, 0xEF15, 0xB2EB, 0x8EC9, 0xFB0B,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	0x41EC, 0xB367, 0x5FFD, 0x45EA, 0x23BF, 0x53F7, 0xE496, 0x9B5B,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	0x75C2, 0xE11C, 0x3DAE, 0x4C6A, 0x6C5A, 0x7E41, 0xF502, 0x834F,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	0x685C, 0x51F4, 0xD134, 0xF908, 0xE293, 0xAB73, 0x6253, 0x2A3F,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	0x080C, 0x9552, 0x4665, 0x9D5E, 0x3028, 0x37A1, 0x0A0F, 0x2FB5,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	0x0E09, 0x2436, 0x1B9B, 0xDF3D, 0xCD26, 0x4E69, 0x7FCD, 0xEA9F,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	0x121B, 0x1D9E, 0x5874, 0x342E, 0x362D, 0xDCB2, 0xB4EE, 0x5BFB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	0xA4F6, 0x764D, 0xB761, 0x7DCE, 0x527B, 0xDD3E, 0x5E71, 0x1397,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	0xA6F5, 0xB968, 0x0000, 0xC12C, 0x4060, 0xE31F, 0x79C8, 0xB6ED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	0xD4BE, 0x8D46, 0x67D9, 0x724B, 0x94DE, 0x98D4, 0xB0E8, 0x854A,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	0xBB6B, 0xC52A, 0x4FE5, 0xED16, 0x86C5, 0x9AD7, 0x6655, 0x1194,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	0x8ACF, 0xE910, 0x0406, 0xFE81, 0xA0F0, 0x7844, 0x25BA, 0x4BE3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	0xA2F3, 0x5DFE, 0x80C0, 0x058A, 0x3FAD, 0x21BC, 0x7048, 0xF104,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	0x63DF, 0x77C1, 0xAF75, 0x4263, 0x2030, 0xE51A, 0xFD0E, 0xBF6D,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	0x814C, 0x1814, 0x2635, 0xC32F, 0xBEE1, 0x35A2, 0x88CC, 0x2E39,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	0x9357, 0x55F2, 0xFC82, 0x7A47, 0xC8AC, 0xBAE7, 0x322B, 0xE695,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	0xC0A0, 0x1998, 0x9ED1, 0xA37F, 0x4466, 0x547E, 0x3BAB, 0x0B83,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	0x8CCA, 0xC729, 0x6BD3, 0x283C, 0xA779, 0xBCE2, 0x161D, 0xAD76,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	0xDB3B, 0x6456, 0x744E, 0x141E, 0x92DB, 0x0C0A, 0x486C, 0xB8E4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	0x9F5D, 0xBD6E, 0x43EF, 0xC4A6, 0x39A8, 0x31A4, 0xD337, 0xF28B,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	0xD532, 0x8B43, 0x6E59, 0xDAB7, 0x018C, 0xB164, 0x9CD2, 0x49E0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	0xD8B4, 0xACFA, 0xF307, 0xCF25, 0xCAAF, 0xF48E, 0x47E9, 0x1018,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	0x6FD5, 0xF088, 0x4A6F, 0x5C72, 0x3824, 0x57F1, 0x73C7, 0x9751,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	0xCB23, 0xA17C, 0xE89C, 0x3E21, 0x96DD, 0x61DC, 0x0D86, 0x0F85,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	0xE090, 0x7C42, 0x71C4, 0xCCAA, 0x90D8, 0x0605, 0xF701, 0x1C12,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	0xC2A3, 0x6A5F, 0xAEF9, 0x69D0, 0x1791, 0x9958, 0x3A27, 0x27B9,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	0xD938, 0xEB13, 0x2BB3, 0x2233, 0xD2BB, 0xA970, 0x0789, 0x33A7,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	0x2DB6, 0x3C22, 0x1592, 0xC920, 0x8749, 0xAAFF, 0x5078, 0xA57A,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	0x038F, 0x59F8, 0x0980, 0x1A17, 0x65DA, 0xD731, 0x84C6, 0xD0B8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	0x82C3, 0x29B0, 0x5A77, 0x1E11, 0x7BCB, 0xA8FC, 0x6DD6, 0x2C3A,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) static u16 tkipS(u16 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	return tkip_sbox[val & 0xff] ^ swab16(tkip_sbox[val >> 8]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) static u8 *write_tkip_iv(u8 *pos, u16 iv16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	*pos++ = iv16 >> 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	*pos++ = ((iv16 >> 8) | 0x20) & 0x7f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	*pos++ = iv16 & 0xFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	return pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76)  * P1K := Phase1(TA, TK, TSC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77)  * TA = transmitter address (48 bits)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78)  * TK = dot11DefaultKeyValue or dot11KeyMappingValue (128 bits)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79)  * TSC = TKIP sequence counter (48 bits, only 32 msb bits used)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80)  * P1K: 80 bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) static void tkip_mixing_phase1(const u8 *tk, struct tkip_ctx *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 			       const u8 *ta, u32 tsc_IV32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	int i, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	u16 *p1k = ctx->p1k;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	p1k[0] = tsc_IV32 & 0xFFFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	p1k[1] = tsc_IV32 >> 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	p1k[2] = get_unaligned_le16(ta + 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	p1k[3] = get_unaligned_le16(ta + 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	p1k[4] = get_unaligned_le16(ta + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	for (i = 0; i < PHASE1_LOOP_COUNT; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		j = 2 * (i & 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		p1k[0] += tkipS(p1k[4] ^ get_unaligned_le16(tk + 0 + j));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		p1k[1] += tkipS(p1k[0] ^ get_unaligned_le16(tk + 4 + j));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		p1k[2] += tkipS(p1k[1] ^ get_unaligned_le16(tk + 8 + j));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		p1k[3] += tkipS(p1k[2] ^ get_unaligned_le16(tk + 12 + j));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		p1k[4] += tkipS(p1k[3] ^ get_unaligned_le16(tk + 0 + j)) + i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	ctx->state = TKIP_STATE_PHASE1_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	ctx->p1k_iv32 = tsc_IV32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static void tkip_mixing_phase2(const u8 *tk, struct tkip_ctx *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 			       u16 tsc_IV16, u8 *rc4key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	u16 ppk[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	const u16 *p1k = ctx->p1k;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	ppk[0] = p1k[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	ppk[1] = p1k[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	ppk[2] = p1k[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	ppk[3] = p1k[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	ppk[4] = p1k[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	ppk[5] = p1k[4] + tsc_IV16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	ppk[0] += tkipS(ppk[5] ^ get_unaligned_le16(tk + 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	ppk[1] += tkipS(ppk[0] ^ get_unaligned_le16(tk + 2));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	ppk[2] += tkipS(ppk[1] ^ get_unaligned_le16(tk + 4));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	ppk[3] += tkipS(ppk[2] ^ get_unaligned_le16(tk + 6));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	ppk[4] += tkipS(ppk[3] ^ get_unaligned_le16(tk + 8));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	ppk[5] += tkipS(ppk[4] ^ get_unaligned_le16(tk + 10));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	ppk[0] += ror16(ppk[5] ^ get_unaligned_le16(tk + 12), 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	ppk[1] += ror16(ppk[0] ^ get_unaligned_le16(tk + 14), 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	ppk[2] += ror16(ppk[1], 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	ppk[3] += ror16(ppk[2], 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	ppk[4] += ror16(ppk[3], 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	ppk[5] += ror16(ppk[4], 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	rc4key = write_tkip_iv(rc4key, tsc_IV16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	*rc4key++ = ((ppk[5] ^ get_unaligned_le16(tk)) >> 1) & 0xFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	for (i = 0; i < 6; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		put_unaligned_le16(ppk[i], rc4key + 2 * i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) /* Add TKIP IV and Ext. IV at @pos. @iv0, @iv1, and @iv2 are the first octets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)  * of the IV. Returns pointer to the octet following IVs (i.e., beginning of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)  * the packet payload). */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) u8 *ieee80211_tkip_add_iv(u8 *pos, struct ieee80211_key_conf *keyconf, u64 pn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	pos = write_tkip_iv(pos, TKIP_PN_TO_IV16(pn));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	*pos++ = (keyconf->keyidx << 6) | (1 << 5) /* Ext IV */;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	put_unaligned_le32(TKIP_PN_TO_IV32(pn), pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	return pos + 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) EXPORT_SYMBOL_GPL(ieee80211_tkip_add_iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static void ieee80211_compute_tkip_p1k(struct ieee80211_key *key, u32 iv32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	struct ieee80211_sub_if_data *sdata = key->sdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	struct tkip_ctx *ctx = &key->u.tkip.tx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	const u8 *tk = &key->conf.key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	lockdep_assert_held(&key->u.tkip.txlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	 * Update the P1K when the IV32 is different from the value it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	 * had when we last computed it (or when not initialised yet).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	 * This might flip-flop back and forth if packets are processed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	 * out-of-order due to the different ACs, but then we have to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	 * just compute the P1K more often.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	if (ctx->p1k_iv32 != iv32 || ctx->state == TKIP_STATE_NOT_INIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		tkip_mixing_phase1(tk, ctx, sdata->vif.addr, iv32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 			       u32 iv32, u16 *p1k)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	struct ieee80211_key *key = (struct ieee80211_key *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 			container_of(keyconf, struct ieee80211_key, conf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	struct tkip_ctx *ctx = &key->u.tkip.tx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	spin_lock_bh(&key->u.tkip.txlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	ieee80211_compute_tkip_p1k(key, iv32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	memcpy(p1k, ctx->p1k, sizeof(ctx->p1k));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	spin_unlock_bh(&key->u.tkip.txlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) EXPORT_SYMBOL(ieee80211_get_tkip_p1k_iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 			       const u8 *ta, u32 iv32, u16 *p1k)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	const u8 *tk = &keyconf->key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	struct tkip_ctx ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	tkip_mixing_phase1(tk, &ctx, ta, iv32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	memcpy(p1k, ctx.p1k, sizeof(ctx.p1k));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) EXPORT_SYMBOL(ieee80211_get_tkip_rx_p1k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 			    struct sk_buff *skb, u8 *p2k)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	struct ieee80211_key *key = (struct ieee80211_key *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 			container_of(keyconf, struct ieee80211_key, conf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	const u8 *tk = &key->conf.key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	struct tkip_ctx *ctx = &key->u.tkip.tx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	u32 iv32 = get_unaligned_le32(&data[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	u16 iv16 = data[2] | (data[0] << 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	spin_lock(&key->u.tkip.txlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	ieee80211_compute_tkip_p1k(key, iv32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	tkip_mixing_phase2(tk, ctx, iv16, p2k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	spin_unlock(&key->u.tkip.txlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) EXPORT_SYMBOL(ieee80211_get_tkip_p2k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)  * Encrypt packet payload with TKIP using @key. @pos is a pointer to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)  * beginning of the buffer containing payload. This payload must include
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)  * the IV/Ext.IV and space for (taildroom) four octets for ICV.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)  * @payload_len is the length of payload (_not_ including IV/ICV length).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)  * @ta is the transmitter addresses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) int ieee80211_tkip_encrypt_data(struct arc4_ctx *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 				struct ieee80211_key *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 				struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 				u8 *payload, size_t payload_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	u8 rc4key[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	ieee80211_get_tkip_p2k(&key->conf, skb, rc4key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	return ieee80211_wep_encrypt_data(ctx, rc4key, 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 					  payload, payload_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) /* Decrypt packet payload with TKIP using @key. @pos is a pointer to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)  * beginning of the buffer containing IEEE 802.11 header payload, i.e.,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)  * including IV, Ext. IV, real data, Michael MIC, ICV. @payload_len is the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)  * length of payload, including IV, Ext. IV, MIC, ICV.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) int ieee80211_tkip_decrypt_data(struct arc4_ctx *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 				struct ieee80211_key *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 				u8 *payload, size_t payload_len, u8 *ta,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 				u8 *ra, int only_iv, int queue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 				u32 *out_iv32, u16 *out_iv16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	u32 iv32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	u32 iv16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	u8 rc4key[16], keyid, *pos = payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	const u8 *tk = &key->conf.key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	struct tkip_ctx_rx *rx_ctx = &key->u.tkip.rx[queue];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	if (payload_len < 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	iv16 = (pos[0] << 8) | pos[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	keyid = pos[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	iv32 = get_unaligned_le32(pos + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	pos += 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	if (!(keyid & (1 << 5)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		return TKIP_DECRYPT_NO_EXT_IV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	if ((keyid >> 6) != key->conf.keyidx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		return TKIP_DECRYPT_INVALID_KEYIDX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	/* Reject replays if the received TSC is smaller than or equal to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	 * last received value in a valid message, but with an exception for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	 * the case where a new key has been set and no valid frame using that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	 * key has yet received and the local RSC was initialized to 0. This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	 * exception allows the very first frame sent by the transmitter to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	 * accepted even if that transmitter were to use TSC 0 (IEEE 802.11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	 * described TSC to be initialized to 1 whenever a new key is taken into
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	 * use).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	if (iv32 < rx_ctx->iv32 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	    (iv32 == rx_ctx->iv32 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	     (iv16 < rx_ctx->iv16 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	      (iv16 == rx_ctx->iv16 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	       (rx_ctx->iv32 || rx_ctx->iv16 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		rx_ctx->ctx.state != TKIP_STATE_NOT_INIT)))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		return TKIP_DECRYPT_REPLAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	if (only_iv) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		res = TKIP_DECRYPT_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		rx_ctx->ctx.state = TKIP_STATE_PHASE1_HW_UPLOADED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	if (rx_ctx->ctx.state == TKIP_STATE_NOT_INIT ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	    rx_ctx->iv32 != iv32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		/* IV16 wrapped around - perform TKIP phase 1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		tkip_mixing_phase1(tk, &rx_ctx->ctx, ta, iv32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	if (key->local->ops->update_tkip_key &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	    key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	    rx_ctx->ctx.state != TKIP_STATE_PHASE1_HW_UPLOADED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		struct ieee80211_sub_if_data *sdata = key->sdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 			sdata = container_of(key->sdata->bss,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 					struct ieee80211_sub_if_data, u.ap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		drv_update_tkip_key(key->local, sdata, &key->conf, key->sta,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 				iv32, rx_ctx->ctx.p1k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		rx_ctx->ctx.state = TKIP_STATE_PHASE1_HW_UPLOADED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	tkip_mixing_phase2(tk, &rx_ctx->ctx, iv16, rc4key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	res = ieee80211_wep_decrypt_data(ctx, rc4key, 16, pos, payload_len - 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)  done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	if (res == TKIP_DECRYPT_OK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 		 * Record previously received IV, will be copied into the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 		 * key information after MIC verification. It is possible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 		 * that we don't catch replays of fragments but that's ok
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 		 * because the Michael MIC verication will then fail.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		*out_iv32 = iv32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 		*out_iv16 = iv16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }