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staging: rtl8723bs: replace private CRC-32 routines with in-kernel ones

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replace private CRC-32 routines with in-kernel ones.

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/cdd9bc521b7119a9c2787b46109eb76f94bd295a.1620652505.git.fabioaiuto83@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Fabio Aiuto
2021-05-10 15:19:32 +02:00
committed by Greg Kroah-Hartman
parent f6d5d11846
commit b97fad10de
1 changed files with 7 additions and 59 deletions
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66
drivers/staging/rtl8723bs/core/rtw_security.c
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@@ -4,7 +4,7 @@
* Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
*
******************************************************************************/
#include <linux/crc32poly.h>
#include <linux/crc32.h>
#include <drv_types.h>
#include <rtw_debug.h>
#include <crypto/aes.h>
@@ -31,58 +31,6 @@ const char *security_type_str(u8 value)
/* WEP related ===== */
static signed int bcrc32initialized;
static u32 crc32_table[256];
static u8 crc32_reverseBit(u8 data)
{
return((u8)((data<<7)&0x80) | ((data<<5)&0x40) | ((data<<3)&0x20) | ((data<<1)&0x10) | ((data>>1)&0x08) | ((data>>3)&0x04) | ((data>>5)&0x02) | ((data>>7)&0x01));
}
static void crc32_init(void)
{
if (bcrc32initialized == 1)
return;
else {
signed int i, j;
u32 c;
u8 *p = (u8 *)&c, *p1;
u8 k;
c = 0x12340000;
for (i = 0; i < 256; ++i) {
k = crc32_reverseBit((u8)i);
for (c = ((u32)k) << 24, j = 8; j > 0; --j)
c = c & 0x80000000 ? (c << 1) ^ CRC32_POLY_BE : (c << 1);
p1 = (u8 *)&crc32_table[i];
p1[0] = crc32_reverseBit(p[3]);
p1[1] = crc32_reverseBit(p[2]);
p1[2] = crc32_reverseBit(p[1]);
p1[3] = crc32_reverseBit(p[0]);
}
bcrc32initialized = 1;
}
}
static __le32 getcrc32(u8 *buf, signed int len)
{
u8 *p;
u32 crc;
if (bcrc32initialized == 0)
crc32_init();
crc = 0xffffffff; /* preload shift register, per CRC-32 spec */
for (p = buf; len > 0; ++p, --len)
crc = crc32_table[(crc ^ *p) & 0xff] ^ (crc >> 8);
return cpu_to_le32(~crc); /* transmit complement, per CRC-32 spec */
}
/*
Need to consider the fragment situation
*/
@@ -122,7 +70,7 @@ void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe)
length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
*((__le32 *)crc) = getcrc32(payload, length);
*((__le32 *)crc) = ~crc32_le(~0, payload, length);
arc4_setkey(&mycontext, wepkey, 3 + keylength);
arc4_crypt(&mycontext, payload, payload, length);
@@ -130,7 +78,7 @@ void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe)
} else {
length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
*((__le32 *)crc) = getcrc32(payload, length);
*((__le32 *)crc) = ~crc32_le(~0, payload, length);
arc4_setkey(&mycontext, wepkey, 3 + keylength);
arc4_crypt(&mycontext, payload, payload, length);
arc4_crypt(&mycontext, payload + length, crc, 4);
@@ -174,7 +122,7 @@ void rtw_wep_decrypt(struct adapter *padapter, u8 *precvframe)
arc4_crypt(&mycontext, payload, payload, length);
/* calculate icv and compare the icv */
*((u32 *)crc) = le32_to_cpu(getcrc32(payload, length-4));
*((u32 *)crc) = le32_to_cpu(~crc32_le(~0, payload, length - 4));
}
}
@@ -559,7 +507,7 @@ u32 rtw_tkip_encrypt(struct adapter *padapter, u8 *pxmitframe)
if ((curfragnum+1) == pattrib->nr_frags) { /* 4 the last fragment */
length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
*((__le32 *)crc) = getcrc32(payload, length);/* modified by Amy*/
*((__le32 *)crc) = ~crc32_le(~0, payload, length);/* modified by Amy*/
arc4_setkey(&mycontext, rc4key, 16);
arc4_crypt(&mycontext, payload, payload, length);
@@ -567,7 +515,7 @@ u32 rtw_tkip_encrypt(struct adapter *padapter, u8 *pxmitframe)
} else {
length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
*((__le32 *)crc) = getcrc32(payload, length);/* modified by Amy*/
*((__le32 *)crc) = ~crc32_le(~0, payload, length);/* modified by Amy*/
arc4_setkey(&mycontext, rc4key, 16);
arc4_crypt(&mycontext, payload, payload, length);
arc4_crypt(&mycontext, payload + length, crc, 4);
@@ -670,7 +618,7 @@ u32 rtw_tkip_decrypt(struct adapter *padapter, u8 *precvframe)
arc4_setkey(&mycontext, rc4key, 16);
arc4_crypt(&mycontext, payload, payload, length);
*((u32 *)crc) = le32_to_cpu(getcrc32(payload, length-4));
*((u32 *)crc) = le32_to_cpu(~crc32_le(~0, payload, length - 4));
if (crc[3] != payload[length - 1] || crc[2] != payload[length - 2] ||
crc[1] != payload[length - 3] || crc[0] != payload[length - 4])