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staging: rtl8723bs: replace private CRC-32 routines with in-kernel ones
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>
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1 changed files with 7 additions and 59 deletions
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@ -4,7 +4,7 @@
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* Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
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*
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******************************************************************************/
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#include <linux/crc32poly.h>
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#include <linux/crc32.h>
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#include <drv_types.h>
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#include <rtw_debug.h>
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#include <crypto/aes.h>
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@ -31,58 +31,6 @@ const char *security_type_str(u8 value)
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/* WEP related ===== */
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static signed int bcrc32initialized;
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static u32 crc32_table[256];
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static u8 crc32_reverseBit(u8 data)
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{
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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));
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}
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static void crc32_init(void)
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{
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if (bcrc32initialized == 1)
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return;
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else {
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signed int i, j;
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u32 c;
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u8 *p = (u8 *)&c, *p1;
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u8 k;
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c = 0x12340000;
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for (i = 0; i < 256; ++i) {
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k = crc32_reverseBit((u8)i);
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for (c = ((u32)k) << 24, j = 8; j > 0; --j)
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c = c & 0x80000000 ? (c << 1) ^ CRC32_POLY_BE : (c << 1);
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p1 = (u8 *)&crc32_table[i];
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p1[0] = crc32_reverseBit(p[3]);
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p1[1] = crc32_reverseBit(p[2]);
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p1[2] = crc32_reverseBit(p[1]);
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p1[3] = crc32_reverseBit(p[0]);
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}
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bcrc32initialized = 1;
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}
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}
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static __le32 getcrc32(u8 *buf, signed int len)
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{
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u8 *p;
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u32 crc;
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if (bcrc32initialized == 0)
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crc32_init();
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crc = 0xffffffff; /* preload shift register, per CRC-32 spec */
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for (p = buf; len > 0; ++p, --len)
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crc = crc32_table[(crc ^ *p) & 0xff] ^ (crc >> 8);
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return cpu_to_le32(~crc); /* transmit complement, per CRC-32 spec */
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}
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/*
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Need to consider the fragment situation
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*/
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@ -122,7 +70,7 @@ void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe)
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length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
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*((__le32 *)crc) = getcrc32(payload, length);
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*((__le32 *)crc) = ~crc32_le(~0, payload, length);
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arc4_setkey(&mycontext, wepkey, 3 + keylength);
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arc4_crypt(&mycontext, payload, payload, length);
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@ -130,7 +78,7 @@ void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe)
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} else {
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length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
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*((__le32 *)crc) = getcrc32(payload, length);
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*((__le32 *)crc) = ~crc32_le(~0, payload, length);
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arc4_setkey(&mycontext, wepkey, 3 + keylength);
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arc4_crypt(&mycontext, payload, payload, length);
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arc4_crypt(&mycontext, payload + length, crc, 4);
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@ -174,7 +122,7 @@ void rtw_wep_decrypt(struct adapter *padapter, u8 *precvframe)
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arc4_crypt(&mycontext, payload, payload, length);
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/* calculate icv and compare the icv */
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*((u32 *)crc) = le32_to_cpu(getcrc32(payload, length-4));
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*((u32 *)crc) = le32_to_cpu(~crc32_le(~0, payload, length - 4));
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}
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}
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@ -559,7 +507,7 @@ u32 rtw_tkip_encrypt(struct adapter *padapter, u8 *pxmitframe)
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if ((curfragnum+1) == pattrib->nr_frags) { /* 4 the last fragment */
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length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
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*((__le32 *)crc) = getcrc32(payload, length);/* modified by Amy*/
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*((__le32 *)crc) = ~crc32_le(~0, payload, length);/* modified by Amy*/
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arc4_setkey(&mycontext, rc4key, 16);
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arc4_crypt(&mycontext, payload, payload, length);
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@ -567,7 +515,7 @@ u32 rtw_tkip_encrypt(struct adapter *padapter, u8 *pxmitframe)
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} else {
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length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
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*((__le32 *)crc) = getcrc32(payload, length);/* modified by Amy*/
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*((__le32 *)crc) = ~crc32_le(~0, payload, length);/* modified by Amy*/
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arc4_setkey(&mycontext, rc4key, 16);
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arc4_crypt(&mycontext, payload, payload, length);
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arc4_crypt(&mycontext, payload + length, crc, 4);
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@ -670,7 +618,7 @@ u32 rtw_tkip_decrypt(struct adapter *padapter, u8 *precvframe)
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arc4_setkey(&mycontext, rc4key, 16);
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arc4_crypt(&mycontext, payload, payload, length);
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*((u32 *)crc) = le32_to_cpu(getcrc32(payload, length-4));
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*((u32 *)crc) = le32_to_cpu(~crc32_le(~0, payload, length - 4));
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if (crc[3] != payload[length - 1] || crc[2] != payload[length - 2] ||
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crc[1] != payload[length - 3] || crc[0] != payload[length - 4])
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