Use crc32_le() in-kernel API in place of the custom getcrc32(). Then
remove no more necessary functions and variables that were needed by
getcrc32().
Fabio M. De Francesco (2):
staging: r8188eu: Replace a custom function with crc32_le()
staging: r8188eu: Remove no more used functions and variables
drivers/staging/r8188eu/core/rtw_security.c | 111 ++++++--------------
1 file changed, 35 insertions(+), 76 deletions(-)
--
2.32.0
Use crc32_le() in place of the custom getcrc32().
Signed-off-by: Fabio M. De Francesco <[email protected]>
---
drivers/staging/r8188eu/core/rtw_security.c | 74 ++++++++++-----------
1 file changed, 35 insertions(+), 39 deletions(-)
diff --git a/drivers/staging/r8188eu/core/rtw_security.c b/drivers/staging/r8188eu/core/rtw_security.c
index 5df970994e23..9625beea4b3c 100644
--- a/drivers/staging/r8188eu/core/rtw_security.c
+++ b/drivers/staging/r8188eu/core/rtw_security.c
@@ -111,29 +111,15 @@ static void crc32_init(void)
}
}
-static __le32 getcrc32(u8 *buf, 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
*/
void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe)
{ /* exclude ICV */
-
- unsigned char crc[4];
+ union {
+ __le32 f0;
+ u8 f1[4];
+ } crc;
struct arc4context mycontext;
int curfragnum, length;
@@ -167,17 +153,17 @@ void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe)
if ((curfragnum+1) == pattrib->nr_frags) { /* the last fragment */
length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
- *((__le32 *)crc) = getcrc32(payload, length);
+ crc.f0 = cpu_to_le32(~crc32_le(~0, payload, length));
arcfour_init(&mycontext, wepkey, 3+keylength);
arcfour_encrypt(&mycontext, payload, payload, length);
- arcfour_encrypt(&mycontext, payload+length, crc, 4);
+ arcfour_encrypt(&mycontext, payload+length, crc.f1, 4);
} else {
length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
- *((__le32 *)crc) = getcrc32(payload, length);
+ crc.f0 = cpu_to_le32(~crc32_le(~0, payload, length));
arcfour_init(&mycontext, wepkey, 3+keylength);
arcfour_encrypt(&mycontext, payload, payload, length);
- arcfour_encrypt(&mycontext, payload+length, crc, 4);
+ arcfour_encrypt(&mycontext, payload+length, crc.f1, 4);
pframe += pxmitpriv->frag_len;
pframe = (u8 *)RND4((size_t)(pframe));
@@ -190,7 +176,10 @@ void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe)
void rtw_wep_decrypt(struct adapter *padapter, u8 *precvframe)
{
/* exclude ICV */
- u8 crc[4];
+ union {
+ __le32 f0;
+ u8 f1[4];
+ } crc;
struct arc4context mycontext;
int length;
u32 keylength;
@@ -217,12 +206,12 @@ void rtw_wep_decrypt(struct adapter *padapter, u8 *precvframe)
arcfour_encrypt(&mycontext, payload, payload, length);
/* calculate icv and compare the icv */
- *((__le32 *)crc) = getcrc32(payload, length - 4);
+ crc.f0 = cpu_to_le32(~crc32_le(~0, payload, length));
- if (crc[3] != payload[length-1] ||
- crc[2] != payload[length-2] ||
- crc[1] != payload[length-3] ||
- crc[0] != payload[length-4]) {
+ if (crc.f1[3] != payload[length-1] ||
+ crc.f1[2] != payload[length-2] ||
+ crc.f1[1] != payload[length-3] ||
+ crc.f1[0] != payload[length-4]) {
RT_TRACE(_module_rtl871x_security_c_, _drv_err_,
("rtw_wep_decrypt:icv error crc (%4ph)!=payload (%4ph)\n",
&crc, &payload[length-4]));
@@ -574,7 +563,10 @@ u32 rtw_tkip_encrypt(struct adapter *padapter, u8 *pxmitframe)
u32 pnh;
u8 rc4key[16];
u8 ttkey[16];
- u8 crc[4];
+ union {
+ __le32 f0;
+ u8 f1[4];
+ } crc;
u8 hw_hdr_offset = 0;
struct arc4context mycontext;
int curfragnum, length;
@@ -624,17 +616,18 @@ u32 rtw_tkip_encrypt(struct adapter *padapter, u8 *pxmitframe)
RT_TRACE(_module_rtl871x_security_c_, _drv_info_,
("pattrib->iv_len=%x, pattrib->icv_len=%x\n",
pattrib->iv_len, pattrib->icv_len));
- *((__le32 *)crc) = getcrc32(payload, length);/* modified by Amy*/
+ crc.f0 = cpu_to_le32(~crc32_le(~0, payload, length));
arcfour_init(&mycontext, rc4key, 16);
arcfour_encrypt(&mycontext, payload, payload, length);
- arcfour_encrypt(&mycontext, payload+length, crc, 4);
+ arcfour_encrypt(&mycontext, payload+length, crc.f1, 4);
} else {
length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len ;
- *((__le32 *)crc) = getcrc32(payload, length);/* modified by Amy*/
+ crc.f0 = cpu_to_le32(~crc32_le(~0, payload, length));
+
arcfour_init(&mycontext, rc4key, 16);
arcfour_encrypt(&mycontext, payload, payload, length);
- arcfour_encrypt(&mycontext, payload+length, crc, 4);
+ arcfour_encrypt(&mycontext, payload+length, crc.f1, 4);
pframe += pxmitpriv->frag_len;
pframe = (u8 *)RND4((size_t)(pframe));
@@ -656,7 +649,10 @@ u32 rtw_tkip_decrypt(struct adapter *padapter, u8 *precvframe)
u32 pnh;
u8 rc4key[16];
u8 ttkey[16];
- u8 crc[4];
+ union {
+ __le32 f0;
+ u8 f1[4];
+ } crc;
struct arc4context mycontext;
int length;
@@ -702,12 +698,12 @@ u32 rtw_tkip_decrypt(struct adapter *padapter, u8 *precvframe)
arcfour_init(&mycontext, rc4key, 16);
arcfour_encrypt(&mycontext, payload, payload, length);
- *((__le32 *)crc) = getcrc32(payload, length-4);
+ crc.f0 = cpu_to_le32(~crc32_le(~0, payload, length));
- if (crc[3] != payload[length-1] ||
- crc[2] != payload[length-2] ||
- crc[1] != payload[length-3] ||
- crc[0] != payload[length-4]) {
+ if (crc.f1[3] != payload[length-1] ||
+ crc.f1[2] != payload[length-2] ||
+ crc.f1[1] != payload[length-3] ||
+ crc.f1[0] != payload[length-4]) {
RT_TRACE(_module_rtl871x_security_c_, _drv_err_,
("rtw_wep_decrypt:icv error crc (%4ph)!=payload (%4ph)\n",
&crc, &payload[length-4]));
--
2.32.0
Remove the functions and variables from rtw_security.c that are no more
necessary since the patch that replaces getcrc32() with crc32_le().
Signed-off-by: Fabio M. De Francesco <[email protected]>
---
drivers/staging/r8188eu/core/rtw_security.c | 37 ---------------------
1 file changed, 37 deletions(-)
diff --git a/drivers/staging/r8188eu/core/rtw_security.c b/drivers/staging/r8188eu/core/rtw_security.c
index 9625beea4b3c..136ba1e61dca 100644
--- a/drivers/staging/r8188eu/core/rtw_security.c
+++ b/drivers/staging/r8188eu/core/rtw_security.c
@@ -74,43 +74,6 @@ static void arcfour_encrypt(struct arc4context *parc4ctx, u8 *dest, u8 *src, u32
}
-static 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 {
- 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 : (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;
- }
-}
-
/*
Need to consider the fragment situation
*/
--
2.32.0
On 7/30/21 5:37 AM, Fabio M. De Francesco wrote:
> Remove the functions and variables from rtw_security.c that are no more
> necessary since the patch that replaces getcrc32() with crc32_le().
>
> Signed-off-by: Fabio M. De Francesco <[email protected]>
> ---
> drivers/staging/r8188eu/core/rtw_security.c | 37 ---------------------
> 1 file changed, 37 deletions(-)
>
> diff --git a/drivers/staging/r8188eu/core/rtw_security.c b/drivers/staging/r8188eu/core/rtw_security.c
> index 9625beea4b3c..136ba1e61dca 100644
> --- a/drivers/staging/r8188eu/core/rtw_security.c
> +++ b/drivers/staging/r8188eu/core/rtw_security.c
> @@ -74,43 +74,6 @@ static void arcfour_encrypt(struct arc4context *parc4ctx, u8 *dest, u8 *src, u32
>
> }
>
> -static 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 {
> - 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 : (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;
> - }
> -}
> -
> /*
> Need to consider the fragment situation
> */
>
These two patches are
Tested-by: Larry Finger <[email protected]>
Thanks for your contribution.
Larry