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体验新版 GitCode,发现更多精彩内容 >>
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e6e29bc4
编写于
10月 28, 2013
作者:
A
Andy Polyakov
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
engines/e_aep.c: make it BN_ULONG-size and endian "neutral".
上级
4eeb750d
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
61 addition
and
43 deletion
+61
-43
engines/e_aep.c
engines/e_aep.c
+61
-43
未找到文件。
engines/e_aep.c
浏览文件 @
e6e29bc4
...
...
@@ -1052,13 +1052,10 @@ static AEP_RV GetBigNumSize(AEP_VOID_PTR ArbBigNum, AEP_U32* BigNumSize)
/*Cast the ArbBigNum pointer to our BIGNUM struct*/
bn
=
(
BIGNUM
*
)
ArbBigNum
;
#ifdef SIXTY_FOUR_BIT_LONG
*
BigNumSize
=
bn
->
top
<<
3
;
#else
/*Size of the bignum in bytes is equal to the bn->top (no of 32 bit
words) multiplies by 4*/
*
BigNumSize
=
bn
->
top
<<
2
;
#endif
*
BigNumSize
=
bn
->
top
*
BN_BYTES
;
if
(
BN_BYTES
>
sizeof
(
AEP_U32
)
&&
(
bn
->
d
[
bn
->
top
-
1
]
>>
BN_BITS4
)
==
0
)
*
BigNumSize
-=
4
;
return
AEP_R_OK
;
}
...
...
@@ -1067,31 +1064,42 @@ static AEP_RV MakeAEPBigNum(AEP_VOID_PTR ArbBigNum, AEP_U32 BigNumSize,
unsigned
char
*
AEP_BigNum
)
{
BIGNUM
*
bn
;
#ifndef SIXTY_FOUR_BIT_LONG
unsigned
char
*
buf
;
int
i
;
#endif
const
union
{
long
one
;
char
little
;
}
is_endian
=
{
1
};
int
i
,
j
;
/*Cast the ArbBigNum pointer to our BIGNUM struct*/
bn
=
(
BIGNUM
*
)
ArbBigNum
;
#ifdef SIXTY_FOUR_BIT_LONG
memcpy
(
AEP_BigNum
,
bn
->
d
,
BigNumSize
);
#else
/*Must copy data into a (monotone) least significant byte first format
performing endian conversion if necessary*/
for
(
i
=
0
;
i
<
bn
->
top
;
i
++
)
if
(
is_endian
.
little
&&
sizeof
(
bn
->
d
[
0
])
==
BN_BYTES
)
memcpy
(
AEP_BigNum
,
bn
->
d
,
BigNumSize
);
else
{
buf
=
(
unsigned
char
*
)
&
bn
->
d
[
i
]
;
BN_ULONG
di
;
*
((
AEP_U32
*
)
AEP_BigNum
)
=
(
AEP_U32
)
((
unsigned
)
buf
[
1
]
<<
8
|
buf
[
0
])
|
((
unsigned
)
buf
[
3
]
<<
8
|
buf
[
2
])
<<
16
;
for
(
i
=
0
;
BigNumSize
>=
BN_BYTES
;
i
++
)
{
di
=
bn
->
d
[
i
];
for
(
j
=
0
;
j
<
BN_BYTES
;
j
++
)
{
AEP_BigNum
[
j
]
=
(
unsigned
char
)
di
;
di
>>=
8
;
}
AEP_BigNum
+=
BN_BYTES
;
BigNumSize
-=
BN_BYTES
;
}
AEP_BigNum
+=
4
;
if
(
BigNumSize
)
{
di
=
bn
->
d
[
i
];
for
(
j
=
0
;
j
<
BigNumSize
;
j
++
)
{
AEP_BigNum
[
j
]
=
(
unsigned
char
)
di
;
di
>>=
8
;
}
}
}
#endif
return
AEP_R_OK
;
}
...
...
@@ -1101,36 +1109,46 @@ static AEP_RV ConvertAEPBigNum(void* ArbBigNum, AEP_U32 BigNumSize,
unsigned
char
*
AEP_BigNum
)
{
BIGNUM
*
bn
;
#ifndef SIXTY_FOUR_BIT_LONG
int
i
;
#endif
const
union
{
long
one
;
char
little
;
}
is_endian
=
{
1
};
int
i
,
j
,
top
;
bn
=
(
BIGNUM
*
)
ArbBigNum
;
/*Expand the result bn so that it can hold our big num.
Size is in bits*/
bn_expand
(
bn
,
(
int
)(
BigNumSize
<<
3
));
top
=
(
BigNumSize
+
BN_BYTES
-
1
)
/
BN_BYTES
;
bn_expand
(
bn
,
top
);
bn
->
top
=
top
;
bn
->
d
[
top
-
1
]
=
0
;
#ifdef SIXTY_FOUR_BIT_LONG
bn
->
top
=
BigNumSize
>>
3
;
if
((
BigNumSize
&
7
)
!=
0
)
bn
->
top
++
;
if
(
is_endian
.
little
&&
sizeof
(
bn
->
d
[
0
])
==
BN_BYTES
)
memcpy
(
bn
->
d
,
AEP_BigNum
,
BigNumSize
)
;
else
{
BN_ULONG
di
;
memset
(
bn
->
d
,
0
,
bn
->
top
<<
3
);
for
(
i
=
0
;
BigNumSize
>=
BN_BYTES
;
i
++
)
{
for
(
di
=
0
,
j
=
BN_BYTES
;
j
!=
0
;
)
{
di
<<=
8
;
di
|=
AEP_BigNum
[
--
j
];
}
bn
->
d
[
i
]
=
di
;
AEP_BigNum
+=
BN_BYTES
;
BigNumSize
-=
BN_BYTES
;
}
memcpy
(
bn
->
d
,
AEP_BigNum
,
BigNumSize
);
#else
bn
->
top
=
BigNumSize
>>
2
;
for
(
i
=
0
;
i
<
bn
->
top
;
i
++
)
{
bn
->
d
[
i
]
=
(
AEP_U32
)
((
unsigned
)
AEP_BigNum
[
3
]
<<
8
|
AEP_BigNum
[
2
])
<<
16
|
((
unsigned
)
AEP_BigNum
[
1
]
<<
8
|
AEP_BigNum
[
0
]);
AEP_BigNum
+=
4
;
if
(
BigNumSize
)
{
for
(
di
=
0
,
j
=
BigNumSize
;
j
!=
0
;
)
{
di
<<=
8
;
di
|=
AEP_BigNum
[
--
j
];
}
bn
->
d
[
i
]
=
di
;
}
}
#endif
return
AEP_R_OK
;
}
...
...
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