Skip to content
Projects
Groups
Snippets
Help
Loading...
Sign in / Register
Toggle navigation
F
ffmpeg
Project
Project
Details
Activity
Cycle Analytics
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Charts
Issues
0
Issues
0
List
Board
Labels
Milestones
Merge Requests
0
Merge Requests
0
CI / CD
CI / CD
Pipelines
Jobs
Schedules
Charts
Packages
Packages
Wiki
Wiki
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Charts
Create a new issue
Jobs
Commits
Issue Boards
Open sidebar
submodule
ffmpeg
Commits
82494cad
Commit
82494cad
authored
Jul 03, 2011
by
Mans Rullgard
Browse files
Options
Browse Files
Download
Email Patches
Plain Diff
md5: cosmetics
Signed-off-by:
Mans Rullgard
<
mans@mansr.com
>
parent
fa49fc72
Hide whitespace changes
Inline
Side-by-side
Showing
1 changed file
with
61 additions
and
48 deletions
+61
-48
md5.c
libavutil/md5.c
+61
-48
No files found.
libavutil/md5.c
View file @
82494cad
...
...
@@ -41,7 +41,7 @@ typedef struct AVMD5{
uint32_t
ABCD
[
4
];
}
AVMD5
;
const
int
av_md5_size
=
sizeof
(
AVMD5
);
const
int
av_md5_size
=
sizeof
(
AVMD5
);
static
const
uint8_t
S
[
4
][
4
]
=
{
{
7
,
12
,
17
,
22
},
/* round 1 */
...
...
@@ -72,42 +72,49 @@ static const uint32_t T[64] = { // T[i]= fabs(sin(i+1)<<32)
0xf7537e82
,
0xbd3af235
,
0x2ad7d2bb
,
0xeb86d391
,
};
#define CORE(i, a, b, c, d) \
t = S[i>>4][i&3];\
a += T[i];\
\
if(i<32){\
if(i<16) a += (d ^ (b&(c^d))) + X[ i &15 ];\
else a += (c ^ (d&(c^b))) + X[ (1+5*i)&15 ];\
}else{\
if(i<48) a += (b^c^d) + X[ (5+3*i)&15 ];\
else a += (c^(b|~d)) + X[ ( 7*i)&15 ];\
}\
a = b + (( a << t ) | ( a >> (32 - t) ));
static
void
body
(
uint32_t
ABCD
[
4
],
uint32_t
X
[
16
]){
#define CORE(i, a, b, c, d) do { \
t = S[i >> 4][i & 3]; \
a += T[i]; \
\
if (i < 32) { \
if (i < 16) a += (d ^ (b & (c ^ d))) + X[ i & 15]; \
else a += (c ^ (d & (c ^ b))) + X[(1 + 5*i) & 15]; \
} else { \
if (i < 48) a += (b ^ c ^ d) + X[(5 + 3*i) & 15]; \
else a += (c ^ (b | ~d)) + X[( 7*i) & 15]; \
} \
a = b + (a << t | a >> (32 - t)); \
} while (0)
static
void
body
(
uint32_t
ABCD
[
4
],
uint32_t
X
[
16
])
{
int
t
;
int
i
av_unused
;
unsigned
int
a
=
ABCD
[
3
];
unsigned
int
b
=
ABCD
[
2
];
unsigned
int
c
=
ABCD
[
1
];
unsigned
int
d
=
ABCD
[
0
];
unsigned
int
a
=
ABCD
[
3
];
unsigned
int
b
=
ABCD
[
2
];
unsigned
int
c
=
ABCD
[
1
];
unsigned
int
d
=
ABCD
[
0
];
#if HAVE_BIGENDIAN
for
(
i
=
0
;
i
<
16
;
i
++
)
X
[
i
]
=
av_bswap32
(
X
[
i
]);
for
(
i
=
0
;
i
<
16
;
i
++
)
X
[
i
]
=
av_bswap32
(
X
[
i
]);
#endif
#if CONFIG_SMALL
for
(
i
=
0
;
i
<
64
;
i
++
){
CORE
(
i
,
a
,
b
,
c
,
d
)
t
=
d
;
d
=
c
;
c
=
b
;
b
=
a
;
a
=
t
;
for
(
i
=
0
;
i
<
64
;
i
++
)
{
CORE
(
i
,
a
,
b
,
c
,
d
);
t
=
d
;
d
=
c
;
c
=
b
;
b
=
a
;
a
=
t
;
}
#else
#define CORE2(i) CORE(i,a,b,c,d) CORE((i+1),d,a,b,c) CORE((i+2),c,d,a,b) CORE((i+3),b,c,d,a)
#define CORE4(i) CORE2(i) CORE2((i+4)) CORE2((i+8)) CORE2((i+12))
CORE4
(
0
)
CORE4
(
16
)
CORE4
(
32
)
CORE4
(
48
)
#define CORE2(i) \
CORE( i, a,b,c,d); CORE((i+1),d,a,b,c); \
CORE((i+2),c,d,a,b); CORE((i+3),b,c,d,a)
#define CORE4(i) CORE2(i); CORE2((i+4)); CORE2((i+8)); CORE2((i+12))
CORE4
(
0
);
CORE4
(
16
);
CORE4
(
32
);
CORE4
(
48
);
#endif
ABCD
[
0
]
+=
d
;
...
...
@@ -116,8 +123,9 @@ CORE4(0) CORE4(16) CORE4(32) CORE4(48)
ABCD
[
3
]
+=
a
;
}
void
av_md5_init
(
AVMD5
*
ctx
){
ctx
->
len
=
0
;
void
av_md5_init
(
AVMD5
*
ctx
)
{
ctx
->
len
=
0
;
ctx
->
ABCD
[
0
]
=
0x10325476
;
ctx
->
ABCD
[
1
]
=
0x98badcfe
;
...
...
@@ -125,41 +133,44 @@ void av_md5_init(AVMD5 *ctx){
ctx
->
ABCD
[
3
]
=
0x67452301
;
}
void
av_md5_update
(
AVMD5
*
ctx
,
const
uint8_t
*
src
,
const
int
len
){
void
av_md5_update
(
AVMD5
*
ctx
,
const
uint8_t
*
src
,
const
int
len
)
{
int
i
,
j
;
j
=
ctx
->
len
&
63
;
j
=
ctx
->
len
&
63
;
ctx
->
len
+=
len
;
for
(
i
=
0
;
i
<
len
;
i
++
)
{
for
(
i
=
0
;
i
<
len
;
i
++
)
{
ctx
->
block
[
j
++
]
=
src
[
i
];
if
(
64
==
j
)
{
body
(
ctx
->
ABCD
,
(
uint32_t
*
)
ctx
->
block
);
if
(
j
==
64
)
{
body
(
ctx
->
ABCD
,
(
uint32_t
*
)
ctx
->
block
);
j
=
0
;
}
}
}
void
av_md5_final
(
AVMD5
*
ctx
,
uint8_t
*
dst
){
void
av_md5_final
(
AVMD5
*
ctx
,
uint8_t
*
dst
)
{
int
i
;
uint64_t
finalcount
=
av_le2ne64
(
ctx
->
len
<<
3
);
uint64_t
finalcount
=
av_le2ne64
(
ctx
->
len
<<
3
);
av_md5_update
(
ctx
,
"
\200
"
,
1
);
while
((
ctx
->
len
&
63
)
!=
56
)
while
((
ctx
->
len
&
63
)
!=
56
)
av_md5_update
(
ctx
,
""
,
1
);
av_md5_update
(
ctx
,
(
uint8_t
*
)
&
finalcount
,
8
);
av_md5_update
(
ctx
,
(
uint8_t
*
)
&
finalcount
,
8
);
for
(
i
=
0
;
i
<
4
;
i
++
)
AV_WL32
(
dst
+
4
*
i
,
ctx
->
ABCD
[
3
-
i
]);
for
(
i
=
0
;
i
<
4
;
i
++
)
AV_WL32
(
dst
+
4
*
i
,
ctx
->
ABCD
[
3
-
i
]);
}
void
av_md5_sum
(
uint8_t
*
dst
,
const
uint8_t
*
src
,
const
int
len
){
AVMD5
ctx
[
1
];
void
av_md5_sum
(
uint8_t
*
dst
,
const
uint8_t
*
src
,
const
int
len
)
{
AVMD5
ctx
;
av_md5_init
(
ctx
);
av_md5_update
(
ctx
,
src
,
len
);
av_md5_final
(
ctx
,
dst
);
av_md5_init
(
&
ctx
);
av_md5_update
(
&
ctx
,
src
,
len
);
av_md5_final
(
&
ctx
,
dst
);
}
#ifdef TEST
...
...
@@ -179,12 +190,14 @@ int main(void){
int
i
;
uint8_t
in
[
1000
];
for
(
i
=
0
;
i
<
1000
;
i
++
)
in
[
i
]
=
i
*
i
;
for
(
i
=
0
;
i
<
1000
;
i
++
)
in
[
i
]
=
i
*
i
;
av_md5_sum
(
md5val
,
in
,
1000
);
print_md5
(
md5val
);
av_md5_sum
(
md5val
,
in
,
63
);
print_md5
(
md5val
);
av_md5_sum
(
md5val
,
in
,
64
);
print_md5
(
md5val
);
av_md5_sum
(
md5val
,
in
,
65
);
print_md5
(
md5val
);
for
(
i
=
0
;
i
<
1000
;
i
++
)
in
[
i
]
=
i
%
127
;
for
(
i
=
0
;
i
<
1000
;
i
++
)
in
[
i
]
=
i
%
127
;
av_md5_sum
(
md5val
,
in
,
999
);
print_md5
(
md5val
);
return
0
;
...
...
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment