md5.c File Reference

#include <stdint.h>
#include "bswap.h"
#include "intreadwrite.h"
#include "md5.h"
#include "mem.h"

Go to the source code of this file.

Data Structures
struct	AVMD5

Macros
#define	CORE(i, a, b, c, d)
#define	CORE2(i)
#define	CORE4(i)   CORE2(i); CORE2((i+4)); CORE2((i+8)); CORE2((i+12))

Functions
struct AVMD5 *	av_md5_alloc (void)
	Allocate an AVMD5 context.
static void	body (uint32_t ABCD[4], uint32_t *src, int nblocks)
void	av_md5_init (AVMD5 *ctx)
	Initialize MD5 hashing.
void	av_md5_update (AVMD5 *ctx, const uint8_t *src, int len)
	Update hash value.
void	av_md5_final (AVMD5 *ctx, uint8_t *dst)
	Finish hashing and output digest value.
void	av_md5_sum (uint8_t *dst, const uint8_t *src, const int len)
	Hash an array of data.

Variables
const int	av_md5_size = sizeof(AVMD5)
static const uint8_t	S [4][4]
static const uint32_t	T [64]

Macro Definition Documentation

#define CORE	(		i,
			a,
			b,
			c,
			d
	)

Value:

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 += ((d & b) | (~d & c)) + 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)

Definition at line 81 of file md5.c.

Referenced by body().

#define CORE2

(

i

)

Value:

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))

Referenced by body().

Function Documentation

static void body ( uint32_t  ABCD[4], uint32_t *  src, int  nblocks  )

static

Definition at line 95 of file md5.c.

Referenced by av_md5_update().

Variable Documentation

const uint8_t S[4][4]

static

Initial value:

= {
    { 7, 12, 17, 22 },  
    { 5,  9, 14, 20 },  
    { 4, 11, 16, 23 },  
    { 6, 10, 15, 21 }   
}

Definition at line 52 of file md5.c.

const uint32_t T[64]

static

Initial value:

= { 
    0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,   
    0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
    0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
    0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,

    0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,   
    0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8,
    0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
    0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,

    0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,   
    0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
    0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05,
    0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,

    0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,   
    0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
    0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
    0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391,
}

Definition at line 59 of file md5.c.