md5.c File Reference

#include "postgres.h"
#include "md5_int.h"

Include dependency graph for md5.c:

Go to the source code of this file.

Macros
#define	SHIFT(X, s)   (((X) << (s)) | ((X) >> (32 - (s))))
#define	F(X, Y, Z)   (((X) & (Y)) | ((~X) & (Z)))
#define	G(X, Y, Z)   (((X) & (Z)) | ((Y) & (~Z)))
#define	H(X, Y, Z)   ((X) ^ (Y) ^ (Z))
#define	I(X, Y, Z)   ((Y) ^ ((X) | (~Z)))
#define	ROUND1(a, b, c, d, k, s, i)
#define	ROUND2(a, b, c, d, k, s, i)
#define	ROUND3(a, b, c, d, k, s, i)
#define	ROUND4(a, b, c, d, k, s, i)
#define	Sa   7
#define	Sb   12
#define	Sc   17
#define	Sd   22
#define	Se   5
#define	Sf   9
#define	Sg   14
#define	Sh   20
#define	Si   4
#define	Sj   11
#define	Sk   16
#define	Sl   23
#define	Sm   6
#define	Sn   10
#define	So   15
#define	Sp   21
#define	MD5_A0   0x67452301
#define	MD5_B0   0xefcdab89
#define	MD5_C0   0x98badcfe
#define	MD5_D0   0x10325476

Functions
static void	md5_calc (const uint8 *b64, pg_md5_ctx *ctx)
static void	md5_pad (pg_md5_ctx *ctx)
static void	md5_result (uint8 *digest, pg_md5_ctx *ctx)
void	pg_md5_init (pg_md5_ctx *ctx)
void	pg_md5_update (pg_md5_ctx *ctx, const uint8 *data, size_t len)
void	pg_md5_final (pg_md5_ctx *ctx, uint8 *dest)

Variables
static const uint32	T [65]
static const uint8	md5_paddat [MD5_BUFLEN]

Macro Definition Documentation

F

#define F	(		X,
			Y,
			Z
	)		(((X) & (Y)) | ((~X) & (Z)))

Definition at line 60 of file md5.c.

G

#define G	(		X,
			Y,
			Z
	)		(((X) & (Z)) | ((Y) & (~Z)))

Definition at line 61 of file md5.c.

H

#define H	(		X,
			Y,
			Z
	)		((X) ^ (Y) ^ (Z))

Definition at line 62 of file md5.c.

I

#define I	(		X,
			Y,
			Z
	)		((Y) ^ ((X) | (~Z)))

Definition at line 63 of file md5.c.

MD5_A0

#define MD5_A0   0x67452301

Definition at line 113 of file md5.c.

MD5_B0

#define MD5_B0   0xefcdab89

Definition at line 114 of file md5.c.

MD5_C0

#define MD5_C0   0x98badcfe

Definition at line 115 of file md5.c.

MD5_D0

#define MD5_D0   0x10325476

Definition at line 116 of file md5.c.

ROUND1

#define ROUND1	(		a,
			b,
			c,
			d,
			k,
			s,
			i
	)

Value:

do { \
    (a) = (a) + F((b), (c), (d)) + X[(k)] + T[(i)]; \
    (a) = SHIFT((a), (s)); \
    (a) = (b) + (a); \
} while (0)

Definition at line 65 of file md5.c.

ROUND2

#define ROUND2	(		a,
			b,
			c,
			d,
			k,
			s,
			i
	)

Value:

do { \
    (a) = (a) + G((b), (c), (d)) + X[(k)] + T[(i)]; \
    (a) = SHIFT((a), (s)); \
    (a) = (b) + (a); \
} while (0)

Definition at line 72 of file md5.c.

ROUND3

#define ROUND3	(		a,
			b,
			c,
			d,
			k,
			s,
			i
	)

Value:

do { \
    (a) = (a) + H((b), (c), (d)) + X[(k)] + T[(i)]; \
    (a) = SHIFT((a), (s)); \
    (a) = (b) + (a); \
} while (0)

Definition at line 79 of file md5.c.

ROUND4

#define ROUND4	(		a,
			b,
			c,
			d,
			k,
			s,
			i
	)

Value:

do { \
    (a) = (a) + I((b), (c), (d)) + X[(k)] + T[(i)]; \
    (a) = SHIFT((a), (s)); \
    (a) = (b) + (a); \
} while (0)

Definition at line 86 of file md5.c.

Sa

#define Sa   7

Definition at line 93 of file md5.c.

Sb

#define Sb   12

Definition at line 94 of file md5.c.

Sc

#define Sc   17

Definition at line 95 of file md5.c.

Sd

#define Sd   22

Definition at line 96 of file md5.c.

Se

#define Se   5

Definition at line 98 of file md5.c.

Sf

#define Sf   9

Definition at line 99 of file md5.c.

Sg

#define Sg   14

Definition at line 100 of file md5.c.

Sh

#define Sh   20

Definition at line 101 of file md5.c.

SHIFT

#define SHIFT	(		X,
			s
	)		(((X) << (s)) | ((X) >> (32 - (s))))

Definition at line 58 of file md5.c.

Si

#define Si   4

Definition at line 103 of file md5.c.

Sj

#define Sj   11

Definition at line 104 of file md5.c.

Sk

#define Sk   16

Definition at line 105 of file md5.c.

Sl

#define Sl   23

Definition at line 106 of file md5.c.

Sm

#define Sm   6

Definition at line 108 of file md5.c.

Sn

#define Sn   10

Definition at line 109 of file md5.c.

So

#define So   15

Definition at line 110 of file md5.c.

Sp

#define Sp   21

Definition at line 111 of file md5.c.

Function Documentation

md5_calc()

static void md5_calc ( const uint8 *  b64, pg_md5_ctx *  ctx  )

static

Definition at line 158 of file md5.c.

{
    uint32      A = ctx->md5_sta;
    uint32      B = ctx->md5_stb;
    uint32      C = ctx->md5_stc;
    uint32      D = ctx->md5_std;
 
#ifndef WORDS_BIGENDIAN
    const uint32 *X = (const uint32 *) b64;
#else
    /* 4 byte words */
    /* what a brute force but fast! */
    uint8      *y = (uint8 *) X;
 
    y[0] = b64[3];
    y[1] = b64[2];
    y[2] = b64[1];
    y[3] = b64[0];
    y[4] = b64[7];
    y[5] = b64[6];
    y[6] = b64[5];
    y[7] = b64[4];
    y[8] = b64[11];
    y[9] = b64[10];
    y[10] = b64[9];
    y[11] = b64[8];
    y[12] = b64[15];
    y[13] = b64[14];
    y[14] = b64[13];
    y[15] = b64[12];
    y[16] = b64[19];
    y[17] = b64[18];
    y[18] = b64[17];
    y[19] = b64[16];
    y[20] = b64[23];
    y[21] = b64[22];
    y[22] = b64[21];
    y[23] = b64[20];
    y[24] = b64[27];
    y[25] = b64[26];
    y[26] = b64[25];
    y[27] = b64[24];
    y[28] = b64[31];
    y[29] = b64[30];
    y[30] = b64[29];
    y[31] = b64[28];
    y[32] = b64[35];
    y[33] = b64[34];
    y[34] = b64[33];
    y[35] = b64[32];
    y[36] = b64[39];
    y[37] = b64[38];
    y[38] = b64[37];
    y[39] = b64[36];
    y[40] = b64[43];
    y[41] = b64[42];
    y[42] = b64[41];
    y[43] = b64[40];
    y[44] = b64[47];
    y[45] = b64[46];
    y[46] = b64[45];
    y[47] = b64[44];
    y[48] = b64[51];
    y[49] = b64[50];
    y[50] = b64[49];
    y[51] = b64[48];
    y[52] = b64[55];
    y[53] = b64[54];
    y[54] = b64[53];
    y[55] = b64[52];
    y[56] = b64[59];
    y[57] = b64[58];
    y[58] = b64[57];
    y[59] = b64[56];
    y[60] = b64[63];
    y[61] = b64[62];
    y[62] = b64[61];
    y[63] = b64[60];
#endif
 
    ROUND1(A, B, C, D, 0, Sa, 1);
    ROUND1(D, A, B, C, 1, Sb, 2);
    ROUND1(C, D, A, B, 2, Sc, 3);
    ROUND1(B, C, D, A, 3, Sd, 4);
    ROUND1(A, B, C, D, 4, Sa, 5);
    ROUND1(D, A, B, C, 5, Sb, 6);
    ROUND1(C, D, A, B, 6, Sc, 7);
    ROUND1(B, C, D, A, 7, Sd, 8);
    ROUND1(A, B, C, D, 8, Sa, 9);
    ROUND1(D, A, B, C, 9, Sb, 10);
    ROUND1(C, D, A, B, 10, Sc, 11);
    ROUND1(B, C, D, A, 11, Sd, 12);
    ROUND1(A, B, C, D, 12, Sa, 13);
    ROUND1(D, A, B, C, 13, Sb, 14);
    ROUND1(C, D, A, B, 14, Sc, 15);
    ROUND1(B, C, D, A, 15, Sd, 16);
 
    ROUND2(A, B, C, D, 1, Se, 17);
    ROUND2(D, A, B, C, 6, Sf, 18);
    ROUND2(C, D, A, B, 11, Sg, 19);
    ROUND2(B, C, D, A, 0, Sh, 20);
    ROUND2(A, B, C, D, 5, Se, 21);
    ROUND2(D, A, B, C, 10, Sf, 22);
    ROUND2(C, D, A, B, 15, Sg, 23);
    ROUND2(B, C, D, A, 4, Sh, 24);
    ROUND2(A, B, C, D, 9, Se, 25);
    ROUND2(D, A, B, C, 14, Sf, 26);
    ROUND2(C, D, A, B, 3, Sg, 27);
    ROUND2(B, C, D, A, 8, Sh, 28);
    ROUND2(A, B, C, D, 13, Se, 29);
    ROUND2(D, A, B, C, 2, Sf, 30);
    ROUND2(C, D, A, B, 7, Sg, 31);
    ROUND2(B, C, D, A, 12, Sh, 32);
 
    ROUND3(A, B, C, D, 5, Si, 33);
    ROUND3(D, A, B, C, 8, Sj, 34);
    ROUND3(C, D, A, B, 11, Sk, 35);
    ROUND3(B, C, D, A, 14, Sl, 36);
    ROUND3(A, B, C, D, 1, Si, 37);
    ROUND3(D, A, B, C, 4, Sj, 38);
    ROUND3(C, D, A, B, 7, Sk, 39);
    ROUND3(B, C, D, A, 10, Sl, 40);
    ROUND3(A, B, C, D, 13, Si, 41);
    ROUND3(D, A, B, C, 0, Sj, 42);
    ROUND3(C, D, A, B, 3, Sk, 43);
    ROUND3(B, C, D, A, 6, Sl, 44);
    ROUND3(A, B, C, D, 9, Si, 45);
    ROUND3(D, A, B, C, 12, Sj, 46);
    ROUND3(C, D, A, B, 15, Sk, 47);
    ROUND3(B, C, D, A, 2, Sl, 48);
 
    ROUND4(A, B, C, D, 0, Sm, 49);
    ROUND4(D, A, B, C, 7, Sn, 50);
    ROUND4(C, D, A, B, 14, So, 51);
    ROUND4(B, C, D, A, 5, Sp, 52);
    ROUND4(A, B, C, D, 12, Sm, 53);
    ROUND4(D, A, B, C, 3, Sn, 54);
    ROUND4(C, D, A, B, 10, So, 55);
    ROUND4(B, C, D, A, 1, Sp, 56);
    ROUND4(A, B, C, D, 8, Sm, 57);
    ROUND4(D, A, B, C, 15, Sn, 58);
    ROUND4(C, D, A, B, 6, So, 59);
    ROUND4(B, C, D, A, 13, Sp, 60);
    ROUND4(A, B, C, D, 4, Sm, 61);
    ROUND4(D, A, B, C, 11, Sn, 62);
    ROUND4(C, D, A, B, 2, So, 63);
    ROUND4(B, C, D, A, 9, Sp, 64);
 
    ctx->md5_sta += A;
    ctx->md5_stb += B;
    ctx->md5_stc += C;
    ctx->md5_std += D;
}

References ROUND1, ROUND2, ROUND3, ROUND4, Sa, Sb, Sc, Sd, Se, Sf, Sg, Sh, Si, Sj, Sk, Sl, Sm, Sn, So, Sp, and y.

Referenced by md5_pad(), and pg_md5_update().

md5_pad()

static void md5_pad ( pg_md5_ctx *  ctx )

static

Definition at line 313 of file md5.c.

{
    unsigned int gap;
 
    /* Don't count up padding. Keep md5_n. */
    gap = MD5_BUFLEN - ctx->md5_i;
    if (gap > 8)
    {
        memmove(ctx->md5_buf + ctx->md5_i, md5_paddat,
                gap - sizeof(ctx->md5_n));
    }
    else
    {
        /* including gap == 8 */
        memmove(ctx->md5_buf + ctx->md5_i, md5_paddat, gap);
        md5_calc(ctx->md5_buf, ctx);
        memmove(ctx->md5_buf, md5_paddat + gap,
                MD5_BUFLEN - sizeof(ctx->md5_n));
    }
 
    /* 8 byte word */
#ifndef WORDS_BIGENDIAN
    memmove(&ctx->md5_buf[56], &ctx->md5_n8[0], 8);
#else
    ctx->md5_buf[56] = ctx->md5_n8[7];
    ctx->md5_buf[57] = ctx->md5_n8[6];
    ctx->md5_buf[58] = ctx->md5_n8[5];
    ctx->md5_buf[59] = ctx->md5_n8[4];
    ctx->md5_buf[60] = ctx->md5_n8[3];
    ctx->md5_buf[61] = ctx->md5_n8[2];
    ctx->md5_buf[62] = ctx->md5_n8[1];
    ctx->md5_buf[63] = ctx->md5_n8[0];
#endif
 
    md5_calc(ctx->md5_buf, ctx);
}

References pg_md5_ctx::md5_buf, MD5_BUFLEN, md5_calc(), pg_md5_ctx::md5_i, and md5_paddat.

Referenced by pg_md5_final().

md5_result()

static void md5_result ( uint8 *  digest, pg_md5_ctx *  ctx  )

static

Definition at line 351 of file md5.c.

{
    /* 4 byte words */
#ifndef WORDS_BIGENDIAN
    memmove(digest, &ctx->md5_st8[0], 16);
#else
    digest[0] = ctx->md5_st8[3];
    digest[1] = ctx->md5_st8[2];
    digest[2] = ctx->md5_st8[1];
    digest[3] = ctx->md5_st8[0];
    digest[4] = ctx->md5_st8[7];
    digest[5] = ctx->md5_st8[6];
    digest[6] = ctx->md5_st8[5];
    digest[7] = ctx->md5_st8[4];
    digest[8] = ctx->md5_st8[11];
    digest[9] = ctx->md5_st8[10];
    digest[10] = ctx->md5_st8[9];
    digest[11] = ctx->md5_st8[8];
    digest[12] = ctx->md5_st8[15];
    digest[13] = ctx->md5_st8[14];
    digest[14] = ctx->md5_st8[13];
    digest[15] = ctx->md5_st8[12];
#endif
}

Referenced by pg_md5_final().

pg_md5_final()

void pg_md5_final	(	pg_md5_ctx *	ctx,
		uint8 *	dest
	)

Definition at line 435 of file md5.c.

{
    md5_pad(ctx);
    md5_result(dest, ctx);
}

References generate_unaccent_rules::dest, md5_pad(), and md5_result().

Referenced by pg_cryptohash_final().

pg_md5_init()

void pg_md5_init

(

pg_md5_ctx *

ctx

)

Definition at line 385 of file md5.c.

{
    ctx->md5_n = 0;
    ctx->md5_i = 0;
    ctx->md5_sta = MD5_A0;
    ctx->md5_stb = MD5_B0;
    ctx->md5_stc = MD5_C0;
    ctx->md5_std = MD5_D0;
    memset(ctx->md5_buf, 0, sizeof(ctx->md5_buf));
}

References MD5_A0, MD5_B0, pg_md5_ctx::md5_buf, MD5_C0, MD5_D0, and pg_md5_ctx::md5_i.

Referenced by pg_cryptohash_init().

pg_md5_update()

void pg_md5_update	(	pg_md5_ctx *	ctx,
		const uint8 *	data,
		size_t	len
	)

Definition at line 403 of file md5.c.

{
    unsigned int gap,
                i;
 
    ctx->md5_n += len * 8;      /* byte to bit */
    gap = MD5_BUFLEN - ctx->md5_i;
 
    if (len >= gap)
    {
        memmove(ctx->md5_buf + ctx->md5_i, data, gap);
        md5_calc(ctx->md5_buf, ctx);
 
        for (i = gap; i + MD5_BUFLEN <= len; i += MD5_BUFLEN)
            md5_calc(data + i, ctx);
 
        ctx->md5_i = len - i;
        memmove(ctx->md5_buf, data + i, ctx->md5_i);
    }
    else
    {
        memmove(ctx->md5_buf + ctx->md5_i, data, len);
        ctx->md5_i += len;
    }
}

References data, i, len, pg_md5_ctx::md5_buf, MD5_BUFLEN, md5_calc(), and pg_md5_ctx::md5_i.

Referenced by pg_cryptohash_update().

Variable Documentation

md5_paddat

const uint8 md5_paddat[MD5_BUFLEN]

static

Initial value:

= {
    0x80, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0,
}

Definition at line 142 of file md5.c.

Referenced by md5_pad().

T

const uint32 T[65]

static

Initial value:

= {
    0,
    0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
    0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
    0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
    0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
 
    0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,
    0xd62f105d, 0x2441453, 0xd8a1e681, 0xe7d3fbc8,
    0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
    0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
 
    0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
    0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
    0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x4881d05,
    0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
 
    0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,
    0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
    0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
    0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391,
}

Definition at line 119 of file md5.c.

Referenced by compute_bitmap_pages(), cost_bitmap_heap_scan(), fetch_att(), index_pages_fetched(), and store_att_byval().