md5.c File Reference

MD5 algorithm. More...

#include <stdint.h>
#include <assert.h>
#include <ipxe/rotate.h>
#include <ipxe/crypto.h>
#include <ipxe/md5.h>

Go to the source code of this file.

Data Structures
struct	md5_variables
	MD5 variables. More...
struct	md5_step
	An MD5 step function. More...

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
	FILE_SECBOOT (PERMITTED)
static uint32_t	md5_f_0_15 (struct md5_variables *v)
	f(b,c,d) for steps 0 to 15
static uint32_t	md5_f_16_31 (struct md5_variables *v)
	f(b,c,d) for steps 16 to 31
static uint32_t	md5_f_32_47 (struct md5_variables *v)
	f(b,c,d) for steps 32 to 47
static uint32_t	md5_f_48_63 (struct md5_variables *v)
	f(b,c,d) for steps 48 to 63
static void	md5_compress (struct md5_digest_data *dd, const struct md5_digest *digest)
	Calculate MD5 digest of accumulated data.
	MDHASH_ALGORITHM (md5, md5_algorithm, md5_compress, __LITTLE_ENDIAN, struct md5_digest_data, md5_init, MD5_DIGEST_SIZE)
	MD5 algorithm.

Variables
static const uint32_t	k [64]
	MD5 constants.
static const uint8_t	r [4][4]
	MD5 shift amounts.
static const struct md5_step	md5_steps [4]
	MD5 steps.
static const struct md5_digest	md5_init
	MD5 initial digest values.

Detailed Description

MD5 algorithm.

Definition in file md5.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

FILE_SECBOOT()

FILE_SECBOOT

(

PERMITTED

)

md5_f_0_15()

uint32_t md5_f_0_15 ( struct md5_variables * v )

static

f(b,c,d) for steps 0 to 15

Parameters

v	MD5 variables

Return values

f

f(b,c,d)

Definition at line 78 of file md5.c.

                                                       {
        return ( v->d ^ ( v->b & ( v->c ^ v->d ) ) );
}

References md5_variables::b, md5_variables::c, and md5_variables::d.

md5_f_16_31()

uint32_t md5_f_16_31 ( struct md5_variables * v )

static

f(b,c,d) for steps 16 to 31

Parameters

v	MD5 variables

Return values

f

f(b,c,d)

Definition at line 88 of file md5.c.

                                                        {
        return ( v->c ^ ( v->d & ( v->b ^ v->c ) ) );
}

References md5_variables::b, md5_variables::c, and md5_variables::d.

md5_f_32_47()

uint32_t md5_f_32_47 ( struct md5_variables * v )

static

f(b,c,d) for steps 32 to 47

Parameters

v	MD5 variables

Return values

f

f(b,c,d)

Definition at line 98 of file md5.c.

                                                        {
        return ( v->b ^ v->c ^ v->d );
}

References md5_variables::b, md5_variables::c, and md5_variables::d.

md5_f_48_63()

uint32_t md5_f_48_63 ( struct md5_variables * v )

static

f(b,c,d) for steps 48 to 63

Parameters

v	MD5 variables

Return values

f

f(b,c,d)

Definition at line 108 of file md5.c.

                                                        {
        return ( v->c ^ ( v->b | (~v->d) ) );
}

References md5_variables::b, md5_variables::c, and md5_variables::d.

md5_compress()

void md5_compress ( struct md5_digest_data * dd, const struct md5_digest * digest )

static

Calculate MD5 digest of accumulated data.

Parameters

dd	Digest and data block
digest	Copy of current digest value

Definition at line 150 of file md5.c.

                                                             {
        union {
                struct md5_digest_data dd;
                struct md5_variables v;
        } *u = container_of ( dd, typeof ( *u ), dd );
        struct md5_variables *v = &u->v;
        const struct md5_step *step;
        uint32_t *a = &v->a;
        uint32_t *b = &v->b;
        uint32_t *c = &v->c;
        uint32_t *d = &v->d;
        uint32_t *w = v->w;
        uint32_t f;
        uint32_t g;
        uint32_t temp;
        unsigned int round;
        unsigned int i;
 
        /* Sanity checks */
        build_assert ( &u->dd.digest.h[0] == a );
        build_assert ( &u->dd.digest.h[1] == b );
        build_assert ( &u->dd.digest.h[2] == c );
        build_assert ( &u->dd.digest.h[3] == d );
        build_assert ( &u->dd.data.dword[0] == w );
        build_assert ( sizeof ( u->dd ) == sizeof ( u->v ) );
 
        /* Main loop */
        for ( i = 0 ; i < 64 ; i++ ) {
                round = ( i / 16 );
                step = &md5_steps[round];
                f = step->f ( v );
                g = ( ( ( step->coefficient * i ) + step->constant ) % 16 );
                temp = *d;
                *d = *c;
                *c = *b;
                *b = ( *b + rol32 ( ( *a + f + k[i] + w[g] ),
                                    r[round][ i % 4 ] ) );
                *a = temp;
                DBGC2 ( &md5_algorithm, "%2d : %08x %08x %08x %08x\n",
                        i, *a, *b, *c, *d );
        }
 
        /* Add chunk to hash */
        for ( i = 0 ; i < 4 ; i++ )
                dd->digest.h[i] += digest->h[i];
}

References md5_variables::a, md5_variables::b, build_assert, md5_variables::c, container_of, md5_variables::d, DBGC2, md5_digest_data::digest, md5_step::f, md5_digest::h, k, md5_algorithm, md5_steps, r, rol32(), step(), typeof(), u, and md5_variables::w.

Referenced by MDHASH_ALGORITHM().

MDHASH_ALGORITHM()

MDHASH_ALGORITHM	(	md5	,
		md5_algorithm	,
		md5_compress	,
		__LITTLE_ENDIAN	,
		struct md5_digest_data	,
		md5_init	,
		MD5_DIGEST_SIZE	)

MD5 algorithm.

References __LITTLE_ENDIAN, md5_algorithm, md5_compress(), MD5_DIGEST_SIZE, and md5_init.

Variable Documentation

k

const uint32_t k[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
}

MD5 constants.

Definition at line 50 of file md5.c.

                            {
        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
};

Referenced by ath9k_adjust_pdadc_values(), ath9k_change_gain_boundary_setting(), ath9k_hw_fill_vpd_table(), ath9k_hw_get_gain_boundaries_pdadcs(), atl_hw_reset(), atl_hw_reset_flb_(), atl_hw_reset_rbl_(), ecdsa_alloc(), ecdsa_sign_rs(), md5_compress(), sha1_compress(), sha256_compress(), sha512_compress(), and vxgetlink().

r

const uint8_t r[4][4]

static

Initial value:

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

MD5 shift amounts.

Definition at line 65 of file md5.c.

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

md5_steps

const struct md5_step md5_steps[4]

static

Initial value:

                            = {
        
        { .f = md5_f_0_15,      .coefficient = 1,       .constant = 0 },
        
        { .f = md5_f_16_31,     .coefficient = 5,       .constant = 1 },
        
        { .f = md5_f_32_47,     .coefficient = 3,       .constant = 5 },
        
        { .f = md5_f_48_63,     .coefficient = 7,       .constant = 0 },
}

MD5 steps.

Definition at line 128 of file md5.c.

                                          {
        /** 0 to 15 */
        { .f = md5_f_0_15,      .coefficient = 1,       .constant = 0 },
        /** 16 to 31 */
        { .f = md5_f_16_31,     .coefficient = 5,       .constant = 1 },
        /** 32 to 47 */
        { .f = md5_f_32_47,     .coefficient = 3,       .constant = 5 },
        /** 48 to 63 */
        { .f = md5_f_48_63,     .coefficient = 7,       .constant = 0 },
};

Referenced by md5_compress().

md5_init

const struct md5_digest md5_init

static

Initial value:

                             = {
        .h = { 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476 }
}

MD5 initial digest values.

Definition at line 140 of file md5.c.

                                        {
        .h = { 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476 }
};

Referenced by MDHASH_ALGORITHM().