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-rw-r--r--qemu/roms/ipxe/src/crypto/md5.c302
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diff --git a/qemu/roms/ipxe/src/crypto/md5.c b/qemu/roms/ipxe/src/crypto/md5.c
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-/*
- * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- * You can also choose to distribute this program under the terms of
- * the Unmodified Binary Distribution Licence (as given in the file
- * COPYING.UBDL), provided that you have satisfied its requirements.
- */
-
-FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
-
-/** @file
- *
- * MD5 algorithm
- *
- */
-
-#include <stdint.h>
-#include <string.h>
-#include <byteswap.h>
-#include <assert.h>
-#include <ipxe/rotate.h>
-#include <ipxe/crypto.h>
-#include <ipxe/asn1.h>
-#include <ipxe/md5.h>
-
-/** MD5 variables */
-struct md5_variables {
- /* This layout matches that of struct md5_digest_data,
- * allowing for efficient endianness-conversion,
- */
- uint32_t a;
- uint32_t b;
- uint32_t c;
- uint32_t d;
- uint32_t w[16];
-} __attribute__ (( packed ));
-
-/** MD5 constants */
-static const uint32_t k[64] = {
- 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 shift amounts */
-static const uint8_t r[64] = {
- 7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22,
- 5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20,
- 4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23,
- 6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21
-};
-
-/**
- * f(b,c,d) for steps 0 to 15
- *
- * @v v MD5 variables
- * @ret f f(b,c,d)
- */
-static uint32_t md5_f_0_15 ( struct md5_variables *v ) {
- return ( v->d ^ ( v->b & ( v->c ^ v->d ) ) );
-}
-
-/**
- * f(b,c,d) for steps 16 to 31
- *
- * @v v MD5 variables
- * @ret f f(b,c,d)
- */
-static uint32_t md5_f_16_31 ( struct md5_variables *v ) {
- return ( v->c ^ ( v->d & ( v->b ^ v->c ) ) );
-}
-
-/**
- * f(b,c,d) for steps 32 to 47
- *
- * @v v MD5 variables
- * @ret f f(b,c,d)
- */
-static uint32_t md5_f_32_47 ( struct md5_variables *v ) {
- return ( v->b ^ v->c ^ v->d );
-}
-
-/**
- * f(b,c,d) for steps 48 to 63
- *
- * @v v MD5 variables
- * @ret f f(b,c,d)
- */
-static uint32_t md5_f_48_63 ( struct md5_variables *v ) {
- return ( v->c ^ ( v->b | (~v->d) ) );
-}
-
-/** An MD5 step function */
-struct md5_step {
- /**
- * Calculate f(b,c,d)
- *
- * @v v MD5 variables
- * @ret f f(b,c,d)
- */
- uint32_t ( * f ) ( struct md5_variables *v );
- /** Coefficient of i in g=ni+m */
- uint8_t coefficient;
- /** Constant term in g=ni+m */
- uint8_t constant;
-};
-
-/** MD5 steps */
-static struct md5_step md5_steps[4] = {
- /** 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 },
-};
-
-/**
- * Initialise MD5 algorithm
- *
- * @v ctx MD5 context
- */
-static void md5_init ( void *ctx ) {
- struct md5_context *context = ctx;
-
- context->ddd.dd.digest.h[0] = cpu_to_le32 ( 0x67452301 );
- context->ddd.dd.digest.h[1] = cpu_to_le32 ( 0xefcdab89 );
- context->ddd.dd.digest.h[2] = cpu_to_le32 ( 0x98badcfe );
- context->ddd.dd.digest.h[3] = cpu_to_le32 ( 0x10325476 );
- context->len = 0;
-}
-
-/**
- * Calculate MD5 digest of accumulated data
- *
- * @v context MD5 context
- */
-static void md5_digest ( struct md5_context *context ) {
- union {
- union md5_digest_data_dwords ddd;
- struct md5_variables v;
- } u;
- uint32_t *a = &u.v.a;
- uint32_t *b = &u.v.b;
- uint32_t *c = &u.v.c;
- uint32_t *d = &u.v.d;
- uint32_t *w = u.v.w;
- uint32_t f;
- uint32_t g;
- uint32_t temp;
- struct md5_step *step;
- unsigned int i;
-
- /* Sanity checks */
- assert ( ( context->len % sizeof ( context->ddd.dd.data ) ) == 0 );
- linker_assert ( &u.ddd.dd.digest.h[0] == a, md5_bad_layout );
- linker_assert ( &u.ddd.dd.digest.h[1] == b, md5_bad_layout );
- linker_assert ( &u.ddd.dd.digest.h[2] == c, md5_bad_layout );
- linker_assert ( &u.ddd.dd.digest.h[3] == d, md5_bad_layout );
- linker_assert ( &u.ddd.dd.data.dword[0] == w, md5_bad_layout );
-
- DBGC ( context, "MD5 digesting:\n" );
- DBGC_HDA ( context, 0, &context->ddd.dd.digest,
- sizeof ( context->ddd.dd.digest ) );
- DBGC_HDA ( context, context->len, &context->ddd.dd.data,
- sizeof ( context->ddd.dd.data ) );
-
- /* Convert h[0..3] to host-endian, and initialise a, b, c, d,
- * and w[0..15]
- */
- for ( i = 0 ; i < ( sizeof ( u.ddd.dword ) /
- sizeof ( u.ddd.dword[0] ) ) ; i++ ) {
- le32_to_cpus ( &context->ddd.dword[i] );
- u.ddd.dword[i] = context->ddd.dword[i];
- }
-
- /* Main loop */
- for ( i = 0 ; i < 64 ; i++ ) {
- step = &md5_steps[ i / 16 ];
- f = step->f ( &u.v );
- g = ( ( ( step->coefficient * i ) + step->constant ) % 16 );
- temp = *d;
- *d = *c;
- *c = *b;
- *b = ( *b + rol32 ( ( *a + f + k[i] + w[g] ), r[i] ) );
- *a = temp;
- DBGC2 ( context, "%2d : %08x %08x %08x %08x\n",
- i, *a, *b, *c, *d );
- }
-
- /* Add chunk to hash and convert back to big-endian */
- for ( i = 0 ; i < 4 ; i++ ) {
- context->ddd.dd.digest.h[i] =
- cpu_to_le32 ( context->ddd.dd.digest.h[i] +
- u.ddd.dd.digest.h[i] );
- }
-
- DBGC ( context, "MD5 digested:\n" );
- DBGC_HDA ( context, 0, &context->ddd.dd.digest,
- sizeof ( context->ddd.dd.digest ) );
-}
-
-/**
- * Accumulate data with MD5 algorithm
- *
- * @v ctx MD5 context
- * @v data Data
- * @v len Length of data
- */
-static void md5_update ( void *ctx, const void *data, size_t len ) {
- struct md5_context *context = ctx;
- const uint8_t *byte = data;
- size_t offset;
-
- /* Accumulate data a byte at a time, performing the digest
- * whenever we fill the data buffer
- */
- while ( len-- ) {
- offset = ( context->len % sizeof ( context->ddd.dd.data ) );
- context->ddd.dd.data.byte[offset] = *(byte++);
- context->len++;
- if ( ( context->len % sizeof ( context->ddd.dd.data ) ) == 0 )
- md5_digest ( context );
- }
-}
-
-/**
- * Generate MD5 digest
- *
- * @v ctx MD5 context
- * @v out Output buffer
- */
-static void md5_final ( void *ctx, void *out ) {
- struct md5_context *context = ctx;
- uint64_t len_bits;
- uint8_t pad;
-
- /* Record length before pre-processing */
- len_bits = cpu_to_le64 ( ( ( uint64_t ) context->len ) * 8 );
-
- /* Pad with a single "1" bit followed by as many "0" bits as required */
- pad = 0x80;
- do {
- md5_update ( ctx, &pad, sizeof ( pad ) );
- pad = 0x00;
- } while ( ( context->len % sizeof ( context->ddd.dd.data ) ) !=
- offsetof ( typeof ( context->ddd.dd.data ), final.len ) );
-
- /* Append length (in bits) */
- md5_update ( ctx, &len_bits, sizeof ( len_bits ) );
- assert ( ( context->len % sizeof ( context->ddd.dd.data ) ) == 0 );
-
- /* Copy out final digest */
- memcpy ( out, &context->ddd.dd.digest,
- sizeof ( context->ddd.dd.digest ) );
-}
-
-/** MD5 algorithm */
-struct digest_algorithm md5_algorithm = {
- .name = "md5",
- .ctxsize = sizeof ( struct md5_context ),
- .blocksize = sizeof ( union md5_block ),
- .digestsize = sizeof ( struct md5_digest ),
- .init = md5_init,
- .update = md5_update,
- .final = md5_final,
-};
-
-/** "md5" object identifier */
-static uint8_t oid_md5[] = { ASN1_OID_MD5 };
-
-/** "md5" OID-identified algorithm */
-struct asn1_algorithm oid_md5_algorithm __asn1_algorithm = {
- .name = "md5",
- .digest = &md5_algorithm,
- .oid = ASN1_OID_CURSOR ( oid_md5 ),
-};