diff options
Diffstat (limited to 'qemu/roms/ipxe/src/crypto/md5.c')
-rw-r--r-- | qemu/roms/ipxe/src/crypto/md5.c | 302 |
1 files changed, 0 insertions, 302 deletions
diff --git a/qemu/roms/ipxe/src/crypto/md5.c b/qemu/roms/ipxe/src/crypto/md5.c deleted file mode 100644 index f9738b0ac..000000000 --- a/qemu/roms/ipxe/src/crypto/md5.c +++ /dev/null @@ -1,302 +0,0 @@ -/* - * 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 ), -}; |