1 files changed, 298 insertions, 0 deletions

diff --git a/qemu/roms/ipxe/src/crypto/md5.c b/qemu/roms/ipxe/src/crypto/md5.c
new file mode 100644
index 000000000..122c7d59e
--- /dev/null
+++ b/qemu/roms/ipxe/src/crypto/md5.c
@@ -0,0 +1,298 @@
+/*
+ * 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.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+/** @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 ),
+};