mirror of https://github.com/inolen/redream.git
Validate bootrom on startup
This commit is contained in:
joseph
Anthony Pesch
parent
006813063e
commit
c01c6a1077
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@ -151,6 +151,7 @@ set(REDREAM_SOURCES
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src/core/interval_tree.c
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src/core/list.c
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src/core/log.c
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src/core/md5.c
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src/core/option.c
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src/core/profiler.cc
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src/core/ringbuf.cc
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@ -0,0 +1,320 @@
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/*
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* This is an OpenSSL-compatible implementation of the RSA Data Security, Inc.
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* MD5 Message-Digest Algorithm (RFC 1321).
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*
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* Homepage:
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* http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5
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*
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* Author:
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* Alexander Peslyak, better known as Solar Designer <solar at openwall.com>
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*
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* This software was written by Alexander Peslyak in 2001. No copyright is
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* claimed, and the software is hereby placed in the public domain.
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* In case this attempt to disclaim copyright and place the software in the
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* public domain is deemed null and void, then the software is
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* Copyright (c) 2001 Alexander Peslyak and it is hereby released to the
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* general public under the following terms:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted.
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*
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* There's ABSOLUTELY NO WARRANTY, express or implied.
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*
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* (This is a heavily cut-down "BSD license".)
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*
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* This differs from Colin Plumb's older public domain implementation in that
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* no exactly 32-bit integer data type is required (any 32-bit or wider
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* unsigned integer data type will do), there's no compile-time endianness
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* configuration, and the function prototypes match OpenSSL's. No code from
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* Colin Plumb's implementation has been reused; this comment merely compares
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* the properties of the two independent implementations.
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*
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* The primary goals of this implementation are portability and ease of use.
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* It is meant to be fast, but not as fast as possible. Some known
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* optimizations are not included to reduce source code size and avoid
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* compile-time configuration.
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*/
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#ifndef HAVE_OPENSSL
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#include <string.h>
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#include "md5.h"
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/*
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* The basic MD5 functions.
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*
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* F and G are optimized compared to their RFC 1321 definitions for
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* architectures that lack an AND-NOT instruction, just like in Colin Plumb's
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* implementation.
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*/
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#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
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#define G(x, y, z) ((y) ^ ((z) & ((x) ^ (y))))
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#define H(x, y, z) ((x) ^ (y) ^ (z))
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#define I(x, y, z) ((y) ^ ((x) | ~(z)))
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/*
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* The MD5 transformation for all four rounds.
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*/
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#define STEP(f, a, b, c, d, x, t, s) \
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(a) += f((b), (c), (d)) + (x) + (t); \
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(a) = (((a) << (s)) | (((a) & 0xffffffff) >> (32 - (s)))); \
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(a) += (b);
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/*
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* SET reads 4 input bytes in little-endian byte order and stores them
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* in a properly aligned word in host byte order.
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*
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* The check for little-endian architectures that tolerate unaligned
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* memory accesses is just an optimization. Nothing will break if it
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* doesn't work.
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*/
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#if defined(__i386__) || defined(__x86_64__) || defined(__vax__)
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#define SET(n) \
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(*(MD5_u32plus *)&ptr[(n) * 4])
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#define GET(n) \
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SET(n)
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#else
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#define SET(n) \
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(ctx->block[(n)] = \
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(MD5_u32plus)ptr[(n) * 4] | \
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((MD5_u32plus)ptr[(n) * 4 + 1] << 8) | \
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((MD5_u32plus)ptr[(n) * 4 + 2] << 16) | \
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((MD5_u32plus)ptr[(n) * 4 + 3] << 24))
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#define GET(n) \
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(ctx->block[(n)])
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#endif
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/*
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* This processes one or more 64-byte data blocks, but does NOT update
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* the bit counters. There are no alignment requirements.
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*/
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static void *body(MD5_CTX *ctx, void *data, unsigned long size)
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{
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unsigned char *ptr;
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MD5_u32plus a, b, c, d;
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MD5_u32plus saved_a, saved_b, saved_c, saved_d;
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ptr = data;
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a = ctx->a;
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b = ctx->b;
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c = ctx->c;
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d = ctx->d;
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do {
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saved_a = a;
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saved_b = b;
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saved_c = c;
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saved_d = d;
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/* Round 1 */
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STEP(F, a, b, c, d, SET(0), 0xd76aa478, 7)
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STEP(F, d, a, b, c, SET(1), 0xe8c7b756, 12)
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STEP(F, c, d, a, b, SET(2), 0x242070db, 17)
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STEP(F, b, c, d, a, SET(3), 0xc1bdceee, 22)
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STEP(F, a, b, c, d, SET(4), 0xf57c0faf, 7)
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STEP(F, d, a, b, c, SET(5), 0x4787c62a, 12)
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STEP(F, c, d, a, b, SET(6), 0xa8304613, 17)
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STEP(F, b, c, d, a, SET(7), 0xfd469501, 22)
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STEP(F, a, b, c, d, SET(8), 0x698098d8, 7)
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STEP(F, d, a, b, c, SET(9), 0x8b44f7af, 12)
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STEP(F, c, d, a, b, SET(10), 0xffff5bb1, 17)
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STEP(F, b, c, d, a, SET(11), 0x895cd7be, 22)
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STEP(F, a, b, c, d, SET(12), 0x6b901122, 7)
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STEP(F, d, a, b, c, SET(13), 0xfd987193, 12)
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STEP(F, c, d, a, b, SET(14), 0xa679438e, 17)
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STEP(F, b, c, d, a, SET(15), 0x49b40821, 22)
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/* Round 2 */
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STEP(G, a, b, c, d, GET(1), 0xf61e2562, 5)
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STEP(G, d, a, b, c, GET(6), 0xc040b340, 9)
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STEP(G, c, d, a, b, GET(11), 0x265e5a51, 14)
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STEP(G, b, c, d, a, GET(0), 0xe9b6c7aa, 20)
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STEP(G, a, b, c, d, GET(5), 0xd62f105d, 5)
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STEP(G, d, a, b, c, GET(10), 0x02441453, 9)
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STEP(G, c, d, a, b, GET(15), 0xd8a1e681, 14)
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STEP(G, b, c, d, a, GET(4), 0xe7d3fbc8, 20)
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STEP(G, a, b, c, d, GET(9), 0x21e1cde6, 5)
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STEP(G, d, a, b, c, GET(14), 0xc33707d6, 9)
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STEP(G, c, d, a, b, GET(3), 0xf4d50d87, 14)
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STEP(G, b, c, d, a, GET(8), 0x455a14ed, 20)
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STEP(G, a, b, c, d, GET(13), 0xa9e3e905, 5)
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STEP(G, d, a, b, c, GET(2), 0xfcefa3f8, 9)
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STEP(G, c, d, a, b, GET(7), 0x676f02d9, 14)
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STEP(G, b, c, d, a, GET(12), 0x8d2a4c8a, 20)
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/* Round 3 */
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STEP(H, a, b, c, d, GET(5), 0xfffa3942, 4)
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STEP(H, d, a, b, c, GET(8), 0x8771f681, 11)
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STEP(H, c, d, a, b, GET(11), 0x6d9d6122, 16)
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STEP(H, b, c, d, a, GET(14), 0xfde5380c, 23)
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STEP(H, a, b, c, d, GET(1), 0xa4beea44, 4)
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STEP(H, d, a, b, c, GET(4), 0x4bdecfa9, 11)
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STEP(H, c, d, a, b, GET(7), 0xf6bb4b60, 16)
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STEP(H, b, c, d, a, GET(10), 0xbebfbc70, 23)
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STEP(H, a, b, c, d, GET(13), 0x289b7ec6, 4)
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STEP(H, d, a, b, c, GET(0), 0xeaa127fa, 11)
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STEP(H, c, d, a, b, GET(3), 0xd4ef3085, 16)
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STEP(H, b, c, d, a, GET(6), 0x04881d05, 23)
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STEP(H, a, b, c, d, GET(9), 0xd9d4d039, 4)
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STEP(H, d, a, b, c, GET(12), 0xe6db99e5, 11)
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STEP(H, c, d, a, b, GET(15), 0x1fa27cf8, 16)
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STEP(H, b, c, d, a, GET(2), 0xc4ac5665, 23)
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/* Round 4 */
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STEP(I, a, b, c, d, GET(0), 0xf4292244, 6)
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STEP(I, d, a, b, c, GET(7), 0x432aff97, 10)
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STEP(I, c, d, a, b, GET(14), 0xab9423a7, 15)
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STEP(I, b, c, d, a, GET(5), 0xfc93a039, 21)
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STEP(I, a, b, c, d, GET(12), 0x655b59c3, 6)
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STEP(I, d, a, b, c, GET(3), 0x8f0ccc92, 10)
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STEP(I, c, d, a, b, GET(10), 0xffeff47d, 15)
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STEP(I, b, c, d, a, GET(1), 0x85845dd1, 21)
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STEP(I, a, b, c, d, GET(8), 0x6fa87e4f, 6)
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STEP(I, d, a, b, c, GET(15), 0xfe2ce6e0, 10)
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STEP(I, c, d, a, b, GET(6), 0xa3014314, 15)
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STEP(I, b, c, d, a, GET(13), 0x4e0811a1, 21)
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STEP(I, a, b, c, d, GET(4), 0xf7537e82, 6)
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STEP(I, d, a, b, c, GET(11), 0xbd3af235, 10)
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STEP(I, c, d, a, b, GET(2), 0x2ad7d2bb, 15)
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STEP(I, b, c, d, a, GET(9), 0xeb86d391, 21)
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a += saved_a;
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b += saved_b;
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c += saved_c;
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d += saved_d;
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ptr += 64;
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} while (size -= 64);
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ctx->a = a;
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ctx->b = b;
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ctx->c = c;
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ctx->d = d;
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return ptr;
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}
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void MD5_Init(MD5_CTX *ctx)
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{
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ctx->a = 0x67452301;
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ctx->b = 0xefcdab89;
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ctx->c = 0x98badcfe;
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ctx->d = 0x10325476;
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ctx->lo = 0;
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ctx->hi = 0;
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}
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void MD5_Update(MD5_CTX *ctx, void *data, unsigned long size)
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{
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MD5_u32plus saved_lo;
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unsigned long used, free;
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saved_lo = ctx->lo;
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if ((ctx->lo = (saved_lo + size) & 0x1fffffff) < saved_lo)
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ctx->hi++;
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ctx->hi += size >> 29;
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used = saved_lo & 0x3f;
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if (used) {
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free = 64 - used;
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if (size < free) {
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memcpy(&ctx->buffer[used], data, size);
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return;
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}
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memcpy(&ctx->buffer[used], data, free);
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data = (unsigned char *)data + free;
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size -= free;
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body(ctx, ctx->buffer, 64);
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}
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if (size >= 64) {
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data = body(ctx, data, size & ~(unsigned long)0x3f);
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size &= 0x3f;
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}
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memcpy(ctx->buffer, data, size);
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}
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void MD5_Final(char *result, MD5_CTX *ctx)
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{
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unsigned long used, free;
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used = ctx->lo & 0x3f;
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ctx->buffer[used++] = 0x80;
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free = 64 - used;
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if (free < 8) {
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memset(&ctx->buffer[used], 0, free);
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body(ctx, ctx->buffer, 64);
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used = 0;
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free = 64;
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}
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memset(&ctx->buffer[used], 0, free - 8);
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ctx->lo <<= 3;
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ctx->buffer[56] = ctx->lo;
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ctx->buffer[57] = ctx->lo >> 8;
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ctx->buffer[58] = ctx->lo >> 16;
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ctx->buffer[59] = ctx->lo >> 24;
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ctx->buffer[60] = ctx->hi;
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ctx->buffer[61] = ctx->hi >> 8;
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ctx->buffer[62] = ctx->hi >> 16;
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ctx->buffer[63] = ctx->hi >> 24;
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body(ctx, ctx->buffer, 64);
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result[0] = (ctx->a & 0x000000f0) >> 4;
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result[1] = ctx->a & 0x0000000f;
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result[2] = (ctx->a & 0x0000f000) >> 12;
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result[3] = (ctx->a & 0x00000f00) >> 8;
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result[4] = (ctx->a & 0x00f00000) >> 20;
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result[5] = (ctx->a & 0x000f0000) >> 16;
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result[6] = (ctx->a & 0xf0000000) >> 28;
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result[7] = (ctx->a & 0x0f000000) >> 24;
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result[8] = (ctx->b & 0x000000f0) >> 4;
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result[9] = ctx->b & 0x0000000f;
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result[10] = (ctx->b & 0x0000f000) >> 12;
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result[11] = (ctx->b & 0x00000f00) >> 8;
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result[12] = (ctx->b & 0x00f00000) >> 20;
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result[13] = (ctx->b & 0x000f0000) >> 16;
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result[14] = (ctx->b & 0xf0000000) >> 28;
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result[15] = (ctx->b & 0x0f000000) >> 24;
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result[16] = (ctx->c & 0x000000f0) >> 4;
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result[17] = ctx->c & 0x0000000f;
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result[18] = (ctx->c & 0x0000f000) >> 12;
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result[19] = (ctx->c & 0x00000f00) >> 8;
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result[20] = (ctx->c & 0x00f00000) >> 20;
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result[21] = (ctx->c & 0x000f0000) >> 16;
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result[22] = (ctx->c & 0xf0000000) >> 28;
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result[23] = (ctx->c & 0x0f000000) >> 24;
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result[24] = (ctx->d & 0x000000f0) >> 4;
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result[25] = ctx->d & 0x0000000f;
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result[26] = (ctx->d & 0x0000f000) >> 12;
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result[27] = (ctx->d & 0x00000f00) >> 8;
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result[28] = (ctx->d & 0x00f00000) >> 20;
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result[29] = (ctx->d & 0x000f0000) >> 16;
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result[30] = (ctx->d & 0xf0000000) >> 28;
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result[31] = (ctx->d & 0x0f000000) >> 24;
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/* convert result into a valid string */
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for(int i = 0; i < 32; ++i) {
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if(result[i] > 9 && result[i] < 16)
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result[i] += 87;
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else
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result[i] += 48;
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}
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result[32] = 0;
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memset(ctx, 0, sizeof(*ctx));
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}
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#endif
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@ -0,0 +1,45 @@
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/*
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* This is an OpenSSL-compatible implementation of the RSA Data Security, Inc.
|
||||
* MD5 Message-Digest Algorithm (RFC 1321).
|
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*
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* Homepage:
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* http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5
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*
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* Author:
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* Alexander Peslyak, better known as Solar Designer <solar at openwall.com>
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*
|
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* This software was written by Alexander Peslyak in 2001. No copyright is
|
||||
* claimed, and the software is hereby placed in the public domain.
|
||||
* In case this attempt to disclaim copyright and place the software in the
|
||||
* public domain is deemed null and void, then the software is
|
||||
* Copyright (c) 2001 Alexander Peslyak and it is hereby released to the
|
||||
* general public under the following terms:
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted.
|
||||
*
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* There's ABSOLUTELY NO WARRANTY, express or implied.
|
||||
*
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* See md5.c for more information.
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*/
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#ifdef HAVE_OPENSSL
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#include <openssl/md5.h>
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#elif !defined(_MD5_H)
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#define _MD5_H
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/* Any 32-bit or wider unsigned integer data type will do */
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typedef unsigned int MD5_u32plus;
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typedef struct {
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MD5_u32plus lo, hi;
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MD5_u32plus a, b, c, d;
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unsigned char buffer[64];
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MD5_u32plus block[16];
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} MD5_CTX;
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extern void MD5_Init(MD5_CTX *ctx);
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extern void MD5_Update(MD5_CTX *ctx, void *data, unsigned long size);
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extern void MD5_Final(char *result, MD5_CTX *ctx);
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#endif
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@ -1,5 +1,6 @@
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#include <stdio.h>
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#include "hw/rom/boot.h"
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#include "core/md5.h"
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#include "core/option.h"
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#include "hw/dreamcast.h"
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@ -7,6 +8,12 @@ DEFINE_OPTION_STRING(bios, "dc_boot.bin", "Path to boot rom");
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#define BIOS_SIZE 0x00200000
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/* Known valid bios md5's */
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#define BIOS_CHINESE_MD5 "a5c6a00818f97c5e3e91569ee22416dc"
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#define BIOS_JP_MD5 "37c921eb47532cae8fb70e5d987ce91c"
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#define BIOS_NO_MILCD_MD5 "f2cd29d09f3e29984bcea22ab2e006fe"
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#define BIOS_US_EU_MD5 "e10c53c2f8b90bab96ead2d368858623"
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struct boot {
|
||||
struct device;
|
||||
uint8_t rom[BIOS_SIZE];
|
||||
|
|
@ -22,6 +29,25 @@ static void boot_rom_write(struct boot *boot, uint32_t addr, uint32_t data,
|
|||
LOG_FATAL("Can't write to boot rom");
|
||||
}
|
||||
|
||||
static int boot_validate(struct boot *boot) {
|
||||
|
||||
/* Validate bootroom using md5 */
|
||||
MD5_CTX md5_ctx;
|
||||
MD5_Init(&md5_ctx);
|
||||
MD5_Update(&md5_ctx, boot->rom, BIOS_SIZE);
|
||||
char result[33];
|
||||
MD5_Final(result, &md5_ctx);
|
||||
|
||||
if(strcmp(result, BIOS_US_EU_MD5) == 0 ||
|
||||
strcmp(result, BIOS_NO_MILCD_MD5) == 0 ||
|
||||
strcmp(result, BIOS_JP_MD5) == 0 ||
|
||||
strcmp(result, BIOS_CHINESE_MD5) == 0)
|
||||
return 1;
|
||||
else
|
||||
return 0;
|
||||
|
||||
}
|
||||
|
||||
static int boot_load_rom(struct boot *boot, const char *path) {
|
||||
FILE *fp = fopen(path, "rb");
|
||||
if (!fp) {
|
||||
|
|
@ -42,6 +68,11 @@ static int boot_load_rom(struct boot *boot, const char *path) {
|
|||
CHECK_EQ(n, size);
|
||||
fclose(fp);
|
||||
|
||||
/* check for a valid bootrom */
|
||||
if(!boot_validate(boot))
|
||||
LOG_FATAL("Invalid BIOS file");
|
||||
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue