ref: f03b898250597680f115cec5cec06953b403acf9
parent: f12e42ab6d41740a6e9302f1f12250a0f72c3f9d
author: yenatch <yenatch@gmail.com>
date: Sat Jun 24 14:34:25 EDT 2017
Add a md5 tool to avoid md5sum dependency. md5sum is missing in macOS and (presumably) BSD. An alternative would have been to use sha1sum instead, but it's probably a good idea to have as few dependencies as possible, so this doesn't happen again. fixes #364
--- a/Makefile
+++ b/Makefile
@@ -62,11 +62,11 @@
rgbfix -Cjv -i BYTE -k 01 -l 0x33 -m 0x10 -p 0 -r 3 -t PM_CRYSTAL $@
-# For files that the compressor can't match, there will be a .lz file suffixed with the hash of the correct uncompressed file.
+# For files that the compressor can't match, there will be a .lz file suffixed with the md5 hash of the correct uncompressed file.
# If the hash of the uncompressed file matches, use this .lz instead.
# This allows pngs to be used for compressed graphics and still match.
-%.lz: hash = $(shell md5sum $(*D)/$(*F) | sed "s/\(.\{8\}\).*/\1/")+%.lz: hash = $(shell tools/md5 $(*D)/$(*F) | sed "s/\(.\{8\}\).*/\1/")%.lz: %
$(eval filename := $@.$(hash))
$(if $(wildcard $(filename)),cp $(filename) $@,tools/lzcomp $< $@)
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -9,7 +9,8 @@
palette \
pokemon_animation \
pokemon_animation_graphics \
- gfx
+ gfx \
+ md5
@:
%: %.c
--- /dev/null
+++ b/tools/md5.c
@@ -1,0 +1,127 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "common.h"
+
+static const int s[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,
+};
+
+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,
+};
+
+#define rotate_left_32(value, by) \
+ ((((value) << (by)) & 0xffffffff) | ((value) >> 32 - (by)))
+
+void md5_wikipedia(uint8_t *data, int length, uint8_t *result) {+
+ uint8_t *message = calloc(length + 64, sizeof(uint8_t));
+ memcpy(message, data, length);
+
+ long orig_bitlength = length * 8;
+
+ message[length++] |= 1 << 7;
+
+ while (length % 64 != (64 - 8)) {+ length++;
+ }
+ for (int i = 0; i < 8; i++) {+ message[length++] = (orig_bitlength >> (i * 8)) & 0xff;
+ }
+
+ int a0 = 0x67452301;
+ int b0 = 0xefcdab89;
+ int c0 = 0x98badcfe;
+ int d0 = 0x10325476;
+
+ for (int start = 0; start < length; start += 64) {+ uint32_t M[16];
+ for (int j = 0; j < 16; j++) {+ uint8_t *word = &message[start + j * 4];
+ M[j] = *word++;
+ M[j] |= *word++ << 8;
+ M[j] |= *word++ << 16;
+ M[j] |= *word++ << 24;
+ }
+
+ int A = a0;
+ int B = b0;
+ int C = c0;
+ int D = d0;
+ for (int i = 0; i < 64; i++) {+ int F, g;
+ switch (i / 16) {+ case 0:
+ F = (B & C) | (~B & D);
+ g = i;
+ break;
+ case 1:
+ F = (D & B) | (~D & C);
+ g = (5 * i + 1) % 16;
+ break;
+ case 2:
+ F = B ^ C ^ D;
+ g = (3 * i + 5) % 16;
+ break;
+ case 3:
+ F = C ^ (B | ~D);
+ g = (7 * i) % 16;
+ break;
+ }
+ int e = D;
+ D = C;
+ C = B;
+ B = B + rotate_left_32(A + F + K[i] + M[g], s[i]);
+ A = e;
+ }
+ a0 += A;
+ b0 += B;
+ c0 += C;
+ d0 += D;
+ }
+
+ int values[] = {a0, b0, c0, d0};+ for (int i = 0; i < 16; i++) {+ int value = values[i >> 2];
+ int shift = (i % 4) * 8;
+ result[i] = (value >> shift) & 0xff;
+ }
+
+ free(message);
+}
+
+int main(int argc, char *argv[]) {+ if (argc < 2) {+ exit(1);
+ }
+ char *infile = argv[1];
+ int size;
+ uint8_t *data = read_u8(infile, &size);
+
+ uint8_t result[16];
+ md5_wikipedia(data, size, result);
+ for (int i = 0; i < 16; i++) {+ printf("%02x", result[i]);+ }
+ printf("\n");+}