openwrt-xburst/package/busybox/patches/913-libbb_hash.patch

#
# expose (again) an hash_fd function (used 911-ipkg.patch)
#
diff -ruN busybox-1.1.1-old/coreutils/md5_sha1_sum.c busybox-1.1.1-new/coreutils/md5_sha1_sum.c
--- busybox-1.1.1-old/coreutils/md5_sha1_sum.c	2006-03-30 00:14:50.000000000 +0200
+++ busybox-1.1.1-new/coreutils/md5_sha1_sum.c	2006-03-29 23:46:51.000000000 +0200
@@ -15,80 +15,10 @@
 
 #include "busybox.h"
 
-typedef enum { HASH_SHA1, HASH_MD5 } hash_algo_t;
-
 #define FLAG_SILENT	1
 #define FLAG_CHECK	2
 #define FLAG_WARN	4
 
-/* This might be useful elsewhere */
-static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
-									  unsigned char hash_length)
-{
-	int x, len, max;
-	unsigned char *hex_value;
-
-	max = (hash_length * 2) + 2;
-	hex_value = xmalloc(max);
-	for (x = len = 0; x < hash_length; x++) {
-		len += snprintf((char*)(hex_value + len), max - len, "%02x", hash_value[x]);
-	}
-	return (hex_value);
-}
-
-static uint8_t *hash_file(const char *filename, hash_algo_t hash_algo)
-{
-	int src_fd, hash_len, count;
-	union _ctx_ {
-		sha1_ctx_t sha1;
-		md5_ctx_t md5;
-	} context;
-	uint8_t *hash_value = NULL;
-	RESERVE_CONFIG_UBUFFER(in_buf, 4096);
-	void (*update)(const void*, size_t, void*);
-	void (*final)(void*, void*);
-	
-	if(strcmp(filename, "-") == 0) {
-		src_fd = STDIN_FILENO;
-	} else if(0 > (src_fd = open(filename, O_RDONLY))) {
-		bb_perror_msg("%s", filename);
-		return NULL;
-	}
-
-	// figure specific hash algorithims
-	if(ENABLE_MD5SUM && hash_algo==HASH_MD5) {
-		md5_begin(&context.md5);
-		update = (void (*)(const void*, size_t, void*))md5_hash;
-		final = (void (*)(void*, void*))md5_end;
-		hash_len = 16;
-	} else if(ENABLE_SHA1SUM && hash_algo==HASH_SHA1) {
-		sha1_begin(&context.sha1);
-		update = (void (*)(const void*, size_t, void*))sha1_hash;
-		final = (void (*)(void*, void*))sha1_end;
-		hash_len = 20;
-	} else {
-		bb_error_msg_and_die("algotithm not supported");
-	}
-	
-
-	while(0 < (count = read(src_fd, in_buf, sizeof in_buf))) {
-		update(in_buf, count, &context);
-	}
-
-	if(count == 0) {
-		final(in_buf, &context);
-		hash_value = hash_bin_to_hex(in_buf, hash_len);
-	}
-	
-	RELEASE_CONFIG_BUFFER(in_buf);
-	
-	if(src_fd != STDIN_FILENO) {
-		close(src_fd);
-	}
-	
-	return hash_value;
-}
-
 /* This could become a common function for md5 as well, by using md5_stream */
 static int hash_files(int argc, char **argv, hash_algo_t hash_algo)
 {
diff -ruN busybox-1.1.1-old/include/libbb.h busybox-1.1.1-new/include/libbb.h
--- busybox-1.1.1-old/include/libbb.h	2006-03-30 00:14:50.000000000 +0200
+++ busybox-1.1.1-new/include/libbb.h	2006-03-30 00:31:48.000000000 +0200
@@ -490,6 +490,12 @@
 void md5_hash(const void *data, size_t length, md5_ctx_t *ctx);
 void *md5_end(void *resbuf, md5_ctx_t *ctx);
 
+typedef enum { HASH_SHA1, HASH_MD5 } hash_algo_t;
+
+unsigned char *hash_bin_to_hex(unsigned char *hash_value, unsigned char hash_length);
+int hash_fd(int fd, hash_algo_t hash_algo, uint8_t *hash_value);
+uint8_t *hash_file(const char *filename, hash_algo_t hash_algo);
+
 /* busybox.h will include dmalloc later for us, else include it here.  */
 #if !defined _BB_INTERNAL_H_ && defined DMALLOC
 #include <dmalloc.h>
diff -ruN busybox-1.1.1-old/libbb/Makefile.in busybox-1.1.1-new/libbb/Makefile.in
--- busybox-1.1.1-old/libbb/Makefile.in	2006-03-30 00:14:50.000000000 +0200
+++ busybox-1.1.1-new/libbb/Makefile.in	2006-03-29 23:46:51.000000000 +0200
@@ -11,6 +11,7 @@
 
 LIBBB-n:=
 LIBBB-y:= \
+	hash.c \
 	bb_asprintf.c ask_confirmation.c change_identity.c chomp.c \
 	compare_string_array.c concat_path_file.c copy_file.c copyfd.c \
 	create_icmp_socket.c create_icmp6_socket.c \
diff -ruN busybox-1.1.1-old/libbb/hash.c busybox-1.1.1-new/libbb/hash.c
--- busybox-1.1.1-old/libbb/hash.c	1970-01-01 01:00:00.000000000 +0100
+++ busybox-1.1.1-new/libbb/hash.c	2006-03-30 00:35:54.000000000 +0200
@@ -0,0 +1,100 @@
+/*
+ *  Copyright (C) 2003 Glenn L. McGrath
+ *  Copyright (C) 2003-2004 Erik Andersen
+ *
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ */
+
+#include <fcntl.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "busybox.h"
+
+unsigned char *hash_bin_to_hex(unsigned char *hash_value, unsigned char hash_length)
+{
+	int x, len, max;
+	unsigned char *hex_value;
+
+	max = (hash_length * 2) + 2;
+	hex_value = xmalloc(max);
+	for (x = len = 0; x < hash_length; x++) {
+		len += snprintf((char*)(hex_value + len), max - len, "%02x", hash_value[x]);
+	}
+	return (hex_value);
+}
+
+int hash_fd(int fd, hash_algo_t hash_algo, uint8_t *hash_value)
+{
+	int count, result = 0;
+	union _ctx_ {
+		sha1_ctx_t sha1;
+		md5_ctx_t md5;
+	} context;
+	RESERVE_CONFIG_UBUFFER(in_buf, 4096);
+	void (*update)(const void*, size_t, void*) = NULL;
+	void (*final)(void*, void*) = NULL;
+	
+	// figure specific hash algorithims
+	if(hash_algo==HASH_MD5) {
+		md5_begin(&context.md5);
+		update = (void (*)(const void*, size_t, void*))md5_hash;
+		final = (void (*)(void*, void*))md5_end;
+	} else if(hash_algo==HASH_SHA1) {
+		sha1_begin(&context.sha1);
+		update = (void (*)(const void*, size_t, void*))sha1_hash;
+		final = (void (*)(void*, void*))sha1_end;
+	}
+
+
+	while(0 < (count = read(fd, in_buf, sizeof in_buf))) {
+		update(in_buf, count, &context);
+		result += count;
+	}
+
+	if(count == 0) {
+		final(hash_value, &context);
+	}
+	
+	RELEASE_CONFIG_BUFFER(in_buf);
+	
+	return result;
+}
+
+uint8_t *hash_file(const char *filename, hash_algo_t hash_algo)
+{
+	int src_fd, hash_len;
+	RESERVE_CONFIG_UBUFFER(hash_buf, 20);
+	uint8_t *hash_value = NULL;
+	
+	if(ENABLE_MD5SUM && hash_algo==HASH_MD5) {
+		hash_len = 16;
+	} else if(ENABLE_SHA1SUM && hash_algo==HASH_SHA1) {
+		hash_len = 20;
+	} else {
+		bb_error_msg_and_die("algotithm not supported");
+	}
+
+	if(strcmp(filename, "-") == 0) {
+		src_fd = STDIN_FILENO;
+	} else if(0 > (src_fd = open(filename, O_RDONLY))) {
+		bb_perror_msg("%s", filename);
+		return NULL;
+	}
+
+	if(hash_fd(src_fd, hash_algo, hash_buf) > 0) {
+		hash_value = hash_bin_to_hex(hash_buf, hash_len);
+	}
+	
+	if(src_fd != STDIN_FILENO) {
+		close(src_fd);
+	}
+	
+	RELEASE_CONFIG_BUFFER(hash_buf);
+
+	return hash_value;
+}