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From dee50138f4431550598762e781b7e1524da05fd4 Mon Sep 17 00:00:00 2001
From: Paul Barker <pa...@paulbarker.me.uk>
Date: Sat, 24 Oct 2015 20:15:17 +0100
Subject: [PATCH 1/3] md5: Add md5_to_string function
Signed-off-by: Paul Barker <pa...@paulbarker.me.uk>
---
libopkg/file_util.c | 28 +++-------------------------
libopkg/md5.c | 17 +++++++++++++++++
libopkg/md5.h | 3 +++
3 files changed, 23 insertions(+), 25 deletions(-)
diff --git a/libopkg/file_util.c b/libopkg/file_util.c
index 5eff469..cb3dbf0 100644
--- a/libopkg/file_util.c
+++ b/libopkg/file_util.c
@@ -349,27 +349,13 @@ int file_mkdir_hier(const char *path, long mode)
char *file_md5sum_alloc(const char *file_name)
{
- static const int md5sum_bin_len = 16;
- static const int md5sum_hex_len = 32;
-
- static const unsigned char bin2hex[16] = {
- '0', '1', '2', '3',
- '4', '5', '6', '7',
- '8', '9', 'a', 'b',
- 'c', 'd', 'e', 'f'
- };
-
- int i, err;
+ int err;
FILE *file;
- char *md5sum_hex;
- unsigned char md5sum_bin[md5sum_bin_len];
-
- md5sum_hex = xcalloc(1, md5sum_hex_len + 1);
+ unsigned char md5sum_bin[16];
file = fopen(file_name, "r");
if (file == NULL) {
opkg_perror(ERROR, "Failed to open file %s", file_name);
- free(md5sum_hex);
return NULL;
}
@@ -377,20 +363,12 @@ char *file_md5sum_alloc(const char *file_name)
if (err) {
opkg_msg(ERROR, "Could't compute md5sum for %s.\n", file_name);
fclose(file);
- free(md5sum_hex);
return NULL;
}
fclose(file);
- for (i = 0; i < md5sum_bin_len; i++) {
- md5sum_hex[i * 2] = bin2hex[md5sum_bin[i] >> 4];
- md5sum_hex[i * 2 + 1] = bin2hex[md5sum_bin[i] & 0xf];
- }
-
- md5sum_hex[md5sum_hex_len] = '\0';
-
- return md5sum_hex;
+ return md5_to_string(md5sum_bin);
}
#ifdef HAVE_SHA256
diff --git a/libopkg/md5.c b/libopkg/md5.c
index d476b8b..7138681 100644
--- a/libopkg/md5.c
+++ b/libopkg/md5.c
@@ -30,6 +30,8 @@
#include <string.h>
#include <sys/types.h>
+#include "xfuncs.h"
+
#if USE_UNLOCKED_IO
#include "unlocked-io.h"
#endif
@@ -431,3 +433,18 @@ void md5_process_block(const void *buffer, size_t len, struct md5_ctx *ctx)
ctx->C = C;
ctx->D = D;
}
+
+char *md5_to_string(const void *md5sum_bin)
+{
+ int i;
+ const char *src = (const char *)md5sum_bin;
+ char *buf = xmalloc(33);
+
+ /* Print 4 bytes at a time. */
+ for (i = 0; i < 16; i += 4) {
+ sprintf(&buf[2*i], "%02hhx%02hhx%02hhx%02hhx",
+ src[i], src[i+1], src[i+2], src[i+3]);
+ }
+
+ return buf;
+}
diff --git a/libopkg/md5.h b/libopkg/md5.h
index 01320f5..2a7274d 100644
--- a/libopkg/md5.h
+++ b/libopkg/md5.h
@@ -118,6 +118,9 @@ extern int __md5_stream(FILE * stream, void *resblock) __THROW;
extern void *__md5_buffer(const char *buffer, size_t len,
void *resblock) __THROW;
+/* Convert a binary md5sum value to an ASCII string. */
+char *md5_to_string(const void *md5sum_bin);
+
#ifdef __cplusplus
}
#endif
--
2.6.1
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