Revert "hashfile: replaced md5 with sha256"

This reverts commit 1a06687a.

util/hashfile.c

@@ -2,34 +2,34 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <fcntl.h>
-#include <libavutil/sha.h>
+#include <libavutil/md5.h>
 
 #include "../util.h"
 
 char *hashfile(char *path)
 {
-	struct AVSHA *ctx;
+	struct AVMD5 *ctx;
 	int i, fd;
 	char *ptr, *buf;
 	size_t len, size;
 	FILE *stream;
 	if ((fd = open(path, O_RDONLY)) < 0)
 		job_failed("Could not open file for hashing: %s", strerror(errno));
-	if (!(ctx = av_sha_alloc()))
+	if (!(ctx = av_md5_alloc()))
 		exit(99);
-	av_sha_init(ctx, 256);
+	av_md5_init(ctx);
 	buf = xmalloc(4096);
 	while ((len = read(fd, buf, 4096)) > 0)
-		av_sha_update(ctx, buf, len);
+		av_md5_update(ctx, buf, len);
 	if (len < 0)
 		job_failed("Could not read file for hashing: %s", strerror(errno));
 	close(fd);
-	av_sha_final(ctx, buf);
+	av_md5_final(ctx, buf);
 	av_free(ctx);
 	if (!(stream = open_memstream(&ptr, &size)))
 		exit(99);
-	fprintf(stream, "sha256:");
-	for (i = 0; i < 32; i ++)
+	fprintf(stream, "md5:");
+	for (i = 0; i < 16; i ++)
 		fprintf(stream, "%02hhx", buf[i]);
 	free(buf);
 	fclose(stream);