X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=coreutils%2Fmd5_sha1_sum.c;h=53fd4d1a8bfc8c5ecfed9dcb1d2b435d0faae329;hb=d5ac9c88a7f620f6b775e404b145017827a10480;hp=d945ce7e03425b3fb6635b9646c8982485e6b369;hpb=a41fdf331af344ecd3ec230a072857ea197e1890;p=oweals%2Fbusybox.git

diff --git a/coreutils/md5_sha1_sum.c b/coreutils/md5_sha1_sum.c
index d945ce7e0..53fd4d1a8 100644
--- a/coreutils/md5_sha1_sum.c
+++ b/coreutils/md5_sha1_sum.c
@@ -3,16 +3,78 @@
  *  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.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
 
-#include "busybox.h"
-
-typedef enum { HASH_SHA1, HASH_MD5 } hash_algo_t;
-
-#define FLAG_SILENT	1
-#define FLAG_CHECK	2
-#define FLAG_WARN	4
+//usage:#define md5sum_trivial_usage
+//usage:       "[FILE]..."
+//usage:	IF_FEATURE_MD5_SHA1_SUM_CHECK("\n   or: md5sum -c [-sw] [FILE]")
+//usage:#define md5sum_full_usage "\n\n"
+//usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " MD5 checksums"
+//usage:	IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
+//usage:     "\n	-c	Check sums against given list"
+//usage:     "\n	-s	Don't output anything, status code shows success"
+//usage:     "\n	-w	Warn about improperly formatted checksum lines"
+//usage:	)
+//usage:
+//usage:#define md5sum_example_usage
+//usage:       "$ md5sum < busybox\n"
+//usage:       "6fd11e98b98a58f64ff3398d7b324003\n"
+//usage:       "$ md5sum busybox\n"
+//usage:       "6fd11e98b98a58f64ff3398d7b324003  busybox\n"
+//usage:       "$ md5sum -c -\n"
+//usage:       "6fd11e98b98a58f64ff3398d7b324003  busybox\n"
+//usage:       "busybox: OK\n"
+//usage:       "^D\n"
+//usage:
+//usage:#define sha1sum_trivial_usage
+//usage:       "[FILE]..."
+//usage:	IF_FEATURE_MD5_SHA1_SUM_CHECK("\n   or: sha1sum -c [-sw] [FILE]")
+//usage:#define sha1sum_full_usage "\n\n"
+//usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA1 checksums"
+//usage:	IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
+//usage:     "\n	-c	Check sums against given list"
+//usage:     "\n	-s	Don't output anything, status code shows success"
+//usage:     "\n	-w	Warn about improperly formatted checksum lines"
+//usage:	)
+//usage:
+//usage:#define sha256sum_trivial_usage
+//usage:       "[FILE]..."
+//usage:	IF_FEATURE_MD5_SHA1_SUM_CHECK("\n   or: sha256sum -c [-sw] [FILE]")
+//usage:#define sha256sum_full_usage "\n\n"
+//usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA256 checksums"
+//usage:	IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
+//usage:     "\n	-c	Check sums against given list"
+//usage:     "\n	-s	Don't output anything, status code shows success"
+//usage:     "\n	-w	Warn about improperly formatted checksum lines"
+//usage:	)
+//usage:
+//usage:#define sha512sum_trivial_usage
+//usage:       "[FILE]..."
+//usage:	IF_FEATURE_MD5_SHA1_SUM_CHECK("\n   or: sha512sum -c [-sw] [FILE]")
+//usage:#define sha512sum_full_usage "\n\n"
+//usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA512 checksums"
+//usage:	IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
+//usage:     "\n	-c	Check sums against given list"
+//usage:     "\n	-s	Don't output anything, status code shows success"
+//usage:     "\n	-w	Warn about improperly formatted checksum lines"
+//usage:	)
+
+#include "libbb.h"
+
+/* This is a NOEXEC applet. Be very careful! */
+
+enum {
+	/* 4th letter of applet_name is... */
+	HASH_MD5 = 's', /* "md5>s<um" */
+	HASH_SHA1 = '1',
+	HASH_SHA256 = '2',
+	HASH_SHA512 = '5',
+};
+
+#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,
@@ -21,56 +83,67 @@ static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
 	/* xzalloc zero-terminates */
 	char *hex_value = xzalloc((hash_length * 2) + 1);
 	bin2hex(hex_value, (char*)hash_value, hash_length);
-	return hex_value;
+	return (unsigned char *)hex_value;
 }
 
-static uint8_t *hash_file(const char *filename, hash_algo_t hash_algo)
+static uint8_t *hash_file(const char *filename)
 {
 	int src_fd, hash_len, count;
 	union _ctx_ {
+		sha512_ctx_t sha512;
+		sha256_ctx_t sha256;
 		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*);
-
-	src_fd = STDIN_FILENO;
-	if (NOT_LONE_DASH(filename)) {
-		src_fd = open(filename, O_RDONLY);
-		if (src_fd < 0) {
-			bb_perror_msg("%s", filename);
-			return NULL;
-		}
+	void FAST_FUNC (*update)(void*, const void*, size_t);
+	void FAST_FUNC (*final)(void*, void*);
+	char hash_algo;
+
+	src_fd = open_or_warn_stdin(filename);
+	if (src_fd < 0) {
+		return NULL;
 	}
 
-	/* figure specific hash algorithims */
-	if (ENABLE_MD5SUM && hash_algo==HASH_MD5) {
+	hash_algo = applet_name[3];
+
+	/* figure specific hash algorithms */
+	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;
+		update = (void*)md5_hash;
+		final = (void*)md5_end;
 		hash_len = 16;
-	} else if (ENABLE_SHA1SUM && hash_algo==HASH_SHA1) {
+	} 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;
+		update = (void*)sha1_hash;
+		final = (void*)sha1_end;
 		hash_len = 20;
+	} else if (ENABLE_SHA256SUM && hash_algo == HASH_SHA256) {
+		sha256_begin(&context.sha256);
+		update = (void*)sha256_hash;
+		final = (void*)sha256_end;
+		hash_len = 32;
+	} else if (ENABLE_SHA512SUM && hash_algo == HASH_SHA512) {
+		sha512_begin(&context.sha512);
+		update = (void*)sha512_hash;
+		final = (void*)sha512_end;
+		hash_len = 64;
 	} else {
-		bb_error_msg_and_die("algorithm not supported");
+		xfunc_die(); /* can't reach this */
 	}
 
-	while (0 < (count = safe_read(src_fd, in_buf, 4096))) {
-		update(in_buf, count, &context);
-	}
-
-	if (count == 0) {
-		final(in_buf, &context);
-		hash_value = hash_bin_to_hex(in_buf, hash_len);
+	{
+		RESERVE_CONFIG_UBUFFER(in_buf, 4096);
+		while ((count = safe_read(src_fd, in_buf, 4096)) > 0) {
+			update(&context, in_buf, count);
+		}
+		if (count == 0) {
+			final(&context, in_buf);
+			hash_value = hash_bin_to_hex(in_buf, hash_len);
+		}
+		RELEASE_CONFIG_BUFFER(in_buf);
 	}
 
-	RELEASE_CONFIG_BUFFER(in_buf);
-
 	if (src_fd != STDIN_FILENO) {
 		close(src_fd);
 	}
@@ -78,51 +151,47 @@ static uint8_t *hash_file(const char *filename, hash_algo_t hash_algo)
 	return hash_value;
 }
 
-int md5_sha1_sum_main(int argc, char **argv)
+int md5_sha1_sum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv)
 {
 	int return_value = EXIT_SUCCESS;
-	uint8_t *hash_value;
 	unsigned flags;
-	hash_algo_t hash_algo = ENABLE_MD5SUM
-		? (ENABLE_SHA1SUM ? (**argv=='m' ? HASH_MD5 : HASH_SHA1) : HASH_MD5)
-		: HASH_SHA1;
 
-	if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK)
-		flags = getopt32(argc, argv, "scw");
-	else optind = 1;
+	if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK) {
+		/* -b "binary", -t "text" are ignored (shaNNNsum compat) */
+		flags = getopt32(argv, "scwbt");
+		argv += optind;
+		//argc -= optind;
+	} else {
+		argv += 1;
+		//argc -= 1;
+	}
+	if (!*argv)
+		*--argv = (char*)"-";
 
 	if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && !(flags & FLAG_CHECK)) {
 		if (flags & FLAG_SILENT) {
-			bb_error_msg_and_die
-				("-%c is meaningful only when verifying checksums", 's');
-		} else if (flags & FLAG_WARN) {
-			bb_error_msg_and_die
-				("-%c is meaningful only when verifying checksums", 'w');
+			bb_error_msg_and_die("-%c is meaningful only with -c", 's');
+		}
+		if (flags & FLAG_WARN) {
+			bb_error_msg_and_die("-%c is meaningful only with -c", 'w');
 		}
-	}
-
-	if (argc == optind) {
-		argv[argc++] = (char*)"-";
 	}
 
 	if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && (flags & FLAG_CHECK)) {
 		FILE *pre_computed_stream;
 		int count_total = 0;
 		int count_failed = 0;
-		char *file_ptr = argv[optind];
 		char *line;
 
-		if (optind + 1 != argc) {
-			bb_error_msg_and_die
-				("only one argument may be specified when using -c");
+		if (argv[1]) {
+			bb_error_msg_and_die("only one argument may be specified with -c");
 		}
 
-		pre_computed_stream = stdin;
-		if (NOT_LONE_DASH(file_ptr)) {
-			pre_computed_stream = xfopen(file_ptr, "r");
-		}
+		pre_computed_stream = xfopen_stdin(argv[0]);
 
-		while ((line = xmalloc_getline(pre_computed_stream)) != NULL) {
+		while ((line = xmalloc_fgetline(pre_computed_stream)) != NULL) {
+			uint8_t *hash_value;
 			char *filename_ptr;
 
 			count_total++;
@@ -143,7 +212,7 @@ int md5_sha1_sum_main(int argc, char **argv)
 			*filename_ptr = '\0';
 			filename_ptr += 2;
 
-			hash_value = hash_file(filename_ptr, hash_algo);
+			hash_value = hash_file(filename_ptr);
 
 			if (hash_value && (strcmp((char*)hash_value, line) == 0)) {
 				if (!(flags & FLAG_SILENT))
@@ -164,21 +233,19 @@ int md5_sha1_sum_main(int argc, char **argv)
 		}
 		/*
 		if (fclose_if_not_stdin(pre_computed_stream) == EOF) {
-			bb_perror_msg_and_die("cannot close file %s", file_ptr);
+			bb_perror_msg_and_die("can't close file %s", file_ptr);
 		}
 		*/
 	} else {
-		while (optind < argc) {
-			char *file_ptr = argv[optind++];
-
-			hash_value = hash_file(file_ptr, hash_algo);
+		do {
+			uint8_t *hash_value = hash_file(*argv);
 			if (hash_value == NULL) {
 				return_value = EXIT_FAILURE;
 			} else {
-				printf("%s  %s\n", hash_value, file_ptr);
+				printf("%s  %s\n", hash_value, *argv);
 				free(hash_value);
 			}
-		}
+		} while (*++argv);
 	}
 	return return_value;
 }