242 lines
6.8 KiB
C
242 lines
6.8 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Copyright (C) 2003 Glenn L. McGrath
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* Copyright (C) 2003-2004 Erik Andersen
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//usage:#define md5sum_trivial_usage
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//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
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//usage:#define md5sum_full_usage "\n\n"
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//usage: "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " MD5 checksums"
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//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
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//usage: "\n -c Check sums against list in FILEs"
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//usage: "\n -s Don't output anything, status code shows success"
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//usage: "\n -w Warn about improperly formatted checksum lines"
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//usage: )
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//usage:
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//usage:#define md5sum_example_usage
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//usage: "$ md5sum < busybox\n"
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//usage: "6fd11e98b98a58f64ff3398d7b324003\n"
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//usage: "$ md5sum busybox\n"
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//usage: "6fd11e98b98a58f64ff3398d7b324003 busybox\n"
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//usage: "$ md5sum -c -\n"
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//usage: "6fd11e98b98a58f64ff3398d7b324003 busybox\n"
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//usage: "busybox: OK\n"
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//usage: "^D\n"
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//usage:
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//usage:#define sha1sum_trivial_usage
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//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
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//usage:#define sha1sum_full_usage "\n\n"
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//usage: "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA1 checksums"
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//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
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//usage: "\n -c Check sums against list in FILEs"
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//usage: "\n -s Don't output anything, status code shows success"
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//usage: "\n -w Warn about improperly formatted checksum lines"
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//usage: )
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//usage:
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//usage:#define sha256sum_trivial_usage
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//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
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//usage:#define sha256sum_full_usage "\n\n"
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//usage: "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA256 checksums"
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//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
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//usage: "\n -c Check sums against list in FILEs"
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//usage: "\n -s Don't output anything, status code shows success"
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//usage: "\n -w Warn about improperly formatted checksum lines"
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//usage: )
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//usage:
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//usage:#define sha512sum_trivial_usage
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//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
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//usage:#define sha512sum_full_usage "\n\n"
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//usage: "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA512 checksums"
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//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
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//usage: "\n -c Check sums against list in FILEs"
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//usage: "\n -s Don't output anything, status code shows success"
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//usage: "\n -w Warn about improperly formatted checksum lines"
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//usage: )
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#include "libbb.h"
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/* This is a NOEXEC applet. Be very careful! */
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enum {
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/* 4th letter of applet_name is... */
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HASH_MD5 = 's', /* "md5>s<um" */
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HASH_SHA1 = '1',
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HASH_SHA256 = '2',
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HASH_SHA512 = '5',
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};
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#define FLAG_SILENT 1
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#define FLAG_CHECK 2
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#define FLAG_WARN 4
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/* This might be useful elsewhere */
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static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
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unsigned hash_length)
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{
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/* xzalloc zero-terminates */
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char *hex_value = xzalloc((hash_length * 2) + 1);
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bin2hex(hex_value, (char*)hash_value, hash_length);
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return (unsigned char *)hex_value;
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}
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static uint8_t *hash_file(const char *filename)
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{
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int src_fd, hash_len, count;
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union _ctx_ {
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sha512_ctx_t sha512;
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sha256_ctx_t sha256;
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sha1_ctx_t sha1;
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md5_ctx_t md5;
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} context;
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uint8_t *hash_value;
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void FAST_FUNC (*update)(void*, const void*, size_t);
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void FAST_FUNC (*final)(void*, void*);
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char hash_algo;
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src_fd = open_or_warn_stdin(filename);
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if (src_fd < 0) {
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return NULL;
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}
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hash_algo = applet_name[3];
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/* figure specific hash algorithms */
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if (ENABLE_MD5SUM && hash_algo == HASH_MD5) {
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md5_begin(&context.md5);
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update = (void*)md5_hash;
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final = (void*)md5_end;
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hash_len = 16;
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} else if (ENABLE_SHA1SUM && hash_algo == HASH_SHA1) {
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sha1_begin(&context.sha1);
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update = (void*)sha1_hash;
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final = (void*)sha1_end;
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hash_len = 20;
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} else if (ENABLE_SHA256SUM && hash_algo == HASH_SHA256) {
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sha256_begin(&context.sha256);
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update = (void*)sha256_hash;
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final = (void*)sha256_end;
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hash_len = 32;
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} else if (ENABLE_SHA512SUM && hash_algo == HASH_SHA512) {
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sha512_begin(&context.sha512);
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update = (void*)sha512_hash;
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final = (void*)sha512_end;
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hash_len = 64;
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} else {
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xfunc_die(); /* can't reach this */
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}
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{
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RESERVE_CONFIG_UBUFFER(in_buf, 4096);
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while ((count = safe_read(src_fd, in_buf, 4096)) > 0) {
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update(&context, in_buf, count);
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}
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hash_value = NULL;
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if (count == 0) {
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final(&context, in_buf);
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hash_value = hash_bin_to_hex(in_buf, hash_len);
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}
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RELEASE_CONFIG_BUFFER(in_buf);
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}
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if (src_fd != STDIN_FILENO) {
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close(src_fd);
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}
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return hash_value;
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}
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int md5_sha1_sum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv)
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{
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int return_value = EXIT_SUCCESS;
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unsigned flags;
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if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK) {
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/* -b "binary", -t "text" are ignored (shaNNNsum compat) */
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flags = getopt32(argv, "scwbt");
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argv += optind;
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//argc -= optind;
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} else {
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argv += 1;
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//argc -= 1;
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}
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if (!*argv)
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*--argv = (char*)"-";
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if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && !(flags & FLAG_CHECK)) {
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if (flags & FLAG_SILENT) {
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bb_error_msg_and_die("-%c is meaningful only with -c", 's');
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}
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if (flags & FLAG_WARN) {
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bb_error_msg_and_die("-%c is meaningful only with -c", 'w');
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}
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}
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do {
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if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && (flags & FLAG_CHECK)) {
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FILE *pre_computed_stream;
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char *line;
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int count_total = 0;
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int count_failed = 0;
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pre_computed_stream = xfopen_stdin(*argv);
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while ((line = xmalloc_fgetline(pre_computed_stream)) != NULL) {
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uint8_t *hash_value;
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char *filename_ptr;
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count_total++;
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filename_ptr = strstr(line, " ");
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/* handle format for binary checksums */
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if (filename_ptr == NULL) {
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filename_ptr = strstr(line, " *");
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}
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if (filename_ptr == NULL) {
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if (flags & FLAG_WARN) {
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bb_error_msg("invalid format");
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}
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count_failed++;
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return_value = EXIT_FAILURE;
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free(line);
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continue;
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}
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*filename_ptr = '\0';
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filename_ptr += 2;
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hash_value = hash_file(filename_ptr);
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if (hash_value && (strcmp((char*)hash_value, line) == 0)) {
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if (!(flags & FLAG_SILENT))
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printf("%s: OK\n", filename_ptr);
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} else {
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if (!(flags & FLAG_SILENT))
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printf("%s: FAILED\n", filename_ptr);
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count_failed++;
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return_value = EXIT_FAILURE;
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}
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/* possible free(NULL) */
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free(hash_value);
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free(line);
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}
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if (count_failed && !(flags & FLAG_SILENT)) {
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bb_error_msg("WARNING: %d of %d computed checksums did NOT match",
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count_failed, count_total);
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}
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fclose_if_not_stdin(pre_computed_stream);
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} else {
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uint8_t *hash_value = hash_file(*argv);
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if (hash_value == NULL) {
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return_value = EXIT_FAILURE;
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} else {
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printf("%s %s\n", hash_value, *argv);
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free(hash_value);
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}
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}
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} while (*++argv);
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return return_value;
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}
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