354 lines
11 KiB
C
354 lines
11 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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//config:config MD5SUM
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//config: bool "md5sum (6.5 kb)"
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//config: default y
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//config: help
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//config: Compute and check MD5 message digest
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//config:
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//config:config SHA1SUM
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//config: bool "sha1sum (5.9 kb)"
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//config: default y
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//config: help
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//config: Compute and check SHA1 message digest
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//config:
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//config:config SHA256SUM
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//config: bool "sha256sum (7 kb)"
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//config: default y
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//config: help
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//config: Compute and check SHA256 message digest
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//config:
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//config:config SHA512SUM
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//config: bool "sha512sum (7.4 kb)"
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//config: default y
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//config: help
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//config: Compute and check SHA512 message digest
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//config:
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//config:config SHA3SUM
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//config: bool "sha3sum (6.1 kb)"
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//config: default y
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//config: help
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//config: Compute and check SHA3 message digest
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//config:
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//config:comment "Common options for md5sum, sha1sum, sha256sum, sha512sum, sha3sum"
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//config: depends on MD5SUM || SHA1SUM || SHA256SUM || SHA512SUM || SHA3SUM
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//config:
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//config:config FEATURE_MD5_SHA1_SUM_CHECK
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//config: bool "Enable -c, -s and -w options"
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//config: default y
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//config: depends on MD5SUM || SHA1SUM || SHA256SUM || SHA512SUM || SHA3SUM
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//config: help
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//config: Enabling the -c options allows files to be checked
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//config: against pre-calculated hash values.
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//config: -s and -w are useful options when verifying checksums.
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//applet:IF_MD5SUM(APPLET_NOEXEC(md5sum, md5_sha1_sum, BB_DIR_USR_BIN, BB_SUID_DROP, md5sum))
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//applet:IF_SHA1SUM(APPLET_NOEXEC(sha1sum, md5_sha1_sum, BB_DIR_USR_BIN, BB_SUID_DROP, sha1sum))
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//applet:IF_SHA3SUM(APPLET_NOEXEC(sha3sum, md5_sha1_sum, BB_DIR_USR_BIN, BB_SUID_DROP, sha3sum))
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//applet:IF_SHA256SUM(APPLET_NOEXEC(sha256sum, md5_sha1_sum, BB_DIR_USR_BIN, BB_SUID_DROP, sha256sum))
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//applet:IF_SHA512SUM(APPLET_NOEXEC(sha512sum, md5_sha1_sum, BB_DIR_USR_BIN, BB_SUID_DROP, sha512sum))
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//kbuild:lib-$(CONFIG_MD5SUM) += md5_sha1_sum.o
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//kbuild:lib-$(CONFIG_SHA1SUM) += md5_sha1_sum.o
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//kbuild:lib-$(CONFIG_SHA256SUM) += md5_sha1_sum.o
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//kbuild:lib-$(CONFIG_SHA512SUM) += md5_sha1_sum.o
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//kbuild:lib-$(CONFIG_SHA3SUM) += md5_sha1_sum.o
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//usage:#define md5sum_trivial_usage
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//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
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//usage:#define md5sum_full_usage "\n\n"
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//usage: "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " MD5 checksums"
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//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
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//usage: "\n -c Check sums against list in FILEs"
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//usage: "\n -s Don't output anything, status code shows success"
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//usage: "\n -w Warn about improperly formatted checksum lines"
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//usage: )
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//usage:
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//usage:#define md5sum_example_usage
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//usage: "$ 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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//usage:
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//usage:#define sha3sum_trivial_usage
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//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[-a BITS] [FILE]..."
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//usage:#define sha3sum_full_usage "\n\n"
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//usage: "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA3 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: "\n -a BITS 224 (default), 256, 384, 512"
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//usage: )
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//FIXME: GNU coreutils 8.25 has no -s option, it has only these two long opts:
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// --quiet don't print OK for each successfully verified file
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// --status don't output anything, status code shows success
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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_SHA3 = '3',
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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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#if !ENABLE_SHA3SUM
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# define hash_file(f,w) hash_file(f)
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#endif
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static uint8_t *hash_file(const char *filename, unsigned sha3_width)
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{
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int src_fd, hash_len, count;
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union _ctx_ {
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sha3_ctx_t sha3;
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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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unsigned 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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}
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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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}
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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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}
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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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}
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#if ENABLE_SHA3SUM
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else if (ENABLE_SHA3SUM && hash_algo == HASH_SHA3) {
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sha3_begin(&context.sha3);
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update = (void*)sha3_hash;
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final = (void*)sha3_end;
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/*
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* Should support 224, 256, 384, 512.
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* We allow any value which does not blow the algorithm up.
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*/
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if (sha3_width >= 1600/2 /* input block can't be <= 0 */
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|| sha3_width == 0 /* hash len can't be 0 */
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|| (sha3_width & 0x1f) /* should be multiple of 32 */
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/* (because input uses up to 8 byte wide word XORs. 32/4=8) */
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) {
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bb_error_msg_and_die("bad -a%u", sha3_width);
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}
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sha3_width /= 4;
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context.sha3.input_block_bytes = 1600/8 - sha3_width;
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hash_len = sha3_width/2;
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}
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#endif
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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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bb_perror_msg("can't read '%s'", filename);
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else /* 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_SHA3SUM
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unsigned sha3_width = 224;
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#endif
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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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/* -s and -w require -c */
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#if ENABLE_SHA3SUM
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if (applet_name[3] == HASH_SHA3)
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flags = getopt32(argv, "^" "scwbta:+" "\0" "s?c:w?c", &sha3_width);
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else
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#endif
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flags = getopt32(argv, "^" "scwbt" "\0" "s?c:w?c");
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} else {
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#if ENABLE_SHA3SUM
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if (applet_name[3] == HASH_SHA3)
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getopt32(argv, "a:+", &sha3_width);
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else
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#endif
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getopt32(argv, "");
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}
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argv += optind;
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//argc -= optind;
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if (!*argv)
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*--argv = (char*)"-";
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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, sha3_width);
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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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if (count_total == 0) {
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return_value = EXIT_FAILURE;
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/*
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* md5sum from GNU coreutils 8.25 says:
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* md5sum: <FILE>: no properly formatted MD5 checksum lines found
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*/
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bb_error_msg("%s: no checksum lines found", *argv);
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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, sha3_width);
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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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