sha3sum: new applet

function                                             old     new   delta
KeccakF                                                -     496    +496
KeccakF_RoundConstants                                 -     192    +192
sha3_hash                                              -     171    +171
sha3_end                                               -      40     +40
hash_file                                            274     299     +25
KeccakF_RotationConstants                              -      25     +25
KeccakF_PiLane                                         -      25     +25
packed_usage                                       29213   29232     +19
sha3_begin                                             -      18     +18
KeccakF_Mod5                                           -      10     +10
applet_names                                        2445    2453      +8
applet_main                                         1420    1424      +4
applet_nameofs                                       710     712      +2
------------------------------------------------------------------------------
(add/remove: 8/0 grow/shrink: 9/7 up/down: 1049/-54)         Total: ~995 bytes

Signed-off-by: Lauri Kasanen <curaga@operamail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

3 files changed, 27 insertions, 3 deletions

diff --git a/coreutils/Config.src b/coreutils/Config.src
index a28449b11..0c44c4b51 100644
--- a/coreutils/Config.src
+++ b/coreutils/Config.src
@@ -514,6 +514,12 @@ config SHA512SUM
         help
           Compute and check SHA512 message digest
 
+config SHA3SUM
+        bool "sha3sum"
+        default y
+        help
+          Compute and check SHA3 (512-bit) message digest
+
 config SLEEP
         bool "sleep"
         default y
@@ -766,13 +772,13 @@ config FEATURE_HUMAN_READABLE
         help
           Allow df, du, and ls to have human readable output.
 
-comment "Common options for md5sum, sha1sum, sha256sum, sha512sum"
-        depends on MD5SUM || SHA1SUM || SHA256SUM || SHA512SUM
+comment "Common options for md5sum, sha1sum, sha256sum, sha512sum, sha3sum"
+        depends on MD5SUM || SHA1SUM || SHA256SUM || SHA512SUM || SHA3SUM
 
 config FEATURE_MD5_SHA1_SUM_CHECK
         bool "Enable -c, -s and -w options"
         default y
-        depends on MD5SUM || SHA1SUM || SHA256SUM || SHA512SUM
+        depends on MD5SUM || SHA1SUM || SHA256SUM || SHA512SUM || SHA3SUM
         help
           Enabling the -c options allows files to be checked
           against pre-calculated hash values.
diff --git a/coreutils/Kbuild.src b/coreutils/Kbuild.src
index d6453f014..b715b9c47 100644
--- a/coreutils/Kbuild.src
+++ b/coreutils/Kbuild.src
@@ -62,6 +62,7 @@ lib-$(CONFIG_SEQ)       += seq.o
 lib-$(CONFIG_SHA1SUM)   += md5_sha1_sum.o
 lib-$(CONFIG_SHA256SUM) += md5_sha1_sum.o
 lib-$(CONFIG_SHA512SUM) += md5_sha1_sum.o
+lib-$(CONFIG_SHA3SUM)   += md5_sha1_sum.o
 lib-$(CONFIG_SLEEP)     += sleep.o
 lib-$(CONFIG_SPLIT)     += split.o
 lib-$(CONFIG_SORT)      += sort.o
diff --git a/coreutils/md5_sha1_sum.c b/coreutils/md5_sha1_sum.c
index 59b520fce..92a4d4462 100644
--- a/coreutils/md5_sha1_sum.c
+++ b/coreutils/md5_sha1_sum.c
@@ -55,6 +55,16 @@
 //usage:     "\n        -s      Don't output anything, status code shows success"
 //usage:     "\n        -w      Warn about improperly formatted checksum lines"
 //usage:        )
+//usage:
+//usage:#define sha3sum_trivial_usage
+//usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
+//usage:#define sha3sum_full_usage "\n\n"
+//usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA3-512 checksums"
+//usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
+//usage:     "\n        -c      Check sums against list in FILEs"
+//usage:     "\n        -s      Don't output anything, status code shows success"
+//usage:     "\n        -w      Warn about improperly formatted checksum lines"
+//usage:        )
 
 #include "libbb.h"
 
@@ -65,6 +75,7 @@ enum {
         HASH_MD5 = 's', /* "md5>s<um" */
         HASH_SHA1 = '1',
         HASH_SHA256 = '2',
+        HASH_SHA3 = '3',
         HASH_SHA512 = '5',
 };
 
@@ -86,6 +97,7 @@ static uint8_t *hash_file(const char *filename)
 {
         int src_fd, hash_len, count;
         union _ctx_ {
+                sha3_ctx_t sha3;
                 sha512_ctx_t sha512;
                 sha256_ctx_t sha256;
                 sha1_ctx_t sha1;
@@ -124,6 +136,11 @@ static uint8_t *hash_file(const char *filename)
                 update = (void*)sha512_hash;
                 final = (void*)sha512_end;
                 hash_len = 64;
+        } else if (ENABLE_SHA3SUM && hash_algo == HASH_SHA3) {
+                sha3_begin(&context.sha3);
+                update = (void*)sha3_hash;
+                final = (void*)sha3_end;
+                hash_len = 64;
         } else {
                 xfunc_die(); /* can't reach this */
         }