From c3086f4630bee8972f7fc0829bec524bb5fd0baf Mon Sep 17 00:00:00 2001
From: Andy Polyakov <appro@openssl.org>
Date: Fri, 14 Oct 2016 17:19:28 +0200
Subject: [PATCH] sha/keccak1600.c: add known answer and verify result with
 memcmp.

Reviewed-by: Richard Levitte <levitte@openssl.org>
---
 crypto/sha/keccak1600.c | 86 +++++++++++++++++++++++++++++++++++++++--
 1 file changed, 83 insertions(+), 3 deletions(-)

diff --git a/crypto/sha/keccak1600.c b/crypto/sha/keccak1600.c
index 6458a0408a..4397372ccb 100644
--- a/crypto/sha/keccak1600.c
+++ b/crypto/sha/keccak1600.c
@@ -263,19 +263,99 @@ void SHA3_sponge(const unsigned char *inp, size_t len,
 
 int main()
 {
+    /*
+     * This is 5-bit SHAKE128 test from http://csrc.nist.gov/groups/ST/toolkit/examples.html#aHashing
+     */
     unsigned char test[168] = { '\xf3', '\x3' };
     unsigned char out[512];
     size_t i;
+    static const unsigned char result[512] = {
+        0x2E, 0x0A, 0xBF, 0xBA, 0x83, 0xE6, 0x72, 0x0B,
+        0xFB, 0xC2, 0x25, 0xFF, 0x6B, 0x7A, 0xB9, 0xFF,
+        0xCE, 0x58, 0xBA, 0x02, 0x7E, 0xE3, 0xD8, 0x98,
+        0x76, 0x4F, 0xEF, 0x28, 0x7D, 0xDE, 0xCC, 0xCA,
+        0x3E, 0x6E, 0x59, 0x98, 0x41, 0x1E, 0x7D, 0xDB,
+        0x32, 0xF6, 0x75, 0x38, 0xF5, 0x00, 0xB1, 0x8C,
+        0x8C, 0x97, 0xC4, 0x52, 0xC3, 0x70, 0xEA, 0x2C,
+        0xF0, 0xAF, 0xCA, 0x3E, 0x05, 0xDE, 0x7E, 0x4D,
+        0xE2, 0x7F, 0xA4, 0x41, 0xA9, 0xCB, 0x34, 0xFD,
+        0x17, 0xC9, 0x78, 0xB4, 0x2D, 0x5B, 0x7E, 0x7F,
+        0x9A, 0xB1, 0x8F, 0xFE, 0xFF, 0xC3, 0xC5, 0xAC,
+        0x2F, 0x3A, 0x45, 0x5E, 0xEB, 0xFD, 0xC7, 0x6C,
+        0xEA, 0xEB, 0x0A, 0x2C, 0xCA, 0x22, 0xEE, 0xF6,
+        0xE6, 0x37, 0xF4, 0xCA, 0xBE, 0x5C, 0x51, 0xDE,
+        0xD2, 0xE3, 0xFA, 0xD8, 0xB9, 0x52, 0x70, 0xA3,
+        0x21, 0x84, 0x56, 0x64, 0xF1, 0x07, 0xD1, 0x64,
+        0x96, 0xBB, 0x7A, 0xBF, 0xBE, 0x75, 0x04, 0xB6,
+        0xED, 0xE2, 0xE8, 0x9E, 0x4B, 0x99, 0x6F, 0xB5,
+        0x8E, 0xFD, 0xC4, 0x18, 0x1F, 0x91, 0x63, 0x38,
+        0x1C, 0xBE, 0x7B, 0xC0, 0x06, 0xA7, 0xA2, 0x05,
+        0x98, 0x9C, 0x52, 0x6C, 0xD1, 0xBD, 0x68, 0x98,
+        0x36, 0x93, 0xB4, 0xBD, 0xC5, 0x37, 0x28, 0xB2,
+        0x41, 0xC1, 0xCF, 0xF4, 0x2B, 0xB6, 0x11, 0x50,
+        0x2C, 0x35, 0x20, 0x5C, 0xAB, 0xB2, 0x88, 0x75,
+        0x56, 0x55, 0xD6, 0x20, 0xC6, 0x79, 0x94, 0xF0,
+        0x64, 0x51, 0x18, 0x7F, 0x6F, 0xD1, 0x7E, 0x04,
+        0x66, 0x82, 0xBA, 0x12, 0x86, 0x06, 0x3F, 0xF8,
+        0x8F, 0xE2, 0x50, 0x8D, 0x1F, 0xCA, 0xF9, 0x03,
+        0x5A, 0x12, 0x31, 0xAD, 0x41, 0x50, 0xA9, 0xC9,
+        0xB2, 0x4C, 0x9B, 0x2D, 0x66, 0xB2, 0xAD, 0x1B,
+        0xDE, 0x0B, 0xD0, 0xBB, 0xCB, 0x8B, 0xE0, 0x5B,
+        0x83, 0x52, 0x29, 0xEF, 0x79, 0x19, 0x73, 0x73,
+        0x23, 0x42, 0x44, 0x01, 0xE1, 0xD8, 0x37, 0xB6,
+        0x6E, 0xB4, 0xE6, 0x30, 0xFF, 0x1D, 0xE7, 0x0C,
+        0xB3, 0x17, 0xC2, 0xBA, 0xCB, 0x08, 0x00, 0x1D,
+        0x34, 0x77, 0xB7, 0xA7, 0x0A, 0x57, 0x6D, 0x20,
+        0x86, 0x90, 0x33, 0x58, 0x9D, 0x85, 0xA0, 0x1D,
+        0xDB, 0x2B, 0x66, 0x46, 0xC0, 0x43, 0xB5, 0x9F,
+        0xC0, 0x11, 0x31, 0x1D, 0xA6, 0x66, 0xFA, 0x5A,
+        0xD1, 0xD6, 0x38, 0x7F, 0xA9, 0xBC, 0x40, 0x15,
+        0xA3, 0x8A, 0x51, 0xD1, 0xDA, 0x1E, 0xA6, 0x1D,
+        0x64, 0x8D, 0xC8, 0xE3, 0x9A, 0x88, 0xB9, 0xD6,
+        0x22, 0xBD, 0xE2, 0x07, 0xFD, 0xAB, 0xC6, 0xF2,
+        0x82, 0x7A, 0x88, 0x0C, 0x33, 0x0B, 0xBF, 0x6D,
+        0xF7, 0x33, 0x77, 0x4B, 0x65, 0x3E, 0x57, 0x30,
+        0x5D, 0x78, 0xDC, 0xE1, 0x12, 0xF1, 0x0A, 0x2C,
+        0x71, 0xF4, 0xCD, 0xAD, 0x92, 0xED, 0x11, 0x3E,
+        0x1C, 0xEA, 0x63, 0xB9, 0x19, 0x25, 0xED, 0x28,
+        0x19, 0x1E, 0x6D, 0xBB, 0xB5, 0xAA, 0x5A, 0x2A,
+        0xFD, 0xA5, 0x1F, 0xC0, 0x5A, 0x3A, 0xF5, 0x25,
+        0x8B, 0x87, 0x66, 0x52, 0x43, 0x55, 0x0F, 0x28,
+        0x94, 0x8A, 0xE2, 0xB8, 0xBE, 0xB6, 0xBC, 0x9C,
+        0x77, 0x0B, 0x35, 0xF0, 0x67, 0xEA, 0xA6, 0x41,
+        0xEF, 0xE6, 0x5B, 0x1A, 0x44, 0x90, 0x9D, 0x1B,
+        0x14, 0x9F, 0x97, 0xEE, 0xA6, 0x01, 0x39, 0x1C,
+        0x60, 0x9E, 0xC8, 0x1D, 0x19, 0x30, 0xF5, 0x7C,
+        0x18, 0xA4, 0xE0, 0xFA, 0xB4, 0x91, 0xD1, 0xCA,
+        0xDF, 0xD5, 0x04, 0x83, 0x44, 0x9E, 0xDC, 0x0F,
+        0x07, 0xFF, 0xB2, 0x4D, 0x2C, 0x6F, 0x9A, 0x9A,
+        0x3B, 0xFF, 0x39, 0xAE, 0x3D, 0x57, 0xF5, 0x60,
+        0x65, 0x4D, 0x7D, 0x75, 0xC9, 0x08, 0xAB, 0xE6,
+        0x25, 0x64, 0x75, 0x3E, 0xAC, 0x39, 0xD7, 0x50,
+        0x3D, 0xA6, 0xD3, 0x7C, 0x2E, 0x32, 0xE1, 0xAF,
+        0x3B, 0x8A, 0xEC, 0x8A, 0xE3, 0x06, 0x9C, 0xD9
+    };
 
-    /*
-     * This is 5-bit SHAKE128 test from http://csrc.nist.gov/groups/ST/toolkit/examples.html#aHashing
-     */
     test[167] = '\x80';
     SHA3_sponge(test, sizeof(test), out, sizeof(out), sizeof(test));
 
+    /*
+     * Rationale behind keeping output [formatted as below] is that
+     * one should be able to redirect it to a file, then copy-n-paste
+     * final "output val" from official example to another file, and
+     * compare the two with diff(1).
+     */
     for (i = 0; i < sizeof(out);) {
         printf("%02X", out[i]);
         printf(++i % 16 && i != sizeof(out) ? " " : "\n");
     }
+
+    if (memcmp(out,result,sizeof(out))) {
+        fprintf(stderr,"failure\n");
+        return 1;
+    } else {
+        fprintf(stderr,"success\n");
+        return 0;
+    }
 }
 #endif
-- 
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