Add the MD5 message digest algorithm draft implementation

ChaosTests/CMakeLists.txt

@@ -9,7 +9,7 @@ FetchContent_Declare(
 set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
 FetchContent_MakeAvailable(googletest)
 
-add_executable(ChaosTests Md4HasherTests.cpp)
+add_executable(ChaosTests Md4HasherTests.cpp Md5HasherTests.cpp)
 target_link_libraries(ChaosTests gtest gtest_main)
 target_include_directories(ChaosTests PRIVATE
     $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/Chaos>

ChaosTests/MD5HasherTests.cpp

@@ -0,0 +1,177 @@
+#include <gtest/gtest.h>
+
+#include "Md5.hpp"
+
+using namespace Chaos;
+
+TEST(Md5Tests, RFCTest)
+{
+    struct Helper
+    {
+        std::string operator()(const char * in) const
+        {
+            Md5::Hasher hasher;
+            hasher.Update(in, in + strlen(in));
+            return hasher.Finish().ToHexString();
+        }
+    };
+
+    Helper hash;
+
+    ASSERT_EQ("d41d8cd98f00b204e9800998ecf8427e", hash(""));
+    ASSERT_EQ("0cc175b9c0f1b6a831c399e269772661", hash("a"));
+    ASSERT_EQ("900150983cd24fb0d6963f7d28e17f72", hash("abc"));
+    ASSERT_EQ("f96b697d7cb7938d525a2f31aaf161d0", hash("message digest"));
+    ASSERT_EQ("c3fcd3d76192e4007dfb496cca67e13b", hash("abcdefghijklmnopqrstuvwxyz"));
+    ASSERT_EQ("d174ab98d277d9f5a5611c2c9f419d9f", hash("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"));
+    ASSERT_EQ("57edf4a22be3c955ac49da2e2107b67a", hash("12345678901234567890123456789012345678901234567890123456789012345678901234567890"));
+}
+
+TEST(Md5Tests, PartialUpdateTest)
+{
+    {
+        // "a"
+        Md5::Hasher hasher;
+
+        {
+            const char * in = "a";
+            hasher.Update(in, in + strlen(in));
+        }
+
+        {
+            const char * in = "";
+            hasher.Update(in, in + strlen(in));
+        }
+
+        ASSERT_EQ("0cc175b9c0f1b6a831c399e269772661", hasher.Finish().ToHexString());
+    }
+
+    {
+        // "abc"
+        Md5::Hasher hasher;
+
+        {
+            const char * in = "ab";
+            hasher.Update(in, in + strlen(in));
+        }
+
+        {
+            const char * in = "c";
+            hasher.Update(in, in + strlen(in));
+        }
+
+        ASSERT_EQ("900150983cd24fb0d6963f7d28e17f72", hasher.Finish().ToHexString());
+    }
+
+    {
+        // "message digest"
+        Md5::Hasher hasher;
+
+        {
+            const char * in = "me";
+            hasher.Update(in, in + strlen(in));
+        }
+
+        {
+            const char * in = "ssage ";
+            hasher.Update(in, in + strlen(in));
+        }
+
+        {
+            const char * in = "diges";
+            hasher.Update(in, in + strlen(in));
+        }
+
+        {
+            const char * in = "t";
+            hasher.Update(in, in + strlen(in));
+        }
+
+        ASSERT_EQ("f96b697d7cb7938d525a2f31aaf161d0", hasher.Finish().ToHexString());
+    }
+
+    {
+        // "12345678901234567890123456789012345678901234567890123456789012345678901234567890"
+        Md5::Hasher hasher;
+
+        {
+            const char * in = "12345678901234567890";
+            hasher.Update(in, in + strlen(in));
+        }
+
+        {
+            const char * in = "12345678901234567890";
+            hasher.Update(in, in + strlen(in));
+        }
+
+        {
+            const char * in = "12345678901234567890";
+            hasher.Update(in, in + strlen(in));
+        }
+
+        {
+            const char * in = "12345678901234567890";
+            hasher.Update(in, in + strlen(in));
+        }
+
+        ASSERT_EQ("57edf4a22be3c955ac49da2e2107b67a", hasher.Finish().ToHexString());
+    }
+}
+
+TEST(Md5Tests, LongInputTest)
+{
+    struct Helper
+    {
+        std::string operator()(const char * in) const
+        {
+            Md5::Hasher hasher;
+            hasher.Update(in, in + strlen(in));
+            return hasher.Finish().ToHexString();
+        }
+    };
+
+    Helper hash;
+
+    // 2500 zeros ('0').
+    ASSERT_EQ("17aa376e13f65b7a4cb1a4913b5e748c", hash(std::string(2500, '0').c_str()));
+    // 1000 'a' followed by 1000 'b'.
+    ASSERT_EQ("5ede0802e614ef9cccc73dc02f04c032", hash((std::string(1000, 'a') +
+                                                        std::string(1000, 'b')).c_str()));
+}
+
+TEST(Md5Tests, LongInputPartialUpdateTest)
+{
+    {
+        // 2500 zeros ('0').
+        Md5::Hasher hasher;
+
+        std::string in(750, '0');
+
+        hasher.Update(in.begin(), in.begin() + 250);
+        hasher.Update(in.begin(), in.begin() + 500);
+        hasher.Update(in.begin(), in.begin() + 500);
+        hasher.Update(in.begin(), in.begin() + 750);
+        hasher.Update(in.begin(), in.begin() + 333);
+        hasher.Update(in.begin(), in.begin() + 167);
+
+        ASSERT_EQ("17aa376e13f65b7a4cb1a4913b5e748c", hasher.Finish().ToHexString());
+    }
+
+    {
+        // 1000 'a' followed by 1000 'b'.
+        Md5::Hasher hasher;
+
+        std::string inA(1000, 'a');
+        std::string inB(1000, 'b');
+
+        hasher.Update(inA.begin(), inA.begin() + 100);
+        hasher.Update(inA.begin(), inA.begin() + 255);
+        hasher.Update(inA.begin(), inA.begin() + 645);
+
+        hasher.Update(inB.begin(), inB.begin() + 33);
+        hasher.Update(inB.begin(), inB.begin() + 701);
+        hasher.Update(inB.begin(), inB.begin() + 266);
+
+        ASSERT_EQ("5ede0802e614ef9cccc73dc02f04c032", hasher.Finish().ToHexString());
+    }
+}