initial commit

sgutil/sgu_mode_hash_file.cpp

@@ -0,0 +1,87 @@
+#include "sgu_stdafx.h"
+#include "sgu_mode_hash_file.h"
+
+bool md5File(const char* szFileName, MD5Digest& result)
+{
+	if (!szFileName || szFileName[0]==0) {
+		printf("Error: Input filename is not specified.\n");
+		return false;
+	}
+	FILE* file = nullptr;
+	fopen_s(&file, szFileName, "rb");
+	if (!file) {
+		printf("Error: Cannot open input file %s for reading.\n", szFileName);
+		return false;
+	}
+
+	const size_t kBufferSize = 1024;
+    size_t readSize = 0;
+    uint8_t* buffer = new uint8_t[kBufferSize];
+
+    MD5Context ctx;
+    md5Init(&ctx);
+
+    while ((readSize = fread(buffer, 1, kBufferSize, file)) > 0) 
+    {
+        md5Update(&ctx, (uint8_t*)buffer, readSize);
+    }
+    result = md5Finalize(&ctx);
+	fclose(file);
+	
+    delete[] buffer;
+	return true;
+}
+
+bool sha256File(const char* szFileName, Sha256Digest& result)
+{
+	if (!szFileName || szFileName[0] == 0) {
+		printf("Error: Input filename is not specified.\n");
+		return false;
+	}
+	FILE* file = nullptr;
+	fopen_s(&file, szFileName, "rb");
+	if (!file) {
+		printf("Error: Cannot open input file %s for reading.\n", szFileName);
+		return false;
+	}
+	const size_t kBufferSize = 1024;
+	size_t readSize = 0;
+	uint8_t* buffer = new uint8_t[kBufferSize];
+	Sha256Context ctx;
+	sha256Initialise(&ctx);
+	while ((readSize = fread(buffer, 1, kBufferSize, file)) > 0) 
+	{
+		sha256Update(&ctx, (uint8_t*)buffer, readSize);
+	}
+	sha256Finalise(&ctx, result);
+	fclose(file);
+	delete[] buffer;
+	return true;
+}
+
+bool crc32File(const char* szFileName, uint32_t& result)
+{
+	if (!szFileName || szFileName[0] == 0) {
+		printf("Error: Input filename is not specified.\n");
+		return false;
+	}
+	FILE* file = nullptr;
+	fopen_s(&file, szFileName, "rb");
+	if (!file) {
+		printf("Error: Cannot open input file %s for reading.\n", szFileName);
+		return false;
+	}
+	const size_t kBufferSize = 1024;
+	size_t readSize = 0;
+	uint8_t* buffer = new uint8_t[kBufferSize];
+
+	result = 0;
+	while ((readSize = fread(buffer, 1, kBufferSize, file)) > 0)
+	{
+		result = crcMemory32(buffer, static_cast<uint32_t>(readSize), result);
+	}
+
+	fclose(file);
+	delete[] buffer;
+	return true;
+}