#include "ndstool.h"
#include "banner.h"
#include "sha1.h"
#include "crc.h"
#include "bigint.h"
#include "arm7_sha1_homebrew.h"
#include "arm7_sha1_nintendo.h"
#include "encryption.h"

/*
 * Data
 */
unsigned char publicKeyNintendo[] =
{
	0x9E, 0xC1, 0xCC, 0xC0, 0x4A, 0x6B, 0xD0, 0xA0, 0x6D, 0x62, 0xED, 0x5F, 0x15, 0x67, 0x87, 0x12,
	0xE6, 0xF4, 0x77, 0x1F, 0xD8, 0x5C, 0x81, 0xCE, 0x0C, 0xD0, 0x22, 0x31, 0xF5, 0x89, 0x08, 0xF5,
	0xBE, 0x04, 0xCB, 0xC1, 0x4F, 0x63, 0xD9, 0x5A, 0x98, 0xFF, 0xEB, 0x36, 0x0F, 0x9C, 0x5D, 0xAD,
	0x15, 0xB9, 0x99, 0xFB, 0xC6, 0x86, 0x2C, 0x0A, 0x0C, 0xFC, 0xE6, 0x86, 0x03, 0x60, 0xD4, 0x87,
	0x28, 0xD5, 0x66, 0x42, 0x9C, 0xF7, 0x04, 0x14, 0x4E, 0x6F, 0x73, 0x20, 0xC3, 0x3E, 0x3F, 0xF5,
	0x82, 0x2E, 0x78, 0x18, 0xD6, 0xCD, 0xD5, 0xC2, 0xDC, 0xAA, 0x1D, 0x34, 0x91, 0xEC, 0x99, 0xC9,
	0xF7, 0xBF, 0xBF, 0xA0, 0x0E, 0x1E, 0xF0, 0x25, 0xF8, 0x66, 0x17, 0x54, 0x34, 0x28, 0x2D, 0x28,
	0xA3, 0xAE, 0xF0, 0xA9, 0xFA, 0x3A, 0x70, 0x56, 0xD2, 0x34, 0xA9, 0xC5, 0x9E, 0x5D, 0xF5, 0xE1,
};

/*
 * CalcHeaderCRC
 */
unsigned short CalcHeaderCRC(Header &header)
{
	return CalcCrc16((unsigned char *)&header, 0x15E);
}

/*
 * CalcLogoCRC
 */
unsigned short CalcLogoCRC(Header &header)
{
	return CalcCrc16((unsigned char *)&header + 0xC0, 156);
}

/*
 * DetectRomType
 */
int DetectRomType()
{
	fseek(fNDS, 0x4000, SEEK_SET);
	unsigned int data[3];
	fread(data, 1, sizeof(data), fNDS);
	if (header.arm9_rom_offset < 0x4000) return ROMTYPE_HOMEBREW;
	if (data[0] == 0x00000000 && data[1] == 0x00000000) return ROMTYPE_MULTIBOOT;
	if (data[0] == 0xE7FFDEFF && data[1] == 0xE7FFDEFF) return ROMTYPE_NDSDUMPED;
	fseek(fNDS, 0x200, SEEK_SET);
	for (int i=0x200; i<0x4000; i++)
		if (fgetc(fNDS)) return ROMTYPE_MASKROM;	// found something odd ;)
	return ROMTYPE_ENCRSECURE;
}

/*
 * CalcSecureAreaCRC
 */
unsigned short CalcSecureAreaCRC(bool encrypt)
{
	fseek(fNDS, 0x4000, SEEK_SET);
	unsigned char data[0x4000];
	fread(data, 1, 0x4000, fNDS);
	if (encrypt) encrypt_arm9(*(u32 *)header.gamecode, data);
	return CalcCrc16(data, 0x4000);
}

/*
 * CalcSecurityDataCRC
 */
unsigned short CalcSecurityDataCRC()
{
	fseek(fNDS, 0x1000, SEEK_SET);
	unsigned char data[0x2000];
	fread(data, 1, 0x2000, fNDS);
	return CalcCrc16(data, 0x2000);
}

/*
 * CalcSegment3CRC
 */
unsigned short CalcSegment3CRC()
{
	fseek(fNDS, 0x3000, SEEK_SET);
	unsigned char data[0x1000];
	fread(data, 1, 0x1000, fNDS);
	for (int i=0; i<0x1000; i+=2)	// swap bytes
	{
		unsigned char t = data[i+1]; data[i+1] = data[i]; data[i] = t;
	}
	return CalcCcitt16(data, 0x1000);	// why would they use CRC16-CCITT ?
}

/*
 * FixHeaderCRC
 */
void FixHeaderCRC(char *ndsfilename)
{
	fNDS = fopen(ndsfilename, "r+b");
	if (!fNDS) { fprintf(stderr, "Cannot open file '%s'.\n", ndsfilename); exit(1); }
	fread(&header, 512, 1, fNDS);
	header.header_crc = CalcHeaderCRC(header);
	fseek(fNDS, 0, SEEK_SET);
	fwrite(&header, 512, 1, fNDS);
	fclose(fNDS);
}

/*
 * ShowHeaderInfo
 */
void ShowHeaderInfo(Header &header, int romType, unsigned int length = 0x200)
{
	printf("0x00\t%-25s\t", "Game title");

	for (unsigned int i=0; i<sizeof(header.title); i++)
		if (header.title[i]) putchar(header.title[i]); printf("\n");

	printf("0x0C\t%-25s\t", "Game code");
	for (unsigned int i=0; i<sizeof(header.gamecode); i++)
		if (header.gamecode[i]) putchar(header.gamecode[i]);
	for (int i=0; i<NumCountries; i++)
	{
		if (countries[i].countrycode == header.gamecode[3])
		{
			printf(" (NTR-");
			for (unsigned int j=0; j<sizeof(header.gamecode); j++)
				if (header.gamecode[j]) putchar(header.gamecode[j]);
			printf("-%s)", countries[i].name);
			break;
		}
	}
	printf("\n");
	
	printf("0x10\t%-25s\t", "Maker code"); for (unsigned int i=0; i<sizeof(header.makercode); i++)
		if (header.makercode[i]) putchar(header.makercode[i]);
	for (int j=0; j<NumMakers; j++)
	{
		if ((makers[j].makercode[0] == header.makercode[0]) && (makers[j].makercode[1] == header.makercode[1]))
		{
			printf(" (%s)", makers[j].name);
			break;
		}
	}
	printf("\n");

	printf("0x12\t%-25s\t0x%02X\n", "Unit code", header.unitcode);
	printf("0x13\t%-25s\t0x%02X\n", "Device type", header.devicetype);
	printf("0x14\t%-25s\t0x%02X (%d Mbit)\n", "Device capacity", header.devicecap, 1<<header.devicecap);
	printf("0x15\t%-25s\t", "reserved 1"); for (unsigned int i=0; i<sizeof(header.reserved1); i++) printf("%02X", header.reserved1[i]); printf("\n");
	printf("0x1E\t%-25s\t0x%02X\n", "ROM version", header.romversion);
	printf("0x1F\t%-25s\t0x%02X\n", "reserved 2", header.reserved2);
	printf("0x20\t%-25s\t0x%X\n", "ARM9 ROM offset", (int)header.arm9_rom_offset);
	printf("0x24\t%-25s\t0x%X\n", "ARM9 entry address", (int)header.arm9_entry_address);
	printf("0x28\t%-25s\t0x%X\n", "ARM9 RAM address", (int)header.arm9_ram_address);
	printf("0x2C\t%-25s\t0x%X\n", "ARM9 code size", (int)header.arm9_size);
	printf("0x30\t%-25s\t0x%X\n", "ARM7 ROM offset", (int)header.arm7_rom_offset);
	printf("0x34\t%-25s\t0x%X\n", "ARM7 entry address", (int)header.arm7_entry_address);
	printf("0x38\t%-25s\t0x%X\n", "ARM7 RAM address", (int)header.arm7_ram_address);
	printf("0x3C\t%-25s\t0x%X\n", "ARM7 code size", (int)header.arm7_size);
	printf("0x40\t%-25s\t0x%X\n", "File name table offset", (int)header.fnt_offset);
	printf("0x44\t%-25s\t0x%X\n", "File name table size", (int)header.fnt_size);
	printf("0x48\t%-25s\t0x%X\n", "FAT offset", (int)header.fat_offset);
	printf("0x4C\t%-25s\t0x%X\n", "FAT size", (int)header.fat_size);
	printf("0x50\t%-25s\t0x%X\n", "ARM9 overlay offset", (int)header.arm9_overlay_offset);
	printf("0x54\t%-25s\t0x%X\n", "ARM9 overlay size", (int)header.arm9_overlay_size);
	printf("0x58\t%-25s\t0x%X\n", "ARM7 overlay offset", (int)header.arm7_overlay_offset);
	printf("0x5C\t%-25s\t0x%X\n", "ARM7 overlay size", (int)header.arm7_overlay_size);
	printf("0x60\t%-25s\t0x%08X\n", "ROM control info 1", (int)header.rom_control_info1);
	printf("0x64\t%-25s\t0x%08X\n", "ROM control info 2", (int)header.rom_control_info2);
	printf("0x68\t%-25s\t0x%X\n", "Icon/title offset", (int)header.banner_offset);
	unsigned short secure_area_crc = CalcSecureAreaCRC((romType == ROMTYPE_NDSDUMPED));
	const char *s1, *s2 = "";
	if (romType == ROMTYPE_HOMEBREW) s1 = "-";
	else if (secure_area_crc == header.secure_area_crc) s1 = "OK";
	else
	{
		s1 = "INVALID";
	}
	switch (romType)
	{
		case ROMTYPE_HOMEBREW: s2 = "homebrew"; break;
		case ROMTYPE_MULTIBOOT: s2 = "multiboot"; break;
		case ROMTYPE_NDSDUMPED: s2 = "decrypted"; break;
		case ROMTYPE_ENCRSECURE: s2 = "encrypted"; break;
		case ROMTYPE_MASKROM: s2 = "mask ROM"; break;
	}
	printf("0x6C\t%-25s\t0x%04X (%s, %s)\n", "Secure area CRC", (int)header.secure_area_crc, s1, s2);
	printf("0x6E\t%-25s\t0x%04X\n", "ROM control info 3", (int)header.rom_control_info3);
	printf("0x70\t%-25s\t0x%X\n", "ARM9 ?", (int)header.offset_0x70);
	printf("0x74\t%-25s\t0x%X\n", "ARM7 ?", (int)header.offset_0x74);
	printf("0x78\t%-25s\t0x%08X\n", "Magic 1", (int)header.offset_0x78);
	printf("0x7C\t%-25s\t0x%08X\n", "Magic 2", (int)header.offset_0x7C);
	printf("0x80\t%-25s\t0x%08X\n", "Application end offset", (int)header.application_end_offset);
	printf("0x84\t%-25s\t0x%08X\n", "ROM header size", (int)header.rom_header_size);
	for (unsigned int i=0x88; i<0xC0; i+=4)
	{
		unsigned_int &x = ((unsigned_int *)&header)[i/4];
		if (x != 0) printf("0x%02X\t%-25s\t0x%08X\n", i, "?", (int)x);
	}
	unsigned short logo_crc = CalcLogoCRC(header);
	printf("0x15C\t%-25s\t0x%04X (%s)\n", "Logo CRC", (int)header.logo_crc, (logo_crc == header.logo_crc) ? "OK" : "INVALID");
	unsigned short header_crc = CalcHeaderCRC(header);
	printf("0x15E\t%-25s\t0x%04X (%s)\n", "Header CRC", (int)header.header_crc, (header_crc == header.header_crc) ? "OK" : "INVALID");
	for (unsigned int i=0x160; i<length; i+=4)
	{
		unsigned_int &x = ((unsigned_int *)&header)[i/4];
		if (x != 0) printf("0x%02X\t%-25s\t0x%08X\n", i, "?", (int)x);
	}
}

/*
 * HeaderSha1
 */
void HeaderSha1(FILE *fNDS, unsigned char *header_sha1, int romType)
{
	sha1_ctx m_sha1;
	sha1_begin(&m_sha1);
	unsigned char buf[32 + 0x200];
	fseek(fNDS, 0x200, SEEK_SET);		// check for 32 bytes text + alternate header
	fread(buf, 1, sizeof(buf), fNDS);
	if (!memcmp(buf, "DS DOWNLOAD PLAY", 16))	// found?
	{
		sha1_hash(buf + 0x20, 0x160, &m_sha1);	// alternate header
		if (verbose >= 2)
		{
			printf("{ DS Download Play(TM) / Wireless MultiBoot header information:\n");
			ShowHeaderInfo(*(Header *)(buf + 0x20), romType, 0x160);
			printf("}\n");
		}
	}
	else
	{
		fseek(fNDS, 0, SEEK_SET);
		fread(buf, 1, sizeof(buf), fNDS);
		sha1_hash(buf, 0x160, &m_sha1);
	}
	sha1_end(header_sha1, &m_sha1);
}

/*
 * Arm9Sha1Multiboot
 */
void Arm9Sha1Multiboot(FILE *fNDS, unsigned char *arm9_sha1)
{
	sha1_ctx m_sha1;
	sha1_begin(&m_sha1);
	fseek(fNDS, header.arm9_rom_offset, SEEK_SET);
	unsigned int len = header.arm9_size;
	unsigned char *buf = new unsigned char [len];
	fread(buf, 1, len, fNDS);
	//printf("%u\n", len);
	sha1_hash(buf, len, &m_sha1);
	delete [] buf;
	sha1_end(arm9_sha1, &m_sha1);
}

/*
C:\NitroSDK\tools\bin>emuchild.exe -d AMFE.bin C:\NitroSDK\build\demos\mb\cloneboot\etc\libsyscall_child.bin AMFE.bi
option -d: No ARG
argc=3  optind=2
004B0020 16777216 bytes  ReadFile 'AMFE.bin'
00475200     2048 bytes  ReadFile 'C:\NitroSDK\build\demos\mb\cloneboot\etc\libsyscall_child.bin'
004B0020 16777216 bytes  WriteFile 'AMFE.bi'


    -a I_OFFSET  Default 0x4000. Location to insert syscall.
    -A I_SIZE    Default 0x0800. Size to insert.
    -c C_OFFSET  Default 0x5000. Location to clear romimage.
    -C C_SIZE    Default 0x2000. Size to clear.
    -d           Show debug messages (for test purpose)
    -h           Show this  message

*/

/*
 * Arm9Sha1ClearedOutArea
 */
void Arm9Sha1ClearedOutArea(FILE *fNDS, unsigned char *arm9_sha1)
{
	sha1_ctx m_sha1;
	sha1_begin(&m_sha1);
	fseek(fNDS, header.arm9_rom_offset, SEEK_SET);
	unsigned int len = header.arm9_size;
	unsigned char *buf = new unsigned char [len];

	int len1 = (0x5000 - header.arm9_rom_offset);		// e.g. 0x5000 - 0x4000 = 0x1000
	int len3 = header.arm9_size - (0x7000 - header.arm9_rom_offset);	// e.g. 0x10000 - (0x7000 - 0x4000) = 0xD000
	int len2 = header.arm9_size - len1 - len3;			// e.g. 0x10000 - 0x1000 - 0xD000 = 0x2000
	if (len1 > 0) fread(buf, 1, len1, fNDS);
	if (len2 > 0) { memset(buf + len1, 0, len2); fseek(fNDS, len2, SEEK_CUR); }		// gets cleared for security?
	if (len3 > 0) fread(buf + len1 + len2, 1, len3, fNDS);
//	printf("%X %X %X\n", len1, len2, len3);

//		memset(buf, 0, 0x800);		// clear "secure area" too

	sha1_hash(buf, len, &m_sha1);
	delete [] buf;
	sha1_end(arm9_sha1, &m_sha1);
}

/*
 * Arm7Sha1
 */
void Arm7Sha1(FILE *fNDS, unsigned char *arm7_sha1)
{
	sha1_ctx m_sha1;
	sha1_begin(&m_sha1);
	fseek(fNDS, header.arm7_rom_offset, SEEK_SET);
	unsigned int len = header.arm7_size;
	unsigned char *buf = new unsigned char [len];
	fread(buf, 1, len, fNDS);
	//printf("%u\n", len);
	sha1_hash(buf, len, &m_sha1);
	delete [] buf;
	sha1_end(arm7_sha1, &m_sha1);
}

/*
 * CompareSha1WithList
 */
int CompareSha1WithList(unsigned char *arm7_sha1, const unsigned char *text, unsigned int textSize)
{
	while (1)
	{
		//printf("\n");
		for (int i=0; i<SHA1_DIGEST_SIZE; i++)
		{
			unsigned char b = 0;
			for (int n=0; n<2; n++)
			{
				//printf("%c", *text);
				if (!*text) return -1;
				b = b << 4 | ((*text > '9') ? ((*text - 'A') & 7) + 10 : *text - '0');
				text++;
			}
			//printf("%02X", b);
			if (b != arm7_sha1[i]) break; else if (i == 19) return 0;
		}
		while (*text && (*text >= ' ')) text++;		// line end
		while (*text && (*text < ' ')) text++;		// new line
	}
}

/*
 * HashAndCompareWithList
 * -1=error, 0=match, 1=no match
 */
int HashAndCompareWithList(char *filename, unsigned char sha1[])
{
	FILE *f = fopen(filename, "rb");
	if (!f) return -1;
	sha1_ctx m_sha1;
	sha1_begin(&m_sha1);
	unsigned char buf[1024];
	unsigned int r;
	do
	{
		r = fread(buf, 1, 1024, f);
		sha1_hash(buf, r, &m_sha1);
	} while (r > 0);
	fclose(f);
	sha1_end(sha1, &m_sha1);
	if (CompareSha1WithList(sha1, arm7_sha1_homebrew, arm7_sha1_homebrew_size)) return 1;	// not yet in list
	return 0;
}

/*
 * strsepc
 */
char *strsepc(char **s, char d)
{
	char *r = *s;
	for (char *p = *s; ; p++)
	{
		if (*p == 0) { *s = p; break; }
		if (*p == d) { *s = p+1; *p = 0; break; }
	}
	return r;
}

/*
 * RomListInfo
 */
void RomListInfo(unsigned int crc32_match)
{
	if (!romlistfilename) return;
	FILE *fRomList = fopen(romlistfilename, "rt");
	if (!fRomList) { fprintf(stderr, "Cannot open file '%s'.\n", romlistfilename); exit(1); }
	char s[1024];
	while (fgets(s, 1024, fRomList))	// empty, title, title, title, title, filename, CRC32
	{
		char *p = s;
		if (strlen(strsepc(&p, '\xAC')) == 0)
		{
			char *title = strsepc(&p, '\xAC');
			unsigned int index = strtoul(title, 0, 10);
			title += 7;
			char *b1 = strchr(title, '(');
			char *b2 = b1 ? strchr(b1+1, ')') : 0;
			char *b3 = b2 ? strchr(b2+1, '(') : 0;
			char *b4 = b3 ? strchr(b3+1, ')') : 0;
			char *group = 0;
			if (b1 + 2 == b2) if (b3 && b4) { *b3 = 0; *b4 = 0; group = b3+1; }		// remove release group name
			strsepc(&p, '\xAC'); strsepc(&p, '\xAC');
			strsepc(&p, '\xAC'); strsepc(&p, '\xAC');
			unsigned long crc32 = strtoul(strsepc(&p, '\xAC'), 0, 16);
			if (crc32 == crc32_match)
			{
				printf("Release index: \t%u\n", index);
				printf("Release title: \t%s\n", title);
				printf("Release group: \t%s\n", group ? group : "");
			}
			//for (int i=0; i<10; i++) printf("%d %s\n", i, strsepc(&p, '\xAC'));
		}
	}
}

/*
 * ShowVerboseInfo
 */
void ShowVerboseInfo(FILE *fNDS, Header &header, int romType)
{
	// calculate SHA1 of ARM7 binary
	unsigned char arm7_sha1[SHA1_DIGEST_SIZE];
	Arm7Sha1(fNDS, arm7_sha1);

	// find signature data
	unsigned_int signature_id = 0;
	fseek(fNDS, header.application_end_offset, SEEK_SET);
	fread(&signature_id, sizeof(signature_id), 1, fNDS);
	if (signature_id != 0x00016361)
	{
		fseek(fNDS, header.application_end_offset - 136, SEEK_SET);		// try again
		fread(&signature_id, sizeof(signature_id), 1, fNDS);
	}
	if (signature_id == 0x00016361)
	{
		printf("\n");

		unsigned char signature[128];
		fread(signature, 1, sizeof(signature), fNDS);

		unsigned char sha_parts[3*SHA1_DIGEST_SIZE + 4];
		fread(sha_parts + 3*SHA1_DIGEST_SIZE, 4, 1, fNDS);		// some number
		
		//printf("%08X\n", *(unsigned int *)(sha_parts + 3*SHA1_DIGEST_SIZE));

		unsigned char header_sha1[SHA1_DIGEST_SIZE];
		HeaderSha1(fNDS, header_sha1, romType);
		memcpy(sha_parts + 0*SHA1_DIGEST_SIZE, header_sha1, SHA1_DIGEST_SIZE);

		unsigned char arm9_sha1[SHA1_DIGEST_SIZE];
		if (romType == ROMTYPE_MULTIBOOT)
		{
			Arm9Sha1Multiboot(fNDS, arm9_sha1);
		}
		else
		{
			Arm9Sha1ClearedOutArea(fNDS, arm9_sha1);
		}
		memcpy(sha_parts + 1*SHA1_DIGEST_SIZE, arm9_sha1, SHA1_DIGEST_SIZE);

		memcpy(sha_parts + 2*SHA1_DIGEST_SIZE, arm7_sha1, SHA1_DIGEST_SIZE);

		unsigned char sha_final[SHA1_DIGEST_SIZE];
		{
			sha1_ctx m_sha1;
			sha1_begin(&m_sha1);
			unsigned int len = sizeof(sha_parts);
			unsigned char *buf = sha_parts;
			sha1_hash(buf, len, &m_sha1);
			sha1_end(sha_final, &m_sha1);
		}

		// calculate SHA1 from signature
		unsigned char sha1_from_sig[SHA1_DIGEST_SIZE];
		{
			BigInt _signature;
			_signature.Set(signature, sizeof(signature));
			//printf("signature: "); _signature.print();

			BigInt _publicKey;
			_publicKey.Set(publicKeyNintendo, sizeof(publicKeyNintendo));
			//printf("public key: "); _publicKey.print();

			BigInt big_sha1;
			big_sha1.PowMod(_signature, _publicKey);
			//printf("big_sha1: "); big_sha1.print();
			big_sha1.Get(sha1_from_sig, sizeof(sha1_from_sig));
		}
		
		bool ok = (memcmp(sha_final, sha1_from_sig, SHA1_DIGEST_SIZE) == 0);
		printf("DS Download Play(TM) / Wireless MultiBoot signature: %s\n", ok ? "OK" : "INVALID");
		if (!ok)
		{
			printf("header hash:    \t"); for (int i=0; i<SHA1_DIGEST_SIZE; i++) printf("%02X", (sha_parts + 0*SHA1_DIGEST_SIZE)[i]); printf("\n");
			printf("ARM9 hash:      \t"); for (int i=0; i<SHA1_DIGEST_SIZE; i++) printf("%02X", (sha_parts + 1*SHA1_DIGEST_SIZE)[i]); printf("\n");
			printf("ARM7 hash:      \t"); for (int i=0; i<SHA1_DIGEST_SIZE; i++) printf("%02X", (sha_parts + 2*SHA1_DIGEST_SIZE)[i]); printf("\n");
			printf("combined hash:  \t"); for (int i=0; i<SHA1_DIGEST_SIZE; i++) printf("%02X", sha_final[i]); printf("\n");
			printf("signature hash: \t"); for (int i=0; i<SHA1_DIGEST_SIZE; i++) printf("%02X", sha1_from_sig[i]); printf("\n");
		}
	}
	
	// CRC32
	{
		unsigned char *buf = new unsigned char [0x10000];
		fseek(fNDS, 0, SEEK_SET);
		unsigned long crc32 = ~0;
		int r;
		while ((r = fread(buf, 1, 0x10000, fNDS)) > 0)
		{
			crc32 = CalcCrc32(buf, r, crc32);
		}
		crc32 = ~crc32;
		delete [] buf;

		printf("\nFile CRC32:    \t%08X\n", (unsigned int)crc32);
		RomListInfo(crc32);
	}
	
	// ROM dumper 1.0 bad data
	{
		unsigned char buf[0x200];
		fseek(fNDS, 0x7E00, SEEK_SET);
		fread(buf, 1, 0x200, fNDS);
		unsigned long crc32 = ~CalcCrc32(buf, 0x200);
		printf("\nSMT dumper v1.0 corruption check: \t%s\n", (crc32 == 0x7E8B456F) ? "CORRUPTED" : "OK");
	}

	// Verify ARM7 SHA1 hash against known default binaries
	int bKnownArm7 = 0;
	{
		printf("\nARM7 binary hash : \t"); for (int i=0; i<SHA1_DIGEST_SIZE; i++) printf("%02X", arm7_sha1[i]); printf("\n");

		if (CompareSha1WithList(arm7_sha1, arm7_sha1_homebrew, arm7_sha1_homebrew_size) == 0)
		{
			bKnownArm7 = 1; printf("ARM7 binary is homebrew verified.\n");
		}
		if (CompareSha1WithList(arm7_sha1, arm7_sha1_nintendo, arm7_sha1_nintendo_size) == 0)
		{
			bKnownArm7 = 2; printf("ARM7 binary is Nintendo verified.\n");
		}
		if (!bKnownArm7) printf("WARNING! ARM7 binary is NOT verified!\n");
	}

	// check ARM7 RAM address
	if (bKnownArm7 != 2)
	if ((header.arm7_ram_address < 0x03000000) || (header.arm7_ram_address >= 0x04000000))
	{
		printf("\nWARNING! ARM7 RAM address does not point to shared memory!\n");
	}

	// check ARM7 entry address
	if ((header.arm7_entry_address < header.arm7_ram_address) ||
		(header.arm7_entry_address > header.arm7_ram_address + header.arm7_size))
	{
		printf("\nWARNING! ARM7 entry address points outside of ARM7 binary!\n");
	}
}

/*
 * ShowInfo
 */
void ShowInfo(char *ndsfilename)
{
	fNDS = fopen(ndsfilename, "rb");
	if (!fNDS) { fprintf(stderr, "Cannot open file '%s'.\n", ndsfilename); exit(1); }
	fread(&header, 512, 1, fNDS);

	int romType = DetectRomType();

	printf("Header information:\n");
	ShowHeaderInfo(header, romType);

	// banner info
	if (header.banner_offset)
	{
		Banner banner;
		fseek(fNDS, header.banner_offset, SEEK_SET);
		if (fread(&banner, 1, sizeof(banner), fNDS))
		{
			unsigned short banner_crc = CalcBannerCRC(banner);
			printf("\n");
			printf("Banner CRC:                     \t0x%04X (%s)\n", (int)banner.crc, (banner_crc == banner.crc) ? "OK" : "INVALID");
	
			for (int language=1; language<=1; language++)
			{
				int line = 1;
				bool nextline = true;
				for (int i=0; i<128; i++)
				{
					unsigned short c = banner.title[language][i];
					if (c >= 128) c = '_';
					if (c == 0x00) { printf("\n"); break; }
					if (c == 0x0A)
					{
						nextline = true;
					}
					else
					{
						if (nextline)
						{
							if (line != 1) printf("\n");
							printf("%s banner text, line %d:", bannerLanguages[language], line);
							for (unsigned int i=0; i<11 - strlen(bannerLanguages[language]); i++) putchar(' ');
							printf("\t");
							nextline = false;
							line++;
						}
						putchar(c);
					}
				}
			}
		}
	}

	// ARM9 footer
	fseek(fNDS, header.arm9_rom_offset + header.arm9_size, SEEK_SET);
	unsigned_int nitrocode;
	if (fread(&nitrocode, sizeof(nitrocode), 1, fNDS) && (nitrocode == 0xDEC00621))
	{
		printf("\n");
		printf("ARM9 footer found.\n");
		unsigned_int x;
		fread(&x, sizeof(x), 1, fNDS);
		fread(&x, sizeof(x), 1, fNDS);
	}

	// show security CRCs
	if (romType >= ROMTYPE_NDSDUMPED)
	{
		printf("\n");
		unsigned short securitydata_crc = CalcSecurityDataCRC();
		printf("Security data CRC (0x1000-0x2FFF)  0x%04X\n", (int)securitydata_crc);
		unsigned short segment3_crc = CalcSegment3CRC();
		printf("Segment3 CRC (0x3000-0x3FFF)       0x%04X (%s)\n", (int)segment3_crc, (segment3_crc == 0x0254) ? "OK" : "INVALID");
	}

	// more information
	if (verbose >= 1)
	{
		ShowVerboseInfo(fNDS, header, romType);
	}

	fclose(fNDS);
}