Added neimod's ctrtool

Will be base code for improvments

ctrtool/tik.c

@@ -0,0 +1,127 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "tik.h"
+#include "ctr.h"
+#include "utils.h"
+
+void tik_init(tik_context* ctx)
+{
+	memset(ctx, 0, sizeof(tik_context));
+}
+
+void tik_set_file(tik_context* ctx, FILE* file)
+{
+	ctx->file = file;
+}
+
+void tik_set_offset(tik_context* ctx, u32 offset)
+{
+	ctx->offset = offset;
+}
+
+void tik_set_size(tik_context* ctx, u32 size)
+{
+	ctx->size = size;
+}
+
+void tik_set_usersettings(tik_context* ctx, settings* usersettings)
+{
+	ctx->usersettings = usersettings;
+}
+
+void tik_get_decrypted_titlekey(tik_context* ctx, u8 decryptedkey[0x10])
+{
+	memcpy(decryptedkey, ctx->titlekey, 16);
+}
+
+void tik_get_titleid(tik_context* ctx, u8 titleid[8])
+{
+	memcpy(titleid, ctx->tik.title_id, 8);
+}
+
+void tik_get_iv(tik_context* ctx, u8 iv[16])
+{
+	memset(iv, 0, 16);
+	memcpy(iv, ctx->tik.title_id, 8);
+}
+
+void tik_decrypt_titlekey(tik_context* ctx, u8 decryptedkey[0x10]) 
+{
+	u8 iv[16];
+	u8* key = settings_get_common_key(ctx->usersettings);
+
+	memset(decryptedkey, 0, 0x10);
+
+	if (!key)
+	{
+		fprintf(stdout, "Warning, could not read common key.\n");
+	}
+	else
+	{
+		memset(iv, 0, 0x10);
+		memcpy(iv, ctx->tik.title_id, 8);
+
+		ctr_init_cbc_decrypt(&ctx->aes, key, iv);
+		ctr_decrypt_cbc(&ctx->aes, ctx->tik.encrypted_title_key, decryptedkey, 0x10);
+	}
+}
+
+void tik_process(tik_context* ctx, u32 actions)
+{
+	if (ctx->size < sizeof(eticket))
+	{
+		fprintf(stderr, "Error, ticket size too small\n");
+		goto clean;
+	}
+
+	fseek(ctx->file, ctx->offset, SEEK_SET);
+	fread((u8*)&ctx->tik, 1, sizeof(eticket), ctx->file);
+
+	tik_decrypt_titlekey(ctx, ctx->titlekey);
+
+	if (actions & InfoFlag)
+	{
+		tik_print(ctx); 
+	}
+
+clean:
+	return;
+}
+
+void tik_print(tik_context* ctx)
+{
+	int i;
+	eticket* tik = &ctx->tik;
+
+	fprintf(stdout, "\nTicket content:\n");
+	fprintf(stdout,
+		"Signature Type:         %08x\n"
+		"Issuer:                 %s\n",
+		getle32(tik->sig_type), tik->issuer
+	);
+
+	fprintf(stdout, "Signature:\n");
+	hexdump(tik->signature, 0x100);
+	fprintf(stdout, "\n");
+
+	memdump(stdout, "Encrypted Titlekey:     ", tik->encrypted_title_key, 0x10);
+	
+	if (settings_get_common_key(ctx->usersettings))
+		memdump(stdout, "Decrypted Titlekey:     ", ctx->titlekey, 0x10);
+
+	memdump(stdout,	"Ticket ID:              ", tik->ticket_id, 0x08);
+	fprintf(stdout, "Ticket Version:         %d\n", getle16(tik->ticket_version));
+	memdump(stdout,	"Title ID:               ", tik->title_id, 0x08);
+	fprintf(stdout, "Common Key Index:       %d\n", tik->commonkey_idx);
+
+	fprintf(stdout, "Content permission map:\n");
+	for(i = 0; i < 0x40; i++) {
+		printf(" %02x", tik->content_permissions[i]);
+
+		if ((i+1) % 8 == 0)
+			printf("\n");
+	}
+	printf("\n");
+}