Updated the crypto engine:

- Updated AES and SHA-1 source code;
- Fixed a few code warnings;
- Implemented EDAT/SDAT decryption.

Started SPURS implementation:
- Added an internal SPURSManager class draft;
- Added several drafts for cellSpurs functions.

Implemented key.edat decryption in sceNpDrmIsAvailable:
- NOTE: Currently, the decrypted key.edat is stored under dev_hdd1/titleID and the user must replace this file in dev_hdd0. This behavior will change in the future as it's currently intended for controlled testing only.

rpcs3/Crypto/unedat.h

@@ -0,0 +1,34 @@
+#pragma once
+#include "utils.h"
+#include "key_vault.h"
+
+#define SDAT_FLAG 0x01000000
+#define EDAT_COMPRESSED_FLAG 0x00000001
+#define EDAT_FLAG_0x02 0x00000002
+#define EDAT_ENCRYPTED_KEY_FLAG 0x00000008
+#define EDAT_FLAG_0x10 0x00000010
+#define EDAT_FLAG_0x20 0x00000020
+#define EDAT_DEBUG_DATA_FLAG 0x80000000
+
+typedef struct 
+{
+	unsigned char magic[4];
+    int version;
+    int license;
+    int type;
+    unsigned char content_id[0x30];
+    unsigned char digest[0x10];
+    unsigned char title_hash[0x10];
+    unsigned char dev_hash[0x10];
+    unsigned long long unk1;
+    unsigned long long unk2;
+} NPD_HEADER;
+
+typedef struct 
+{
+	int flags;
+	int block_size;
+	unsigned long long file_size;
+} EDAT_SDAT_HEADER;
+
+int DecryptEDAT(const std::string& input_file_name, const std::string& output_file_name, int mode, const std::string& rap_file_name, unsigned char *custom_klic, bool verbose);