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/utils.h

@@ -1,7 +1,22 @@
 #pragma once
+#include "aes.h"
+#include "sha1.h"
 
+// Auxiliary functions (endian swap and xor).
 u16 swap16(u16 i);
 u32 swap32(u32 i);
 u64 swap64(u64 i);
+void xor(unsigned char *dest, unsigned char *src1, unsigned char *src2, int size);
+
+// Hex string conversion auxiliary functions.
 u64 hex_to_u64(const char* hex_str);
-void hex_to_bytes(unsigned char *data, const char *hex_str);
+void hex_to_bytes(unsigned char *data, const char *hex_str);
+
+// Crypto functions (AES128-CBC, AES128-ECB, SHA1-HMAC and AES-CMAC).
+void aescbc128_decrypt(unsigned char *key, unsigned char *iv, unsigned char *in, unsigned char *out, int len);
+void aesecb128_encrypt(unsigned char *key, unsigned char *in, unsigned char *out);
+bool hmac_hash_compare(unsigned char *key, int key_len, unsigned char *in, int in_len, unsigned char *hash);
+bool cmac_hash_compare(unsigned char *key, int key_len, unsigned char *in, int in_len, unsigned char *hash);
+
+// Reverse-engineered custom Lempel–Ziv–Markov based compression (unknown variant of LZRC).
+int lz_decompress(unsigned char *out, unsigned char *in, unsigned int size);