First installment of RPCS3's custom crypto engine:

- Removed all scetool dependencies;
- Implemented a key vault to manage PS3 keys internally;
- Implemented SELF decryption;
- Improved PKG handling.

Notes:
- NPDRM SELF files (EBOOT.BIN) can also be decrypted. A valid matching RAP file must be placed under the dev_usb000 folder.
- The source code is considerably commented and several debugging functions were also added in order to aid anyone who wishes to contribute to the engine.

rpcs3/Crypto/utils.cpp

@@ -0,0 +1,71 @@
+#include "stdafx.h"
+#include "utils.h"
+
+// Endian swap auxiliary functions.
+u16 swap16(u16 i)
+{
+	return ((i & 0xFF00) >>  8) | ((i & 0xFF) << 8);
+}
+
+u32 swap32(u32 i)
+{
+	return ((i & 0xFF000000) >> 24) | ((i & 0xFF0000) >>  8) | ((i & 0xFF00) <<  8) | ((i & 0xFF) << 24);
+}
+
+u64 swap64(u64 i)
+{
+	return ((i & 0x00000000000000ff) << 56) | ((i & 0x000000000000ff00) << 40) |
+		((i & 0x0000000000ff0000) << 24) | ((i & 0x00000000ff000000) <<  8) |
+		((i & 0x000000ff00000000) >>  8) | ((i & 0x0000ff0000000000) >> 24) |
+		((i & 0x00ff000000000000) >> 40) | ((i & 0xff00000000000000) >> 56);
+}
+
+// Hex string conversion auxiliary functions.
+u64 hex_to_u64(const char* hex_str)
+{
+	u32 length = strlen(hex_str);
+	u64 tmp = 0;
+	u64 result = 0;
+	char c;
+
+	while (length--)
+	{
+		c = *hex_str++;
+		if((c >= '0') && (c <= '9'))
+			tmp = c - '0';
+		else if((c >= 'a') && (c <= 'f'))
+			tmp = c - 'a' + 10;
+		else if((c >= 'A') && (c <= 'F'))
+			tmp = c - 'A' + 10;
+		else
+			tmp = 0;
+		result |= (tmp << (length * 4));
+	}
+
+	return result;
+}
+
+void hex_to_bytes(unsigned char *data, const char *hex_str)
+{
+	u32 str_length = strlen(hex_str);
+	u32 data_length = str_length / 2;
+	char tmp_buf[3] = {0, 0, 0};
+
+	// Don't convert if the string length is odd.
+	if (!(str_length % 2))
+	{
+		u8 *out = (u8 *) malloc (str_length * sizeof(u8));
+		u8 *pos = out;
+
+		while (str_length--)
+		{
+			tmp_buf[0] = *hex_str++;
+			tmp_buf[1] = *hex_str++;
+
+			*pos++ = (u8)(hex_to_u64(tmp_buf) & 0xFF);
+		}
+
+		// Copy back to our array.
+		memcpy(data, out, data_length);
+	}
+}