diff --git a/bin/dev_hdd0/home/00000001/exdata/.gitignore b/bin/dev_hdd0/home/00000001/exdata/.gitignore
new file mode 100644
index 0000000000..8f6c3111a2
--- /dev/null
+++ b/bin/dev_hdd0/home/00000001/exdata/.gitignore
@@ -0,0 +1,6 @@
+# Note: This folder has to exist. Once the User Account manager is implemented, make sure it creates this folder in case it's missing and delete this .gitignore file.
+
+# Ignore everything in this directory
+*
+# Except this file
+!.gitignore
diff --git a/rpcs3/Crypto/ec.cpp b/rpcs3/Crypto/ec.cpp
new file mode 100644
index 0000000000..1e8dd23b6e
--- /dev/null
+++ b/rpcs3/Crypto/ec.cpp
@@ -0,0 +1,548 @@
+// Copyright 2007,2008,2010  Segher Boessenkool  <segher@kernel.crashing.org>
+// Licensed under the terms of the GNU GPL, version 2
+// http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
+
+#include "stdafx.h"
+#include "utils.h"
+
+void bn_print(char *name, u8 *a, u32 n)
+{
+	u32 i;
+
+	printf("%s = ", name);
+
+	for (i = 0; i < n; i++)
+		printf("%02x", a[i]);
+
+	printf("\n");
+}
+
+static void bn_zero(u8 *d, u32 n)
+{
+	memset(d, 0, n);
+}
+void bn_copy(u8 *d, u8 *a, u32 n)
+{
+	memcpy(d, a, n);
+}
+
+int bn_compare(u8 *a, u8 *b, u32 n)
+{
+	u32 i;
+
+	for (i = 0; i < n; i++) {
+		if (a[i] < b[i])
+			return -1;
+		if (a[i] > b[i])
+			return 1;
+	}
+
+	return 0;
+}
+
+static u8 bn_add_1(u8 *d, u8 *a, u8 *b, u32 n)
+{
+	u32 i;
+	u32 dig;
+	u8 c;
+
+	c = 0;
+	for (i = n - 1; i < n; i--) {
+		dig = a[i] + b[i] + c;
+		c = dig >> 8;
+		d[i] = dig;
+	}
+
+	return c;
+}
+
+static u8 bn_sub_1(u8 *d, u8 *a, u8 *b, u32 n)
+{
+	u32 i;
+	u32 dig;
+	u8 c;
+
+	c = 1;
+	for (i = n - 1; i < n; i--) {
+		dig = a[i] + 255 - b[i] + c;
+		c = dig >> 8;
+		d[i] = dig;
+	}
+
+	return 1 - c;
+}
+
+void bn_reduce(u8 *d, u8 *N, u32 n)
+{
+	if (bn_compare(d, N, n) >= 0)
+		bn_sub_1(d, d, N, n);
+}
+
+void bn_add(u8 *d, u8 *a, u8 *b, u8 *N, u32 n)
+{
+	if (bn_add_1(d, a, b, n))
+		bn_sub_1(d, d, N, n);
+
+	bn_reduce(d, N, n);
+}
+
+void bn_sub(u8 *d, u8 *a, u8 *b, u8 *N, u32 n)
+{
+	if (bn_sub_1(d, a, b, n))
+		bn_add_1(d, d, N, n);
+}
+
+static const u8 inv256[0x80] = {
+	0x01, 0xab, 0xcd, 0xb7, 0x39, 0xa3, 0xc5, 0xef,
+	0xf1, 0x1b, 0x3d, 0xa7, 0x29, 0x13, 0x35, 0xdf,
+	0xe1, 0x8b, 0xad, 0x97, 0x19, 0x83, 0xa5, 0xcf,
+	0xd1, 0xfb, 0x1d, 0x87, 0x09, 0xf3, 0x15, 0xbf,
+	0xc1, 0x6b, 0x8d, 0x77, 0xf9, 0x63, 0x85, 0xaf,
+	0xb1, 0xdb, 0xfd, 0x67, 0xe9, 0xd3, 0xf5, 0x9f,
+	0xa1, 0x4b, 0x6d, 0x57, 0xd9, 0x43, 0x65, 0x8f,
+	0x91, 0xbb, 0xdd, 0x47, 0xc9, 0xb3, 0xd5, 0x7f,
+	0x81, 0x2b, 0x4d, 0x37, 0xb9, 0x23, 0x45, 0x6f,
+	0x71, 0x9b, 0xbd, 0x27, 0xa9, 0x93, 0xb5, 0x5f,
+	0x61, 0x0b, 0x2d, 0x17, 0x99, 0x03, 0x25, 0x4f,
+	0x51, 0x7b, 0x9d, 0x07, 0x89, 0x73, 0x95, 0x3f,
+	0x41, 0xeb, 0x0d, 0xf7, 0x79, 0xe3, 0x05, 0x2f,
+	0x31, 0x5b, 0x7d, 0xe7, 0x69, 0x53, 0x75, 0x1f,
+	0x21, 0xcb, 0xed, 0xd7, 0x59, 0xc3, 0xe5, 0x0f,
+	0x11, 0x3b, 0x5d, 0xc7, 0x49, 0x33, 0x55, 0xff,
+};
+
+static void bn_mon_muladd_dig(u8 *d, u8 *a, u8 b, u8 *N, u32 n)
+{
+	u32 dig;
+	u32 i;
+
+	u8 z = -(d[n-1] + a[n-1]*b) * inv256[N[n-1]/2];
+
+	dig = d[n-1] + a[n-1]*b + N[n-1]*z;
+	dig >>= 8;
+
+	for (i = n - 2; i < n; i--) {
+		dig += d[i] + a[i]*b + N[i]*z;
+		d[i+1] = dig;
+		dig >>= 8;
+	}
+
+	d[0] = dig;
+	dig >>= 8;
+
+	if (dig)
+		bn_sub_1(d, d, N, n);
+
+	bn_reduce(d, N, n);
+}
+
+void bn_mon_mul(u8 *d, u8 *a, u8 *b, u8 *N, u32 n)
+{
+	u8 t[512];
+	u32 i;
+
+	bn_zero(t, n);
+
+	for (i = n - 1; i < n; i--)
+		bn_mon_muladd_dig(t, a, b[i], N, n);
+
+	bn_copy(d, t, n);
+}
+
+void bn_to_mon(u8 *d, u8 *N, u32 n)
+{
+	u32 i;
+
+	for (i = 0; i < 8*n; i++)
+		bn_add(d, d, d, N, n);
+}
+
+void bn_from_mon(u8 *d, u8 *N, u32 n)
+{
+	u8 t[512];
+
+	bn_zero(t, n);
+	t[n-1] = 1;
+	bn_mon_mul(d, d, t, N, n);
+}
+
+static void bn_mon_exp(u8 *d, u8 *a, u8 *N, u32 n, u8 *e, u32 en)
+{
+	u8 t[512];
+	u32 i;
+	u8 mask;
+
+	bn_zero(d, n);
+	d[n-1] = 1;
+	bn_to_mon(d, N, n);
+
+	for (i = 0; i < en; i++)
+		for (mask = 0x80; mask != 0; mask >>= 1) {
+			bn_mon_mul(t, d, d, N, n);
+			if ((e[i] & mask) != 0)
+				bn_mon_mul(d, t, a, N, n);
+			else
+				bn_copy(d, t, n);
+		}
+}
+
+void bn_mon_inv(u8 *d, u8 *a, u8 *N, u32 n)
+{
+	u8 t[512], s[512];
+
+	bn_zero(s, n);
+	s[n-1] = 2;
+	bn_sub_1(t, N, s, n);
+	bn_mon_exp(d, a, N, n, t, n);
+}
+
+void bn_copy(u8 *d, u8 *a, u32 n);
+int bn_compare(u8 *a, u8 *b, u32 n);
+void bn_reduce(u8 *d, u8 *N, u32 n);
+void bn_add(u8 *d, u8 *a, u8 *b, u8 *N, u32 n);
+void bn_sub(u8 *d, u8 *a, u8 *b, u8 *N, u32 n);
+void bn_to_mon(u8 *d, u8 *N, u32 n);
+void bn_from_mon(u8 *d, u8 *N, u32 n);
+void bn_mon_mul(u8 *d, u8 *a, u8 *b, u8 *N, u32 n);
+void bn_mon_inv(u8 *d, u8 *a, u8 *N, u32 n);
+
+struct point {
+	u8 x[20];
+	u8 y[20];
+};
+
+static u8 ec_p[20];
+static u8 ec_a[20];	// mon
+static u8 ec_b[20];	// mon
+static u8 ec_N[21];
+static struct point ec_G;	// mon
+static struct point ec_Q;	// mon
+static u8 ec_k[21];
+
+static void elt_copy(u8 *d, u8 *a)
+{
+	memcpy(d, a, 20);
+}
+
+static void elt_zero(u8 *d)
+{
+	memset(d, 0, 20);
+}
+
+static int elt_is_zero(u8 *d)
+{
+	u32 i;
+
+	for (i = 0; i < 20; i++)
+		if (d[i] != 0)
+			return 0;
+
+	return 1;
+}
+
+static void elt_add(u8 *d, u8 *a, u8 *b)
+{
+	bn_add(d, a, b, ec_p, 20);
+}
+
+static void elt_sub(u8 *d, u8 *a, u8 *b)
+{
+	bn_sub(d, a, b, ec_p, 20);
+}
+
+static void elt_mul(u8 *d, u8 *a, u8 *b)
+{
+	bn_mon_mul(d, a, b, ec_p, 20);
+}
+
+static void elt_square(u8 *d, u8 *a)
+{
+	elt_mul(d, a, a);
+}
+
+static void elt_inv(u8 *d, u8 *a)
+{
+	u8 s[20];
+	elt_copy(s, a);
+	bn_mon_inv(d, s, ec_p, 20);
+}
+
+static void point_to_mon(struct point *p)
+{
+	bn_to_mon(p->x, ec_p, 20);
+	bn_to_mon(p->y, ec_p, 20);
+}
+
+static void point_from_mon(struct point *p)
+{
+	bn_from_mon(p->x, ec_p, 20);
+	bn_from_mon(p->y, ec_p, 20);
+}
+
+#if 0
+static int point_is_on_curve(u8 *p)
+{
+	u8 s[20], t[20];
+	u8 *x, *y;
+
+	x = p;
+	y = p + 20;
+
+	elt_square(t, x);
+	elt_mul(s, t, x);
+
+	elt_mul(t, x, ec_a);
+	elt_add(s, s, t);
+
+	elt_add(s, s, ec_b);
+
+	elt_square(t, y);
+	elt_sub(s, s, t);
+
+	return elt_is_zero(s);
+}
+#endif
+
+static void point_zero(struct point *p)
+{
+	elt_zero(p->x);
+	elt_zero(p->y);
+}
+
+static int point_is_zero(struct point *p)
+{
+	return elt_is_zero(p->x) && elt_is_zero(p->y);
+}
+
+static void point_double(struct point *r, struct point *p)
+{
+	u8 s[20], t[20];
+	struct point pp;
+	u8 *px, *py, *rx, *ry;
+
+	pp = *p;
+
+	px = pp.x;
+	py = pp.y;
+	rx = r->x;
+	ry = r->y;
+
+	if (elt_is_zero(py)) {
+		point_zero(r);
+		return;
+	}
+
+	elt_square(t, px);	// t = px*px
+	elt_add(s, t, t);	// s = 2*px*px
+	elt_add(s, s, t);	// s = 3*px*px
+	elt_add(s, s, ec_a);	// s = 3*px*px + a
+	elt_add(t, py, py);	// t = 2*py
+	elt_inv(t, t);		// t = 1/(2*py)
+	elt_mul(s, s, t);	// s = (3*px*px+a)/(2*py)
+
+	elt_square(rx, s);	// rx = s*s
+	elt_add(t, px, px);	// t = 2*px
+	elt_sub(rx, rx, t);	// rx = s*s - 2*px
+
+	elt_sub(t, px, rx);	// t = -(rx-px)
+	elt_mul(ry, s, t);	// ry = -s*(rx-px)
+	elt_sub(ry, ry, py);	// ry = -s*(rx-px) - py
+}
+
+static void point_add(struct point *r, struct point *p, struct point *q)
+{
+	u8 s[20], t[20], u[20];
+	u8 *px, *py, *qx, *qy, *rx, *ry;
+	struct point pp, qq;
+
+	pp = *p;
+	qq = *q;
+
+	px = pp.x;
+	py = pp.y;
+	qx = qq.x;
+	qy = qq.y;
+	rx = r->x;
+	ry = r->y;
+
+	if (point_is_zero(&pp)) {
+		elt_copy(rx, qx);
+		elt_copy(ry, qy);
+		return;
+	}
+
+	if (point_is_zero(&qq)) {
+		elt_copy(rx, px);
+		elt_copy(ry, py);
+		return;
+	}
+
+	elt_sub(u, qx, px);
+
+	if (elt_is_zero(u)) {
+		elt_sub(u, qy, py);
+		if (elt_is_zero(u))
+			point_double(r, &pp);
+		else
+			point_zero(r);
+
+		return;
+	}
+
+	elt_inv(t, u);		// t = 1/(qx-px)
+	elt_sub(u, qy, py);	// u = qy-py
+	elt_mul(s, t, u);	// s = (qy-py)/(qx-px)
+
+	elt_square(rx, s);	// rx = s*s
+	elt_add(t, px, qx);	// t = px+qx
+	elt_sub(rx, rx, t);	// rx = s*s - (px+qx)
+
+	elt_sub(t, px, rx);	// t = -(rx-px)
+	elt_mul(ry, s, t);	// ry = -s*(rx-px)
+	elt_sub(ry, ry, py);	// ry = -s*(rx-px) - py
+}
+
+static void point_mul(struct point *d, u8 *a, struct point *b)	// a is bignum
+{
+	u32 i;
+	u8 mask;
+
+	point_zero(d);
+
+	for (i = 0; i < 21; i++)
+		for (mask = 0x80; mask != 0; mask >>= 1) {
+			point_double(d, d);
+			if ((a[i] & mask) != 0)
+				point_add(d, d, b);
+		}
+}
+
+static void generate_ecdsa(u8 *R, u8 *S, u8 *k, u8 *hash)
+{
+	u8 e[21];
+	u8 kk[21];
+	u8 m[21];
+	u8 minv[21];
+	struct point mG;
+
+	e[0] = 0;
+	memcpy(e + 1, hash, 20);
+	bn_reduce(e, ec_N, 21);
+
+try_again:
+	prng(m, 21);
+	m[0] = 0;
+	if (bn_compare(m, ec_N, 21) >= 0)
+		goto try_again;
+
+	//	R = (mG).x
+
+	point_mul(&mG, m, &ec_G);
+	point_from_mon(&mG);
+	R[0] = 0;
+	elt_copy(R+1, mG.x);
+
+	//	S = m**-1*(e + Rk) (mod N)
+
+	bn_copy(kk, k, 21);
+	bn_reduce(kk, ec_N, 21);
+	bn_to_mon(m, ec_N, 21);
+	bn_to_mon(e, ec_N, 21);
+	bn_to_mon(R, ec_N, 21);
+	bn_to_mon(kk, ec_N, 21);
+
+	bn_mon_mul(S, R, kk, ec_N, 21);
+	bn_add(kk, S, e, ec_N, 21);
+	bn_mon_inv(minv, m, ec_N, 21);
+	bn_mon_mul(S, minv, kk, ec_N, 21);
+
+	bn_from_mon(R, ec_N, 21);
+	bn_from_mon(S, ec_N, 21);
+}
+
+static int check_ecdsa(struct point *Q, u8 *R, u8 *S, u8 *hash)
+{
+	u8 Sinv[21];
+	u8 e[21];
+	u8 w1[21], w2[21];
+	struct point r1, r2;
+	u8 rr[21];
+
+	e[0] = 0;
+	memcpy(e + 1, hash, 20);
+	bn_reduce(e, ec_N, 21);
+
+	bn_to_mon(R, ec_N, 21);
+	bn_to_mon(S, ec_N, 21);
+	bn_to_mon(e, ec_N, 21);
+
+	bn_mon_inv(Sinv, S, ec_N, 21);
+
+	bn_mon_mul(w1, e, Sinv, ec_N, 21);
+	bn_mon_mul(w2, R, Sinv, ec_N, 21);
+
+	bn_from_mon(w1, ec_N, 21);
+	bn_from_mon(w2, ec_N, 21);
+
+	point_mul(&r1, w1, &ec_G);
+	point_mul(&r2, w2, Q);
+
+	point_add(&r1, &r1, &r2);
+
+	point_from_mon(&r1);
+
+	rr[0] = 0;
+	memcpy(rr + 1, r1.x, 20);
+	bn_reduce(rr, ec_N, 21);
+
+	bn_from_mon(R, ec_N, 21);
+	bn_from_mon(S, ec_N, 21);
+
+	return (bn_compare(rr, R, 21) == 0);
+}
+
+#if 0
+static void ec_priv_to_pub(u8 *k, u8 *Q)
+{
+	point_mul(Q, k, ec_G);
+}
+#endif
+
+int ecdsa_set_curve(u8* p, u8* a, u8* b, u8* N, u8* Gx, u8* Gy)
+{
+	memcpy(ec_p, p, 20);
+	memcpy(ec_a, a, 20);
+	memcpy(ec_b, b, 20);
+	memcpy(ec_N, N, 21);
+	memcpy(ec_G.x, Gx, 20);
+	memcpy(ec_G.y, Gy, 20);
+	
+	bn_to_mon(ec_a, ec_p, 20);
+	bn_to_mon(ec_b, ec_p, 20);
+
+	point_to_mon(&ec_G);
+
+	return 0;
+} 
+
+void ecdsa_set_pub(u8 *Q)
+{
+	memcpy(ec_Q.x, Q, 20);
+	memcpy(ec_Q.y, Q+20, 20);
+	point_to_mon(&ec_Q);
+}
+
+void ecdsa_set_priv(u8 *k)
+{
+	memcpy(ec_k, k, sizeof ec_k);
+}
+
+int ecdsa_verify(u8 *hash, u8 *R, u8 *S)
+{
+	return check_ecdsa(&ec_Q, R, S, hash);
+}
+
+void ecdsa_sign(u8 *hash, u8 *R, u8 *S)
+{
+	generate_ecdsa(R, S, ec_k, hash);
+}
\ No newline at end of file
diff --git a/rpcs3/Crypto/ec.h b/rpcs3/Crypto/ec.h
new file mode 100644
index 0000000000..6b00f51971
--- /dev/null
+++ b/rpcs3/Crypto/ec.h
@@ -0,0 +1,14 @@
+#pragma once
+
+// Copyright (C) 2014       Hykem <hykem@hotmail.com>
+// Licensed under the terms of the GNU GPL, version 3
+// http://www.gnu.org/licenses/gpl-3.0.txt
+
+#include <string.h>
+#include <stdio.h>
+
+int ecdsa_set_curve(unsigned char *p, unsigned char *a, unsigned char *b, unsigned char *N, unsigned char *Gx, unsigned char *Gy);
+void ecdsa_set_pub(unsigned char *Q);
+void ecdsa_set_priv(unsigned char *k);
+int ecdsa_verify(unsigned char *hash, unsigned char *R, unsigned char *S);
+void ecdsa_sign(unsigned char *hash, unsigned char *R, unsigned char *S);
diff --git a/rpcs3/Crypto/key_vault.cpp b/rpcs3/Crypto/key_vault.cpp
index 5cbc04ac02..04a949c1be 100644
--- a/rpcs3/Crypto/key_vault.cpp
+++ b/rpcs3/Crypto/key_vault.cpp
@@ -8,10 +8,10 @@ SELF_KEY::SELF_KEY(u64 ver, u16 rev, u32 type, const std::string& e, const std::
 	version = ver;
 	revision = rev;
 	self_type = type;
-	hex_to_bytes(erk, e.c_str());
-	hex_to_bytes(riv, r.c_str());
-	hex_to_bytes(pub, pb.c_str());
-	hex_to_bytes(priv, pr.c_str());
+	hex_to_bytes(erk, e.c_str(), 0);
+	hex_to_bytes(riv, r.c_str(), 0);
+	hex_to_bytes(pub, pb.c_str(), 0);
+	hex_to_bytes(priv, pr.c_str(), 0);
 	curve_type = ct;
 }
 
diff --git a/rpcs3/Crypto/key_vault.h b/rpcs3/Crypto/key_vault.h
index e57cfe5b90..293efeda9c 100644
--- a/rpcs3/Crypto/key_vault.h
+++ b/rpcs3/Crypto/key_vault.h
@@ -104,6 +104,35 @@ static u8 EDAT_IV[0x10] = {
 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 };
 
+static u8 VSH_CURVE_P[0x14] = {
+	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
+};
+
+static u8 VSH_CURVE_A[0x14] = {
+	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFC
+};
+
+static u8 VSH_CURVE_B[0x14] = {
+	0xA6, 0x8B, 0xED, 0xC3, 0x34, 0x18, 0x02, 0x9C, 0x1D, 0x3C, 0xE3, 0x3B, 0x9A, 0x32, 0x1F, 0xCC, 0xBB, 0x9E, 0x0F, 0x0B
+};
+
+static u8 VSH_CURVE_N[0x15] = {
+	0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xFF, 0xFF, 0xB5, 0xAE, 0x3C, 0x52, 0x3E, 0x63, 0x94, 0x4F, 0x21, 0x27
+};
+
+static u8 VSH_CURVE_GX[0x14] = {
+	0x12, 0x8E, 0xC4, 0x25, 0x64, 0x87, 0xFD, 0x8F, 0xDF, 0x64, 0xE2, 0x43, 0x7B, 0xC0, 0xA1, 0xF6, 0xD5, 0xAF, 0xDE, 0x2C
+};
+
+static u8 VSH_CURVE_GY[0x14] = {
+	0x59, 0x58, 0x55, 0x7E, 0xB1, 0xDB, 0x00, 0x12, 0x60, 0x42, 0x55, 0x24, 0xDB, 0xC3, 0x79, 0xD5, 0xAC, 0x5F, 0x4A, 0xDF
+};
+
+static u8 VSH_PUB[0x28] = {
+	0x62, 0x27, 0xB0, 0x0A, 0x02, 0x85, 0x6F, 0xB0, 0x41, 0x08, 0x87, 0x67, 0x19, 0xE0, 0xA0, 0x18, 0x32, 0x91, 0xEE, 0xB9,
+	0x6E, 0x73, 0x6A, 0xBF, 0x81, 0xF7, 0x0E, 0xE9, 0x16, 0x1B, 0x0D, 0xDE, 0xB0, 0x26, 0x76, 0x1A, 0xFF, 0x7B, 0xC8, 0x5B
+};
+
 class KeyVault
 {
 	std::vector<SELF_KEY> sk_LV0_arr;
diff --git a/rpcs3/Crypto/lz.cpp b/rpcs3/Crypto/lz.cpp
index ec04981725..86d82d7161 100644
--- a/rpcs3/Crypto/lz.cpp
+++ b/rpcs3/Crypto/lz.cpp
@@ -4,26 +4,20 @@
 
 #include "lz.h"
 
-int decode_range(unsigned int *range, unsigned int *code, unsigned char **src)
+void decode_range(unsigned int *range, unsigned int *code, unsigned char **src)
 {
-	if (!((*range) >> 24))
+	if (!((*range) >> 24)) 
 	{
 		(*range) <<= 8;
 		*code = ((*code) << 8) + (*src)++[5];
-		return 1;
 	}
-	else
-		return 0;
 }
 
 int decode_bit(unsigned int *range, unsigned int *code, int *index, unsigned char **src, unsigned char *c)
 {
-	unsigned int val = *range;
-
-	if (decode_range(range, code, src))
-		val *= (*c);
-	else
-		val = (val >> 8) * (*c);
+	decode_range(range, code, src);
+	
+	unsigned int val = ((*range) >> 8) * (*c);
 
 	*c -= ((*c) >> 3);
 	if (index) (*index) <<= 1;
@@ -47,12 +41,12 @@ int decode_number(unsigned char *ptr, int index, int *bit_flag, unsigned int *ra
 {
 	int i = 1;
 
-	if (index >= 3)
+	if (index >= 3) 
 	{
-		decode_bit(range, code, &i, src, ptr + 0x18);         // Offset 0x978
-		if (index >= 4)
+		decode_bit(range, code, &i, src, ptr + 0x18);
+		if (index >= 4) 
 		{
-			decode_bit(range, code, &i, src, ptr + 0x18);     // Offset 0x978
+			decode_bit(range, code, &i, src, ptr + 0x18);
 			if (index >= 5)
 			{
 				decode_range(range, code, src);
@@ -60,8 +54,8 @@ int decode_number(unsigned char *ptr, int index, int *bit_flag, unsigned int *ra
 				{
 					i <<= 1;
 					(*range) >>= 1;
-					if (*code < *range)
-						i++;
+					if (*code < *range) 
+						i++; 
 					else
 						(*code) -= *range;
 				}
@@ -69,16 +63,16 @@ int decode_number(unsigned char *ptr, int index, int *bit_flag, unsigned int *ra
 		}
 	}
 
-	*bit_flag = decode_bit(range, code, &i, src, ptr);       // Offset 0x960
+	*bit_flag = decode_bit(range, code, &i, src, ptr);
 
-	if (index >= 1)
+	if (index >= 1) 
 	{
-		decode_bit(range, code, &i, src, ptr + 0x8);         // Offset 0x968
-		if (index >= 2)
+		decode_bit(range, code, &i, src, ptr + 0x8);
+		if (index >= 2) 
 		{
-			decode_bit(range, code, &i, src, ptr + 0x10);    // Offset 0x970
+			decode_bit(range, code, &i, src, ptr + 0x10);
 		}
-	}
+	}	
 
 	return i;
 }
@@ -88,12 +82,12 @@ int decode_word(unsigned char *ptr, int index, int *bit_flag, unsigned int *rang
 	int i = 1;
 	index /= 8;
 
-	if (index >= 3)
+	if (index >= 3) 
 	{
-		decode_bit(range, code, &i, src, ptr);          // Offset 0x8A8
-		if (index >= 4)
+		decode_bit(range, code, &i, src, ptr + 4);
+		if (index >= 4) 
 		{
-			decode_bit(range, code, &i, src, ptr);      // Offset 0x8A8
+			decode_bit(range, code, &i, src, ptr + 4);
 			if (index >= 5)
 			{
 				decode_range(range, code, src);
@@ -101,8 +95,8 @@ int decode_word(unsigned char *ptr, int index, int *bit_flag, unsigned int *rang
 				{
 					i <<= 1;
 					(*range) >>= 1;
-					if (*code < *range)
-						i++;
+					if (*code < *range) 
+						i++; 
 					else
 						(*code) -= *range;
 				}
@@ -110,16 +104,16 @@ int decode_word(unsigned char *ptr, int index, int *bit_flag, unsigned int *rang
 		}
 	}
 
-	*bit_flag = decode_bit(range, code, &i, src, ptr + 3);   // Offset 0x8A8 + 3
+	*bit_flag = decode_bit(range, code, &i, src, ptr);
 
-	if (index >= 1)
+	if (index >= 1) 
 	{
-		decode_bit(range, code, &i, src, ptr + 2);           // Offset 0x8A8 + 2
-		if (index >= 2)
+		decode_bit(range, code, &i, src, ptr + 1);
+		if (index >= 2) 
 		{
-			decode_bit(range, code, &i, src, ptr + 1);       // Offset 0x8A8 + 1
+			decode_bit(range, code, &i, src, ptr + 2);
 		}
-	}
+	}	
 
 	return i;
 }
@@ -128,7 +122,7 @@ int decompress(unsigned char *out, unsigned char *in, unsigned int size)
 {
 	int result;
 
-	unsigned char *tmp = new unsigned char[0xA70];
+	unsigned char *tmp = new unsigned char[0xCC8];
 
 	int offset = 0;
 	int bit_flag = 0;
@@ -159,11 +153,11 @@ int decompress(unsigned char *out, unsigned char *in, unsigned int size)
 	else
 	{
 		// Set up a temporary buffer (sliding window).
-		memset(tmp, 0x80, 0xA60);
+		memset(tmp, 0x80, 0xCA8);
 		while (1)
 		{
-			// Start reading at 0x920.
-			tmp_sect1 = tmp + offset + 0x920;
+			// Start reading at 0xB68.
+			tmp_sect1 = tmp + offset + 0xB68;
 			if (!decode_bit(&range, &code, 0, &in, tmp_sect1))  // Raw char.
 			{
 				// Adjust offset and check for stream end.
@@ -189,57 +183,65 @@ int decompress(unsigned char *out, unsigned char *in, unsigned int size)
 				int index = -1;
 
 				// Identify the data length bit field.
-				do {
-					tmp_sect1 += 8;
+				do
+				{
+					tmp_sect1 += 8; 
 					bit_flag = decode_bit(&range, &code, 0, &in, tmp_sect1);
 					index += bit_flag;
 				} while ((bit_flag != 0) && (index < 6));
 
-				// Default block size is 0x40.
-				int b_size = 0x40;
+				// Default block size is 0x160.
+				int b_size = 0x160;
 				tmp_sect2 = tmp + index + 0x7F1;
 
 				// If the data length was found, parse it as a number.
-				if ((index >= 0) || (bit_flag != 0))
+				if ((index >= 0) || (bit_flag != 0)) 
 				{
 					// Locate next section.
-					int sect = (index << 5) | (((((start - out)) << index) & 3) << 3) | (offset & 7);
-					tmp_sect1 = tmp + 0x960 + sect;
+					int sect = (index << 5) | (((((int)(start - out)) << index) & 3) << 3) | (offset & 7);
+					tmp_sect1 = tmp + 0xBA8 + sect;
 
 					// Decode the data length (8 bit fields).
 					data_length = decode_number(tmp_sect1, index, &bit_flag, &range, &code, &in);
-
-					// If we got valid parameters, seek to find data offset.
-					if ((data_length != 3) && ((index > 0) || (bit_flag != 0))) {
-						tmp_sect2 += 0x38;
-						b_size = 0x80;  // Block size is now 0x80.
-					}
-				} else {
+					if (data_length == 0xFF) return (start - out);  // End of stream.		
+				}
+				else 
+				{
 					// Assume one byte of advance.
 					data_length = 1;
 				}
 
+				// If we got valid parameters, seek to find data offset.
+				if ((data_length <= 2))
+				{
+					tmp_sect2 += 0xF8;
+					b_size = 0x40;  // Block size is now 0x40.
+				}
+
 				int diff = 0;
 				int shift = 1;
 
 				// Identify the data offset bit field.
-				do {
+				do
+				{
 					diff = (shift << 4) - b_size;
 					bit_flag = decode_bit(&range, &code, &shift, &in, tmp_sect2 + (shift << 3));
 				} while (diff < 0);
 
 				// If the data offset was found, parse it as a number.
-				if ((diff > 0) || (bit_flag != 0))
+				if ((diff > 0) || (bit_flag != 0)) 
 				{
 					// Adjust diff if needed.
 					if (bit_flag == 0) diff -= 8;
 
 					// Locate section.
-					tmp_sect3 = tmp + 0x8A8 + diff;
+					tmp_sect3 = tmp + 0x928 + diff;
 
 					// Decode the data offset (1 bit fields).
 					data_offset = decode_word(tmp_sect3, diff, &bit_flag, &range, &code, &in);
-				} else {
+				}
+				else
+				{
 					// Assume one byte of advance.
 					data_offset = 1;
 				}
@@ -260,7 +262,8 @@ int decompress(unsigned char *out, unsigned char *in, unsigned int size)
 				offset = ((((int)(buf_end - out)) + 1) & 1) + 6;
 
 				// Copy data.
-				do {
+				do
+				{
 					*start++ = *buf_start++;
 				} while (start < buf_end);
 
@@ -271,4 +274,4 @@ int decompress(unsigned char *out, unsigned char *in, unsigned int size)
 	}
 	delete[] tmp;
 	return result;
-}
+}
\ No newline at end of file
diff --git a/rpcs3/Crypto/lz.h b/rpcs3/Crypto/lz.h
index c27192624c..f84415623d 100644
--- a/rpcs3/Crypto/lz.h
+++ b/rpcs3/Crypto/lz.h
@@ -1,8 +1,15 @@
 #pragma once
+
+// Copyright (C) 2014       Hykem <hykem@hotmail.com>
+// Licensed under the terms of the GNU GPL, version 3
+// http://www.gnu.org/licenses/gpl-3.0.txt
+
+// Reverse-engineered custom Lempel–Ziv–Markov based compression.
+
 #include <string.h>
 
-int decode_range(unsigned int *range, unsigned int *code, unsigned char **src);
+void decode_range(unsigned int *range, unsigned int *code, unsigned char **src);
 int decode_bit(unsigned int *range, unsigned int *code, int *index, unsigned char **src, unsigned char *c);
 int decode_number(unsigned char *ptr, int index, int *bit_flag, unsigned int *range, unsigned int *code, unsigned char **src);
 int decode_word(unsigned char *ptr, int index, int *bit_flag, unsigned int *range, unsigned int *code, unsigned char **src);
-int decompress(unsigned char *out, unsigned char *in, unsigned int size);
+int decompress(unsigned char *out, unsigned char *in, unsigned int size);
\ No newline at end of file
diff --git a/rpcs3/Crypto/sha1.h b/rpcs3/Crypto/sha1.h
index 84d4bd80d2..f616f468b8 100644
--- a/rpcs3/Crypto/sha1.h
+++ b/rpcs3/Crypto/sha1.h
@@ -1,4 +1,5 @@
 #pragma once
+
 /**
  * \file sha1.h
  *
diff --git a/rpcs3/Crypto/unedat.cpp b/rpcs3/Crypto/unedat.cpp
index 7cd9604ac6..21ccd2914f 100644
--- a/rpcs3/Crypto/unedat.cpp
+++ b/rpcs3/Crypto/unedat.cpp
@@ -1,5 +1,4 @@
 #include "stdafx.h"
-#include "utils.h"
 #include "key_vault.h"
 #include "unedat.h"
 #include "Utilities/Log.h"
@@ -7,7 +6,7 @@
 
 void generate_key(int crypto_mode, int version, unsigned char *key_final, unsigned char *iv_final, unsigned char *key, unsigned char *iv)
 {
-	int mode = (int) (crypto_mode & 0xF0000000);
+	int mode = (int)(crypto_mode & 0xF0000000);
 	switch (mode) {
 	case 0x10000000:
 		// Encrypted ERK.
@@ -32,7 +31,7 @@ void generate_key(int crypto_mode, int version, unsigned char *key_final, unsign
 
 void generate_hash(int hash_mode, int version, unsigned char *hash_final, unsigned char *hash)
 {
-	int mode = (int) (hash_mode & 0xF0000000);
+	int mode = (int)(hash_mode & 0xF0000000);
 	switch (mode) {
 	case 0x10000000:
 		// Encrypted HASH.
@@ -52,7 +51,7 @@ void generate_hash(int hash_mode, int version, unsigned char *hash_final, unsign
 	};
 }
 
-bool crypto(int hash_mode, int crypto_mode, int version, unsigned char *in, unsigned char *out, int length, unsigned char *key, unsigned char *iv, unsigned char *hash, unsigned char *test_hash) 
+bool decrypt(int hash_mode, int crypto_mode, int version, unsigned char *in, unsigned char *out, int length, unsigned char *key, unsigned char *iv, unsigned char *hash, unsigned char *test_hash)
 {
 	// Setup buffers for key, iv and hash.
 	unsigned char key_final[0x10] = {};
@@ -77,29 +76,30 @@ bool crypto(int hash_mode, int crypto_mode, int version, unsigned char *in, unsi
 	}
 	else
 	{
-		LOG_ERROR(LOADER, "EDAT: Unknown crypto algorithm!\n");
+		LOG_ERROR(LOADER, "EDAT: Unknown crypto algorithm!");
 		return false;
 	}
-
+	
 	if ((hash_mode & 0xFF) == 0x01) // 0x14 SHA1-HMAC
 	{
-		return hmac_hash_compare(hash_final_14, 0x14, in, length, test_hash);
+		return hmac_hash_compare(hash_final_14, 0x14, in, length, test_hash, 0x14);
 	}
 	else if ((hash_mode & 0xFF) == 0x02)  // 0x10 AES-CMAC
 	{
-		return cmac_hash_compare(hash_final_10, 0x10, in, length, test_hash);
+		return cmac_hash_compare(hash_final_10, 0x10, in, length, test_hash, 0x10);
 	}
 	else if ((hash_mode & 0xFF) == 0x04) //0x10 SHA1-HMAC
 	{
-		return hmac_hash_compare(hash_final_10, 0x10, in, length, test_hash);
+		return hmac_hash_compare(hash_final_10, 0x10, in, length, test_hash, 0x10);
 	}
 	else
 	{
-		LOG_ERROR(LOADER, "EDAT: Unknown hashing algorithm!\n");
+		LOG_ERROR(LOADER, "EDAT: Unknown hashing algorithm!");
 		return false;
 	}
 }
 
+// EDAT/SDAT functions.
 unsigned char* dec_section(unsigned char* metadata)
 {
 	unsigned char *dec = new unsigned char[0x10];
@@ -135,11 +135,11 @@ unsigned char* get_block_key(int block, NPD_HEADER *npd)
 	return dest_key;
 }
 
-// EDAT/SDAT functions.
-int decrypt_data(rFile *in, rFile *out, EDAT_SDAT_HEADER *edat, NPD_HEADER *npd, unsigned char* crypt_key, bool verbose)
+// EDAT/SDAT decryption.
+int decrypt_data(rFile *in, rFile *out, EDAT_HEADER *edat, NPD_HEADER *npd, unsigned char* crypt_key, bool verbose)
 {
 	// Get metadata info and setup buffers.
-	int block_num = (int) ((edat->file_size + edat->block_size - 1) / edat->block_size);
+	int block_num = (int)((edat->file_size + edat->block_size - 1) / edat->block_size);
 	int metadata_section_size = ((edat->flags & EDAT_COMPRESSED_FLAG) != 0 || (edat->flags & EDAT_FLAG_0x20) != 0) ? 0x20 : 0x10;
 	int metadata_offset = 0x100;
 
@@ -148,78 +148,103 @@ int decrypt_data(rFile *in, rFile *out, EDAT_SDAT_HEADER *edat, NPD_HEADER *npd,
 	unsigned char *b_key;
 	unsigned char *iv;
 
+	unsigned char hash[0x10];
+	unsigned char key_result[0x10];
+	unsigned char hash_result[0x14];
+	memset(hash, 0, 0x10);
+	memset(key_result, 0, 0x10);
+	memset(hash_result, 0, 0x14);
+
+	unsigned long long offset = 0;
+	unsigned long long metadata_sec_offset = 0;
+	int length = 0;
+	int compression_end = 0;
 	unsigned char empty_iv[0x10] = {};
 
 	// Decrypt the metadata.
-	for (int i = 0; i < block_num; i++)
+	int i;
+	for (i = 0; i < block_num; i++)
 	{
-		in->Seek(metadata_offset + i * metadata_section_size);
-		unsigned char hash_result[0x10];
-		long offset;
-		int length = 0;
-		int compression_end = 0;
+		memset(hash_result, 0, 0x14);
 
-		if ((edat->flags & EDAT_FLAG_0x04) != 0)
-		{
-			LOG_ERROR(LOADER, "EDAT: Flag 0x04 is not yet supported");
-			return -1;
-		}
-		
 		if ((edat->flags & EDAT_COMPRESSED_FLAG) != 0)
 		{
-			unsigned char metadata[0x20];
-			in->Read(metadata, 0x20);
-			
-			// If the data is compressed, decrypt the metadata.
-			unsigned char *result = dec_section(metadata);
-			offset = ((swap32(*(int*)&result[0]) << 4) | (swap32(*(int*)&result[4])));
-			length = swap32(*(int*)&result[8]);
-			compression_end = swap32(*(int*)&result[12]);
-			delete[] result;
+			metadata_sec_offset = metadata_offset + (unsigned long long) i * metadata_section_size;
+			in->Seek(metadata_sec_offset);
 
+			unsigned char metadata[0x20];
+			memset(metadata, 0, 0x20);
+			in->Read(metadata, 0x20);
+
+			// If the data is compressed, decrypt the metadata.
+			// NOTE: For NPD version 1 the metadata is not encrypted.
+			if (npd->version <= 1)
+			{
+				offset = swap64(*(unsigned long long*)&metadata[0x10]);
+				length = swap32(*(int*)&metadata[0x18]);
+				compression_end = swap32(*(int*)&metadata[0x1C]);
+			}
+			else
+			{
+				unsigned char *result = dec_section(metadata);
+				offset = swap64(*(unsigned long long*)&result[0]);
+				length = swap32(*(int*)&result[8]);
+				compression_end = swap32(*(int*)&result[12]);
+				delete[] result;
+			}
+			
 			memcpy(hash_result, metadata, 0x10);
 		}
 		else if ((edat->flags & EDAT_FLAG_0x20) != 0)
 		{
 			// If FLAG 0x20, the metadata precedes each data block.
-			in->Seek(metadata_offset + i * metadata_section_size + length);
+			metadata_sec_offset = metadata_offset + (unsigned long long) i * (metadata_section_size + length);
+			in->Seek(metadata_sec_offset);
 
 			unsigned char metadata[0x20];
+			memset(metadata, 0, 0x20);
 			in->Read(metadata, 0x20);
+			memcpy(hash_result, metadata, 0x14);
 
 			// If FLAG 0x20 is set, apply custom xor.
-			for (int j = 0; j < 0x10; j++) {
-				hash_result[j] = (unsigned char)(metadata[j] ^ metadata[j+0x10]);
-			}
+			int j;
+			for (j = 0; j < 0x10; j++)
+				hash_result[j] = (unsigned char)(metadata[j] ^ metadata[j + 0x10]);
 
-			offset = metadata_offset + i * edat->block_size + (i + 1) * metadata_section_size;
+			offset = metadata_sec_offset + 0x20;
 			length = edat->block_size;
 
 			if ((i == (block_num - 1)) && (edat->file_size % edat->block_size))
-				length = (int) (edat->file_size % edat->block_size);
+				length = (int)(edat->file_size % edat->block_size);
 		}
 		else
 		{
+			metadata_sec_offset = metadata_offset + (unsigned long long) i * metadata_section_size;
+			in->Seek(metadata_sec_offset);
+
 			in->Read(hash_result, 0x10);
-			offset = metadata_offset + i * edat->block_size + block_num * metadata_section_size;
+			offset = metadata_offset + (unsigned long long) i * edat->block_size + (unsigned long long) block_num * metadata_section_size;
 			length = edat->block_size;
-			
+
 			if ((i == (block_num - 1)) && (edat->file_size % edat->block_size))
-				length = (int) (edat->file_size % edat->block_size);
+				length = (int)(edat->file_size % edat->block_size);
 		}
 
 		// Locate the real data.
 		int pad_length = length;
-		length = (int) ((pad_length + 0xF) & 0xFFFFFFF0);
-		in->Seek(offset);
+		length = (int)((pad_length + 0xF) & 0xFFFFFFF0);
 
 		// Setup buffers for decryption and read the data.
 		enc_data = new unsigned char[length];
 		dec_data = new unsigned char[length];
-		unsigned char key_result[0x10];
-		unsigned char hash[0x10];
+		memset(enc_data, 0, length);
+		memset(dec_data, 0, length);
+		memset(hash, 0, 0x10);
+		memset(key_result, 0, 0x10);
+
+		in->Seek(offset);
 		in->Read(enc_data, length);
-		
+
 		// Generate a key for the current block.
 		b_key = get_block_key(i, npd);
 
@@ -247,7 +272,7 @@ int decrypt_data(rFile *in, rFile *out, EDAT_SDAT_HEADER *edat, NPD_HEADER *npd,
 			hash_mode |= 0x10000000;
 		}
 
-		if ((edat->flags  & EDAT_DEBUG_DATA_FLAG) != 0) 
+		if ((edat->flags  & EDAT_DEBUG_DATA_FLAG) != 0)
 		{
 			// Reset the flags.
 			crypto_mode |= 0x01000000;
@@ -260,7 +285,13 @@ int decrypt_data(rFile *in, rFile *out, EDAT_SDAT_HEADER *edat, NPD_HEADER *npd,
 			// IV is null if NPD version is 1 or 0.
 			iv = (npd->version <= 1) ? empty_iv : npd->digest;
 			// Call main crypto routine on this data block.
-			crypto(hash_mode, crypto_mode, (npd->version == 4), enc_data, dec_data, length, key_result, iv, hash, hash_result);
+			if (!decrypt(hash_mode, crypto_mode, (npd->version == 4), enc_data, dec_data, length, key_result, iv, hash, hash_result))
+			{
+				if (verbose)
+					LOG_WARNING(LOADER, "EDAT: Block at offset 0x%llx has invalid hash!", offset);
+					
+				return 1;
+			}
 		}
 
 		// Apply additional compression if needed and write the decrypted data.
@@ -271,28 +302,28 @@ int decrypt_data(rFile *in, rFile *out, EDAT_SDAT_HEADER *edat, NPD_HEADER *npd,
 			memset(decomp_data, 0, decomp_size);
 
 			if (verbose)
-				LOG_NOTICE(LOADER, "EDAT: Decompressing...\n");
-			
-			int res = lz_decompress(decomp_data, dec_data, decomp_size);
+				LOG_NOTICE(LOADER, "EDAT: Decompressing data...");
+
+			int res = decompress(decomp_data, dec_data, decomp_size);
 			out->Write(decomp_data, res);
-			
+
 			if (verbose)
 			{
-				LOG_NOTICE(LOADER, "EDAT: Compressed block size: %d\n", pad_length);
-				LOG_NOTICE(LOADER, "EDAT: Decompressed block size: %d\n", res);
+				LOG_NOTICE(LOADER, "EDAT: Compressed block size: %d", pad_length);
+				LOG_NOTICE(LOADER, "EDAT: Decompressed block size: %d", res);
 			}
 
 			edat->file_size -= res;
 
-			if (edat->file_size == 0) 
+			if (edat->file_size == 0)
 			{
 				if (res < 0)
 				{
-					LOG_ERROR(LOADER, "EDAT: Decompression failed!\n");
+					LOG_ERROR(LOADER, "EDAT: Decompression failed!");
 					return 1;
 				}
 				else
-					LOG_SUCCESS(LOADER, "EDAT: Data successfully decompressed!\n");
+					LOG_NOTICE(LOADER, "EDAT: Successfully decompressed!");
 			}
 
 			delete[] decomp_data;
@@ -309,158 +340,262 @@ int decrypt_data(rFile *in, rFile *out, EDAT_SDAT_HEADER *edat, NPD_HEADER *npd,
 	return 0;
 }
 
-static bool check_flags(EDAT_SDAT_HEADER *edat, NPD_HEADER *npd)
+int check_data(unsigned char *key, EDAT_HEADER *edat, NPD_HEADER *npd, rFile *f, bool verbose)
 {
-	if (edat == nullptr || npd == nullptr)
-		return false;
+	f->Seek(0);
+	unsigned char header[0xA0];
+	unsigned char empty_header[0xA0];
+	unsigned char header_hash[0x10];
+	unsigned char metadata_hash[0x10];
+	memset(header, 0, 0xA0);
+	memset(empty_header, 0, 0xA0);
+	memset(header_hash, 0, 0x10);
+	memset(metadata_hash, 0, 0x10);
 
-	if (npd->version == 0 || npd->version == 1)
+	// Check NPD version and flags.
+	if ((npd->version == 0) || (npd->version == 1))
 	{
-		if (edat->flags & 0x7EFFFFFE) 
+		if (edat->flags & 0x7EFFFFFE)
 		{
-			LOG_ERROR(LOADER, "EDAT: Bad header flags!\n");
-			return false;
+			LOG_ERROR(LOADER, "EDAT: Bad header flags!");
+			return 1;
 		}
 	}
-	else if (npd->version == 2) 
+	else if (npd->version == 2)
 	{
-		if (edat->flags & 0x7EFFFFE0) 
+		if (edat->flags & 0x7EFFFFE0)
 		{
-			LOG_ERROR(LOADER, "EDAT: Bad header flags!\n");
-			return false;
+			LOG_ERROR(LOADER, "EDAT: Bad header flags!");
+			return 1;
 		}
 	}
-	else if (npd->version == 3 || npd->version == 4)
+	else if ((npd->version == 3) || (npd->version == 4))
 	{
 		if (edat->flags & 0x7EFFFFC0)
 		{
-			LOG_ERROR(LOADER, "EDAT: Bad header flags!\n");
-			return false;
+			LOG_ERROR(LOADER, "EDAT: Bad header flags!");
+			return 1;
 		}
 	}
-	else if (npd->version > 4)
+	else
 	{
-		LOG_ERROR(LOADER, "EDAT: Unknown version - %d\n", npd->version);
-		return false;
-	}
-
-	return true;
-}
-
-int check_data(unsigned char *key, EDAT_SDAT_HEADER *edat, NPD_HEADER *npd, rFile *f, bool verbose)
-{
-	f->Seek(0);
-	unsigned char *header = new unsigned char[0xA0];
-	unsigned char *tmp = new unsigned char[0xA0];
-	unsigned char *hash_result = new unsigned char[0x10];
-
-	// Check NPD version and EDAT flags.
-	if (!check_flags(edat, npd))
-	{
-		delete[] header;
-		delete[] tmp;
-		delete[] hash_result;
-
+		LOG_ERROR(LOADER, "EDAT: Unknown version!");
 		return 1;
 	}
 
 	// Read in the file header.
 	f->Read(header, 0xA0);
-	f->Read(hash_result, 0x10);
+
+	// Read in the header and metadata section hashes.
+	f->Seek(0x90);
+	f->Read(metadata_hash, 0x10);
+	f->Read(header_hash, 0x10);
 
 	// Setup the hashing mode and the crypto mode used in the file.
 	int crypto_mode = 0x1;
 	int hash_mode = ((edat->flags & EDAT_ENCRYPTED_KEY_FLAG) == 0) ? 0x00000002 : 0x10000002;
 	if ((edat->flags & EDAT_DEBUG_DATA_FLAG) != 0)
 	{
-		LOG_ERROR(LOADER, "EDAT: DEBUG data detected!\n");
 		hash_mode |= 0x01000000;
+
+		if (verbose)
+			LOG_WARNING(LOADER, "EDAT: DEBUG data detected!");
 	}
 
 	// Setup header key and iv buffers.
-	unsigned char header_key[0x10] = {};
-	unsigned char header_iv[0x10] = {};
+	unsigned char header_key[0x10];
+	unsigned char header_iv[0x10];
+	memset(header_key, 0, 0x10);
+	memset(header_iv, 0, 0x10);
 
 	// Test the header hash (located at offset 0xA0).
-	if (!crypto(hash_mode, crypto_mode, (npd->version == 4), header, tmp, 0xA0, header_key, header_iv, key, hash_result))
+	if (!decrypt(hash_mode, crypto_mode, (npd->version == 4), header, empty_header, 0xA0, header_key, header_iv, key, header_hash))
 	{
 		if (verbose)
-			LOG_WARNING(LOADER, "EDAT: Header hash is invalid!\n");
+			LOG_WARNING(LOADER, "EDAT: Header hash is invalid!");
+
+		// If the header hash test fails and the data is not DEBUG, then RAP/RIF/KLIC key is invalid.
+		if ((edat->flags & EDAT_DEBUG_DATA_FLAG) != EDAT_DEBUG_DATA_FLAG)
+		{
+			LOG_ERROR(LOADER, "EDAT: RAP/RIF/KLIC key is invalid!");
+			return 1;
+		}
 	}
 
 	// Parse the metadata info.
-	int metadata_section_size = 0x10;
+	int metadata_section_size = ((edat->flags & EDAT_COMPRESSED_FLAG) != 0 || (edat->flags & EDAT_FLAG_0x20) != 0) ? 0x20 : 0x10;
 	if (((edat->flags & EDAT_COMPRESSED_FLAG) != 0))
 	{
-		LOG_WARNING(LOADER, "EDAT: COMPRESSED data detected!\n");
-		metadata_section_size = 0x20;
+		if (verbose)
+			LOG_WARNING(LOADER, "EDAT: COMPRESSED data detected!");
 	}
 
-	int block_num = (int) ((edat->file_size + edat->block_size - 1) / edat->block_size);
-	int bytes_read = 0;
+	int block_num = (int)((edat->file_size + edat->block_size - 1) / edat->block_size);
 	int metadata_offset = 0x100;
+	int metadata_size = metadata_section_size * block_num;
+	long long metadata_section_offset = metadata_offset;
+
+	long bytes_read = 0;
+	long bytes_to_read = metadata_size;
+	unsigned char *metadata = new unsigned char[metadata_size];
+	unsigned char *empty_metadata = new unsigned char[metadata_size];
 
-	long bytes_to_read = metadata_section_size * block_num;
 	while (bytes_to_read > 0)
 	{
 		// Locate the metadata blocks.
-		int block_size = (0x3C00 > bytes_to_read) ? (int) bytes_to_read : 0x3C00;  // 0x3C00 is the maximum block size.
-		f->Seek(metadata_offset + bytes_read);
-		unsigned char *data = new unsigned char[block_size];
+		f->Seek(metadata_section_offset);
 
 		// Read in the metadata.
-		tmp = new unsigned char[block_size];
-		f->Read(data, block_size);
-
-		// Check the generated hash against the metadata hash located at offset 0x90 in the header.
-		memset(hash_result, 0, 0x10);
-		f->Seek(0x90);
-		f->Read(hash_result, 0x10);
-
-		// Generate the hash for this block.
-		if (!crypto(hash_mode, crypto_mode, (npd->version == 4), data, tmp, block_size, header_key, header_iv, key, hash_result))
-		{
-			if (verbose)
-				LOG_WARNING(LOADER, "EDAT: Metadata hash from block 0x%08x is invalid!\n", metadata_offset + bytes_read);
-		}
+		f->Read(metadata + bytes_read, metadata_section_size);
 
 		// Adjust sizes.
-		bytes_read += block_size;
-		bytes_to_read -= block_size;
+		bytes_read += metadata_section_size;
+		bytes_to_read -= metadata_section_size;
 
-		delete[] data;
+		if (((edat->flags & EDAT_FLAG_0x20) != 0)) // Metadata block before each data block.
+			metadata_section_offset += (metadata_section_size + edat->block_size);
+		else
+			metadata_section_offset += metadata_section_size;
+	}
+
+	// Test the metadata section hash (located at offset 0x90).
+	if (!decrypt(hash_mode, crypto_mode, (npd->version == 4), metadata, empty_metadata, metadata_size, header_key, header_iv, key, metadata_hash))
+	{
+		if (verbose)
+			LOG_WARNING(LOADER, "EDAT: Metadata section hash is invalid!");
+	}
+
+	// Checking ECDSA signatures.
+	if ((edat->flags & EDAT_DEBUG_DATA_FLAG) == 0)
+	{
+		LOG_NOTICE(LOADER, "EDAT: Checking signatures...");
+
+		// Setup buffers.
+		unsigned char metadata_signature[0x28];
+		unsigned char header_signature[0x28];
+		unsigned char signature_hash[20];
+		unsigned char signature_r[0x15];
+		unsigned char signature_s[0x15];
+		unsigned char zero_buf[0x15];
+		memset(metadata_signature, 0, 0x28);
+		memset(header_signature, 0, 0x28);
+		memset(signature_hash, 0, 20);
+		memset(signature_r, 0, 0x15);
+		memset(signature_s, 0, 0x15);
+		memset(zero_buf, 0, 0x15);
+
+		// Setup ECDSA curve and public key.
+		ecdsa_set_curve(VSH_CURVE_P, VSH_CURVE_A, VSH_CURVE_B, VSH_CURVE_N, VSH_CURVE_GX, VSH_CURVE_GY);
+		ecdsa_set_pub(VSH_PUB);
+
+
+		// Read in the metadata and header signatures.
+		f->Seek(0xB0);
+		f->Read(metadata_signature, 0x28);
+		f->Seek(0xD8);
+		f->Read(header_signature, 0x28);
+
+		// Checking metadata signature.
+		// Setup signature r and s.
+		memcpy(signature_r + 01, metadata_signature, 0x14);
+		memcpy(signature_s + 01, metadata_signature + 0x14, 0x14);
+		if ((!memcmp(signature_r, zero_buf, 0x15)) || (!memcmp(signature_s, zero_buf, 0x15)))
+			LOG_WARNING(LOADER, "EDAT: Metadata signature is invalid!");
+		else
+		{
+			// Setup signature hash.
+			if ((edat->flags & EDAT_FLAG_0x20) != 0) //Sony failed again, they used buffer from 0x100 with half size of real metadata.
+			{
+				int metadata_buf_size = block_num * 0x10;
+				unsigned char *metadata_buf = new unsigned char[metadata_buf_size];
+				f->Seek(metadata_offset);
+				f->Read(metadata_buf, metadata_buf_size);
+				sha1(metadata_buf, metadata_buf_size, signature_hash);
+				delete[] metadata_buf;
+			}
+			else
+				sha1(metadata, metadata_size, signature_hash);
+
+			if (!ecdsa_verify(signature_hash, signature_r, signature_s))
+			{
+				LOG_WARNING(LOADER, "EDAT: Metadata signature is invalid!");
+				if (((unsigned long long)edat->block_size * block_num) > 0x100000000)
+					LOG_WARNING(LOADER, "EDAT: *Due to large file size, metadata signature status may be incorrect!");
+			}
+			else
+				LOG_NOTICE(LOADER, "EDAT: Metadata signature is valid!");
+		}
+
+
+		// Checking header signature.
+		// Setup header signature r and s.
+		memset(signature_r, 0, 0x15);
+		memset(signature_s, 0, 0x15);
+		memcpy(signature_r + 01, header_signature, 0x14);
+		memcpy(signature_s + 01, header_signature + 0x14, 0x14);
+
+		if ((!memcmp(signature_r, zero_buf, 0x15)) || (!memcmp(signature_s, zero_buf, 0x15)))
+			LOG_WARNING(LOADER, "EDAT: Header signature is invalid!");
+		else
+		{
+			// Setup header signature hash.
+			memset(signature_hash, 0, 20);
+			unsigned char *header_buf = new unsigned char[0xD8];
+			f->Seek(0x00);
+			f->Read(header_buf, 0xD8);
+			sha1(header_buf, 0xD8, signature_hash );
+			delete[] header_buf;
+
+			if (ecdsa_verify(signature_hash, signature_r, signature_s))
+				LOG_NOTICE(LOADER, "EDAT: Header signature is valid!");
+			else
+				LOG_WARNING(LOADER, "EDAT: Header signature is invalid!");
+		}
 	}
 
 	// Cleanup.
-	delete[] header;
-	delete[] tmp;
-	delete[] hash_result;
+	delete[] metadata;
+	delete[] empty_metadata;
 
 	return 0;
 }
 
-void validate_data(const char* file_name, unsigned char *klicensee, NPD_HEADER *npd, bool verbose)
+int validate_npd_hashes(const char* file_name, unsigned char *klicensee, NPD_HEADER *npd, bool verbose)
 {
 	int title_hash_result = 0;
 	int dev_hash_result = 0;
 
-	int file_name_length = (int)strlen(file_name);
+	int file_name_length = (int) strlen(file_name);
 	unsigned char *buf = new unsigned char[0x30 + file_name_length];
+	unsigned char dev[0x60];
 	unsigned char key[0x10];
+	memset(dev, 0, 0x60);
+	memset(key, 0, 0x10);
 
-	// Build the buffer (content_id + file_name).
+	// Build the title buffer (content_id + file_name).
 	memcpy(buf, npd->content_id, 0x30);
 	memcpy(buf + 0x30, file_name, file_name_length);
 
-	// Hash with NP_OMAC_KEY_3 and compare with title_hash.
-	title_hash_result = cmac_hash_compare(NP_OMAC_KEY_3, 0x10, buf, 0x30 + file_name_length, npd->title_hash);
+	// Build the dev buffer (first 0x60 bytes of NPD header in big-endian).
+	memcpy(dev, npd, 0x60);
+
+	// Fix endianness.
+	int version = swap32(npd->version);
+	int license = swap32(npd->license);
+	int type = swap32(npd->type);
+	memcpy(dev + 0x4, &version, 4);
+	memcpy(dev + 0x8, &license, 4);
+	memcpy(dev + 0xC, &type, 4);
+
+	// Hash with NPDRM_OMAC_KEY_3 and compare with title_hash.
+	title_hash_result = cmac_hash_compare(NP_OMAC_KEY_3, 0x10, buf, 0x30 + file_name_length, npd->title_hash, 0x10);
 
 	if (verbose)
 	{
 		if (title_hash_result)
-			LOG_SUCCESS(LOADER, "EDAT: NPD title hash is valid!\n");
-		else 
-			LOG_WARNING(LOADER, "EDAT: NPD title hash is invalid!\n");
+			LOG_NOTICE(LOADER, "EDAT: NPD title hash is valid!");
+		else
+			LOG_WARNING(LOADER, "EDAT: NPD title hash is invalid!");
 	}
 
 	// Check for an empty dev_hash (can't validate if devklic is NULL);
@@ -477,40 +612,45 @@ void validate_data(const char* file_name, unsigned char *klicensee, NPD_HEADER *
 	if (isDevklicEmpty)
 	{
 		if (verbose)
-			LOG_WARNING(LOADER, "EDAT: NPD dev hash is empty!\n");
+			LOG_WARNING(LOADER, "EDAT: NPD dev hash is empty!");
+
+		// Allow empty dev hash.
+		dev_hash_result = 1;
 	}
 	else
 	{
 		// Generate klicensee xor key.
-		xor_(key, klicensee, NP_OMAC_KEY_2, 0x10);
+		xor(key, klicensee, NP_OMAC_KEY_2, 0x10);
 
 		// Hash with generated key and compare with dev_hash.
-		dev_hash_result = cmac_hash_compare(key, 0x10, (unsigned char *)npd, 0x60, npd->dev_hash);
-	
+		dev_hash_result = cmac_hash_compare(key, 0x10, dev, 0x60, npd->dev_hash, 0x10);
+
 		if (verbose)
 		{
 			if (dev_hash_result)
-				LOG_SUCCESS(LOADER, "EDAT: NPD dev hash is valid!\n");
-			else 
-				LOG_WARNING(LOADER, "EDAT: NPD dev hash is invalid!\n");
+				LOG_NOTICE(LOADER, "EDAT: NPD dev hash is valid!");
+			else
+				LOG_WARNING(LOADER, "EDAT: NPD dev hash is invalid!");
 		}
 	}
 
 	delete[] buf;
+
+	return (title_hash_result && dev_hash_result);
 }
 
 bool extract_data(rFile *input, rFile *output, const char* input_file_name, unsigned char* devklic, unsigned char* rifkey, bool verbose)
 {
 	// Setup NPD and EDAT/SDAT structs.
 	NPD_HEADER *NPD = new NPD_HEADER();
-	EDAT_SDAT_HEADER *EDAT = new EDAT_SDAT_HEADER();
+	EDAT_HEADER *EDAT = new EDAT_HEADER();
 
 	// Read in the NPD and EDAT/SDAT headers.
 	char npd_header[0x80];
 	char edat_header[0x10];
-	input->Read(npd_header, 0x80);
-	input->Read(edat_header, 0x10);
-	
+	input->Read(npd_header, sizeof(npd_header));
+	input->Read(edat_header, sizeof(edat_header));
+
 	memcpy(NPD->magic, npd_header, 4);
 	NPD->version = swap32(*(int*)&npd_header[4]);
 	NPD->license = swap32(*(int*)&npd_header[8]);
@@ -523,7 +663,7 @@ bool extract_data(rFile *input, rFile *output, const char* input_file_name, unsi
 	NPD->unk2 = swap64(*(u64*)&npd_header[120]);
 
 	unsigned char npd_magic[4] = {0x4E, 0x50, 0x44, 0x00};  //NPD0
-	if(memcmp(NPD->magic, npd_magic, 4))
+	if (memcmp(NPD->magic, npd_magic, 4))
 	{
 		LOG_ERROR(LOADER, "EDAT: %s has invalid NPD header or already decrypted.", input_file_name);
 		delete NPD;
@@ -537,41 +677,65 @@ bool extract_data(rFile *input, rFile *output, const char* input_file_name, unsi
 
 	if (verbose)
 	{
-		LOG_NOTICE(LOADER, "NPD HEADER\n");
-		LOG_NOTICE(LOADER, "NPD version: %d\n", NPD->version);
-		LOG_NOTICE(LOADER, "NPD license: %d\n", NPD->license);
-		LOG_NOTICE(LOADER, "NPD type: %d\n", NPD->type);
-		LOG_NOTICE(LOADER, "\n");
-		LOG_NOTICE(LOADER, "EDAT HEADER\n");
-		LOG_NOTICE(LOADER, "EDAT flags: 0x%08X\n", EDAT->flags);
-		LOG_NOTICE(LOADER, "EDAT block size: 0x%08X\n", EDAT->block_size);
-		LOG_NOTICE(LOADER, "EDAT file size: 0x%08X\n", EDAT->file_size);
-		LOG_NOTICE(LOADER, "\n");
+		LOG_NOTICE(LOADER, "NPD HEADER");
+		LOG_NOTICE(LOADER, "NPD version: %d", NPD->version);
+		LOG_NOTICE(LOADER, "NPD license: %d", NPD->license);
+		LOG_NOTICE(LOADER, "NPD type: %d", NPD->type);
 	}
 
 	// Set decryption key.
 	unsigned char key[0x10];
 	memset(key, 0, 0x10);
 
-	if((EDAT->flags & SDAT_FLAG) == SDAT_FLAG)
+	// Check EDAT/SDAT flag.
+	if ((EDAT->flags & SDAT_FLAG) == SDAT_FLAG)
 	{
-		LOG_WARNING(LOADER, "EDAT: SDAT detected!\n");
-		xor_(key, NPD->dev_hash, SDAT_KEY, 0x10);
+		if (verbose)
+		{
+			LOG_NOTICE(LOADER, "SDAT HEADER");
+			LOG_NOTICE(LOADER, "SDAT flags: 0x%08X", EDAT->flags);
+			LOG_NOTICE(LOADER, "SDAT block size: 0x%08X", EDAT->block_size);
+			LOG_NOTICE(LOADER, "SDAT file size: 0x%08X", EDAT->file_size);
+		}
+
+		// Generate SDAT key.
+		xor(key, NPD->dev_hash, SDAT_KEY, 0x10);
 	}
 	else
 	{
-		// Perform header validation (optional step).
-		validate_data(input_file_name, devklic, NPD, verbose);
+		if (verbose)
+		{
+			LOG_NOTICE(LOADER, "EDAT HEADER");
+			LOG_NOTICE(LOADER, "EDAT flags: 0x%08X", EDAT->flags);
+			LOG_NOTICE(LOADER, "EDAT block size: 0x%08X", EDAT->block_size);
+			LOG_NOTICE(LOADER, "EDAT file size: 0x%08X", EDAT->file_size);
+		}
 
-		if ((NPD->license & 0x3) == 0x3)      // Type 3: Use supplied devklic.
+		// Perform header validation (EDAT only).
+		char real_file_name[MAX_PATH];
+		extract_file_name(input_file_name, real_file_name);
+		if (!validate_npd_hashes(real_file_name, devklic, NPD, verbose))
+		{
+			// Ignore header validation in DEBUG data.
+			if ((EDAT->flags & EDAT_DEBUG_DATA_FLAG) != EDAT_DEBUG_DATA_FLAG)
+			{
+				LOG_ERROR(LOADER, "EDAT: NPD hash validation failed!");
+				delete NPD;
+				delete EDAT;
+				return 1;
+			}
+		}
+
+		// Select EDAT key.
+		if ((NPD->license & 0x3) == 0x3)           // Type 3: Use supplied devklic.
 			memcpy(key, devklic, 0x10);
-		else if ((NPD->license & 0x2) == 0x2) // Type 2: Use key from RAP file (RIF key).
-		{	
+		else if ((NPD->license & 0x2) == 0x2)      // Type 2: Use key from RAP file (RIF key).
+		{
 			memcpy(key, rifkey, 0x10);
 
 			// Make sure we don't have an empty RIF key.
 			int i, test = 0;
-			for(i = 0; i < 0x10; i++)
+			for (i = 0; i < 0x10; i++)
 			{
 				if (key[i] != 0)
 				{
@@ -579,30 +743,65 @@ bool extract_data(rFile *input, rFile *output, const char* input_file_name, unsi
 					break;
 				}
 			}
-			
+
 			if (!test)
 			{
-				LOG_ERROR(LOADER, "EDAT: A valid RAP file is needed!");
+				LOG_ERROR(LOADER, "EDAT: A valid RAP file is needed for this EDAT file!");
 				delete NPD;
 				delete EDAT;
 				return 1;
 			}
 		}
+		else if ((NPD->license & 0x1) == 0x1)      // Type 1: Use network activation.
+		{
+			LOG_ERROR(LOADER, "EDAT: Network license not supported!");
+			delete NPD;
+			delete EDAT;
+			return 1;
+		}
+
+		if (verbose)
+		{
+			int i;
+			LOG_NOTICE(LOADER, "DEVKLIC: ");
+			for (i = 0; i < 0x10; i++)
+				LOG_NOTICE(LOADER, "%02X", devklic[i]);
+
+			LOG_NOTICE(LOADER, "RIF KEY: ");
+			for (i = 0; i < 0x10; i++)
+				LOG_NOTICE(LOADER, "%02X", rifkey[i]);
+		}
 	}
 
-	LOG_NOTICE(LOADER, "EDAT: Parsing data...\n");
+	if (verbose)
+	{
+		int i;
+		LOG_NOTICE(LOADER, "DECRYPTION KEY: ");
+		for (i = 0; i < 0x10; i++)
+			LOG_NOTICE(LOADER, "%02X", key[i]);
+	}
+
+	LOG_NOTICE(LOADER, "EDAT: Parsing data...");
 	if (check_data(key, EDAT, NPD, input, verbose))
-		LOG_ERROR(LOADER, "EDAT: Data parsing failed!\n");
+	{
+		LOG_ERROR(LOADER, "EDAT: Data parsing failed!");
+		delete NPD;
+		delete EDAT;
+		return 1;
+	}
 	else
-		LOG_SUCCESS(LOADER, "EDAT: Data successfully parsed!\n");
+		LOG_NOTICE(LOADER, "EDAT: Data successfully parsed!");
 
-	printf("\n");
-
-	LOG_NOTICE(LOADER, "EDAT: Decrypting data...\n");
+	LOG_NOTICE(LOADER, "EDAT: Decrypting data...");
 	if (decrypt_data(input, output, EDAT, NPD, key, verbose))
+	{
 		LOG_ERROR(LOADER, "EDAT: Data decryption failed!");
+		delete NPD;
+		delete EDAT;
+		return 1;
+	}
 	else
-		LOG_SUCCESS(LOADER, "EDAT: Data successfully decrypted!");
+		LOG_NOTICE(LOADER, "EDAT: Data successfully decrypted!");
 
 	delete NPD;
 	delete EDAT;
@@ -655,21 +854,21 @@ int DecryptEDAT(const std::string& input_file_name, const std::string& output_fi
 				memcpy(devklic, custom_klic, 0x10);
 			else
 			{
-				LOG_ERROR(LOADER, "EDAT: Invalid custom klic!\n");
+				LOG_ERROR(LOADER, "EDAT: Invalid custom klic!");
 				return -1;
 			}
 
 			break;
 		}
 	default:
-		LOG_ERROR(LOADER, "EDAT: Invalid mode!\n");
+		LOG_ERROR(LOADER, "EDAT: Invalid mode!");
 		return -1;
 	}
 	
 	// Check the input/output files.
 	if (!input.IsOpened() || !output.IsOpened())
 	{
-		LOG_ERROR(LOADER, "EDAT: Failed to open files!\n");
+		LOG_ERROR(LOADER, "EDAT: Failed to open files!");
 		return -1;
 	}
 
@@ -692,11 +891,11 @@ int DecryptEDAT(const std::string& input_file_name, const std::string& output_fi
 		input.Close();
 		output.Close();
 		rRemoveFile(output_file_name);
-		return 0;
+		return -1;
 	}
 	
 	// Cleanup.
 	input.Close();
 	output.Close();
 	return 0;
-}
+}
\ No newline at end of file
diff --git a/rpcs3/Crypto/unedat.h b/rpcs3/Crypto/unedat.h
index 7efc8b3808..f1a9f81ab5 100644
--- a/rpcs3/Crypto/unedat.h
+++ b/rpcs3/Crypto/unedat.h
@@ -1,9 +1,12 @@
 #pragma once
 
+#include <stdio.h>
+#include <string.h>
+#include "utils.h"
+
 #define SDAT_FLAG 0x01000000
 #define EDAT_COMPRESSED_FLAG 0x00000001
 #define EDAT_FLAG_0x02 0x00000002
-#define EDAT_FLAG_0x04 0x00000004
 #define EDAT_ENCRYPTED_KEY_FLAG 0x00000008
 #define EDAT_FLAG_0x10 0x00000010
 #define EDAT_FLAG_0x20 0x00000020
@@ -28,6 +31,6 @@ typedef struct
 	int flags;
 	int block_size;
 	unsigned long long file_size;
-} EDAT_SDAT_HEADER;
+} EDAT_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);
+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);
\ No newline at end of file
diff --git a/rpcs3/Crypto/unself.cpp b/rpcs3/Crypto/unself.cpp
index 61422f5328..67ef26a4b1 100644
--- a/rpcs3/Crypto/unself.cpp
+++ b/rpcs3/Crypto/unself.cpp
@@ -813,10 +813,10 @@ bool SELFDecrypter::GetKeyFromRap(u8 *content_id, u8 *npdrm_key)
 	u8 rap_key[0x10];
 	memset(rap_key, 0, 0x10);
 
-	// Try to find a matching RAP file under dev_usb000.
+	// Try to find a matching RAP file under exdata folder.
 	std::string ci_str((const char *)content_id);
-	// TODO: This shouldn't use current dir
-	std::string rap_path("./dev_usb000/" + ci_str + ".rap");
+	std::string pf_str("00000001");  // TODO: Allow multiple profiles. Use default for now.
+	std::string rap_path("dev_hdd0/home/" + pf_str + "/exdata/" + ci_str + ".rap");
 
 	// Check if we have a valid RAP file.
 	if (!rExists(rap_path))
diff --git a/rpcs3/Crypto/utils.cpp b/rpcs3/Crypto/utils.cpp
index 45a71222e3..8cdf567c88 100644
--- a/rpcs3/Crypto/utils.cpp
+++ b/rpcs3/Crypto/utils.cpp
@@ -1,9 +1,13 @@
-#include "stdafx.h"
-#include "aes.h"
-#include "sha1.h"
-#include "utils.h"
+// Copyright (C) 2014       Hykem <hykem@hotmail.com>
+// Licensed under the terms of the GNU GPL, version 3
+// http://www.gnu.org/licenses/gpl-3.0.txt
 
-// Endian swap auxiliary functions.
+#include "stdafx.h"
+#include "utils.h"
+#include <stdio.h>
+#include <time.h>
+
+// Auxiliary functions (endian swap, xor and prng).
 u16 swap16(u16 i)
 {
 	return ((i & 0xFF00) >>  8) | ((i & 0xFF) << 8);
@@ -22,7 +26,7 @@ u64 swap64(u64 i)
 		((i & 0x00ff000000000000) >> 40) | ((i & 0xff00000000000000) >> 56);
 }
 
-void xor_(unsigned char *dest, unsigned char *src1, unsigned char *src2, int size)
+void xor(unsigned char *dest, unsigned char *src1, unsigned char *src2, int size)
 {
 	int i;
 	for(i = 0; i < size; i++)
@@ -31,10 +35,24 @@ void xor_(unsigned char *dest, unsigned char *src1, unsigned char *src2, int siz
 	}
 }
 
+void prng(unsigned char *dest, int size)
+{
+    unsigned char *buffer = new unsigned char[size];
+	srand((u32)time(0));
+
+	int i;
+	for(i = 0; i < size; i++)
+      buffer[i] = (unsigned char)(rand() & 0xFF);
+
+	memcpy(dest, buffer, size);
+
+	delete[] buffer;
+}
+
 // Hex string conversion auxiliary functions.
 u64 hex_to_u64(const char* hex_str)
 {
-	u32 length = (u32)strlen(hex_str);
+	u32 length = (u32) strlen(hex_str);
 	u64 tmp = 0;
 	u64 result = 0;
 	char c;
@@ -56,19 +74,19 @@ u64 hex_to_u64(const char* hex_str)
 	return result;
 }
 
-void hex_to_bytes(unsigned char *data, const char *hex_str)
+void hex_to_bytes(unsigned char *data, const char *hex_str, unsigned int str_length)
 {
-	u32 str_length = (u32)strlen(hex_str);
-	u32 data_length = str_length / 2;
+	u32 strn_length = (str_length > 0) ? str_length : (u32) strlen(hex_str);
+	u32 data_length = strn_length / 2;
 	char tmp_buf[3] = {0, 0, 0};
 
 	// Don't convert if the string length is odd.
-	if (!(str_length % 2))
+	if (!(strn_length % 2))
 	{
-		u8 *out = (u8 *) malloc (str_length * sizeof(u8));
+		u8 *out = (u8 *)malloc(strn_length * sizeof(u8));
 		u8 *pos = out;
 
-		while (str_length--)
+		while (strn_length--)
 		{
 			tmp_buf[0] = *hex_str++;
 			tmp_buf[1] = *hex_str++;
@@ -81,6 +99,23 @@ void hex_to_bytes(unsigned char *data, const char *hex_str)
 	}
 }
 
+bool is_hex(const char* hex_str, unsigned int str_length)
+{
+    static const char hex_chars[] = "0123456789abcdefABCDEF";
+
+    if (hex_str == NULL)
+        return false;
+
+    unsigned int i;
+    for (i = 0; i < str_length; i++)
+	{
+		if (strchr(hex_chars, hex_str[i]) == 0)
+			return false;
+	}
+
+    return true;
+}
+
 // 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)
 {
@@ -92,6 +127,16 @@ void aescbc128_decrypt(unsigned char *key, unsigned char *iv, unsigned char *in,
 	memset(iv, 0, 0x10);
 }
 
+void aescbc128_encrypt(unsigned char *key, unsigned char *iv, unsigned char *in, unsigned char *out, int len)
+{
+	aes_context ctx;
+	aes_setkey_enc(&ctx, key, 128);
+	aes_crypt_cbc(&ctx, AES_ENCRYPT, len, iv, in, out);
+
+	// Reset the IV.
+	memset(iv, 0, 0x10);
+}
+
 void aesecb128_encrypt(unsigned char *key, unsigned char *in, unsigned char *out)
 {
 	aes_context ctx;
@@ -99,13 +144,13 @@ void aesecb128_encrypt(unsigned char *key, unsigned char *in, unsigned char *out
 	aes_crypt_ecb(&ctx, AES_ENCRYPT, in, out);
 }
 
-bool hmac_hash_compare(unsigned char *key, int key_len, unsigned char *in, int in_len, unsigned char *hash)
+bool hmac_hash_compare(unsigned char *key, int key_len, unsigned char *in, int in_len, unsigned char *hash, int hash_len)
 {
 	unsigned char *out = new unsigned char[key_len];
 
 	sha1_hmac(key, key_len, in, in_len, out);
 
-	for (int i = 0; i < 0x10; i++)
+	for (int i = 0; i < hash_len; i++)
 	{
 		if (out[i] != hash[i])
 		{
@@ -119,7 +164,12 @@ bool hmac_hash_compare(unsigned char *key, int key_len, unsigned char *in, int i
 	return true;
 }
 
-bool cmac_hash_compare(unsigned char *key, int key_len, unsigned char *in, int in_len, unsigned char *hash)
+void hmac_hash_forge(unsigned char *key, int key_len, unsigned char *in, int in_len, unsigned char *hash)
+{
+	sha1_hmac(key, key_len, in, in_len, hash);
+}
+
+bool cmac_hash_compare(unsigned char *key, int key_len, unsigned char *in, int in_len, unsigned char *hash, int hash_len)
 {
 	unsigned char *out = new unsigned char[key_len];
 
@@ -127,7 +177,7 @@ bool cmac_hash_compare(unsigned char *key, int key_len, unsigned char *in, int i
 	aes_setkey_enc(&ctx, key, 128);
 	aes_cmac(&ctx, in_len, in, out);
 
-	for (int i = 0; i < key_len; i++)
+	for (int i = 0; i < hash_len; i++)
 	{
 		if (out[i] != hash[i])
 		{
@@ -141,9 +191,20 @@ bool cmac_hash_compare(unsigned char *key, int key_len, unsigned char *in, int i
 	return true;
 }
 
-#include "lz.h"
-// Reverse-engineered custom Lempel–Ziv–Markov based compression (unknown variant of LZRC).
-int lz_decompress(unsigned char *out, unsigned char *in, unsigned int size)
+void cmac_hash_forge(unsigned char *key, int key_len, unsigned char *in, int in_len, unsigned char *hash)
 {
-	return decompress(out,in,size);
+	aes_context ctx;
+	aes_setkey_enc(&ctx, key, 128);
+	aes_cmac(&ctx, in_len, in, hash);
 }
+
+char* extract_file_name(const char* file_path, char real_file_name[MAX_PATH])
+{
+	size_t file_path_len = strlen(file_path);
+	const char* p = strrchr(file_path, '/');
+	if (!p) p = strrchr(file_path, '\\');
+	if (p) file_path_len = file_path + file_path_len - p - 1;
+	strncpy(real_file_name, p ? (p + 1) : file_path, file_path_len + 1);
+	
+	return real_file_name;
+}
\ No newline at end of file
diff --git a/rpcs3/Crypto/utils.h b/rpcs3/Crypto/utils.h
index 4ae1466607..34041d8645 100644
--- a/rpcs3/Crypto/utils.h
+++ b/rpcs3/Crypto/utils.h
@@ -1,20 +1,35 @@
 #pragma once
 
-// Auxiliary functions (endian swap and xor).
+// Copyright (C) 2014       Hykem <hykem@hotmail.com>
+// Licensed under the terms of the GNU GPL, version 3
+// http://www.gnu.org/licenses/gpl-3.0.txt
+
+#define MAX_PATH _MAX_PATH
+
+#include <stdlib.h>
+#include "aes.h"
+#include "sha1.h"
+#include "lz.h"
+#include "ec.h"
+
+// Auxiliary functions (endian swap, xor, prng and file name).
 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);
+void xor(unsigned char *dest, unsigned char *src1, unsigned char *src2, int size);
+void prng(unsigned char *dest, int size);
+char* extract_file_name(const char* file_path, char real_file_name[MAX_PATH]);
 
 // 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, unsigned int str_length);
+bool is_hex(const char* hex_str, unsigned int str_length);
 
 // 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 aescbc128_encrypt(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);
+bool hmac_hash_compare(unsigned char *key, int key_len, unsigned char *in, int in_len, unsigned char *hash, int hash_len);
+void hmac_hash_forge(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, int hash_len);
+void cmac_hash_forge(unsigned char *key, int key_len, unsigned char *in, int in_len, unsigned char *hash);
\ No newline at end of file
diff --git a/rpcs3/Emu/SysCalls/Modules/sceNp.cpp b/rpcs3/Emu/SysCalls/Modules/sceNp.cpp
index 35c8126587..523c81288f 100644
--- a/rpcs3/Emu/SysCalls/Modules/sceNp.cpp
+++ b/rpcs3/Emu/SysCalls/Modules/sceNp.cpp
@@ -108,8 +108,9 @@ int npDrmIsAvailable(u32 k_licensee_addr, vm::ptr<const char> drm_path)
 
 	// TODO: These shouldn't use current dir
 	std::string enc_drm_path = drm_path.get_ptr();
-	std::string dec_drm_path = "/dev_hdd1/" + titleID + "/" + drm_file_name;
-	std::string rap_path = "/dev_usb000/";
+	std::string dec_drm_path = "/dev_hdd1/cache/" + drm_file_name;
+	std::string pf_str("00000001");  // TODO: Allow multiple profiles. Use default for now.
+	std::string rap_path("../dev_hdd0/home/" + pf_str + "/exdata/");
 
 	// Search dev_usb000 for a compatible RAP file. 
 	vfsDir *raps_dir = new vfsDir(rap_path);
@@ -128,19 +129,19 @@ int npDrmIsAvailable(u32 k_licensee_addr, vm::ptr<const char> drm_path)
 		}
 	}
 
-	// Create a new directory under dev_hdd1/titleID to hold the decrypted data.
-	// TODO: These shouldn't use current dir
-	std::string tmp_dir = "./dev_hdd1/" + titleID;
-	if (!rExists(tmp_dir))
-		rMkdir("./dev_hdd1/" + titleID);
-
 	// Decrypt this EDAT using the supplied k_licensee and matching RAP file.
 	std::string enc_drm_path_local, dec_drm_path_local, rap_path_local;
 	Emu.GetVFS().GetDevice(enc_drm_path, enc_drm_path_local);
 	Emu.GetVFS().GetDevice(dec_drm_path, dec_drm_path_local);
 	Emu.GetVFS().GetDevice(rap_path, rap_path_local);
 
-	DecryptEDAT(enc_drm_path_local, dec_drm_path_local, 8, rap_path_local, k_licensee, false);
+	if (DecryptEDAT(enc_drm_path_local, dec_drm_path_local, 8, rap_path_local, k_licensee, false) >= 0)
+	{
+		// If decryption succeeds, replace the encrypted file with it.
+		rRemoveFile(enc_drm_path_local);
+		rRename(dec_drm_path_local, enc_drm_path_local);
+	}
+
 	return CELL_OK;
 }
 
diff --git a/rpcs3/emucore.vcxproj b/rpcs3/emucore.vcxproj
index 0280445ed3..a37243a656 100644
--- a/rpcs3/emucore.vcxproj
+++ b/rpcs3/emucore.vcxproj
@@ -39,6 +39,7 @@
     <ClCompile Include="..\Utilities\StrFmt.cpp" />
     <ClCompile Include="..\Utilities\Thread.cpp" />
     <ClCompile Include="Crypto\aes.cpp" />
+    <ClCompile Include="Crypto\ec.cpp" />
     <ClCompile Include="Crypto\key_vault.cpp" />
     <ClCompile Include="Crypto\lz.cpp">
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug - MemLeak|Win32'">NotUsing</PrecompiledHeader>
@@ -244,6 +245,7 @@
     <ClInclude Include="..\Utilities\Thread.h" />
     <ClInclude Include="..\Utilities\Timer.h" />
     <ClInclude Include="Crypto\aes.h" />
+    <ClInclude Include="Crypto\ec.h" />
     <ClInclude Include="Crypto\key_vault.h" />
     <ClInclude Include="Crypto\lz.h" />
     <ClInclude Include="Crypto\sha1.h" />
diff --git a/rpcs3/emucore.vcxproj.filters b/rpcs3/emucore.vcxproj.filters
index 907847d5ce..83eee10346 100644
--- a/rpcs3/emucore.vcxproj.filters
+++ b/rpcs3/emucore.vcxproj.filters
@@ -131,7 +131,7 @@
     <ClCompile Include="Emu\SysCalls\Modules\cellAudio.cpp">
       <Filter>Emu\SysCalls\Modules</Filter>
     </ClCompile>
-	<ClCompile Include="Emu\SysCalls\Modules\cellAvconfExt.cpp">
+    <ClCompile Include="Emu\SysCalls\Modules\cellAvconfExt.cpp">
       <Filter>Emu\SysCalls\Modules</Filter>
     </ClCompile>
     <ClCompile Include="Emu\SysCalls\Modules\cellCamera.cpp">
@@ -350,7 +350,7 @@
     <ClCompile Include="Emu\Memory\Memory.cpp">
       <Filter>Emu\Memory</Filter>
     </ClCompile>
-	<ClCompile Include="Emu\Memory\vm.cpp">
+    <ClCompile Include="Emu\Memory\vm.cpp">
       <Filter>Emu\Memory</Filter>
     </ClCompile>
     <ClCompile Include="Loader\ELF.cpp">
@@ -623,6 +623,9 @@
     <ClCompile Include="..\Utilities\rXml.cpp">
       <Filter>Utilities</Filter>
     </ClCompile>
+    <ClCompile Include="Crypto\ec.cpp">
+      <Filter>Crypto</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="Crypto\aes.h">
@@ -727,7 +730,7 @@
     <ClInclude Include="Emu\SysCalls\Modules\cellPamf.h">
       <Filter>Emu\SysCalls\Modules</Filter>
     </ClInclude>
-	<ClInclude Include="Emu\SysCalls\Modules\cellPng.h">
+    <ClInclude Include="Emu\SysCalls\Modules\cellPng.h">
       <Filter>Emu\SysCalls\Modules</Filter>
     </ClInclude>
     <ClInclude Include="Emu\SysCalls\Modules\cellPngDec.h">
@@ -1222,5 +1225,8 @@
     <ClInclude Include="Emu\SysCalls\SyncPrimitivesManager.h">
       <Filter>Emu\SysCalls</Filter>
     </ClInclude>
+    <ClInclude Include="Crypto\ec.h">
+      <Filter>Crypto</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>
\ No newline at end of file