diff --git a/include/arm9/hardware/crypto.h b/include/arm9/hardware/crypto.h
index ea99708..a873e6c 100644
--- a/include/arm9/hardware/crypto.h
+++ b/include/arm9/hardware/crypto.h
@@ -310,4 +310,14 @@
  */
 bool RSA_decrypt2048(void *const decSig, const void *const encSig);
 
-//bool RSA_verify2048(const void *const encSig, const void *const data, u32 size);
+/**
+ * @brief      Verifies a RSA 2048 SHA 256 signature.
+ *
+ * @param[in]  encSig   Pointer to encrypted source signature.
+ * @param[in]  data     Pointer to the data to hash.
+ * @param[in]  size     The hash data size.
+ * @param[in]  keyslot  The RSA keyslot to use. Must be <4.
+ *
+ * @return     Returns true if the signature is valid, false otherwise.
+ */
+bool RSA_verify2048(const u32 *const encSig, const u32 *const data, u32 size, u8 keyslot);
diff --git a/source/arm9/hardware/crypto.c b/source/arm9/hardware/crypto.c
index f32e2f8..2e29c8f 100644
--- a/source/arm9/hardware/crypto.c
+++ b/source/arm9/hardware/crypto.c
@@ -23,6 +23,7 @@
 #include "arm9/hardware/crypto.h"
 #include "arm9/hardware/interrupt.h"
 #include "arm9/hardware/ndma.h"
+#include "arm9/fmt.h"
 
 
 
@@ -674,6 +675,34 @@
 void RSA_init(void)
 {
 	REG_RSA_UNK_F0 = 0;
+
+	/*static const u8 firmRetailmod[256] =
+	{
+		0xDE, 0xCF, 0xB6, 0xFC, 0x3D, 0x33, 0xE9, 0x55, 0xFD, 0xAC, 0x90, 0xE8,
+		0x88, 0x17, 0xB0, 0x03, 0xA1, 0x6B, 0x9A, 0xAB, 0x72, 0x70, 0x79, 0x32,
+		0xA2, 0xA0, 0x8C, 0xBB, 0x33, 0x6F, 0xB0, 0x76, 0x96, 0x2E, 0xC4, 0xE9,
+		0x2E, 0xD8, 0x8F, 0x92, 0xC0, 0x2D, 0x4D, 0x41, 0x0F, 0xDE, 0x45, 0x1B,
+		0x25, 0x3C, 0xBE, 0x37, 0x6B, 0x45, 0x82, 0x21, 0xE6, 0x4D, 0xB1, 0x23,
+		0x81, 0x82, 0xB6, 0x81, 0x62, 0xB7, 0x30, 0xF4, 0x60, 0x4B, 0xC7, 0xF7,
+		0xF0, 0x17, 0x0C, 0xB5, 0x75, 0x88, 0x77, 0x93, 0x52, 0x63, 0x70, 0xF0,
+		0x0B, 0xC6, 0x73, 0x43, 0x41, 0xEE, 0xE4, 0xF0, 0x71, 0xEC, 0xC8, 0xC1,
+		0x32, 0xC4, 0xDC, 0xA9, 0x99, 0x1D, 0x31, 0xB8, 0xA4, 0x7E, 0xDD, 0x19,
+		0x04, 0x0F, 0x02, 0xA8, 0x1A, 0xAF, 0xB3, 0x48, 0x9A, 0x29, 0x29, 0x5E,
+		0x49, 0x84, 0xE0, 0x94, 0x11, 0xD1, 0x7E, 0xAB, 0xB2, 0xC0, 0x44, 0x7E,
+		0xA1, 0x1B, 0x5E, 0x9D, 0x0D, 0x1A, 0xF9, 0x02, 0x9A, 0x2E, 0x53, 0x03,
+		0x2D, 0x48, 0x96, 0x7C, 0x2C, 0xA6, 0xD7, 0xAC, 0xF1, 0xED, 0x2B, 0x18,
+		0xBB, 0x01, 0xCB, 0x13, 0xB9, 0xAC, 0xA6, 0xEE, 0x55, 0x00, 0x37, 0x7C,
+		0x69, 0x61, 0x62, 0x89, 0x01, 0x54, 0x77, 0x9F, 0x07, 0x5D, 0x26, 0x34,
+		0x3A, 0xA9, 0x49, 0xA5, 0xAF, 0xF2, 0x5E, 0x06, 0x51, 0xB7, 0x1C, 0xE0,
+		0xDE, 0xDA, 0x5C, 0x0B, 0x9F, 0x98, 0xC2, 0x15, 0xFD, 0xBA, 0xD8, 0xA9,
+		0x99, 0x00, 0xAB, 0xA4, 0x8E, 0x4A, 0x16, 0x9D, 0x66, 0x2A, 0xE8, 0x56,
+		0x64, 0xB2, 0xB6, 0xC0, 0x93, 0xAF, 0x4D, 0x38, 0xA0, 0x16, 0x5C, 0xE4,
+		0xBD, 0x62, 0xC2, 0x46, 0x6B, 0xC9, 0x5A, 0x59, 0x4A, 0x72, 0x58, 0xFD,
+		0xB2, 0xCC, 0x36, 0x87, 0x30, 0x85, 0xE8, 0xA1, 0x04, 0x5B, 0xE0, 0x17,
+		0x9B, 0xD0, 0xEC, 0x9B
+	};
+
+	RSA_setKey2048(2, firmRetailmod, 0x01000100u);*/
 }
 
 static void rsaWaitBusy(void)
@@ -733,6 +762,38 @@
 	return true;
 }
 
-/*bool RSA_verify2048(const void *const encSig, const void *const data, u32 size)
+bool RSA_verify2048(const u32 *const encSig, const u32 *const data, u32 size, u8 keyslot)
 {
-}*/
+	u8 decSig[0x100];
+	RSA_selectKeyslot(keyslot);
+	if(!RSA_decrypt2048(decSig, encSig)) return false;
+
+	if(decSig[0] != 0x00 || decSig[1] != 0x01) return false;
+
+	u32 read = 2;
+	while(read < 0x100)
+	{
+		if(decSig[read] != 0xFF) break;
+		read++;
+	}
+	if(read != 0xCC || decSig[read] != 0x00) return false;
+
+	// ASN.1 is a clusterfuck so we skip parsing the remaining headers
+	// and hardcode the hash location.
+
+	alignas(4) u8 hash[32];
+	sha(data, size, (u32*)hash, SHA_INPUT_BIG | SHA_MODE_256, SHA_OUTPUT_BIG);
+
+	// Compare hash
+	u8 res = 0;
+	for(u32 i = 0; i < 32; i++)
+	{
+		u8 tmp;
+		if(decSig[0xE0 + i] == hash[i]) tmp = 0;
+		else tmp = 1;
+
+		res |= tmp;
+	}
+
+	return res == 0;
+}
diff --git a/source/arm9/hardware/hardware.c b/source/arm9/hardware/hardware.c
index fc5e321..38ee3ec 100644
--- a/source/arm9/hardware/hardware.c
+++ b/source/arm9/hardware/hardware.c
@@ -32,6 +32,7 @@
 	TIMER_init();
 	PXI_init();
 	AES_init();
+	RSA_init();
 }
 
 void hardwareDeinit(void)