From 5310f1a9007ff0f1688cc974407e446448f06c5a Mon Sep 17 00:00:00 2001
From: infinicore <infinicore@protonmail.com>
Date: Fri, 22 Jul 2016 06:24:18 +0000
Subject: [PATCH] Add support for ps:ps#GenerateRandomBytes.

---
 libctru/include/3ds/services/ps.h |  7 +++++++
 libctru/source/services/ps.c      | 15 +++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/libctru/include/3ds/services/ps.h b/libctru/include/3ds/services/ps.h
index 398e7fd..4d17fee 100644
--- a/libctru/include/3ds/services/ps.h
+++ b/libctru/include/3ds/services/ps.h
@@ -74,3 +74,10 @@ Result PS_GetLocalFriendCodeSeed(u64* seed);
  * @param device_id Pointer to write the device ID to.
  */
 Result PS_GetDeviceId(u32* device_id);
+
+/**
+ * @brief Generates cryptographically secure random bytes.
+ * @param out Pointer to the buffer to write the bytes to.
+ * @param len Number of bytes to write.
+ */
+Result PS_GenerateRandomBytes(void* out, size_t len);
diff --git a/libctru/source/services/ps.c b/libctru/source/services/ps.c
index f866ac8..ab8520e 100644
--- a/libctru/source/services/ps.c
+++ b/libctru/source/services/ps.c
@@ -103,3 +103,18 @@ Result PS_GetDeviceId(u32* device_id)
 
 	return (Result)cmdbuf[1];
 }
+
+Result PS_GenerateRandomBytes(void* out, size_t len)
+{
+	Result ret = 0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = IPC_MakeHeader(0xD,1,2); // 0xD0042
+	cmdbuf[1] = len;
+	cmdbuf[2] = IPC_Desc_Buffer(len, IPC_BUFFER_W);
+	cmdbuf[3] = (u32)out;
+
+	if(R_FAILED(ret = svcSendSyncRequest(psHandle)))return ret;
+
+	return (Result)cmdbuf[1];
+}