Add bcrypt prng functions (#1608)

generation/WinSDK/documentationMappings.rsp

@@ -74924,7 +74924,7 @@ PROCESSOR_POWER_POLICY_INFO=[Documentation("https://docs.microsoft.com/windows/w
 PROCESSOR_RELATIONSHIP=[Documentation("https://docs.microsoft.com/windows/win32/api/winnt/ns-winnt-processor_relationship")]
 ProcessPendingGameUI=[Documentation("https://docs.microsoft.com/windows/win32/api/gamingtcui/nf-gamingtcui-processpendinggameui")]
 ProcessPointerFramesInteractionContext=[Documentation("https://docs.microsoft.com/windows/win32/api/interactioncontext/nf-interactioncontext-processpointerframesinteractioncontext")]
-ProcessPrng=[Documentation("https://docs.microsoft.com/windows/win32/SecCNG/processprng")]
+ProcessPrng=[Documentation("https://docs.microsoft.com/windows/win32/seccng/processprng")]
 ProcessQuadTessFactorsAvg=[Documentation("https://docs.microsoft.com/windows/win32/direct3dhlsl/processquadtessfactorsavg")]
 ProcessQuadTessFactorsMax=[Documentation("https://docs.microsoft.com/windows/win32/direct3dhlsl/processquadtessfactorsmax")]
 ProcessQuadTessFactorsMin=[Documentation("https://docs.microsoft.com/windows/win32/direct3dhlsl/processquadtessfactorsmin")]
@@ -82644,7 +82644,7 @@ SystemParametersInfo=[Documentation("https://docs.microsoft.com/windows/win32/ap
 SystemParametersInfoA=[Documentation("https://docs.microsoft.com/windows/win32/api/winuser/nf-winuser-systemparametersinfoa")]
 SystemParametersInfoForDpi=[Documentation("https://docs.microsoft.com/windows/win32/api/winuser/nf-winuser-systemparametersinfofordpi")]
 SystemParametersInfoW=[Documentation("https://docs.microsoft.com/windows/win32/api/winuser/nf-winuser-systemparametersinfow")]
-SystemPrng=[Documentation("https://docs.microsoft.com/windows/win32/SecCNG/systemprng")]
+SystemPrng=[Documentation("https://docs.microsoft.com/windows/win32/seccng/systemprng")]
 SystemPropertiesType=[Documentation("https://docs.microsoft.com/windows/win32/WES/eventschema-systempropertiestype-complextype")]
 SystemRestore=[Documentation("https://docs.microsoft.com/windows/win32/sr/systemrestore")]
 SystemRestore::CreationTime=[Documentation("https://docs.microsoft.com/windows/win32/sr/systemrestore")]

generation/WinSDK/manual/Security.Cryptography.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Runtime.InteropServices;
+using Windows.Win32.Foundation.Metadata;
+
+namespace Windows.Win32.Security.Cryptography
+{
+    public static unsafe partial class Apis
+    {
+        // Manually defined due to missing header definitions
+        // https://github.com/microsoft/win32metadata/issues/1605
+
+        [DllImport("BCryptPrimitives.dll", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
+        [return: NativeTypeName("BOOL")]
+        public static extern int SystemPrng([NativeTypeName("PUCHAR")][MemorySize(BytesParamIndex=1)][Out] byte* pbRandomData, [NativeTypeName("SIZE_T")] nuint cbRandomData);
+
+        [DllImport("BCryptPrimitives.dll", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
+        [return: NativeTypeName("BOOL")]
+        public static extern int ProcessPrng([NativeTypeName("PBYTE")][MemorySize(BytesParamIndex=1)][Out] byte* pbData, [NativeTypeName("SIZE_T")] nuint cbData);
+    }
+}

scripts/ChangesSinceLastRelease.txt

@@ -956,3 +956,6 @@ Windows.Win32.Security.Authentication.Identity.SCH_CREDENTIALS added
 Windows.Win32.Security.Authentication.Identity.TLS_PARAMETERS added
 # Mark SHGetPropertyStoreForWindow::ppv as a ComOutPtr
 Windows.Win32.UI.Shell.PropertiesSystem.Apis.SHGetPropertyStoreForWindow : ppv : [Out] => [ComOutPtr,Out]
+# Add missing bcrypt helpers
+Windows.Win32.Security.Cryptography.Apis.ProcessPrng added
+Windows.Win32.Security.Cryptography.Apis.SystemPrng added