Use platform-specific implementations of securePtrOverwriteAndFree

0.go

@@ -97,10 +97,4 @@ func safeBoolDeref(b *bool) bool {
 	return *b
 }
 
-// securePtrOverwrite securely overwrites the memory at the input pointer and then frees it.
-func securePtrOverwriteAndFree(input unsafe.Pointer, length C.int) {
-	C.explicit_bzero(input, C.size_t(length))
-	C.free(input)
-}
-
 func main() {}

0_generic.go

@@ -0,0 +1,14 @@
+//go:build !ios
+
+package main
+
+// #include <string.h>
+// #include <stdlib.h>
+import "C"
+import "unsafe"
+
+// securePtrOverwriteAndFree securely overwrites the memory at the input pointer and then frees it.
+func securePtrOverwriteAndFree(input unsafe.Pointer, length C.size_t) {
+	C.explicit_bzero(input, C.size_t(length))
+	C.free(input)
+}

0_ios.go

@@ -0,0 +1,14 @@
+//go:build ios
+
+package main
+
+// #include <string.h>
+// #include <stdlib.h>
+import "C"
+import "unsafe"
+
+// securePtrOverwriteAndFree securely overwrites the memory at the input pointer and then frees it.
+func securePtrOverwriteAndFree(input unsafe.Pointer, length C.size_t) {
+	C.memset_s(input, length, 0, length)
+	C.free(input)
+}

privkey.go

@@ -20,7 +20,7 @@ import (
 func SetPrivKeyDataAndEraseFreeInput(privKeyData C.PascalString) {
 	privKeyDataPtr := unsafe.Pointer(privKeyData.data)
 	privkey.SetBytes(C.GoBytes(privKeyDataPtr, privKeyData.len))
-	securePtrOverwriteAndFree(privKeyDataPtr, privKeyData.len)
+	securePtrOverwriteAndFree(privKeyDataPtr, C.size_t(privKeyData.len))
 	FreePascalString(privKeyData)
 }
 
@@ -46,6 +46,6 @@ func GetPrivKeyDataAndEraseGoCopy() C.PascalString {
 //
 //export EraseFreePrivKeyPascal
 func EraseFreePrivKeyPascal(privKeyPascal C.PascalString) {
-	securePtrOverwriteAndFree(unsafe.Pointer(privKeyPascal.data), privKeyPascal.len)
+	securePtrOverwriteAndFree(unsafe.Pointer(privKeyPascal.data), C.size_t(privKeyPascal.len))
 	FreePascalString(privKeyPascal)
 }