Port crypt package

crypt.go

@@ -0,0 +1,53 @@
+package main
+
+// #include <stdlib.h>
+// #include "types.h"
+import "C"
+import (
+	"unsafe"
+
+	"github.com/rwinkhart/libmutton/crypt"
+	"github.com/rwinkhart/rcw/wrappers"
+)
+
+// TODO investigate username+password only entries still having blank lines at the end when decrypted
+
+// DecryptFileToSlice returns:
+// r0: err
+//
+// r1: decLines (pointer to C-allocated array)
+//
+// r2: length decLines array
+//
+//export DecryptFileToSlice
+func DecryptFileToSlice(realPath, rcwPassword C.PascalString) (*C.char, *C.PascalString, C.int) {
+	lines, err := crypt.DecryptFileToSlice(C.GoStringN(realPath.data, realPath.len), []byte(C.GoStringN(rcwPassword.data, rcwPassword.len)))
+	if err != nil {
+		return C.CString(err.Error()), nil, 0
+	}
+
+	if len(lines) == 0 {
+		return nil, nil, 0
+	}
+
+	// allocate C array for PascalStrings
+	cLinesPtr := (*C.PascalString)(C.malloc(C.size_t(len(lines)) * C.size_t(C.sizeof_PascalString)))
+
+	// populate the array with the decrypted lines
+	cLinesSlice := (*[1 << 30]C.PascalString)(unsafe.Pointer(cLinesPtr))[:len(lines):len(lines)]
+	for i, line := range lines {
+		cLinesSlice[i] = getPascalString(line)
+	}
+
+	return nil, cLinesPtr, C.int(len(lines))
+}
+
+// EncryptBytes returns:
+// encBytes
+//
+//export EncryptBytes
+func EncryptBytes(decBytes, rcwPassword C.PascalString) C.PascalString {
+	// use wrappers.Encrypt directly since C bindings do no support the RCWD daemon
+	encBytes := wrappers.Encrypt([]byte(C.GoStringN(decBytes.data, decBytes.len)), []byte(C.GoStringN(rcwPassword.data, rcwPassword.len)))
+	return getPascalStringFromBytes(encBytes)
+}