Add wrapper

src/romulus_m.go

@@ -0,0 +1,64 @@
+package src
+
+import (
+	"crypto/rand"
+	"errors"
+)
+
+const abytes int = 16
+const keysize int = 16
+const noncesize int = 16
+
+func Encrypt(key []byte, plaintext []byte, additionalData []byte) ([]byte, error) {
+
+	cipher := make([]byte, len(plaintext)+abytes+noncesize)
+	var cipherlen uint64
+	nonce := genNonce()
+	ret := romulus_m_encrypt(
+		cipher[noncesize:],
+		&cipherlen,
+		plaintext,
+		(uint64)(len(plaintext)),
+		additionalData,
+		(uint64)(len(additionalData)),
+		nil,
+		nonce,
+		key[:keysize],
+	)
+
+	if ret != 0 {
+		return nil, errors.New("Failed to decrypt")
+	}
+	copy(cipher, nonce)
+	return cipher[:cipherlen], nil
+}
+
+func Decrypt(key []byte, ciphertext []byte, additionalData []byte) ([]byte, bool, error) {
+
+	plaintext := make([]byte, len(ciphertext))
+	var plaintextLen uint64
+	ret := romulus_m_decrypt(
+		plaintext,
+		&plaintextLen,
+		nil,
+		ciphertext[noncesize:],
+		(uint64)(len(ciphertext)-noncesize),
+		additionalData,
+		(uint64)(len(additionalData)),
+		ciphertext[:noncesize],
+		key[:keysize],
+	)
+	if ret == -1 {
+		return nil, false, errors.New("Failed to authenticate")
+	} else if ret != 0 {
+		return nil, false, errors.New("Failed to decrypt")
+	}
+
+	return plaintext, true, nil
+}
+
+func genNonce() []byte {
+	buf := make([]byte, noncesize)
+	rand.Read(buf)
+	return buf
+}

src/romulus_m_reference.go

@@ -1,5 +1,7 @@
 package src
 
+// Converted to go with C2GO, tweaks by 51m0n - 2022.
+
 /*
  * Date: 05 May 2021
  * Contact: Romulus Team (Mustafa Khairallah - mustafa.khairallah@ntu.edu.sg)
@@ -275,6 +277,7 @@ func romulus_m_encrypt(c []byte, clen *uint64, m []byte, mlen uint64, ad []byte,
 	var xlen uint64
 
 	N = npub
+	// sm
 	mstart := m[:]
 	cstart := c[:]
 	n = 16

src/skinny_reference.go

@@ -1,5 +1,7 @@
 package src
 
+// Converted to go with C2GO, tweaks by 51m0n - 2022.
+
 /*
  * Date: 11 December 2015
  * Contact: Thomas Peyrin - thomas.peyrin@gmail.com