omg public key derivation works, signing still suck

contrib/backends/srndv2/src/srnd/crypto_test.go

@@ -9,6 +9,30 @@ import (
 	"testing"
 )
 
+const asdKey = "3c7850617b4fe116c98f4ed4a2eaf00ab219d16dd6351d9ee786f9fc710bad55"
+
+func TestSeedToKeypair(t *testing.T) {
+	seed := parseTripcodeSecret("asd")
+	pk, _ := naclSeedToKeyPair(seed)
+	hexpk := hexify(pk)
+	if hexpk != asdKey {
+		t.Logf("%s != %s", asdKey, hexpk)
+		t.Fail()
+	}
+}
+
+func TestSign(t *testing.T) {
+
+	msgid := "<wut@wut.wut>"
+	seed := randbytes(32)
+	pk, sec := naclSeedToKeyPair(seed)
+	sig := msgidFrontendSign(sec, msgid)
+	t.Log(sig)
+	if !verifyFrontendSig(hexify(pk), sig, msgid) {
+		t.Fail()
+	}
+}
+
 func TestVerify(t *testing.T) {
 	d := filepath.Join("testdata", "article.test.txt")
 

contrib/backends/srndv2/src/srnd/cryptography.go

@@ -4,7 +4,7 @@ package srnd
 
 import (
 	"crypto/sha512"
-	"golang.org/x/crypto/curve25519"
+	"edwards25519"
 	"golang.org/x/crypto/ed25519"
 )
 
@@ -21,16 +21,14 @@ func naclCryptoSignFucky(hash, sk []byte) []byte {
 }
 
 func naclSeedToKeyPair(seed []byte) (pk, sk []byte) {
-	h := sha512.Sum512(seed)
+
+	h := sha512.Sum512(seed[0:32])
 	sk = h[:]
 	sk[0] &= 248
-	sk[31] &= 127
+	sk[31] &= 63
 	sk[31] |= 64
-
 	// scalarmult magick shit
-	pk = scalarBaseMult(sk)
-
-	copy(sk[0:32], seed[0:32])
+	pk = scalarBaseMult(sk[0:32])
 	copy(sk[32:64], pk[0:32])
 
 	return
@@ -39,8 +37,10 @@ func naclSeedToKeyPair(seed []byte) (pk, sk []byte) {
 func scalarBaseMult(sk []byte) (pk []byte) {
 	var skey [32]byte
 	var pkey [32]byte
-	copy(skey[0:32], sk[0:32])
-	curve25519.ScalarBaseMult(&pkey, &skey)
-	pk = pkey[0:32]
+	copy(skey[:], sk[0:32])
+	var h edwards25519.ExtendedGroupElement
+	edwards25519.GeScalarMultBase(&h, &skey)
+	h.ToBytes(&pkey)
+	pk = pkey[:]
 	return
 }

contrib/backends/srndv2/src/srnd/vendor/edwards25519/BUILD.bazel

@@ -0,0 +1,10 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "const.go",
+        "edwards25519.go",
+    ],
+    visibility = ["//sign:__subpackages__"],
+)

contrib/backends/srndv2/src/srnd/vendor/edwards25519/LICENSE

@@ -0,0 +1,27 @@
+Copyright (c) 2017 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

contrib/backends/srndv2/src/srnd/vendor/edwards25519/readme.txt

@@ -0,0 +1 @@
+cloned from https://github.com/kevinburke/nacl/commit/38707d146a0b97e13e5de807a3ad62a933f7668c