From 503a6637b8294aeb8e5e5546f8acbd2b3d6c4744 Mon Sep 17 00:00:00 2001
From: FChannel <>
Date: Sat, 30 Apr 2022 22:17:32 -0700
Subject: first steps in posting connected. can make reply with no quote or
 quote OP do not recommend working on this branch for the time being since
 things are being moved around a lot

---
 post/tripcode.go | 116 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 post/tripcode.go

(limited to 'post/tripcode.go')

diff --git a/post/tripcode.go b/post/tripcode.go
new file mode 100644
index 0000000..3b7e48b
--- /dev/null
+++ b/post/tripcode.go
@@ -0,0 +1,116 @@
+package post
+
+import (
+	"bytes"
+	"regexp"
+	"strings"
+
+	"github.com/FChannel0/FChannel-Server/config"
+	"github.com/gofiber/fiber/v2"
+	_ "github.com/lib/pq"
+	"github.com/simia-tech/crypt"
+	"golang.org/x/text/encoding/japanese"
+	"golang.org/x/text/transform"
+)
+
+const SaltTable = "" +
+	"................................" +
+	".............../0123456789ABCDEF" +
+	"GABCDEFGHIJKLMNOPQRSTUVWXYZabcde" +
+	"fabcdefghijklmnopqrstuvwxyz....." +
+	"................................" +
+	"................................" +
+	"................................" +
+	"................................"
+
+func TripCode(pass string) (string, error) {
+	pass = TripCodeConvert(pass)
+
+	var salt [2]rune
+
+	s := []rune(pass + "H..")[1:3]
+
+	for i, r := range s {
+		salt[i] = rune(SaltTable[r%256])
+	}
+
+	enc, err := crypt.Crypt(pass, "$1$"+string(salt[:]))
+	if err != nil {
+		return "", err
+	}
+
+	// normally i would just return error here but if the encrypt fails, this operation may fail and as a result cause a panic
+	return enc[len(enc)-10 : len(enc)], nil
+}
+
+func TripCodeSecure(pass string) (string, error) {
+	pass = TripCodeConvert(pass)
+
+	enc, err := crypt.Crypt(pass, "$1$"+config.Salt)
+	if err != nil {
+		return "", err
+	}
+
+	return enc[len(enc)-10 : len(enc)], nil
+}
+
+func TripCodeConvert(str string) string {
+	var s bytes.Buffer
+
+	transform.NewWriter(&s, japanese.ShiftJIS.NewEncoder()).Write([]byte(str))
+
+	re := strings.NewReplacer(
+		"&", "&amp;",
+		"\"", "&quot;",
+		"<", "&lt;",
+		">", "&gt;",
+	)
+
+	return re.Replace(s.String())
+}
+
+func CreateNameTripCode(ctx *fiber.Ctx) (string, string, error) {
+	// TODO: to allow this to compile, this will fail for the case of the admin
+	// this can be easily fixed when the rest of the code gets converted to fiber
+
+	input := ctx.FormValue("name")
+
+	tripSecure := regexp.MustCompile("##(.+)?")
+
+	if tripSecure.MatchString(input) {
+		chunck := tripSecure.FindString(input)
+		chunck = strings.Replace(chunck, "##", "", 1)
+
+		//ce := regexp.MustCompile(`(?i)Admin`)
+		//admin := ce.MatchString(chunck)
+
+		//board, modcred := GetPasswordFromSession(r)
+
+		//if admin && HasAuth(modcred, board) {
+		//	return tripSecure.ReplaceAllString(input, ""), "#Admin"
+		//}
+
+		hash, err := TripCodeSecure(chunck)
+		return tripSecure.ReplaceAllString(input, ""), "!!" + hash, err
+	}
+
+	trip := regexp.MustCompile("#(.+)?")
+
+	if trip.MatchString(input) {
+		chunck := trip.FindString(input)
+		chunck = strings.Replace(chunck, "#", "", 1)
+
+		//ce := regexp.MustCompile(`(?i)Admin`)
+		//admin := ce.MatchString(chunck)
+		//board, modcred := GetPasswordFromSession(r)
+
+		//if admin && HasAuth(db, modcred, board) {
+		//	return trip.ReplaceAllString(input, ""), "#Admin"
+		//}
+
+		hash, err := TripCode(chunck)
+		return trip.ReplaceAllString(input, ""), "!" + hash, err
+	}
+
+	return input, "", nil
+}
-- 
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