dkforest

commit 18943a6fddf7dfcaf4a573af453fbe78f4661b43
parent 93fd0d2d578822a7acb314a30d5c98fdda9e6799
Author: n0tr1v <n0tr1v@protonmail.com>
Date:   Fri, 27 Jan 2023 22:31:20 -0800

if we send a clearsign file to @0, return information about the signature

Diffstat:
M
pkg/web/handlers/api/v1/slashInterceptor.go
 | 
37
+++++++++++++++++++++++++++++++++++++

1 file changed, 37 insertions(+), 0 deletions(-)
diff --git a/pkg/web/handlers/api/v1/slashInterceptor.go b/pkg/web/handlers/api/v1/slashInterceptor.go
@@ -7,9 +7,13 @@ import (
 	dutils "dkforest/pkg/database/utils"
 	"dkforest/pkg/managers"
 	"dkforest/pkg/utils"
+	"encoding/hex"
 	"errors"
 	"fmt"
+	"github.com/ProtonMail/go-crypto/openpgp/clearsign"
+	"github.com/ProtonMail/go-crypto/openpgp/packet"
 	"github.com/asaskevich/govalidator"
+	"github.com/dustin/go-humanize"
 	"github.com/sirupsen/logrus"
 	"sort"
 	"strconv"
@@ -960,6 +964,39 @@ func handlePm0(c *Command, msg string) (handled bool) {
 		c.zeroProcMsg(c.message)
 		c.err = ErrRedirect
 		return true
+
+	} else if c.upload != nil {
+
+		// If we sent a clearsign file to @0, the bot will reply with information about the signature
+		if c.upload.FileSize < config.MaxFileSizeBeforeDownload {
+			if file, err := database.GetUploadByFileName(c.upload.FileName); err == nil {
+				if _, by, err := file.GetContent(); err == nil {
+					if b, _ := clearsign.Decode(by); b != nil {
+						if p, err := packet.Read(b.ArmoredSignature.Body); err == nil {
+							if sig, ok := p.(*packet.Signature); ok {
+								fp := strings.ToUpper(hex.EncodeToString(sig.IssuerFingerprint))
+								fpFmt := fmt.Sprintf("%s %s %s %s %s  %s %s %s %s %s",
+									fp[0:4], fp[4:8], fp[8:12], fp[12:16], fp[16:20],
+									fp[20:24], fp[24:28], fp[28:32], fp[32:36], fp[36:40])
+								msg := fmt.Sprintf("<br />"+
+									"File: %s (%s)<br />"+
+									"Signature made: %s<br />"+
+									"Fingerprint: %s<br />"+
+									"Issuer: %s",
+									c.upload.OrigFileName,
+									humanize.Bytes(uint64(c.upload.FileSize)),
+									sig.CreationTime.Format(time.RFC1123),
+									fpFmt,
+									utils.Ternary(sig.SignerUserId != nil, *sig.SignerUserId, "n/a"))
+								c.zeroMsg(msg)
+								c.err = ErrRedirect
+								return true
+							}
+						}
+					}
+				}
+			}
+		}
 	}
 
 	zeroUser := c.getZeroUser()