From 6888be615ac5ed3db612651829b6c5c076f8eaba Mon Sep 17 00:00:00 2001
From: Aaron Bieber <aaron@bolddaemon.com>
Date: Tue, 22 Dec 2020 07:31:45 -0700
Subject: [PATCH] +pgp key lookup tool

---
 plugins/pgp.go     | 87 ++++++++++++++++++++++++++++++++++++++++++++++
 plugins/plugins.go |  3 +-
 2 files changed, 89 insertions(+), 1 deletion(-)
 create mode 100644 plugins/pgp.go

diff --git a/plugins/pgp.go b/plugins/pgp.go
new file mode 100644
index 0000000..1463063
--- /dev/null
+++ b/plugins/pgp.go
@@ -0,0 +1,87 @@
+package plugins
+
+import (
+	"encoding/hex"
+	"fmt"
+	"net/http"
+	"net/url"
+	"regexp"
+	"strings"
+
+	"github.com/matrix-org/gomatrix"
+	"golang.org/x/crypto/openpgp"
+)
+
+// PGP is our plugin type
+type PGP struct {
+}
+
+// SetStore is the setup function for a plugin
+func (p *PGP) SetStore(s PluginStore) {
+}
+
+// Descr describes this plugin
+func (p *PGP) Descr() string {
+	return "Queries keys.openpgp.org"
+}
+
+// Re is what our pgp request matches
+func (p *PGP) Re() string {
+	return `(?i)^pgp: (.+@.+\..+)$`
+}
+
+// Match checks for "pgp: " messages
+func (p *PGP) Match(_, msg string) bool {
+	re := regexp.MustCompile(p.Re())
+	return re.MatchString(msg)
+}
+
+func (p *PGP) fix(msg string) string {
+	re := regexp.MustCompile(p.Re())
+	return re.ReplaceAllString(msg, "$1")
+}
+
+// RespondText to looking up of PGP info
+func (p *PGP) RespondText(c *gomatrix.Client, ev *gomatrix.Event, _, post string) error {
+	search := p.fix(post)
+	escSearch, err := url.Parse(search)
+	if err != nil {
+		return err
+	}
+
+	u := fmt.Sprintf("https://keys.openpgp.org//vks/v1/by-email/%s",
+		escSearch)
+
+	resp, err := http.Get(u)
+	if err != nil {
+		_ = SendText(c, ev.RoomID, fmt.Sprintf("Can't search keys.openpgp.org: %s", err))
+		return err
+	}
+
+	defer resp.Body.Close()
+
+	kr, err := openpgp.ReadArmoredKeyRing(resp.Body)
+	if err != nil {
+		_ = SendText(c, ev.RoomID, fmt.Sprintf("Can't parse key ring: %s", err))
+		return err
+	}
+
+	var ids []string
+	var fps []string
+	for _, entity := range kr {
+		for _, i := range entity.Identities {
+			ids = append(ids, fmt.Sprintf("- %q", i.Name))
+		}
+		fps = append(fps, fmt.Sprintf("**Fingerprint**: %s",
+			hex.EncodeToString(entity.PrimaryKey.Fingerprint[:])))
+	}
+
+	return SendMD(c, ev.RoomID, fmt.Sprintf("%s\n\n%s",
+		strings.Join(ids, "\n"),
+		strings.Join(fps, "\n")))
+}
+
+// Name PGP!
+func (p *PGP) Name() string {
+	return "PGP"
+}
diff --git a/plugins/plugins.go b/plugins/plugins.go
index c6d1515..5e5a617 100644
--- a/plugins/plugins.go
+++ b/plugins/plugins.go
@@ -243,13 +243,14 @@ var Plugs = Plugins{
 	&Hi{},
 	&LoveYou{},
 	&OpenBSDMan{},
+	&PGP{},
 	&Palette{},
+	&RFC{},
 	&Snap{},
 	&Source{},
 	&Thanks{},
 	&Toki{},
 	&Version{},
 	&Wb{},
-	&RFC{},
 	&Weather{},
 }