From 8f91c777559748fa6e857d9fc1f4ae079a532813 Mon Sep 17 00:00:00 2001
From: Christopher Speller <crspeller@gmail.com>
Date: Mon, 3 Oct 2016 16:03:15 -0400
Subject: Adding ability to serve TLS directly from Mattermost server (#4119)

---
 .../xenolf/lego/providers/dns/dnsimple/dnsimple.go | 141 +++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100644 vendor/github.com/xenolf/lego/providers/dns/dnsimple/dnsimple.go

(limited to 'vendor/github.com/xenolf/lego/providers/dns/dnsimple/dnsimple.go')

diff --git a/vendor/github.com/xenolf/lego/providers/dns/dnsimple/dnsimple.go b/vendor/github.com/xenolf/lego/providers/dns/dnsimple/dnsimple.go
new file mode 100644
index 000000000..c903a35ce
--- /dev/null
+++ b/vendor/github.com/xenolf/lego/providers/dns/dnsimple/dnsimple.go
@@ -0,0 +1,141 @@
+// Package dnsimple implements a DNS provider for solving the DNS-01 challenge
+// using dnsimple DNS.
+package dnsimple
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/weppos/dnsimple-go/dnsimple"
+	"github.com/xenolf/lego/acme"
+)
+
+// DNSProvider is an implementation of the acme.ChallengeProvider interface.
+type DNSProvider struct {
+	client *dnsimple.Client
+}
+
+// NewDNSProvider returns a DNSProvider instance configured for dnsimple.
+// Credentials must be passed in the environment variables: DNSIMPLE_EMAIL
+// and DNSIMPLE_API_KEY.
+func NewDNSProvider() (*DNSProvider, error) {
+	email := os.Getenv("DNSIMPLE_EMAIL")
+	key := os.Getenv("DNSIMPLE_API_KEY")
+	return NewDNSProviderCredentials(email, key)
+}
+
+// NewDNSProviderCredentials uses the supplied credentials to return a
+// DNSProvider instance configured for dnsimple.
+func NewDNSProviderCredentials(email, key string) (*DNSProvider, error) {
+	if email == "" || key == "" {
+		return nil, fmt.Errorf("DNSimple credentials missing")
+	}
+
+	return &DNSProvider{
+		client: dnsimple.NewClient(key, email),
+	}, nil
+}
+
+// Present creates a TXT record to fulfil the dns-01 challenge.
+func (c *DNSProvider) Present(domain, token, keyAuth string) error {
+	fqdn, value, ttl := acme.DNS01Record(domain, keyAuth)
+
+	zoneID, zoneName, err := c.getHostedZone(domain)
+	if err != nil {
+		return err
+	}
+
+	recordAttributes := c.newTxtRecord(zoneName, fqdn, value, ttl)
+	_, _, err = c.client.Domains.CreateRecord(zoneID, *recordAttributes)
+	if err != nil {
+		return fmt.Errorf("DNSimple API call failed: %v", err)
+	}
+
+	return nil
+}
+
+// CleanUp removes the TXT record matching the specified parameters.
+func (c *DNSProvider) CleanUp(domain, token, keyAuth string) error {
+	fqdn, _, _ := acme.DNS01Record(domain, keyAuth)
+
+	records, err := c.findTxtRecords(domain, fqdn)
+	if err != nil {
+		return err
+	}
+
+	for _, rec := range records {
+		_, err := c.client.Domains.DeleteRecord(rec.DomainId, rec.Id)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (c *DNSProvider) getHostedZone(domain string) (string, string, error) {
+	zones, _, err := c.client.Domains.List()
+	if err != nil {
+		return "", "", fmt.Errorf("DNSimple API call failed: %v", err)
+	}
+
+	authZone, err := acme.FindZoneByFqdn(acme.ToFqdn(domain), acme.RecursiveNameservers)
+	if err != nil {
+		return "", "", err
+	}
+
+	var hostedZone dnsimple.Domain
+	for _, zone := range zones {
+		if zone.Name == acme.UnFqdn(authZone) {
+			hostedZone = zone
+		}
+	}
+
+	if hostedZone.Id == 0 {
+		return "", "", fmt.Errorf("Zone %s not found in DNSimple for domain %s", authZone, domain)
+
+	}
+
+	return fmt.Sprintf("%v", hostedZone.Id), hostedZone.Name, nil
+}
+
+func (c *DNSProvider) findTxtRecords(domain, fqdn string) ([]dnsimple.Record, error) {
+	zoneID, zoneName, err := c.getHostedZone(domain)
+	if err != nil {
+		return nil, err
+	}
+
+	var records []dnsimple.Record
+	result, _, err := c.client.Domains.ListRecords(zoneID, "", "TXT")
+	if err != nil {
+		return records, fmt.Errorf("DNSimple API call has failed: %v", err)
+	}
+
+	recordName := c.extractRecordName(fqdn, zoneName)
+	for _, record := range result {
+		if record.Name == recordName {
+			records = append(records, record)
+		}
+	}
+
+	return records, nil
+}
+
+func (c *DNSProvider) newTxtRecord(zone, fqdn, value string, ttl int) *dnsimple.Record {
+	name := c.extractRecordName(fqdn, zone)
+
+	return &dnsimple.Record{
+		Type:    "TXT",
+		Name:    name,
+		Content: value,
+		TTL:     ttl,
+	}
+}
+
+func (c *DNSProvider) extractRecordName(fqdn, domain string) string {
+	name := acme.UnFqdn(fqdn)
+	if idx := strings.Index(name, "."+domain); idx != -1 {
+		return name[:idx]
+	}
+	return name
+}
-- 
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