Fix docker style cert loading.

The certs dir parsing was skipping over files instead of reading them,
as such the certs would never load.

It was also stating the file name rather than the full path for cert
pairs.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>

remotes/docker/config/hosts_test.go

@@ -20,7 +20,9 @@ import (
 	"bytes"
 	"context"
 	"fmt"
+	"io/ioutil"
 	"net/http"
+	"os"
 	"path/filepath"
 	"testing"
 
@@ -190,6 +192,87 @@ ca = "/etc/path/default"
 	}
 }
 
+func TestLoadCertFiles(t *testing.T) {
+	dir, err := ioutil.TempDir("", t.Name())
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(dir)
+
+	type testCase struct {
+		input hostConfig
+	}
+	cases := map[string]testCase{
+		"crt only": {
+			input: hostConfig{host: "testing.io", caCerts: []string{filepath.Join(dir, "testing.io", "ca.crt")}},
+		},
+		"crt and cert pair": {
+			input: hostConfig{
+				host:    "testing.io",
+				caCerts: []string{filepath.Join(dir, "testing.io", "ca.crt")},
+				clientPairs: [][2]string{
+					{
+						filepath.Join(dir, "testing.io", "client.cert"),
+						filepath.Join(dir, "testing.io", "client.key"),
+					},
+				},
+			},
+		},
+		"cert pair only": {
+			input: hostConfig{
+				host: "testing.io",
+				clientPairs: [][2]string{
+					{
+						filepath.Join(dir, "testing.io", "client.cert"),
+						filepath.Join(dir, "testing.io", "client.key"),
+					},
+				},
+			},
+		},
+	}
+
+	for name, tc := range cases {
+		t.Run(name, func(t *testing.T) {
+
+			hostDir := filepath.Join(dir, tc.input.host)
+			if err := os.MkdirAll(hostDir, 0700); err != nil {
+				t.Fatal(err)
+			}
+			defer os.RemoveAll(hostDir)
+
+			for _, f := range tc.input.caCerts {
+				if err := ioutil.WriteFile(f, testKey, 0600); err != nil {
+					t.Fatal(err)
+				}
+			}
+
+			for _, pair := range tc.input.clientPairs {
+				if err := ioutil.WriteFile(pair[0], testKey, 0600); err != nil {
+					t.Fatal(err)
+				}
+				if err := ioutil.WriteFile(pair[1], testKey, 0600); err != nil {
+					t.Fatal(err)
+				}
+			}
+
+			configs, err := loadHostDir(context.Background(), hostDir)
+			if err != nil {
+				t.Fatal(err)
+			}
+			if len(configs) != 1 {
+				t.Fatalf("\nexpected:\n%+v\ngot:\n%+v", tc.input, configs)
+			}
+
+			cfg := configs[0]
+			cfg.host = tc.input.host
+
+			if !compareHostConfig(cfg, tc.input) {
+				t.Errorf("\nexpected:\n%+v:\n\ngot:\n%+v", tc.input, cfg)
+			}
+		})
+	}
+}
+
 func compareRegistryHost(j, k docker.RegistryHost) bool {
 	if j.Scheme != k.Scheme {
 		return false
@@ -283,3 +366,35 @@ func printHostConfig(hc []hostConfig) string {
 	}
 	return b.String()
 }
+
+var (
+	testKey = []byte(`-----BEGIN PRIVATE KEY-----
+	MIIEvwIBADANBgkqhkiG9w0BAQEFAASCBKkwggSlAgEAAoIBAQDa+zvPgFXwra4S
+	0DzEWRgZHxVTDG1sJsnN/jOaHCNpRyABGVW5kdei9WFWv3dpiELI+guQMjdUL++w
+	M68bs6cXKW+1nW6u5uWuGwklOwkoKoeHkkn/vHef7ybk+5qdk6AYY0DKQsrBBOvj
+	f0WAnG+1xi8VIOEBmce0/47MexOiuILVkjokgdmDCOc8ShkT6/EJTCsI1wDew/4G
+	9IiRzw2xSM0ZATAtEC3HEBRLJGWZQtuKlLCuzJ+erOWUcg2cjnSgR3PmaAXE//5g
+	SoeqEbtTo1satf9AR4VvreIAI8m0eyo8ABMLTkZovEFcUUHetL63hdqItjCeRfrQ
+	zK4LMRFbAgMBAAECggEBAJtP6UHo0gtcA8SQMSlJz4+xvhwjClDUyfjyPIMnRe5b
+	ZdWhtG1jhT+tLhaqwfT1kfidcCobk6aAQU4FukK5jt8cooB7Yo9mcKylvDzNvFbi
+	ozGCjj113JpwsnNiCG2O0NO7Qa6y5L810GCQWik3yvtvzuD7atsJyN0VDKD3Ahw7
+	1X8z76grZFlhVMCTAA3vAJ2y2p3sd+TGC/PIhnsvChwxEorGCnMj93mBaUI7zZRY
+	EZhlk4ZvC9sUvlVUuYC+wAHjasgN9s3AzsOBSx+Xt3NaXQHzhL0mVo/vu/pjjFBs
+	WBLR1PBoIfveTJPOp+Hrr4cuCK0NuX9sWlWPYLl5A2ECgYEA5fq3n4PhbJ2BuTS5
+	AVgOmjRpk1eogb6aSY+cx7Mr++ADF9EYXc5tgKoUsDeeiiyK2lv6IKavoTWT1kdd
+	shiclyEzp2CxG5GtbC/g2XHiBLepgo1fjfev3btCmIeGVBjglOx4F3gEsRygrAID
+	zcz94m2I+uqLT8hvWnccIqScglkCgYEA88H2ji4Nvx6TmqCLcER0vNDVoxxDfgGb
+	iohvenD2jmmdTnezTddsgECAI8L0BPNS/0vBCduTjs5BqhKbIfQvuK5CANMUcxuQ
+	twWH8kPvTYJVgsmWP6sSXSz3PohWC5EA9xACExGtyN6d7sLUCV0SBhjlcgMvGuDM
+	lP6NjyyWctMCgYBKdfGr+QQsqZaNw48+6ybXMK8aIKCTWYYU2SW21sEf7PizZmTQ
+	Qnzb0rWeFHQFYsSWTH9gwPdOZ8107GheuG9C02IpCDpvpawTwjC31pKKWnjMpz9P
+	9OkBDpdSUVbhtahJL4L2fkpumck/x+s5X+y3uiVGsFfovgmnrbbzVH7ECQKBgQCC
+	MYs7DaYR+obkA/P2FtozL2esIyB5YOpu58iDIWrPTeHTU2PVo8Y0Cj9m2m3zZvNh
+	oFiOp1T85XV1HVL2o7IJdimSvyshAAwfdTjTUS2zvHVn0bwKbZj1Y1r7b15l9yEI
+	1OgGv16O9zhrmmweRDOoRgvnBYRXWtJqkjuRyULiOQKBgQC/lSYigV32Eb8Eg1pv
+	7OcPWv4qV4880lRE0MXuQ4VFa4+pqvdziYFYQD4jDYJ4IX9l//bsobL0j7z0P0Gk
+	wDFti9bRwRoO1ntqoA8n2pDLlLRGl0dyjB6fHzp27oqtyf1HRlHiow7Gqx5b5JOk
+	tycYKwA3DuaSyqPe6MthLneq8w==
+	-----END PRIVATE KEY-----
+	`)
+)