mirror of https://github.com/slackhq/nebula.git
411 lines
17 KiB
Go
411 lines
17 KiB
Go
//go:build !windows
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// +build !windows
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package main
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import (
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"bytes"
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"crypto/rand"
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"errors"
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"os"
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"testing"
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"time"
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"github.com/slackhq/nebula/cert"
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"github.com/stretchr/testify/assert"
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"golang.org/x/crypto/ed25519"
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)
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//TODO: test file permissions
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func Test_signSummary(t *testing.T) {
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assert.Equal(t, "sign <flags>: create and sign a certificate", signSummary())
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}
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func Test_signHelp(t *testing.T) {
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ob := &bytes.Buffer{}
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signHelp(ob)
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assert.Equal(
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t,
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"Usage of "+os.Args[0]+" sign <flags>: create and sign a certificate\n"+
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" -ca-crt string\n"+
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" \tOptional: path to the signing CA cert (default \"ca.crt\")\n"+
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" -ca-key string\n"+
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" \tOptional: path to the signing CA key (default \"ca.key\")\n"+
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" -duration duration\n"+
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" \tOptional: how long the cert should be valid for. The default is 1 second before the signing cert expires. Valid time units are seconds: \"s\", minutes: \"m\", hours: \"h\"\n"+
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" -groups string\n"+
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" \tOptional: comma separated list of groups\n"+
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" -in-pub string\n"+
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" \tOptional (if out-key not set): path to read a previously generated public key\n"+
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" -ip string\n"+
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" \tRequired: ipv4 address and network in CIDR notation to assign the cert\n"+
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" -name string\n"+
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" \tRequired: name of the cert, usually a hostname\n"+
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" -out-crt string\n"+
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" \tOptional: path to write the certificate to\n"+
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" -out-key string\n"+
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" \tOptional (if in-pub not set): path to write the private key to\n"+
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" -out-qr string\n"+
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" \tOptional: output a qr code image (png) of the certificate\n"+
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" -subnets string\n"+
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" \tOptional: comma separated list of ipv4 address and network in CIDR notation. Subnets this cert can serve for\n",
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ob.String(),
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)
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}
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func Test_signCert(t *testing.T) {
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ob := &bytes.Buffer{}
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eb := &bytes.Buffer{}
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nopw := &StubPasswordReader{
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password: []byte(""),
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err: nil,
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}
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errpw := &StubPasswordReader{
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password: []byte(""),
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err: errors.New("stub error"),
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}
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passphrase := []byte("DO NOT USE THIS KEY")
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testpw := &StubPasswordReader{
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password: passphrase,
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err: nil,
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}
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// required args
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assertHelpError(t, signCert(
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[]string{"-ca-crt", "./nope", "-ca-key", "./nope", "-ip", "1.1.1.1/24", "-out-key", "nope", "-out-crt", "nope"}, ob, eb, nopw,
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), "-name is required")
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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assertHelpError(t, signCert(
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[]string{"-ca-crt", "./nope", "-ca-key", "./nope", "-name", "test", "-out-key", "nope", "-out-crt", "nope"}, ob, eb, nopw,
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), "-ip is required")
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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// cannot set -in-pub and -out-key
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assertHelpError(t, signCert(
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[]string{"-ca-crt", "./nope", "-ca-key", "./nope", "-name", "test", "-in-pub", "nope", "-ip", "1.1.1.1/24", "-out-crt", "nope", "-out-key", "nope"}, ob, eb, nopw,
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), "cannot set both -in-pub and -out-key")
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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// failed to read key
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ob.Reset()
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eb.Reset()
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args := []string{"-ca-crt", "./nope", "-ca-key", "./nope", "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", "nope", "-out-key", "nope", "-duration", "100m"}
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assert.EqualError(t, signCert(args, ob, eb, nopw), "error while reading ca-key: open ./nope: "+NoSuchFileError)
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// failed to unmarshal key
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ob.Reset()
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eb.Reset()
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caKeyF, err := os.CreateTemp("", "sign-cert.key")
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assert.Nil(t, err)
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defer os.Remove(caKeyF.Name())
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args = []string{"-ca-crt", "./nope", "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", "nope", "-out-key", "nope", "-duration", "100m"}
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assert.EqualError(t, signCert(args, ob, eb, nopw), "error while parsing ca-key: input did not contain a valid PEM encoded block")
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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// Write a proper ca key for later
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ob.Reset()
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eb.Reset()
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caPub, caPriv, _ := ed25519.GenerateKey(rand.Reader)
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caKeyF.Write(cert.MarshalEd25519PrivateKey(caPriv))
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// failed to read cert
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args = []string{"-ca-crt", "./nope", "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", "nope", "-out-key", "nope", "-duration", "100m"}
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assert.EqualError(t, signCert(args, ob, eb, nopw), "error while reading ca-crt: open ./nope: "+NoSuchFileError)
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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// failed to unmarshal cert
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ob.Reset()
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eb.Reset()
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caCrtF, err := os.CreateTemp("", "sign-cert.crt")
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assert.Nil(t, err)
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defer os.Remove(caCrtF.Name())
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", "nope", "-out-key", "nope", "-duration", "100m"}
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assert.EqualError(t, signCert(args, ob, eb, nopw), "error while parsing ca-crt: input did not contain a valid PEM encoded block")
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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// write a proper ca cert for later
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ca := cert.NebulaCertificate{
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Details: cert.NebulaCertificateDetails{
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Name: "ca",
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NotBefore: time.Now(),
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NotAfter: time.Now().Add(time.Minute * 200),
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PublicKey: caPub,
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IsCA: true,
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},
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}
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b, _ := ca.MarshalToPEM()
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caCrtF.Write(b)
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// failed to read pub
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", "nope", "-in-pub", "./nope", "-duration", "100m"}
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assert.EqualError(t, signCert(args, ob, eb, nopw), "error while reading in-pub: open ./nope: "+NoSuchFileError)
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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// failed to unmarshal pub
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ob.Reset()
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eb.Reset()
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inPubF, err := os.CreateTemp("", "in.pub")
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assert.Nil(t, err)
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defer os.Remove(inPubF.Name())
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", "nope", "-in-pub", inPubF.Name(), "-duration", "100m"}
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assert.EqualError(t, signCert(args, ob, eb, nopw), "error while parsing in-pub: input did not contain a valid PEM encoded block")
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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// write a proper pub for later
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ob.Reset()
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eb.Reset()
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inPub, _ := x25519Keypair()
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inPubF.Write(cert.MarshalX25519PublicKey(inPub))
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// bad ip cidr
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ob.Reset()
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eb.Reset()
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "a1.1.1.1/24", "-out-crt", "nope", "-out-key", "nope", "-duration", "100m"}
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assertHelpError(t, signCert(args, ob, eb, nopw), "invalid ip definition: invalid CIDR address: a1.1.1.1/24")
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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ob.Reset()
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eb.Reset()
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "100::100/100", "-out-crt", "nope", "-out-key", "nope", "-duration", "100m"}
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assertHelpError(t, signCert(args, ob, eb, nopw), "invalid ip definition: can only be ipv4, have 100::100/100")
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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// bad subnet cidr
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ob.Reset()
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eb.Reset()
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", "nope", "-out-key", "nope", "-duration", "100m", "-subnets", "a"}
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assertHelpError(t, signCert(args, ob, eb, nopw), "invalid subnet definition: invalid CIDR address: a")
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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ob.Reset()
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eb.Reset()
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", "nope", "-out-key", "nope", "-duration", "100m", "-subnets", "100::100/100"}
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assertHelpError(t, signCert(args, ob, eb, nopw), "invalid subnet definition: can only be ipv4, have 100::100/100")
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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// mismatched ca key
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_, caPriv2, _ := ed25519.GenerateKey(rand.Reader)
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caKeyF2, err := os.CreateTemp("", "sign-cert-2.key")
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assert.Nil(t, err)
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defer os.Remove(caKeyF2.Name())
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caKeyF2.Write(cert.MarshalEd25519PrivateKey(caPriv2))
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ob.Reset()
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eb.Reset()
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF2.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", "nope", "-out-key", "nope", "-duration", "100m", "-subnets", "a"}
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assert.EqualError(t, signCert(args, ob, eb, nopw), "refusing to sign, root certificate does not match private key")
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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// failed key write
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ob.Reset()
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eb.Reset()
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", "/do/not/write/pleasecrt", "-out-key", "/do/not/write/pleasekey", "-duration", "100m", "-subnets", "10.1.1.1/32"}
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assert.EqualError(t, signCert(args, ob, eb, nopw), "error while writing out-key: open /do/not/write/pleasekey: "+NoSuchDirError)
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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// create temp key file
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keyF, err := os.CreateTemp("", "test.key")
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assert.Nil(t, err)
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os.Remove(keyF.Name())
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// failed cert write
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ob.Reset()
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eb.Reset()
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", "/do/not/write/pleasecrt", "-out-key", keyF.Name(), "-duration", "100m", "-subnets", "10.1.1.1/32"}
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assert.EqualError(t, signCert(args, ob, eb, nopw), "error while writing out-crt: open /do/not/write/pleasecrt: "+NoSuchDirError)
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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os.Remove(keyF.Name())
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// create temp cert file
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crtF, err := os.CreateTemp("", "test.crt")
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assert.Nil(t, err)
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os.Remove(crtF.Name())
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// test proper cert with removed empty groups and subnets
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ob.Reset()
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eb.Reset()
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", crtF.Name(), "-out-key", keyF.Name(), "-duration", "100m", "-subnets", "10.1.1.1/32, , 10.2.2.2/32 , , ,, 10.5.5.5/32", "-groups", "1,, 2 , ,,,3,4,5"}
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assert.Nil(t, signCert(args, ob, eb, nopw))
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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// read cert and key files
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rb, _ := os.ReadFile(keyF.Name())
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lKey, b, err := cert.UnmarshalX25519PrivateKey(rb)
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assert.Len(t, b, 0)
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assert.Nil(t, err)
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assert.Len(t, lKey, 32)
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rb, _ = os.ReadFile(crtF.Name())
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lCrt, b, err := cert.UnmarshalNebulaCertificateFromPEM(rb)
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assert.Len(t, b, 0)
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assert.Nil(t, err)
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assert.Equal(t, "test", lCrt.Details.Name)
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assert.Equal(t, "1.1.1.1/24", lCrt.Details.Ips[0].String())
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assert.Len(t, lCrt.Details.Ips, 1)
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assert.False(t, lCrt.Details.IsCA)
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assert.Equal(t, []string{"1", "2", "3", "4", "5"}, lCrt.Details.Groups)
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assert.Len(t, lCrt.Details.Subnets, 3)
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assert.Len(t, lCrt.Details.PublicKey, 32)
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assert.Equal(t, time.Duration(time.Minute*100), lCrt.Details.NotAfter.Sub(lCrt.Details.NotBefore))
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sns := []string{}
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for _, sn := range lCrt.Details.Subnets {
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sns = append(sns, sn.String())
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}
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assert.Equal(t, []string{"10.1.1.1/32", "10.2.2.2/32", "10.5.5.5/32"}, sns)
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issuer, _ := ca.Sha256Sum()
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assert.Equal(t, issuer, lCrt.Details.Issuer)
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assert.True(t, lCrt.CheckSignature(caPub))
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// test proper cert with in-pub
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os.Remove(keyF.Name())
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os.Remove(crtF.Name())
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ob.Reset()
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eb.Reset()
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", crtF.Name(), "-in-pub", inPubF.Name(), "-duration", "100m", "-groups", "1"}
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assert.Nil(t, signCert(args, ob, eb, nopw))
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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// read cert file and check pub key matches in-pub
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rb, _ = os.ReadFile(crtF.Name())
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lCrt, b, err = cert.UnmarshalNebulaCertificateFromPEM(rb)
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assert.Len(t, b, 0)
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assert.Nil(t, err)
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assert.Equal(t, lCrt.Details.PublicKey, inPub)
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// test refuse to sign cert with duration beyond root
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ob.Reset()
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eb.Reset()
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", crtF.Name(), "-out-key", keyF.Name(), "-duration", "1000m", "-subnets", "10.1.1.1/32, , 10.2.2.2/32 , , ,, 10.5.5.5/32", "-groups", "1,, 2 , ,,,3,4,5"}
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assert.EqualError(t, signCert(args, ob, eb, nopw), "refusing to sign, root certificate constraints violated: certificate expires after signing certificate")
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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// create valid cert/key for overwrite tests
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os.Remove(keyF.Name())
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os.Remove(crtF.Name())
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", crtF.Name(), "-out-key", keyF.Name(), "-duration", "100m", "-subnets", "10.1.1.1/32, , 10.2.2.2/32 , , ,, 10.5.5.5/32", "-groups", "1,, 2 , ,,,3,4,5"}
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assert.Nil(t, signCert(args, ob, eb, nopw))
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// test that we won't overwrite existing key file
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os.Remove(crtF.Name())
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ob.Reset()
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eb.Reset()
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", crtF.Name(), "-out-key", keyF.Name(), "-duration", "100m", "-subnets", "10.1.1.1/32, , 10.2.2.2/32 , , ,, 10.5.5.5/32", "-groups", "1,, 2 , ,,,3,4,5"}
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assert.EqualError(t, signCert(args, ob, eb, nopw), "refusing to overwrite existing key: "+keyF.Name())
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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// create valid cert/key for overwrite tests
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os.Remove(keyF.Name())
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os.Remove(crtF.Name())
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", crtF.Name(), "-out-key", keyF.Name(), "-duration", "100m", "-subnets", "10.1.1.1/32, , 10.2.2.2/32 , , ,, 10.5.5.5/32", "-groups", "1,, 2 , ,,,3,4,5"}
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assert.Nil(t, signCert(args, ob, eb, nopw))
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// test that we won't overwrite existing certificate file
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os.Remove(keyF.Name())
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ob.Reset()
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eb.Reset()
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args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", crtF.Name(), "-out-key", keyF.Name(), "-duration", "100m", "-subnets", "10.1.1.1/32, , 10.2.2.2/32 , , ,, 10.5.5.5/32", "-groups", "1,, 2 , ,,,3,4,5"}
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assert.EqualError(t, signCert(args, ob, eb, nopw), "refusing to overwrite existing cert: "+crtF.Name())
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assert.Empty(t, ob.String())
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assert.Empty(t, eb.String())
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// create valid cert/key using encrypted CA key
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os.Remove(caKeyF.Name())
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os.Remove(caCrtF.Name())
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os.Remove(keyF.Name())
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os.Remove(crtF.Name())
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ob.Reset()
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eb.Reset()
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caKeyF, err = os.CreateTemp("", "sign-cert.key")
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assert.Nil(t, err)
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defer os.Remove(caKeyF.Name())
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caCrtF, err = os.CreateTemp("", "sign-cert.crt")
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assert.Nil(t, err)
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defer os.Remove(caCrtF.Name())
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// generate the encrypted key
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caPub, caPriv, _ = ed25519.GenerateKey(rand.Reader)
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kdfParams := cert.NewArgon2Parameters(64*1024, 4, 3)
|
|
b, _ = cert.EncryptAndMarshalSigningPrivateKey(cert.Curve_CURVE25519, caPriv, passphrase, kdfParams)
|
|
caKeyF.Write(b)
|
|
|
|
ca = cert.NebulaCertificate{
|
|
Details: cert.NebulaCertificateDetails{
|
|
Name: "ca",
|
|
NotBefore: time.Now(),
|
|
NotAfter: time.Now().Add(time.Minute * 200),
|
|
PublicKey: caPub,
|
|
IsCA: true,
|
|
},
|
|
}
|
|
b, _ = ca.MarshalToPEM()
|
|
caCrtF.Write(b)
|
|
|
|
// test with the proper password
|
|
args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", crtF.Name(), "-out-key", keyF.Name(), "-duration", "100m", "-subnets", "10.1.1.1/32, , 10.2.2.2/32 , , ,, 10.5.5.5/32", "-groups", "1,, 2 , ,,,3,4,5"}
|
|
assert.Nil(t, signCert(args, ob, eb, testpw))
|
|
assert.Equal(t, "Enter passphrase: ", ob.String())
|
|
assert.Empty(t, eb.String())
|
|
|
|
// test with the wrong password
|
|
ob.Reset()
|
|
eb.Reset()
|
|
|
|
testpw.password = []byte("invalid password")
|
|
args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", crtF.Name(), "-out-key", keyF.Name(), "-duration", "100m", "-subnets", "10.1.1.1/32, , 10.2.2.2/32 , , ,, 10.5.5.5/32", "-groups", "1,, 2 , ,,,3,4,5"}
|
|
assert.Error(t, signCert(args, ob, eb, testpw))
|
|
assert.Equal(t, "Enter passphrase: ", ob.String())
|
|
assert.Empty(t, eb.String())
|
|
|
|
// test with the user not entering a password
|
|
ob.Reset()
|
|
eb.Reset()
|
|
|
|
args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", crtF.Name(), "-out-key", keyF.Name(), "-duration", "100m", "-subnets", "10.1.1.1/32, , 10.2.2.2/32 , , ,, 10.5.5.5/32", "-groups", "1,, 2 , ,,,3,4,5"}
|
|
assert.Error(t, signCert(args, ob, eb, nopw))
|
|
// normally the user hitting enter on the prompt would add newlines between these
|
|
assert.Equal(t, "Enter passphrase: Enter passphrase: Enter passphrase: Enter passphrase: Enter passphrase: ", ob.String())
|
|
assert.Empty(t, eb.String())
|
|
|
|
// test an error condition
|
|
ob.Reset()
|
|
eb.Reset()
|
|
|
|
args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", crtF.Name(), "-out-key", keyF.Name(), "-duration", "100m", "-subnets", "10.1.1.1/32, , 10.2.2.2/32 , , ,, 10.5.5.5/32", "-groups", "1,, 2 , ,,,3,4,5"}
|
|
assert.Error(t, signCert(args, ob, eb, errpw))
|
|
assert.Equal(t, "Enter passphrase: ", ob.String())
|
|
assert.Empty(t, eb.String())
|
|
}
|