Merge pull request #4340 from hashicorp/f-tls-parse-certs
Parse CA certificate to catch more specific errors
This commit is contained in:
Alex Dadgar
GitHub
commit
5aebd8d2d0
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@ -2,6 +2,7 @@
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IMPROVEMENTS:
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* core: Updated serf library to improve how leave intents are handled [[GH-4278](https://github.com/hashicorp/nomad/issues/4278)]
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* core: Add more descriptive errors when parsing agent TLS certificates [[GH-4340](https://github.com/hashicorp/nomad/issues/4340)]
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* core: Added TLS configuration option to prefer server's ciphersuites over clients[[GH-4338](https://github.com/hashicorp/nomad/issues/4338)]
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* core: Add the option for operators to configure TLS versions and allowed
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cipher suites. Default is a subset of safe ciphers and TLS 1.2 [[GH-4269](https://github.com/hashicorp/nomad/pull/4269)]
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@ -3,6 +3,7 @@ package tlsutil
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import (
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"crypto/tls"
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"crypto/x509"
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"encoding/pem"
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"fmt"
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"io/ioutil"
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"net"
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@ -153,8 +154,35 @@ func (c *Config) AppendCA(pool *x509.CertPool) error {
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return fmt.Errorf("Failed to read CA file: %v", err)
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}
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block, rest := pem.Decode(data)
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if err := validateCertificate(block); err != nil {
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return err
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}
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for len(rest) > 0 {
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block, rest = pem.Decode(rest)
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if err := validateCertificate(block); err != nil {
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return err
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}
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}
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if !pool.AppendCertsFromPEM(data) {
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return fmt.Errorf("Failed to parse any CA certificates")
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return fmt.Errorf("Failed to add any CA certificates")
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}
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return nil
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}
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// validateCertificate checks to ensure a certificate is valid. If it is not,
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// return a descriptive error of why the certificate is invalid.
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func validateCertificate(block *pem.Block) error {
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if block == nil {
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return fmt.Errorf("Failed to decode CA file from pem format")
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}
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// Parse the certificate to ensure that it is properly formatted
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if _, err := x509.ParseCertificates(block.Bytes); err != nil {
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return fmt.Errorf("Failed to parse CA file: %v", err)
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}
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return nil
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@ -7,6 +7,7 @@ import (
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"io"
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"io/ioutil"
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"net"
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"os"
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"strings"
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"testing"
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@ -26,14 +27,142 @@ const (
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)
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func TestConfig_AppendCA_None(t *testing.T) {
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require := require.New(t)
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conf := &Config{}
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pool := x509.NewCertPool()
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err := conf.AppendCA(pool)
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if err != nil {
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t.Fatalf("err: %v", err)
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require.Nil(err)
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}
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func TestConfig_AppendCA_Valid(t *testing.T) {
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require := require.New(t)
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conf := &Config{
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CAFile: cacert,
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}
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if len(pool.Subjects()) != 0 {
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t.Fatalf("bad: %v", pool.Subjects())
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pool := x509.NewCertPool()
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err := conf.AppendCA(pool)
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require.Nil(err)
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}
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func TestConfig_AppendCA_Valid_MultipleCerts(t *testing.T) {
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require := require.New(t)
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tmpCAFile, err := ioutil.TempFile("/tmp", "test_ca_file")
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require.Nil(err)
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defer os.Remove(tmpCAFile.Name())
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certs := `
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-----BEGIN CERTIFICATE-----
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MIICMzCCAdqgAwIBAgIUNZ9L86Xp9EuDH0/qyAesh599LXQwCgYIKoZIzj0EAwIw
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eDELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExFjAUBgNVBAcTDVNh
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biBGcmFuY2lzY28xEjAQBgNVBAoTCUhhc2hpQ29ycDEOMAwGA1UECxMFTm9tYWQx
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GDAWBgNVBAMTD25vbWFkLmhhc2hpY29ycDAeFw0xNjExMTAxOTQ4MDBaFw0yMTEx
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MDkxOTQ4MDBaMHgxCzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpDYWxpZm9ybmlhMRYw
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FAYDVQQHEw1TYW4gRnJhbmNpc2NvMRIwEAYDVQQKEwlIYXNoaUNvcnAxDjAMBgNV
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BAsTBU5vbWFkMRgwFgYDVQQDEw9ub21hZC5oYXNoaWNvcnAwWTATBgcqhkjOPQIB
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BggqhkjOPQMBBwNCAARfJmTdHzYIMPD8SK+kj5Gc79fmpOcg6wnb4JNVwCqWw9O+
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uNdZJZWSi4Q/4HojM5FTSBqYxNgSrmY/o3oQrCPlo0IwQDAOBgNVHQ8BAf8EBAMC
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AQYwDwYDVR0TAQH/BAUwAwEB/zAdBgNVHQ4EFgQUOjVq/BectnhcKn6EHUD4NJFm
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/UAwCgYIKoZIzj0EAwIDRwAwRAIgTemDJGSGtcQPXLWKiQNw4SKO9wAPhn/WoKW4
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Ln2ZUe8CIDsQswBQS7URbqnKYDye2Y4befJkr4fmhhmMQb2ex9A4
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-----END CERTIFICATE-----
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-----BEGIN CERTIFICATE-----
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MIICMzCCAdqgAwIBAgIUNZ9L86Xp9EuDH0/qyAesh599LXQwCgYIKoZIzj0EAwIw
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eDELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExFjAUBgNVBAcTDVNh
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biBGcmFuY2lzY28xEjAQBgNVBAoTCUhhc2hpQ29ycDEOMAwGA1UECxMFTm9tYWQx
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GDAWBgNVBAMTD25vbWFkLmhhc2hpY29ycDAeFw0xNjExMTAxOTQ4MDBaFw0yMTEx
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MDkxOTQ4MDBaMHgxCzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpDYWxpZm9ybmlhMRYw
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FAYDVQQHEw1TYW4gRnJhbmNpc2NvMRIwEAYDVQQKEwlIYXNoaUNvcnAxDjAMBgNV
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BAsTBU5vbWFkMRgwFgYDVQQDEw9ub21hZC5oYXNoaWNvcnAwWTATBgcqhkjOPQIB
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BggqhkjOPQMBBwNCAARfJmTdHzYIMPD8SK+kj5Gc79fmpOcg6wnb4JNVwCqWw9O+
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uNdZJZWSi4Q/4HojM5FTSBqYxNgSrmY/o3oQrCPlo0IwQDAOBgNVHQ8BAf8EBAMC
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AQYwDwYDVR0TAQH/BAUwAwEB/zAdBgNVHQ4EFgQUOjVq/BectnhcKn6EHUD4NJFm
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/UAwCgYIKoZIzj0EAwIDRwAwRAIgTemDJGSGtcQPXLWKiQNw4SKO9wAPhn/WoKW4
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Ln2ZUe8CIDsQswBQS7URbqnKYDye2Y4befJkr4fmhhmMQb2ex9A4
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-----END CERTIFICATE-----`
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_, err = tmpCAFile.Write([]byte(certs))
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require.Nil(err)
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conf := &Config{
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CAFile: tmpCAFile.Name(),
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}
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pool := x509.NewCertPool()
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err = conf.AppendCA(pool)
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require.Nil(err)
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}
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func TestConfig_AppendCA_InValid_MultipleCerts(t *testing.T) {
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require := require.New(t)
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tmpCAFile, err := ioutil.TempFile("/tmp", "test_ca_file")
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require.Nil(err)
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defer os.Remove(tmpCAFile.Name())
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certs := `
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-----BEGIN CERTIFICATE-----
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MIICMzCCAdqgAwIBAgIUNZ9L86Xp9EuDH0/qyAesh599LXQwCgYIKoZIzj0EAwIw
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eDELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExFjAUBgNVBAcTDVNh
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biBGcmFuY2lzY28xEjAQBgNVBAoTCUhhc2hpQ29ycDEOMAwGA1UECxMFTm9tYWQx
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GDAWBgNVBAMTD25vbWFkLmhhc2hpY29ycDAeFw0xNjExMTAxOTQ4MDBaFw0yMTEx
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MDkxOTQ4MDBaMHgxCzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpDYWxpZm9ybmlhMRYw
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FAYDVQQHEw1TYW4gRnJhbmNpc2NvMRIwEAYDVQQKEwlIYXNoaUNvcnAxDjAMBgNV
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BAsTBU5vbWFkMRgwFgYDVQQDEw9ub21hZC5oYXNoaWNvcnAwWTATBgcqhkjOPQIB
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BggqhkjOPQMBBwNCAARfJmTdHzYIMPD8SK+kj5Gc79fmpOcg6wnb4JNVwCqWw9O+
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uNdZJZWSi4Q/4HojM5FTSBqYxNgSrmY/o3oQrCPlo0IwQDAOBgNVHQ8BAf8EBAMC
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AQYwDwYDVR0TAQH/BAUwAwEB/zAdBgNVHQ4EFgQUOjVq/BectnhcKn6EHUD4NJFm
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/UAwCgYIKoZIzj0EAwIDRwAwRAIgTemDJGSGtcQPXLWKiQNw4SKO9wAPhn/WoKW4
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Ln2ZUe8CIDsQswBQS7URbqnKYDye2Y4befJkr4fmhhmMQb2ex9A4
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-----END CERTIFICATE-----
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-----BEGIN CERTIFICATE-----
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Invalid
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-----END CERTIFICATE-----`
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_, err = tmpCAFile.Write([]byte(certs))
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require.Nil(err)
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conf := &Config{
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CAFile: tmpCAFile.Name(),
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}
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pool := x509.NewCertPool()
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err = conf.AppendCA(pool)
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require.NotNil(err)
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}
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func TestConfig_AppendCA_Invalid(t *testing.T) {
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require := require.New(t)
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{
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conf := &Config{
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CAFile: "invalidFile",
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}
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pool := x509.NewCertPool()
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err := conf.AppendCA(pool)
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require.NotNil(err)
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require.Contains(err.Error(), "Failed to read CA file")
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require.Equal(len(pool.Subjects()), 0)
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}
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{
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tmpFile, err := ioutil.TempFile("/tmp", "test_ca_file")
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require.Nil(err)
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defer os.Remove(tmpFile.Name())
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_, err = tmpFile.Write([]byte("Invalid CA Content!"))
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require.Nil(err)
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conf := &Config{
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CAFile: tmpFile.Name(),
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}
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pool := x509.NewCertPool()
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err = conf.AppendCA(pool)
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require.NotNil(err)
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require.Contains(err.Error(), "Failed to decode CA file from pem format")
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require.Equal(len(pool.Subjects()), 0)
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}
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}
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