diff options
Diffstat (limited to 'vendor/github.com/prometheus/common/config/tls_config.go')
-rw-r--r-- | vendor/github.com/prometheus/common/config/tls_config.go | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/vendor/github.com/prometheus/common/config/tls_config.go b/vendor/github.com/prometheus/common/config/tls_config.go new file mode 100644 index 000000000..7c7e7cb02 --- /dev/null +++ b/vendor/github.com/prometheus/common/config/tls_config.go @@ -0,0 +1,79 @@ +// Copyright 2016 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package config + +import ( + "crypto/tls" + "crypto/x509" + "fmt" + "io/ioutil" +) + +// TLSConfig configures the options for TLS connections. +type TLSConfig struct { + // The CA cert to use for the targets. + CAFile string `yaml:"ca_file,omitempty"` + // The client cert file for the targets. + CertFile string `yaml:"cert_file,omitempty"` + // The client key file for the targets. + KeyFile string `yaml:"key_file,omitempty"` + // Disable target certificate validation. + InsecureSkipVerify bool `yaml:"insecure_skip_verify"` + + // Catches all undefined fields and must be empty after parsing. + XXX map[string]interface{} `yaml:",inline"` +} + +// UnmarshalYAML implements the yaml.Unmarshaler interface. +func (c *TLSConfig) UnmarshalYAML(unmarshal func(interface{}) error) error { + type plain TLSConfig + if err := unmarshal((*plain)(c)); err != nil { + return err + } + return checkOverflow(c.XXX, "TLS config") +} + +// GenerateConfig produces a tls.Config based on TLS connection options. +// It loads certificate files from disk if they are defined. +func (c *TLSConfig) GenerateConfig() (*tls.Config, error) { + tlsConfig := &tls.Config{InsecureSkipVerify: c.InsecureSkipVerify} + + // If a CA cert is provided then let's read it in so we can validate the + // scrape target's certificate properly. + if len(c.CAFile) > 0 { + caCertPool := x509.NewCertPool() + // Load CA cert. + caCert, err := ioutil.ReadFile(c.CAFile) + if err != nil { + return nil, fmt.Errorf("unable to use specified CA cert %s: %s", c.CAFile, err) + } + caCertPool.AppendCertsFromPEM(caCert) + tlsConfig.RootCAs = caCertPool + } + + if len(c.CertFile) > 0 && len(c.KeyFile) == 0 { + return nil, fmt.Errorf("client cert file %q specified without client key file", c.CertFile) + } else if len(c.KeyFile) > 0 && len(c.CertFile) == 0 { + return nil, fmt.Errorf("client key file %q specified without client cert file", c.KeyFile) + } else if len(c.CertFile) > 0 && len(c.KeyFile) > 0 { + cert, err := tls.LoadX509KeyPair(c.CertFile, c.KeyFile) + if err != nil { + return nil, fmt.Errorf("unable to use specified client cert (%s) & key (%s): %s", c.CertFile, c.KeyFile, err) + } + tlsConfig.Certificates = []tls.Certificate{cert} + } + tlsConfig.BuildNameToCertificate() + + return tlsConfig, nil +} |