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Merge pull request #42 from xataio/add-config-tls-support
Add config tls support
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
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| package tls | ||
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| import ( | ||
| "crypto/tls" | ||
| "crypto/x509" | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
| ) | ||
|
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| type Config struct { | ||
| // Enabled determines if TLS should be used. Defaults to false. | ||
| Enabled bool | ||
| // File path to the CA PEM certificate to be used for TLS connection. If TLS is | ||
| // enabled and no CA cert file is provided, the system certificate pool is | ||
| // used as default. | ||
| CaCertFile string | ||
| // File path to the client PEM certificate | ||
| ClientCertFile string | ||
| // File path to the client PEM key | ||
| ClientKeyFile string | ||
| } | ||
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| func NewConfig(cfg *Config) (*tls.Config, error) { | ||
| if !cfg.Enabled { | ||
| return nil, nil | ||
| } | ||
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| certPool, err := getCertPool(cfg.CaCertFile) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| certificates, err := getCertificates(cfg.ClientCertFile, cfg.ClientKeyFile) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| return &tls.Config{ | ||
| MinVersion: tls.VersionTLS12, | ||
| MaxVersion: 0, | ||
| Certificates: certificates, | ||
| RootCAs: certPool, | ||
| }, nil | ||
| } | ||
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| func getCertPool(caCertFile string) (*x509.CertPool, error) { | ||
| if caCertFile != "" { | ||
| pemCertBytes, err := readFile(caCertFile) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("reading CA certificate file: %w", err) | ||
| } | ||
| certPool := x509.NewCertPool() | ||
| certPool.AppendCertsFromPEM(pemCertBytes) | ||
| return certPool, nil | ||
| } | ||
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| return x509.SystemCertPool() | ||
| } | ||
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| func getCertificates(clientCertFile, clientKeyFile string) ([]tls.Certificate, error) { | ||
| if clientCertFile != "" && clientKeyFile != "" { | ||
| cert, err := tls.LoadX509KeyPair(clientCertFile, clientKeyFile) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return []tls.Certificate{cert}, nil | ||
| } | ||
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| return []tls.Certificate{}, nil | ||
| } | ||
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| func readFile(path string) ([]byte, error) { | ||
| file, err := os.Open(path) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer file.Close() | ||
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| return io.ReadAll(file) | ||
| } |