Added flag for user configurable cipher suites

Configuration of list of cipher suites allows a user to disable use
of weak ciphers or continue to support them for legacy usage if they
so choose.

List of available cipher suites at:
https://golang.org/pkg/crypto/tls/#pkg-constants

Default cipher suites have been updated to:
- TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
- TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
- TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305
- TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305
- TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
- TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
- TLS_AES_128_GCM_SHA256
- TLS_CHACHA20_POLY1305_SHA256
- TLS_AES_256_GCM_SHA384

MinimumTLS has also been updated to include TLS 1.3 as an option
and now defaults to TLS 1.2 since 1.0 and 1.1 have been deprecated.

Signed-off-by: David Luu <david@davidluu.info>
This commit is contained in:
David Luu 2021-02-18 15:31:23 -06:00
parent 22c074842e
commit 1e625d0076
6 changed files with 412 additions and 41 deletions

View file

@ -111,6 +111,9 @@ type Configuration struct {
// Specifies the lowest TLS version allowed
MinimumTLS string `yaml:"minimumtls,omitempty"`
// Specifies a list of cipher suites allowed
CipherSuites []string `yaml:"ciphersuites,omitempty"`
// LetsEncrypt is used to configuration setting up TLS through
// Let's Encrypt instead of manually specifying certificate and
// key. If a TLS certificate is specified, the Let's Encrypt