//go:build !nogostls13

package godlighty

import "crypto/tls"

func CHIHasGOST(chi *tls.ClientHelloInfo) bool {
	tls13Found := false
	for _, v := range chi.SupportedVersions {
		if v == tls.VersionTLS13 {
			tls13Found = true
			break
		}
	}
	if !tls13Found {
		return false
	}
	for _, ss := range chi.SignatureSchemes {
		switch ss {
		case tls.GOSTR34102012256A, tls.GOSTR34102012256B, tls.GOSTR34102012256C, tls.GOSTR34102012256D, tls.GOSTR34102012512A, tls.GOSTR34102012512B, tls.GOSTR34102012512C:
			return true
		}
	}
	return false
}