Golang : Use TLS version 1.2 and enforce server security configuration over client
Problem:
You want to force your Golang program to use TLS(Transport Layer Security) protocol version 1.2 only and use server TLS configuration instead of client. How to do that?
Solution:
Set the MinVersion, MaxVersion parameters to tls.VersionTLS12
and PreferServerCipherSuites to true
. Setting PreferServerCipherSuites will force client to use server TLS configuration.
config.MinVersion = tls.VersionTLS12
config.MaxVersion = tls.VersionTLS12
config.PreferServerCipherSuites = true
For example:
config := tls.Config{Certificates : []tls.Certificate{certificate}, ClientAuth: tls.RequireAnyClientCert}
config.CipherSuites = []uint16{
tls.TLS_RSA_WITH_AES_256_CBC_SHA,
tls.TLS_RSA_WITH_AES_128_CBC_SHA,
tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256}
config.MinVersion = tls.VersionTLS12
config.MaxVersion = tls.VersionTLS12
config.PreferServerCipherSuites = true
References:
See also : Golang : Use modern ciphers only in secure connection
By Adam Ng
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