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20 changes: 20 additions & 0 deletions tls/common.go
Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,26 @@ const (
VersionSSL30 = 0x0300
)

// VersionName returns the name for the provided TLS version number
// (e.g. "TLS 1.3"), or a fallback representation of the value if the
// version is not implemented by this package.
func VersionName(version uint16) string {
switch version {
case VersionSSL30:
return "SSLv3"
case VersionTLS10:
return "TLS 1.0"
case VersionTLS11:
return "TLS 1.1"
case VersionTLS12:
return "TLS 1.2"
case VersionTLS13:
return "TLS 1.3"
default:
return fmt.Sprintf("0x%04X", version)
}
}

const (
maxPlaintext = 16384 // maximum plaintext payload length
maxCiphertext = 16384 + 2048 // maximum ciphertext payload length
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