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Source file src/crypto/tls/alert.go

  // Copyright 2009 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  package tls
  
  import "strconv"
  
  type alert uint8
  
  const (
  	// alert level
  	alertLevelWarning = 1
  	alertLevelError   = 2
  )
  
  const (
  	alertCloseNotify            alert = 0
  	alertUnexpectedMessage      alert = 10
  	alertBadRecordMAC           alert = 20
  	alertDecryptionFailed       alert = 21
  	alertRecordOverflow         alert = 22
  	alertDecompressionFailure   alert = 30
  	alertHandshakeFailure       alert = 40
  	alertBadCertificate         alert = 42
  	alertUnsupportedCertificate alert = 43
  	alertCertificateRevoked     alert = 44
  	alertCertificateExpired     alert = 45
  	alertCertificateUnknown     alert = 46
  	alertIllegalParameter       alert = 47
  	alertUnknownCA              alert = 48
  	alertAccessDenied           alert = 49
  	alertDecodeError            alert = 50
  	alertDecryptError           alert = 51
  	alertProtocolVersion        alert = 70
  	alertInsufficientSecurity   alert = 71
  	alertInternalError          alert = 80
  	alertInappropriateFallback  alert = 86
  	alertUserCanceled           alert = 90
  	alertNoRenegotiation        alert = 100
  	alertNoApplicationProtocol  alert = 120
  )
  
  var alertText = map[alert]string{
  	alertCloseNotify:            "close notify",
  	alertUnexpectedMessage:      "unexpected message",
  	alertBadRecordMAC:           "bad record MAC",
  	alertDecryptionFailed:       "decryption failed",
  	alertRecordOverflow:         "record overflow",
  	alertDecompressionFailure:   "decompression failure",
  	alertHandshakeFailure:       "handshake failure",
  	alertBadCertificate:         "bad certificate",
  	alertUnsupportedCertificate: "unsupported certificate",
  	alertCertificateRevoked:     "revoked certificate",
  	alertCertificateExpired:     "expired certificate",
  	alertCertificateUnknown:     "unknown certificate",
  	alertIllegalParameter:       "illegal parameter",
  	alertUnknownCA:              "unknown certificate authority",
  	alertAccessDenied:           "access denied",
  	alertDecodeError:            "error decoding message",
  	alertDecryptError:           "error decrypting message",
  	alertProtocolVersion:        "protocol version not supported",
  	alertInsufficientSecurity:   "insufficient security level",
  	alertInternalError:          "internal error",
  	alertInappropriateFallback:  "inappropriate fallback",
  	alertUserCanceled:           "user canceled",
  	alertNoRenegotiation:        "no renegotiation",
  	alertNoApplicationProtocol:  "no application protocol",
  }
  
  func (e alert) String() string {
  	s, ok := alertText[e]
  	if ok {
  		return "tls: " + s
  	}
  	return "tls: alert(" + strconv.Itoa(int(e)) + ")"
  }
  
  func (e alert) Error() string {
  	return e.String()
  }
  

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