/
const.go
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/
const.go
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// Copyright 2019 Teserakt AG
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package crypto
import "time"
// List of global e4 constants
const (
// IDLen is the length of an E4 ID
IDLen = 16
// KeyLen is the length of a symmetric key
KeyLen = 32
// TagLen is the length of the authentication tag appended to the cipher
TagLen = 16
// HashLen is the length of a hashed topic
HashLen = 16
// TimestampLen is the length of the timestamp
TimestampLen = 8
// MaxTopicLen is the maximum length of a topic
MaxTopicLen = 512
// MaxDelayDuration is the validity time of a protected message
MaxDelayDuration = 10 * time.Minute
// MaxDelayKeyTransition is the validity time of an old topic key once updated
MaxDelayKeyTransition = 60 * time.Minute
// IDLenHex is the length of a hexadecimal encoded ID
IDLenHex = IDLen * 2
// KeyLenHex is the length of a hexadecimal encoded key
KeyLenHex = KeyLen * 2
// Curve25519PubKeyLen is the length of a curve25519 public key
Curve25519PubKeyLen = 32
// Curve25519PrivKeyLen is the length of a curve25519 private key
Curve25519PrivKeyLen = 32
)