mirror of
https://github.com/alibaba/higress.git
synced 2026-02-21 22:40:59 +08:00
98 lines
2.5 KiB
Go
98 lines
2.5 KiB
Go
// Copyright (c) 2022 Alibaba Group Holding Ltd.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cert
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import (
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"crypto/x509"
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"encoding/pem"
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"fmt"
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"hash/fnv"
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"math/rand"
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"net"
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"regexp"
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"time"
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)
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// parseCertsFromPEMBundle parses a certificate bundle from top to bottom and returns
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// a slice of x509 certificates. This function will error if no certificates are found.
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func parseCertsFromPEMBundle(bundle []byte) ([]*x509.Certificate, error) {
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var certificates []*x509.Certificate
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var certDERBlock *pem.Block
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for {
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certDERBlock, bundle = pem.Decode(bundle)
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if certDERBlock == nil {
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break
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}
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if certDERBlock.Type == "CERTIFICATE" {
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cert, err := x509.ParseCertificate(certDERBlock.Bytes)
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if err != nil {
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return nil, err
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}
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certificates = append(certificates, cert)
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}
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}
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if len(certificates) == 0 {
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return nil, fmt.Errorf("no certificates found in bundle")
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}
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return certificates, nil
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}
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func notAfter(cert *x509.Certificate) time.Time {
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if cert == nil {
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return time.Time{}
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}
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return cert.NotAfter.Truncate(time.Second).Add(1 * time.Second)
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}
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func notBefore(cert *x509.Certificate) time.Time {
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if cert == nil {
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return time.Time{}
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}
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return cert.NotBefore.Truncate(time.Second).Add(1 * time.Second)
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}
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// hostOnly returns only the host portion of hostport.
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// If there is no port or if there is an error splitting
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// the port off, the whole input string is returned.
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func hostOnly(hostport string) string {
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host, _, err := net.SplitHostPort(hostport)
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if err != nil {
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return hostport // OK; probably had no port to begin with
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}
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return host
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}
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func rangeRandom(min, max int) (number int) {
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r := rand.New(rand.NewSource(time.Now().UnixNano()))
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number = r.Intn(max-min) + min
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return number
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}
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func ValidateEmail(email string) bool {
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pattern := `^[a-zA-Z0-9._%+\-]+@[a-zA-Z0-9.\-]+\.[a-zA-Z]{2,}$`
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regExp := regexp.MustCompile(pattern)
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if regExp.MatchString(email) {
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return true
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} else {
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return false
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}
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}
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func fastHash(input []byte) string {
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h := fnv.New32a()
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h.Write(input)
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return fmt.Sprintf("%x", h.Sum32())
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}
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