通过在 GoLang 中删除标头并将块解析为一行来格式化 x509 PEM

Question

我有一个标准的 x509 PEM 证书-----BEGIN CERTIFICATE-----MIICNzCCAd2gAwIBAgITPLBoBQhl1hqFND9S+SGWbfzaRTAKBggqhkjOPQQDAjBoMQswCQYDVQQGEwJVSzESMBAGA1UECBMJV2lsdHNoaXJlMRMwEQYDVQQHEwpDaGlwcGVuaGFtMQ8wDQYDVQQKEwZSZWRIYXQxDDAKBgNVBAsTA0NUTzERMA8GA1UEAxMIdGVzdGNlcnQwHhcNMjEwMzEyMjMyNDQ5WhcNMzEwMjI4MjMyNDQ5WjBoMQswCQYDVQQGEwJVSzESMBAGA1UECBMJV2lsdHNoaXJlMRMwEQYDVQQHEwpDaGlwcGVuaGFtMQ8wDQYDVQQKEwZSZWRIYXQxDDAKBgNVBAsTA0NUTzERMA8GA1UEAxMIdGVzdGNlcnQwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAAQRn+Alyof6xP3GQClSwgV0NFuYYEwmKP/WLWr/LwB6LUYzt5v49RlqG83KuaJSpeOj7G7MVABdpIZYWwqAiZV3o2YwZDAOBgNVHQ8BAf8EBAMCAQYwEgYDVR0TAQH/BAgwBgEB/wIBATAdBgNVHQ4EFgQUT8Jwm6JuVb0dsiuHUROiHOOVHVkwHwYDVR0jBBgwFoAUT8Jwm6JuVb0dsiuHUROiHOOVHVkwCgYIKoZIzj0EAwIDSAAwRQIhAJkNZmP6sKA+8EebRXFkBa9DPjacBpTcOljJotvKidRhAiAuNrIazKEw2G4dw8x1z6EYk9G+7fJP5m93bjm/JfMCdF==-----END CERTIFICATE-----我需要剥离并将身体分成一条线。-----BEGIN CERTIFICATE----------END CERTIFICATE-----现在我可以编写一些正则表达式来执行此操作，但是我想知道是否已经有一种GoLang惯用方法来执行此操作，也许使用x509或加密模块。我通过文档进行了很好的搜索，但看不到任何内容。

Answer 1

PEM 本质上只是以特定方式格式化的 base64，并且支持元数据（此处未使用）。如果你删除了所有的东西，你只剩下普通的旧基数64：

package main

import (

    "encoding/base64"

    "encoding/pem"

    "fmt"

)

var cert = []byte(`-----BEGIN CERTIFICATE-----

MIICNzCCAd2gAwIBAgITPLBoBQhl1hqFND9S+SGWbfzaRTAKBggqhkjOPQQDAjBo

MQswCQYDVQQGEwJVSzESMBAGA1UECBMJV2lsdHNoaXJlMRMwEQYDVQQHEwpDaGlw

cGVuaGFtMQ8wDQYDVQQKEwZSZWRIYXQxDDAKBgNVBAsTA0NUTzERMA8GA1UEAxMI

dGVzdGNlcnQwHhcNMjEwMzEyMjMyNDQ5WhcNMzEwMjI4MjMyNDQ5WjBoMQswCQYD

VQQGEwJVSzESMBAGA1UECBMJV2lsdHNoaXJlMRMwEQYDVQQHEwpDaGlwcGVuaGFt

MQ8wDQYDVQQKEwZSZWRIYXQxDDAKBgNVBAsTA0NUTzERMA8GA1UEAxMIdGVzdGNl

cnQwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAAQRn+Alyof6xP3GQClSwgV0NFuY

YEwmKP/WLWr/LwB6LUYzt5v49RlqG83KuaJSpeOj7G7MVABdpIZYWwqAiZV3o2Yw

ZDAOBgNVHQ8BAf8EBAMCAQYwEgYDVR0TAQH/BAgwBgEB/wIBATAdBgNVHQ4EFgQU

T8Jwm6JuVb0dsiuHUROiHOOVHVkwHwYDVR0jBBgwFoAUT8Jwm6JuVb0dsiuHUROi

HOOVHVkwCgYIKoZIzj0EAwIDSAAwRQIhAJkNZmP6sKA+8EebRXFkBa9DPjacBpTc

OljJotvKidRhAiAuNrIazKEw2G4dw8x1z6EYk9G+7fJP5m93bjm/JfMCdF==

-----END CERTIFICATE-----`)

func main() {

    block, _ := pem.Decode(cert)

    fmt.Println(base64.StdEncoding.EncodeToString(block.Bytes))

}

游乐场： https://play.golang.org/p/03HfOsC1J8X