通过删除 headers 并将块解析为 GoLang 中的一行来格式化 x509 PEM

Format x509 PEM by removing headers and parsing block into a single line in GoLang

我有一个标准的 x509 PEM 证书

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

我需要去掉 -----BEGIN CERTIFICATE----- & -----END CERTIFICATE----- 并将 body 放在一行中。

现在我可以编写一些正则表达式来执行此操作,但我想知道是否已经有 GoLang 惯用的方法来执行此操作,也许使用 x509 或加密模块。我在文档中进行了很好的搜索,但没有看到任何内容。

PEM 本质上只是以特定方式格式化的 base64,并支持元数据(此处未使用)。如果你删除所有你留下的普通旧 base64:

package main

import (
    "encoding/base64"
    "encoding/pem"
    "fmt"
)

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

func main() {
    block, _ := pem.Decode(cert)
    fmt.Println(base64.StdEncoding.EncodeToString(block.Bytes))
}

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