从 PEM 解析和打印 X.509 属性

Question

我正在寻找一个在 go 中解析 X.509 PEM 并将值转储到标准输出的简单示例。任何人都可以提供一个例子吗？

Answer 1

您想使用 encoding.pem to decode the pem file, which will give you the DER blocks you can decode with the crypto/x509 包。

例如：

certPEMBlock, err := ioutil.ReadFile(certFile)
if err != nil {
    log.Fatal(err)
}

var blocks [][]byte
for {
    var certDERBlock *pem.Block
    certDERBlock, certPEMBlock = pem.Decode(certPEMBlock)
    if certDERBlock == nil {
        break
    }

    if certDERBlock.Type == "CERTIFICATE" {
        blocks = append(blocks, certDERBlock.Bytes)
    }
}

for _, block := range blocks {
    cert, err := x509.ParseCertificate(block)
    if err != nil {
        log.Println(err)
        continue
    }

    fmt.Println("Certificate:")
    fmt.Printf("\tSubject: %+v\n", cert.Subject)
    fmt.Printf("\tDNS Names: %+v\n", cert.DNSNames)
    fmt.Printf("\tEmailAddresses: %+v\n", cert.EmailAddresses)
    fmt.Printf("\tIPAddresses: %+v\n", cert.IPAddresses)
}

从 PEM 解析和打印 X.509 属性

Parsing and printing X.509 attributes from PEM

go

x509

pem