Go：从 ssl 证书中获取 'subjectunstructeredName' 的值

发布于12月01日

我正在try 将一些Python代码迁移到Golang. 代码需要从SSL证书主题获取unstructuredName值.

以下是它在Python中的工作方式:

from cryptography import x509
from cryptography.x509.oid import NameOID
from cryptography.hazmat.backends import default_backend

pem = b"""\
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
"""

cert = x509.load_pem_x509_certificate(pem, default_backend())
unstructured_name = cert.subject.get_attributes_for_oid(NameOID.UNSTRUCTURED_NAME)[0].value
print(unstructured_name)

这段代码打印unstructuredName的值(在本例中为"一些附加信息").

我的围棋try 是这样的:

package main

import (
    "crypto/x509"
    "encoding/pem"
    "fmt"

    "log"
)

const certRaw = `-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
`

func main() {
    block, rest := pem.Decode([]byte(certRaw))
    if block == nil {
        log.Fatalf("Decode CA PEM, %v", rest)
    }
    cert, err := x509.ParseCertificate(block.Bytes)
    if err != nil {
        log.Fatalf("parse certificate")
    }
    fmt.Println(cert.Subject.String())
    // Unmarshall and print value of unstructuredName (oid: 1.2.840.113549.1.9.2)
    // ???
}

Goplayground :https://go.dev/play/p/VwkpDbNpQ78

我找不到一个函数来获取OID的属性.当我打印出整个主题时，我看到值仍然是(der？)编码的.

如何对unstructuredName的值进行解码或解组？

非常感谢.

package main import ( "crypto/x509" "encoding/pem" "fmt" "log" ) const certRaw = `-----BEGIN CERTIFICATE----- MIIDcTCCAlmgAwIBAgIUNjbltje6I/S9PJN8KgIxyi2Iw58wDQYJKoZIhvcNAQEL BQAwSTEUMBIGA1UEAwwLZXhhbXBsZS5jb20xFjAUBgNVBAoMDUV4YW1wbGUsIElu Yy4xGTAXBgNVBAsMEEV4YW1wbGUgRGl2aXNpb24wHhcNMjIxMTI5MTU1NDMxWhcN MzcxMTI2MTU1NDMxWjCBmzELMAkGA1UEBhMCVVMxEzARBgNVBAgMCkNhbGlmb3Ju aWExFjAUBgNVBAcMDVNhbiBGcmFuY2lzY28xGjAYBgNVBAoMEVNvbWUgT3JnYW5p emF0aW9uMR4wHAYDVQQDDBVzb21lLm9yZ2FuaXphdGlvbi5jb20xIzAhBgkqhkiG 9w0BCQIMFHNvbWUgYWRkaXRpb25hbCBpbmZvMIIBIjANBgkqhkiG9w0BAQEFAAOC AQ8AMIIBCgKCAQEAyqprugdiaERkAHbx06WobPekkZ8CFyiR6dv8D49eqHO1xmCp aVotFJSj5cktUH64885LfTCghUdPcw+rIh0fB8tOleBUA9yIMUqbYFnRgLrz7U+g bkgyQO7w0PsB7tgUKI7esEEcvWSoygWyZKSiUZBSQOAuEcJxog7GMR6QiUtmiLaq DY0Wwlir7iakX0Qlq8iHFY6yNf2aghET6IC9tGbkifO6HWLEP4gBWwtIvCd94l6L 6rNpGtYXHSmlaEL0jn/4QPADciXDrBnAhFfzBrqyO7SYNqJUiENXEvq+7ESIqibV RKvt9HpAj+O/Ij4z+Z6Xys8sE3RE4FSNSdXphQIDAQABMA0GCSqGSIb3DQEBCwUA A4IBAQCH6vxtrqUBFVgahnmjPSHci3JCaz/X9hL2QgXNTzAS3rLJBd6OrC+3ITli vzJlWryl1hzTxFEcj3EtVG1AckNOHX0RCFggNBSQSOz6oaaZlS6BAkChbRUqmHfG iCDK8A1pV1cr/SPBe/UjSkbG548JpqCSWEUL1jNDsNzZmjuXy+FTM2PDYiSRbGxY Y0SpkxAhuKltblzghh1KIMU7UutEUXDGMlCCYEY9/ibWTKa9J/WNjC0CQC13jLe8 PqVLIeXIoVSkTsgbzwYxW2P+M6QbjRC83OORwm8GnEj1k2yX6JmnzLifidFiT/h6 M2Y3gjYqfGexupmK9toEejZPj1RB -----END CERTIFICATE----- ` func main() { block, rest := pem.Decode([]byte(certRaw)) if block == nil { log.Fatalf("Decode CA PEM, %v", rest) } cert, err := x509.ParseCertificate(block.Bytes) if err != nil { log.Fatalf("parse certificate") } // 1.2.840.113549.1.9.2 var oidUnstructuredName = []int{1, 2, 840, 113549, 1, 9, 2} var unstructuredName string for _, n := range cert.Subject.Names { if n.Type.Equal(oidUnstructuredName) { if v, ok := n.Value.(string); ok { unstructuredName = v } } } fmt.Println(unstructuredName) }

Go：从 ssl 证书中获取 'subjectunstructeredName' 的值

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