前往语言将模数指数转换为X.509证书 [英] Go Language Convert Modulus exponent to X.509 certificate

问题描述

我见过很多关于如何将X.509转换为指数模的例子，但我还没有看到相反的结果。

我从我的关键端点如下所示：

  {keys：[{alg：RS256，e： AQAB， N： ok6rvXu95337IxsDXrKzlIqw_I_zPDG8JyEw2CTOtNMoDi1QzpXQVMGj2snNEmvNYaCTmFf51I-EDgeFLLexr40jzBXlg72quV4aw4yiNuxkigW0gMA92OmaT2jMRIdDZM8mVokoxyPfLub2YnXHFq0XuUUgkX_TlutVhgGbyPN0M12teYZtMYo2AUzIRggONhHvnibHP0CPWDjCwSfp3On1Recn4DPxbn3DuGslF2myalmCtkujNcrhHLhwYPP-yZFb8e0XSNTcQvXaQxAqmnWH6NXcOtaeWMQe43PNTAyNinhndgI8ozG3Hz-1NzHssDH_yk6UYFSszhDbWAzyqw， 孩子： wyMwK4A6CL9Qw11uofVeyQ119XyX-xykymkkXygZ5OM， KTY： RSA， 用： SIG}，{ ALG： RS256， E： AQAB 中， n：nXv6FSAcMjuanQ2hIIUb8Vkqe94t98kPh2T8-0j6-Jq8pOclgKdtVeIZcBE9F_XiuJvg4b6WVs-UVA-pS8mmMvQ21xU5Q_37Cojv8v_QlHWETHwEJdXXiY2Xq5LgXDSwEhhdDZHSMQYDuvhp_P6nl2LNqqUvJkjoFWcnn2btgSIUQROIaDdxtx7_2h4oUi5u11BGSF2SZZiEpDAKT08Htv3uwXdwDA6ll99fbi8X8RmH5oY_tIZTeIzu50qHxElPewoYO8QrJYsO9oFcCPMHGxYWjXQEa-QZYgo 0wS9zRIkeJc5kshc4-9Uhv2DVIjk_-ofGlML9ieggGyillBKptw，kid：GRF55Lbzgg4sANCmER-sm55eX_qUOpY8UTptDmDG_6U，kty：RSA，use：sig}]} 
  

我认为这是关键：

  ok6rvXu95337IxsDXrKzlIqw_I_zPDG8JyEw2CTOtNMoDi1QzpXQVMGj2snNEmvNYaCTmFf51I-EDgeFLLexr40jzBXlg72quV4aw4yiNuxkigW0gMA92OmaT2jMRIdDZM8mVokoxyPfLub2YnXHFq0XuUUgkX_TlutVhgGbyPN0M12teYZtMYo2AUzIRggONhHvnibHP0CPWDjCwSfp3On1Recn4DPxbn3DuGslF2myalmCtkujNcrhHLhwYPP-yZFb8e0XSNTcQvXaQxAqmnWH6NXcOtaeWMQe43PNTAyNinhndgI8ozG3Hz -1NzHssDH_yk6UYFSszhDbWAzyqw 
 
 VAR键= ok6rvXu95337IxsDXrKzlIqw_I_zPDG8JyEw2CTOtNMoDi1QzpXQVMGj2snNEmvNYaCTmFf51I-EDgeFLLexr40jzBXlg72quV4aw4yiNuxkigW0gMA92OmaT2jMRIdDZM8mVokoxyPfLub2YnXHFq0XuUUgkX_TlutVhgGbyPN0M12teYZtMYo2AUzIRggONhHvnibHP0CPWDjCwSfp3On1Recn4DPxbn3DuGslF2myalmCtkujNcrhHLhwYPP-yZFb8e0XSNTcQvXaQxAqmnWH6NXcOtaeWMQe43PNTAyNinhndgI8ozG3Hz-1NzHssDH_yk6UYFSszhDbWAzyqw 
  

如果任何人都可以将我指向正确的方向在GO语言中这样做将不胜感激。我也会把它放在Go Lang操场上，以便其他人可以使用它。

rsa.PublicKey ，可以按原样使用。由于您想将其编码为pem编码的x.509，因此您可以使用 x509.MarshalPKIXPublicKey 函数来封送der block，并使用pem软件包进行编码。

$ b 将您的示例中的第一个键解组为 jwk ：

  //将base64字节解码为n 
 nb，err：= base64.RawURLEncoding.DecodeString（jwk [n]）
 if err！ = nil {
 log.Fatal（err）
} 
 
e：= 65537 
 //默认指数通常是65537，所以只需比较
 // base64 for [1,0,1] or [0,1,0,1] 
 if jwk [e]！=AQAB&& jwk [e]！=AAEAAQ{
 //仍然需要解码big-endian int 
 log.Fatal（需要deocde e：，jwk [e]） 
} 
 
 pk：=& rsa.PublicKey {
 N：new（big.Int）.SetBytes（nb），
 E：e，
 
 $ b $ der，err：= x509.MarshalPKIXPublicKey（pk）
 if err！= nil {
 log.Fatal（err）
} 
 
 block：=& pem.Block {
类型：RSA PUBLIC KEY，
字节：der，
} 
 
 var out字节.Buffer 
 pem.Encode（& out，block）
 fmt.Println（out.String（））
  

这将输出：

  ----- BEGIN RSA PUBLIC KEY ---- -  
 MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAok6rvXu95337IxsDXrKz 
 lIqw / I / zPDG8JyEw2CTOtNMoDi1QzpXQVMGj2snNEmvNYaCTmFf51I + EDgeFLLex 
 r40jzBXlg72quV4aw4yiNuxkigW0gMA92OmaT2jMRIdDZM8mVokoxyPfLub2YnXH 
 Fq0XuUUgkX / TlutVhgGbyPN0M12teYZtMYo2AUzIRggONhHvnibHP0CPWDjCwSfp 
 3On1Recn4DPxbn3DuGslF2myalmCtkujNcrhHLhwYPP + yZFb8e0XSNTcQvXaQxAq 
 mnWH6 NXcOtaeWMQe43PNTAyNinhndgI8ozG3Hz + 1NzHssDH / yk6UYFSszhDbWAzy 
 qwIDAQAB 
 ----- END RSA PUBLIC KEY ----- 
  

https://play.golang.org/p/Ch6Nr9F6Ik

I have seen a lot of examples of how to convert a X.509 to Exponent Modulus, but I have not seen the reverse.

The values I have from my key endpoint look like this:

{"keys":    [{"alg":"RS256","e":"AQAB","n":"ok6rvXu95337IxsDXrKzlIqw_I_zPDG8JyEw2CTOtNMoDi1QzpXQVMGj2snNEmvNYaCTmFf51I-EDgeFLLexr40jzBXlg72quV4aw4yiNuxkigW0gMA92OmaT2jMRIdDZM8mVokoxyPfLub2YnXHFq0XuUUgkX_TlutVhgGbyPN0M12teYZtMYo2AUzIRggONhHvnibHP0CPWDjCwSfp3On1Recn4DPxbn3DuGslF2myalmCtkujNcrhHLhwYPP-yZFb8e0XSNTcQvXaQxAqmnWH6NXcOtaeWMQe43PNTAyNinhndgI8ozG3Hz-1NzHssDH_yk6UYFSszhDbWAzyqw","kid":"wyMwK4A6CL9Qw11uofVeyQ119XyX-xykymkkXygZ5OM","kty":"RSA","use":"sig"},{"alg":"RS256","e":"AQAB","n":"nXv6FSAcMjuanQ2hIIUb8Vkqe94t98kPh2T8-0j6-Jq8pOclgKdtVeIZcBE9F_XiuJvg4b6WVs-uvA-pS8mmMvQ21xU5Q_37Cojv8v_QlHWETHwEJdXXiY2Xq5LgXDSwEhhdDZHSMQYDuvhp_P6nl2LNqqUvJkjoFWcnn2btgSIUQROIaDdxtx7_2h4oUi5u11BGSF2SZZiEpDAKT08Htv3uwXdwDA6ll99fbi8X8RmH5oY_tIZTeIzu50qHxElPewoYO8QrJYsO9oFcCPMHGxYWjXQEa-QZYgo0wS9zRIkeJc5kshc4-9Uhv2DVIjk_-ofGlML9ieggGyillBKptw","kid":"GRF55Lbzgg4sANCmER-sm55eX_qUOpY8UTptDmDG_6U","kty":"RSA","use":"sig"}]}

I think this is the Key:

ok6rvXu95337IxsDXrKzlIqw_I_zPDG8JyEw2CTOtNMoDi1QzpXQVMGj2snNEmvNYaCTmFf51I-EDgeFLLexr40jzBXlg72quV4aw4yiNuxkigW0gMA92OmaT2jMRIdDZM8mVokoxyPfLub2YnXHFq0XuUUgkX_TlutVhgGbyPN0M12teYZtMYo2AUzIRggONhHvnibHP0CPWDjCwSfp3On1Recn4DPxbn3DuGslF2myalmCtkujNcrhHLhwYPP-yZFb8e0XSNTcQvXaQxAqmnWH6NXcOtaeWMQe43PNTAyNinhndgI8ozG3Hz-1NzHssDH_yk6UYFSszhDbWAzyqw

var key = "ok6rvXu95337IxsDXrKzlIqw_I_zPDG8JyEw2CTOtNMoDi1QzpXQVMGj2snNEmvNYaCTmFf51I-EDgeFLLexr40jzBXlg72quV4aw4yiNuxkigW0gMA92OmaT2jMRIdDZM8mVokoxyPfLub2YnXHFq0XuUUgkX_TlutVhgGbyPN0M12teYZtMYo2AUzIRggONhHvnibHP0CPWDjCwSfp3On1Recn4DPxbn3DuGslF2myalmCtkujNcrhHLhwYPP-yZFb8e0XSNTcQvXaQxAqmnWH6NXcOtaeWMQe43PNTAyNinhndgI8ozG3Hz-1NzHssDH_yk6UYFSszhDbWAzyqw"

If anyone can point me in the right direction to do this in the GO language would be appreciated. I'll also put it on the Go Lang playground so others can use it.

解决方案

You can put the values directly into an rsa.PublicKey, which can be used as is. Since you want to encode that as a pem encoded x.509, you can use the x509.MarshalPKIXPublicKey function to marshal the der block, and encode that with the pem package.

After unmarshaling the first key in your example to jwk:

// decode the base64 bytes for n
nb, err := base64.RawURLEncoding.DecodeString(jwk["n"])
if err != nil {
    log.Fatal(err)
}

e := 65537
// The default exponent is usually 65537, so just compare the
// base64 for [1,0,1] or [0,1,0,1]
if jwk["e"] != "AQAB" && jwk["e"] != "AAEAAQ" {
    // still need to decode the big-endian int
    log.Fatal("need to deocde e:", jwk["e"])
}

pk := &rsa.PublicKey{
    N: new(big.Int).SetBytes(nb),
    E: e,
}

der, err := x509.MarshalPKIXPublicKey(pk)
if err != nil {
    log.Fatal(err)
}

block := &pem.Block{
    Type:  "RSA PUBLIC KEY",
    Bytes: der,
}

var out bytes.Buffer
pem.Encode(&out, block)
fmt.Println(out.String())

Which will output:

-----BEGIN RSA PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAok6rvXu95337IxsDXrKz
lIqw/I/zPDG8JyEw2CTOtNMoDi1QzpXQVMGj2snNEmvNYaCTmFf51I+EDgeFLLex
r40jzBXlg72quV4aw4yiNuxkigW0gMA92OmaT2jMRIdDZM8mVokoxyPfLub2YnXH
Fq0XuUUgkX/TlutVhgGbyPN0M12teYZtMYo2AUzIRggONhHvnibHP0CPWDjCwSfp
3On1Recn4DPxbn3DuGslF2myalmCtkujNcrhHLhwYPP+yZFb8e0XSNTcQvXaQxAq
mnWH6NXcOtaeWMQe43PNTAyNinhndgI8ozG3Hz+1NzHssDH/yk6UYFSszhDbWAzy
qwIDAQAB
-----END RSA PUBLIC KEY-----

https://play.golang.org/p/Ch6Nr9F6Ik

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