从Erlang中的RSA私钥生成x509公钥

Question

我正在Erlang中创建一个应用程序，给定一个RSA私钥，它可以返回RSA公钥和与该priv密钥相关联的x509公钥。

--from OTP-PUB-KEY.hrl
-record('RSAPrivateKey',{
version, modulus, publicExponent, privateExponent, prime1, prime2, exponent1, exponent2,     coefficient, otherPrimeInfos = asn1_NOVALUE}).

-record('RSAPublicKey',{
modulus, publicExponent}).  

$private = Crypt::OpenSSL::RSA->new_private_key( $hash_ref->{'private'} );
{rsa  => $private->get_public_key_string(),
 x509 => $private->get_public_key_x509_string()};

----只是一个更新----

在花了一些时间了解x509并阅读了Erlang public_key文档后，我找到了一个解决方案：

如果我可以通过简单地获取模数和publicExponent，从“RSaprivateKey”生成“RSapublicKey”，那么生成这两个键的代码如下所示：

getPublicKeysFromPrivateKey(#'RSAPrivateKey'{modulus = M, publicExponent = PE}) ->
    RSAPub = #'RSAPublicKey'{modulus = M, publicExponent = PE},

    %% Encoding the keys
    RSAPublicKey = public_key:pem_encode([public_key:pem_entry_encode('RSAPublicKey', RSAPub)]),
    X509PublicKey = public_key:pem_encode([public_key:pem_entry_encode('SubjectPublicKeyInfo', RSAPub)]),

    [{rsa, RSAPublicKey},{x509, X509PublicKey}].

[{rsa,<<"-----BEGIN RSA PUBLIC KEY----- \nMIGJAoGBAMU8ZcQ4S+gHDuZd6cEdqbf9l1Hw4fxQrJ455B2kJRUwyKidVbCH2omy\nI0SLNu92"...>>},
 {x509,<<"-----BEGIN PUBLIC KEY-----\nMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDFPGXEOEvoBw7mXenBHam3/ZdR\n8OH8UKye"...>>}]

谢了。

Answer 1

显而易见的是：

public_key(#'RSAPrivateKey'{modulus = Mod, publicExponent = Exp}) ->
    #'RSAPublicKey'{modulus = Mod, publicExponent = Exp}.

它似乎产生了一个有效的记录，来自：

public_key(public_key:pem_entry_decode(hd(public_key:pem_decode(element(2, file:read_file("<OTP Src Dir>/lib/public_key/test/public_key_SUITE_data/server_key.pem")))))).