Java 从PKCS7中提取CSR

Java 从PKCS7中提取CSR,java,security,bouncycastle,pkcs#7,pkcs#10,Java,Security,Bouncycastle,Pkcs#7,Pkcs#10,有一个要求,我必须从我拥有的PKCS7 pem格式字符串中提取PKCS10(CSR)。虽然我可以阅读PKCS7的内容,但我看到它只是一个证书,而不是CSR 我还使用运行了pem字符串,以查看它由什么组成。我只能看到一张有效的证书。 有没有办法从下面的pem格式字符串中获取CSR -----BEGIN CERTIFICATE----- MIIIjAYJKoZIhvcNAQcCoIIIfTCCCHkCAQExDzANBglghkgBZQMEAgEFADCCAyoG CSqGSIb3DQEHAaCCA

有一个要求,我必须从我拥有的PKCS7 pem格式字符串中提取PKCS10(CSR)。虽然我可以阅读PKCS7的内容,但我看到它只是一个证书,而不是CSR

我还使用运行了pem字符串,以查看它由什么组成。我只能看到一张有效的证书。 有没有办法从下面的pem格式字符串中获取CSR

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-----END CERTIFICATE-----

由于您有证书,您只需获取证书中包含的信息(主题、公钥等)即可填写CSR 但是,由于您没有与此公钥关联的私钥,因此无法对CSR进行签名