如何知道 x509 证书是否由 RSA 签名？

Question

了解 x509 Certificate 是否被 RSA 签名的最佳方法是什么？

意思是，通过哪个文件头可以知道那个信息？

Answer 1

就运行

openssl x509 -text -noout -in yourcertfile.pem

Signature Algorithm 属性将显示证书的签名方式：

Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number: 13 (0xd)
    Signature Algorithm: sha1WithRSAEncryption
        Issuer: C=XX, L=XXXXXX, O=XXXXXX, OU=XXXXXX, CN=XXXXXX
        Validity: 
            Not Before: XXX XX XX:XX:XX XXXX GMT
            Not Before: XXX XX XX:XX:XX XXXX GMT
            ....

如何知道 x509 证书是否由 RSA 签名？

How to know if x509 certificate is signed by RSA?

java

ssl

rsa

x509certificate