PHP8 OpenSSL 签名算法
OPENSSL_ALGO_DSS1
(int)OPENSSL_ALGO_SHA1
(int)OPENSSL_ALGO_SHA224
(int)OPENSSL_ALGO_SHA256
(int)OPENSSL_ALGO_SHA384
(int)OPENSSL_ALGO_SHA512
(int)OPENSSL_ALGO_RMD160
(int)OPENSSL_ALGO_MD5
(int)OPENSSL_ALGO_MD4
(int)OPENSSL_ALGO_MD2
(int)