cipher() = null
| rc4_128
| idea_cbc
| des40_cbc
| des_cbc
| '3des_ede_cbc'
| aes_128_cbc
| aes_256_cbc
cipher_enum() = integer()
cipher_suite() = binary()
hash() = null | sha | md5 | sha224 | sha256 | sha384 | sha512
key_algo() = null
| rsa
| dhe_rsa
| dhe_dss
| ecdhe_ecdsa
| ecdh_ecdsa
| ecdh_rsa
| srp_rsa
| srp_dss
| psk
| dhe_psk
| rsa_psk
| dh_anon
| ecdh_anon
| srp_anon
openssl_cipher_suite() = string()