All the environment variables set by this module are: HTTPS: can be "on" or "off" SSL_VERSION_LIBRARY: The version of the gnutls library SSL_VERSION_INTERFACE: The version of this module SSL_PROTOCOL: The SSL or TLS protocol name (such as "TLS 1.0" etc.) SSL_CIPHER: The SSL or TLS cipher suite name. SSL_COMPRESS_METHOD: The negotiated compression method (NULL or DEFLATE) SSL_SRP_USER: The SRP username used for authentication. SSL_CIPHER_USEKEYSIZE and SSL_CIPHER_ALGKEYSIZE: The number if bits used in the used cipher algorithm. This does not fully reflect the security level since the size of RSA or DHE key exchange parameters affect the security level too. SSL_CIPHER_EXPORT: true or false. Whether the cipher suite negotiated is an export one. SSL_SESSION_ID: The session ID negotiated in this session. Can be the same during client reloads. SSL_CLIENT_V_REMAIN: The number of days until the client's certificate is expired. SSL_CLIENT_V_START: The activation time of client's certificate. SSL_CLIENT_V_END: The expiration time of client's certificate. SSL_CLIENT_S_DN: The distinguished name of client's certificate in RFC2253 format. SSL_CLIENT_I_DN: The distinguished name of client's issuer certificate in RFC2253 format. SSL_CLIENT_S_SAN%: These will contain the alternative names of the client certificate (% is a number starting from zero). The values will be prepended by "DNSNAME:", "RFC822NAME:" or "URI:" depending on the type. If it is not supported the value "UNSUPPORTED" will be set. SSL_CLIENT_M_SERIAL: The serial number of the client's certificate. SSL_CLIENT_M_VERSION: The version of the client's certificate. SSL_CLIENT_A_SIG: The algorithm used for the signature in client's certificate. SSL_CLIENT_A_KEY: The public key algorithm in client's certificate. SSL_CLIENT_CERT: The PEM-encoded client certificate SSL_CLIENT_VERIFY: whether the client's certificate was verified. (NONE if none was sent, or SUCCESS or FAILED) SSL_CLIENT_S_TYPE: The certificate type can be X.509 or OPENPGP. SSL_SERVER_V_START: The activation time of server's certificate. SSL_SERVER_V_END: The expiration time of server's certificate. SSL_SERVER_S_DN: The distinguished name of the server's certificate in RFC2253 format. SSL_SERVER_I_DN: The distinguished name of the server's issuer certificate in RFC2253 format. SSL_SERVER_S_SAN%: These will contain the alternative names of the server certificate (% is a number starting from zero). The values will be prepended by "DNSNAME:", "RFC822NAME:" or "URI:" depending on the type. If it is not supported the value "UNSUPPORTED" will be set. SSL_SERVER_M_SERIAL: The serial number of the server's certificate. SSL_SERVER_M_VERSION: The version of the server's certificate. SSL_SERVER_A_SIG: The algorithm used for the signature in server's certificate. SSL_SERVER_A_KEY: The public key algorithm in server's certificate. SSL_SERVER_CERT: The PEM-encoded server certificate SSL_SERVER_S_TYPE: The certificate type can be X.509 or OPENPGP.