SSL (Apache Tomcat 9.0.37 API Documentation)

org.apache.tomcat.jni

## Class SSL

- java.lang.Object
- - org.apache.tomcat.jni.SSL

-     public final class SSL
      extends Object

  SSL
  Author:
    Mladen Turk

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static int` | `SSL_AIDX_DSA`
    `static int` | `SSL_AIDX_ECC`
    `static int` | `SSL_AIDX_MAX`
    `static int` | `SSL_AIDX_RSA`
    `static int` | `SSL_ALGO_ALL`
    `static int` | `SSL_ALGO_DSA`
    `static int` | `SSL_ALGO_RSA`
    `static int` | `SSL_ALGO_UNKNOWN`
    `static int` | `SSL_CONF_FLAG_CERTIFICATE`
    `static int` | `SSL_CONF_FLAG_CLIENT`
    `static int` | `SSL_CONF_FLAG_CMDLINE`
    `static int` | `SSL_CONF_FLAG_FILE`
    `static int` | `SSL_CONF_FLAG_SERVER`
    `static int` | `SSL_CONF_FLAG_SHOW_ERRORS`
    `static int` | `SSL_CONF_TYPE_DIR`
    `static int` | `SSL_CONF_TYPE_FILE`
    `static int` | `SSL_CONF_TYPE_STRING`
    `static int` | `SSL_CONF_TYPE_UNKNOWN`
    `static int` | `SSL_CRT_FORMAT_ASN1`
    `static int` | `SSL_CRT_FORMAT_ENGINE`
    `static int` | `SSL_CRT_FORMAT_NETSCAPE`
    `static int` | `SSL_CRT_FORMAT_PEM`
    `static int` | `SSL_CRT_FORMAT_PKCS12`
    `static int` | `SSL_CRT_FORMAT_SMIME`
    `static int` | `SSL_CRT_FORMAT_TEXT`
    `static int` | `SSL_CRT_FORMAT_UNDEF`
    `static int` | `SSL_CVERIFY_NONE`
    `static int` | `SSL_CVERIFY_OPTIONAL`
    `static int` | `SSL_CVERIFY_OPTIONAL_NO_CA`
    `static int` | `SSL_CVERIFY_REQUIRE`
    `static int` | `SSL_CVERIFY_UNSET`
    `static int` | `SSL_ERROR_NONE`
    `static int` | `SSL_ERROR_SSL`
    `static int` | `SSL_ERROR_SYSCALL`
    `static int` | `SSL_ERROR_WANT_ACCEPT`
    `static int` | `SSL_ERROR_WANT_CONNECT`
    `static int` | `SSL_ERROR_WANT_READ`
    `static int` | `SSL_ERROR_WANT_WRITE`
    `static int` | `SSL_ERROR_WANT_X509_LOOKUP`
    `static int` | `SSL_ERROR_ZERO_RETURN`
    `static int` | `SSL_INFO_CIPHER`
    `static int` | `SSL_INFO_CIPHER_ALGKEYSIZE`
    `static int` | `SSL_INFO_CIPHER_DESCRIPTION`
    `static int` | `SSL_INFO_CIPHER_USEKEYSIZE`
    `static int` | `SSL_INFO_CIPHER_VERSION`
    `static int` | `SSL_INFO_CLIENT_A_KEY`
    `static int` | `SSL_INFO_CLIENT_A_SIG`
    `static int` | `SSL_INFO_CLIENT_CERT`
    `static int` | `SSL_INFO_CLIENT_CERT_CHAIN`
    `static int` | `SSL_INFO_CLIENT_I_DN`
    `static int` | `SSL_INFO_CLIENT_M_SERIAL`
    `static int` | `SSL_INFO_CLIENT_M_VERSION`
    `static int` | `SSL_INFO_CLIENT_S_DN`
    `static int` | `SSL_INFO_CLIENT_V_END`
    `static int` | `SSL_INFO_CLIENT_V_REMAIN`
    `static int` | `SSL_INFO_CLIENT_V_START`
    `static int` | `SSL_INFO_DN_COMMONNAME`
    `static int` | `SSL_INFO_DN_COUNTRYNAME`
    `static int` | `SSL_INFO_DN_DESCRIPTION`
    `static int` | `SSL_INFO_DN_EMAILADDRESS`
    `static int` | `SSL_INFO_DN_GIVENNAME`
    `static int` | `SSL_INFO_DN_INITIALS`
    `static int` | `SSL_INFO_DN_LOCALITYNAME`
    `static int` | `SSL_INFO_DN_ORGANIZATIONALUNITNAME`
    `static int` | `SSL_INFO_DN_ORGANIZATIONNAME`
    `static int` | `SSL_INFO_DN_STATEORPROVINCENAME`
    `static int` | `SSL_INFO_DN_SURNAME`
    `static int` | `SSL_INFO_DN_TITLE`
    `static int` | `SSL_INFO_DN_UNIQUEIDENTIFIER`
    `static int` | `SSL_INFO_PROTOCOL`
    `static int` | `SSL_INFO_SERVER_A_KEY`
    `static int` | `SSL_INFO_SERVER_A_SIG`
    `static int` | `SSL_INFO_SERVER_CERT`
    `static int` | `SSL_INFO_SERVER_I_DN`
    `static int` | `SSL_INFO_SERVER_M_SERIAL`
    `static int` | `SSL_INFO_SERVER_M_VERSION`
    `static int` | `SSL_INFO_SERVER_S_DN`
    `static int` | `SSL_INFO_SERVER_V_END`
    `static int` | `SSL_INFO_SERVER_V_START`
    `static int` | `SSL_INFO_SESSION_ID`
    `static int` | `SSL_MODE_CLIENT`
    `static int` | `SSL_MODE_COMBINED`
    `static int` | `SSL_MODE_SERVER`
    `static int` | `SSL_OP_ALL`
    `static int` | `SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION`
    `static int` | `SSL_OP_CIPHER_SERVER_PREFERENCE`
    `static int` | `SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS`
    `static int` | `SSL_OP_EPHEMERAL_RSA`
    `static int` | `SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER`
    `static int` | `SSL_OP_MICROSOFT_SESS_ID_BUG`
    `static int` | `SSL_OP_MSIE_SSLV2_RSA_PADDING`
    `static int` | `SSL_OP_NETSCAPE_CA_DN_BUG`
    `static int` | `SSL_OP_NETSCAPE_CHALLENGE_BUG`
    `static int` | `SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG`
    `static int` | `SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG`
    `static int` | `SSL_OP_NO_COMPRESSION`
    `static int` | `SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION`
    `static int` | `SSL_OP_NO_SSLv2`
    `static int` | `SSL_OP_NO_SSLv3`
    `static int` | `SSL_OP_NO_TICKET`
    `static int` | `SSL_OP_NO_TLSv1`
    `static int` | `SSL_OP_NO_TLSv1_1`
    `static int` | `SSL_OP_NO_TLSv1_2`
    `static int` | `SSL_OP_PKCS1_CHECK_1` Deprecated. Unsupported in the current version of OpenSSL
    `static int` | `SSL_OP_PKCS1_CHECK_2` Deprecated. Unsupported in the current version of OpenSSL
    `static int` | `SSL_OP_SINGLE_DH_USE`
    `static int` | `SSL_OP_SINGLE_ECDH_USE`
    `static int` | `SSL_OP_SSLEAY_080_CLIENT_DH_BUG`
    `static int` | `SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG`
    `static int` | `SSL_OP_TLS_BLOCK_PADDING_BUG`
    `static int` | `SSL_OP_TLS_D5_BUG`
    `static int` | `SSL_OP_TLS_ROLLBACK_BUG`
    `static int` | `SSL_OPT_ALL`
    `static int` | `SSL_OPT_EXPORTCERTDATA`
    `static int` | `SSL_OPT_FAKEBASICAUTH`
    `static int` | `SSL_OPT_NONE`
    `static int` | `SSL_OPT_OPTRENEGOTIATE`
    `static int` | `SSL_OPT_RELSET`
    `static int` | `SSL_OPT_STDENVVARS`
    `static int` | `SSL_OPT_STRICTREQUIRE`
    `static int` | `SSL_PROTOCOL_ALL`
    `static int` | `SSL_PROTOCOL_NONE`
    `static int` | `SSL_PROTOCOL_SSLV2`
    `static int` | `SSL_PROTOCOL_SSLV3`
    `static int` | `SSL_PROTOCOL_TLSV1`
    `static int` | `SSL_PROTOCOL_TLSV1_1`
    `static int` | `SSL_PROTOCOL_TLSV1_2`
    `static int` | `SSL_PROTOCOL_TLSV1_3`
    `static int` | `SSL_RECEIVED_SHUTDOWN`
    `static int` | `SSL_SELECTOR_FAILURE_CHOOSE_MY_LAST_PROTOCOL`
    `static int` | `SSL_SELECTOR_FAILURE_NO_ADVERTISE`
    `static int` | `SSL_SENT_SHUTDOWN`
    `static long` | `SSL_SESS_CACHE_OFF`
    `static long` | `SSL_SESS_CACHE_SERVER`
    `static int` | `SSL_SHUTDOWN_TYPE_ACCURATE`
    `static int` | `SSL_SHUTDOWN_TYPE_STANDARD`
    `static int` | `SSL_SHUTDOWN_TYPE_UNCLEAN`
    `static int` | `SSL_SHUTDOWN_TYPE_UNSET`
    `static int` | `SSL_TMP_KEY_DH_1024`
    `static int` | `SSL_TMP_KEY_DH_2048`
    `static int` | `SSL_TMP_KEY_DH_4096`
    `static int` | `SSL_TMP_KEY_DH_512`
    `static int` | `SSL_TMP_KEY_MAX`
    `static int` | `SSL_TMP_KEY_RSA_1024`
    `static int` | `SSL_TMP_KEY_RSA_2048`
    `static int` | `SSL_TMP_KEY_RSA_4096`
    `static int` | `SSL_TMP_KEY_RSA_512`
    `static int` | `SSL_VERIFY_CLIENT_ONCE`
    `static int` | `SSL_VERIFY_FAIL_IF_NO_PEER_CERT`
    `static int` | `SSL_VERIFY_NONE`
    `static int` | `SSL_VERIFY_PEER`
    `static int` | `SSL_VERIFY_PEER_STRICT`
    `static int` | `UNSET`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `SSL()`

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static int` | `closeBIO(long bio)` Close BIO and dereference callback object
    `static int` | `doHandshake(long ssl)` SSL_do_handshake
    `static int` | `fipsModeGet()` Get the status of FIPS Mode.
    `static int` | `fipsModeSet(int mode)` Enable/Disable FIPS Mode.
    `static void` | `freeBIO(long bio)` BIO_free
    `static void` | `freeSSL(long ssl)` SSL_free
    `static String` | `getAlpnSelected(long ssl)` SSL_get0_alpn_selected
    `static String` | `getCipherForSSL(long ssl)` SSL_get_cipher.
    `static String[]` | `getCiphers(long ssl)` Returns all cipher suites that are enabled for negotiation in an SSL handshake.
    `static int` | `getError(long ssl, int ret)` SSL_get_error
    `static String` | `getErrorString(long errorNumber)` Get the error number representing for the given `errorNumber`.
    `static int` | `getHandshakeCount(long ssl)` Return the handshake completed count.
    `static String` | `getLastError()` Return last SSL error string
    `static int` | `getLastErrorNumber()` Get the error number representing the last error OpenSSL encountered on this thread.
    `static String` | `getNextProtoNegotiated(long ssl)` SSL_get0_next_proto_negotiated
    `static int` | `getOptions(long ssl)` Get OpenSSL Option.
    `static byte[][]` | `getPeerCertChain(long ssl)` Get the peer certificate chain or `null` if non was send.
    `static byte[]` | `getPeerCertificate(long ssl)` Get the peer certificate or `null` if non was send.
    `static int` | `getPostHandshakeAuthInProgress(long ssl)` Is post handshake authentication in progress on this connection?
    `static byte[]` | `getSessionId(long ssl)` Returns the ID of the session as byte array representation.
    `static int` | `getShutdown(long ssl)` SSL_get_shutdown
    `static long` | `getTime(long ssl)` SSL_get_time
    `static String` | `getVersion(long ssl)` SSL_get_version
    `static boolean` | `hasOp(int op)` Return true if all the requested SSL_OP_* are supported by OpenSSL.
    `static int` | `initialize(String engine)` Initialize OpenSSL support.
    `static int` | `isInInit(long ssl)` SSL_in_init.
    `static long` | `makeNetworkBIO(long ssl)` Wire up internal and network BIOs for the given SSL instance.
    `static long` | `newBIO(long pool, BIOCallback callback)` Initialize new BIO
    `static long` | `newSSL(long ctx, boolean server)` SSL_new
    `static int` | `pendingReadableBytesInSSL(long ssl)` SSL_pending.
    `static int` | `pendingWrittenBytesInBIO(long bio)` BIO_ctrl_pending.
    `static boolean` | `randLoad(String filename)` Add content of the file to the PRNG
    `static boolean` | `randMake(String filename, int len, boolean base64)` Creates random data to filename
    `static boolean` | `randSave(String filename)` Writes a number of random bytes (currently 1024) to file `filename` which can be used to initialize the PRNG by calling randLoad in a later session.
    `static void` | `randSet(String filename)` Sets global random filename.
    `static int` | `readFromBIO(long bio, long rbuf, int rlen)` BIO_read.
    `static int` | `readFromSSL(long ssl, long rbuf, int rlen)` SSL_read
    `static int` | `renegotiate(long ssl)` SSL_renegotiate
    `static int` | `renegotiatePending(long ssl)` SSL_renegotiate_pending
    `static void` | `setBIO(long ssl, long rbio, long wbio)` SSL_set_bio
    `static boolean` | `setCipherSuites(long ssl, String ciphers)` Returns the cipher suites available for negotiation in SSL handshake.
    `static void` | `setOptions(long ssl, int options)` Set OpenSSL Option.
    `static void` | `setPassword(String password)` Set global Password for decrypting certificates and keys.
    `static void` | `setPasswordCallback(PasswordCallback callback)` Set global Password callback for obtaining passwords.
    `static void` | `setShutdown(long ssl, int mode)` SSL_set_shutdown
    `static void` | `setVerify(long ssl, int level, int depth)` Set Type of Client Certificate verification and Maximum depth of CA Certificates in Client Certificate verification.
    `static int` | `shutdownSSL(long ssl)` SSL_shutdown
    `static int` | `verifyClientPostHandshake(long ssl)` SSL_verify_client_post_handshake
    `static int` | `version()`
    `static String` | `versionString()`
    `static int` | `writeToBIO(long bio, long wbuf, int wlen)` BIO_write.
    `static int` | `writeToSSL(long ssl, long wbuf, int wlen)` SSL_write.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### UNSET

          public static final int UNSET

      See Also:
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    - #### SSL_ALGO_UNKNOWN

          public static final int SSL_ALGO_UNKNOWN

      See Also:
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    - #### SSL_ALGO_RSA

          public static final int SSL_ALGO_RSA

      See Also:
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    - #### SSL_ALGO_DSA

          public static final int SSL_ALGO_DSA

      See Also:
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    - #### SSL_ALGO_ALL

          public static final int SSL_ALGO_ALL

      See Also:
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    - #### SSL_AIDX_RSA

          public static final int SSL_AIDX_RSA

      See Also:
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    - #### SSL_AIDX_DSA

          public static final int SSL_AIDX_DSA

      See Also:
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    - #### SSL_AIDX_ECC

          public static final int SSL_AIDX_ECC

      See Also:
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    - #### SSL_AIDX_MAX

          public static final int SSL_AIDX_MAX

      See Also:
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    - #### SSL_TMP_KEY_RSA_512

          public static final int SSL_TMP_KEY_RSA_512

      See Also:
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    - #### SSL_TMP_KEY_RSA_1024

          public static final int SSL_TMP_KEY_RSA_1024

      See Also:
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    - #### SSL_TMP_KEY_RSA_2048

          public static final int SSL_TMP_KEY_RSA_2048

      See Also:
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    - #### SSL_TMP_KEY_RSA_4096

          public static final int SSL_TMP_KEY_RSA_4096

      See Also:
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    - #### SSL_TMP_KEY_DH_512

          public static final int SSL_TMP_KEY_DH_512

      See Also:
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    - #### SSL_TMP_KEY_DH_1024

          public static final int SSL_TMP_KEY_DH_1024

      See Also:
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    - #### SSL_TMP_KEY_DH_2048

          public static final int SSL_TMP_KEY_DH_2048

      See Also:
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    - #### SSL_TMP_KEY_DH_4096

          public static final int SSL_TMP_KEY_DH_4096

      See Also:
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    - #### SSL_TMP_KEY_MAX

          public static final int SSL_TMP_KEY_MAX

      See Also:
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    - #### SSL_OPT_NONE

          public static final int SSL_OPT_NONE

      See Also:
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    - #### SSL_OPT_RELSET

          public static final int SSL_OPT_RELSET

      See Also:
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    - #### SSL_OPT_STDENVVARS

          public static final int SSL_OPT_STDENVVARS

      See Also:
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    - #### SSL_OPT_EXPORTCERTDATA

          public static final int SSL_OPT_EXPORTCERTDATA

      See Also:
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    - #### SSL_OPT_FAKEBASICAUTH

          public static final int SSL_OPT_FAKEBASICAUTH

      See Also:
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    - #### SSL_OPT_STRICTREQUIRE

          public static final int SSL_OPT_STRICTREQUIRE

      See Also:
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    - #### SSL_OPT_OPTRENEGOTIATE

          public static final int SSL_OPT_OPTRENEGOTIATE

      See Also:
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    - #### SSL_OPT_ALL

          public static final int SSL_OPT_ALL

      See Also:
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    - #### SSL_PROTOCOL_NONE

          public static final int SSL_PROTOCOL_NONE

      See Also:
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    - #### SSL_PROTOCOL_SSLV2

          public static final int SSL_PROTOCOL_SSLV2

      See Also:
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    - #### SSL_PROTOCOL_SSLV3

          public static final int SSL_PROTOCOL_SSLV3

      See Also:
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    - #### SSL_PROTOCOL_TLSV1

          public static final int SSL_PROTOCOL_TLSV1

      See Also:
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    - #### SSL_PROTOCOL_TLSV1_1

          public static final int SSL_PROTOCOL_TLSV1_1

      See Also:
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    - #### SSL_PROTOCOL_TLSV1_2

          public static final int SSL_PROTOCOL_TLSV1_2

      See Also:
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    - #### SSL_PROTOCOL_TLSV1_3

          public static final int SSL_PROTOCOL_TLSV1_3

      See Also:
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    - #### SSL_PROTOCOL_ALL

          public static final int SSL_PROTOCOL_ALL

    - #### SSL_CVERIFY_UNSET

          public static final int SSL_CVERIFY_UNSET

      See Also:
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    - #### SSL_CVERIFY_NONE

          public static final int SSL_CVERIFY_NONE

      See Also:
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    - #### SSL_CVERIFY_OPTIONAL

          public static final int SSL_CVERIFY_OPTIONAL

      See Also:
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    - #### SSL_CVERIFY_REQUIRE

          public static final int SSL_CVERIFY_REQUIRE

      See Also:
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    - #### SSL_CVERIFY_OPTIONAL_NO_CA

          public static final int SSL_CVERIFY_OPTIONAL_NO_CA

      See Also:
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    - #### SSL_VERIFY_NONE

          public static final int SSL_VERIFY_NONE

      See Also:
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    - #### SSL_VERIFY_PEER

          public static final int SSL_VERIFY_PEER

      See Also:
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    - #### SSL_VERIFY_FAIL_IF_NO_PEER_CERT

          public static final int SSL_VERIFY_FAIL_IF_NO_PEER_CERT

      See Also:
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    - #### SSL_VERIFY_CLIENT_ONCE

          public static final int SSL_VERIFY_CLIENT_ONCE

      See Also:
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    - #### SSL_VERIFY_PEER_STRICT

          public static final int SSL_VERIFY_PEER_STRICT

      See Also:
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    - #### SSL_OP_MICROSOFT_SESS_ID_BUG

          public static final int SSL_OP_MICROSOFT_SESS_ID_BUG

      See Also:
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    - #### SSL_OP_NETSCAPE_CHALLENGE_BUG

          public static final int SSL_OP_NETSCAPE_CHALLENGE_BUG

      See Also:
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    - #### SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG

          public static final int SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG

      See Also:
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    - #### SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG

          public static final int SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG

      See Also:
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    - #### SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER

          public static final int SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER

      See Also:
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    - #### SSL_OP_MSIE_SSLV2_RSA_PADDING

          public static final int SSL_OP_MSIE_SSLV2_RSA_PADDING

      See Also:
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    - #### SSL_OP_SSLEAY_080_CLIENT_DH_BUG

          public static final int SSL_OP_SSLEAY_080_CLIENT_DH_BUG

      See Also:
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    - #### SSL_OP_TLS_D5_BUG

          public static final int SSL_OP_TLS_D5_BUG

      See Also:
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    - #### SSL_OP_TLS_BLOCK_PADDING_BUG

          public static final int SSL_OP_TLS_BLOCK_PADDING_BUG

      See Also:
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    - #### SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS

          public static final int SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS

      See Also:
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    - #### SSL_OP_ALL

          public static final int SSL_OP_ALL

      See Also:
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    - #### SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION

          public static final int SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION

      See Also:
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    - #### SSL_OP_NO_COMPRESSION

          public static final int SSL_OP_NO_COMPRESSION

      See Also:
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    - #### SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION

          public static final int SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION

      See Also:
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    - #### SSL_OP_SINGLE_ECDH_USE

          public static final int SSL_OP_SINGLE_ECDH_USE

      See Also:
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    - #### SSL_OP_SINGLE_DH_USE

          public static final int SSL_OP_SINGLE_DH_USE

      See Also:
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    - #### SSL_OP_EPHEMERAL_RSA

          public static final int SSL_OP_EPHEMERAL_RSA

      See Also:
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    - #### SSL_OP_CIPHER_SERVER_PREFERENCE

          public static final int SSL_OP_CIPHER_SERVER_PREFERENCE

      See Also:
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    - #### SSL_OP_TLS_ROLLBACK_BUG

          public static final int SSL_OP_TLS_ROLLBACK_BUG

      See Also:
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    - #### SSL_OP_NO_SSLv2

          public static final int SSL_OP_NO_SSLv2

      See Also:
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    - #### SSL_OP_NO_SSLv3

          public static final int SSL_OP_NO_SSLv3

      See Also:
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    - #### SSL_OP_NO_TLSv1

          public static final int SSL_OP_NO_TLSv1

      See Also:
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    - #### SSL_OP_NO_TLSv1_2

          public static final int SSL_OP_NO_TLSv1_2

      See Also:
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    - #### SSL_OP_NO_TLSv1_1

          public static final int SSL_OP_NO_TLSv1_1

      See Also:
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    - #### SSL_OP_NO_TICKET

          public static final int SSL_OP_NO_TICKET

      See Also:
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    - #### SSL_OP_PKCS1_CHECK_1

          @Deprecated
          public static final int SSL_OP_PKCS1_CHECK_1

      Deprecated. Unsupported in the current version of OpenSSL
      See Also:
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    - #### SSL_OP_PKCS1_CHECK_2

          @Deprecated
          public static final int SSL_OP_PKCS1_CHECK_2

      Deprecated. Unsupported in the current version of OpenSSL
      See Also:
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    - #### SSL_OP_NETSCAPE_CA_DN_BUG

          public static final int SSL_OP_NETSCAPE_CA_DN_BUG

      See Also:
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    - #### SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG

          public static final int SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG

      See Also:
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    - #### SSL_CRT_FORMAT_UNDEF

          public static final int SSL_CRT_FORMAT_UNDEF

      See Also:
        Constant Field Values

    - #### SSL_CRT_FORMAT_ASN1

          public static final int SSL_CRT_FORMAT_ASN1

      See Also:
        Constant Field Values

    - #### SSL_CRT_FORMAT_TEXT

          public static final int SSL_CRT_FORMAT_TEXT

      See Also:
        Constant Field Values

    - #### SSL_CRT_FORMAT_PEM

          public static final int SSL_CRT_FORMAT_PEM

      See Also:
        Constant Field Values

    - #### SSL_CRT_FORMAT_NETSCAPE

          public static final int SSL_CRT_FORMAT_NETSCAPE

      See Also:
        Constant Field Values

    - #### SSL_CRT_FORMAT_PKCS12

          public static final int SSL_CRT_FORMAT_PKCS12

      See Also:
        Constant Field Values

    - #### SSL_CRT_FORMAT_SMIME

          public static final int SSL_CRT_FORMAT_SMIME

      See Also:
        Constant Field Values

    - #### SSL_CRT_FORMAT_ENGINE

          public static final int SSL_CRT_FORMAT_ENGINE

      See Also:
        Constant Field Values

    - #### SSL_MODE_CLIENT

          public static final int SSL_MODE_CLIENT

      See Also:
        Constant Field Values

    - #### SSL_MODE_SERVER

          public static final int SSL_MODE_SERVER

      See Also:
        Constant Field Values

    - #### SSL_MODE_COMBINED

          public static final int SSL_MODE_COMBINED

      See Also:
        Constant Field Values

    - #### SSL_CONF_FLAG_CMDLINE

          public static final int SSL_CONF_FLAG_CMDLINE

      See Also:
        Constant Field Values

    - #### SSL_CONF_FLAG_FILE

          public static final int SSL_CONF_FLAG_FILE

      See Also:
        Constant Field Values

    - #### SSL_CONF_FLAG_CLIENT

          public static final int SSL_CONF_FLAG_CLIENT

      See Also:
        Constant Field Values

    - #### SSL_CONF_FLAG_SERVER

          public static final int SSL_CONF_FLAG_SERVER

      See Also:
        Constant Field Values

    - #### SSL_CONF_FLAG_SHOW_ERRORS

          public static final int SSL_CONF_FLAG_SHOW_ERRORS

      See Also:
        Constant Field Values

    - #### SSL_CONF_FLAG_CERTIFICATE

          public static final int SSL_CONF_FLAG_CERTIFICATE

      See Also:
        Constant Field Values

    - #### SSL_CONF_TYPE_UNKNOWN

          public static final int SSL_CONF_TYPE_UNKNOWN

      See Also:
        Constant Field Values

    - #### SSL_CONF_TYPE_STRING

          public static final int SSL_CONF_TYPE_STRING

      See Also:
        Constant Field Values

    - #### SSL_CONF_TYPE_FILE

          public static final int SSL_CONF_TYPE_FILE

      See Also:
        Constant Field Values

    - #### SSL_CONF_TYPE_DIR

          public static final int SSL_CONF_TYPE_DIR

      See Also:
        Constant Field Values

    - #### SSL_SHUTDOWN_TYPE_UNSET

          public static final int SSL_SHUTDOWN_TYPE_UNSET

      See Also:
        Constant Field Values

    - #### SSL_SHUTDOWN_TYPE_STANDARD

          public static final int SSL_SHUTDOWN_TYPE_STANDARD

      See Also:
        Constant Field Values

    - #### SSL_SHUTDOWN_TYPE_UNCLEAN

          public static final int SSL_SHUTDOWN_TYPE_UNCLEAN

      See Also:
        Constant Field Values

    - #### SSL_SHUTDOWN_TYPE_ACCURATE

          public static final int SSL_SHUTDOWN_TYPE_ACCURATE

      See Also:
        Constant Field Values

    - #### SSL_INFO_SESSION_ID

          public static final int SSL_INFO_SESSION_ID

      See Also:
        Constant Field Values

    - #### SSL_INFO_CIPHER

          public static final int SSL_INFO_CIPHER

      See Also:
        Constant Field Values

    - #### SSL_INFO_CIPHER_USEKEYSIZE

          public static final int SSL_INFO_CIPHER_USEKEYSIZE

      See Also:
        Constant Field Values

    - #### SSL_INFO_CIPHER_ALGKEYSIZE

          public static final int SSL_INFO_CIPHER_ALGKEYSIZE

      See Also:
        Constant Field Values

    - #### SSL_INFO_CIPHER_VERSION

          public static final int SSL_INFO_CIPHER_VERSION

      See Also:
        Constant Field Values

    - #### SSL_INFO_CIPHER_DESCRIPTION

          public static final int SSL_INFO_CIPHER_DESCRIPTION

      See Also:
        Constant Field Values

    - #### SSL_INFO_PROTOCOL

          public static final int SSL_INFO_PROTOCOL

      See Also:
        Constant Field Values

    - #### SSL_INFO_CLIENT_S_DN

          public static final int SSL_INFO_CLIENT_S_DN

      See Also:
        Constant Field Values

    - #### SSL_INFO_CLIENT_I_DN

          public static final int SSL_INFO_CLIENT_I_DN

      See Also:
        Constant Field Values

    - #### SSL_INFO_SERVER_S_DN

          public static final int SSL_INFO_SERVER_S_DN

      See Also:
        Constant Field Values

    - #### SSL_INFO_SERVER_I_DN

          public static final int SSL_INFO_SERVER_I_DN

      See Also:
        Constant Field Values

    - #### SSL_INFO_DN_COUNTRYNAME

          public static final int SSL_INFO_DN_COUNTRYNAME

      See Also:
        Constant Field Values

    - #### SSL_INFO_DN_STATEORPROVINCENAME

          public static final int SSL_INFO_DN_STATEORPROVINCENAME

      See Also:
        Constant Field Values

    - #### SSL_INFO_DN_LOCALITYNAME

          public static final int SSL_INFO_DN_LOCALITYNAME

      See Also:
        Constant Field Values

    - #### SSL_INFO_DN_ORGANIZATIONNAME

          public static final int SSL_INFO_DN_ORGANIZATIONNAME

      See Also:
        Constant Field Values

    - #### SSL_INFO_DN_ORGANIZATIONALUNITNAME

          public static final int SSL_INFO_DN_ORGANIZATIONALUNITNAME

      See Also:
        Constant Field Values

    - #### SSL_INFO_DN_COMMONNAME

          public static final int SSL_INFO_DN_COMMONNAME

      See Also:
        Constant Field Values

    - #### SSL_INFO_DN_TITLE

          public static final int SSL_INFO_DN_TITLE

      See Also:
        Constant Field Values

    - #### SSL_INFO_DN_INITIALS

          public static final int SSL_INFO_DN_INITIALS

      See Also:
        Constant Field Values

    - #### SSL_INFO_DN_GIVENNAME

          public static final int SSL_INFO_DN_GIVENNAME

      See Also:
        Constant Field Values

    - #### SSL_INFO_DN_SURNAME

          public static final int SSL_INFO_DN_SURNAME

      See Also:
        Constant Field Values

    - #### SSL_INFO_DN_DESCRIPTION

          public static final int SSL_INFO_DN_DESCRIPTION

      See Also:
        Constant Field Values

    - #### SSL_INFO_DN_UNIQUEIDENTIFIER

          public static final int SSL_INFO_DN_UNIQUEIDENTIFIER

      See Also:
        Constant Field Values

    - #### SSL_INFO_DN_EMAILADDRESS

          public static final int SSL_INFO_DN_EMAILADDRESS

      See Also:
        Constant Field Values

    - #### SSL_INFO_CLIENT_M_VERSION

          public static final int SSL_INFO_CLIENT_M_VERSION

      See Also:
        Constant Field Values

    - #### SSL_INFO_CLIENT_M_SERIAL

          public static final int SSL_INFO_CLIENT_M_SERIAL

      See Also:
        Constant Field Values

    - #### SSL_INFO_CLIENT_V_START

          public static final int SSL_INFO_CLIENT_V_START

      See Also:
        Constant Field Values

    - #### SSL_INFO_CLIENT_V_END

          public static final int SSL_INFO_CLIENT_V_END

      See Also:
        Constant Field Values

    - #### SSL_INFO_CLIENT_A_SIG

          public static final int SSL_INFO_CLIENT_A_SIG

      See Also:
        Constant Field Values

    - #### SSL_INFO_CLIENT_A_KEY

          public static final int SSL_INFO_CLIENT_A_KEY

      See Also:
        Constant Field Values

    - #### SSL_INFO_CLIENT_CERT

          public static final int SSL_INFO_CLIENT_CERT

      See Also:
        Constant Field Values

    - #### SSL_INFO_CLIENT_V_REMAIN

          public static final int SSL_INFO_CLIENT_V_REMAIN

      See Also:
        Constant Field Values

    - #### SSL_INFO_SERVER_M_VERSION

          public static final int SSL_INFO_SERVER_M_VERSION

      See Also:
        Constant Field Values

    - #### SSL_INFO_SERVER_M_SERIAL

          public static final int SSL_INFO_SERVER_M_SERIAL

      See Also:
        Constant Field Values

    - #### SSL_INFO_SERVER_V_START

          public static final int SSL_INFO_SERVER_V_START

      See Also:
        Constant Field Values

    - #### SSL_INFO_SERVER_V_END

          public static final int SSL_INFO_SERVER_V_END

      See Also:
        Constant Field Values

    - #### SSL_INFO_SERVER_A_SIG

          public static final int SSL_INFO_SERVER_A_SIG

      See Also:
        Constant Field Values

    - #### SSL_INFO_SERVER_A_KEY

          public static final int SSL_INFO_SERVER_A_KEY

      See Also:
        Constant Field Values

    - #### SSL_INFO_SERVER_CERT

          public static final int SSL_INFO_SERVER_CERT

      See Also:
        Constant Field Values

    - #### SSL_INFO_CLIENT_CERT_CHAIN

          public static final int SSL_INFO_CLIENT_CERT_CHAIN

      See Also:
        Constant Field Values

    - #### SSL_SESS_CACHE_OFF

          public static final long SSL_SESS_CACHE_OFF

      See Also:
        Constant Field Values

    - #### SSL_SESS_CACHE_SERVER

          public static final long SSL_SESS_CACHE_SERVER

      See Also:
        Constant Field Values

    - #### SSL_SELECTOR_FAILURE_NO_ADVERTISE

          public static final int SSL_SELECTOR_FAILURE_NO_ADVERTISE

      See Also:
        Constant Field Values

    - #### SSL_SELECTOR_FAILURE_CHOOSE_MY_LAST_PROTOCOL

          public static final int SSL_SELECTOR_FAILURE_CHOOSE_MY_LAST_PROTOCOL

      See Also:
        Constant Field Values

    - #### SSL_SENT_SHUTDOWN

          public static final int SSL_SENT_SHUTDOWN

      See Also:
        Constant Field Values

    - #### SSL_RECEIVED_SHUTDOWN

          public static final int SSL_RECEIVED_SHUTDOWN

      See Also:
        Constant Field Values

    - #### SSL_ERROR_NONE

          public static final int SSL_ERROR_NONE

      See Also:
        Constant Field Values

    - #### SSL_ERROR_SSL

          public static final int SSL_ERROR_SSL

      See Also:
        Constant Field Values

    - #### SSL_ERROR_WANT_READ

          public static final int SSL_ERROR_WANT_READ

      See Also:
        Constant Field Values

    - #### SSL_ERROR_WANT_WRITE

          public static final int SSL_ERROR_WANT_WRITE

      See Also:
        Constant Field Values

    - #### SSL_ERROR_WANT_X509_LOOKUP

          public static final int SSL_ERROR_WANT_X509_LOOKUP

      See Also:
        Constant Field Values

    - #### SSL_ERROR_SYSCALL

          public static final int SSL_ERROR_SYSCALL

      See Also:
        Constant Field Values

    - #### SSL_ERROR_ZERO_RETURN

          public static final int SSL_ERROR_ZERO_RETURN

      See Also:
        Constant Field Values

    - #### SSL_ERROR_WANT_CONNECT

          public static final int SSL_ERROR_WANT_CONNECT

      See Also:
        Constant Field Values

    - #### SSL_ERROR_WANT_ACCEPT

          public static final int SSL_ERROR_WANT_ACCEPT

      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### SSL

          public SSL()

  - ### Method Detail

    - #### version

          public static int version()

    - #### versionString

          public static String versionString()

    - #### initialize

          public static int initialize(String engine)

      Initialize OpenSSL support. This function needs to be called once for the lifetime of JVM. Library.init() has to be called before.
      Parameters:
        `engine` - Support for external a Crypto Device ("engine"), usually a hardware accelerator card for crypto operations.
      Returns:
        APR status code

    - #### fipsModeGet

          public static int fipsModeGet()
                                 throws Exception

      Get the status of FIPS Mode.
      Returns:
        FIPS_mode return code. It is `0` if OpenSSL is not in FIPS mode, `1` if OpenSSL is in FIPS Mode.
      Throws:
        `Exception` - If tcnative was not compiled with FIPS Mode available.
      See Also:
        OpenSSL method FIPS_mode()

    - #### fipsModeSet

          public static int fipsModeSet(int mode)
                                 throws Exception

      Enable/Disable FIPS Mode.
      Parameters:
        `mode` - 1 - enable, 0 - disable
      Returns:
        FIPS_mode_set return code
      Throws:
        `Exception` - If tcnative was not compiled with FIPS Mode available, or if `FIPS_mode_set()` call returned an error value.
      See Also:
        OpenSSL method FIPS_mode_set()

    - #### randLoad

          public static boolean randLoad(String filename)

      Add content of the file to the PRNG
      Parameters:
        `filename` - Filename containing random data. If null the default file will be tested. The seed file is $RANDFILE if that environment variable is set, $HOME/.rnd otherwise. In case both files are unavailable builtin random seed generator is used.
      Returns:
        `true` if the operation was successful

    - #### randSave

          public static boolean randSave(String filename)

      Writes a number of random bytes (currently 1024) to file `filename` which can be used to initialize the PRNG by calling randLoad in a later session.
      Parameters:
        `filename` - Filename to save the data
      Returns:
        `true` if the operation was successful

    - #### randMake

          public static boolean randMake(String filename,
                                         int len,
                                         boolean base64)

      Creates random data to filename
      Parameters:
        `filename` - Filename to save the data
        `len` - The length of random sequence in bytes
        `base64` - Output the data in Base64 encoded format
      Returns:
        `true` if the operation was successful

    - #### randSet

          public static void randSet(String filename)

      Sets global random filename.
      Parameters:
        `filename` - Filename to use. If set it will be used for SSL initialization and all contexts where explicitly not set.

    - #### newBIO

          public static long newBIO(long pool,
                                    BIOCallback callback)
                             throws Exception

      Initialize new BIO
      Parameters:
        `pool` - The pool to use.
        `callback` - BIOCallback to use
      Returns:
        New BIO handle
      Throws:
        `Exception` - An error occurred

    - #### closeBIO

          public static int closeBIO(long bio)

      Close BIO and dereference callback object
      Parameters:
        `bio` - BIO to close and destroy.
      Returns:
        APR Status code

    - #### setPasswordCallback

          public static void setPasswordCallback(PasswordCallback callback)

      Set global Password callback for obtaining passwords.
      Parameters:
        `callback` - PasswordCallback implementation to use.

    - #### setPassword

          public static void setPassword(String password)

      Set global Password for decrypting certificates and keys.
      Parameters:
        `password` - Password to use.

    - #### getLastError

          public static String getLastError()

      Return last SSL error string
      Returns:
        the error string

    - #### hasOp

          public static boolean hasOp(int op)

      Return true if all the requested SSL_OP_* are supported by OpenSSL. Note that for versions of tcnative < 1.1.25, this method will return `true` if and only if `op`= `SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION` and tcnative supports that flag.
      Parameters:
        `op` - Bitwise-OR of all SSL_OP_* to test.
      Returns:
        true if all SSL_OP_* are supported by OpenSSL library.

    - #### getHandshakeCount

          public static int getHandshakeCount(long ssl)

      Return the handshake completed count.
      Parameters:
        `ssl` - SSL pointer
      Returns:
        the count

    - #### newSSL

          public static long newSSL(long ctx,
                                    boolean server)

      SSL_new
      Parameters:
        `ctx` - Server or Client context to use.
        `server` - if true configure SSL instance to use accept handshake routines if false configure SSL instance to use connect handshake routines
      Returns:
        pointer to SSL instance (SSL *)

    - #### setBIO

          public static void setBIO(long ssl,
                                    long rbio,
                                    long wbio)

      SSL_set_bio
      Parameters:
        `ssl` - SSL pointer (SSL *)
        `rbio` - read BIO pointer (BIO *)
        `wbio` - write BIO pointer (BIO *)

    - #### getError

          public static int getError(long ssl,
                                     int ret)

      SSL_get_error
      Parameters:
        `ssl` - SSL pointer (SSL *)
        `ret` - TLS/SSL I/O return value
      Returns:
        the error status

    - #### pendingWrittenBytesInBIO

          public static int pendingWrittenBytesInBIO(long bio)

      BIO_ctrl_pending.
      Parameters:
        `bio` - BIO pointer (BIO *)
      Returns:
        the pending bytes count

    - #### pendingReadableBytesInSSL

          public static int pendingReadableBytesInSSL(long ssl)

      SSL_pending.
      Parameters:
        `ssl` - SSL pointer (SSL *)
      Returns:
        the pending bytes count

    - #### writeToBIO

          public static int writeToBIO(long bio,
                                       long wbuf,
                                       int wlen)

      BIO_write.
      Parameters:
        `bio` - BIO pointer
        `wbuf` - Buffer pointer
        `wlen` - Write length
      Returns:
        the bytes count written

    - #### readFromBIO

          public static int readFromBIO(long bio,
                                        long rbuf,
                                        int rlen)

      BIO_read.
      Parameters:
        `bio` - BIO pointer
        `rbuf` - Buffer pointer
        `rlen` - Read length
      Returns:
        the bytes count read

    - #### writeToSSL

          public static int writeToSSL(long ssl,
                                       long wbuf,
                                       int wlen)

      SSL_write.
      Parameters:
        `ssl` - the SSL instance (SSL *)
        `wbuf` - Buffer pointer
        `wlen` - Write length
      Returns:
        the bytes count written

    - #### readFromSSL

          public static int readFromSSL(long ssl,
                                        long rbuf,
                                        int rlen)

      SSL_read
      Parameters:
        `ssl` - the SSL instance (SSL *)
        `rbuf` - Buffer pointer
        `rlen` - Read length
      Returns:
        the bytes count read

    - #### getShutdown

          public static int getShutdown(long ssl)

      SSL_get_shutdown
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        the operation status

    - #### setShutdown

          public static void setShutdown(long ssl,
                                         int mode)

      SSL_set_shutdown
      Parameters:
        `ssl` - the SSL instance (SSL *)
        `mode` - Shutdown mode

    - #### freeSSL

          public static void freeSSL(long ssl)

      SSL_free
      Parameters:
        `ssl` - the SSL instance (SSL *)

    - #### makeNetworkBIO

          public static long makeNetworkBIO(long ssl)

      Wire up internal and network BIOs for the given SSL instance. Warning: you must explicitly free this resource by calling freeBIO While the SSL's internal/application data BIO will be freed when freeSSL is called on the provided SSL instance, you must call freeBIO on the returned network BIO.
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        pointer to the Network BIO (BIO *)

    - #### freeBIO

          public static void freeBIO(long bio)

      BIO_free
      Parameters:
        `bio` - BIO pointer

    - #### shutdownSSL

          public static int shutdownSSL(long ssl)

      SSL_shutdown
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        the operation status

    - #### getLastErrorNumber

          public static int getLastErrorNumber()

      Get the error number representing the last error OpenSSL encountered on this thread.
      Returns:
        the last error number

    - #### getCipherForSSL

          public static String getCipherForSSL(long ssl)

      SSL_get_cipher.
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        the cipher name

    - #### getVersion

          public static String getVersion(long ssl)

      SSL_get_version
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        the SSL version in use

    - #### doHandshake

          public static int doHandshake(long ssl)

      SSL_do_handshake
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        the handshake status

    - #### renegotiate

          public static int renegotiate(long ssl)

      SSL_renegotiate
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        the operation status

    - #### renegotiatePending

          public static int renegotiatePending(long ssl)

      SSL_renegotiate_pending
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        the operation status

    - #### verifyClientPostHandshake

          public static int verifyClientPostHandshake(long ssl)

      SSL_verify_client_post_handshake
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        the operation status

    - #### getPostHandshakeAuthInProgress

          public static int getPostHandshakeAuthInProgress(long ssl)

      Is post handshake authentication in progress on this connection?
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        the operation status

    - #### isInInit

          public static int isInInit(long ssl)

      SSL_in_init.
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        the status

    - #### getNextProtoNegotiated

          public static String getNextProtoNegotiated(long ssl)

      SSL_get0_next_proto_negotiated
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        the NPN protocol negotiated

    - #### getAlpnSelected

          public static String getAlpnSelected(long ssl)

      SSL_get0_alpn_selected
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        the ALPN protocol negotiated

    - #### getPeerCertChain

          public static byte[][] getPeerCertChain(long ssl)

      Get the peer certificate chain or `null` if non was send.
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        the certificate chain bytes

    - #### getPeerCertificate

          public static byte[] getPeerCertificate(long ssl)

      Get the peer certificate or `null` if non was send.
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        the certificate bytes

    - #### getErrorString

          public static String getErrorString(long errorNumber)

      Get the error number representing for the given `errorNumber`.
      Parameters:
        `errorNumber` - The error code
      Returns:
        an error message

    - #### getTime

          public static long getTime(long ssl)

      SSL_get_time
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        returns the time at which the session ssl was established. The time is given in seconds since the Epoch

    - #### setVerify

          public static void setVerify(long ssl,
                                       int level,
                                       int depth)

      Set Type of Client Certificate verification and Maximum depth of CA Certificates in Client Certificate verification.
      This directive sets the Certificate verification level for the Client Authentication. Notice that this directive can be used both in per-server and per-directory context. In per-server context it applies to the client authentication process used in the standard SSL handshake when a connection is established. In per-directory context it forces an SSL renegotiation with the reconfigured client verification level after the HTTP request was read but before the HTTP response is sent.
      The following levels are available for level:

           SSL_CVERIFY_NONE           - No client Certificate is required at all
           SSL_CVERIFY_OPTIONAL       - The client may present a valid Certificate
           SSL_CVERIFY_REQUIRE        - The client has to present a valid Certificate
           SSL_CVERIFY_OPTIONAL_NO_CA - The client may present a valid Certificate
                                        but it need not to be (successfully) verifiable

      The depth actually is the maximum number of intermediate certificate issuers, i.e. the number of CA certificates which are max allowed to be followed while verifying the client certificate. A depth of 0 means that self-signed client certificates are accepted only, the default depth of 1 means the client certificate can be self-signed or has to be signed by a CA which is directly known to the server (i.e. the CA's certificate is under `setCACertificatePath`, etc.
      Parameters:
        `ssl` - the SSL instance (SSL *)
        `level` - Type of Client Certificate verification.
        `depth` - Maximum depth of CA Certificates in Client Certificate verification.

    - #### setOptions

          public static void setOptions(long ssl,
                                        int options)

      Set OpenSSL Option.
      Parameters:
        `ssl` - the SSL instance (SSL *)
        `options` - See SSL.SSL_OP_* for option flags.

    - #### getOptions

          public static int getOptions(long ssl)

      Get OpenSSL Option.
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        options See SSL.SSL_OP_* for option flags.

    - #### getCiphers

          public static String[] getCiphers(long ssl)

      Returns all cipher suites that are enabled for negotiation in an SSL handshake.
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        ciphers

    - #### setCipherSuites

          public static boolean setCipherSuites(long ssl,
                                                String ciphers)
                                         throws Exception

      Returns the cipher suites available for negotiation in SSL handshake.
      This complex directive uses a colon-separated cipher-spec string consisting of OpenSSL cipher specifications to configure the Cipher Suite the client is permitted to negotiate in the SSL handshake phase. Notice that this directive can be used both in per-server and per-directory context. In per-server context it applies to the standard SSL handshake when a connection is established. In per-directory context it forces an SSL renegotiation with the reconfigured Cipher Suite after the HTTP request was read but before the HTTP response is sent.
      Parameters:
        `ssl` - the SSL instance (SSL *)
        `ciphers` - an SSL cipher specification
      Returns:
        `true` if the operation was successful
      Throws:
        `Exception` - An error occurred

    - #### getSessionId

          public static byte[] getSessionId(long ssl)

      Returns the ID of the session as byte array representation.
      Parameters:
        `ssl` - the SSL instance (SSL *)
      Returns:
        the session as byte array representation obtained via SSL_SESSION_get_id.

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