OpenSsl (Netty 4.1.109.Final API文档 - 即时通讯网(52im.net))

java.lang.Object
- io.netty.handler.ssl.OpenSsl

```
public final class OpenSsl
extends java.lang.Object
```
Tells if netty-tcnative and its OpenSSL support are available.

方法概要

All Methods Static Methods Concrete Methods Deprecated Methods
限定符和类型	方法和说明
`static java.util.Set<java.lang.String>`	`availableCipherSuites()` 已过时。 use `availableOpenSslCipherSuites()`
`static java.util.Set<java.lang.String>`	`availableJavaCipherSuites()` Returns all the available cipher suites (Java-style).
`static java.util.Set<java.lang.String>`	`availableOpenSslCipherSuites()` Returns all the available OpenSSL cipher suites.
`static void`	`ensureAvailability()` Ensure that `netty-tcnative` and its OpenSSL support are available.
`static boolean`	`isAlpnSupported()` 已过时。 use `SslProvider.isAlpnSupported(SslProvider)` with `SslProvider.OPENSSL`.
`static boolean`	`isAvailable()` Returns `true` if and only if `netty-tcnative` and its OpenSSL support are available.
`static boolean`	`isCipherSuiteAvailable(java.lang.String cipherSuite)` Returns `true` if and only if the specified cipher suite is available in OpenSSL.
`static boolean`	`isOcspSupported()` Returns `true` if the used version of OpenSSL supports OCSP stapling.
`static boolean`	`supportsHostnameValidation()` 已过时。 Will be removed because hostname validation is always done by a `TrustManager` implementation.
`static boolean`	`supportsKeyManagerFactory()` Returns `true` if `KeyManagerFactory` is supported when using OpenSSL.
`static java.lang.Throwable`	`unavailabilityCause()` Returns the cause of unavailability of `netty-tcnative` and its OpenSSL support.
`static int`	`version()` Returns the version of the used available OpenSSL library or `-1` if `isAvailable()` returns `false`.
`static java.lang.String`	`versionString()` Returns the version string of the used available OpenSSL library or `null` if `isAvailable()` returns `false`.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 方法详细资料
  - isAvailable
```
public static boolean isAvailable()
```
    Returns true if and only if netty-tcnative and its OpenSSL support are available.
  - isAlpnSupported
```
@Deprecated
public static boolean isAlpnSupported()
```
    已过时。 use SslProvider.isAlpnSupported(SslProvider) with SslProvider.OPENSSL.
    
    Returns true if the used version of openssl supports ALPN.
  - isOcspSupported
```
public static boolean isOcspSupported()
```
    Returns true if the used version of OpenSSL supports OCSP stapling.
  - version
```
public static int version()
```
    Returns the version of the used available OpenSSL library or -1 if isAvailable() returns false.
  - versionString
```
public static java.lang.String versionString()
```
    Returns the version string of the used available OpenSSL library or null if isAvailable() returns false.
  - ensureAvailability
```
public static void ensureAvailability()
```
    Ensure that netty-tcnative and its OpenSSL support are available.
    
    抛出:
    
    java.lang.UnsatisfiedLinkError - if unavailable
  - unavailabilityCause
```
public static java.lang.Throwable unavailabilityCause()
```
    Returns the cause of unavailability of netty-tcnative and its OpenSSL support.
    
    返回:
    
    the cause if unavailable. null if available.
  - availableCipherSuites
```
@Deprecated
public static java.util.Set<java.lang.String> availableCipherSuites()
```
    已过时。 use availableOpenSslCipherSuites()
  - availableOpenSslCipherSuites
```
public static java.util.Set<java.lang.String> availableOpenSslCipherSuites()
```
    Returns all the available OpenSSL cipher suites. Please note that the returned array may include the cipher suites that are insecure or non-functional.
  - availableJavaCipherSuites
```
public static java.util.Set<java.lang.String> availableJavaCipherSuites()
```
    Returns all the available cipher suites (Java-style). Please note that the returned array may include the cipher suites that are insecure or non-functional.
  - isCipherSuiteAvailable
```
public static boolean isCipherSuiteAvailable(java.lang.String cipherSuite)
```
    Returns true if and only if the specified cipher suite is available in OpenSSL. Both Java-style cipher suite and OpenSSL-style cipher suite are accepted.
  - supportsKeyManagerFactory
```
public static boolean supportsKeyManagerFactory()
```
    Returns true if KeyManagerFactory is supported when using OpenSSL.
  - supportsHostnameValidation
```
@Deprecated
public static boolean supportsHostnameValidation()
```
    已过时。 Will be removed because hostname validation is always done by a TrustManager implementation.
    
    Always returns true if isAvailable() returns true.

类 OpenSsl

方法概要

从类继承的方法 java.lang.Object

方法详细资料

isAvailable

isAlpnSupported

isOcspSupported

version

versionString

ensureAvailability

unavailabilityCause

availableCipherSuites

availableOpenSslCipherSuites

availableJavaCipherSuites

isCipherSuiteAvailable

supportsKeyManagerFactory

supportsHostnameValidation