# QSslCertificate Class Reference
## [[QtNetwork](index.htm) module]
该QSslCertificate类提供了一个X509证书了方便的API 。[More...](#details)
### Types
* `enum SubjectInfo { Organization, CommonName, LocalityName, OrganizationalUnitName, CountryName, StateOrProvinceName }`
### Methods
* `__init__ (self, QIODevice device, QSsl.EncodingFormat format = QSsl.Pem)`
* `__init__ (self, QByteArray data = QByteArray(), QSsl.EncodingFormat format = QSsl.Pem)`
* `__init__ (self, QSslCertificate other)`
* `dict-of-QSsl.AlternateNameEntryType-list-of-QString alternateSubjectNames (self)`
* `clear (self)`
* `QByteArray digest (self, QCryptographicHash.Algorithm algorithm = QCryptographicHash.Md5)`
* `QDateTime effectiveDate (self)`
* `QDateTime expiryDate (self)`
* `int handle (self)`
* `bool isNull (self)`
* `QString issuerInfo (self, SubjectInfo info)`
* `QString issuerInfo (self, QByteArray tag)`
* `bool isValid (self)`
* `QSslKey publicKey (self)`
* `QByteArray serialNumber (self)`
* `QString subjectInfo (self, SubjectInfo info)`
* `QString subjectInfo (self, QByteArray tag)`
* `QByteArray toDer (self)`
* `QByteArray toPem (self)`
* `QByteArray version (self)`
### Static Methods
* `list-of-QSslCertificate fromData (QByteArray data, QSsl.EncodingFormat format = QSsl.Pem)`
* `list-of-QSslCertificate fromDevice (QIODevice device, QSsl.EncodingFormat format = QSsl.Pem)`
* `list-of-QSslCertificate fromPath (QString path, QSsl.EncodingFormat format = QSsl.Pem, QRegExp.PatternSyntax syntax = QRegExp.FixedString)`
### Special Methods
* `bool __eq__ (self, QSslCertificate other)`
* `bool __ne__ (self, QSslCertificate other)`
* * *
## Detailed Description
该QSslCertificate类提供了一个X509证书了方便的API 。
QSslCertificate存储X509证书，并且通常用于验证有关本地主机，远程连接等，或可信任的第三方认证机构的标识和存储信息。
有许多方法来构造一个QSslCertificate 。最常见的方法是调用[QSslSocket.peerCertificate](qsslsocket.html#peerCertificate)（ ） ，它返回一个QSslCertificate对象，或[QSslSocket.peerCertificateChain](qsslsocket.html#peerCertificateChain)（ ） ，它返回它们的列表。您也可以加载一个DER证书（二进制）或PEM （ Base64编码）编码的捆绑，通常存储为一个或多个本地文件，或在Qt的资源。
您可以致电[isNull](qsslcertificate.html#isNull)（）来检查，如果你的证书为null 。默认情况下， QSslCertificate构造一个空证书。要检查证书是否有效，呼叫[isValid](qsslcertificate.html#isValid)（ ） 。空证书是无效的，但一个无效的证书不一定空。如果你想重置所有内容的凭证，请致电[clear](qsslcertificate.html#clear)（ ） 。
加载证书后，您可以找到有关证书，它的主题，它的发行者信息，通过调用许多存取功能之一，包括[version](qsslcertificate.html#version)（ ）[serialNumber](qsslcertificate.html#serialNumber)（ ）[issuerInfo](qsslcertificate.html#issuerInfo)（）和[subjectInfo](qsslcertificate.html#subjectInfo)（ ） 。您可以致电[effectiveDate](qsslcertificate.html#effectiveDate)（）和[expiryDate](qsslcertificate.html#expiryDate)（）来检查时，启动证书是有效，当它过期。该[publicKey](qsslcertificate.html#publicKey)（ ）函数返回证书主题的公钥作为[QSslKey](qsslkey.html)。您可以致电[issuerInfo](qsslcertificate.html#issuerInfo)（）或[subjectInfo](qsslcertificate.html#subjectInfo)（）来获取有关证书颁发者和它的主题的详细信息。
在内部， QSslCertificate被存储为一个X509结构。您可以通过调用访问此手柄[handle](qsslcertificate.html#handle)（） ，但结果可能不是可移植的。
* * *
## Type Documentation
```
QSslCertificate.SubjectInfo
```
介绍了可以传递给钥匙[QSslCertificate.issuerInfo](qsslcertificate.html#issuerInfo)（）或[QSslCertificate.subjectInfo](qsslcertificate.html#subjectInfo)（）来获取有关证书颁发者或主题的信息。
| Constant | Value | Description |
| --- | --- | --- |
| `QSslCertificate.Organization` | `0` | “O”的组织的名称。 |
| `QSslCertificate.CommonName` | `1` | “CN”的通用名称;最常这是用来存储主机名。 |
| `QSslCertificate.LocalityName` | `2` | “L”的地方。 |
| `QSslCertificate.OrganizationalUnitName` | `3` | 「其他指定用途“的组织单位名称。 |
| `QSslCertificate.CountryName` | `4` | “C”的国家。 |
| `QSslCertificate.StateOrProvinceName` | `5` | “ST”的州或省。 |
* * *
## Method Documentation
```
QSslCertificate.__init__ (self, QIODevice device, QSsl.EncodingFormat format = QSsl.Pem)
```
构造一个[QSslCertificate](qsslcertificate.html)阅读_format_从编码数据_device_并使用找到的第一个证书。您可以稍后致电[isNull](qsslcertificate.html#isNull)（） ，以查看是否_device_包含一个证书，如果加载成功后，该证书。
```
QSslCertificate.__init__ (self, QByteArray data = QByteArray(), QSsl.EncodingFormat format = QSsl.Pem)
```
构造一个[QSslCertificate](qsslcertificate.html)通过解析_format_编码_data_并使用找到的第一个可用的证书。您可以稍后致电[isNull](qsslcertificate.html#isNull)（） ，以查看是否_data_包含一个证书，如果加载成功后，该证书。
```
QSslCertificate.__init__ (self, QSslCertificate other)
```
构造完全相同的副本_other_。
```
dict-of-QSsl.AlternateNameEntryType-list-of-QString QSslCertificate.alternateSubjectNames (self)
```
返回此证书备用主题名的列表。备选主题名称通常包含主机名，可以使用通配符，即有效期为这个证书。
这些名称对所连接的对端的主机名进行测试，如果任一标的信息[CommonName](qsslcertificate.html#SubjectInfo-enum)没有定义一个有效的主机名，或拍摄主体信息名称不匹配对端的主机名。
**See also** [subjectInfo](qsslcertificate.html#subjectInfo)（ ） 。
```
QSslCertificate.clear (self)
```
清除该证书的内容，使之成为一个空证书。
**See also** [isNull](qsslcertificate.html#isNull)（ ） 。
```
QByteArray QSslCertificate.digest (self, QCryptographicHash.Algorithm algorithm = QCryptographicHash.Md5)
```
[
返回此证书的加密摘要。默认情况下，一个MD5摘要将会产生，但您也可以指定自定义_algorithm_。
](qbytearray.html)
```
QDateTime QSslCertificate.effectiveDate (self)
```
[](qdatetime.html)
[返回的日期，时间，该证书生效，或空](qdatetime.html)[QDateTime](qdatetime.html)如果这是一个无效的证书。
**See also** [expiryDate](qsslcertificate.html#expiryDate)（ ） 。
```
QDateTime QSslCertificate.expiryDate (self)
```
[](qdatetime.html)
[返回日期时间的证书过期，或空](qdatetime.html)[QDateTime](qdatetime.html)如果这是一个无效的证书。
**See also** [effectiveDate](qsslcertificate.html#effectiveDate)（ ） 。
```
list-of-QSslCertificate QSslCertificate.fromData (QByteArray data, QSsl.EncodingFormat format = QSsl.Pem)
```
搜索和分析所有证书_data_被编码在指定_format_并返回他们的证书的列表。
**See also** [fromDevice](qsslcertificate.html#fromDevice)（ ） 。
```
list-of-QSslCertificate QSslCertificate.fromDevice (QIODevice device, QSsl.EncodingFormat format = QSsl.Pem)
```
搜索和分析所有证书_device_被编码在指定_format_并返回他们的证书的列表。
**See also** [fromData](qsslcertificate.html#fromData)（ ） 。
```
list-of-QSslCertificate QSslCertificate.fromPath (QString path, QSsl.EncodingFormat format = QSsl.Pem, QRegExp.PatternSyntax syntax = QRegExp.FixedString)
```
搜索中的所有文件_path_对于证书编码指定_format_并返回它们在列表中。_must_是一个文件或一个图案匹配一个或多个文件，所指定的_syntax_。
例如：
```
foreach (const [QSslCertificate](qsslcertificate.html) &cert, [QSslCertificate](qsslcertificate.html).fromPath("C:/ssl/certificate.*.pem", [QSsl](qssl.html).Pem,
[QRegExp](qregexp.html).Wildcard)) {
qDebug() << cert.issuerInfo([QSslCertificate](qsslcertificate.html).Organization);
}
```
**See also** [fromData](qsslcertificate.html#fromData)（ ） 。
```
int QSslCertificate.handle (self)
```
返回一个指向本地证书手柄，如果有一个或一个空指针，否则。
你可以使用这个句柄，与原生API一起，访问有关证书的扩展信息。
**Warning:**使用此功能有被非便携式的概率很高，它的返回值可能会有所不同从平台到平台或次要版本变更次要版本。
```
bool QSslCertificate.isNull (self)
```
返回True如果这是一个空证书（即一个没有内容的证书），否则返回False 。
默认情况下，[QSslCertificate](qsslcertificate.html)构造一个空证书。
**See also** [isValid](qsslcertificate.html#isValid)（）和[clear](qsslcertificate.html#clear)（ ） 。
```
QString QSslCertificate.issuerInfo (self, SubjectInfo info)
```
返回发行人信息的_subject_从证书，或空字符串，如果没有信息_subject_在证书中。
**See also** [subjectInfo](qsslcertificate.html#subjectInfo)（ ） 。
```
QString QSslCertificate.issuerInfo (self, QByteArray tag)
```
返回发行人信息_tag_从证书，或空字符串，如果没有信息_tag_在证书中。
**See also** [subjectInfo](qsslcertificate.html#subjectInfo)（ ） 。
```
bool QSslCertificate.isValid (self)
```
返回True如果该证书是有效的，否则返回False 。
注：目前，该功能会检查当前的数据时间是在此期间，该证书被认为有效的日期时间范围内，并检查该证书是不是在欺诈证书的黑名单。
**See also** [isNull](qsslcertificate.html#isNull)（ ） 。
```
QSslKey QSslCertificate.publicKey (self)
```
[
返回证书主题的公钥。
](qsslkey.html)
```
QByteArray QSslCertificate.serialNumber (self)
```
[
以十进制格式返回该证书的序列号字符串。若序列号不能转换为十进制格式（例如，如果它大于4294967295 ，这意味着它不适合4个字节） ，则返回其十六进制的版本。
```
QString QSslCertificate.subjectInfo (self, SubjectInfo info)
```
返回的信息为_subject_，或空字符串，如果没有信息_subject_在证书中。
](qbytearray.html)
[**See also**](qbytearray.html) [issuerInfo](qsslcertificate.html#issuerInfo)（ ） 。
```
QString QSslCertificate.subjectInfo (self, QByteArray tag)
```
返回主题信息_tag_，或空字符串，如果没有信息_tag_在证书中。
**See also** [issuerInfo](qsslcertificate.html#issuerInfo)（ ） 。
```
QByteArray QSslCertificate.toDer (self)
```
[
返回此证书转换为DER （二进制）编码表示。
](qbytearray.html)
```
QByteArray QSslCertificate.toPem (self)
```
[
返回此证书转换为PEM （ Base64编码）编码表示。
](qbytearray.html)
```
QByteArray QSslCertificate.version (self)
```
[
返回证书的版本字符串。
```
bool QSslCertificate.__eq__ (self, QSslCertificate other)
```
```
bool QSslCertificate.__ne__ (self, QSslCertificate other)
```
](qbytearray.html)
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- QScriptClassPropertyIterator Class Reference
- QScriptContext Class Reference
- QScriptContextInfo Class Reference
- QScriptEngine Class Reference
- QScriptEngineAgent Class Reference
- QScriptEngineDebugger Class Reference
- QScriptString Class Reference
- QScriptSyntaxCheckResult Class Reference
- QScriptValue Class Reference
- QScriptValueIterator Class Reference
- QScrollArea Class Reference
- QScrollBar Class Reference
- QSemaphore Class Reference
- QSequentialAnimationGroup Class Reference
- QSessionManager Class Reference
- QSettings Class Reference
- QSharedMemory Class Reference
- QShortcut Class Reference
- QShortcutEvent Class Reference
- QShowEvent Class Reference
- QSignalMapper Class Reference
- QSignalTransition Class Reference
- QSimpleXmlNodeModel Class Reference
- QSize Class Reference
- QSizeF Class Reference
- QSizeGrip Class Reference
- QSizePolicy Class Reference
- QSlider Class Reference
- QSocketNotifier Class Reference
- QSortFilterProxyModel Class Reference
- QSound Class Reference
- QSourceLocation Class Reference
- QSpacerItem Class Reference
- QSpinBox Class Reference
- QSplashScreen Class Reference
- QSplitter Class Reference
- QSplitterHandle Class Reference
- QSql Class Reference
- QSqlDatabase Class Reference
- QSqlDriver Class Reference
- QSqlDriverCreatorBase Class Reference
- QSqlError Class Reference
- QSqlField Class Reference
- QSqlIndex Class Reference
- QSqlQuery Class Reference
- QSqlQueryModel Class Reference
- QSqlRecord Class Reference
- QSqlRelation Class Reference
- QSqlRelationalDelegate Class Reference
- QSqlRelationalTableModel Class Reference
- QSqlResult Class Reference
- QSqlTableModel Class Reference
- Qt4.7文档翻译：Qt样式单参考,Qt Style Sheets Reference
- QSsl Class Reference
- QSslCertificate Class Reference
- QSslCipher Class Reference
- QSslConfiguration Class Reference
- QSslError Class Reference
- QSslKey Class Reference
- QSslSocket Class Reference
- QStackedLayout Class Reference
- QStackedWidget Class Reference
- QStandardItem Class Reference
- QStandardItemModel Class Reference
- QState Class Reference
- QStateMachine Class Reference
- QStaticText Class Reference
- QStatusBar Class Reference
- QStatusTipEvent Class Reference
- QString Class Reference
- QStringList Class Reference
- QStringListModel Class Reference
- QStringMatcher Class Reference
- QStringRef Class Reference
- QStyle Class Reference
- QStyledItemDelegate Class Reference
- QStyleFactory Class Reference
- QStyleHintReturn Class Reference
- QStyleHintReturnMask Class Reference
- QStyleHintReturnVariant Class Reference
- QStyleOption Class Reference
- QStyleOptionButton Class Reference
- QStyleOptionComboBox Class Reference
- QStyleOptionComplex Class Reference
- QStyleOptionDockWidget Class Reference
- QStyleOptionDockWidgetV2 Class Reference
- QStyleOptionFocusRect Class Reference
- QStyleOptionFrame Class Reference
- QStyleOptionFrameV2 Class Reference
- QStyleOptionFrameV3 Class Reference
- QStyleOptionGraphicsItem Class Reference
- QStyleOptionGroupBox Class Reference
- QStyleOptionHeader Class Reference
- QStyleOptionMenuItem Class Reference
- QStyleOptionProgressBar Class Reference
- QStyleOptionProgressBarV2 Class Reference
- QStyleOptionRubberBand Class Reference
- QStyleOptionSizeGrip Class Reference
- QStyleOptionSlider Class Reference
- QStyleOptionSpinBox Class Reference
- QStyleOptionTab Class Reference
- QStyleOptionTabBarBase Class Reference
- QStyleOptionTabBarBaseV2 Class Reference
- QStyleOptionTabV2 Class Reference
- QStyleOptionTabV3 Class Reference
- QStyleOptionTabWidgetFrame Class Reference
- QStyleOptionTabWidgetFrameV2 Class Reference
- QStyleOptionTitleBar Class Reference
- QStyleOptionToolBar Class Reference
- QStyleOptionToolBox Class Reference
- QStyleOptionToolBoxV2 Class Reference
- QStyleOptionToolButton Class Reference
- QStyleOptionViewItem Class Reference
- QStyleOptionViewItemV2 Class Reference
- QStyleOptionViewItemV3 Class Reference
- QStyleOptionViewItemV4 Class Reference
- QStylePainter Class Reference
- QSvgGenerator Class Reference
- QSvgRenderer Class Reference
- QSvgWidget Class Reference
- QSwipeGesture Class Reference
- QSyntaxHighlighter Class Reference
- QSysInfo Class Reference
- QSystemLocale Class Reference
- QSystemSemaphore Class Reference
- QSystemTrayIcon Class Reference
- Qt Class Reference
- QTabBar Class Reference
- QTabletEvent Class Reference
- QTableView Class Reference
- QTableWidget Class Reference
- QTableWidgetItem Class Reference
- QTableWidgetSelectionRange Class Reference
- QTabWidget Class Reference
- QTapAndHoldGesture Class Reference
- QTapGesture Class Reference
- QTcpServer Class Reference
- QTcpSocket Class Reference
- QTemporaryFile Class Reference
- QTest Class Reference
- QTextBlock Class Reference
- QTextBlockFormat Class Reference
- QTextBlockGroup Class Reference
- QTextBlockUserData Class Reference
- QTextBoundaryFinder Class Reference
- QTextBrowser Class Reference
- QTextCharFormat Class Reference
- QTextCodec Class Reference
- QTextCursor Class Reference
- QTextDecoder Class Reference
- QTextDocument Class Reference
- QTextDocumentFragment Class Reference
- QTextDocumentWriter Class Reference
- QTextEdit Class Reference
- QTextEncoder Class Reference
- QTextFormat Class Reference
- QTextFragment Class Reference
- QTextFrame Class Reference
- QTextFrameFormat Class Reference
- QTextImageFormat Class Reference
- QTextInlineObject Class Reference
- QTextItem Class Reference
- QTextLayout Class Reference
- QTextLength Class Reference
- QTextLine Class Reference
- QTextList Class Reference
- QTextListFormat Class Reference
- QTextObject Class Reference
- QTextObjectInterface Class Reference
- QTextOption Class Reference
- QTextStream Class Reference
- QTextTable Class Reference
- QTextTableCell Class Reference
- QTextTableCellFormat Class Reference
- QTextTableFormat Class Reference
- QThread Class Reference
- QThreadPool Class Reference
- QTime Class Reference
- QTimeEdit Class Reference
- QTimeLine Class Reference
- QTimer Class Reference
- QTimerEvent Class Reference
- QToolBar Class Reference
- QToolBox Class Reference
- QToolButton Class Reference
- QToolTip Class Reference
- QTouchEvent Class Reference
- Reference
- QTransform Class Reference
- QTranslator Class Reference
- QTreeView Class Reference
- QTreeWidget Class Reference
- QTreeWidgetItem Class Reference
- QTreeWidgetItemIterator Class Reference
- QUdpSocket Class Reference
- QUndoCommand Class Reference
- QUndoGroup Class Reference
- QUndoStack Class Reference
- QUndoView Class Reference
- QUrl Class Reference
- QUrlInfo Class Reference
- QUuid Class Reference
- QValidator Class Reference
- QVariant Class Reference
- QVariantAnimation Class Reference
- QVBoxLayout Class Reference
- QVector2D Class Reference
- QVector3D Class Reference
- QVector4D Class Reference
- QVideoFrame Class Reference
- QVideoSurfaceFormat Class Reference
- QWaitCondition Class Reference
- QWebDatabase Class Reference
- QWebElement Class Reference
- QWebElementCollection Class Reference
- QWebFrame Class Reference
- QWebHistory Class Reference
- QWebHistoryInterface Class Reference
- QWebHistoryItem Class Reference
- QWebHitTestResult Class Reference
- QWebInspector Class Reference
- QWebPage Class Reference
- QWebPluginFactory Class Reference
- QWebSecurityOrigin Class Reference
- QWebSettings Class Reference
- QWebView Class Reference
- QWhatsThis Class Reference
- QWhatsThisClickedEvent Class Reference
- QWheelEvent Class Reference
- QWidget Class Reference
- QWidgetAction Class Reference
- QWidgetItem Class Reference
- QWindowStateChangeEvent Class Reference
- QWizard Class Reference
- QWizardPage Class Reference
- QWorkspace Class Reference
- QWriteLocker Class Reference
- QX11EmbedContainer Class Reference
- QX11EmbedWidget Class Reference
- QX11Info Class Reference
- QXmlAttributes Class Reference
- QXmlContentHandler Class Reference
- QXmlDeclHandler Class Reference
- QXmlDefaultHandler Class Reference
- QXmlDTDHandler Class Reference
- QXmlEntityResolver Class Reference
- QXmlErrorHandler Class Reference
- QXmlFormatter Class Reference
- QXmlInputSource Class Reference
- QXmlItem Class Reference
- QXmlLexicalHandler Class Reference
- QXmlLocator Class Reference
- QXmlName Class Reference
- QXmlNamePool Class Reference
- QXmlNamespaceSupport Class Reference
- QXmlNodeModelIndex Class Reference
- QXmlParseException Class Reference
- QXmlQuery Class Reference
- QXmlReader Class Reference
- QXmlResultItems Class Reference
- QXmlSchema Class Reference
- QXmlSchemaValidator Class Reference
- QXmlSerializer Class Reference
- QXmlSimpleReader Class Reference
- QXmlStreamAttribute Class Reference
- QXmlStreamAttributes Class Reference
- QXmlStreamEntityDeclaration Class Reference
- QXmlStreamEntityResolver Class Reference
- QXmlStreamNamespaceDeclaration Class Reference
- QXmlStreamNotationDeclaration Class Reference
- QXmlStreamReader Class Reference
- QXmlStreamWriter Class Reference