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# keysdata ## Name keysdata -- Crypto key data object definition. ## Synopsis
    typedef             xmlSecKeyDataUsage;
    #define             xmlSecKeyDataUsageUnknown
    #define             xmlSecKeyDataUsageKeyInfoNodeRead
    #define             xmlSecKeyDataUsageKeyInfoNodeWrite
    #define             xmlSecKeyDataUsageKeyValueNodeRead
    #define             xmlSecKeyDataUsageKeyValueNodeWrite
    #define             xmlSecKeyDataUsageRetrievalMethodNodeXml
    #define             xmlSecKeyDataUsageRetrievalMethodNodeBin
    #define             xmlSecKeyDataUsageAny
    #define             xmlSecKeyDataUsageKeyInfoNode
    #define             xmlSecKeyDataUsageKeyValueNode
    #define             xmlSecKeyDataUsageRetrievalMethodNode
    typedef             xmlSecKeyDataType;
    #define             xmlSecKeyDataTypeUnknown
    #define             xmlSecKeyDataTypeNone
    #define             xmlSecKeyDataTypePublic
    #define             xmlSecKeyDataTypePrivate
    #define             xmlSecKeyDataTypeSymmetric
    #define             xmlSecKeyDataTypeSession
    #define             xmlSecKeyDataTypePermanent
    #define             xmlSecKeyDataTypeTrusted
    #define             xmlSecKeyDataTypeAny
    enum                xmlSecKeyDataFormat;
    xmlSecPtrListPtr    xmlSecKeyDataIdsGet                 (void);
    int                 xmlSecKeyDataIdsInit                (void);
    void                xmlSecKeyDataIdsShutdown            (void);
    int                 xmlSecKeyDataIdsRegisterDefault     (void);
    int                 xmlSecKeyDataIdsRegister            (xmlSecKeyDataId id);
    struct              xmlSecKeyData;
    xmlSecKeyDataPtr    xmlSecKeyDataCreate                 (xmlSecKeyDataId id);
    xmlSecKeyDataPtr    xmlSecKeyDataDuplicate              (xmlSecKeyDataPtr data);
    void                xmlSecKeyDataDestroy                (xmlSecKeyDataPtr data);
    int                 xmlSecKeyDataGenerate               (xmlSecKeyDataPtr data,
                                                             xmlSecSize sizeBits,
                                                             xmlSecKeyDataType type);
    xmlSecKeyDataType   xmlSecKeyDataGetType                (xmlSecKeyDataPtr data);
    xmlSecSize          xmlSecKeyDataGetSize                (xmlSecKeyDataPtr data);
    const xmlChar*      xmlSecKeyDataGetIdentifier          (xmlSecKeyDataPtr data);
    void                xmlSecKeyDataDebugDump              (xmlSecKeyDataPtr data,
                                                             FILE *output);
    void                xmlSecKeyDataDebugXmlDump           (xmlSecKeyDataPtr data,
                                                             FILE *output);
    int                 xmlSecKeyDataXmlRead                (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlNodePtr node,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
    int                 xmlSecKeyDataXmlWrite               (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlNodePtr node,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
    int                 xmlSecKeyDataBinRead                (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             const xmlSecByte *buf,
                                                             xmlSecSize bufSize,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
    int                 xmlSecKeyDataBinWrite               (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlSecByte **buf,
                                                             xmlSecSize *bufSize,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
    #define             xmlSecKeyDataGetName                (data)
    #define             xmlSecKeyDataIsValid                (data)
    #define             xmlSecKeyDataCheckId                (data, dataId)
    #define             xmlSecKeyDataCheckUsage             (data, usg)
    #define             xmlSecKeyDataCheckSize              (data, size)
    #define             xmlSecKeyDataIdUnknown
    int                 (*xmlSecKeyDataInitMethod)          (xmlSecKeyDataPtr data);
    int                 (*xmlSecKeyDataDuplicateMethod)     (xmlSecKeyDataPtr dst,
                                                             xmlSecKeyDataPtr src);
    void                (*xmlSecKeyDataFinalizeMethod)      (xmlSecKeyDataPtr data);
    int                 (*xmlSecKeyDataXmlReadMethod)       (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlNodePtr node,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
    int                 (*xmlSecKeyDataXmlWriteMethod)      (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlNodePtr node,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
    int                 (*xmlSecKeyDataBinReadMethod)       (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             const xmlSecByte *buf,
                                                             xmlSecSize bufSize,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
    int                 (*xmlSecKeyDataBinWriteMethod)      (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlSecByte **buf,
                                                             xmlSecSize *bufSize,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
    int                 (*xmlSecKeyDataGenerateMethod)      (xmlSecKeyDataPtr data,
                                                             xmlSecSize sizeBits,
                                                             xmlSecKeyDataType type);
    xmlSecKeyDataType   (*xmlSecKeyDataGetTypeMethod)       (xmlSecKeyDataPtr data);
    xmlSecSize          (*xmlSecKeyDataGetSizeMethod)       (xmlSecKeyDataPtr data);
    const xmlChar *     (*xmlSecKeyDataGetIdentifierMethod) (xmlSecKeyDataPtr data);
    void                (*xmlSecKeyDataDebugDumpMethod)     (xmlSecKeyDataPtr data,
                                                             FILE *output);
    struct              xmlSecKeyDataKlass;
    #define             xmlSecKeyDataKlassGetName           (klass)
    #define             xmlSecKeyDataListId
    xmlSecPtrListId     xmlSecKeyDataListGetKlass           (void);
    #define             xmlSecKeyDataIdListId
    xmlSecPtrListId     xmlSecKeyDataIdListGetKlass         (void);
    int                 xmlSecKeyDataIdListFind             (xmlSecPtrListPtr list,
                                                             xmlSecKeyDataId dataId);
    xmlSecKeyDataId     xmlSecKeyDataIdListFindByNode       (xmlSecPtrListPtr list,
                                                             const xmlChar *nodeName,
                                                             const xmlChar *nodeNs,
                                                             xmlSecKeyDataUsage usage);
    xmlSecKeyDataId     xmlSecKeyDataIdListFindByHref       (xmlSecPtrListPtr list,
                                                             const xmlChar *href,
                                                             xmlSecKeyDataUsage usage);
    xmlSecKeyDataId     xmlSecKeyDataIdListFindByName       (xmlSecPtrListPtr list,
                                                             const xmlChar *name,
                                                             xmlSecKeyDataUsage usage);
    void                xmlSecKeyDataIdListDebugDump        (xmlSecPtrListPtr list,
                                                             FILE *output);
    void                xmlSecKeyDataIdListDebugXmlDump     (xmlSecPtrListPtr list,
                                                             FILE *output);
    #define             xmlSecKeyDataBinarySize
    int                 xmlSecKeyDataBinaryValueInitialize  (xmlSecKeyDataPtr data);
    int                 xmlSecKeyDataBinaryValueDuplicate   (xmlSecKeyDataPtr dst,
                                                             xmlSecKeyDataPtr src);
    void                xmlSecKeyDataBinaryValueFinalize    (xmlSecKeyDataPtr data);
    int                 xmlSecKeyDataBinaryValueXmlRead     (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlNodePtr node,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
    int                 xmlSecKeyDataBinaryValueXmlWrite    (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlNodePtr node,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
    int                 xmlSecKeyDataBinaryValueBinRead     (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             const xmlSecByte *buf,
                                                             xmlSecSize bufSize,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
    int                 xmlSecKeyDataBinaryValueBinWrite    (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlSecByte **buf,
                                                             xmlSecSize *bufSize,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
    void                xmlSecKeyDataBinaryValueDebugDump   (xmlSecKeyDataPtr data,
                                                             FILE *output);
    void                xmlSecKeyDataBinaryValueDebugXmlDump
                                                            (xmlSecKeyDataPtr data,
                                                             FILE *output);
    xmlSecSize          xmlSecKeyDataBinaryValueGetSize     (xmlSecKeyDataPtr data);
    xmlSecBufferPtr     xmlSecKeyDataBinaryValueGetBuffer   (xmlSecKeyDataPtr data);
    int                 xmlSecKeyDataBinaryValueSetBuffer   (xmlSecKeyDataPtr data,
                                                             const xmlSecByte *buf,
                                                             xmlSecSize bufSize);
    struct              xmlSecKeyDataStore;
    xmlSecKeyDataStorePtr  xmlSecKeyDataStoreCreate         (xmlSecKeyDataStoreId id);
    void                xmlSecKeyDataStoreDestroy           (xmlSecKeyDataStorePtr store);
    #define             xmlSecKeyDataStoreGetName           (store)
    #define             xmlSecKeyDataStoreIsValid           (store)
    #define             xmlSecKeyDataStoreCheckId           (store, storeId)
    #define             xmlSecKeyDataStoreCheckSize         (store, size)
    #define             xmlSecKeyDataStoreIdUnknown
    int                 (*xmlSecKeyDataStoreInitializeMethod)
                                                            (xmlSecKeyDataStorePtr store);
    void                (*xmlSecKeyDataStoreFinalizeMethod) (xmlSecKeyDataStorePtr store);
    struct              xmlSecKeyDataStoreKlass;
    #define             xmlSecKeyDataStoreKlassGetName      (klass)
    #define             xmlSecKeyDataStorePtrListId
    xmlSecPtrListId     xmlSecKeyDataStorePtrListGetKlass   (void);
## Description Crypto key data object definition. ## Details ### xmlSecKeyDataUsage
    typedef unsigned int                                    xmlSecKeyDataUsage;
The bits mask that determines possible keys data usage. ### xmlSecKeyDataUsageUnknown
    #define xmlSecKeyDataUsageUnknown                       0x00000
The key data usage is unknown. ### xmlSecKeyDataUsageKeyInfoNodeRead
    #define xmlSecKeyDataUsageKeyInfoNodeRead               0x00001
The key data could be read from a <dsig:KeyInfo/> child. ### xmlSecKeyDataUsageKeyInfoNodeWrite
    #define xmlSecKeyDataUsageKeyInfoNodeWrite              0x00002
The key data could be written to a <dsig:KeyInfo /> child. ### xmlSecKeyDataUsageKeyValueNodeRead
    #define xmlSecKeyDataUsageKeyValueNodeRead              0x00004
The key data could be read from a <dsig:KeyValue /> child. ### xmlSecKeyDataUsageKeyValueNodeWrite
    #define xmlSecKeyDataUsageKeyValueNodeWrite             0x00008
The key data could be written to a <dsig:KeyValue /> child. ### xmlSecKeyDataUsageRetrievalMethodNodeXml
    #define xmlSecKeyDataUsageRetrievalMethodNodeXml        0x00010
The key data could be retrieved using <dsig:RetrievalMethod /> node in XML format. ### xmlSecKeyDataUsageRetrievalMethodNodeBin
    #define xmlSecKeyDataUsageRetrievalMethodNodeBin        0x00020
The key data could be retrieved using <dsig:RetrievalMethod /> node in binary format. ### xmlSecKeyDataUsageAny
    #define xmlSecKeyDataUsageAny                           0xFFFFF
Any key data usage. ### xmlSecKeyDataUsageKeyInfoNode
    #define             xmlSecKeyDataUsageKeyInfoNode
The key data could be read and written from/to a <dsig:KeyInfo /> child. ### xmlSecKeyDataUsageKeyValueNode
    #define             xmlSecKeyDataUsageKeyValueNode
The key data could be read and written from/to a <dsig:KeyValue /> child. ### xmlSecKeyDataUsageRetrievalMethodNode
    #define             xmlSecKeyDataUsageRetrievalMethodNode
The key data could be retrieved using <dsig:RetrievalMethod /> node in any format. ### xmlSecKeyDataType
    typedef unsigned int                            xmlSecKeyDataType;
The key data type (public/private, session/permanet, etc.). ### xmlSecKeyDataTypeUnknown
    #define xmlSecKeyDataTypeUnknown                        0x0000
The key data type is unknown (same as xmlSecKeyDataTypeNone). ### xmlSecKeyDataTypeNone
    #define xmlSecKeyDataTypeNone                           xmlSecKeyDataTypeUnknown
The key data type is unknown (same as xmlSecKeyDataTypeUnknown). ### xmlSecKeyDataTypePublic
    #define xmlSecKeyDataTypePublic                         0x0001
The key data contain a public key. ### xmlSecKeyDataTypePrivate
    #define xmlSecKeyDataTypePrivate                        0x0002
The key data contain a private key. ### xmlSecKeyDataTypeSymmetric
    #define xmlSecKeyDataTypeSymmetric                      0x0004
The key data contain a symmetric key. ### xmlSecKeyDataTypeSession
    #define xmlSecKeyDataTypeSession                        0x0008
The key data contain session key (one time key, not stored in keys manager). ### xmlSecKeyDataTypePermanent
    #define xmlSecKeyDataTypePermanent                      0x0010
The key data contain permanent key (stored in keys manager). ### xmlSecKeyDataTypeTrusted
    #define xmlSecKeyDataTypeTrusted                        0x0100
The key data is trusted. ### xmlSecKeyDataTypeAny
    #define xmlSecKeyDataTypeAny                            0xFFFF
Any key data. ### enum xmlSecKeyDataFormat
    typedef enum {
        xmlSecKeyDataFormatUnknown = 0,
        xmlSecKeyDataFormatBinary,
        xmlSecKeyDataFormatPem,
        xmlSecKeyDataFormatDer,
        xmlSecKeyDataFormatPkcs8Pem,
        xmlSecKeyDataFormatPkcs8Der,
        xmlSecKeyDataFormatPkcs12,
        xmlSecKeyDataFormatCertPem,
        xmlSecKeyDataFormatCertDer
    } xmlSecKeyDataFormat;
The key data format (binary, der, pem, etc.).
`xmlSecKeyDataFormatUnknown` | the key data format is unknown.
`xmlSecKeyDataFormatBinary` | the binary key data.
`xmlSecKeyDataFormatPem` | the PEM key data (cert or public/private key).
`xmlSecKeyDataFormatDer` | the DER key data (cert or public/private key).
`xmlSecKeyDataFormatPkcs8Pem` | the PKCS8 PEM private key.
`xmlSecKeyDataFormatPkcs8Der` | the PKCS8 DER private key.
`xmlSecKeyDataFormatPkcs12` | the PKCS12 format (bag of keys and certs)
`xmlSecKeyDataFormatCertPem` | the PEM cert.
`xmlSecKeyDataFormatCertDer` | the DER cert.
### xmlSecKeyDataIdsGet ()
    xmlSecPtrListPtr    xmlSecKeyDataIdsGet                 (void);
Gets global registered key data klasses list.
Returns : | the pointer to list of all registered key data klasses.
### xmlSecKeyDataIdsInit ()
    int                 xmlSecKeyDataIdsInit                (void);
Initializes the key data klasses. This function is called from the xmlSecInit function and the application should not call it directly.
Returns : | 0 on success or a negative value if an error occurs.
### xmlSecKeyDataIdsShutdown ()
    void                xmlSecKeyDataIdsShutdown            (void);
Shuts down the keys data klasses. This function is called from the xmlSecShutdown function and the application should not call it directly. ### xmlSecKeyDataIdsRegisterDefault ()
    int                 xmlSecKeyDataIdsRegisterDefault     (void);
Registers default (implemented by XML Security Library) key data klasses: <dsig:KeyName/> element processing klass, <dsig:KeyValue/> element processing klass, ...
Returns : | 0 on success or a negative value if an error occurs.
### xmlSecKeyDataIdsRegister ()
    int                 xmlSecKeyDataIdsRegister            (xmlSecKeyDataId id);
Registers `id` in the global list of key data klasses.
`id` : | the key data klass.
Returns : | 0 on success or a negative value if an error occurs.
### struct xmlSecKeyData
    struct xmlSecKeyData {
        xmlSecKeyDataId                     id;
        void*                               reserved0;
        void*                               reserved1;
    };
The key data: key value (crypto material), x509 data, pgp data, etc.
xmlSecKeyDataId `id`; | the data id (xmlSecKeyDataId).
void *`reserved0`; | reserved for the future.
void *`reserved1`; | reserved for the future.
### xmlSecKeyDataCreate ()
    xmlSecKeyDataPtr    xmlSecKeyDataCreate                 (xmlSecKeyDataId id);
Allocates and initializes new key data of the specified type `id`. Caller is responsible for destroying returned object with xmlSecKeyDataDestroy function.
`id` : | the data id.
Returns : | the pointer to newly allocated key data structure or NULL if an error occurs.
### xmlSecKeyDataDuplicate ()
    xmlSecKeyDataPtr    xmlSecKeyDataDuplicate              (xmlSecKeyDataPtr data);
Creates a duplicate of the given `data`. Caller is responsible for destroying returned object with xmlSecKeyDataDestroy function.
`data` : | the pointer to the key data.
Returns : | the pointer to newly allocated key data structure or NULL if an error occurs.
### xmlSecKeyDataDestroy ()
    void                xmlSecKeyDataDestroy                (xmlSecKeyDataPtr data);
Destroys the data and frees all allocated memory.
`data` : | the pointer to the key data.
### xmlSecKeyDataGenerate ()
    int                 xmlSecKeyDataGenerate               (xmlSecKeyDataPtr data,
                                                             xmlSecSize sizeBits,
                                                             xmlSecKeyDataType type);
Generates new key data of given size and type.
`data` : | the pointer to key data.
`sizeBits` : | the desired key data size (in bits).
`type` : | the desired key data type.
Returns : | 0 on success or a negative value otherwise.
### xmlSecKeyDataGetType ()
    xmlSecKeyDataType   xmlSecKeyDataGetType                (xmlSecKeyDataPtr data);
Gets key data type.
`data` : | the pointer to key data.
Returns : | key data type.
### xmlSecKeyDataGetSize ()
    xmlSecSize          xmlSecKeyDataGetSize                (xmlSecKeyDataPtr data);
Gets key data size.
`data` : | the pointer to key data.
Returns : | key data size (in bits).
### xmlSecKeyDataGetIdentifier ()
    const xmlChar*      xmlSecKeyDataGetIdentifier          (xmlSecKeyDataPtr data);
Gets key data identifier string.
`data` : | the pointer to key data.
Returns : | key data id string.
### xmlSecKeyDataDebugDump ()
    void                xmlSecKeyDataDebugDump              (xmlSecKeyDataPtr data,
                                                             FILE *output);
Prints key data debug info.
`data` : | the pointer to key data.
`output` : | the pointer to output FILE.
### xmlSecKeyDataDebugXmlDump ()
    void                xmlSecKeyDataDebugXmlDump           (xmlSecKeyDataPtr data,
                                                             FILE *output);
Prints key data debug info in XML format.
`data` : | the pointer to key data.
`output` : | the pointer to output FILE.
### xmlSecKeyDataXmlRead ()
    int                 xmlSecKeyDataXmlRead                (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlNodePtr node,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
Reads the key data of klass `id` from XML `node` and adds them to `key`.
`id` : | the data klass.
`key` : | the destination key.
`node` : | the pointer to an XML node.
`keyInfoCtx` : | the pointer to <dsig:KeyInfo/> element processing context.
Returns : | 0 on success or a negative value otherwise.
### xmlSecKeyDataXmlWrite ()
    int                 xmlSecKeyDataXmlWrite               (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlNodePtr node,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
Writes the key data of klass `id` from `key` to an XML `node`.
`id` : | the data klass.
`key` : | the source key.
`node` : | the pointer to an XML node.
`keyInfoCtx` : | the pointer to <dsig:KeyInfo/> element processing context.
Returns : | 0 on success or a negative value otherwise.
### xmlSecKeyDataBinRead ()
    int                 xmlSecKeyDataBinRead                (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             const xmlSecByte *buf,
                                                             xmlSecSize bufSize,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
Reads the key data of klass `id` from binary buffer `buf` to `key`.
`id` : | the data klass.
`key` : | the destination key.
`buf` : | the input binary buffer.
`bufSize` : | the input buffer size.
`keyInfoCtx` : | the <dsig:KeyInfo/> node processing context.
Returns : | 0 on success or a negative value if an error occurs.
### xmlSecKeyDataBinWrite ()
    int                 xmlSecKeyDataBinWrite               (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlSecByte **buf,
                                                             xmlSecSize *bufSize,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
Writes the key data of klass `id` from the `key` to a binary buffer `buf`.
`id` : | the data klass.
`key` : | the source key.
`buf` : | the output binary buffer.
`bufSize` : | the output buffer size.
`keyInfoCtx` : | the <dsig:KeyInfo/> node processing context.
Returns : | 0 on success or a negative value if an error occurs.
### xmlSecKeyDataGetName()
    #define             xmlSecKeyDataGetName(data)
Macro. Returns the key data name.
`data` : | the pointer to key data.
### xmlSecKeyDataIsValid()
    #define             xmlSecKeyDataIsValid(data)
Macro. Returns 1 if `data` is not NULL and `data`->id is not NULL or 0 otherwise.
`data` : | the pointer to data.
### xmlSecKeyDataCheckId()
    #define             xmlSecKeyDataCheckId(data, dataId)
Macro. Returns 1 if `data` is valid and `data`'s id is equal to `dataId`.
`data` : | the pointer to data.
`dataId` : | the data Id.
### xmlSecKeyDataCheckUsage()
    #define             xmlSecKeyDataCheckUsage(data, usg)
Macro. Returns 1 if `data` is valid and could be used for `usg`.
`data` : | the pointer to data.
`usg` : | the data usage.
### xmlSecKeyDataCheckSize()
    #define             xmlSecKeyDataCheckSize(data, size)
Macro. Returns 1 if `data` is valid and `data`'s object has at least `size` bytes.
`data` : | the pointer to data.
`size` : | the expected size.
### xmlSecKeyDataIdUnknown
    #define xmlSecKeyDataIdUnknown                  ((xmlSecKeyDataId)NULL)
The "unknown" id. ### xmlSecKeyDataInitMethod ()
    int                 (*xmlSecKeyDataInitMethod)          (xmlSecKeyDataPtr data);
Key data specific initialization method.
`data` : | the pointer to key data.
Returns : | 0 on success or a negative value if an error occurs.
### xmlSecKeyDataDuplicateMethod ()
    int                 (*xmlSecKeyDataDuplicateMethod)     (xmlSecKeyDataPtr dst,
                                                             xmlSecKeyDataPtr src);
Key data specific duplication (copy) method.
`dst` : | the pointer to destination key data.
`src` : | the poiniter to source key data.
Returns : | 0 on success or a negative value if an error occurs.
### xmlSecKeyDataFinalizeMethod ()
    void                (*xmlSecKeyDataFinalizeMethod)      (xmlSecKeyDataPtr data);
Key data specific finalization method. All the objects and resources allocated by the key data object must be freed inside this method.
`data` : | the data.
### xmlSecKeyDataXmlReadMethod ()
    int                 (*xmlSecKeyDataXmlReadMethod)       (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlNodePtr node,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
Key data specific method for reading XML node.
`id` : | the data id.
`key` : | the key.
`node` : | the pointer to data's value XML node.
`keyInfoCtx` : | the <dsig:KeyInfo/> node processing context.
Returns : | 0 on success or a negative value if an error occurs.
### xmlSecKeyDataXmlWriteMethod ()
    int                 (*xmlSecKeyDataXmlWriteMethod)      (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlNodePtr node,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
Key data specific method for writing XML node.
`id` : | the data id.
`key` : | the key.
`node` : | the pointer to data's value XML node.
`keyInfoCtx` : | the <dsig:KeyInfo> node processing context.
Returns : | 0 on success or a negative value if an error occurs.
### xmlSecKeyDataBinReadMethod ()
    int                 (*xmlSecKeyDataBinReadMethod)       (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             const xmlSecByte *buf,
                                                             xmlSecSize bufSize,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
Key data specific method for reading binary buffer.
`id` : | the data id.
`key` : | the key.
`buf` : | the input buffer.
`bufSize` : | the buffer size.
`keyInfoCtx` : | the <dsig:KeyInfo/> node processing context.
Returns : | 0 on success or a negative value if an error occurs.
### xmlSecKeyDataBinWriteMethod ()
    int                 (*xmlSecKeyDataBinWriteMethod)      (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlSecByte **buf,
                                                             xmlSecSize *bufSize,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
Key data specific method for reading binary buffer.
`id` : | the data id.
`key` : | the key.
`buf` : | the output buffer.
`bufSize` : | the buffer size.
`keyInfoCtx` : | the <dsig:KeyInfo/> node processing context.
Returns : | 0 on success or a negative value if an error occurs.
### xmlSecKeyDataGenerateMethod ()
    int                 (*xmlSecKeyDataGenerateMethod)      (xmlSecKeyDataPtr data,
                                                             xmlSecSize sizeBits,
                                                             xmlSecKeyDataType type);
Key data specific method for generating new key data.
`data` : | the pointer to key data.
`sizeBits` : | the key data specific size.
`type` : | the required key type (session/permanent, etc.)
Returns : | 0 on success or a negative value if an error occurs.
### xmlSecKeyDataGetTypeMethod ()
    xmlSecKeyDataType   (*xmlSecKeyDataGetTypeMethod)       (xmlSecKeyDataPtr data);
Key data specific method to get the key type.
`data` : | the data.
Returns : | the key type.
### xmlSecKeyDataGetSizeMethod ()
    xmlSecSize          (*xmlSecKeyDataGetSizeMethod)       (xmlSecKeyDataPtr data);
Key data specific method to get the key size.
`data` : | the pointer to key data.
Returns : | the key size in bits.
### xmlSecKeyDataGetIdentifierMethod ()
    const xmlChar *     (*xmlSecKeyDataGetIdentifierMethod) (xmlSecKeyDataPtr data);
Key data specific method to get the key data identifier string (for example, X509 data identifier is the subject of the verified cert).
`data` : | the pointer to key data.
Returns : | the identifier string or NULL if an error occurs.
### xmlSecKeyDataDebugDumpMethod ()
    void                (*xmlSecKeyDataDebugDumpMethod)     (xmlSecKeyDataPtr data,
                                                             FILE *output);
Key data specific method for printing debug info.
`data` : | the data.
`output` : | the FILE to print debug info (should be open for writing).
### struct xmlSecKeyDataKlass
    struct xmlSecKeyDataKlass {
        xmlSecSize                          klassSize;
        xmlSecSize                          objSize;

        /* data */
        const xmlChar*                      name;
        xmlSecKeyDataUsage                  usage;
        const xmlChar*                      href;
        const xmlChar*                      dataNodeName;
        const xmlChar*                      dataNodeNs;

        /* constructors/destructor */
        xmlSecKeyDataInitMethod             initialize;
        xmlSecKeyDataDuplicateMethod        duplicate;
        xmlSecKeyDataFinalizeMethod         finalize;
        xmlSecKeyDataGenerateMethod         generate;

        /* get info */
        xmlSecKeyDataGetTypeMethod          getType;
        xmlSecKeyDataGetSizeMethod          getSize;
        xmlSecKeyDataGetIdentifierMethod    getIdentifier;

        /* read/write */
        xmlSecKeyDataXmlReadMethod          xmlRead;
        xmlSecKeyDataXmlWriteMethod         xmlWrite;
        xmlSecKeyDataBinReadMethod          binRead;
        xmlSecKeyDataBinWriteMethod         binWrite;

        /* debug */
        xmlSecKeyDataDebugDumpMethod        debugDump;
        xmlSecKeyDataDebugDumpMethod        debugXmlDump;

        /* for the future */
        void*                               reserved0;
        void*                               reserved1;
    };
The data id (klass).
xmlSecSize `klassSize`; | the klass size.
xmlSecSize `objSize`; | the object size.
const xmlChar *`name`; | the object name.
xmlSecKeyDataUsage `usage`; | the allowed data usage.
const xmlChar *`href`; | the identification string (href).
const xmlChar *`dataNodeName`; | the data's XML node name.
const xmlChar *`dataNodeNs`; | the data's XML node namespace.
xmlSecKeyDataInitMethod `initialize`; | the initialization method.
xmlSecKeyDataDuplicateMethod `duplicate`; | the duplicate (copy) method.
xmlSecKeyDataFinalizeMethod `finalize`; | the finalization (destroy) method.
xmlSecKeyDataGenerateMethod `generate`; | the new data generation method.
xmlSecKeyDataGetTypeMethod `getType`; | the method to access data's type information.
xmlSecKeyDataGetSizeMethod `getSize`; | the method to access data's size.
xmlSecKeyDataGetIdentifierMethod `getIdentifier`; | the method to access data's string identifier.
xmlSecKeyDataXmlReadMethod `xmlRead`; | the method for reading data from XML node.
xmlSecKeyDataXmlWriteMethod `xmlWrite`; | the method for writing data to XML node.
xmlSecKeyDataBinReadMethod `binRead`; | the method for reading data from a binary buffer.
xmlSecKeyDataBinWriteMethod `binWrite`; | the method for writing data to binary buffer.
xmlSecKeyDataDebugDumpMethod `debugDump`; | the method for printing debug data information.
xmlSecKeyDataDebugDumpMethod `debugXmlDump`; | the method for printing debug data information in XML format.
void *`reserved0`; | reserved for the future.
void *`reserved1`; | reserved for the future.
### xmlSecKeyDataKlassGetName()
    #define             xmlSecKeyDataKlassGetName(klass)
Macro. Returns data klass name.
`klass` : | the data klass.
### xmlSecKeyDataListId
    #define xmlSecKeyDataListId     xmlSecKeyDataListGetKlass()
The key data klasses list klass id. ### xmlSecKeyDataListGetKlass ()
    xmlSecPtrListId     xmlSecKeyDataListGetKlass           (void);
The key data list klass.
Returns : | pointer to the key data list klass.
### xmlSecKeyDataIdListId
    #define xmlSecKeyDataIdListId   xmlSecKeyDataIdListGetKlass()
The key data list klass id. ### xmlSecKeyDataIdListGetKlass ()
    xmlSecPtrListId     xmlSecKeyDataIdListGetKlass         (void);
The key data id list klass.
Returns : | pointer to the key data id list klass.
### xmlSecKeyDataIdListFind ()
    int                 xmlSecKeyDataIdListFind             (xmlSecPtrListPtr list,
                                                             xmlSecKeyDataId dataId);
Lookups `dataId` in `list`.
`list` : | the pointer to key data ids list.
`dataId` : | the key data klass.
Returns : | 1 if `dataId` is found in the `list`, 0 if not and a negative value if an error occurs.
### xmlSecKeyDataIdListFindByNode ()
    xmlSecKeyDataId     xmlSecKeyDataIdListFindByNode       (xmlSecPtrListPtr list,
                                                             const xmlChar *nodeName,
                                                             const xmlChar *nodeNs,
                                                             xmlSecKeyDataUsage usage);
Lookups data klass in the list with given `nodeName`, `nodeNs` and `usage` in the `list`.
`list` : | the pointer to key data ids list.
`nodeName` : | the desired key data klass XML node name.
`nodeNs` : | the desired key data klass XML node namespace.
`usage` : | the desired key data usage.
Returns : | key data klass is found and NULL otherwise.
### xmlSecKeyDataIdListFindByHref ()
    xmlSecKeyDataId     xmlSecKeyDataIdListFindByHref       (xmlSecPtrListPtr list,
                                                             const xmlChar *href,
                                                             xmlSecKeyDataUsage usage);
Lookups data klass in the list with given `href` and `usage` in `list`.
`list` : | the pointer to key data ids list.
`href` : | the desired key data klass href.
`usage` : | the desired key data usage.
Returns : | key data klass is found and NULL otherwise.
### xmlSecKeyDataIdListFindByName ()
    xmlSecKeyDataId     xmlSecKeyDataIdListFindByName       (xmlSecPtrListPtr list,
                                                             const xmlChar *name,
                                                             xmlSecKeyDataUsage usage);
Lookups data klass in the list with given `name` and `usage` in `list`.
`list` : | the pointer to key data ids list.
`name` : | the desired key data klass name.
`usage` : | the desired key data usage.
Returns : | key data klass is found and NULL otherwise.
### xmlSecKeyDataIdListDebugDump ()
    void                xmlSecKeyDataIdListDebugDump        (xmlSecPtrListPtr list,
                                                             FILE *output);
Prints binary key data debug information to `output`.
`list` : | the pointer to key data ids list.
`output` : | the pointer to output FILE.
### xmlSecKeyDataIdListDebugXmlDump ()
    void                xmlSecKeyDataIdListDebugXmlDump     (xmlSecPtrListPtr list,
                                                             FILE *output);
Prints binary key data debug information to `output` in XML format.
`list` : | the pointer to key data ids list.
`output` : | the pointer to output FILE.
### xmlSecKeyDataBinarySize
    #define             xmlSecKeyDataBinarySize
The binary key data object size. ### xmlSecKeyDataBinaryValueInitialize ()
    int                 xmlSecKeyDataBinaryValueInitialize  (xmlSecKeyDataPtr data);
Initializes key data.
`data` : | the pointer to binary key data.
Returns : | 0 on success or a negative value otherwise.
### xmlSecKeyDataBinaryValueDuplicate ()
    int                 xmlSecKeyDataBinaryValueDuplicate   (xmlSecKeyDataPtr dst,
                                                             xmlSecKeyDataPtr src);
Copies binary key data from `src` to `dst`.
`dst` : | the pointer to destination binary key data.
`src` : | the pointer to source binary key data.
Returns : | 0 on success or a negative value otherwise.
### xmlSecKeyDataBinaryValueFinalize ()
    void                xmlSecKeyDataBinaryValueFinalize    (xmlSecKeyDataPtr data);
Cleans up binary key data.
`data` : | the pointer to binary key data.
### xmlSecKeyDataBinaryValueXmlRead ()
    int                 xmlSecKeyDataBinaryValueXmlRead     (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlNodePtr node,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
Reads binary key data from `node` to the key by base64 decoding the `node` content.
`id` : | the data klass.
`key` : | the pointer to destination key.
`node` : | the pointer to an XML node.
`keyInfoCtx` : | the pointer to <dsig:KeyInfo/> element processing context.
Returns : | 0 on success or a negative value otherwise.
### xmlSecKeyDataBinaryValueXmlWrite ()
    int                 xmlSecKeyDataBinaryValueXmlWrite    (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlNodePtr node,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
Base64 encodes binary key data of klass `id` from the `key` and sets to the `node` content.
`id` : | the data klass.
`key` : | the pointer to source key.
`node` : | the pointer to an XML node.
`keyInfoCtx` : | the pointer to <dsig:KeyInfo/> element processing context.
Returns : | 0 on success or a negative value otherwise.
### xmlSecKeyDataBinaryValueBinRead ()
    int                 xmlSecKeyDataBinaryValueBinRead     (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             const xmlSecByte *buf,
                                                             xmlSecSize bufSize,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
Reads binary key data of the klass `id` from `buf` to the `key`.
`id` : | the data klass.
`key` : | the pointer to destination key.
`buf` : | the source binary buffer.
`bufSize` : | the source binary buffer size.
`keyInfoCtx` : | the pointer to <dsig:KeyInfo/> element processing context.
Returns : | 0 on success or a negative value otherwise.
### xmlSecKeyDataBinaryValueBinWrite ()
    int                 xmlSecKeyDataBinaryValueBinWrite    (xmlSecKeyDataId id,
                                                             xmlSecKeyPtr key,
                                                             xmlSecByte **buf,
                                                             xmlSecSize *bufSize,
                                                             xmlSecKeyInfoCtxPtr keyInfoCtx);
Writes binary key data of klass `id` from the `key` to `buf`.
`id` : | the data klass.
`key` : | the pointer to source key.
`buf` : | the destination binary buffer.
`bufSize` : | the destination binary buffer size.
`keyInfoCtx` : | the pointer to <dsig:KeyInfo/> element processing context.
Returns : | 0 on success or a negative value otherwise.
### xmlSecKeyDataBinaryValueDebugDump ()
    void                xmlSecKeyDataBinaryValueDebugDump   (xmlSecKeyDataPtr data,
                                                             FILE *output);
Prints binary key data debug information to `output`.
`data` : | the pointer to binary key data.
`output` : | the pointer to output FILE.
### xmlSecKeyDataBinaryValueDebugXmlDump ()
    void                xmlSecKeyDataBinaryValueDebugXmlDump
                                                            (xmlSecKeyDataPtr data,
                                                             FILE *output);
Prints binary key data debug information to `output` in XML format.
`data` : | the pointer to binary key data.
`output` : | the pointer to output FILE.
### xmlSecKeyDataBinaryValueGetSize ()
    xmlSecSize          xmlSecKeyDataBinaryValueGetSize     (xmlSecKeyDataPtr data);
Gets the binary key data size.
`data` : | the pointer to binary key data.
Returns : | binary key data size in bits.
### xmlSecKeyDataBinaryValueGetBuffer ()
    xmlSecBufferPtr     xmlSecKeyDataBinaryValueGetBuffer   (xmlSecKeyDataPtr data);
Gets the binary key data buffer.
`data` : | the pointer to binary key data.
Returns : | pointer to binary key data buffer.
### xmlSecKeyDataBinaryValueSetBuffer ()
    int                 xmlSecKeyDataBinaryValueSetBuffer   (xmlSecKeyDataPtr data,
                                                             const xmlSecByte *buf,
                                                             xmlSecSize bufSize);
Sets the value of `data` to `buf`.
`data` : | the pointer to binary key data.
`buf` : | the pointer to binary buffer.
`bufSize` : | the binary buffer size.
Returns : | 0 on success or a negative value otherwise.
### struct xmlSecKeyDataStore
    struct xmlSecKeyDataStore {
        xmlSecKeyDataStoreId                id;

        /* for the future */
        void*                               reserved0;
        void*                               reserved1;
    };
The key data store. Key data store holds common key data specific information required for key data processing. For example, X509 data store may hold information about trusted (root) certificates.
xmlSecKeyDataStoreId `id`; | the store id (xmlSecKeyDataStoreId).
void *`reserved0`; | reserved for the future.
void *`reserved1`; | reserved for the future.
### xmlSecKeyDataStoreCreate ()
    xmlSecKeyDataStorePtr  xmlSecKeyDataStoreCreate         (xmlSecKeyDataStoreId id);
Creates new key data store of the specified klass `id`. Caller is responsible for freeing returned object with xmlSecKeyDataStoreDestroy function.
`id` : | the store id.
Returns : | the pointer to newly allocated key data store structure or NULL if an error occurs.
### xmlSecKeyDataStoreDestroy ()
    void                xmlSecKeyDataStoreDestroy           (xmlSecKeyDataStorePtr store);
Destroys the key data store created with xmlSecKeyDataStoreCreate function.
`store` : | the pointer to the key data store..
### xmlSecKeyDataStoreGetName()
    #define             xmlSecKeyDataStoreGetName(store)
Macro. Returns key data store name.
`store` : | the pointer to store.
### xmlSecKeyDataStoreIsValid()
    #define             xmlSecKeyDataStoreIsValid(store)
Macro. Returns 1 if `store` is not NULL and `store`->id is not NULL or 0 otherwise.
`store` : | the pointer to store.
### xmlSecKeyDataStoreCheckId()
    #define             xmlSecKeyDataStoreCheckId(store, storeId)
Macro. Returns 1 if `store` is valid and `store`'s id is equal to `storeId`.
`store` : | the pointer to store.
`storeId` : | the store Id.
### xmlSecKeyDataStoreCheckSize()
    #define             xmlSecKeyDataStoreCheckSize(store, size)
Macro. Returns 1 if `data` is valid and `stores`'s object has at least `size` bytes.
`store` : | the pointer to store.
`size` : | the expected size.
### xmlSecKeyDataStoreIdUnknown
    #define xmlSecKeyDataStoreIdUnknown                     NULL
The "unknown" id. ### xmlSecKeyDataStoreInitializeMethod ()
    int                 (*xmlSecKeyDataStoreInitializeMethod)
                                                            (xmlSecKeyDataStorePtr store);
Key data store specific initialization method.
`store` : | the data store.
Returns : | 0 on success or a negative value if an error occurs.
### xmlSecKeyDataStoreFinalizeMethod ()
    void                (*xmlSecKeyDataStoreFinalizeMethod) (xmlSecKeyDataStorePtr store);
Key data store specific finalization (destroy) method.
`store` : | the data store.
### struct xmlSecKeyDataStoreKlass
    struct xmlSecKeyDataStoreKlass {
        xmlSecSize                          klassSize;
        xmlSecSize                          objSize;

        /* data */
        const xmlChar*                      name;

        /* constructors/destructor */
        xmlSecKeyDataStoreInitializeMethod  initialize;
        xmlSecKeyDataStoreFinalizeMethod    finalize;

        /* for the future */
        void*                               reserved0;
        void*                               reserved1;
    };
The data store id (klass).
xmlSecSize `klassSize`; | the data store klass size.
xmlSecSize `objSize`; | the data store obj size.
const xmlChar *`name`; | the store's name.
xmlSecKeyDataStoreInitializeMethod `initialize`; | the store's initialization method.
xmlSecKeyDataStoreFinalizeMethod `finalize`; | the store's finalization (destroy) method.
void *`reserved0`; | reserved for the future.
void *`reserved1`; | reserved for the future.
### xmlSecKeyDataStoreKlassGetName()
    #define             xmlSecKeyDataStoreKlassGetName(klass)
Macro. Returns store klass name.
`klass` : | the pointer to store klass.
### xmlSecKeyDataStorePtrListId
    #define xmlSecKeyDataStorePtrListId     xmlSecKeyDataStorePtrListGetKlass()
The data store list id (klass). ### xmlSecKeyDataStorePtrListGetKlass ()
    xmlSecPtrListId     xmlSecKeyDataStorePtrListGetKlass   (void);
Key data stores list.
Returns : | key data stores list klass.