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# keyinfo ## Name keyinfo -- <dsig:KeyInfo/> node parser. ## Functions
int | xmlSecKeyInfoNodeRead ()
int | xmlSecKeyInfoNodeWrite ()
xmlSecKeyInfoCtxPtr | xmlSecKeyInfoCtxCreate ()
void | xmlSecKeyInfoCtxDestroy ()
int | xmlSecKeyInfoCtxInitialize ()
void | xmlSecKeyInfoCtxFinalize ()
void | xmlSecKeyInfoCtxReset ()
int | xmlSecKeyInfoCtxCopyUserPref ()
int | xmlSecKeyInfoCtxCreateEncCtx ()
void | xmlSecKeyInfoCtxDebugDump ()
void | xmlSecKeyInfoCtxDebugXmlDump ()
xmlSecKeyDataId | xmlSecKeyDataNameGetKlass ()
xmlSecKeyDataId | xmlSecKeyDataValueGetKlass ()
xmlSecKeyDataId | xmlSecKeyDataRetrievalMethodGetKlass ()
xmlSecKeyDataId | xmlSecKeyDataEncryptedKeyGetKlass ()
## Types and Values
enum | xmlSecKeyInfoMode
#define | XMLSEC_KEYINFO_FLAGS_DONT_STOP_ON_KEY_FOUND
#define | XMLSEC_KEYINFO_FLAGS_STOP_ON_UNKNOWN_CHILD
#define | XMLSEC_KEYINFO_FLAGS_KEYNAME_STOP_ON_UNKNOWN
#define | XMLSEC_KEYINFO_FLAGS_KEYVALUE_STOP_ON_UNKNOWN_CHILD
#define | XMLSEC_KEYINFO_FLAGS_RETRMETHOD_STOP_ON_UNKNOWN_HREF
#define | XMLSEC_KEYINFO_FLAGS_RETRMETHOD_STOP_ON_MISMATCH_HREF
#define | XMLSEC_KEYINFO_FLAGS_X509DATA_STOP_ON_UNKNOWN_CHILD
#define | XMLSEC_KEYINFO_FLAGS_X509DATA_DONT_VERIFY_CERTS
#define | XMLSEC_KEYINFO_FLAGS_X509DATA_STOP_ON_UNKNOWN_CERT
#define | XMLSEC_KEYINFO_FLAGS_X509DATA_STOP_ON_INVALID_CERT
#define | XMLSEC_KEYINFO_FLAGS_ENCKEY_DONT_STOP_ON_FAILED_DECRYPTION
#define | XMLSEC_KEYINFO_FLAGS_STOP_ON_EMPTY_NODE
#define | XMLSEC_KEYINFO_FLAGS_X509DATA_SKIP_STRICT_CHECKS
struct | xmlSecKeyInfoCtx
#define | xmlSecKeyDataNameId
#define | xmlSecKeyDataValueId
#define | xmlSecKeyDataRetrievalMethodId
#define | xmlSecKeyDataEncryptedKeyId
## Description <dsig:KeyInfo/> node parser. ## Functions ### xmlSecKeyInfoNodeRead ()
    int
    xmlSecKeyInfoNodeRead (xmlNodePtr keyInfoNode,
                           xmlSecKeyPtr key,
                           xmlSecKeyInfoCtxPtr keyInfoCtx);
Parses the <dsig:KeyInfo/> element `keyInfoNode` , extracts the key data and stores into `key` . #### Parameters
keyInfoNode | the pointer to <dsig:KeyInfo/> node. |
key | the pointer to result key object. |
keyInfoCtx | the pointer to <dsig:KeyInfo/> element processing context. |
#### Returns 0 on success or -1 if an error occurs. ### xmlSecKeyInfoNodeWrite ()
    int
    xmlSecKeyInfoNodeWrite (xmlNodePtr keyInfoNode,
                            xmlSecKeyPtr key,
                            xmlSecKeyInfoCtxPtr keyInfoCtx);
Writes the `key` into the <dsig:KeyInfo/> element template `keyInfoNode` . #### Parameters
keyInfoNode | the pointer to <dsig:KeyInfo/> node. |
key | the pointer to key object. |
keyInfoCtx | the pointer to <dsig:KeyInfo/> element processing context. |
#### Returns 0 on success or -1 if an error occurs. ### xmlSecKeyInfoCtxCreate ()
    xmlSecKeyInfoCtxPtr
    xmlSecKeyInfoCtxCreate (xmlSecKeysMngrPtr keysMngr);
Allocates and initializes <dsig:KeyInfo/> element processing context. Caller is responsible for freeing it by calling xmlSecKeyInfoCtxDestroy function. #### Parameters
keysMngr | the pointer to keys manager (may be NULL). |
#### Returns pointer to newly allocated object or NULL if an error occurs. ### xmlSecKeyInfoCtxDestroy ()
    void
    xmlSecKeyInfoCtxDestroy (xmlSecKeyInfoCtxPtr keyInfoCtx);
Destroys `keyInfoCtx` object created with xmlSecKeyInfoCtxCreate function. #### Parameters
keyInfoCtx | the pointer to <dsig:KeyInfo/> element processing context. |
### xmlSecKeyInfoCtxInitialize ()
    int
    xmlSecKeyInfoCtxInitialize (xmlSecKeyInfoCtxPtr keyInfoCtx,
                                xmlSecKeysMngrPtr keysMngr);
Initializes <dsig:KeyInfo/> element processing context. Caller is responsible for cleaning it up by xmlSecKeyInfoCtxFinalize function. #### Parameters
keyInfoCtx | the pointer to <dsig:KeyInfo/> element processing context. |
keysMngr | the pointer to keys manager (may be NULL). |
#### Returns 0 on success and a negative value if an error occurs. ### xmlSecKeyInfoCtxFinalize ()
    void
    xmlSecKeyInfoCtxFinalize (xmlSecKeyInfoCtxPtr keyInfoCtx);
Cleans up the `keyInfoCtx` initialized with xmlSecKeyInfoCtxInitialize function. #### Parameters
keyInfoCtx | the pointer to <dsig:KeyInfo/> element processing context. |
### xmlSecKeyInfoCtxReset ()
    void
    xmlSecKeyInfoCtxReset (xmlSecKeyInfoCtxPtr keyInfoCtx);
Resets the `keyInfoCtx` state. User settings are not changed. #### Parameters
keyInfoCtx | the pointer to <dsig:KeyInfo/> element processing context. |
### xmlSecKeyInfoCtxCopyUserPref ()
    int
    xmlSecKeyInfoCtxCopyUserPref (xmlSecKeyInfoCtxPtr dst,
                                  xmlSecKeyInfoCtxPtr src);
Copies user preferences from `src` context to `dst` context. #### Parameters
dst | the pointer to destination context object. |
src | the pointer to source context object. |
#### Returns 0 on success and a negative value if an error occurs. ### xmlSecKeyInfoCtxCreateEncCtx ()
    int
    xmlSecKeyInfoCtxCreateEncCtx (xmlSecKeyInfoCtxPtr keyInfoCtx);
Creates encryption context form processing <enc:EncryptedKey/> child of <dsig:KeyInfo/> element. #### Parameters
keyInfoCtx | the pointer to <dsig:KeyInfo/> element processing context. |
#### Returns 0 on success and a negative value if an error occurs. ### xmlSecKeyInfoCtxDebugDump ()
    void
    xmlSecKeyInfoCtxDebugDump (xmlSecKeyInfoCtxPtr keyInfoCtx,
                               FILE *output);
Prints user settings and current context state to `output` . #### Parameters
keyInfoCtx | the pointer to <dsig:KeyInfo/> element processing context. |
output | the output file pointer. |
### xmlSecKeyInfoCtxDebugXmlDump ()
    void
    xmlSecKeyInfoCtxDebugXmlDump (xmlSecKeyInfoCtxPtr keyInfoCtx,
                                  FILE *output);
Prints user settings and current context state in XML format to `output` . #### Parameters
keyInfoCtx | the pointer to <dsig:KeyInfo/> element processing context. |
output | the output file pointer. |
### xmlSecKeyDataNameGetKlass ()
    xmlSecKeyDataId
    xmlSecKeyDataNameGetKlass (void);
The <dsig:KeyName/> element key data klass (http://www.w3.org/TR/xmldsig-core/sec-KeyName): The KeyName element contains a string value (in which white space is significant) which may be used by the signer to communicate a key identifier to the recipient. Typically, KeyName contains an identifier related to the key pair used to sign the message, but it may contain other protocol-related information that indirectly identifies a key pair. (Common uses of KeyName include simple string names for keys, a key index, a distinguished name (DN), an email address, etc.) #### Returns the <dsig:KeyName/> element processing key data klass. ### xmlSecKeyDataValueGetKlass ()
    xmlSecKeyDataId
    xmlSecKeyDataValueGetKlass (void);
The <dsig:KeyValue/> element key data klass (http://www.w3.org/TR/xmldsig-core/sec-KeyValue): The KeyValue element contains a single public key that may be useful in validating the signature. #### Returns the <dsig:KeyValue/> element processing key data klass. ### xmlSecKeyDataRetrievalMethodGetKlass ()
    xmlSecKeyDataId
    xmlSecKeyDataRetrievalMethodGetKlass (void);
The <dsig:RetrievalMethod/> element key data klass (http://www.w3.org/TR/xmldsig-core/sec-RetrievalMethod): A RetrievalMethod element within KeyInfo is used to convey a reference to KeyInfo information that is stored at another location. For example, several signatures in a document might use a key verified by an X.509v3 certificate chain appearing once in the document or remotely outside the document; each signature's KeyInfo can reference this chain using a single RetrievalMethod element instead of including the entire chain with a sequence of X509Certificate elements. RetrievalMethod uses the same syntax and dereferencing behavior as Reference's URI and The Reference Processing Model. #### Returns the <dsig:RetrievalMethod/> element processing key data klass. ### xmlSecKeyDataEncryptedKeyGetKlass ()
    xmlSecKeyDataId
    xmlSecKeyDataEncryptedKeyGetKlass (void);
The <enc:EncryptedKey/> element key data klass (http://www.w3.org/TR/xmlenc-core/sec-EncryptedKey): The EncryptedKey element is used to transport encryption keys from the originator to a known recipient(s). It may be used as a stand-alone XML document, be placed within an application document, or appear inside an EncryptedData element as a child of a ds:KeyInfo element. The key value is always encrypted to the recipient(s). When EncryptedKey is decrypted the resulting octets are made available to the EncryptionMethod algorithm without any additional processing. #### Returns the <enc:EncryptedKey/> element processing key data klass. ## Types and Values ### enum xmlSecKeyInfoMode The `xmlSecKeyInfoCtx` operation mode (read or write). #### Members
xmlSecKeyInfoModeRead | read <dsig:KeyInfo /> element. |
xmlSecKeyInfoModeWrite | write <dsig:KeyInfo /> element. |
### XMLSEC_KEYINFO_FLAGS_DONT_STOP_ON_KEY_FOUND
    #define XMLSEC_KEYINFO_FLAGS_DONT_STOP_ON_KEY_FOUND             0x00000001
If flag is set then we will continue reading <dsig:KeyInfo /> element even when key is already found. ### XMLSEC_KEYINFO_FLAGS_STOP_ON_UNKNOWN_CHILD
    #define XMLSEC_KEYINFO_FLAGS_STOP_ON_UNKNOWN_CHILD              0x00000002
If flag is set then we abort if an unknown <dsig:KeyInfo /> child is found. ### XMLSEC_KEYINFO_FLAGS_KEYNAME_STOP_ON_UNKNOWN
    #define XMLSEC_KEYINFO_FLAGS_KEYNAME_STOP_ON_UNKNOWN            0x00000004
If flags is set then we abort if an unknown key name (content of <dsig:KeyName /> element) is found. ### XMLSEC_KEYINFO_FLAGS_KEYVALUE_STOP_ON_UNKNOWN_CHILD
    #define XMLSEC_KEYINFO_FLAGS_KEYVALUE_STOP_ON_UNKNOWN_CHILD     0x00000008
If flags is set then we abort if an unknown <dsig:KeyValue /> child is found. ### XMLSEC_KEYINFO_FLAGS_RETRMETHOD_STOP_ON_UNKNOWN_HREF
    #define XMLSEC_KEYINFO_FLAGS_RETRMETHOD_STOP_ON_UNKNOWN_HREF    0x00000010
If flag is set then we abort if an unknown href attribute of <dsig:RetrievalMethod /> element is found. ### XMLSEC_KEYINFO_FLAGS_RETRMETHOD_STOP_ON_MISMATCH_HREF
    #define XMLSEC_KEYINFO_FLAGS_RETRMETHOD_STOP_ON_MISMATCH_HREF   0x00000020
If flag is set then we abort if an href attribute <dsig:RetrievalMethod /> element does not match the real key data type. ### XMLSEC_KEYINFO_FLAGS_X509DATA_STOP_ON_UNKNOWN_CHILD
    #define XMLSEC_KEYINFO_FLAGS_X509DATA_STOP_ON_UNKNOWN_CHILD     0x00000100
If flags is set then we abort if an unknown <dsig:X509Data /> child is found. ### XMLSEC_KEYINFO_FLAGS_X509DATA_DONT_VERIFY_CERTS
    #define XMLSEC_KEYINFO_FLAGS_X509DATA_DONT_VERIFY_CERTS         0x00000200
If flag is set then we'll load certificates from <dsig:X509Data /> element without verification. ### XMLSEC_KEYINFO_FLAGS_X509DATA_STOP_ON_UNKNOWN_CERT
    #define XMLSEC_KEYINFO_FLAGS_X509DATA_STOP_ON_UNKNOWN_CERT      0x00000400
If flag is set then we'll stop when we could not resolve reference to certificate from <dsig:X509IssuerSerial />, <dsig:X509SKI /> or <dsig:X509SubjectName /> elements. ### XMLSEC_KEYINFO_FLAGS_X509DATA_STOP_ON_INVALID_CERT
    #define XMLSEC_KEYINFO_FLAGS_X509DATA_STOP_ON_INVALID_CERT      0x00000800
If the flag is set then we'll stop when <dsig:X509Data /> element processing does not return a verified certificate. ### XMLSEC_KEYINFO_FLAGS_ENCKEY_DONT_STOP_ON_FAILED_DECRYPTION
    #define XMLSEC_KEYINFO_FLAGS_ENCKEY_DONT_STOP_ON_FAILED_DECRYPTION 0x00001000
If the flag is set then we'll stop when <enc:EncryptedKey /> element processing fails. ### XMLSEC_KEYINFO_FLAGS_STOP_ON_EMPTY_NODE
    #define XMLSEC_KEYINFO_FLAGS_STOP_ON_EMPTY_NODE                 0x00002000
If the flag is set then we'll stop when we found an empty node. Otherwise we just ignore it. ### XMLSEC_KEYINFO_FLAGS_X509DATA_SKIP_STRICT_CHECKS
    #define XMLSEC_KEYINFO_FLAGS_X509DATA_SKIP_STRICT_CHECKS        0x00004000
If the flag is set then we'll skip strict checking of certs and CRLs ### struct xmlSecKeyInfoCtx
    struct xmlSecKeyInfoCtx {
        void*                               userData;
        unsigned int                        flags;
        unsigned int                        flags2;
        xmlSecKeysMngrPtr                   keysMngr;
        xmlSecKeyInfoMode                   mode;
        xmlSecPtrList                       enabledKeyData;
        int                                 base64LineSize;

        /* RetrievalMethod */
        xmlSecTransformCtx                  retrievalMethodCtx;
        int                                 maxRetrievalMethodLevel;

        /* EncryptedKey */
        xmlSecEncCtxPtr                     encCtx;
        int                                 maxEncryptedKeyLevel;

        /* x509 certificates */
        time_t                              certsVerificationTime;
        int                                 certsVerificationDepth;

        /* PGP */
        void*                               pgpReserved;    /* TODO */

        /* internal data */
        int                                 curRetrievalMethodLevel;
        int                                 curEncryptedKeyLevel;
        xmlSecKeyReq                        keyReq;

        /* for the future */
        void*                               reserved0;
        void*                               reserved1;
    };
The <dsig:KeyInfo /> reading or writing context. #### Members
void *`userData`; | the pointer to user data (xmlsec and xmlsec-crypto never touch this). |
unsigned int `flags`; | the bit mask for flags that control processin. |
unsigned int `flags2`; | reserved for future. |
xmlSecKeysMngrPtr `keysMngr`; | the pointer to current keys manager. |
xmlSecKeyInfoMode `mode`; | do we read or write <dsig:KeyInfo /> element. |
xmlSecPtrList `enabledKeyData`; | the list of enabled `xmlSecKeyDataId` (if list is empty then all data ids are enabled). |
int `base64LineSize`; | the max columns size for base64 encoding. |
xmlSecTransformCtx `retrievalMethodCtx`; | the transforms context for <dsig:RetrievalMethod /> element processing. |
int `maxRetrievalMethodLevel`; | the max recursion level when processing <dsig:RetrievalMethod /> element; default level is 1 (see also `curRetrievalMethodLevel` ). |
xmlSecEncCtxPtr `encCtx`; | the encryption context for <dsig:EncryptedKey /> element processing. |
int `maxEncryptedKeyLevel`; | the max recursion level when processing <enc:EncryptedKey /> element; default level is 1 (see `curEncryptedKeyLevel` ). |
time_t `certsVerificationTime`; | the time to use for X509 certificates verification ("not valid before" and "not valid after" checks); if `certsVerificationTime` is equal to 0 (default) then we verify certificates against the system's clock "now". |
int `certsVerificationDepth`; | the max certifications chain length (default is 9). |
void *`pgpReserved`; | reserved for PGP. |
int `curRetrievalMethodLevel`; | the current <dsig:RetrievalMethod /> element processing level (see `maxRetrievalMethodLevel` ). |
int `curEncryptedKeyLevel`; | the current <enc:EncryptedKey /> element processing level (see `maxEncryptedKeyLevel` ). |
xmlSecKeyReq `keyReq`; | the current key requirements. |
void *`reserved0`; | reserved for the future. |
void *`reserved1`; | reserved for the future. |
### xmlSecKeyDataNameId
    #define xmlSecKeyDataNameId             xmlSecKeyDataNameGetKlass()
The <dsig:KeyName> processing class. ### xmlSecKeyDataValueId
    #define xmlSecKeyDataValueId            xmlSecKeyDataValueGetKlass()
The <dsig:KeyValue> processing class. ### xmlSecKeyDataRetrievalMethodId
    #define xmlSecKeyDataRetrievalMethodId  xmlSecKeyDataRetrievalMethodGetKlass()
The <dsig:RetrievalMethod> processing class. ### xmlSecKeyDataEncryptedKeyId
    #define xmlSecKeyDataEncryptedKeyId     xmlSecKeyDataEncryptedKeyGetKlass()
The <enc:EncryptedKey> processing class.