Public Member Functions | |
int | continueCalcDigest (java.lang.Object client_data, PauseCallback pause) |
A callback function used to continue the custom digest calculation process. More... | |
boolean | isNeedPadData () |
Check whether to return all contents with padding zero or not, when callback function SignatureCallback.verifySigState is called. More... | |
void | release () |
A callback function used to release current callback object itself. More... | |
boolean | startCalcDigest (FileReaderCallback file, int[] byte_range_array, Signature signature, java.lang.Object client_data) |
A callback function used to start a custom digest calculation, mainly to initialize the calculation process. More... | |
int | verifySigState (byte[] digest, byte[] signed_data, java.lang.Object client_data) |
A callback function used to do verifying and return the verify state. More... | |
This class represent a callback object to sign or verify signature. All the pure virtual functions in this class are used as callback functions and should be implemented by user, in order to sign or verify signature in a customized way.
User can set register customized signature callback object to Foxit PDF SDK by function common.Library.registerSignatureCallback with filter and sub filter as the callback name.
int com.foxit.sdk.pdf.SignatureCallback.continueCalcDigest | ( | java.lang.Object | client_data, |
PauseCallback | pause | ||
) |
A callback function used to continue the custom digest calculation process.
[in] | pause | Pause object which decides if the calculation process needs to be paused. If this is NULL, it means not to pause during the calculation process. If this is not NULL, please check the the return value of function NeedToPauseNow() of this input parameter and decide when to pause the calculation process. |
[in] | client_data | A user-defined object, which is passed by user from function Signature.startSign or Signature.startVerify . |
boolean com.foxit.sdk.pdf.SignatureCallback.isNeedPadData | ( | ) |
Check whether to return all contents with padding zero or not, when callback function SignatureCallback.verifySigState is called.
void com.foxit.sdk.pdf.SignatureCallback.release | ( | ) |
A callback function used to release current callback object itself.
boolean com.foxit.sdk.pdf.SignatureCallback.startCalcDigest | ( | FileReaderCallback | file, |
int [] | byte_range_array, | ||
Signature | signature, | ||
java.lang.Object | client_data | ||
) |
A callback function used to start a custom digest calculation, mainly to initialize the calculation process.
[in] | file | When signing a signature, this represents the source file object to be signed. When verifying a signature field, this represents the source file object to be verified. |
[in] | byte_range_array | A byte range array of the signed document(not the source document). Elements in this array always be in pairs of offset-size values in order of: offset,size,offset,size... |
[in] | signature | A signature object. |
[in] | client_data | A user-defined object, which is passed by user from function Signature.startSign or Signature.startVerify . |
int com.foxit.sdk.pdf.SignatureCallback.verifySigState | ( | byte [] | digest, |
byte [] | signed_data, | ||
java.lang.Object | client_data | ||
) |
A callback function used to do verifying and return the verify state.
Host application provides this callback function for custom sign mechanism. This callback function would be triggered during the signature verifying process.
[in] | digest | The digest data buffer, for source file buffer to be verified. |
[in] | signed_data | The signed data buffer. |
[in] | client_data | A user-defined object, which is passed by user from function Signature.startSign or Signature.startVerify . |