SignFile Method

Signs a file.

Syntax

• C++
• Objective-C
• C

ANSI (Cross Platform)
int SignFile(const char* lpszSourceFile, const char* lpszDestFile, int bDetached);

Unicode (Windows)
INT SignFile(LPCWSTR lpszSourceFile, LPCWSTR lpszDestFile, BOOL bDetached);

- (void)signFile:(NSString*)sourceFile :(NSString*)destFile :(BOOL)detached;

#define MID_PUBLICKEYCRYPTO_SIGNFILE 10

SECUREBLACKBOX_EXTERNAL int SECUREBLACKBOX_CALL SecureBlackbox_PublicKeyCrypto_Do(void *lpObj, int methid, int cparam, void *param[], int cbparam[], int64 *lpllVal);

Remarks

Use this method to sign a file and save the protected message to another file.

Specify the signing key in Key property before the signing. Please make sure the assigned key has a private key associated with it.

Set Detached parameter to false to create an enveloped/enveloping signature. This maynot be supported by certain algorithms or encryption modes.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)