1. Home
  2. Foxit PDF SDK for iOS
  3. How to Encrypt PDF files with Foxit PDF SDK for iOS

How to Encrypt PDF files with Foxit PDF SDK for iOS

Foxit PDF SDK provides a range of encryption and decryption functions to meet different levels of document security protection. Users can use regular password encryption and certificate-driven encryption, or use their own security handler for custom security implementation.


How to encrypt a PDF file with password

#import "ViewController.h"
// Encrypt the source pdf document with specified owner password and user password, the encrypted PDF will be saved to the path specified by parameter savePath.
- (BOOL) encryptPDF: (FSPDFDoc*) pdfDoc ownerPassword: (NSString*)ownerPassword userPassword: (NSString*)userPassword savedPath: (NSString*)savedPath
    if(!pdfDoc || (!ownerPassword && !userPassword) || !savedPath)
        return NO;
    // The encryption setting data. Whether to encrypt meta data:YES, User permission: modify,assemble,fill form. Cipher algorithm:AES 128.
    FSStdEncryptData* encryptData = [[FSStdEncryptData alloc] initWithIs_encrypt_metadata:YES user_permissions: (FSPDFDocPermModify| FSPDFDocPermAssemble|FSPDFDocPermFillForm) cipher:FSSecurityHandlerCipherAES key_length:16];
    FSStdSecurityHandler * stdSecurity = [[FSStdSecurityHandler alloc] init];
    if(![stdSecurity initialize:encryptData user_password:userPassword owner_password:ownerPassword])
        return NO;
    [pdfDoc setSecurityHandler:stdSecurity];
    if(![pdfDoc saveAs:savedPath save_flags:FSPDFDocSaveFlagNormal])
        return NO;
    return YES;
Updated on October 23, 2019

Was this article helpful?

Related Articles