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CGPDFDocument.m
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//
// CGPDFDocument.m
// Reader v2.8.6
//
// Created by Julius Oklamcak on 2011-07-01.
// Copyright © 2011-2015 Julius Oklamcak. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
// of the Software, and to permit persons to whom the Software is furnished to
// do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#import "CGPDFDocument.h"
//
// CGPDFDocumentRef CGPDFDocumentCreateUsingUrl(CFURLRef, NSString *) function
//
CGPDFDocumentRef CGPDFDocumentCreateUsingUrl(CFURLRef theURL, NSString *password)
{
CGPDFDocumentRef thePDFDocRef = NULL; // CGPDFDocument
if (theURL != NULL) // Check for non-NULL CFURLRef
{
thePDFDocRef = CGPDFDocumentCreateWithURL(theURL);
if (thePDFDocRef != NULL) // Check for non-NULL CGPDFDocumentRef
{
if (CGPDFDocumentIsEncrypted(thePDFDocRef) == TRUE) // Encrypted
{
// Try a blank password first, per Apple's Quartz PDF example
if (CGPDFDocumentUnlockWithPassword(thePDFDocRef, "") == FALSE)
{
// Nope, now let's try the provided password to unlock the PDF
if ((password != nil) && (password.length > 0)) // Not blank?
{
char text[128]; // char array buffer for the string conversion
[password getCString:text maxLength:126 encoding:NSUTF8StringEncoding];
if (CGPDFDocumentUnlockWithPassword(thePDFDocRef, text) == FALSE) // Log failure
{
#ifdef DEBUG
NSLog(@"CGPDFDocumentCreateUsingUrl: Unable to unlock [%@] with [%@]", theURL, password);
#endif
}
}
}
if (CGPDFDocumentIsUnlocked(thePDFDocRef) == FALSE) // Cleanup unlock failure
{
CGPDFDocumentRelease(thePDFDocRef), thePDFDocRef = NULL;
}
}
}
}
else // Log an error diagnostic
{
#ifdef DEBUG
NSLog(@"CGPDFDocumentCreateUsingUrl: theURL == NULL");
#endif
}
return thePDFDocRef;
}
//
// CGPDFDocumentRef CGPDFDocumentCreateUsingData(CGDataProviderRef, NSString *) function
//
CGPDFDocumentRef CGPDFDocumentCreateUsingData(CGDataProviderRef dataProvider, NSString *password)
{
CGPDFDocumentRef thePDFDocRef = NULL; // CGPDFDocument
if (dataProvider != NULL) // Check for non-NULL CGDataProviderRef
{
thePDFDocRef = CGPDFDocumentCreateWithProvider(dataProvider);
if (thePDFDocRef != NULL) // Check for non-NULL CGPDFDocumentRef
{
if (CGPDFDocumentIsEncrypted(thePDFDocRef) == TRUE) // Encrypted
{
// Try a blank password first, per Apple's Quartz PDF example
if (CGPDFDocumentUnlockWithPassword(thePDFDocRef, "") == FALSE)
{
// Nope, now let's try the provided password to unlock the PDF
if ((password != nil) && (password.length > 0)) // Not blank?
{
char text[128]; // char array buffer for the string conversion
[password getCString:text maxLength:126 encoding:NSUTF8StringEncoding];
if (CGPDFDocumentUnlockWithPassword(thePDFDocRef, text) == FALSE) // Log failure
{
#ifdef DEBUG
NSLog(@"CGPDFDocumentCreateUsingData: Unable to unlock data with '%@'", password);
#endif
}
}
}
if (CGPDFDocumentIsUnlocked(thePDFDocRef) == FALSE) // Cleanup unlock failure
{
CGPDFDocumentRelease(thePDFDocRef), thePDFDocRef = NULL;
}
}
}
}
else // Log an error diagnostic
{
#ifdef DEBUG
NSLog(@"CGPDFDocumentCreateUsingData: theURL == NULL");
#endif
}
return thePDFDocRef;
}
//
// BOOL CGPDFDocumentUrlNeedsPassword(CFURLRef, NSString *) function
//
BOOL CGPDFDocumentUrlNeedsPassword(CFURLRef theURL, NSString *password)
{
BOOL needPassword = NO; // Default flag
if (theURL != NULL) // Check for non-NULL CFURLRef
{
CGPDFDocumentRef thePDFDocRef = CGPDFDocumentCreateWithURL(theURL);
if (thePDFDocRef != NULL) // Check for non-NULL CGPDFDocumentRef
{
if (CGPDFDocumentIsEncrypted(thePDFDocRef) == TRUE) // Encrypted
{
// Try a blank password first, per Apple's Quartz PDF example
if (CGPDFDocumentUnlockWithPassword(thePDFDocRef, "") == FALSE)
{
// Nope, now let's try the provided password to unlock the PDF
if ((password != nil) && (password.length > 0)) // Not blank?
{
char text[128]; // char array buffer for the string conversion
[password getCString:text maxLength:126 encoding:NSUTF8StringEncoding];
if (CGPDFDocumentUnlockWithPassword(thePDFDocRef, text) == FALSE)
{
needPassword = YES;
}
}
else
{
needPassword = YES;
}
}
}
CGPDFDocumentRelease(thePDFDocRef); // Cleanup CGPDFDocumentRef
}
}
else // Log an error diagnostic
{
#ifdef DEBUG
NSLog(@"CGPDFDocumentUrlNeedsPassword: theURL == NULL");
#endif
}
return needPassword;
}
//
// BOOL CGPDFDocumentUrlNeedsPassword(CGDataProviderRef, NSString *) function
//
BOOL CGPDFDocumentDataNeedsPassword(CGDataProviderRef dataProvider, NSString *password)
{
BOOL needPassword = NO; // Default flag
if (dataProvider != NULL) // Check for non-NULL CGDataProviderRef
{
CGPDFDocumentRef thePDFDocRef = CGPDFDocumentCreateWithProvider(dataProvider);
if (thePDFDocRef != NULL) // Check for non-NULL CGPDFDocumentRef
{
if (CGPDFDocumentIsEncrypted(thePDFDocRef) == TRUE) // Encrypted
{
// Try a blank password first, per Apple's Quartz PDF example
if (CGPDFDocumentUnlockWithPassword(thePDFDocRef, "") == FALSE)
{
// Nope, now let's try the provided password to unlock the PDF
if ((password != nil) && (password.length > 0)) // Not blank?
{
char text[128]; // char array buffer for the string conversion
[password getCString:text maxLength:126 encoding:NSUTF8StringEncoding];
if (CGPDFDocumentUnlockWithPassword(thePDFDocRef, text) == FALSE)
{
needPassword = YES;
}
}
else
{
needPassword = YES;
}
}
}
CGPDFDocumentRelease(thePDFDocRef); // Cleanup CGPDFDocumentRef
}
}
else // Log an error diagnostic
{
#ifdef DEBUG
NSLog(@"CGPDFDocumentUrlNeedsPassword: theURL == NULL");
#endif
}
return needPassword;
}
// EOF