APIs handled for data encryption

Information about app APIs that are intercepted for encryption and decryption.

Intercepted APIs

Unless otherwise indicated, these APIs are both encrypted and decrypted in the wrapper.

C APIs cannot be considered for interception. If the files handled by C APIs must be encrypted, switch to alternative Objective-C APIs.

NSData

Class	Method
NSData	`- initWithContentsOfFile:`
	`- initWithContentsOfFile:options:error:`
	`- writeToFile:atomically:`
	`- writeToFile:options:error:`
	`+ dataWithContentsOfFile:`
	`+ dataWithContentsOfURL:`
	`- writeToURL:atomically:`

NSString

Class	Method
NSString	`- initWithContentsOfFile:encoding:error:`
	`- initWithContentsOfFile:usedEncoding:error:`
	`- writeToFile:atomically:encoding:error:`
	`- writeToURL:atomically:encoding:error:`

NSFileHandle

Class	Method
NSFileHandle	`+ fileHandleForReadingAtPath:`
	`+ fileHandleForReadingFromURL:error:`
	`+ fileHandleForWritingAtPath:`
	`+ fileHandleForWritingToURL:error:`
	`+ fileHandleForUpdatingAtPath:`
	`+ fileHandleForUpdatingURL:error:`
	`- initWithFileDescriptor:`
	`- initWithFileDescriptor:closeOnDealloc:`
	`- readDataOfLength:`
	`- writeData:`
	`- closeFile`
	`- readDataToEndOfFile`

NSInputStream (Decryption only)

Class	Method
NSInputStream	`- initWithURL:`
	`- read:maxLength:`
	`- close`

NSOutputStream (Encryption only)

Class	Method
NSOutputStream	`- initWithURL:append:`
	`- write:maxLength:`
	`- close`

NSFileManager

Class	Method
NSFileManager	`- createFileAtPath:contents:attributes:`
	`- removeItemAtPath:error:`
	`- copyItemAtPath:toPath:error:`
	`- moveItemAtPath:toPath:error:`

NSUserDefaults

Class	Method
NSUserDefaults	`- objectForKey:`
	`- setObject:forKey:`
	`- boolForKey:`
	`- integerForKey:`
	`- stringForKey:`
	`- persistentDomainForName:`

AVPlayer (Decryption only)

Class	Method
AVPlayer	`- initWithPlayerItem:`

MPMoviePlayerController (Decryption only. Deprecated in iOS 9.0)

Class	Method
MPMoviePlayerController	`- initWithContentURL:`

NSPersistentStoreCoordinator

Class	Method
NSPersistentStoreCoordinator	`- addPersistentStoreWithType:configuration:URL:options:error:`

NSDictionary (Decryption only)

Class	Method
NSDictionary	`+ dictionaryWithContentsOfFile:`

NSKeyedArchiver (Encryption only)

Class	Method
NSKeyedArchiver	`+ archiveRootObject:toFile:`

NSKeyedUnarchiver

Class	Method
NSKeyedUnarchiver	`+ archiveRootObject:toFile:`

(Decryption only)

UIImage (Decryption only)

Class	Method
UIImage	`+ imageWithContentsOfFile:`
	`+ imageNamed:`

AVURLAsset

Class	Method
AVURLAsset	`- initWithURL:options:`

(Decryption only)

sqlite3.c

Class	Method
sqlite3.c	sqlite3_open

Special Case - Support for Core Graphics PDF

To decrypt PDF files dynamically, you must use an Objective-C interface to intercept. MaaS360® provides an Objective-C wrapper for the C function that is used to create PDF references.

thePDFDocRef = [MaaS360AppWrapUtility CGPDFDocumentCreateWithURL:theURL];

You must download two files from MaaS360 Developer Support and include those files in your source code:

MaaS360AppWrapUtility.m
MaaS360AppWrapUtility.h

Include the new Objective-C class file in your source code to the target. The header of this file must be included in the files where the changes are needed.

Non-iOS APIs intercepted

Third-party APIs

Class	Method	Use
MaaS360AppWrapUtility	`+ CGPDFDocumentCreateWithURL:`	Decryption
MFDocumentManager	`- initWithFileUrl:`	Decryption
ReaderDocument	`+ isPDF:`	Decryption
SSZipArchive	`+ unzipFileAtPath:toDestination:`	Decryption/Encryption
ZipArchive	`- addFileToZip:newName:`	Decryption/Encryption