6.3 Lock/Unlock Data

6.3.1 Lock Data

The lockData:success:failure method of BayunCore class locks NSData with default encryption-policy and key-generation-policy dictated by server settings.

Method parameters :

• data : Data to be locked.

  • dataType : NSData

• success : Success block to be executed after data is successfully locked, returns locked data.

• failure : Failure block to be executed if locking fails, returns BayunError.

Objective-C

NSData *data = [[NSData alloc] initWithContentsOfFile:@"<FileName.txt>"];
[[BayunCore sharedInstance] lockData:data success:^(NSData *lockedData) {
    NSLog(@"Data locked successfully.");   
} failure:^(BayunError errorCode) {
    NSLog(@"Error locking data.");    
}];

Swift

6.3.2 Lock Data with Encryption Policy, Key Generation Policy

The lockData:encryptionPolicy:keyGenerationPolicy:groupId:success:failure method with encryption-policy as an optional parameter locks data with the encryption key dictated by the policy. The method takes the following parameters :

• text : Data to be locked.

  • dataType : NSData

• encryptionPolicy : BayunEncryptionPolicy determines the key for locking.

• keyGenerationPolicy : BayunKeyGenerationPolicy determines the policy to generate the data encryption key.

• groupId : GroupId is required if encryptionPolicy is BayunEncryptionPolicyGroup.

• success : Success block to be executed after data is successfully locked, returns locked data.

• failure : Failure block to be executed if locking fails, returns BayunError.

If encryption-policy is other than BayunEncryptionPolicyGroup then groupId should be nil.

Objective-C

[[BayunCore sharedInstance] lockData:data
                    encryptionPolicy:encryptionPolicy
                 keyGenerationPolicy:(BayunKeyGenerationPolicy)keyGenerationPolicy
                             groupId:groupId
                             success:^(NSString *lockedText)
      NSLog("Data locked successfully.") ;                   
} failure:^(BayunError errorCode) {
      NSLog(@"Error locking data.");
}];

Swift

6.3.3 Unlock Data

The unlockData method of BayunCore class unlocks a locked NSData. The method takes the following parameters :

• data : Data to be unlocked.

  • dataType : NSData

• success : Success block to be executed after data is successfuly unlocked, returns unlocked data.

• failure : Failure block to be executed if unlocking fails, returns BayunError.

ObjectiveC

[[BayunCore sharedInstance] unlockData:lockedData success:^(NSData *unlockedData) {
    NSLog(@"Data unlocked successfully.");  
} failure:^(BayunError errorCode) {
    NSLog(@"Error unlocking data.");    
}];

Swift