iPhone SDK CCCrypt 3DES and ECB mode always returns PARAM ERROR

Question

Hi, I've seen quite a lot of posts about CCCrypt and 3DES on the iPhone at various places around the Net, but there does not seem to be a working example of using it with ECB mode, always with PKCS7Padding.

Does anyone have any working code to encrypt and decrypt a passed string using 3DES and ECB mode using the CCCrypt function?

Currently my code (which I admit came from a site somewhere, I think it was Apple's own developer forums) is as follows:

+ (NSString*)doCipher:(NSString*)plainText action:(CCOperation)encryptOrDecrypt { 
 const void *vplainText;
 size_t plainTextBufferSize;

 if (encryptOrDecrypt == kCCDecrypt) {
  NSData *EncryptData = [[NSData alloc] initWithBase64EncodedString:plainText];
  plainTextBufferSize = [EncryptData length];
  vplainText = [EncryptData bytes];
 }
 else {
  //plainTextBufferSize = [plainText length];
  //vplainText = (const void *)[plainText UTF8String];

  NSData *plainTextData = [plainText dataUsingEncoding: NSUTF8StringEncoding]; 
  plainTextBufferSize = [plainTextData length]; 
  vplainText = [plainTextData bytes];
 }

 CCCryptorStatus ccStatus;
 uint8_t *bufferPtr = NULL;
 size_t bufferPtrSize = 0;
 size_t movedBytes = 0;
 // uint8_t ivkCCBlockSize3DES;

 bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1);
 bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t));
 memset((void *)bufferPtr, 0x0, bufferPtrSize);
 // memset((void *) iv, 0x0, (size_t) sizeof(iv));

 NSString *key = @"123456789012345678901234";
 NSString *initVec = @"init Vec";
 const void *vkey = (const void *)[key UTF8String];
 const void *vinitVec = (const void *)[initVec UTF8String];

 ccStatus = CCCrypt(encryptOrDecrypt,
        kCCAlgorithm3DES,
        kCCOptionECBMode,
        vkey, //"123456789012345678901234", //key
        kCCKeySize3DES,
        nil, //"init Vec", //iv,
        vplainText, //"Your Name", //plainText,
        plainTextBufferSize,
        (void *)bufferPtr,
        bufferPtrSize,
        &movedBytes);

 //if (ccStatus == kCCSuccess) NSLog(@"SUCCESS");
 /*else*/ if (ccStatus == kCCParamError) return @"PARAM ERROR";
 else if (ccStatus == kCCBufferTooSmall) return @"BUFFER TOO SMALL";
 else if (ccStatus == kCCMemoryFailure) return @"MEMORY FAILURE";
 else if (ccStatus == kCCAlignmentError) return @"ALIGNMENT";
 else if (ccStatus == kCCDecodeError) return @"DECODE ERROR";
 else if (ccStatus == kCCUnimplemented) return @"UNIMPLEMENTED";

 NSString *result;

 if (encryptOrDecrypt == kCCDecrypt) {
  result = [[[NSString alloc] initWithData:[NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes] encoding:NSASCIIStringEncoding] autorelease];
 }
 else {
  NSData *myData = [NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes];
  result = [myData base64EncodingWithLineLength:movedBytes];
 }

 return result; }

The above ALWAYS fails with PARAM ERROR.