How do I convert a byte array to UIImage - ios
I have a webservice which sends me back an array of bytes like this:
<ax23:IMGBLOB>-119,80,78,71,13,10,26,10,0,0,0,13,73,72,68,82,0,0,0,100,0,0,0,106,8,3,0,0,0,125,54,4,22,0,0,0,51,80,76,84,69,0,0,0,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-73,-107,-30,-126,0,0,0,16,116,82,78,83,0,16,32,48,64,80,96,112,-128,-112,-96,-80,-64,-48,-32,-16,84,-32,-88,-56,0,0,2,126,73,68,65,84,120,-38,-19,90,65,-110,-124,32,12,4,68,64,69,-32,-1,-81,-35,-53,-78,-96,40,4,-79,-70,118,-86,-90,-113,51,106,-101,116,-120,33,-127,-3,43,72,101,-84,13,127,-80,-42,40,-7,42,-63,100,108,-72,-124,53,-45,75,38,-84,62,84,-32,-41,97,-125,-72,118,-95,9,-89,-7,0,-123,-56,-115,-88,-101,35,-98,90,-79,-122,14,-84,-113,-84,49,62,116,-63,-101,126,-71,-9,112,-58,-66,25,45,127,-95,-51,118,113,-127,-20,52,-29,124,-1,34,121,-31,78,-71,-100,-119,76,-113,-32,-5,-111,65,-117,-37,43,-11,-23,82,65,118,-107,63,40,42,91,-21,-24,-96,12,-47,101,-22,64,33,8,-122,31,104,20,-123,99,9,9,-106,104,-67,-80,-7,123,-79,38,-78,-73,114,51,35,99,118,29,44,-21,-45,-27,-59,-13,59,-87,-66,-14,-118,117,66,-91,120,89,104,-102,-69,7,57,124,114,20,-11,101,-118,119,-2,40,-37,-91,69,35,111,99,-60,-25,28,99,44,-2,46,46,-9,-100,99,-108,101,-81,-28,-85,-56,49,-50,98,-86,-126,56,-50,6,-64,93,41,75,-23,44,63,13,86,29,-2,-34,97,38,69,-33,32,-44,-83,-61,-72,-89,-26,4,122,102,-14,-68,-8,-93,16,100,80,-106,-14,-123,69,52,113,102,47,96,-114,79,19,-105,-122,88,-10,10,-74,43,83,-72,-49,-87,-57,33,-82,84,-47,45,-43,-71,-115,5,92,-97,-10,-102,37,-72,104,72,-43,126,111,120,-81,41,46,91,-20,-51,-16,-115,-9,-88,94,83,100,-15,-53,116,79,18,97,37,113,-35,23,-17,-19,99,30,-72,5,-79,-24,45,-77,-108,63,-77,-22,54,9,-67,-24,-43,39,-17,-104,40,123,-101,-124,94,-58,-120,83,2,-77,77,111,-79,112,-126,-99,-88,-2,-78,-57,39,24,2,73,-62,-62,-119,53,-5,49,-128,101,23,73,-16,21,9,-53,-57,-86,72,73,35,73,112,-110,17,-18,81,-71,93,59,-103,36,-63,-118,-74,40,38,-41,125,35,-112,-108,48,-68,-107,-118,109,78,98,-70,72,8,-27,-84,73,36,-55,119,68,18,-54,86,-79,-44,-102,16,92,44,84,-79,93,74,35,7,73,74,-97,1,72,66,-104,-21,36,60,102,-78,33,18,-53,10,8,8,9,-64,93,31,41,-4,90,13,97,-56,98,-124,-92,21,72,-126,28,77,-11,27,37,-43,67,62,90,-112,-49,47,-94,-112,24,40,-119,4,-71,36,-126,20,119,-112,50,21,89,112,-89,-51,68,-101,-60,78,-99,91,7,-56,38,8,-79,-99,-125,108,76,-79,91,-20,-9,-101,5,54,122,6,-46,-10,64,52,112,32,-83,40,68,83,13,-47,30,-124,52,58,17,45,91,68,-13,25,-46,70,71,12,4,16,-93,13,-64,-112,102,37,-113,-101,-74,-66,113,-45,22,18,7,98,112,6,29,1,-30,-121,-103,-8,-79,108,57,96,118,-75,1,-77,43,6,-52,-128,81,57,116,-24,-113,63,-66,-128,63,-120,-127,63,82,66,63,28,99,56,-2,-104,15,-2,-64,-46,-8,-47,-85,47,-66,-8,-30,-77,-16,3,-74,-58,-81,-89,-116,-22,56,-74,0,0,0,0,73,69,78,68,-82,66,96,-126,####</ax23:IMGBLOB>
This array of bytes are used in Java for obtaining an image, I've been trying with several methods without success, I will post one of them below:
-(UIImageView *)convierteImagen: (NSMutableString *)cadenaImagen{
//NSString to NSData (temporary)
NSData *tempData = [cadenaImagen dataUsingEncoding:NSUTF8StringEncoding];
//NSLog(#"datos crudos: %#", tempData);
//2.NSData to Bytes
const void *bytes2 = [tempData bytes];
int8_t *bytes = (int8_t*)bytes2;
int len = tempData.length;
cadenaImagen = [[NSMutableString alloc]init];
[cadenaImagen appendString:#"["];
for (int i = 0; i < len; i++) {
if (i) [cadenaImagen appendString:#","];
[cadenaImagen appendFormat:#"%d", bytes[i]];
}
[cadenaImagen appendString:#"]"];
//3.Bytes to NSData
NSData *datos2 = [NSData dataWithBytes:bytes length:len];
return [[UIImageView alloc]initWithImage:[UIImage imageWithData:datos2]];
}
and the way I call this method is:
- (void)viewDidLoad
{
[super viewDidLoad];
NSMutableString *imagen = [[NSMutableString alloc] initWithString:#"-119,80,78,71,13,10,26,10,0,0,0,13,73,72,68,82,0,0,0,100,0,0,0,106,8,3,0,0,0,125,54,4,22,0,0,0,51,80,76,84,69,0,0,0,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-73,-107,-30,-126,0,0,0,16,116,82,78,83,0,16,32,48,64,80,96,112,-128,-112,-96,-80,-64,-48,-32,-16,84,-32,-88,-56,0,0,2,126,73,68,65,84,120,-38,-19,90,65,-110,-124,32,12,4,68,64,69,-32,-1,-81,-35,-53,-78,-96,40,4,-79,-70,118,-86,-90,-113,51,106,-101,116,-120,33,-127,-3,43,72,101,-84,13,127,-80,-42,40,-7,42,-63,100,108,-72,-124,53,-45,75,38,-84,62,84,-32,-41,97,-125,-72,118,-95,9,-89,-7,0,-123,-56,-115,-88,-101,35,-98,90,-79,-122,14,-84,-113,-84,49,62,116,-63,-101,126,-71,-9,112,-58,-66,25,45,127,-95,-51,118,113,-127,-20,52,-29,124,-1,34,121,-31,78,-71,-100,-119,76,-113,-32,-5,-111,65,-117,-37,43,-11,-23,82,65,118,-107,63,40,42,91,-21,-24,-96,12,-47,101,-22,64,33,8,-122,31,104,20,-123,99,9,9,-106,104,-67,-80,-7,123,-79,38,-78,-73,114,51,35,99,118,29,44,-21,-45,-27,-59,-13,59,-87,-66,-14,-118,117,66,-91,120,89,104,-102,-69,7,57,124,114,20,-11,101,-118,119,-2,40,-37,-91,69,35,111,99,-60,-25,28,99,44,-2,46,46,-9,-100,99,-108,101,-81,-28,-85,-56,49,-50,98,-86,-126,56,-50,6,-64,93,41,75,-23,44,63,13,86,29,-2,-34,97,38,69,-33,32,-44,-83,-61,-72,-89,-26,4,122,102,-14,-68,-8,-93,16,100,80,-106,-14,-123,69,52,113,102,47,96,-114,79,19,-105,-122,88,-10,10,-74,43,83,-72,-49,-87,-57,33,-82,84,-47,45,-43,-71,-115,5,92,-97,-10,-102,37,-72,104,72,-43,126,111,120,-81,41,46,91,-20,-51,-16,-115,-9,-88,94,83,100,-15,-53,116,79,18,97,37,113,-35,23,-17,-19,99,30,-72,5,-79,-24,45,-77,-108,63,-77,-22,54,9,-67,-24,-43,39,-17,-104,40,123,-101,-124,94,-58,-120,83,2,-77,77,111,-79,112,-126,-99,-88,-2,-78,-57,39,24,2,73,-62,-62,-119,53,-5,49,-128,101,23,73,-16,21,9,-53,-57,-86,72,73,35,73,112,-110,17,-18,81,-71,93,59,-103,36,-63,-118,-74,40,38,-41,125,35,-112,-108,48,-68,-107,-118,109,78,98,-70,72,8,-27,-84,73,36,-55,119,68,18,-54,86,-79,-44,-102,16,92,44,84,-79,93,74,35,7,73,74,-97,1,72,66,-104,-21,36,60,102,-78,33,18,-53,10,8,8,9,-64,93,31,41,-4,90,13,97,-56,98,-124,-92,21,72,-126,28,77,-11,27,37,-43,67,62,90,-112,-49,47,-94,-112,24,40,-119,4,-71,36,-126,20,119,-112,50,21,89,112,-89,-51,68,-101,-60,78,-99,91,7,-56,38,8,-79,-99,-125,108,76,-79,91,-20,-9,-101,5,54,122,6,-46,-10,64,52,112,32,-83,40,68,83,13,-47,30,-124,52,58,17,45,91,68,-13,25,-46,70,71,12,4,16,-93,13,-64,-112,102,37,-113,-101,-74,-66,113,-45,22,18,7,98,112,6,29,1,-30,-121,-103,-8,-79,108,57,96,118,-75,1,-77,43,6,-52,-128,81,57,116,-24,-113,63,-66,-128,63,-120,-127,63,82,66,63,28,99,56,-2,-104,15,-2,-64,-46,-8,-47,-85,47,-66,-8,-30,-77,-16,3,-74,-58,-81,-89,-116,-22,56,-74,0,0,0,0,73,69,78,68,-82,66,96,-126"];
[self.view addSubview:[self convierteImagen:imagen]];
}
Any help I will appreciate :)
try this:
-(UIImageView *)convierteImagen: (NSMutableString *)cadenaImagen{
NSArray *strings = [cadenaImagen componentsSeparatedByString:#","];
unsigned c = strings.count;
uint8_t *bytes = malloc(sizeof(*bytes) * c);
unsigned i;
for (i = 0; i < c; i++)
{
NSString *str = [strings objectAtIndex:i];
int byte = [str intValue];
bytes[i] = (uint8_t)byte;
}
NSData *datos = [NSData dataWithBytes:bytes length:c];
UIImage *image = [UIImage imageWithData:datos];
return [[UIImageView alloc]initWithImage:image];
}
on viewdidLoad is the same code you put:
- (void)viewDidLoad
{
[super viewDidLoad];
NSMutableString *imagen = [[NSMutableString alloc] initWithString:#"-119,80,78,71,13,10,26,10,0,0,0,13,73,72,68,82,0,0,0,100,0,0,0,106,8,3,0,0,0,125,54,4,22,0,0,0,51,80,76,84,69,0,0,0,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-73,-107,-30,-126,0,0,0,16,116,82,78,83,0,16,32,48,64,80,96,112,-128,-112,-96,-80,-64,-48,-32,-16,84,-32,-88,-56,0,0,2,126,73,68,65,84,120,-38,-19,90,65,-110,-124,32,12,4,68,64,69,-32,-1,-81,-35,-53,-78,-96,40,4,-79,-70,118,-86,-90,-113,51,106,-101,116,-120,33,-127,-3,43,72,101,-84,13,127,-80,-42,40,-7,42,-63,100,108,-72,-124,53,-45,75,38,-84,62,84,-32,-41,97,-125,-72,118,-95,9,-89,-7,0,-123,-56,-115,-88,-101,35,-98,90,-79,-122,14,-84,-113,-84,49,62,116,-63,-101,126,-71,-9,112,-58,-66,25,45,127,-95,-51,118,113,-127,-20,52,-29,124,-1,34,121,-31,78,-71,-100,-119,76,-113,-32,-5,-111,65,-117,-37,43,-11,-23,82,65,118,-107,63,40,42,91,-21,-24,-96,12,-47,101,-22,64,33,8,-122,31,104,20,-123,99,9,9,-106,104,-67,-80,-7,123,-79,38,-78,-73,114,51,35,99,118,29,44,-21,-45,-27,-59,-13,59,-87,-66,-14,-118,117,66,-91,120,89,104,-102,-69,7,57,124,114,20,-11,101,-118,119,-2,40,-37,-91,69,35,111,99,-60,-25,28,99,44,-2,46,46,-9,-100,99,-108,101,-81,-28,-85,-56,49,-50,98,-86,-126,56,-50,6,-64,93,41,75,-23,44,63,13,86,29,-2,-34,97,38,69,-33,32,-44,-83,-61,-72,-89,-26,4,122,102,-14,-68,-8,-93,16,100,80,-106,-14,-123,69,52,113,102,47,96,-114,79,19,-105,-122,88,-10,10,-74,43,83,-72,-49,-87,-57,33,-82,84,-47,45,-43,-71,-115,5,92,-97,-10,-102,37,-72,104,72,-43,126,111,120,-81,41,46,91,-20,-51,-16,-115,-9,-88,94,83,100,-15,-53,116,79,18,97,37,113,-35,23,-17,-19,99,30,-72,5,-79,-24,45,-77,-108,63,-77,-22,54,9,-67,-24,-43,39,-17,-104,40,123,-101,-124,94,-58,-120,83,2,-77,77,111,-79,112,-126,-99,-88,-2,-78,-57,39,24,2,73,-62,-62,-119,53,-5,49,-128,101,23,73,-16,21,9,-53,-57,-86,72,73,35,73,112,-110,17,-18,81,-71,93,59,-103,36,-63,-118,-74,40,38,-41,125,35,-112,-108,48,-68,-107,-118,109,78,98,-70,72,8,-27,-84,73,36,-55,119,68,18,-54,86,-79,-44,-102,16,92,44,84,-79,93,74,35,7,73,74,-97,1,72,66,-104,-21,36,60,102,-78,33,18,-53,10,8,8,9,-64,93,31,41,-4,90,13,97,-56,98,-124,-92,21,72,-126,28,77,-11,27,37,-43,67,62,90,-112,-49,47,-94,-112,24,40,-119,4,-71,36,-126,20,119,-112,50,21,89,112,-89,-51,68,-101,-60,78,-99,91,7,-56,38,8,-79,-99,-125,108,76,-79,91,-20,-9,-101,5,54,122,6,-46,-10,64,52,112,32,-83,40,68,83,13,-47,30,-124,52,58,17,45,91,68,-13,25,-46,70,71,12,4,16,-93,13,-64,-112,102,37,-113,-101,-74,-66,113,-45,22,18,7,98,112,6,29,1,-30,-121,-103,-8,-79,108,57,96,118,-75,1,-77,43,6,-52,-128,81,57,116,-24,-113,63,-66,-128,63,-120,-127,63,82,66,63,28,99,56,-2,-104,15,-2,-64,-46,-8,-47,-85,47,-66,-8,-30,-77,-16,3,-74,-58,-81,-89,-116,-22,56,-74,0,0,0,0,73,69,78,68,-82,66,96,-126"];
[self.view addSubview:[self convierteImagen: imagen]];
}
this is what I got with your byte array:
so I think this should solve your problem ;)
Related
HashValue mis match in PayUMoney framework, iOS - Objective-C
I got error like Hash value Mismatch from PayUMoney payment gateway
Here is my code which I did, please let me know where is issue
PUMTxnParam *txnParam= [[PUMTxnParam alloc] init];
//Set the parameters
txnParam.phone = [[NSUserDefaults standardUserDefaults] valueForKey:#"mobile"];
txnParam.email = [[NSUserDefaults standardUserDefaults] valueForKey:#"username"];
txnParam.amount = _txtCash.text;
txnParam.environment = PUMEnvironmentProduction;
txnParam.firstname = [[NSUserDefaults standardUserDefaults] valueForKey:#"name1"];
txnParam.key = #"xxxxxxxx";
txnParam.merchantid = #"xxxxxxx";
txnParam.txnID = [txnData valueForKey:#"txnid"];
txnParam.surl = #"https://google.com/";
txnParam.furl = #"https://google.com/";
txnParam.productInfo = #"My App";
txnParam.udf1 = #"";
txnParam.udf2 = #"";
txnParam.udf3 = #"";
txnParam.udf4 = #"";
txnParam.udf5 = #"";
txnParam.hashValue = [self createSHA512:[NSString stringWithFormat:#"%#|%#|%#|%#|%#|%#|%#|%#|%#|%#|%#||||||%#|",txnParam.key,txnParam.txnID,txnParam.amount,txnParam.productInfo,txnParam.firstname,txnParam.email,txnParam.udf1,txnParam.udf2,txnParam.udf3,txnParam.udf4,txnParam.udf5,#"dxltF25QEp"]];
-(NSString *)createSHA512:(NSString *)string
{
const char *cstr = [string cStringUsingEncoding:NSUTF8StringEncoding];
NSData *data = [NSData dataWithBytes:cstr length:string.length];
uint8_t digest[CC_SHA512_DIGEST_LENGTH];
CC_SHA512(data.bytes, (CC_LONG)data.length, digest);
NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA512_DIGEST_LENGTH * 2];
for(int i = 0; i < CC_SHA512_DIGEST_LENGTH; i++)
[output appendFormat:#"%02x", digest[i]];
return output;
}
Please help to clear this out.
Cocoa pods and Github have their old libraries, I just copied the library from their example which is in GitHub and it works fine :)
NSString from NSData is incomplete
When I use [[NSString alloc] initWithData:subdata encoding:encoding] method , I find the string is incomplete. Why? Any restrictions in NSString?
Then，I suspect that the data is too large，so I create a new method to Transfer.
-(NSString *)stringFromData:(NSData *)data encoding:(NSStringEncoding)encoding{
NSInteger DataLen = data.length;
NSInteger segLen = 5000;
NSInteger times = DataLen/segLen;
NSInteger fristLen = DataLen%segLen;
NSMutableString *str = [NSMutableString string];
[str appendString:[[NSString alloc] initWithData:[data subdataWithRange:NSMakeRange(0, fristLen)] encoding:encoding]];
NSLog(#"%#",str);
while (times--) {
NSData *subdata = [data subdataWithRange:NSMakeRange(fristLen, segLen)] ;
if (subdata) {
NSString*substr = [[NSString alloc] initWithData:subdata encoding:encoding]; //tag1
NSLog(#"%#",substr);
if (substr) {
[str appendString:substr];
}
fristLen += segLen;
}else{
break;
}
}
return str;
}
but in tag1, I find the string is null in some conditions. What is the problem?
How can we encrypt bytes through DES/CBC/NOPADDING in Objective C?
I am trying to encrypt bytes data through DES/CBS/NOPADDING algorithm but unable to get correct output. What I have tried is given below in code. Please have a look and suggest.
#import "STEncryptViewController.h"
#import <CommonCrypto/CommonCryptor.h>
#import "STEncryptorDES.h"
#import "NSData+Base64.h"
#import <CommonCrypto/CommonDigest.h>
#define KEY #"MY_TEST_KEY"
#interface STEncryptViewController ()
#end
#implementation STEncryptViewController
#synthesize message;
#synthesize encrypted;
#synthesize decrypted;
#synthesize key;
#synthesize outputMessage;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}
- (IBAction)encrypt:(id)sender
{
const unsigned char bytes[] = {65,17,17,17,17,17,17,17};
NSData *data = [NSData dataWithBytes:bytes length:sizeof(bytes)];
NSString *str = self.key.text;
NSData* data12 = [str dataUsingEncoding:NSUTF8StringEncoding];
NSUInteger len = str.length;
uint8_t *bytes1 = (uint8_t *)[data12 bytes];
NSMutableString *result = [NSMutableString stringWithCapacity:len * 3];
// [result appendString:#"["];
//Key convertion
int i = 0;
while(i < len){
if (i) {
[result appendString:#","];
}
[result appendFormat:#"%d", bytes1[i]];
i++;
}
// [result appendString:#"]"];
NSLog (#"String is %#",str);
NSLog (#"Byte array is %#",result);
//
Byte iv1 [] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
Byte iv [] = {1, 35, 69, 103, -119, -85, -51, -17};
NSData *ivData = [NSData dataWithBytes:iv length:sizeof(iv)];
NSData *encryptedData = [STEncryptorDES encryptData1:data key:[NSData dataWithBytes:iv1 length:sizeof(iv1)] iv:ivData];
NSLog(#"encrypted : %#", [encryptedData base64EncodedString]);
self.outputMessage.text = [NSString stringWithFormat:#"Encrypted String ::>> %#",[encryptedData base64EncodedString]];
[self doCipher:nil enc:kCCEncrypt];
}
- (NSData *)md5DataFromString:(NSString *)input
{
const char *cStr = [input UTF8String];
unsigned char digest[16];
CC_MD5( cStr, strlen(cStr), digest ); // This is the md5 call
return [NSData dataWithBytes:digest length:CC_MD5_DIGEST_LENGTH];
}
- (IBAction)decrypt:(id)sender
{
NSData *valueData = [self hexToBytes:self.decrypted.text];
NSData *keyData = [self md5DataFromString:self.key.text];
Byte iv [] = {1, 35, 69, 103, -119, -85, -51, -17};
NSData *ivData = [NSData dataWithBytes:iv length:sizeof(iv)];
NSData *decryptedData = [STEncryptorDES decryptData:valueData key:keyData iv:ivData];
NSLog(#"decrypted : %#", [[NSString alloc] initWithData:decryptedData encoding:NSASCIIStringEncoding]);
self.outputMessage.text = [NSString stringWithFormat:#"Decrypted String ::>> %#", [[NSString alloc] initWithData:decryptedData encoding:NSASCIIStringEncoding]];
}
- (NSString*)doCipher:(NSString*)plainText enc:(CCOperation)encryptOrDecrypt{
NSData *key123 = [self hexToBytes:#"MY_TEST_KEY"];
const void *vplainText;
size_t plainTextBufferSize;
if (encryptOrDecrypt == kCCDecrypt)
{
NSData *EncryptData = [self hexToBytes:#"5454545454545454"];
// NSData *EncryptData =[NSData dataWithBase64EncodedString:plainText];
plainTextBufferSize = [EncryptData length];
vplainText = [EncryptData bytes];
}
else
{
plainTextBufferSize = [plainText length];
vplainText = (const void *) [plainText UTF8String];
}
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);
unsigned char cKey[FBENCRYPT_KEY_SIZE];
bzero(cKey, sizeof(cKey));
[key123 getBytes:cKey length:FBENCRYPT_KEY_SIZE];
//unsigned char result1[24]= {0,0,0,0,0,0,0,0,0,0,0,00,0,0,0,0,0,0,0,00,00,00,00,0};
unsigned char IV3[8]={1, 35, 69, 103, -119, -85, -51, -17};
uint8_t iv[kCCBlockSize3DES];
memset((void *) iv, 0x0, (size_t) sizeof(iv));
ccStatus = CCCrypt(encryptOrDecrypt,
kCCAlgorithm3DES,
0x0000 ,
cKey, //"123456789012345678901234", //key
kCCKeySize3DES,
IV3 , //iv,
vplainText, //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];
}
else
{
NSData *myData = [NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes];
NSLog(#"data is: %#", myData);
// result = [NSData base64StringFromData:myData length:myData.length];
// result = [[NSString alloc]initWithData:myData encoding:NSUTF8StringEncoding];
result = nil;
}
return result;
}
-(NSData*)hexToBytes:(NSString *)hex {
NSString *safeStr = [hex stringByReplacingOccurrencesOfString:#"0" withString:#"A"];
NSMutableData* data = [NSMutableData data];
int idx;
for (idx = 0; idx+2 <= safeStr.length; idx+=2) {
NSRange range = NSMakeRange(idx, 2);
NSString* hexStr = [safeStr substringWithRange:range];
NSScanner* scanner = [NSScanner scannerWithString:hexStr];
unsigned int intValue;
[scanner scanHexInt:&intValue];
[data appendBytes:&intValue length:1];
}
NSLog(#"%lu",(unsigned long)data.hash);
return data;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
This was my all effort. Currently it is working but not expected output getting. Please suggest me what am I missing here?
One glaring error is that STEncryptorDES is used and is specifies padding but the question states that padding should be used. Observations: - You call doCipher with nil and do not use it's return value, delete the unneeded/unused code from the question. - There is a lot of code to perform a rather simple operation. - It seems that the test data variable is named iv1, use a better name if that is correct. - DES should not be used for new work, only when necessary to interoperate with existing work, it is not very secure. New work should use AES. - #synthesize has not been needed for several years.
In cryptography "DESede/CBC/NoPadding" use following code might be help for you.
Byte iv [] = {1, 35, 69, 103, -119, -85, -51, -17};
NSData *ivData = [NSData dataWithBytes:iv length:sizeof(iv)];
NSData key = ["MY_TEST_KEY" dataUsingEncoding:NSUTF8StringEncoding]
char cKey[key.length];
bzero(cKey, sizeof(cKey));
[key getBytes:cKey length:key.length];
// setup iv
char cIv[kCCBlockSizeDES];
bzero(cIv, kCCBlockSizeDES);
if (ivData) {
[ivData getBytes:cIv length:kCCBlockSizeDES];
}
// setup output buffer
size_t bufferSize = [data length] + kCCBlockSizeDES;
void *buffer = malloc(bufferSize);
// do encrypt
size_t encryptedSize = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt,
kCCAlgorithm3DES,
ccNoPadding,
cKey,
key.length,
cIv,
[data bytes],
[data length],
buffer,
bufferSize,
&encryptedSize);
if (cryptStatus == kCCSuccess) {
resultData = [NSData dataWithBytes:buffer length:encryptedSize];
free(buffer);
} else {
free(buffer);
NSLog(#"[ERROR] failed to encrypt|CCCryptoStatus: %d", cryptStatus);
return nil;
}
iOS Adding Dynamic Values to Array
I want to add dynamic values of UIImage in array which initialised in the for loop, So I created a NSMutableArray to set object first in for loop and later tried to retrieve values from that.
Please can you look where I am going wrong and what should be best approch while adding the dynamic values.
NSMutableDictionary * dic= [[NSMutableDictionary alloc]init];
NSMutableArray *cImages = [[NSMutableArray alloc]init];
for(int i=0; i<5; i++) {
NSString * imageKey= [NSString stringWithFormat:#"image%i",i+1];
NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString: [[results objectAtIndex:i]valueForKey:imageKey]]];
UIImage *imageOne = [UIImage imageWithData:imageData];
[dic setObject:imageOne forKey:imageKey];
}
for (NSString *key in dic) {
NSString *sprite = [dic objectForKey:key];
//adding below to the array
[cImages addObject:sprite];
}
What's wrong with just adding UIImage's to the mutable array?
NSMutableArray *cImages = [[NSMutableArray alloc]init];
for(int i = 0; i < 5; i++)
{
NSString *imageKey= [NSString stringWithFormat:#"image%i", i+1];
UIImage *imageToAdd = [UIImage imageNamed:imageKey];
[cImages addObject:imageToAdd];
}
// Using the images
for (UIImage *image in cImages)
{
// Do whatever u want with each image.
}
If you really need to use a dictionary to access the UIImage's by the names "image1, image2" etc you can do this:
NSDictionary *dict = [[NSDictionary alloc] init];
for (int i = 0; i < 5; i++)
{
NSString *imageKey = [NSString stringWithFormat:#"image%i", i+1];
UIImage *image = [UIImage imageNamed:#"nameOfImageFile.png"];
[dict setObject:image forKey:imageKey];
}
// Now you can access the UIImage values by their names (image1,image2,image3,image4,image5)
UIImage *imageToUse = [dict valueForKey:#"image1"];
(haven't test these, but it's fairly standard).
How do I send an array of integers via GKSession bluetooth
I have a problem with sending an array of integers via GKSession.
This is how I did it:
To send it.
-(void)sendData {
NSMutableArray *myArray = [[NSMutableArray alloc] init];
[myArray addObject:[NSNumber numberWithInteger:snakeHead.position.x]];
[myArray addObject:[NSNumber numberWithInteger:snakeHead.position.y]];
[myArray addObject:[NSNumber numberWithInteger:direction.x]];
[myArray addObject:[NSNumber numberWithInteger:direction.y]];
[myArray addObject:[NSNumber numberWithInteger:bodyOffsetX]];
[myArray addObject:[NSNumber numberWithInteger:bodyOffsetY]];
[myArray addObject:[NSNumber numberWithInteger:amountBodies]];
NSData* encodedArray = [NSKeyedArchiver archivedDataWithRootObject:myArray];
[snakeSession sendData:encodedArray toPeers:snakePeers withDataMode:GKSendDataReliable
error:nil];
[encodedArray release];
}
The sendData function is called from a scheduler.
To receive it.
-(void)receiveData:(NSData *)data fromPeer:(NSString *)peer inSession:(GKSession *)session
context:(void *)context {
NSArray *hisArray = [NSKeyedUnarchiver unarchiveObjectWithData:data];
snakeHead2.position = ccp([[hisArray objectAtIndex:0] integerValue],
[[hisArray objectAtIndex:1] integerValue]);
direction2 = ccp([[hisArray objectAtIndex:2] integerValue],
[[hisArray objectAtIndex:3] integerValue]);
bodyOffsetX2 = [[hisArray objectAtIndex:4] integerValue];
bodyOffsetY2 = [[hisArray objectAtIndex:5] integerValue];
amountBodies2 = [[hisArray objectAtIndex:6] integerValue];
}
This does not work and the game crashes.
So what am I doing wrong here?
heres what I would do. it even sends less bytes! (faster)
// to send
int snakeHead_position_x = 0;
int snakeHead_position_y = 0;
int direction_x = 0;
int direction_y = 0;
int bodyOffsetX = 0;
int bodyOffsetY = 0;
int amountBodies = 0;
NSString *package = [NSString stringWithFormat:#"%i|%i|%i|%i|%i|%i|%i",
snakeHead_position_x, snakeHead_position_y, direction_x,
direction_y, bodyOffsetX, bodyOffsetY, amountBodies];
NSData *data = [package dataUsingEncoding:NSASCIIStringEncoding];
assert(data); // this is critical don't remove!
//printf("sending %u bytes...\n", data.length);
[snakeSession sendData:data toPeers:snakePeers withDataMode:GKSendDataReliable error:nil];
// to retrieve
NSArray *intArray = [[[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding] componentsSeparatedByString:#"|"];
int snakeHead_position_x = [intArray[0] intValue];
int snakeHead_position_y = [intArray[1] intValue];
int direction_x = [intArray[2] intValue];
int direction_y = [intArray[3] intValue];
int bodyOffsetX = [intArray[4] intValue];
int bodyOffsetY = [intArray[5] intValue];
int amountBodies = [intArray[6] intValue];