Objective-c 암호화관련

//1. MD5 해쉬

-(NSString*) md5:(NSString*)srcStr

{

const char *cStr = [srcStr UTF8String];

unsigned char result[CC_MD5_DIGEST_LENGTH];

CC_MD5(cStr, strlen(cStr), result);

return [NSString stringWithFormat:

@"%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",

result[0],result[1],result[2],result[3],result[4],result[5],result[6],result[7],

result[8],result[9],result[10],result[11],result[12],result[13],result[14],result[15]];

}

//2. Base64 Encoding

-(NSString*) base64:(NSString*)srcStr

{

NSLog(@"Original string: %@", srcStr);  

NSData *sourceData = [srcStr dataUsingEncoding:NSUTF8StringEncoding];  

NSString *base64EncodedString = [sourceData base64Encoding];  

NSLog(@"Encoded form: %@", base64EncodedString);

return base64EncodedString;

}

//3. Hex encoding

-(NSString *) hexEncode:(NSData*)data

{

    NSMutableString *hex = [NSMutableString string];

    unsigned char *bytes = (unsigned char *)[data bytes];

    char temp[3];

    NSUInteger i = 0;

    

    for (i = 0; i < [data length]; i++) 

{

temp[0] = temp[1] = temp[2] = 0;

(void)sprintf(temp, "%02x", bytes[i]);

[hex appendString:[NSString stringWithUTF8String:temp]];

}

    return hex;

}

//4. DES Encryption - ECB 모드 

-(NSData *) desEncrypt:(NSString*)srcStr

{

NSString *token = @"moauth1026336512"; 

NSString *key = @"DmsCksDk"; 

NSData *keyData   = [key dataUsingEncoding:NSUTF8StringEncoding];

NSData *plainData = [token dataUsingEncoding:NSUTF8StringEncoding]; 

NSMutableData *encData = [NSMutableData dataWithLength: plainData.length + 256];

size_t bytesWritten = 0;

CCCryptorStatus ccStatus;

ccStatus = CCCrypt(kCCEncrypt, 

   kCCAlgorithmDES, 

   /*kCCOptionPKCS7Padding|*/kCCOptionECBMode, 

   [keyData bytes],   //[IN]key 

   kCCKeySizeDES,     //[IN]key length 

   NULL,              //[IN]iv, 

   [plainData bytes], //[IN]plainText 

   [plainData length],//[IN]plainText length 

   encData.mutableBytes, //[OUT]encryptText

   encData.length,       //[OUT]encryptText  

   &bytesWritten);       //

encData.length = bytesWritten;

return encData;

}

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