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iOS  DES加密

1.首先引入头文件

#import "GTMBase64.h"

#import <CommonCrypto/CommonCryptor.h>

2.DES分为加密和解密

//密钥

#define gkey            @"123abc@1234"

//偏移量

#define gIv            @"01234567"

加密方法

#pragma mark - 加密方法

+ (NSString*)encrypt:(NSString*)plainText {

NSData* data = [plainText dataUsingEncoding:NSUTF8StringEncoding];

size_t plainTextBufferSize = [data length];

const void *vplainText = (const void *)[data bytes];

CCCryptorStatus ccStatus;

uint8_t *bufferPtr = NULL;

size_t bufferPtrSize = 0;

size_t movedBytes = 0;

bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1);

bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t));

memset((void *)bufferPtr, 0x0, bufferPtrSize);

const void *vkey = (const void *) [gkey UTF8String];

const void *vinitVec = (const void *) [gIv UTF8String];

ccStatus = CCCrypt(kCCEncrypt,

kCCAlgorithm3DES,

kCCOptionPKCS7Padding,

vkey,

kCCKeySize3DES,

vinitVec,

vplainText,

plainTextBufferSize,

(void *)bufferPtr,

bufferPtrSize,

&movedBytes);

NSData *myData = [NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes];

NSString *result = [GTMBase64 stringByEncodingData:myData];

return result;

}