3desencryption和解密在iOS

我正在进行3DESencryption和解密。 我已经成功完成了encryption。 解密，我使用这个代码，但没有得到确切的结果。 我的encryptionstring是“ CHc3TsfJgYs = ”，键是“ meristem ”。 请告诉我我做错了什么？

NSString *token = @"CHc3TsfJgYs="; NSString *key = @"meristem"; const void *vplainText; size_t plainTextBufferSize; plainTextBufferSize = [token length]; vplainText = (const void *) [token UTF8String]; CCCryptorStatus ccStatus; uint8_t *bufferPtr = NULL; size_t bufferPtrSize = 0; size_t movedBytes ; 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 *initVec = @"init Vec"; const void *vkey = (const void *) [key UTF8String]; const void *vinitVec = (const void *) [initVec UTF8String]; ccStatus = CCCrypt(kCCDecrypt, kCCAlgorithm3DES, kCCOptionPKCS7Padding | kCCOptionECBMode, vkey, //"123456789012345678901234", //key kCCKeySizeDES, NULL,// vinitVec, //"init Vec", //iv, vplainText, //"Your Name", //plainText, plainTextBufferSize, (void *)bufferPtr, bufferPtrSize, &movedBytes); NSString *result; NSData *myData = [NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes]; result = [myData base64Encoding]; // result = [myDat]; NSLog(@"dis is data %@",result); 

Answer 1

 ccStatus = CCCrypt(kCCDecrypt, kCCAlgorithm3DES, kCCOptionPKCS7Padding | kCCOptionECBMode, vkey, //"123456789012345678901234", //key kCCKeySize3DES, NULL,// vinitVec, //"init Vec", //iv, vplainText, //"Your Name", //plainText, plainTextBufferSize, (void *)bufferPtr, bufferPtrSize, &movedBytes); 

你需要改变kCCKeySizeDES – > kCCKeySize3DES