使用des cbc模式encryption/解密stringobj-c

嗨，大家好，我在obj-c世界很新，我想知道如何encryptiondes中的string？ 我已经试过search，但找不到任何示例代码，可以帮助我，我意识到有一个类commonCrypt做我想做的，但我不知道如何使用它

我的代码

NSString* key = @"abc43HU0"; NSString *token = @"hellohello"; 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 = NULL; 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 *) [key UTF8String]; ccStatus = CCCrypt(kCCEncrypt, kCCAlgorithmDES, kCCModeCBC, vkey, //"123456789012345678901234", //key kCCKeySizeDES, vinitVec,// 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; crypt_result.text = myData; 

Answer 1

这是工作代码：

 NSString* key = @"abc43HU0"; NSString *token = @"hellohello"; const void *vplainText; size_t plainTextBufferSize = [token length]; vplainText = (const void *) [token UTF8String]; CCCryptorStatus ccStatus; uint8_t *bufferPtr = NULL; size_t bufferPtrSize = 0; size_t movedBytes = 0; bufferPtrSize = (plainTextBufferSize + kCCBlockSizeDES) & ~(kCCBlockSizeDES - 1); bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t)); memset((void *)bufferPtr, 0x0, bufferPtrSize); Byte iv [] = {0x65, 0x110, 0x68, 0x26, 0x69, 0x178, 0x200, 0x219}; const void *vkey = (const void *) [key UTF8String]; ccStatus = CCCrypt(kCCEncrypt, kCCAlgorithmDES, kCCOptionPKCS7Padding, vkey, kCCKeySizeDES, iv, vplainText, plainTextBufferSize, (void *)bufferPtr, bufferPtrSize, &movedBytes); NSData *myData = [NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes]; NSString* result = [base64 base64EncodeData:myData];//my own method to encoding with base64 

Answer 2

试试kCCOptionPKCS7Padding | kCCModeCBC 用于ccOptions参数的kCCModeCBC。