[問題] 關於3des加解密問題

看板MacDev作者dm33時間13年前 (2012/07/10 15:18)推噓2(2推 0噓 5→)

留言7則, 2人參與討論串1/2 (看更多)

有點鬱悶，改了一3des-ecb加解密，結果加解密每次執行結果會不一樣有時候加解密就對了，有時候就錯了，是原本就為如此，還是我哪兒有問題呢，有誰知道嗎？以下程式碼.... +(NSData *) TriDesEncode:(NSData*)data key:(NSData*)key encryptOrDecrypt:(CCOperation)encryptOrDecrypt { NSLog(@"Data:%@",data); NSLog(@"key:%@",key); const void *vplainText = [data bytes]; size_t plainTextBufferSize = [data length]; 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 *) [key bytes]; ccStatus = CCCrypt(encryptOrDecrypt, kCCAlgorithm3DES, kCCOptionECBMode, vkey, //"123456789012345678901234", //key kCCKeySize3DES, nil, //"init Vec", //iv, vplainText, //"Your Name", //plainText, plainTextBufferSize, (void *)bufferPtr, bufferPtrSize, &movedBytes); NSData *result = [NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes]; return result; } -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 42.67.175.14

推

aecho

07/10 20:58, , 1^F

07/10 20:58, 1^F

→

aecho

07/10 20:59, , 2^F

07/10 20:59, 2^F

→

dm33

07/11 09:56, , 3^F

07/11 09:56, 3^F