#import <CommonCrypto/CommonCryptor.h>
#import "GTMBase64.h" // Open source,base64处理,就两个文件,自己从网上下载下吧 + (NSString*)TripleDES:(NSString*)plainText encryptOrDecrypt:(CCOperation)encryptOrDecrypt key:(NSString*)key { const void *vplainText; size_t plainTextBufferSize; if (encryptOrDecrypt == kCCDecrypt) { NSData *EncryptData = [GTMBase64 decodeData:[plainText dataUsingEncoding:NSUTF8StringEncoding]]; plainTextBufferSize = [EncryptData length]; vplainText = [EncryptData bytes]; } else { NSData* data = [plainText dataUsingEncoding:NSUTF8StringEncoding]; plainTextBufferSize = [data length]; vplainText = (const void *)[data bytes]; } CCCryptorStatus ccStatus; uint8_t *bufferPtr = NULL; size_t bufferPtrSize = 0; size_t movedBytes = 0; // uint8_t ivkCCBlockSize3DES; 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 *key = @"123456789012345678901234"; NSString *initVec = @"init Vec"; const void *vkey = (const void *) [key UTF8String]; const void *vinitVec = (const void *) [initVec UTF8String]; ccStatus = CCCrypt(encryptOrDecrypt, kCCAlgorithm3DES, kCCOptionPKCS7Padding, vkey, //"123456789012345678901234", //key kCCKeySize3DES, vinitVec, //"init Vec", //iv, vplainText, //"Your Name", //plainText, plainTextBufferSize, (void *)bufferPtr, bufferPtrSize, &movedBytes); //if (ccStatus == kCCSuccess) NSLog(@"SUCCESS"); /*else if (ccStatus == kCC ParamError) return @"PARAM ERROR"; else if (ccStatus == kCCBufferTooSmall) return @"BUFFER TOO SMALL"; else if (ccStatus == kCCMemoryFailure) return @"MEMORY FAILURE"; else if (ccStatus == kCCAlignmentError) return @"ALIGNMENT"; else if (ccStatus == kCCDecodeError) return @"DECODE ERROR"; else if (ccStatus == kCCUnimplemented) return @"UNIMPLEMENTED"; */ NSString *result; if (encryptOrDecrypt == kCCDecrypt) { result = [[[NSString alloc] initWithData:[NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes] encoding:NSUTF8StringEncoding] autorelease]; } else { NSData *myData = [NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes]; result = [GTMBase64 stringByEncodingData:myData]; } return result; } 调用示例代码 NSString* req = @"234234234234234中国"; NSString* key = @"888fdafdakfjak;"; NSString* ret1 = [NSString TripleDES:req encryptOrDecrypt:kCCEncrypt key:key]; NSLog(@"3DES/Base64 Encode Result=%@", ret1); NSString* ret2 = [NSString TripleDES:ret1 encryptOrDecrypt:kCCDecrypt key:key]; NSLog(@"3DES/Base64 Decode Result=%@", ret2); |
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