iOS下 AES128加密算法

因为蓝牙4.0芯片自带AES128加密算法所以 只要涉及到蓝牙开发都会使用

加密方法

+(NSMutableData*)AES_NEW_AESEn:(NSMutableData*)plain pass:(NSMutableData*)key

{

// NSLog(@"key是%@",key);

charkeyPtr[kCCKeySizeAES128+1];

memset(keyPtr,0,sizeof(keyPtr));

[keygetBytes:keyPtrlength:sizeof(keyPtr)];

//NSLog(@"加密的KEY是%s",keyPtr);

NSData* data = [[NSDataalloc]initWithData:plain];

NSUIntegerdataLength = [datalength];

size_tbufferSize = dataLength +kCCBlockSizeAES128;

void*buffer =malloc(bufferSize);

size_tnumBytesEncrypted =0;

CCCryptorStatuscryptStatus =CCCrypt(kCCEncrypt,

kCCAlgorithmAES128,

kCCOptionPKCS7Padding|kCCOptionECBMode,

keyPtr,

kCCBlockSizeAES128,

NULL,

[databytes],

dataLength,

buffer,

bufferSize,

&numBytesEncrypted);

if(cryptStatus ==kCCSuccess) {

NSMutableData*resultData = [NSMutableDatadataWithBytes:bufferlength:numBytesEncrypted];

returnresultData;

}

free(buffer);

returnnil;

}

解密方法

+(NSMutableData*)AES_NEW_AESDecrypt:(NSMutableData*)encryptText password:(NSMutableData*)key

{

charkeyPtr[kCCKeySizeAES128+1];

memset(keyPtr,0,sizeof(keyPtr));

[keygetBytes:keyPtrlength:sizeof(keyPtr)];

NSData*data=[[NSDataalloc]initWithData:encryptText];

NSUIntegerdataLength = [datalength];

size_tbufferSize = dataLength +kCCBlockSizeAES128;

void*buffer =malloc(bufferSize);

size_tnumBytesCrypted =0;

CCCryptorStatuscryptStatus =CCCrypt(kCCDecrypt,

kCCAlgorithmAES128,

kCCOptionECBMode,

keyPtr,

kCCBlockSizeAES128,

NULL,

[databytes],

dataLength,

buffer,

bufferSize,

&numBytesCrypted);

if(cryptStatus ==kCCSuccess) {

NSMutableData*resultData = [NSMutableDatadataWithBytesNoCopy:bufferlength:numBytesCrypted];

returnresultData;

}

free(buffer);

returnnil;

}

解密的时候没带  kCCOptionPKCS7Padding 如果发现需要就加上