AES加密ECB模式PKCS5Padding模式的实现

具体代码如下：

//字符串加密(16进制)

+ (NSString*)encyptPKCS5:(NSString*)plainText WithKey:(NSString*)key{

//把string转NSData

NSData* data = [plainText dataUsingEncoding:NSUTF8StringEncoding];

//length

size_tplainTextBufferSize = [data length];

constvoid*vplainText = (constvoid*)[databytes];

uint8_t*bufferPtr =NULL;

size_tbufferPtrSize =0;

size_tmovedBytes =0;

bufferPtrSize = (plainTextBufferSize +kCCBlockSizeAES128) & ~(kCCBlockSizeAES128-1);

bufferPtr =malloc( bufferPtrSize *sizeof(uint8_t));

memset((void*)bufferPtr,0x0, bufferPtrSize);

constvoid*vkey = (constvoid*) [keyUTF8String];

//配置CCCrypt

CCCryptorStatusccStatus =CCCrypt(kCCEncrypt,

kCCAlgorithmAES128,//3DES

kCCOptionECBMode|kCCOptionPKCS7Padding,//设置模式

vkey,//key

kCCKeySizeAES128,

nil,//偏移量，这里不用，设置为nil;不用的话，必须为nil,不可以为@“”

vplainText,

plainTextBufferSize,

(void*)bufferPtr,

bufferPtrSize,

&movedBytes);

if(ccStatus ==kCCSuccess) {

NSData*myData = [NSDatadataWithBytes:(constchar*)bufferPtr length:(NSUInteger)movedBytes];

NSUInteger len = [myData length];

char*chars = (char*)[myDatabytes];

NSMutableString*hexString = [[NSMutableString alloc]init];

for(NSUInteger i =0; i < len; i++ )

[hexString appendString:[NSString stringWithFormat:@"%0.2hhx", chars[i]]];

//16进制

return hexString;

}

free(bufferPtr);

return nil;

}