話不多說济欢，直接上代碼
.h
import?
@interface?LanAES :?NSObject
+(NSData?*)AES256ParmEncryptWithKey:(NSString?*)key Encrypttext:(NSData?*)text;?//加密
+(NSData?*)AES256ParmDecryptWithKey:(NSString?*)key Decrypttext:(NSData?*)text;?//解密
+(NSString?*) aes256_encrypt:(NSString?*)key Encrypttext:(NSString?*)text;
+(NSString?*) aes256_decrypt:(NSString?*)key Decrypttext:(NSString?*)text;
@end
.m
#import?"LanAES.h"
#import?
@implementation?LanAES
+(NSData?*)AES256ParmEncryptWithKey:(NSString?*)key Encrypttext:(NSData?*)text?//加密
{
?char?keyPtr[kCCKeySizeAES256+1];
?bzero(keyPtr,?sizeof(keyPtr));
[key?getCString:keyPtr?maxLength:sizeof(keyPtr)?encoding:NSUTF8StringEncoding];
?NSUInteger?dataLength = [text?length];
?size_t?bufferSize = dataLength +?kCCBlockSizeAES128;
?void?*buffer =?malloc(bufferSize);
?size_t?numBytesEncrypted =?0;
?CCCryptorStatus?cryptStatus =?CCCrypt(kCCEncrypt,?kCCAlgorithmAES128,
?kCCOptionPKCS7Padding?|?kCCOptionECBMode,
keyPtr,?kCCBlockSizeAES128,
?NULL,
[text?bytes], dataLength,
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? buffer, bufferSize,
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? &numBytesEncrypted);
?if?(cryptStatus ==?kCCSuccess) {
?return?[NSData?dataWithBytesNoCopy:buffer?length:numBytesEncrypted];
? ? }
?free(buffer);
?return?nil;
}
+ (NSData?*)AES256ParmDecryptWithKey:(NSString?*)key Decrypttext:(NSData?*)text?//解密
{
?char?keyPtr[kCCKeySizeAES256+1];
?bzero(keyPtr,?sizeof(keyPtr));
[key?getCString:keyPtr?maxLength:sizeof(keyPtr)?encoding:NSUTF8StringEncoding];
?NSUInteger?dataLength = [text?length];
?size_t?bufferSize = dataLength +?kCCBlockSizeAES128;
?void?*buffer =?malloc(bufferSize);
?size_t?numBytesDecrypted =?0;
?CCCryptorStatus?cryptStatus =?CCCrypt(kCCDecrypt,?kCCAlgorithmAES128,
?kCCOptionPKCS7Padding?|?kCCOptionECBMode,
keyPtr,?kCCBlockSizeAES128,
?NULL,
[text?bytes], dataLength,
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? buffer, bufferSize,
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? &numBytesDecrypted);
?if?(cryptStatus ==?kCCSuccess) {
?return?[NSData?dataWithBytesNoCopy:buffer?length:numBytesDecrypted];
? ? }
?free(buffer);
?return?nil;
}
+(NSString?*) aes256_encrypt:(NSString?*)key Encrypttext:(NSString?*)text
{
?const?char?*cstr = [text?cStringUsingEncoding:NSUTF8StringEncoding];
?NSData?*data = [NSData?dataWithBytes:cstr?length:text.length];
?//對(duì)數(shù)據(jù)進(jìn)行加密
?NSData?*result = [LanAES?AES256ParmEncryptWithKey:key?Encrypttext:data];
?//轉(zhuǎn)換為2進(jìn)制字符串
?if?(result && result.length?>?0) {
?Byte?*datas = (Byte*)[result?bytes];
?NSMutableString?*output = [NSMutableString?stringWithCapacity:result.length?*?2];
?for(int?i =?0; i < result.length; i++){
[output?appendFormat:@"%02x", datas[i]];
? ? ? ? }
?return?output;
? ? }
?return?nil;
}
+(NSString?*) aes256_decrypt:(NSString?*)key Decrypttext:(NSString?*)text
{
?//轉(zhuǎn)換為2進(jìn)制Data
?NSMutableData?*data = [NSMutableData?dataWithCapacity:text.length?/?2];
?unsigned?char?whole_byte;
?char?byte_chars[3] = {'\0','\0','\0'};
?int?i;
?for?(i=0; i < [text?length] /?2; i++) {
byte_chars[0] = [text?characterAtIndex:i*2];
byte_chars[1] = [text?characterAtIndex:i*2+1];
whole_byte =?strtol(byte_chars,?NULL,?16);
[data?appendBytes:&whole_byte?length:1];
? ? }
?//對(duì)數(shù)據(jù)進(jìn)行解密
?NSData* result = [LanAES?AES256ParmDecryptWithKey:key?Decrypttext:data];
?if?(result && result.length?>?0) {
?return?[[NSString?alloc]?initWithData:result?encoding:NSUTF8StringEncoding];
? ? }
?return?nil;
}
