iOS系统方法进行AES对称加密

2019-11-09 14:02:29

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废话不多说，直接上代码：

头文件：

[objc] view plain copy PRint?

#import <Foundation/Foundation.h> @class NSString; @interface NSData (Encryption) - (NSData *)AES256ParmEncryptWithKey:(NSString *)key; //加密 - (NSData *)AES256ParmDecryptWithKey:(NSString *)key; //解密 @end

.m实现文件：

[objc] view%20plain copy print?

#import "Encryption.h" #import <CommonCrypto/CommonCryptor.h> @implementation NSData (Encryption) - (NSData *)AES256ParmEncryptWithKey:(NSString *)key //加密 { char keyPtr[kCCKeySizeAES256+1]; bzero(keyPtr, sizeof(keyPtr)); [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding]; NSUInteger dataLength = [self length]; size_t bufferSize = dataLength + kCCBlockSizeAES128; voidvoid *buffer = malloc(bufferSize); size_t numBytesEncrypted = 0; CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt, kCCAlgorithmAES128, kCCOptionPKCS7Padding | kCCOptionECBMode, keyPtr, kCCBlockSizeAES128, NULL, [self bytes], dataLength, buffer, bufferSize, &numBytesEncrypted); if (cryptStatus == kCCSuccess) { return [NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted]; } free(buffer); return nil; } - (NSData *)AES256ParmDecryptWithKey:(NSString *)key //解密 { char keyPtr[kCCKeySizeAES256+1]; bzero(keyPtr, sizeof(keyPtr)); [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding]; NSUInteger dataLength = [self length]; size_t bufferSize = dataLength + kCCBlockSizeAES128; voidvoid *buffer = malloc(bufferSize); size_t numBytesDecrypted = 0; CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt, kCCAlgorithmAES128, kCCOptionPKCS7Padding | kCCOptionECBMode, keyPtr, kCCBlockSizeAES128, NULL, [self bytes], dataLength, buffer, bufferSize, &numBytesDecrypted); if (cryptStatus == kCCSuccess) { return [NSData dataWithBytesNoCopy:buffer length:numBytesDecrypted]; } free(buffer); return nil; }

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