//AES加密解密
#import <CommonCrypto/CommonCrypto.h>
#import <CommonCrypto/CommonDigest.h>
//AES128位加密 base64编码 注:kCCKeySizeAES128点进去可以更换256位加密-(NSString *)AES128Encrypt:(NSString *)plainText key:(NSString *)key{ char keyPtr[kCCKeySizeAES128+1];// memset(keyPtr, 0, sizeof(keyPtr)); [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding]; NSData* data = [plainText dataUsingEncoding:NSUTF8StringEncoding]; NSUInteger dataLength = [data length]; size_t bufferSize = dataLength + kCCBlockSizeAES128; void *buffer = malloc(bufferSize); size_t numBytesEncrypted = 0; CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt, kCCAlgorithmAES128, kCCOptionPKCS7Padding|kCCOptionECBMode, keyPtr, kCCBlockSizeAES128, NULL, [data bytes], dataLength, buffer, bufferSize, &numBytesEncrypted); if (cryptStatus == kCCSuccess) { NSData *resultData = [NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted]; NSString *stringBase64 = [resultData base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithLineFeed]; // base64格式的字符串 return stringBase64; } free(buffer); return nil;}//解密-(NSString *)AES128Decrypt:(NSString *)encryptText key:(NSString *)key{ char keyPtr[kCCKeySizeAES128 + 1]; memset(keyPtr, 0, sizeof(keyPtr)); [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding]; NSData *data = [[NSData alloc] initWithBase64EncodedString:encryptText options:NSDataBase64DecodingIgnoreUnknownCharacters];//base64解码 NSUInteger dataLength = [data length]; size_t bufferSize = dataLength + kCCBlockSizeAES128; void *buffer = malloc(bufferSize); size_t numBytesCrypted = 0; CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt, kCCAlgorithmAES128, kCCOptionPKCS7Padding|kCCOptionECBMode, keyPtr, kCCBlockSizeAES128, NULL, [data bytes], dataLength, buffer, bufferSize, &numBytesCrypted); if (cryptStatus == kCCSuccess) { NSData *resultData = [NSData dataWithBytesNoCopy:buffer length:numBytesCrypted]; return [[NSString alloc] initWithData:resultData encoding:NSUTF8StringEncoding]; } free(buffer); return nil;}