AES 加密 应该对大家有用
2016-05-11 18:35
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#import <CommonCrypto/CommonCryptor.h>
#import "GTMBase64.h"
#define gkey @"****" //这是 KEY值 大家自己改
#define gIv @"*****" //这是 KEY值 大家自己改
//@implementation AES_password
+(NSString *)AES128Encrypt:(NSString *)plainText
{
char keyPtr[kCCKeySizeAES128+1];
memset(keyPtr, 0, sizeof(keyPtr));
[gkey getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
char ivPtr[kCCBlockSizeAES128+1];
memset(ivPtr, 0, sizeof(ivPtr));
[gIv getCString:ivPtr maxLength:sizeof(ivPtr) encoding:NSUTF8StringEncoding];
NSData* data = [plainText dataUsingEncoding:NSUTF8StringEncoding];
NSUInteger dataLength = [data length];
int diff = kCCKeySizeAES128 - (dataLength % kCCKeySizeAES128);
int newSize = 0;
if(diff > 0)
{
newSize = dataLength + diff;
}
char dataPtr[newSize];
memcpy(dataPtr, [data bytes], [data length]);
for(int i = 0; i < diff; i++)
{
dataPtr[i + dataLength] = 0x00;
}
size_t bufferSize = newSize + kCCBlockSizeAES128;
void *buffer = malloc(bufferSize);
memset(buffer, 0, bufferSize);
size_t numBytesCrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt,
kCCAlgorithmAES128,
0x0000, //No padding
keyPtr,
kCCKeySizeAES128,
ivPtr,
dataPtr,
sizeof(dataPtr),
buffer,
bufferSize,
&numBytesCrypted);
if (cryptStatus == kCCSuccess) {
NSData *resultData = [NSData dataWithBytesNoCopy:buffer length:numBytesCrypted];
return [GTMBase64 stringByEncodingData:resultData];
}
free(buffer);
return nil;
}
+(NSString *)AES128Decrypt:(NSString *)encryptText
{
char keyPtr[kCCKeySizeAES128 + 1];
memset(keyPtr, 0, sizeof(keyPtr));
[gkey getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
char ivPtr[kCCBlockSizeAES128 + 1];
memset(ivPtr, 0, sizeof(ivPtr));
[gIv getCString:ivPtr maxLength:sizeof(ivPtr) encoding:NSUTF8StringEncoding];
NSData *data = [GTMBase64 decodeData:[encryptText dataUsingEncoding:NSUTF8StringEncoding]];
NSUInteger dataLength = [data length];
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void *buffer = malloc(bufferSize);
size_t numBytesCrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt,
kCCAlgorithmAES128,
0x0000,
keyPtr,
kCCBlockSizeAES128,
ivPtr,
[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;
}
#import "GTMBase64.h"
#define gkey @"****" //这是 KEY值 大家自己改
#define gIv @"*****" //这是 KEY值 大家自己改
//@implementation AES_password
+(NSString *)AES128Encrypt:(NSString *)plainText
{
char keyPtr[kCCKeySizeAES128+1];
memset(keyPtr, 0, sizeof(keyPtr));
[gkey getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
char ivPtr[kCCBlockSizeAES128+1];
memset(ivPtr, 0, sizeof(ivPtr));
[gIv getCString:ivPtr maxLength:sizeof(ivPtr) encoding:NSUTF8StringEncoding];
NSData* data = [plainText dataUsingEncoding:NSUTF8StringEncoding];
NSUInteger dataLength = [data length];
int diff = kCCKeySizeAES128 - (dataLength % kCCKeySizeAES128);
int newSize = 0;
if(diff > 0)
{
newSize = dataLength + diff;
}
char dataPtr[newSize];
memcpy(dataPtr, [data bytes], [data length]);
for(int i = 0; i < diff; i++)
{
dataPtr[i + dataLength] = 0x00;
}
size_t bufferSize = newSize + kCCBlockSizeAES128;
void *buffer = malloc(bufferSize);
memset(buffer, 0, bufferSize);
size_t numBytesCrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt,
kCCAlgorithmAES128,
0x0000, //No padding
keyPtr,
kCCKeySizeAES128,
ivPtr,
dataPtr,
sizeof(dataPtr),
buffer,
bufferSize,
&numBytesCrypted);
if (cryptStatus == kCCSuccess) {
NSData *resultData = [NSData dataWithBytesNoCopy:buffer length:numBytesCrypted];
return [GTMBase64 stringByEncodingData:resultData];
}
free(buffer);
return nil;
}
+(NSString *)AES128Decrypt:(NSString *)encryptText
{
char keyPtr[kCCKeySizeAES128 + 1];
memset(keyPtr, 0, sizeof(keyPtr));
[gkey getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
char ivPtr[kCCBlockSizeAES128 + 1];
memset(ivPtr, 0, sizeof(ivPtr));
[gIv getCString:ivPtr maxLength:sizeof(ivPtr) encoding:NSUTF8StringEncoding];
NSData *data = [GTMBase64 decodeData:[encryptText dataUsingEncoding:NSUTF8StringEncoding]];
NSUInteger dataLength = [data length];
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void *buffer = malloc(bufferSize);
size_t numBytesCrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt,
kCCAlgorithmAES128,
0x0000,
keyPtr,
kCCBlockSizeAES128,
ivPtr,
[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;
}
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