#import@interface CommonFunc : NSObject
//十六進制轉換和nsdata的轉換。
+ (NSString *)convertDataToHexStr:(NSData *)data;
+(NSData *)convertHexStrToData:(NSString *)str;
/*字符串加密
*參數
*plainText : 加密明文
*key? ? ? ? : 密鑰 64位
*/
//加密方法encryptUseDES:key:如下
+(NSString *) encryptUseDES:(NSString *)plainText key:(NSString*)key;
//解密方法decryptUseDES:key:如下
+(NSString*) decryptUseDES:(NSString*)cipherText key:(NSString*)key;
@end
#import "CommonFunc.h"http:// base 加密//#import#import#include@implementation CommonFunc
static Byte iv[8]={1,2,3,4,5,6,7,8};
//加密方法encryptUseDES:key:如下
+(NSString *) encryptUseDES:(NSString *)plainText key:(NSString*)key
{
NSString *ciphertext =nil;
NSData* data=[plainText dataUsingEncoding: NSUTF8StringEncoding];
//? ? NSLog(@"plainTextBytes with UTF-8 encoding:%@",[XYDESdataToHex:data]);
NSUInteger bufferSize=([data length] + kCCKeySizeDES) & ~(kCCKeySizeDES -1);
char buffer[bufferSize];
memset(buffer, 0,sizeof(buffer));
size_t bufferNumBytes;
CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt,
kCCAlgorithmDES,
kCCOptionPKCS7Padding,
[key UTF8String],
kCCKeySizeDES,
iv? ,
[data bytes],
[data length],
buffer,
bufferSize,
&bufferNumBytes);
if (cryptStatus ==kCCSuccess) {
NSData *data = [NSData dataWithBytes:buffer length:(NSUInteger)bufferNumBytes];
//? ? ? ? NSLog(@"objccipherTextBytes:%@",[XYDES dataToHex:data]);
NSLog(@"JavacipherTextBytes:%@",@"D72EA24833C4731FE9960B48DB705E7AF99AB772C6E6E19CE8F3F8EA16EE5297");
// base 加密
//? ? ? ? ciphertext = [GTMBase64 stringByEncodingData:data];
ciphertext =[self convertDataToHexStr: data];
NSLog(@"objccipherTextBase64:%@",ciphertext);
NSLog(@"JavacipherTextBase64:%@",@"1y6iSDPEcx/plgtI23Beevmat3LG5uGc6PP46hbuUpc=");
}
return ciphertext;
}
+ (NSString *)convertDataToHexStr:(NSData *)data {
if (!data || [data length] == 0) {
return @"";
}
NSMutableString *string = [[NSMutableString alloc] initWithCapacity:[data length]];
[data enumerateByteRangesUsingBlock:^(const void *bytes, NSRange byteRange, BOOL *stop) {
unsigned char *dataBytes = (unsigned char*)bytes;
for (NSInteger i = 0; i < byteRange.length; i++) {
NSString *hexStr = [NSString stringWithFormat:@"%x", (dataBytes[i]) & 0xff];
if ([hexStr length] == 2) {
[string appendString:hexStr];
} else {
[string appendFormat:@"0%@", hexStr];
}
}
}];
return string;
}
+(NSData *)convertHexStrToData:(NSString *)str {
if (!str || [str length] == 0) {
return nil;
}
NSMutableData *hexData = [[NSMutableData alloc] initWithCapacity:8];
NSRange range;
if ([str length] % 2 == 0) {
range = NSMakeRange(0, 2);
} else {
range = NSMakeRange(0, 1);
}
for (NSInteger i = range.location; i < [str length]; i += 2) {
unsigned int anInt;
NSString *hexCharStr = [str substringWithRange:range];
NSScanner *scanner = [[NSScanner alloc] initWithString:hexCharStr];
[scanner scanHexInt:&anInt];
NSData *entity = [[NSData alloc] initWithBytes:&anInt length:1];
[hexData appendData:entity];
range.location += range.length;
range.length = 2;
}
return hexData;
}
//解密方法decryptUseDES:key:如下
+(NSString*) decryptUseDES:(NSString*)cipherText key:(NSString*)key
{
// base 加密
//? ? NSData* data = [GTMBase64 decodeString:cipherText];
NSData *data =[self convertHexStrToData:cipherText];
NSUInteger bufferSize=([data length] + kCCKeySizeDES) & ~(kCCKeySizeDES -1);
char buffer[bufferSize];
memset(buffer, 0,sizeof(buffer));
size_t bufferNumBytes;
CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt,
kCCAlgorithmDES,
kCCOptionPKCS7Padding,
[key UTF8String],
kCCKeySizeDES,
iv,
[data bytes],
[data length],
buffer,
bufferSize,
&bufferNumBytes);
NSString* plainText = nil;
if (cryptStatus ==kCCSuccess) {
NSData *plainData =[NSData dataWithBytes:buffer length:(NSUInteger)bufferNumBytes];
//? ? ? ? NSLog(@"plainTextBytes:%@",[XYDES dataToHex:plainData]);
plainText = [[NSString alloc] initWithData:plainData encoding:NSUTF8StringEncoding];
}
return plainText;
}
