1MD5

創建MD5類

#import 

@interface CJMD5 : NSObject
+(NSString *)md5HexDigest:(NSString *)input;
@end

#import CJMD5.h
#import 

@implementation CJMD5
+(NSString *)md5HexDigest:(NSString *)input{
    
    const char* str = [input UTF8String];
    unsigned char result[CC_MD5_DIGEST_LENGTH];
    CC_MD5(str, strlen(str), result);
    NSMutableString *ret = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH];
    
    for(int i = 0; i

MD5是不可逆的只有加密沒有解密使用方式如下
 
 
NSString *userName = @cerastes;
NSString *password = @hello Word;
//   MD5加密
NSString *md5 = [CJMD5 md5HexDigest:password];
NSLog(@%@,md5);


2AES加密
 
AES加密開源代碼git下載地址
https://github.com/Gurpartap/AESCrypt-ObjC
使用方法
 
//  AES加密
    NSString *encryptedData = [AESCrypt encrypt:userName password:password];//加密
    NSString *message = [AESCrypt decrypt:encryptedData password:password]; //解密
    NSLog(@加密結果 = %@,encryptedData);
    NSLog(@解密結果 = %@,message);


3 BASE64加密
 
下載地址 https://code.google.com/p/google-toolbox-for-mac/source/browse/trunk/Foundation/?r=87
添加如下方法
.h
 
+ (NSString*)encodeBase64String:(NSString *)input;
+ (NSString*)decodeBase64String:(NSString *)input;
+ (NSString*)encodeBase64Data:(NSData *)data;
+ (NSString*)decodeBase64Data:(NSData *)data;


.m
 
 
+ (NSString*)encodeBase64String:(NSString * )input {
    NSData *data = [input dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
    data = [GTMBase64 encodeData:data];
    NSString *base64String = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    return base64String;
}

+ (NSString*)decodeBase64String:(NSString * )input {
    NSData *data = [input dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
    data = [GTMBase64 decodeData:data];
    NSString *base64String = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    return base64String;
}

+ (NSString*)encodeBase64Data:(NSData *)data {
    data = [GTMBase64 encodeData:data];
    NSString *base64String = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    return base64String;
}

+ (NSString*)decodeBase64Data:(NSData *)data {
    data = [GTMBase64 decodeData:data];
    NSString *base64String = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    return base64String;
}



使用方法
 
 
//    BASE64加密
    NSString *baseEncodeString = [GTMBase64 encodeBase64String:password];
    NSString *baseDecodeString = [GTMBase64 decodeBase64String:baseEncodeString];
    NSLog(@baseEncodeString = %@,baseEncodeString);
    NSLog(@baseDecodeString = %@,baseDecodeString);