iOS常用加密方法(aes、md5、base64)
2015-08-24 22:15
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iOS常用加密方法(aes、md5、base64)
NSData+AES.h文件
[plain] view plaincopy
//
// NSData-AES.h
// Smile
//
// Created by 周 敏 on 12-11-24.
// Copyright (c) 2012年 BOX. All rights reserved.
//
#import
@class NSString;
@interface NSData (Encryption)
- (NSData *)AES256EncryptWithKey:(NSString *)key; //加密
- (NSData *)AES256DecryptWithKey:(NSString *)key; //解密
@end
NSData+AES.m文件
[plain] view plaincopy
//
// NSData-AES.h
// Smile
//
// Created by 周 敏 on 12-11-24.
// Copyright (c) 2012年 BOX. All rights reserved.
//
#import "NSData+AES.h"
#import
@implementation NSData (Encryption)
- (NSData *)AES256EncryptWithKey:(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;
void *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 *)AES256DecryptWithKey:(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;
void *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;
}
@end
这里AES在iOS加过密以后以nsdata的形式存下来,如果想以nsstring形式存储,那么对nsdata进行base64位编码。
首先下载GTMBase64文件,在工程中加入三个文件
GTMDefines.h
GTMBase64.h
GTMBase64.m
你可以在这里找到这三个文件
http://code.google.com/p/google-toolbox-for-mac/source/browse/trunk/Foundation/?r=87
你也可以在下面的demo里面找到这3个文件,demo会完整实现文章里面常用的3种编码方法。
我在此稍微封装一下:
.h文件
[plain] view plaincopy
#pragma mark - base64
+ (NSString*)encodeBase64String:(NSString *)input;
+ (NSString*)decodeBase64String:(NSString *)input;
+ (NSString*)encodeBase64Data:(NSData *)data;
+ (NSString*)decodeBase64Data:(NSData *)data;
.m文件
[plain] view plaincopy
#pragma mark - base64
+ (NSString*)encodeBase64String:(NSString * )input {
NSData *data = [input dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
data = [GTMBase64 encodeData:data];
NSString *base64String = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease];
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] autorelease];
return base64String;
}
+ (NSString*)encodeBase64Data:(NSData *)data {
data = [GTMBase64 encodeData:data];
NSString *base64String = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease];
return base64String;
}
+ (NSString*)decodeBase64Data:(NSData *)data {
data = [GTMBase64 decodeData:data];
NSString *base64String = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease];
return base64String;
}
[plain] view plaincopy
//
// NSString+MD5Encrypt.h
// Smile
//
// Created by 周 敏 on 12-11-24.
// Copyright (c) 2012年 BOX. All rights reserved.
//
#import
@interface NSString (MD5)
- (NSString *)md5Encrypt;
@end
NSString+MD5.m文件
[plain] view plaincopy
//
// NSString+MD5Encrypt.h
// Smile
//
// Created by 周 敏 on 12-11-24.
// Copyright (c) 2012年 BOX. All rights reserved.
//
#import "NSString+MD5.h"
@implementation NSString (MD5)
- (NSString *)md5Encrypt {
const char *original_str = [self UTF8String];
unsigned char result[CC_MD5_DIGEST_LENGTH];
CC_MD5(original_str, strlen(original_str), result);
NSMutableString *hash = [NSMutableString string];
for (int i = 0; i < 16; i++)
[hash appendFormat:@"X", result[i]];
return [hash lowercaseString];
}
@end
将字符串进行MD5加密,返回加密后的字符串。
#import <CommonCrypto/CommonDigest.h> // Need to import for CC_MD5 access
- (NSString *)md5:(NSString *)str
{
const char *cStr = [str UTF8String];
unsigned char result[16];
CC_MD5(cStr, strlen(cStr), result); // This is the md5 call
return [NSString stringWithFormat:
@"xxxxxxxxxxxxxxxx",
result[0], result[1], result[2], result[3],
result[4], result[5], result[6], result[7],
result[8], result[9], result[10], result[11],
result[12], result[13], result[14], result[15]
];
}
demo含有这3种的使用方式,在AppDelegate.m文件里面,不会使用的自己参考一下。
demo下载:http://download.csdn.net/detail/z251257144/4884004 http://blog.csdn.net/hsyj_0001/article/details/7607963
转自:http://blog.sina.com.cn/s/blog_a573f7990101b6gi.html
1、AES加密
NSData+AES.h文件[plain] view plaincopy
//
// NSData-AES.h
// Smile
//
// Created by 周 敏 on 12-11-24.
// Copyright (c) 2012年 BOX. All rights reserved.
//
#import
@class NSString;
@interface NSData (Encryption)
- (NSData *)AES256EncryptWithKey:(NSString *)key; //加密
- (NSData *)AES256DecryptWithKey:(NSString *)key; //解密
@end
NSData+AES.m文件
[plain] view plaincopy
//
// NSData-AES.h
// Smile
//
// Created by 周 敏 on 12-11-24.
// Copyright (c) 2012年 BOX. All rights reserved.
//
#import "NSData+AES.h"
#import
@implementation NSData (Encryption)
- (NSData *)AES256EncryptWithKey:(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;
void *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 *)AES256DecryptWithKey:(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;
void *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;
}
@end
这里AES在iOS加过密以后以nsdata的形式存下来,如果想以nsstring形式存储,那么对nsdata进行base64位编码。
2、BASE64编码
首先下载GTMBase64文件,在工程中加入三个文件GTMDefines.h
GTMBase64.h
GTMBase64.m
你可以在这里找到这三个文件
http://code.google.com/p/google-toolbox-for-mac/source/browse/trunk/Foundation/?r=87
你也可以在下面的demo里面找到这3个文件,demo会完整实现文章里面常用的3种编码方法。
我在此稍微封装一下:
.h文件
[plain] view plaincopy
#pragma mark - base64
+ (NSString*)encodeBase64String:(NSString *)input;
+ (NSString*)decodeBase64String:(NSString *)input;
+ (NSString*)encodeBase64Data:(NSData *)data;
+ (NSString*)decodeBase64Data:(NSData *)data;
.m文件
[plain] view plaincopy
#pragma mark - base64
+ (NSString*)encodeBase64String:(NSString * )input {
NSData *data = [input dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
data = [GTMBase64 encodeData:data];
NSString *base64String = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease];
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] autorelease];
return base64String;
}
+ (NSString*)encodeBase64Data:(NSData *)data {
data = [GTMBase64 encodeData:data];
NSString *base64String = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease];
return base64String;
}
+ (NSString*)decodeBase64Data:(NSData *)data {
data = [GTMBase64 decodeData:data];
NSString *base64String = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease];
return base64String;
}
3、MD5加密
NSString+MD5.h文件[plain] view plaincopy
//
// NSString+MD5Encrypt.h
// Smile
//
// Created by 周 敏 on 12-11-24.
// Copyright (c) 2012年 BOX. All rights reserved.
//
#import
@interface NSString (MD5)
- (NSString *)md5Encrypt;
@end
NSString+MD5.m文件
[plain] view plaincopy
//
// NSString+MD5Encrypt.h
// Smile
//
// Created by 周 敏 on 12-11-24.
// Copyright (c) 2012年 BOX. All rights reserved.
//
#import "NSString+MD5.h"
@implementation NSString (MD5)
- (NSString *)md5Encrypt {
const char *original_str = [self UTF8String];
unsigned char result[CC_MD5_DIGEST_LENGTH];
CC_MD5(original_str, strlen(original_str), result);
NSMutableString *hash = [NSMutableString string];
for (int i = 0; i < 16; i++)
[hash appendFormat:@"X", result[i]];
return [hash lowercaseString];
}
@end
将字符串进行MD5加密,返回加密后的字符串。
#import <CommonCrypto/CommonDigest.h> // Need to import for CC_MD5 access
- (NSString *)md5:(NSString *)str
{
const char *cStr = [str UTF8String];
unsigned char result[16];
CC_MD5(cStr, strlen(cStr), result); // This is the md5 call
return [NSString stringWithFormat:
@"xxxxxxxxxxxxxxxx",
result[0], result[1], result[2], result[3],
result[4], result[5], result[6], result[7],
result[8], result[9], result[10], result[11],
result[12], result[13], result[14], result[15]
];
}
demo含有这3种的使用方式,在AppDelegate.m文件里面,不会使用的自己参考一下。
demo下载:http://download.csdn.net/detail/z251257144/4884004 http://blog.csdn.net/hsyj_0001/article/details/7607963
转自:http://blog.sina.com.cn/s/blog_a573f7990101b6gi.html
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