java C# objective-c AES对称加解密

OStack程序员社区-中国程序员成长平台 › 门户 › 编程› C语言›C语言教程

原作者: [db:作者] 来自: [db:来源] 收藏邀请

 1 /** 
 2  * AES加解密 
 3  */  
 4 public class AESHelper {  
 5     final static String AES_KEY = "43hr8fhu34b58123";  
 6   
 7     /** 
 8      * AES加密 
 9      *  
10      * @param text
11      * 待加密字符串 
12      * @return 加密后字符串 
13      */  
14     public static String AESEncrypt(String text) {  
15         try {  
16             String password = AES_KEY;  
17             SecretKeySpec skeySpec = new SecretKeySpec(password.getBytes(), "AES");  
18             Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");  
19             cipher.init(Cipher.ENCRYPT_MODE, skeySpec);  
20             String strTmp = Base64.encodeToString(cipher.doFinal(text.getBytes()), Base64.DEFAULT);  
21             return strTmp;  
22         } catch (Exception e) {  
23             e.printStackTrace();  
24         }  
25         return text;  
26     }  
27   
28     /** 
29      * AES解密 
30      *  
31      * @param text
32      * 待解密字符串 
33      * @return 解密后字符串 
34      */  
35     public static String aesDecrypt(String text) {  
36         try {  
37             String password = AES_KEY;  
38             SecretKeySpec skeySpec = new SecretKeySpec(password.getBytes(), "AES");  
39             Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");  
40             cipher.init(Cipher.DECRYPT_MODE, skeySpec);  
41             String strTmp = new String(cipher.doFinal(Base64.decode(text, Base64.DEFAULT)));  
42             return strTmp;  
43         } catch (Exception ex) {  
44             ex.printStackTrace();  
45         }  
46         return text;  
47     }  
48 }

Java

 1 public class AESHelper 
 2     {  
 3         const string AES_KEY = "43hr8fhu34b58123";  
 4   
 5         /// <summary>  
 6         /// AES加密  
 7         /// </summary>  
 8         /// <param name="Text">待加密字符串</param>  
 9         /// <returns>加密后字符串</returns>  
10         public static string AESEncrypt(string Text)  
11         {  
12             try  
13             {  
14                 string key = AES_KEY;  
15                 //分组加密算法  
16                 AesCryptoServiceProvider aes =new AesCryptoServiceProvider();  
17                 byte[] inputByteArray = Encoding.UTF8.GetBytes(Text);//得到需要加密的字节数组   
18                 //设置密钥及密钥向量  
19                 aes.Key = Encoding.UTF8.GetBytes(key);  
20                 //aes.IV = Encoding.UTF8.GetBytes(key);  
21                 aes.Mode = CipherMode.ECB;  
22                 aes.Padding = PaddingMode.PKCS7;  
23                 byte[] cipherBytes = null;  
24                 using (MemoryStream ms = new MemoryStream())  
25                 {  
26                     using (CryptoStream cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write))  
27                     {  
28                         cs.Write(inputByteArray, 0, inputByteArray.Length);  
29                         cs.FlushFinalBlock();  
30                         cipherBytes = ms.ToArray();//得到加密后的字节数组  
31                         cs.Close();  
32                         ms.Close();  
33                     }  
34                 }  
35                 return Convert.ToBase64String(cipherBytes);  
36             }  
37             catch { }  
38             return Text;  
39         }  
40   
41         /// <summary>  
42         /// AES解密  
43         /// </summary>  
44         /// <param name="Text">待解密字符串</param>  
45         /// <returns>解密后字符串</returns>  
46         public static string AESDecrypt(string Text)  
47         {  
48             try  
49             {  
50                 string key = AES_KEY;  
51                 byte[] cipherText = Convert.FromBase64String(Text);  
52                 AesCryptoServiceProvider aes = new AesCryptoServiceProvider();  
53                 aes.Key = Encoding.UTF8.GetBytes(key);  
54                 //aes.IV = Encoding.UTF8.GetBytes(key);  
55                 aes.Mode = CipherMode.ECB;  
56                 aes.Padding = PaddingMode.PKCS7;  
57                 byte[] decryptBytes = new byte[cipherText.Length];  
58                 using (MemoryStream ms = new MemoryStream(cipherText))  
59                 {  
60                     using (CryptoStream cs = new CryptoStream(ms, aes.CreateDecryptor(), CryptoStreamMode.Read))  
61                     {  
62                         cs.Read(decryptBytes, 0, decryptBytes.Length);  
63                         cs.Close();  
64                         ms.Close();  
65                     }  
66                 }  
67                 return Encoding.UTF8.GetString(decryptBytes).Replace("\0", "");   //将字符串后尾的'\0'去掉  
68             }  
69             catch { }  
70             return Text;  
71         }  
72     }

  1 /*
  2  *.h文件
  3  */
  4 #import <Foundation/Foundation.h>  
  5   
  6 @interface Security : NSObject  
  7 +(NSString*)AesEncrypt:(NSString*)str;  
  8 +(NSString*)AesDecrypt:(NSString*)str;  
  9 @end  
 10 
 11 --------------------------------------------------------------------------------
 12 
 13 /*
 14  *.m文件
 15  */
 16 #import "Security.h"  
 17 #import <CommonCrypto/CommonCryptor.h>  
 18 static const char encodingTable[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";  
 19 #define LocalStr_None @"" //空字符串  
 20   
 21 @implementation Security  
 22   
 23 /* 
 24  * AES加密 
 25  * 
 26  */  
 27 +(NSString*)AesEncrypt:(NSString*)str{  
 28     NSString *key=@"43hr8fhu34b58123"; // 密钥  
 29     NSData *data=[str dataUsingEncoding:NSUTF8StringEncoding]; // 待加密字符转为NSData型  
 30     char keyPtr[kCCKeySizeAES128 + 1];  
 31     memset(keyPtr, 0, sizeof(keyPtr));  
 32     [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];  
 33       
 34     NSUInteger dataLength = [data length];  
 35     size_t bufferSize = dataLength + kCCBlockSizeAES128;  
 36     voidvoid *buffer = malloc(bufferSize);  
 37       
 38     size_t numBytesCrypted = 0;  
 39     CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt,  
 40                                           kCCAlgorithmAES128,  
 41                                           kCCOptionPKCS7Padding|kCCOptionECBMode,  
 42                                           keyPtr,  
 43                                           kCCBlockSizeAES128,  
 44                                           nil,  
 45                                           [data bytes],  
 46                                           dataLength,  
 47                                           buffer,  
 48                                           bufferSize,  
 49                                           &numBytesCrypted);  
 50     if (cryptStatus == kCCSuccess) {  
 51         NSData *resultData=[NSData dataWithBytesNoCopy:buffer length:numBytesCrypted];  
 52         NSString *result =[self base64EncodedStringFrom:resultData];  
 53         return result;  
 54     }  
 55     free(buffer);  
 56     return str;  
 57 }  
 58   
 59 /* 
 60  * AES解密 
 61  * 
 62  */  
 63 +(NSString*)AesDecrypt:(NSString*)str{  
 64     NSString *key=@"Q*1_3@c!4kd^j&g%"; // 密钥  
 65     NSData *data=[self dataWithBase64EncodedString:str]; // base4解码  
 66     char keyPtr[kCCKeySizeAES128 + 1];  
 67     memset(keyPtr, 0, sizeof(keyPtr));  
 68     [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];  
 69       
 70     NSUInteger dataLength = [data length];  
 71     size_t bufferSize = dataLength + kCCBlockSizeAES128;  
 72     voidvoid *buffer = malloc(bufferSize);  
 73       
 74     size_t numBytesCrypted = 0;  
 75     CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt,  
 76                                           kCCAlgorithmAES128,  
 77                                           kCCOptionPKCS7Padding|kCCOptionECBMode,  
 78                                           keyPtr,  
 79                                           kCCBlockSizeAES128,  
 80                                           nil,  
 81                                           [data bytes],  
 82                                           dataLength,  
 83                                           buffer,  
 84                                           bufferSize,  
 85                                           &numBytesCrypted);  
 86     if (cryptStatus == kCCSuccess) {  
 87         NSData *resultData=[NSData dataWithBytesNoCopy:buffer length:numBytesCrypted];  
 88         NSString *result =[[NSString alloc]initWithData:resultData encoding:NSUTF8StringEncoding];  
 89         return result;  
 90     }  
 91     free(buffer);  
 92     return str;  
 93 }  
 94   
 95   
 96 + (NSString *)base64StringFromText:(NSString *)text  
 97 {  
 98     if (text && ![text isEqualToString:LocalStr_None]) {  
 99         NSData *data = [text dataUsingEncoding:NSUTF8StringEncoding];  
100         return [self base64EncodedStringFrom:data];  
101     }  
102     else {  
103         return LocalStr_None;  
104     }  
105 }  
106   
107 + (NSString *)textFromBase64String:(NSString *)base64  
108 {  
109     if (base64 && ![base64 isEqualToString:LocalStr_None]) {  
110         NSData *data = [self dataWithBase64EncodedString:base64];  
111         return [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];  
112     }  
113     else {  
114         return LocalStr_None;  
115     }  
116 }  
117   
118 + (NSData *)dataWithBase64EncodedString:(NSString *)string  
119 {  
120     if (string == nil)  
121         [NSException raise:NSInvalidArgumentException format:nil];  
122     if ([string length] == 0)  
123         return [NSData data];  
124       
125     static charchar *decodingTable = NULL;  
126     if (decodingTable == NULL)  
127     {  
128         decodingTable = malloc(256);  
129         if (decodingTable == NULL)  
130             return nil;  
131         memset(decodingTable, CHAR_MAX, 256);  
132         NSUInteger i;  
133         for (i = 0; i < 64; i++)  
134             decodingTable[(short)encodingTable[i]] = i;  
135     }  
136       
137     const charchar *characters = [string cStringUsingEncoding:NSASCIIStringEncoding];  
138     if (characters == NULL)     //  Not an ASCII string!  
139         return nil;  
140     charchar *bytes = malloc((([string length] + 3) / 4) * 3);  
141     if (bytes == NULL)  
142         return nil;  
143     NSUInteger length = 0;  
144       
145     NSUInteger i = 0;  
146     while (YES)  
147     {  
148         char buffer[4];  
149         short bufferLength;  
150         for (bufferLength = 0; bufferLength < 4; i++)  
151         {  
152             if (characters[i] == '\0')  
153                 break;  
154             if (isspace(characters[i]) || characters[i] == '=')  
155                 continue;  
156             buffer[bufferLength] = decodingTable[(short)characters[i]];  
157             if (buffer[bufferLength++] == CHAR_MAX)      //  Illegal character!  
158             {  
159                 free(bytes);  
160                 return nil;  
161             }  
162         }  
163           
164         if (bufferLength == 0)  
165             break;  
166         if (bufferLength == 1)      //  At least two characters are needed to produce one byte!  
167         {  
168             free(bytes);  
169             return nil;  
170         }  
171           
172         //  Decode the characters in the buffer to bytes.  
173         bytes[length++] = (buffer[0] << 2) | (buffer[1] >> 4);  
174         if (bufferLength > 2)  
175             bytes[length++] = (buffer[1] << 4) | (buffer[2] >> 2);  
176         if (bufferLength > 3)  
177             bytes[length++] = (buffer[2] << 6) | buffer[3];  
178     }  
179       
180     bytes = realloc(bytes, length);  
181     return [NSData dataWithBytesNoCopy:bytes length:length];  
182 }  
183   
184 + (NSString *)base64EncodedStringFrom:(NSData *)data  
185 {  
186     if ([data length] == 0)  
187         return @"";  
188       
189     charchar *characters = malloc((([data length] + 2) / 3) * 4);  
190     if (characters == NULL)  
191         return nil;  
192     NSUInteger length = 0;  
193       
194     NSUInteger i = 0;  
195     while (i < [data length])  
196     {  
197         char buffer[3] = {0,0,0};  
198         short bufferLength = 0;  
199         while (bufferLength < 3 && i < [data length])  
200             buffer[bufferLength++] = ((charchar *)[data bytes])[i++];  
201           
202         //  Encode the bytes in the buffer to four characters, including padding "=" characters if necessary.  
203         characters[length++] = encodingTable[(buffer[0] & 0xFC) >> 2];  
204         characters[length++] = encodingTable[((buffer[0] & 0x03) << 4) | ((buffer[1] & 0xF0) >> 4)];  
205         if (bufferLength > 1)  
206             characters[length++] = encodingTable[((buffer[1] & 0x0F) << 2) | ((buffer[2] & 0xC0) >> 6)];  
207         else characters[length++] = '=';  
208         if (bufferLength > 2)  
209             characters[length++] = encodingTable[buffer[2] & 0x3F];  
210         else characters[length++] = '=';  
211     }  
212       
213     return [[NSString alloc] initWithBytesNoCopy:characters length:length encoding:NSASCIIStringEncoding freeWhenDone:YES];  
214 }  
215   
216 @end