AES加密在IOS中的使用

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現在做的App,因為考慮到安全性，所以用到了AES加密，以及配對安卓使用的AES加密。

.h檔案

#import <Foundation/Foundation.h>#import <CommonCrypto/CommonCryptor.h>#import <CommonCrypto/CommonKeyDerivation.h>#define AES_KEY @"[email protected]!*&y.)x#[;>"#define AES_IV @"0102030405060708"@interface NSData (AES)+ (NSString *) AESEncryptWithData:(NSData *) data;+ (NSData *) AESDecryptWithText:(NSString *) text;

.m檔案

#import "NSData+AES.h"@implementation NSData (AES)static const char encodingTable[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";+ (NSString *) AESEncryptWithData:(NSData *)data{    // ‘key‘ should be 32 bytes for AES256, will be null-padded otherwise    char keyPtr[kCCKeySizeAES256+1]; // room for terminator (unused)    bzero(keyPtr, sizeof(keyPtr)); // fill with zeroes (for padding)        NSUInteger dataLength = [data length];        size_t bufferSize = dataLength + kCCBlockSizeAES128;    void *buffer = malloc(bufferSize);    bzero(buffer, sizeof(buffer));        size_t numBytesEncrypted = 0;        CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt, kCCAlgorithmAES128,kCCOptionPKCS7Padding,                                          [[AES_KEY dataUsingEncoding:NSUTF8StringEncoding] bytes], kCCKeySizeAES128,                                          [[AES_IV dataUsingEncoding:NSUTF8StringEncoding] bytes] /* initialization vector (optional) */,                                          [data bytes], dataLength, /* input */                                          buffer, bufferSize, /* output */                                          &numBytesEncrypted);    if (cryptStatus == kCCSuccess) {        NSData *encryptData = [NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted];        return [encryptData base64Encoding2];            }        free(buffer); //free the buffer;    return nil;}+ (NSData *)AESDecryptWithText:(NSString *)text{    NSData *cipherData = [NSData dataWithBase64EncodedString:text];    // ‘key‘ should be 32 bytes for AES256, will be null-padded otherwise    char keyPtr[kCCKeySizeAES256+1]; // room for terminator (unused)    bzero(keyPtr, sizeof(keyPtr)); // fill with zeroes (for padding)        NSUInteger dataLength = [cipherData length];        size_t bufferSize = dataLength + kCCBlockSizeAES128;    void *buffer = malloc(bufferSize);        size_t numBytesDecrypted = 0;    CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt, kCCAlgorithmAES128, kCCOptionPKCS7Padding,                                          [[AES_KEY dataUsingEncoding:NSUTF8StringEncoding] bytes], kCCKeySizeAES128,                                          [[AES_IV dataUsingEncoding:NSUTF8StringEncoding] bytes] ,/* initialization vector (optional) */                                          [cipherData bytes], dataLength, /* input */                                          buffer, bufferSize, /* output */                                          &numBytesDecrypted);        if (cryptStatus == kCCSuccess) {        return [NSData dataWithBytesNoCopy:buffer length:numBytesDecrypted];    }        free(buffer); //free the buffer;    return nil;}+ (id)dataWithBase64EncodedString:(NSString *)string;{    if (string == nil)        [NSException raise:NSInvalidArgumentException format:nil];    if ([string length] == 0)        return [NSData data];        static char *decodingTable = NULL;    if (decodingTable == NULL)    {        decodingTable = malloc(256);        if (decodingTable == NULL)            return nil;        memset(decodingTable, CHAR_MAX, 256);        NSUInteger i;        for (i = 0; i < 64; i++)            decodingTable[(short)encodingTable[i]] = i;    }        const char *characters = [string cStringUsingEncoding:NSASCIIStringEncoding];    if (characters == NULL)     //  Not an ASCII string!        return nil;    char *bytes = malloc((([string length] + 3) / 4) * 3);    if (bytes == NULL)        return nil;    NSUInteger length = 0;        NSUInteger i = 0;    while (YES)    {        char buffer[4];        short bufferLength;        for (bufferLength = 0; bufferLength < 4; i++)        {            if (characters[i] == ‘\0‘)                break;            if (isspace(characters[i]) || characters[i] == ‘=‘)                continue;            buffer[bufferLength] = decodingTable[(short)characters[i]];            if (buffer[bufferLength++] == CHAR_MAX)      //  Illegal character!            {                free(bytes);                return nil;            }        }                if (bufferLength == 0)            break;        if (bufferLength == 1)      //  At least two characters are needed to produce one byte!        {            free(bytes);            return nil;        }                //  Decode the characters in the buffer to bytes.        bytes[length++] = (buffer[0] << 2) | (buffer[1] >> 4);        if (bufferLength > 2)            bytes[length++] = (buffer[1] << 4) | (buffer[2] >> 2);        if (bufferLength > 3)            bytes[length++] = (buffer[2] << 6) | buffer[3];    }        bytes = realloc(bytes, length);    return [NSData dataWithBytesNoCopy:bytes length:length];}- (NSString *)base64Encoding2;{    if ([self length] == 0)        return @"";        char *characters = malloc((([self length] + 2) / 3) * 4);    if (characters == NULL)        return nil;    NSUInteger length = 0;        NSUInteger i = 0;    while (i < [self length])    {        char buffer[3] = {0,0,0};        short bufferLength = 0;        while (bufferLength < 3 && i < [self length])            buffer[bufferLength++] = ((char *)[self bytes])[i++];                //  Encode the bytes in the buffer to four characters, including padding "=" characters if necessary.        characters[length++] = encodingTable[(buffer[0] & 0xFC) >> 2];        characters[length++] = encodingTable[((buffer[0] & 0x03) << 4) | ((buffer[1] & 0xF0) >> 4)];        if (bufferLength > 1)            characters[length++] = encodingTable[((buffer[1] & 0x0F) << 2) | ((buffer[2] & 0xC0) >> 6)];        else characters[length++] = ‘=‘;        if (bufferLength > 2)            characters[length++] = encodingTable[buffer[2] & 0x3F];        else characters[length++] = ‘=‘;    }        return [[NSString alloc] initWithBytesNoCopy:characters length:length encoding:NSASCIIStringEncoding freeWhenDone:YES];}@end

java檔案

package com.yuxin168.library.util;import java.io.UnsupportedEncodingException;import java.security.InvalidAlgorithmParameterException;import java.security.InvalidKeyException;import java.security.NoSuchAlgorithmException;import javax.crypto.BadPaddingException;import javax.crypto.Cipher;import javax.crypto.IllegalBlockSizeException;import javax.crypto.NoSuchPaddingException;import javax.crypto.spec.IvParameterSpec;import javax.crypto.spec.SecretKeySpec;import android.util.Base64;/** * AESº”√‹ *  * @author Baoyz *  */public class AES {public static final String VIPARA = "0102030405060708";public static final String bm = "UTF-8";/** * º”√‹ *  * @param content *            –Ë“™º”√‹µƒƒ⁄»› * @param password *            º”√‹√‹¬Î * @return */public static String encrypt(String content) {try {IvParameterSpec zeroIv = new IvParameterSpec(VIPARA.getBytes());SecretKeySpec key = new SecretKeySpec(getKey().getBytes(), "AES");Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);byte[] encryptedData = cipher.doFinal(content.getBytes(bm));return Base64.encodeToString(encryptedData, 0);} catch (NoSuchAlgorithmException e) {e.printStackTrace();} catch (NoSuchPaddingException e) {e.printStackTrace();} catch (InvalidKeyException e) {e.printStackTrace();} catch (UnsupportedEncodingException e) {e.printStackTrace();} catch (IllegalBlockSizeException e) {e.printStackTrace();} catch (BadPaddingException e) {e.printStackTrace();} catch (InvalidAlgorithmParameterException e) {e.printStackTrace();}return null;}/** * Ω‚√‹ *  * @param content *            ¥?Ω‚√‹ƒ⁄»› * @param password *            Ω‚√‹√‹‘ø * @return */public static String decrypt(String content) {try {byte[] byteMi = Base64.decode(content.getBytes(bm), 0);IvParameterSpec zeroIv = new IvParameterSpec(VIPARA.getBytes());SecretKeySpec key = new SecretKeySpec(getKey().getBytes(), "AES");Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");cipher.init(Cipher.DECRYPT_MODE, key, zeroIv);byte[] decryptedData = cipher.doFinal(byteMi);return new String(decryptedData, bm);} catch (NoSuchAlgorithmException e) {e.printStackTrace();} catch (NoSuchPaddingException e) {e.printStackTrace();} catch (InvalidKeyException e) {e.printStackTrace();} catch (IllegalBlockSizeException e) {e.printStackTrace();} catch (BadPaddingException e) {e.printStackTrace();} catch (UnsupportedEncodingException e) {e.printStackTrace();} catch (InvalidAlgorithmParameterException e) {e.printStackTrace();}return null;}public static String getKey() {return "[email protected]!*&y.)x#[;>";}}

 如下：

http://pan.baidu.com/s/1kT1bzSV