我已经用Java创建了一个适用于Android的应用程序,并使用Cipher
类使用AES加密数据。现在,我想将该算法与CommonCrypto
类一起带入iOS 。该代码有效,但结果不同。
这是Java中的代码:
public static String Decrypt(String text, String key) throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
byte[] keyBytes = new byte[16];
byte[] b = key.getBytes("UTF-8");
int len = b.length;
if (len > keyBytes.length)
len = keyBytes.length;
System.arraycopy(b, 0, keyBytes, 0, len);
SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");
IvParameterSpec ivSpec = new IvParameterSpec(keyBytes);
cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
byte[] results = new byte[text.length()];
BASE64Decoder decoder = new BASE64Decoder();
try {
results = cipher.doFinal(decoder.decodeBuffer(text));
} catch (Exception e) {
System.out.print("Erron in Decryption");
}
return new String(results, "UTF-8");
}
public static String Encrypt(String text, String key) throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
byte[] keyBytes = new byte[16];
byte[] b = key.getBytes("UTF-8");
int len = b.length;
if (len > keyBytes.length)
len = keyBytes.length;
System.arraycopy(b, 0, keyBytes, 0, len);
SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");
IvParameterSpec ivSpec = new IvParameterSpec(keyBytes);
System.out.println(keyBytes);
System.out.println(keySpec);
System.out.println(ivSpec);
cipher.init(Cipher.ENCRYPT_MODE, keySpec, ivSpec);
byte[] results = cipher.doFinal(text.getBytes("UTF-8"));
BASE64Encoder encoder = new BASE64Encoder();
return encoder.encode(results);
}
这是Objective-C中的代码:
+ (NSString*)AES256EncryptData:(NSString*)data WithKey:(NSString*)key {
char keyPtr[kCCKeySizeAES128]; // room for terminator (unused)
bzero(keyPtr, sizeof(keyPtr)); // fill with zeroes (for padding)
// fetch key data
[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
NSUInteger dataLength = data.length;
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void* buffer = malloc(bufferSize);
size_t numBytesEncrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt, kCCAlgorithmAES128, kCCOptionPKCS7Padding,
keyPtr, kCCKeySizeAES256,
NULL /* initialization vector (optional) */,
data.UTF8String, dataLength, /* input */
buffer, bufferSize, /* output */
&numBytesEncrypted);
if (cryptStatus == kCCSuccess) {
return [[NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted] base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithCarriageReturn];
}
free(buffer); //free the buffer;
return nil;
}
+ (NSString*)AES256DecryptData:(NSString*)data WithKey:(NSString*)key {
char keyPtr[kCCKeySizeAES256 + 1]; // room for terminator (unused)
bzero(keyPtr, sizeof(keyPtr)); // fill with zeroes (for padding)
// fetch key data
[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
NSUInteger dataLength = data.length;
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void* buffer = malloc(bufferSize);
size_t numBytesDecrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt, kCCAlgorithmAES128, kCCOptionPKCS7Padding,
keyPtr, kCCKeySizeAES256,
NULL /* initialization vector (optional) */,
data.UTF8String, dataLength, /* input */
buffer, bufferSize, /* output */
&numBytesDecrypted);
if (cryptStatus == kCCSuccess) {
return [[NSData dataWithBytesNoCopy:buffer length:numBytesDecrypted] base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithCarriageReturn];
}
free(buffer); //free the buffer;
return nil;
}
更新1:
数据: text to encrypt
钥匙: testkey
Java (所需)结果:7ptTEyImNz9KgC96+JPFXQ==
Objective-C结果: U7FAVHi01q0Hhf+m9NsKjw==
您的问题出在Objective-C代码上。您应该在Java和Obj-C中使用相同的方法。您可以使用以下代码来使其返回相同的结果:
AES文件
#import <Foundation/Foundation.h>
#import <CommonCrypto/CommonCrypto.h>
@interface AES : NSObject
+ (NSData *)Encrypt:(NSString *)data WithKey:(NSString *)key;
+ (NSString *)Decrypt:(NSData *)data WithKey:(NSString *)key;
+ (NSData *)AESOperation:(CCOperation)operation OnData:(NSData *)data key:(NSString *)key;
@end
AES
#import "AES.h"
@implementation AES
+ (NSData *)Encrypt:(NSString *)data WithKey:(NSString *)key {
return [self AESOperation:kCCEncrypt OnData:[data dataUsingEncoding:NSUTF8StringEncoding] key:key];
}
+ (NSString *)Decrypt:(NSData *)data WithKey:(NSString *)key {
return [[NSString alloc] initWithData:[self AESOperation:kCCDecrypt OnData:data key:key] encoding:NSUTF8StringEncoding];
}
+ (NSData *)AESOperation:(CCOperation)operation OnData:(NSData *)data key:(NSString *)key {
char keyPtr[kCCKeySizeAES128];
bzero(keyPtr, sizeof(keyPtr));
[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
NSUInteger dataLength = [data length];
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void *buffer = malloc(bufferSize);
size_t numBytesEncrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(operation,
kCCAlgorithmAES128,
kCCOptionPKCS7Padding,
keyPtr,
kCCBlockSizeAES128,
keyPtr,
[data bytes],
dataLength,
buffer,
bufferSize,
&numBytesEncrypted);
if (cryptStatus == kCCSuccess) {
return [NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted];
}
free(buffer);
return nil;
}
@end
本文收集自互联网,转载请注明来源。
如有侵权,请联系[email protected] 删除。
我来说两句