@(iOS学习)[ios | 笔记]
iOS于JAVA后台的AES兼容
iOS的AES Padding只支持ccPKCS7Padding, ccNoPadding, 而如果JAVA后端的AES加密解密用到PKCS5Padding的话, 那么iOS端就需要自己去实现了.
代码如下:
- (NSString*) EncodeText:(NSString*)plainText enc:(CCOperation)encryptOrDecrypt{
const void *vplainText;
size_t plainTextBufferSize;
if (encryptOrDecrypt == kCCDecrypt)
{
NSString *base64EncodedString = [[plainText dataUsingEncoding:NSUTF8StringEncoding] base64EncodedStringWithOptions:0];
NSData *encryptData = [[NSData alloc]initWithBase64EncodedString:base64EncodedString options:0];
plainTextBufferSize = [encryptData length];
vplainText = [encryptData bytes];
}
else
{
plainTextBufferSize = [plainText length];
vplainText = (const void *) [plainText UTF8String];
}
CCCryptorStatus ccStatus;
uint8_t *bufferPtr = NULL;
size_t bufferPtrSize = 0;
size_t movedBytes = 0;
bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1);
bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t));
memset((void *)bufferPtr, 0x0, bufferPtrSize);
// 设置你的AES key
const unsigned char *keyString = (const unsigned char *)[@"ASAF#Key$M0BiLE!WS@DG_1@" cStringUsingEncoding: NSUTF8StringEncoding];
// 这里你的AES IV
const unsigned char *initializeVactorString = (const unsigned char *)[@"ASAF@DG#" cStringUsingEncoding: NSUTF8StringEncoding];
uint8_t iv[kCCBlockSize3DES];
memset((void *) iv, 0x0, (size_t) sizeof(iv));
ccStatus = CCCrypt(encryptOrDecrypt,
kCCAlgorithm3DES,
kCCOptionPKCS7Padding,
keyString,
kCCKeySize3DES,
initializeVactorString,
vplainText,
plainTextBufferSize,
(void *)bufferPtr,
bufferPtrSize,
&movedBytes);
if (ccStatus == kCCSuccess) NSLog(@"SUCCESS");
else{
if (ccStatus == kCCParamError) return @"PARAM ERROR";
else if (ccStatus == kCCBufferTooSmall) return @"BUFFER TOO SMALL";
else if (ccStatus == kCCMemoryFailure) return @"MEMORY FAILURE";
else if (ccStatus == kCCAlignmentError) return @"ALIGNMENT";
else if (ccStatus == kCCDecodeError) return @"DECODE ERROR";
else if (ccStatus == kCCUnimplemented) return @"UNIMPLEMENTED";
}
NSString *result;
if (encryptOrDecrypt == kCCDecrypt)
{
result = [ [NSString alloc] initWithData: [NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes] encoding:NSASCIIStringEncoding];
}
else
{
NSData *myData = [NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes];
result = [myData base64EncodedStringWithOptions:0];
}
NSLog(@"%@",result);
return result;
}
参看:
