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我在我的應用程序中使用蘋果「cryptoexcercise」（Security.Framework）來加密和解密數值數據。當我給出輸入950,128時，這些值被加密，但它沒有被解密並且僅以加密值存在。這隻發生在所提到的數值上。你能否請檢查這個問題並提供解決方案來解決這個問題？CryptoExcercise加密/解密問題
這裏是我的代碼
(void)testAsymmetricEncryptionAndDecryption {
uint8_t *plainBuffer; uint8_t *cipherBuffer; uint8_t *decryptedBuffer;
const char inputString[] = "950"; int len = strlen(inputString);
if (len > BUFFER_SIZE) len = BUFFER_SIZE-1;
plainBuffer = (uint8_t *)calloc(BUFFER_SIZE, sizeof(uint8_t)); cipherBuffer = (uint8_t *)calloc(CIPHER_BUFFER_SIZE, sizeof(uint8_t)); decryptedBuffer = (uint8_t *)calloc(BUFFER_SIZE, sizeof(uint8_t));
strncpy((char *)plainBuffer, inputString, len);
NSLog(@"plain text : %s", plainBuffer);
[self encryptWithPublicKey:(UInt8 *)plainBuffer cipherBuffer:cipherBuffer];
NSLog(@"encrypted data: %s", cipherBuffer);
[self decryptWithPrivateKey:cipherBuffer plainBuffer:decryptedBuffer];
NSLog(@"decrypted data: %s", decryptedBuffer);
free(plainBuffer); free(cipherBuffer); free(decryptedBuffer); }
(void)encryptWithPublicKey:(uint8_t *)plainBuffer cipherBuffer:(uint8_t *)cipherBuffer {
OSStatus status = noErr;
size_t plainBufferSize = strlen((char *)plainBuffer); size_t cipherBufferSize = CIPHER_BUFFER_SIZE;
NSLog(@"SecKeyGetBlockSize() public = %d", SecKeyGetBlockSize([self getPublicKeyRef])); // Error handling // Encrypt using the public. status = SecKeyEncrypt([self getPublicKeyRef], PADDING, plainBuffer, plainBufferSize, &cipherBuffer[0], &cipherBufferSize); NSLog(@"encryption result code: %d (size: %d)", status, cipherBufferSize); NSLog(@"encrypted text: %s", cipherBuffer); }
(void)decryptWithPrivateKey:(uint8_t *)cipherBuffer plainBuffer:(uint8_t *)plainBuffer { OSStatus status = noErr;
size_t cipherBufferSize = strlen((char *)cipherBuffer);
NSLog(@"decryptWithPrivateKey: length of buffer: %d", BUFFER_SIZE); NSLog(@"decryptWithPrivateKey: length of input: %d", cipherBufferSize);
// DECRYPTION size_t plainBufferSize = BUFFER_SIZE;
// Error handling status = SecKeyDecrypt([self getPrivateKeyRef], PADDING, &cipherBuffer[0], cipherBufferSize, &plainBuffer[0], &plainBufferSize); NSLog(@"decryption result code: %d (size: %d)", status, plainBufferSize); NSLog(@"FINAL decrypted text: %s", plainBuffer);
}
(SecKeyRef)getPublicKeyRef { OSStatus sanityCheck = noErr; SecKeyRef publicKeyReference = NULL;
if (publicKeyRef == NULL) { NSMutableDictionary *queryPublicKey = [[NSMutableDictionary alloc] init];
// Set the public key query dictionary.
[queryPublicKey setObject:(id)kSecClassKey forKey:(id)kSecClass];
[queryPublicKey setObject:publicTag forKey:(id)kSecAttrApplicationTag];
[queryPublicKey setObject:(id)kSecAttrKeyTypeRSA forKey:(id)kSecAttrKeyType];
[queryPublicKey setObject:[NSNumber numberWithBool:YES] forKey:(id)kSecReturnRef];
// Get the key.
sanityCheck = SecItemCopyMatching((CFDictionaryRef)queryPublicKey, (CFTypeRef *)&publicKeyReference);
if (sanityCheck != noErr)
{
publicKeyReference = NULL;
}
[queryPublicKey release];
} else { publicKeyReference = publicKeyRef; }
return publicKeyReference; }
(SecKeyRef)getPrivateKeyRef { OSStatus resultCode = noErr; SecKeyRef privateKeyReference = NULL;
if(privateKeyRef == NULL) { NSMutableDictionary * queryPrivateKey = [[NSMutableDictionary alloc] init];
// Set the private key query dictionary.
[queryPrivateKey setObject:(id)kSecClassKey forKey:(id)kSecClass];
[queryPrivateKey setObject:privateTag forKey:(id)kSecAttrApplicationTag];
[queryPrivateKey setObject:(id)kSecAttrKeyTypeRSA forKey:(id)kSecAttrKeyType];
[queryPrivateKey setObject:[NSNumber numberWithBool:YES] forKey:(id)kSecReturnRef];
// Get the key.
resultCode = SecItemCopyMatching((CFDictionaryRef)queryPrivateKey, (CFTypeRef *)&privateKeyReference);
NSLog(@"getPrivateKey: result code: %d", resultCode);
if(resultCode != noErr)
{
privateKeyReference = NULL;
}
[queryPrivateKey release];
} else { privateKeyReference = privateKeyRef; }
return privateKeyReference; }