superdoliant/rhrsautil

RSA一站式解决办法

rhrsautil's Issues

rsa验签的时候在通过key获取SecKeyGetBlockSize的时候崩溃。

• (BOOL)RSAVerifyWithSHA1:(NSData *)signature plainString:(NSString *)plainString publicKey:(NSString *)publickey{
  if (!signature || !plainString || !publickey) {
  NSLog(@"参数不能为空");
  return false;
  }

  SecKeyRef key = [self addPublicKey:publickey];
  size_t signedHashBytesSize = SecKeyGetBlockSize(key);

  // 要验证的签名
  NSData *signatureData = signature;
  const void *signedHashBytes = [signatureData bytes];

  // 待验证的字符串
  NSData *plainData = [plainString dataUsingEncoding:NSUTF8StringEncoding];

  size_t hashBytesSize = CC_SHA1_DIGEST_LENGTH;
  uint8_t *hashBytes = malloc(hashBytesSize);
  if (!CC_SHA1([plainData bytes], (CC_LONG)[plainData length], hashBytes)) {
  return false;
  }

  OSStatus status = SecKeyRawVerify(key,
  kSecPaddingPKCS1SHA1,
  hashBytes, // SHA1签名之后的原字符串
  hashBytesSize, // SHA1签名的长度
  signedHashBytes, // 签名值
  signedHashBytesSize); // 公钥长度(签名值不能超过公钥的长度)

  if(hashBytes) free(hashBytes);

  return status == errSecSuccess;
  }
  大佬，请指点一下，为什么在这个 size_t signedHashBytesSize = SecKeyGetBlockSize(key);
  地方通过key获取size_t的时候崩溃闪退比较多呢。多谢。

黄大佬，这个工具类在使用过程中崩溃，这个项目源码是您亲自写的，能否帮忙看一下，这个工具类不少地方崩溃。

• (NSData*)rsaDecryptData:(NSData*)data privKey:(NSString * )privKey{
  SecKeyRef key = [MDWRSAUtil addPrivateKey:privKey];
  size_t cipherBufferSize = SecKeyGetBlockSize(key);
  size_t blockSize = cipherBufferSize;
  size_t blockCount = (size_t)ceil([data length] / (double)blockSize);

  NSMutableData *decryptedData = [[NSMutableData alloc] init];

  for (int i = 0; i < blockCount; i++) {
  unsigned long bufferSize = MIN(blockSize , [data length] - i * blockSize);
  NSData *buffer = [data subdataWithRange:NSMakeRange(i * blockSize, bufferSize)];

    size_t cipherLen = [buffer length];
    void *cipher = malloc(cipherLen);
    [buffer getBytes:cipher length:cipherLen];
    size_t plainLen = SecKeyGetBlockSize(key);
    void *plain = malloc(plainLen);
    
    OSStatus status = SecKeyDecrypt(key, kSecPaddingPKCS1, cipher, cipherLen, plain, &plainLen);
    
    if (status != noErr) {
        return nil;
    }
    
    NSData *decryptedBytes = [[NSData alloc] initWithBytes:(const void *)plain length:plainLen];
    [decryptedData appendData:decryptedBytes];
  

  }

  return decryptedData;
  }
  在第四行获取blocksize的时候，捕捉到异常崩溃。请大佬指点迷津，可能是哪里的问题。