public EncryptedKvDecoder(InputStream in, Decryptor decryptor) {
super(in);
this.decryptor = decryptor;
if (decryptor != null) {
this.iv = new byte[decryptor.getIvLength()];
}
}
@Override
protected Cell parseCell() throws IOException {
if (this.decryptor == null) {
return super.parseCell();
}
int ivLength = 0;
ivLength = StreamUtils.readRawVarint32(in);
// TODO: An IV length of 0 could signify an unwrapped cell, when the
// encoder supports that just read the remainder in directly
if (ivLength != this.iv.length) {
throw new IOException("Incorrect IV length: expected=" + iv.length + " have=" + ivLength);
}
IOUtils.readFully(in, this.iv);
int codedLength = StreamUtils.readRawVarint32(in);
byte[] codedBytes = new byte[codedLength];
IOUtils.readFully(in, codedBytes);
decryptor.setIv(iv);
decryptor.reset();
InputStream cin = decryptor.createDecryptionStream(new ByteArrayInputStream(codedBytes));
// TODO: Add support for WAL compression
int keylength = StreamUtils.readRawVarint32(cin);
int vlength = StreamUtils.readRawVarint32(cin);
int tagsLength = StreamUtils.readRawVarint32(cin);
int length = 0;
if (tagsLength == 0) {
length = KeyValue.KEYVALUE_INFRASTRUCTURE_SIZE + keylength + vlength;
} else {
length = KeyValue.KEYVALUE_WITH_TAGS_INFRASTRUCTURE_SIZE + keylength + vlength + tagsLength;
}
byte[] backingArray = new byte[length];
int pos = 0;
pos = Bytes.putInt(backingArray, pos, keylength);
pos = Bytes.putInt(backingArray, pos, vlength);
// Row
int elemLen = StreamUtils.readRawVarint32(cin);
pos = Bytes.putShort(backingArray, pos, (short) elemLen);
IOUtils.readFully(cin, backingArray, pos, elemLen);
pos += elemLen;
// Family
elemLen = StreamUtils.readRawVarint32(cin);
pos = Bytes.putByte(backingArray, pos, (byte) elemLen);
IOUtils.readFully(cin, backingArray, pos, elemLen);
pos += elemLen;
// Qualifier
elemLen = StreamUtils.readRawVarint32(cin);
IOUtils.readFully(cin, backingArray, pos, elemLen);
pos += elemLen;
// Remainder
IOUtils.readFully(cin, backingArray, pos, length - pos);
return new KeyValue(backingArray, 0, length);
}