Digital Arsenal
Flatbuffers

import (
    "encoding/binary"
    "encoding/json"
)

// 1. Receive encryption header
var header EncryptionHeader
json.Unmarshal(receiveFromProducer(), &header)
ctx := module.EncryptionContextForDecryption(myPrivKey, header)

// 2. Decrypt with known index
func decryptMessage(ctx *EncryptionContext, data []byte, idx int) []byte {
    ctx.SetRecordIndex(idx)
    return ctx.DecryptBuffer(data)
}

// 3. Brute force fallback
func decryptWithRecovery(ctx *EncryptionContext, data []byte) ([]byte, int) {
    for i := 0; i < 1000; i++ {
        ctx.SetRecordIndex(i)
        result := ctx.DecryptBuffer(data)
        if result != nil && isValidFlatBuffer(result) {
            return result, i
        }
    }
    return nil, -1
}

import struct, json
from flatc_wasm import EncryptionContext

# 1. Receive encryption header
header = json.loads(receive_from_producer())
ctx = EncryptionContext.for_decryption(my_private_key, header)

# 2. Decrypt with known index
def decrypt_message(ctx, data, index):
    ctx.set_record_index(index)
    return ctx.decrypt_buffer(data)

# 3. Brute force fallback
def decrypt_with_recovery(ctx, data, max_attempts=1000):
    for i in range(max_attempts):
        ctx.set_record_index(i)
        try:
            result = ctx.decrypt_buffer(data)
            if is_valid_flatbuffer(result):
                return result, i
        except Exception:
            continue
    raise RuntimeError("Record index not found")

use flatc_wasm::EncryptionContext;

// 1. Receive header
let header: EncryptionHeader = serde_json::from_slice(
    &receive_from_producer()
)?;
let ctx = EncryptionContext::for_decryption(
    &my_private_key, &header
)?;

// 2. Decrypt with known index
fn decrypt(ctx: &mut EncryptionContext, data: &[u8], idx: u32)
    -> Result<Vec<u8>> {
    ctx.set_record_index(idx);
    ctx.decrypt_buffer(data)
}

// 3. Brute force fallback
fn decrypt_recover(ctx: &mut EncryptionContext, data: &[u8])
    -> Result<(Vec<u8>, u32)> {
    for i in 0..1000 {
        ctx.set_record_index(i);
        if let Ok(result) = ctx.decrypt_buffer(data) {
            if is_valid_flatbuffer(&result) {
                return Ok((result, i));
            }
        }
    }
    Err(anyhow!("Record index not found"))
}

// 1. Receive header
EncryptionHeader header = EncryptionHeader
    .fromJSON(new String(receiveFromProducer()));
EncryptionContext ctx = EncryptionContext
    .forDecryption(myPrivateKey, header);

// 2. Decrypt with known index
byte[] decrypt(EncryptionContext ctx, byte[] data, int idx) {
    ctx.setRecordIndex(idx);
    return ctx.decryptBuffer(data);
}

// 3. Brute force fallback
DecryptResult decryptRecover(EncryptionContext ctx, byte[] data) {
    for (int i = 0; i < 1000; i++) {
        ctx.setRecordIndex(i);
        try {
            byte[] result = ctx.decryptBuffer(data);
            if (isValidFlatBuffer(result))
                return new DecryptResult(result, i);
        } catch (Exception e) { continue; }
    }
    throw new RuntimeException("Record index not found");
}

// 1. Receive header
var header = EncryptionHeader.FromJSON(
    Encoding.UTF8.GetString(ReceiveFromProducer()));
var ctx = EncryptionContext.ForDecryption(
    myPrivateKey, header);

// 2. Decrypt with known index
byte[] Decrypt(EncryptionContext ctx, byte[] data, int idx) {
    ctx.SetRecordIndex(idx);
    return ctx.DecryptBuffer(data);
}

// 3. Brute force fallback
(byte[] data, int idx) DecryptRecover(
    EncryptionContext ctx, byte[] data) {
    for (int i = 0; i < 1000; i++) {
        ctx.SetRecordIndex(i);
        try {
            var result = ctx.DecryptBuffer(data);
            if (IsValidFlatBuffer(result))
                return (result, i);
        } catch { continue; }
    }
    throw new Exception("Record index not found");
}

import FlatBuffers

// 1. Receive header
let headerData = receiveFromProducer()
let header = try EncryptionHeader.fromJSON(headerData)
let ctx = try EncryptionContext.forDecryption(
    privateKey: myPrivateKey, header: header)

// 2. Decrypt with known index
func decrypt(_ ctx: EncryptionContext,
             _ data: Data, index: Int) throws -> Data {
    ctx.setRecordIndex(index)
    return try ctx.decryptBuffer(data)
}

// 3. Brute force fallback
func decryptRecover(_ ctx: EncryptionContext,
                    _ data: Data) throws -> (Data, Int) {
    for i in 0..<1000 {
        ctx.setRecordIndex(i)
        if let result = try? ctx.decryptBuffer(data),
           isValidFlatBuffer(result) {
            return (result, i)
        }
    }
    throw StreamError.recordIndexNotFound
}