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package miscreant
import (
"bytes"
"encoding/hex"
"encoding/json"
"io/ioutil"
"testing"
)
type streamExample struct {
name string
alg string
key []byte
nonce []byte
blocks []streamBlockExample
}
type streamBlockExample struct {
ad []byte
plaintext []byte
ciphertext []byte
}
// Load STREAM test vectors from aes_siv_stream.tjson
// TODO: switch to a native Go TJSON parser when available
func loadSTREAMExamples() []streamExample {
var examplesJSON map[string]interface{}
exampleData, err := ioutil.ReadFile("vectors/aes_siv_stream.tjson")
if err != nil {
panic(err)
}
if err = json.Unmarshal(exampleData, &examplesJSON); err != nil {
panic(err)
}
examplesArray := examplesJSON["examples:A<O>"].([]interface{})
if examplesArray == nil {
panic("no toplevel 'examples:A<O>' key in aes_siv_stream.tjson")
}
result := make([]streamExample, len(examplesArray))
for i, exampleJSON := range examplesArray {
example := exampleJSON.(map[string]interface{})
name := example["name:s"].(string)
alg := example["alg:s"].(string)
keyHex := example["key:d16"].(string)
key := make([]byte, hex.DecodedLen(len(keyHex)))
if _, err := hex.Decode(key, []byte(keyHex)); err != nil {
panic(err)
}
nonceHex := example["nonce:d16"].(string)
nonce := make([]byte, hex.DecodedLen(len(nonceHex)))
if _, err := hex.Decode(nonce, []byte(nonceHex)); err != nil {
panic(err)
}
blockValues := example["blocks:A<O>"].([]interface{})
blocks := make([]streamBlockExample, len(blockValues))
for j, blockJSON := range blockValues {
block := blockJSON.(map[string]interface{})
adHex := block["ad:d16"].(string)
ad := make([]byte, hex.DecodedLen(len(adHex)))
if _, err := hex.Decode(ad, []byte(adHex)); err != nil {
panic(err)
}
plaintextHex := block["plaintext:d16"].(string)
plaintext := make([]byte, hex.DecodedLen(len(plaintextHex)))
if _, err := hex.Decode(plaintext, []byte(plaintextHex)); err != nil {
panic(err)
}
ciphertextHex := block["ciphertext:d16"].(string)
ciphertext := make([]byte, hex.DecodedLen(len(ciphertextHex)))
if _, err := hex.Decode(ciphertext, []byte(ciphertextHex)); err != nil {
panic(err)
}
blocks[j] = streamBlockExample{ad, plaintext, ciphertext}
}
result[i] = streamExample{name, alg, key, nonce, blocks}
}
return result
}
func TestStreamEncryptor(t *testing.T) {
vectors := loadSTREAMExamples()
for _, v := range vectors {
enc, err := NewStreamEncryptor(v.alg, v.key, v.nonce)
if err != nil {
t.Fatal(err)
}
for i, b := range v.blocks {
lastBlock := i+1 == len(v.blocks)
ct := enc.Seal(nil, b.plaintext, b.ad, lastBlock)
if !bytes.Equal(b.ciphertext, ct) {
t.Errorf("Seal: expected: %x\ngot: %x", b.ciphertext, ct)
}
}
}
}
func TestStreamDecryptor(t *testing.T) {
vectors := loadSTREAMExamples()
for _, v := range vectors {
dec, err := NewStreamDecryptor(v.alg, v.key, v.nonce)
if err != nil {
t.Fatal(err)
}
for i, b := range v.blocks {
lastBlock := i+1 == len(v.blocks)
pt, err := dec.Open(nil, b.ciphertext, b.ad, lastBlock)
if err != nil {
t.Errorf("Open: %s", err)
}
if !bytes.Equal(b.plaintext, pt) {
t.Errorf("Open: expected: %x\ngot: %x", b.plaintext, pt)
}
}
}
}
|
