Implement NIP-44 encrypt
* passes all valid encrypt test vectors does not include: * invalid test vectors * decryption * conversation key generation using privkey + pubkey
This commit is contained in:
ekzyis
parent
8ef947b350
commit
41865c5107
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@ -0,0 +1,12 @@
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module git.ekzyis.com/ekzyis/nip44
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go 1.21.0
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require (
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github.com/davecgh/go-spew v1.1.1 // indirect
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github.com/pmezard/go-difflib v1.0.0 // indirect
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github.com/stretchr/testify v1.8.4 // indirect
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golang.org/x/crypto v0.13.0 // indirect
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golang.org/x/sys v0.12.0 // indirect
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gopkg.in/yaml.v3 v3.0.1 // indirect
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)
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@ -0,0 +1,13 @@
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github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
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github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
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github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
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github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
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golang.org/x/crypto v0.13.0 h1:mvySKfSWJ+UKUii46M40LOvyWfN0s2U+46/jDd0e6Ck=
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golang.org/x/crypto v0.13.0/go.mod h1:y6Z2r+Rw4iayiXXAIxJIDAJ1zMW4yaTpebo8fPOliYc=
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golang.org/x/sys v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=
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golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
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gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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@ -0,0 +1,152 @@
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package nip44
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import (
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"crypto/hmac"
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"crypto/rand"
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"crypto/sha256"
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"encoding/base64"
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"encoding/binary"
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"errors"
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"io"
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"math"
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"golang.org/x/crypto/chacha20"
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"golang.org/x/crypto/hkdf"
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)
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var (
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MaxPlaintextSize = 65536 - 128 // 64kb - 128
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)
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type EncryptOptions struct {
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Salt []byte
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Version int
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}
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func Encrypt(key []byte, plaintext string, options *EncryptOptions) (string, error) {
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var (
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version int = 1
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salt []byte
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enc []byte
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nonce []byte
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auth []byte
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padded []byte
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ciphertext []byte
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hmac_ []byte
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concat []byte
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err error
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)
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if options.Version != 0 {
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version = options.Version
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} else {
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version = 1
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}
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if options.Salt != nil {
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salt = options.Salt
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} else {
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if salt, err = randomBytes(32); err != nil {
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return "", err
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}
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}
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if version != 1 {
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return "", errors.New("unknown encryption version")
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}
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if len(salt) != 32 {
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return "", errors.New("salt must be 32 bytes")
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}
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if enc, nonce, auth, err = messageKeys(key, salt); err != nil {
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return "", err
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}
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if padded, err = pad(plaintext); err != nil {
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return "", err
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}
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if ciphertext, err = chacha20Encrypt(enc, nonce, []byte(padded)); err != nil {
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return "", err
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}
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hmac_ = sha256Hmac(auth, ciphertext)
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concat = append(concat, salt...)
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concat = append(concat, ciphertext...)
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concat = append(concat, hmac_...)
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return "1" + base64.StdEncoding.EncodeToString(concat), nil
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}
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func chacha20Encrypt(key []byte, nonce []byte, message []byte) ([]byte, error) {
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var (
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cipher *chacha20.Cipher
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dst = make([]byte, len(message))
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err error
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)
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if cipher, err = chacha20.NewUnauthenticatedCipher(key, nonce); err != nil {
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return nil, err
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}
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cipher.XORKeyStream(dst, message)
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return dst, nil
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}
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func randomBytes(n int) ([]byte, error) {
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buf := make([]byte, n)
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if _, err := rand.Read(buf); err != nil {
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return nil, err
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}
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return buf, nil
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}
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func sha256Hmac(key []byte, ciphertext []byte) []byte {
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h := hmac.New(sha256.New, key)
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h.Write(ciphertext)
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return h.Sum(nil)
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}
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func messageKeys(conversationKey []byte, salt []byte) ([]byte, []byte, []byte, error) {
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var (
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r io.Reader
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enc []byte = make([]byte, 32)
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nonce []byte = make([]byte, 12)
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auth []byte = make([]byte, 32)
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err error
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)
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r = hkdf.New(sha256.New, conversationKey, salt, []byte("nip44-v1"))
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if _, err = io.ReadFull(r, enc); err != nil {
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return nil, nil, nil, err
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}
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if _, err = io.ReadFull(r, nonce); err != nil {
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return nil, nil, nil, err
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}
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if _, err = io.ReadFull(r, auth); err != nil {
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return nil, nil, nil, err
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}
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return enc, nonce, auth, nil
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}
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func pad(s string) ([]byte, error) {
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var (
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sb []byte
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sbLen int
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padding int
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result []byte
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)
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sb = []byte(s)
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sbLen = len(sb)
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if sbLen < 1 || sbLen >= MaxPlaintextSize {
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return nil, errors.New("plaintext should be between 1b and 64kB")
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}
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padding = calcPadding(sbLen)
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result = make([]byte, 2)
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binary.BigEndian.PutUint16(result, uint16(sbLen))
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result = append(result, sb...)
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result = append(result, make([]byte, padding-sbLen)...)
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return result, nil
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}
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func calcPadding(sLen int) int {
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var (
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nextPower int
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chunk int
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)
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if sLen <= 32 {
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return 32
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}
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nextPower = 1 << int(math.Floor(math.Log2(float64(sLen-1)))+1)
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chunk = int(math.Max(32, float64(nextPower/8)))
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return chunk * int(math.Floor(float64((sLen-1)/chunk))+1)
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}
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package nip44_test
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import (
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"encoding/hex"
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"testing"
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"git.ekzyis.com/ekzyis/nip44"
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"github.com/stretchr/testify/assert"
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)
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func assertEncrypt(t *testing.T, key string, salt string, plaintext string, expected string) {
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var (
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k []byte
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s []byte
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actual string
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err error
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)
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if k, err = hex.DecodeString(key); err != nil {
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t.Errorf("hex decode failed for key")
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}
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if s, err = hex.DecodeString(salt); err != nil {
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t.Errorf("hex decode failed for salt")
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}
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actual, err = nip44.Encrypt(k, plaintext, &nip44.EncryptOptions{Salt: s})
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if assert.NoError(t, err) {
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assert.Equal(t, expected, actual)
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}
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}
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func TestEncrypt001(t *testing.T) {
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assertEncrypt(t,
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"c6047f9441ed7d6d3045406e95c07cd85c778e4b8cef3ca7abac09b95c709ee5",
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"0000000000000000000000000000000000000000000000000000000000000001",
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"a",
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"1AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHTOSW6Gdkq32HWa3eYdF97ALzFK45Wcg4jeuK7zz3ye/dSEcTB08Xlr+DEgYg7J8kHQaQXZKxiarHVSMiw+vqe4lE=",
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)
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}
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func TestEncrypt002(t *testing.T) {
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assertEncrypt(t,
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"c6047f9441ed7d6d3045406e95c07cd85c778e4b8cef3ca7abac09b95c709ee5",
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"f00000000000000000000000000000f00000000000000000000000000000000f",
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"a",
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"18AAAAAAAAAAAAAAAAAAA8AAAAAAAAAAAAAAAAAAAAA+a0vMgbnISrKRDMofXovg8VbAAhbzq+mGWJdXk8B8ghukg530TqwmeXWMP1NxGKkgMG9biGbuZO96INKNZbNRlsc0=",
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)
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}
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func TestEncrypt003(t *testing.T) {
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assertEncrypt(t,
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"94da47d851b9c1ed33b3b72f35434f56aa608d60e573e9c295f568011f4f50a4",
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"b635236c42db20f021bb8d1cdff5ca75dd1a0cc72ea742ad750f33010b24f73b",
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"hello",
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"1tjUjbELbIPAhu40c3/XKdd0aDMcup0KtdQ8zAQsk9zuSsVmJEDFI8g3JbPGCpjtRkbN6vQUabk5VABU/+Of5YsnPnf2sWHwrqxJAQpCNrcvYURhE8N6ozQuL4YIJoYS8dg4=",
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)
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}
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func TestEncrypt004(t *testing.T) {
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assertEncrypt(t,
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"ab99c122d4586cdd5c813058aa543d0e7233545dbf6874fc34a3d8d9a18fbbc3",
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"b20989adc3ddc41cd2c435952c0d59a91315d8c5218d5040573fc3749543acaf",
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"ability🤝的",
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"1sgmJrcPdxBzSxDWVLA1ZqRMV2MUhjVBAVz/DdJVDrK9lMoaMWXcf/EdinErxE6UBRilzkGL9G+tzfh1KNVU/Oc1zF2viAJHDbYFpyPvDJjv6lEsU9CPT39RrwBsGQex9w+Y=",
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)
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}
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func TestEncrypt005(t *testing.T) {
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assertEncrypt(t,
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"22cfa4f054bbf05d0bcf27a3ecfcb6f0e59b84f6ec6a27ba153484c0160ea3e7",
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"b19c7e24de280656ecf5c1999f1d9db9d1b4accd725c4d509d698cb58206f5a3",
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"island👀привет",
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"1sZx+JN4oBlbs9cGZnx2dudG0rM1yXE1QnWmMtYIG9aMu7jiyg6elfGEBHT8vr8/kCqKDUBpEjWVd4OeOn1IoeYaK6KKhp4eBTLiSg04m9NTxCNe6wd+Km1gbKOSSu8m6lYs=",
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)
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}
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func TestEncrypt006(t *testing.T) {
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assertEncrypt(t,
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"a449f2a85c6d3db0f44c64554a05d11a3c0988d645e4b4b2592072f63662f422",
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"8d4442713eb9d4791175cb040d98d6fc5be8864d6ec2f89cf0895a2b2b72d1b1",
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"pepper👀їжак",
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"1jURCcT651HkRdcsEDZjW/Fvohk1uwvic8IlaKyty0bERl5cBQxCc1p1wc1HkEBJUxQYTIxac7hLr9lD19xfyosePy2ZQamMMMpgMRlWkAxGCWDVHAcX/sB9VQW6kTGGdMmw=",
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)
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}
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func TestEncrypt007(t *testing.T) {
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assertEncrypt(t,
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"decde9938ffcb14fa7ff300105eb1bf239469af9baf376e69755b9070ae48c47",
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"2180b52ae645fcf9f5080d81b1f0b5d6f2cd77ff3c986882bb549158462f3407",
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"あいさつ👀pepper",
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"1IYC1KuZF/Pn1CA2BsfC11vLNd/88mGiCu1SRWEYvNAfIrYmhfhmnCoT/09aEF5Iv5ytpP83YRqh9O0ea3Tml47hl10objAvLHc36fKYDQG49OxHxUazqLDLBerxAN6HeU2A=",
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)
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}
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func TestEncrypt008(t *testing.T) {
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assertEncrypt(t,
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"c6f2fde7aa00208c388f506455c31c3fa07caf8b516d43bf7514ee19edcda994",
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"e4cd5f7ce4eea024bc71b17ad456a986a74ac426c2c62b0a15eb5c5c8f888b68",
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"people💃的 people💃的 people💃的 people💃的 people💃的",
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"15M1ffOTuoCS8cbF61FaphqdKxCbCxisKFetcXI+Ii2i6Q92kxZtgNCR/yHuuxwTUG6f2EgWBkmn3IQiWNhP4Givk4ZRZ7B+XVSlpLlHR93a3DIi+LzgHms6IBfyMXtTws5a071V4AfhdfBdPHc/2Dx/luOroPlx8WKA4g48cMI5cHTpjzR/397Dwv0vzIoE0Wn7AzsiLRUjho4orHIl4YOT0",
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)
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}
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func TestEncrypt009(t *testing.T) {
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assertEncrypt(t,
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"c6f2fde7aa00208c388f506455c31c3fa07caf8b516d43bf7514ee19edcda994",
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"38d1ca0abef9e5f564e89761a86cee04574b6825d3ef2063b10ad75899e4b023",
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"people💃的 people💃的 people💃的 people💃的 people💃的 people💃的",
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"1ONHKCr755fVk6JdhqGzuBFdLaCXT7yBjsQrXWJnksCPUDy+AuM/JjiOcDfb+HYyM86BhGVGbMtBJIznJqf+QyyK4br9OpnZjQktVQ5V5mQjT8UBvdoft2Mx9o0gHz1/VGltfBoS3+udaFJIt6NBF0AGMIWvi5dCzWdlVqZlRGhxMNy+hugQTJGVl0sn2WquWq/j7pEQ4IegrdOjCaEm2i76b",
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)
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}
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func TestEncrypt010(t *testing.T) {
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assertEncrypt(t,
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"c6f2fde7aa00208c388f506455c31c3fa07caf8b516d43bf7514ee19edcda994",
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"4f1a31909f3483a9e69c8549a55bbc9af25fa5bbecf7bd32d9896f83ef2e12e0",
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"people💃的 people💃的 people💃的 people💃的 people💃的 people💃的 people💃的",
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||||||
|
"1TxoxkJ80g6nmnIVJpVu8mvJfpbvs970y2Ylvg+8uEuAiL5ShBCogVU05zdUlp0bOzfV7PXhx1IjdTEG4EWsz9SQqwwFZZNMRU9IW6jga6uuXVRBV3RharTWBZtNfJhYtwAf2K9FHxO4T8PkQ1W0PckZs6Bun0vG3qIZtkqrMqWoH/omP0ind+9kFxsqi+1k6ad8JO/Hko2y/YLrlFupRZnwe7NjEbZFZmvndPQoGA4nN37Z9/XIzk1MJyjZGphqF3AA=",
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestEncrypt011(t *testing.T) {
|
||||||
|
assertEncrypt(t,
|
||||||
|
"c6f2fde7aa00208c388f506455c31c3fa07caf8b516d43bf7514ee19edcda994",
|
||||||
|
"a3e219242d85465e70adcd640b564b3feff57d2ef8745d5e7a0663b2dccceb54",
|
||||||
|
"people💃的 people💃的 people💃的 people💃的 people💃的 people💃的 people💃的 people💃的",
|
||||||
|
"1o+IZJC2FRl5wrc1kC1ZLP+/1fS74dF1eegZjstzM61SVnOdO3J0zky0Bqpp0BXKPKv58Iw088z2b8relJxw0l+ddORD60R1rMNpQfWx4EbKCU/qV40jGYny0EqX4yIIYjRwqcAieIIaaOyGTZcYVcJiRswqOBcUQCAlO6E1+wNYweMwjjrQI3G0rO2Fbng2VYCwGWP2t9T0Kd/kVMukM9DuessMRB2uuoiD2pQz1q9XrzOy3uOChNa5c9fwpuq5UCiA=",
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestEncrypt012(t *testing.T) {
|
||||||
|
assertEncrypt(t, "7a1ccf5ce5a08e380f590de0c02776623b85a61ae67cfb6a017317e505b7cb51",
|
||||||
|
"a000000000000000000000000000000000000000000000000000000000000001",
|
||||||
|
"a",
|
||||||
|
"1oAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFNT8GMeM9D/8kVHayoPPnYyIoBXoYXUEwlvwb61OtoikfwRuTI62oZ2dsD4HE/he0eCd4aIb+4gqv+3oRQGk62SF8=",
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestEncrypt013(t *testing.T) {
|
||||||
|
assertEncrypt(t,
|
||||||
|
"aa971537d741089885a0b48f2730a125e15b36033d089d4537a4e1204e76b39e",
|
||||||
|
"b000000000000000000000000000000000000000000000000000000000000002",
|
||||||
|
"A Peer-to-Peer Electronic Cash System",
|
||||||
|
"1sAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAALmLsOQlNZ4u0Hthr0erS1GSK4kxKWVfikA7rrb1SjPSW6H9TbmtgV1qRKRzdJLn+8OQthPl1d+Ec4HZGZ04uGRTZe7wD0+0NCcjLP+eZ+fOZyxpQIG9bz47JHlOLDbefLWiQ==",
|
||||||
|
)
|
||||||
|
}
|
||||||
|
func TestEncrypt014(t *testing.T) {
|
||||||
|
assertEncrypt(t,
|
||||||
|
"79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798",
|
||||||
|
"79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798",
|
||||||
|
"A purely peer-to-peer version of electronic cash would allow online payments to be sent directly from one party to another without going through a financial institution. Digital signatures provide part of the solution, but the main benefits are lost if a trusted third party is still required to prevent double-spending.",
|
||||||
|
"1eb5mfvncu6xVoGKVzocLBwKb/NstzijZWfKBWxb4F5hXrER9RhYy3Imek+ouGzV6t+hFd+7Xod7ZF8HCzdFy6d8B+4xRfGKBepOJhDQ/Jmei5JHWx8KWX0yMWcuf6i9rrzXzKbQIrPJZ7NrbQUJdsE7atUmqV4gd5i1b/mbzGnL8ak3/qgjvwPN2ksqwMnCiGO3Lt9kFDuDDYSwqi0zwwxxuunc7bqf8HTF4bVPi/Rdyo8p6+V9EWzZ4AKgflZwfoAH63TcTqzAP1gjf7To8q02xIc8fTM3GkWVOgquuYSYkt2X18QRlpNQ0JZf7ynUY5sFw7pLoVmxgMedFGSN01hBhIEPNOJl/+9JFbfLDLe1NLuGa0QuX5pM2K8ndzR1LliVbth7bNFSDcAVKWbQSC57jSoip3+gDgy4ElnDxwi58cOlVncM+OVVoM60T3KfyAONZmVv2BwE3k6u3Wzy2JRh23o6JFhOGZH61WLZZtpq5vz/be2w8IaUByuvyqbMQmNk=",
|
||||||
|
)
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue