Use Chacha20 implementation from official library.

crypto/chacha.go

@@ -5,7 +5,7 @@ import (
 	"crypto/sha512"
 	"encoding/base64"
 
-	"github.com/aead/chacha20"
+	"golang.org/x/crypto/chacha20"
 )
 
 // ChaChaStream is a ChaCha20 cipher that implements Stream and Encrypter interface
@@ -15,7 +15,7 @@ type ChaChaStream struct {
 
 // NewChaChaEncrypter initialize a new ChaChaStream interfaced with Encrypter
 func NewChaChaEncrypter(key []byte, iv []byte) (*ChaChaStream, error) {
-	cipher, err := chacha20.NewCipher(iv, key)
+	cipher, err := chacha20.NewUnauthenticatedCipher(key, iv)
 	if err != nil {
 		return nil, err
 	}
@@ -30,7 +30,7 @@ func NewChaChaEncrypter(key []byte, iv []byte) (*ChaChaStream, error) {
 func NewChaChaStream(key []byte) (*ChaChaStream, error) {
 	hash := sha512.Sum512(key)
 
-	cipher, err := chacha20.NewCipher(hash[32:44], hash[:32])
+	cipher, err := chacha20.NewUnauthenticatedCipher(hash[:32], hash[32:44])
 	if err != nil {
 		return nil, err
 	}

crypto_test.go

@@ -26,7 +26,10 @@ func TestChaCha(t *testing.T) {
 	payload := []byte("test message")
 
 	// Encrypt
-	c, _ := NewStreamManager(ChaChaStreamID, key)
+	c, err := NewStreamManager(ChaChaStreamID, key)
+	if err != nil {
+		t.Fatalf("Failed to create stream manager: %v", err)
+	}
 	crypted := c.Pack(payload)
 
 	// Decrypt

go.mod

@@ -4,16 +4,15 @@ go 1.20
 
 require (
 	github.com/aead/argon2 v0.0.0-20180111183520-a87724528b07
-	github.com/aead/chacha20 v0.0.0-20180709150244-8b13a72661da
 	github.com/google/go-cmp v0.6.0
 	github.com/stretchr/testify v1.8.4
+	golang.org/x/crypto v0.17.0
 	golang.org/x/exp v0.0.0-20230105202349-8879d0199aa3
 )
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	golang.org/x/crypto v0.17.0 // indirect
 	golang.org/x/sys v0.15.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,7 +1,5 @@
 github.com/aead/argon2 v0.0.0-20180111183520-a87724528b07 h1:i9/M2RadeVsPBMNwXFiaYkXQi9lY9VuZeI4Onavd3pA=
 github.com/aead/argon2 v0.0.0-20180111183520-a87724528b07/go.mod h1:Tnm/osX+XXr9R+S71o5/F0E60sRkPVALdhWw25qPImQ=
-github.com/aead/chacha20 v0.0.0-20180709150244-8b13a72661da h1:KjTM2ks9d14ZYCvmHS9iAKVt9AyzRSqNU1qabPih5BY=
-github.com/aead/chacha20 v0.0.0-20180709150244-8b13a72661da/go.mod h1:eHEWzANqSiWQsof+nXEI9bUVUyV6F53Fp89EuCh2EAA=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
@@ -10,14 +8,10 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-golang.org/x/crypto v0.8.0 h1:pd9TJtTueMTVQXzk8E2XESSMQDj/U7OUu0PqJqPXQjQ=
-golang.org/x/crypto v0.8.0/go.mod h1:mRqEX+O9/h5TFCrQhkgjo2yKi0yYA+9ecGkdQoHrywE=
 golang.org/x/crypto v0.17.0 h1:r8bRNjWL3GshPW3gkd+RpvzWrZAwPS49OmTGZ/uhM4k=
 golang.org/x/crypto v0.17.0/go.mod h1:gCAAfMLgwOJRpTjQ2zCCt2OcSfYMTeZVSRtQlPC7Nq4=
 golang.org/x/exp v0.0.0-20230105202349-8879d0199aa3 h1:fJwx88sMf5RXwDwziL0/Mn9Wqs+efMSo/RYcL+37W9c=
 golang.org/x/exp v0.0.0-20230105202349-8879d0199aa3/go.mod h1:CxIveKay+FTh1D0yPZemJVgC/95VzuuOLq5Qi4xnoYc=
-golang.org/x/sys v0.7.0 h1:3jlCCIQZPdOYu1h8BkNvLz8Kgwtae2cagcG/VamtZRU=
-golang.org/x/sys v0.7.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc=
 golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=