Implemented /profile/{username} endpoint to get complete profile with signed by the current server textures.

Implemented /signing-key endpoint to get public key in der format, used to sign the textures.
Improved logging of errors from http package.
Changed behavior of the /cloaks endpoint

signer/signer.go

@@ -0,0 +1,42 @@
+package signer
+
+import (
+	"crypto"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/sha1"
+	"encoding/base64"
+	"errors"
+)
+
+var randomReader = rand.Reader
+
+type Signer struct {
+	Key *rsa.PrivateKey
+}
+
+func (s *Signer) SignTextures(textures string) (string, error) {
+	if s.Key == nil {
+		return "", errors.New("Key is empty")
+	}
+
+	message := []byte(textures)
+	messageHash := sha1.New()
+	_, _ = messageHash.Write(message)
+	messageHashSum := messageHash.Sum(nil)
+
+	signature, err := rsa.SignPKCS1v15(randomReader, s.Key, crypto.SHA1, messageHashSum)
+	if err != nil {
+		panic(err)
+	}
+
+	return base64.StdEncoding.EncodeToString(signature), nil
+}
+
+func (s *Signer) GetPublicKey() (*rsa.PublicKey, error) {
+	if s.Key == nil {
+		return nil, errors.New("Key is empty")
+	}
+
+	return &s.Key.PublicKey, nil
+}

signer/signer_test.go

@@ -0,0 +1,64 @@
+package signer
+
+import (
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+
+	"testing"
+
+	assert "github.com/stretchr/testify/require"
+)
+
+type ConstantReader struct {
+}
+
+func (c *ConstantReader) Read(p []byte) (int, error) {
+	return 1, nil
+}
+
+func TestSigner_SignTextures(t *testing.T) {
+	randomReader = &ConstantReader{}
+
+	t.Run("sign textures", func(t *testing.T) {
+		rawKey, _ := pem.Decode([]byte("-----BEGIN RSA PRIVATE KEY-----\nMIIBOwIBAAJBANbUpVCZkMKpfvYZ08W3lumdAaYxLBnmUDlzHBQH3DpYef5WCO32\nTDU6feIJ58A0lAywgtZ4wwi2dGHOz/1hAvcCAwEAAQJAItaxSHTe6PKbyEU/9pxj\nONdhYRYwVLLo56gnMYhkyoEqaaMsfov8hhoepkYZBMvZFB2bDOsQ2SaJ+E2eiBO4\nAQIhAPssS0+BR9w0bOdmjGqmdE9NrN5UJQcOW13s29+6QzUBAiEA2vWOepA5Apiu\npEA3pwoGdkVCrNSnnKjDQzDXBnpd3/cCIEFNd9sY4qUG4FWdXN6RnmXL7Sj0uZfH\nDMwzu8rEM5sBAiEAhvdoDNqLmbMdq3c+FsPSOeL1d21Zp/JK8kbPtFmHNf8CIQDV\n6FSZDwvWfuxaM7BsycQONkjDBTPNu+lqctJBGnBv3A==\n-----END RSA PRIVATE KEY-----\n"))
+		key, _ := x509.ParsePKCS1PrivateKey(rawKey.Bytes)
+
+		signer := &Signer{key}
+
+		signature, err := signer.SignTextures("eyJ0aW1lc3RhbXAiOjE2MTQzMDcxMzQsInByb2ZpbGVJZCI6ImZmYzhmZGM5NTgyNDUwOWU4YTU3Yzk5Yjk0MGZiOTk2IiwicHJvZmlsZU5hbWUiOiJFcmlja1NrcmF1Y2giLCJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly9lbHkuYnkvc3RvcmFnZS9za2lucy82OWM2NzQwZDI5OTNlNWQ2ZjZhN2ZjOTI0MjBlZmMyOS5wbmcifX0sImVseSI6dHJ1ZX0")
+		assert.NoError(t, err)
+		assert.Equal(t, "IyHCxTP5ITquEXTHcwCtLd08jWWy16JwlQeWg8naxhoAVQecHGRdzHRscuxtdq/446kmeox7h4EfRN2A2ZLL+A==", signature)
+	})
+
+	t.Run("empty key", func(t *testing.T) {
+		signer := &Signer{}
+
+		signature, err := signer.SignTextures("hello world")
+		assert.Error(t, err, "Key is empty")
+		assert.Empty(t, signature)
+	})
+}
+
+func TestSigner_GetPublicKey(t *testing.T) {
+	randomReader = &ConstantReader{}
+
+	t.Run("get public key", func(t *testing.T) {
+		rawKey, _ := pem.Decode([]byte("-----BEGIN RSA PRIVATE KEY-----\nMIIBOwIBAAJBANbUpVCZkMKpfvYZ08W3lumdAaYxLBnmUDlzHBQH3DpYef5WCO32\nTDU6feIJ58A0lAywgtZ4wwi2dGHOz/1hAvcCAwEAAQJAItaxSHTe6PKbyEU/9pxj\nONdhYRYwVLLo56gnMYhkyoEqaaMsfov8hhoepkYZBMvZFB2bDOsQ2SaJ+E2eiBO4\nAQIhAPssS0+BR9w0bOdmjGqmdE9NrN5UJQcOW13s29+6QzUBAiEA2vWOepA5Apiu\npEA3pwoGdkVCrNSnnKjDQzDXBnpd3/cCIEFNd9sY4qUG4FWdXN6RnmXL7Sj0uZfH\nDMwzu8rEM5sBAiEAhvdoDNqLmbMdq3c+FsPSOeL1d21Zp/JK8kbPtFmHNf8CIQDV\n6FSZDwvWfuxaM7BsycQONkjDBTPNu+lqctJBGnBv3A==\n-----END RSA PRIVATE KEY-----\n"))
+		key, _ := x509.ParsePKCS1PrivateKey(rawKey.Bytes)
+
+		signer := &Signer{key}
+
+		publicKey, err := signer.GetPublicKey()
+		assert.NoError(t, err)
+		assert.IsType(t, &rsa.PublicKey{}, publicKey)
+	})
+
+	t.Run("empty key", func(t *testing.T) {
+		signer := &Signer{}
+
+		publicKey, err := signer.GetPublicKey()
+		assert.Error(t, err, "Key is empty")
+		assert.Nil(t, publicKey)
+	})
+}