fix: shared renamed to pkg, formatting changes

pkg/plugin/implementation/signer/cmd/plugin.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"context"
+	"errors"
+
+	"github.com/beckn/beckn-onix/pkg/plugin/definition"
+	"github.com/beckn/beckn-onix/pkg/plugin/implementation/signer"
+)
+
+// SignerProvider implements the definition.SignerProvider interface.
+type SignerProvider struct{}
+
+// New creates a new Signer instance using the provided configuration.
+func (p SignerProvider) New(ctx context.Context, config map[string]string) (definition.Signer, func() error, error) {
+	if ctx == nil {
+		return nil, nil, errors.New("context cannot be nil")
+	}
+
+	return signer.New(ctx, &signer.Config{})
+}
+
+// Provider is the exported symbol that the plugin manager will look for.
+var Provider definition.SignerProvider = SignerProvider{}

pkg/plugin/implementation/signer/cmd/plugin_test.go

@@ -0,0 +1,101 @@
+package main
+
+import (
+	"context"
+	"testing"
+)
+
+// TestSignerProviderSuccess verifies successful scenarios for SignerProvider.
+func TestSignerProviderSuccess(t *testing.T) {
+	provider := SignerProvider{}
+
+	successTests := []struct {
+		name   string
+		ctx    context.Context
+		config map[string]string
+	}{
+		{
+			name:   "Valid Config",
+			ctx:    context.Background(),
+			config: map[string]string{},
+		},
+		{
+			name:   "Unexpected Config Key",
+			ctx:    context.Background(),
+			config: map[string]string{"unexpected_key": "some_value"},
+		},
+		{
+			name:   "Empty Config",
+			ctx:    context.Background(),
+			config: map[string]string{},
+		},
+		{
+			name:   "Config with empty TTL",
+			ctx:    context.Background(),
+			config: map[string]string{"ttl": ""},
+		},
+		{
+			name:   "Config with negative TTL",
+			ctx:    context.Background(),
+			config: map[string]string{"ttl": "-100"},
+		},
+		{
+			name:   "Config with non-numeric TTL",
+			ctx:    context.Background(),
+			config: map[string]string{"ttl": "not_a_number"},
+		},
+	}
+
+	for _, tt := range successTests {
+		t.Run(tt.name, func(t *testing.T) {
+			signer, close, err := provider.New(tt.ctx, tt.config)
+
+			if err != nil {
+				t.Fatalf("Test %q failed: expected no error, but got: %v", tt.name, err)
+			}
+			if signer == nil {
+				t.Fatalf("Test %q failed: signer instance should not be nil", tt.name)
+			}
+			if close != nil {
+				if err := close(); err != nil {
+					t.Fatalf("Cleanup function returned an error: %v", err)
+				}
+			}
+		})
+	}
+}
+
+// TestSignerProviderFailure verifies failure scenarios for SignerProvider.
+func TestSignerProviderFailure(t *testing.T) {
+	provider := SignerProvider{}
+
+	failureTests := []struct {
+		name    string
+		ctx     context.Context
+		config  map[string]string
+		wantErr bool
+	}{
+		{
+			name:    "Nil Context",
+			ctx:     nil,
+			config:  map[string]string{},
+			wantErr: true,
+		},
+	}
+
+	for _, tt := range failureTests {
+		t.Run(tt.name, func(t *testing.T) {
+			signerInstance, close, err := provider.New(tt.ctx, tt.config)
+
+			if (err != nil) != tt.wantErr {
+				t.Fatalf("Test %q failed: expected error: %v, got: %v", tt.name, tt.wantErr, err)
+			}
+			if signerInstance != nil {
+				t.Fatalf("Test %q failed: expected signer instance to be nil", tt.name)
+			}
+			if close != nil {
+				t.Fatalf("Test %q failed: expected cleanup function to be nil", tt.name)
+			}
+		})
+	}
+}

pkg/plugin/implementation/signer/signer.go

@@ -0,0 +1,77 @@
+package signer
+
+import (
+	"context"
+	"crypto/ed25519"
+	"encoding/base64"
+	"errors"
+	"fmt"
+
+	"golang.org/x/crypto/blake2b"
+)
+
+// Config holds the configuration for the signing process.
+type Config struct {
+}
+
+// Signer implements the Signer interface and handles the signing process.
+type Signer struct {
+	config *Config
+}
+
+// New creates a new Signer instance with the given configuration.
+func New(ctx context.Context, config *Config) (*Signer, func() error, error) {
+	s := &Signer{config: config}
+
+	return s, s.Close, nil
+}
+
+// hash generates a signing string using BLAKE-512 hashing.
+func hash(payload []byte, createdAt, expiresAt int64) (string, error) {
+	hasher, _ := blake2b.New512(nil)
+
+	_, err := hasher.Write(payload)
+	if err != nil {
+		return "", fmt.Errorf("failed to hash payload: %w", err)
+	}
+
+	hashSum := hasher.Sum(nil)
+	digestB64 := base64.StdEncoding.EncodeToString(hashSum)
+
+	return fmt.Sprintf("(created): %d\n(expires): %d\ndigest: BLAKE-512=%s", createdAt, expiresAt, digestB64), nil
+}
+
+// generateSignature signs the given signing string using the provided private key.
+func generateSignature(signingString []byte, privateKeyBase64 string) ([]byte, error) {
+	privateKeyBytes, err := base64.StdEncoding.DecodeString(privateKeyBase64)
+	if err != nil {
+		return nil, fmt.Errorf("error decoding private key: %w", err)
+	}
+
+	if len(privateKeyBytes) != ed25519.PrivateKeySize {
+		return nil, errors.New("invalid private key length")
+	}
+
+	privateKey := ed25519.PrivateKey(privateKeyBytes)
+	return ed25519.Sign(privateKey, signingString), nil
+}
+
+// Sign generates a digital signature for the provided payload.
+func (s *Signer) Sign(ctx context.Context, body []byte, privateKeyBase64 string, createdAt, expiresAt int64) (string, error) {
+	signingString, err := hash(body, createdAt, expiresAt)
+	if err != nil {
+		return "", err
+	}
+
+	signature, err := generateSignature([]byte(signingString), privateKeyBase64)
+	if err != nil {
+		return "", err
+	}
+
+	return base64.StdEncoding.EncodeToString(signature), nil
+}
+
+// Close releases resources (mock implementation returning nil).
+func (s *Signer) Close() error {
+	return nil
+}

pkg/plugin/implementation/signer/signer_test.go

@@ -0,0 +1,104 @@
+package signer
+
+import (
+	"context"
+	"crypto/ed25519"
+	"encoding/base64"
+	"strings"
+	"testing"
+	"time"
+)
+
+// generateTestKeys generates a test private and public key pair in base64 encoding.
+func generateTestKeys() (string, string) {
+	publicKey, privateKey, _ := ed25519.GenerateKey(nil)
+	return base64.StdEncoding.EncodeToString(privateKey), base64.StdEncoding.EncodeToString(publicKey)
+}
+
+// TestSignSuccess tests the Sign method with valid inputs to ensure it produces a valid signature.
+func TestSignSuccess(t *testing.T) {
+	privateKey, _ := generateTestKeys()
+	config := Config{}
+	signer, close, _ := New(context.Background(), &config)
+
+	successTests := []struct {
+		name       string
+		payload    []byte
+		privateKey string
+		createdAt  int64
+		expiresAt  int64
+	}{
+		{
+			name:       "Valid Signing",
+			payload:    []byte("test payload"),
+			privateKey: privateKey,
+			createdAt:  time.Now().Unix(),
+			expiresAt:  time.Now().Unix() + 3600,
+		},
+	}
+
+	for _, tt := range successTests {
+		t.Run(tt.name, func(t *testing.T) {
+			signature, err := signer.Sign(context.Background(), tt.payload, tt.privateKey, tt.createdAt, tt.expiresAt)
+			if err != nil {
+				t.Errorf("unexpected error: %v", err)
+			}
+			if len(signature) == 0 {
+				t.Errorf("expected a non-empty signature, but got empty")
+			}
+			if close != nil {
+				if err := close(); err != nil {
+					t.Fatalf("Cleanup function returned an error: %v", err)
+				}
+			}
+		})
+	}
+}
+
+// TestSignFailure tests the Sign method with invalid inputs to ensure proper error handling.
+func TestSignFailure(t *testing.T) {
+	config := Config{}
+	signer, close, _ := New(context.Background(), &config)
+
+	failureTests := []struct {
+		name            string
+		payload         []byte
+		privateKey      string
+		createdAt       int64
+		expiresAt       int64
+		expectErrString string
+	}{
+		{
+			name:            "Invalid Private Key",
+			payload:         []byte("test payload"),
+			privateKey:      "invalid_key",
+			createdAt:       time.Now().Unix(),
+			expiresAt:       time.Now().Unix() + 3600,
+			expectErrString: "error decoding private key",
+		},
+		{
+			name:            "Short Private Key",
+			payload:         []byte("test payload"),
+			privateKey:      base64.StdEncoding.EncodeToString([]byte("short_key")),
+			createdAt:       time.Now().Unix(),
+			expiresAt:       time.Now().Unix() + 3600,
+			expectErrString: "invalid private key length",
+		},
+	}
+
+	for _, tt := range failureTests {
+		t.Run(tt.name, func(t *testing.T) {
+			_, err := signer.Sign(context.Background(), tt.payload, tt.privateKey, tt.createdAt, tt.expiresAt)
+			if err == nil {
+				t.Errorf("expected error but got none")
+			} else if !strings.Contains(err.Error(), tt.expectErrString) {
+				t.Errorf("expected error message to contain %q, got %v", tt.expectErrString, err)
+			}
+			if close != nil {
+				if err := close(); err != nil {
+					t.Fatalf("Cleanup function returned an error: %v", err)
+				}
+			}
+		})
+	}
+}