Remove usage of archived pkg/errors.

The repository github.com/pkg/errors is no longer maintained. Instead, the package is now part of the Go standard library (pkg.go.dev/errors) and further developed.

In this commit we refactor the usages of the errors package to reference the current version.

armor/armor.go

@@ -4,13 +4,13 @@ package armor
 
 import (
 	"bytes"
+	"fmt"
 	"io"
 	"io/ioutil"
 
 	"github.com/ProtonMail/go-crypto/openpgp/armor"
 	"github.com/ProtonMail/gopenpgp/v2/constants"
 	"github.com/ProtonMail/gopenpgp/v2/internal"
-	"github.com/pkg/errors"
 )
 
 // ArmorKey armors input as a public key.
@@ -46,7 +46,7 @@ func ArmorWithTypeAndCustomHeaders(input []byte, armorType, version, comment str
 func Unarmor(input string) ([]byte, error) {
 	b, err := internal.Unarmor(input)
 	if err != nil {
-		return nil, errors.Wrap(err, "gopengp: unable to unarmor")
+		return nil, fmt.Errorf("gopengp: unable to unarmor: %w", err)
 	}
 	return ioutil.ReadAll(b.Body)
 }
@@ -57,13 +57,13 @@ func armorWithTypeAndHeaders(input []byte, armorType string, headers map[string]
 	w, err := armor.Encode(&b, armorType, headers)
 
 	if err != nil {
-		return "", errors.Wrap(err, "gopengp: unable to encode armoring")
+		return "", fmt.Errorf("gopengp: unable to encode armoring: %w", err)
 	}
 	if _, err = w.Write(input); err != nil {
-		return "", errors.Wrap(err, "gopengp: unable to write armored to buffer")
+		return "", fmt.Errorf("gopengp: unable to write armored to buffer: %w", err)
 	}
 	if err := w.Close(); err != nil {
-		return "", errors.Wrap(err, "gopengp: unable to close armor buffer")
+		return "", fmt.Errorf("gopengp: unable to close armor buffer: %w", err)
 	}
 	return b.String(), nil
 }

crypto/attachment.go

@@ -2,6 +2,7 @@ package crypto
 
 import (
 	"bytes"
+	"fmt"
 	"io"
 	"io/ioutil"
 	"runtime"
@@ -10,7 +11,6 @@ import (
 
 	"github.com/ProtonMail/go-crypto/openpgp"
 	"github.com/ProtonMail/go-crypto/openpgp/packet"
-	"github.com/pkg/errors"
 )
 
 // AttachmentProcessor keeps track of the progress of encrypting an attachment
@@ -41,7 +41,7 @@ func (ap *AttachmentProcessor) Finish() (*PGPSplitMessage, error) {
 	}
 
 	if err := (*ap.w).Close(); err != nil {
-		return nil, errors.Wrap(err, "gopengpp: unable to close writer")
+		return nil, fmt.Errorf("gopengpp: unable to close writer: %w", err)
 	}
 
 	if ap.garbageCollector > 0 {
@@ -50,7 +50,7 @@ func (ap *AttachmentProcessor) Finish() (*PGPSplitMessage, error) {
 	}
 
 	if err := (*ap.pipe).Close(); err != nil {
-		return nil, errors.Wrap(err, "gopengpp: unable to close pipe")
+		return nil, fmt.Errorf("gopengpp: unable to close pipe: %w", err)
 	}
 
 	ap.done.Wait()
@@ -107,7 +107,7 @@ func (keyRing *KeyRing) newAttachmentProcessor(
 	var encryptErr error
 	ew, encryptErr = openpgp.Encrypt(writer, keyRing.entities, nil, hints, config)
 	if encryptErr != nil {
-		return nil, errors.Wrap(encryptErr, "gopengpp: unable to encrypt attachment")
+		return nil, fmt.Errorf("gopengpp: unable to encrypt attachment: %w", encryptErr)
 	}
 	attachmentProc.w = &ew
 	attachmentProc.pipe = writer
@@ -167,13 +167,13 @@ func (keyRing *KeyRing) DecryptAttachment(message *PGPSplitMessage) (*PlainMessa
 
 	md, err := openpgp.ReadMessage(encryptedReader, privKeyEntries, nil, config)
 	if err != nil {
-		return nil, errors.Wrap(err, "gopengpp: unable to read attachment")
+		return nil, fmt.Errorf("gopengpp: unable to read attachment: %w", err)
 	}
 
 	decrypted := md.UnverifiedBody
 	b, err := ioutil.ReadAll(decrypted)
 	if err != nil {
-		return nil, errors.Wrap(err, "gopengpp: unable to read attachment body")
+		return nil, fmt.Errorf("gopengpp: unable to read attachment body: %w", err)
 	}
 
 	return &PlainMessage{

crypto/attachment_manual.go

@@ -1,6 +1,8 @@
 package crypto
 
 import (
+	"errors"
+	"fmt"
 	"io"
 	"io/ioutil"
 	"runtime"
@@ -10,7 +12,6 @@ import (
 
 	"github.com/ProtonMail/go-crypto/openpgp"
 	"github.com/ProtonMail/go-crypto/openpgp/packet"
-	"github.com/pkg/errors"
 )
 
 // ManualAttachmentProcessor keeps track of the progress of encrypting an attachment
@@ -42,7 +43,10 @@ func (ap *ManualAttachmentProcessor) GetDataLength() int {
 func (ap *ManualAttachmentProcessor) Process(plainData []byte) error {
 	defer runtime.GC()
 	_, err := ap.plaintextWriter.Write(plainData)
-	return errors.Wrap(err, "gopenpgp: couldn't write attachment data")
+	if err != nil {
+		err = fmt.Errorf("gopenpgp: couldn't write attachment data: %w", err)
+	}
+	return err
 }
 
 // Finish tells the processor to finalize encryption.
@@ -52,10 +56,10 @@ func (ap *ManualAttachmentProcessor) Finish() error {
 		return ap.err
 	}
 	if err := ap.plaintextWriter.Close(); err != nil {
-		return errors.Wrap(err, "gopengpp: unable to close the plaintext writer")
+		return fmt.Errorf("gopengpp: unable to close the plaintext writer: %w", err)
 	}
 	if err := ap.ciphertextWriter.Close(); err != nil {
-		return errors.Wrap(err, "gopengpp: unable to close the dataPacket writer")
+		return fmt.Errorf("gopengpp: unable to close the dataPacket writer: %w", err)
 	}
 	ap.done.Wait()
 	if ap.err != nil {
@@ -130,15 +134,15 @@ func (keyRing *KeyRing) NewManualAttachmentProcessor(
 	var encryptErr error
 	ew, encryptErr = openpgp.EncryptSplit(keyWriter, dataWriter, keyRing.entities, nil, hints, config)
 	if encryptErr != nil {
-		return nil, errors.Wrap(encryptErr, "gopengpp: unable to encrypt attachment")
+		return nil, fmt.Errorf("gopengpp: unable to encrypt attachment: %w", encryptErr)
 	}
 
 	attachmentProc.plaintextWriter = ew
 	attachmentProc.ciphertextWriter = dataWriter
 
 	// The key packet should have been already written, so we can close
 	if err := keyWriter.Close(); err != nil {
-		return nil, errors.Wrap(err, "gopenpgp: couldn't close the keyPacket writer")
+		return nil, fmt.Errorf("gopenpgp: couldn't close the keyPacket writer: %w", err)
 	}
 
 	// Check if the goroutines encountered errors
@@ -171,7 +175,7 @@ func readAll(buffer []byte, reader io.Reader) (int, error) {
 			if errors.Is(err, io.EOF) {
 				break
 			}
-			return 0, errors.Wrap(err, "gopenpgp: couldn't read data from the encrypted reader")
+			return 0, fmt.Errorf("gopenpgp: couldn't read data from the encrypted reader: %w", err)
 		}
 		if offset == bufferLen {
 			// Here we've reached the end of the buffer

crypto/attachment_manual_test.go

@@ -2,10 +2,9 @@ package crypto
 
 import (
 	"bytes"
+	"errors"
 	"io"
 	"testing"
-
-	"github.com/pkg/errors"
 )
 
 func TestManualAttachmentProcessor(t *testing.T) {

crypto/key.go

@@ -5,6 +5,7 @@ import (
 	"crypto"
 	"crypto/sha256"
 	"encoding/hex"
+	"errors"
 	"fmt"
 	"io"
 	"math/big"
@@ -13,7 +14,6 @@ import (
 
 	"github.com/ProtonMail/gopenpgp/v2/armor"
 	"github.com/ProtonMail/gopenpgp/v2/constants"
-	"github.com/pkg/errors"
 
 	openpgp "github.com/ProtonMail/go-crypto/openpgp"
 	packet "github.com/ProtonMail/go-crypto/openpgp/packet"
@@ -117,14 +117,14 @@ func (key *Key) Lock(passphrase []byte) (*Key, error) {
 	if lockedKey.entity.PrivateKey != nil && !lockedKey.entity.PrivateKey.Dummy() {
 		err = lockedKey.entity.PrivateKey.Encrypt(passphrase)
 		if err != nil {
-			return nil, errors.Wrap(err, "gopenpgp: error in locking key")
+			return nil, fmt.Errorf("gopenpgp: error in locking key: %w", err)
 		}
 	}
 
 	for _, sub := range lockedKey.entity.Subkeys {
 		if sub.PrivateKey != nil && !sub.PrivateKey.Dummy() {
 			if err := sub.PrivateKey.Encrypt(passphrase); err != nil {
-				return nil, errors.Wrap(err, "gopenpgp: error in locking sub key")
+				return nil, fmt.Errorf("gopenpgp: error in locking sub key: %w", err)
 			}
 		}
 	}
@@ -162,14 +162,14 @@ func (key *Key) Unlock(passphrase []byte) (*Key, error) {
 	if unlockedKey.entity.PrivateKey != nil && !unlockedKey.entity.PrivateKey.Dummy() {
 		err = unlockedKey.entity.PrivateKey.Decrypt(passphrase)
 		if err != nil {
-			return nil, errors.Wrap(err, "gopenpgp: error in unlocking key")
+			return nil, fmt.Errorf("gopenpgp: error in unlocking key: %w", err)
 		}
 	}
 
 	for _, sub := range unlockedKey.entity.Subkeys {
 		if sub.PrivateKey != nil && !sub.PrivateKey.Dummy() {
 			if err := sub.PrivateKey.Decrypt(passphrase); err != nil {
-				return nil, errors.Wrap(err, "gopenpgp: error in unlocking sub key")
+				return nil, fmt.Errorf("gopenpgp: error in unlocking sub key: %w", err)
 			}
 		}
 	}
@@ -198,7 +198,7 @@ func (key *Key) Serialize() ([]byte, error) {
 	}
 
 	if err != nil {
-		return nil, errors.Wrap(err, "gopenpgp: error in serializing key")
+		return nil, fmt.Errorf("gopenpgp: error in serializing key: %w", err)
 	}
 
 	return buffer.Bytes(), nil
@@ -254,7 +254,7 @@ func (key *Key) GetArmoredPublicKeyWithCustomHeaders(comment, version string) (s
 func (key *Key) GetPublicKey() (b []byte, err error) {
 	var outBuf bytes.Buffer
 	if err = key.entity.Serialize(&outBuf); err != nil {
-		return nil, errors.Wrap(err, "gopenpgp: error in serializing public key")
+		return nil, fmt.Errorf("gopenpgp: error in serializing public key: %w", err)
 	}
 
 	return outBuf.Bytes(), nil
@@ -417,7 +417,7 @@ func (key *Key) readFrom(r io.Reader, armored bool) error {
 		entities, err = openpgp.ReadKeyRing(r)
 	}
 	if err != nil {
-		return errors.Wrap(err, "gopenpgp: error in reading key ring")
+		return fmt.Errorf("gopenpgp: error in reading key ring: %w", err)
 	}
 
 	if len(entities) > 1 {
@@ -439,7 +439,7 @@ func generateKey(
 	prime1, prime2, prime3, prime4 []byte,
 ) (*Key, error) {
 	if len(email) == 0 && len(name) == 0 {
-		return nil, errors.New("gopenpgp: neither name nor email set.")
+		return nil, errors.New("gopenpgp: neither name nor email set")
 	}
 
 	comments := ""
@@ -473,7 +473,7 @@ func generateKey(
 
 	newEntity, err := openpgp.NewEntity(name, comments, email, cfg)
 	if err != nil {
-		return nil, errors.Wrap(err, "gopengpp: error in encoding new entity")
+		return nil, fmt.Errorf("gopengpp: error in encoding new entity: %w", err)
 	}
 
 	if newEntity.PrivateKey == nil {

crypto/keyring.go

@@ -2,11 +2,12 @@ package crypto
 
 import (
 	"bytes"
+	"errors"
+	"fmt"
 	"time"
 
 	"github.com/ProtonMail/go-crypto/openpgp"
 	"github.com/ProtonMail/go-crypto/openpgp/packet"
-	"github.com/pkg/errors"
 )
 
 // KeyRing contains multiple private and public keys.
@@ -220,14 +221,14 @@ func (keyRing *KeyRing) Copy() (*KeyRing, error) {
 		}
 
 		if err != nil {
-			return nil, errors.Wrap(err, "gopenpgp: unable to copy key: error in serializing entity")
+			return nil, fmt.Errorf("gopenpgp: unable to copy key: error in serializing entity: %w", err)
 		}
 
 		bt := buffer.Bytes()
 		entities[id], err = openpgp.ReadEntity(packet.NewReader(bytes.NewReader(bt)))
 
 		if err != nil {
-			return nil, errors.Wrap(err, "gopenpgp: unable to copy key: error in reading entity")
+			return nil, fmt.Errorf("gopenpgp: unable to copy key: error in reading entity: %w", err)
 		}
 	}
 	newKeyRing.entities = entities

crypto/keyring_message.go

@@ -2,14 +2,15 @@ package crypto
 
 import (
 	"bytes"
+	"errors"
+	"fmt"
 	"io"
 	"io/ioutil"
 	"time"
 
 	"github.com/ProtonMail/go-crypto/openpgp"
 	"github.com/ProtonMail/go-crypto/openpgp/packet"
 	"github.com/ProtonMail/gopenpgp/v2/constants"
-	"github.com/pkg/errors"
 )
 
 // Encrypt encrypts a PlainMessage, outputs a PGPMessage.
@@ -219,12 +220,12 @@ func asymmetricEncrypt(
 
 	_, err = encryptWriter.Write(plainMessage.GetBinary())
 	if err != nil {
-		return nil, errors.Wrap(err, "gopenpgp: error in writing to message")
+		return nil, fmt.Errorf("gopenpgp: error in writing to message: %w", err)
 	}
 
 	err = encryptWriter.Close()
 	if err != nil {
-		return nil, errors.Wrap(err, "gopenpgp: error in closing message")
+		return nil, fmt.Errorf("gopenpgp: error in closing message: %w", err)
 	}
 
 	return &PGPMessage{outBuf.Bytes()}, nil
@@ -268,7 +269,7 @@ func asymmetricEncryptStream(
 		encryptWriter, err = openpgp.EncryptTextSplit(keyPacketWriter, dataPacketWriter, publicKey.entities, signEntity, hints, config)
 	}
 	if err != nil {
-		return nil, errors.Wrap(err, "gopenpgp: error in encrypting asymmetrically")
+		return nil, fmt.Errorf("gopenpgp: error in encrypting asymmetrically: %w", err)
 	}
 	return encryptWriter, nil
 }
@@ -294,7 +295,7 @@ func asymmetricDecrypt(
 
 	body, err := ioutil.ReadAll(messageDetails.UnverifiedBody)
 	if err != nil {
-		return nil, errors.Wrap(err, "gopenpgp: error in reading message body")
+		return nil, fmt.Errorf("gopenpgp: error in reading message body: %w", err)
 	}
 
 	if verifyKey != nil {
@@ -349,7 +350,7 @@ func asymmetricDecryptStream(
 
 	messageDetails, err = openpgp.ReadMessage(encryptedIO, privKeyEntries, nil, config)
 	if err != nil {
-		return nil, errors.Wrap(err, "gopenpgp: error in reading message")
+		return nil, fmt.Errorf("gopenpgp: error in reading message: %w", err)
 	}
 	return messageDetails, err
 }