1 files changed, 0 insertions, 360 deletions
diff --git a/vendor/gopkg.in/square/go-jose.v2/symmetric.go b/vendor/gopkg.in/square/go-jose.v2/symmetric.go
deleted file mode 100644
index 5be00f925..000000000
--- a/vendor/gopkg.in/square/go-jose.v2/symmetric.go
+++ /dev/null
@@ -1,360 +0,0 @@
-/*-
- * Copyright 2014 Square Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package jose
-
-import (
-	"crypto/aes"
-	"crypto/cipher"
-	"crypto/hmac"
-	"crypto/rand"
-	"crypto/sha256"
-	"crypto/sha512"
-	"crypto/subtle"
-	"errors"
-	"fmt"
-	"hash"
-	"io"
-
-	"gopkg.in/square/go-jose.v2/cipher"
-)
-
-// Random reader (stubbed out in tests)
-var randReader = rand.Reader
-
-// Dummy key cipher for shared symmetric key mode
-type symmetricKeyCipher struct {
-	key []byte // Pre-shared content-encryption key
-}
-
-// Signer/verifier for MAC modes
-type symmetricMac struct {
-	key []byte
-}
-
-// Input/output from an AEAD operation
-type aeadParts struct {
-	iv, ciphertext, tag []byte
-}
-
-// A content cipher based on an AEAD construction
-type aeadContentCipher struct {
-	keyBytes     int
-	authtagBytes int
-	getAead      func(key []byte) (cipher.AEAD, error)
-}
-
-// Random key generator
-type randomKeyGenerator struct {
-	size int
-}
-
-// Static key generator
-type staticKeyGenerator struct {
-	key []byte
-}
-
-// Create a new content cipher based on AES-GCM
-func newAESGCM(keySize int) contentCipher {
-	return &aeadContentCipher{
-		keyBytes:     keySize,
-		authtagBytes: 16,
-		getAead: func(key []byte) (cipher.AEAD, error) {
-			aes, err := aes.NewCipher(key)
-			if err != nil {
-				return nil, err
-			}
-
-			return cipher.NewGCM(aes)
-		},
-	}
-}
-
-// Create a new content cipher based on AES-CBC+HMAC
-func newAESCBC(keySize int) contentCipher {
-	return &aeadContentCipher{
-		keyBytes:     keySize * 2,
-		authtagBytes: 16,
-		getAead: func(key []byte) (cipher.AEAD, error) {
-			return josecipher.NewCBCHMAC(key, aes.NewCipher)
-		},
-	}
-}
-
-// Get an AEAD cipher object for the given content encryption algorithm
-func getContentCipher(alg ContentEncryption) contentCipher {
-	switch alg {
-	case A128GCM:
-		return newAESGCM(16)
-	case A192GCM:
-		return newAESGCM(24)
-	case A256GCM:
-		return newAESGCM(32)
-	case A128CBC_HS256:
-		return newAESCBC(16)
-	case A192CBC_HS384:
-		return newAESCBC(24)
-	case A256CBC_HS512:
-		return newAESCBC(32)
-	default:
-		return nil
-	}
-}
-
-// newSymmetricRecipient creates a JWE encrypter based on AES-GCM key wrap.
-func newSymmetricRecipient(keyAlg KeyAlgorithm, key []byte) (recipientKeyInfo, error) {
-	switch keyAlg {
-	case DIRECT, A128GCMKW, A192GCMKW, A256GCMKW, A128KW, A192KW, A256KW:
-	default:
-		return recipientKeyInfo{}, ErrUnsupportedAlgorithm
-	}
-
-	return recipientKeyInfo{
-		keyAlg: keyAlg,
-		keyEncrypter: &symmetricKeyCipher{
-			key: key,
-		},
-	}, nil
-}
-
-// newSymmetricSigner creates a recipientSigInfo based on the given key.
-func newSymmetricSigner(sigAlg SignatureAlgorithm, key []byte) (recipientSigInfo, error) {
-	// Verify that key management algorithm is supported by this encrypter
-	switch sigAlg {
-	case HS256, HS384, HS512:
-	default:
-		return recipientSigInfo{}, ErrUnsupportedAlgorithm
-	}
-
-	return recipientSigInfo{
-		sigAlg: sigAlg,
-		signer: &symmetricMac{
-			key: key,
-		},
-	}, nil
-}
-
-// Generate a random key for the given content cipher
-func (ctx randomKeyGenerator) genKey() ([]byte, rawHeader, error) {
-	key := make([]byte, ctx.size)
-	_, err := io.ReadFull(randReader, key)
-	if err != nil {
-		return nil, rawHeader{}, err
-	}
-
-	return key, rawHeader{}, nil
-}
-
-// Key size for random generator
-func (ctx randomKeyGenerator) keySize() int {
-	return ctx.size
-}
-
-// Generate a static key (for direct mode)
-func (ctx staticKeyGenerator) genKey() ([]byte, rawHeader, error) {
-	cek := make([]byte, len(ctx.key))
-	copy(cek, ctx.key)
-	return cek, rawHeader{}, nil
-}
-
-// Key size for static generator
-func (ctx staticKeyGenerator) keySize() int {
-	return len(ctx.key)
-}
-
-// Get key size for this cipher
-func (ctx aeadContentCipher) keySize() int {
-	return ctx.keyBytes
-}
-
-// Encrypt some data
-func (ctx aeadContentCipher) encrypt(key, aad, pt []byte) (*aeadParts, error) {
-	// Get a new AEAD instance
-	aead, err := ctx.getAead(key)
-	if err != nil {
-		return nil, err
-	}
-
-	// Initialize a new nonce
-	iv := make([]byte, aead.NonceSize())
-	_, err = io.ReadFull(randReader, iv)
-	if err != nil {
-		return nil, err
-	}
-
-	ciphertextAndTag := aead.Seal(nil, iv, pt, aad)
-	offset := len(ciphertextAndTag) - ctx.authtagBytes
-
-	return &aeadParts{
-		iv:         iv,
-		ciphertext: ciphertextAndTag[:offset],
-		tag:        ciphertextAndTag[offset:],
-	}, nil
-}
-
-// Decrypt some data
-func (ctx aeadContentCipher) decrypt(key, aad []byte, parts *aeadParts) ([]byte, error) {
-	aead, err := ctx.getAead(key)
-	if err != nil {
-		return nil, err
-	}
-
-	return aead.Open(nil, parts.iv, append(parts.ciphertext, parts.tag...), aad)
-}
-
-// Encrypt the content encryption key.
-func (ctx *symmetricKeyCipher) encryptKey(cek []byte, alg KeyAlgorithm) (recipientInfo, error) {
-	switch alg {
-	case DIRECT:
-		return recipientInfo{
-			header: &rawHeader{},
-		}, nil
-	case A128GCMKW, A192GCMKW, A256GCMKW:
-		aead := newAESGCM(len(ctx.key))
-
-		parts, err := aead.encrypt(ctx.key, []byte{}, cek)
-		if err != nil {
-			return recipientInfo{}, err
-		}
-
-		header := &rawHeader{}
-		header.set(headerIV, newBuffer(parts.iv))
-		header.set(headerTag, newBuffer(parts.tag))
-
-		return recipientInfo{
-			header:       header,
-			encryptedKey: parts.ciphertext,
-		}, nil
-	case A128KW, A192KW, A256KW:
-		block, err := aes.NewCipher(ctx.key)
-		if err != nil {
-			return recipientInfo{}, err
-		}
-
-		jek, err := josecipher.KeyWrap(block, cek)
-		if err != nil {
-			return recipientInfo{}, err
-		}
-
-		return recipientInfo{
-			encryptedKey: jek,
-			header:       &rawHeader{},
-		}, nil
-	}
-
-	return recipientInfo{}, ErrUnsupportedAlgorithm
-}
-
-// Decrypt the content encryption key.
-func (ctx *symmetricKeyCipher) decryptKey(headers rawHeader, recipient *recipientInfo, generator keyGenerator) ([]byte, error) {
-	switch headers.getAlgorithm() {
-	case DIRECT:
-		cek := make([]byte, len(ctx.key))
-		copy(cek, ctx.key)
-		return cek, nil
-	case A128GCMKW, A192GCMKW, A256GCMKW:
-		aead := newAESGCM(len(ctx.key))
-
-		iv, err := headers.getIV()
-		if err != nil {
-			return nil, fmt.Errorf("square/go-jose: invalid IV: %v", err)
-		}
-		tag, err := headers.getTag()
-		if err != nil {
-			return nil, fmt.Errorf("square/go-jose: invalid tag: %v", err)
-		}
-
-		parts := &aeadParts{
-			iv:         iv.bytes(),
-			ciphertext: recipient.encryptedKey,
-			tag:        tag.bytes(),
-		}
-
-		cek, err := aead.decrypt(ctx.key, []byte{}, parts)
-		if err != nil {
-			return nil, err
-		}
-
-		return cek, nil
-	case A128KW, A192KW, A256KW:
-		block, err := aes.NewCipher(ctx.key)
-		if err != nil {
-			return nil, err
-		}
-
-		cek, err := josecipher.KeyUnwrap(block, recipient.encryptedKey)
-		if err != nil {
-			return nil, err
-		}
-		return cek, nil
-	}
-
-	return nil, ErrUnsupportedAlgorithm
-}
-
-// Sign the given payload
-func (ctx symmetricMac) signPayload(payload []byte, alg SignatureAlgorithm) (Signature, error) {
-	mac, err := ctx.hmac(payload, alg)
-	if err != nil {
-		return Signature{}, errors.New("square/go-jose: failed to compute hmac")
-	}
-
-	return Signature{
-		Signature: mac,
-		protected: &rawHeader{},
-	}, nil
-}
-
-// Verify the given payload
-func (ctx symmetricMac) verifyPayload(payload []byte, mac []byte, alg SignatureAlgorithm) error {
-	expected, err := ctx.hmac(payload, alg)
-	if err != nil {
-		return errors.New("square/go-jose: failed to compute hmac")
-	}
-
-	if len(mac) != len(expected) {
-		return errors.New("square/go-jose: invalid hmac")
-	}
-
-	match := subtle.ConstantTimeCompare(mac, expected)
-	if match != 1 {
-		return errors.New("square/go-jose: invalid hmac")
-	}
-
-	return nil
-}
-
-// Compute the HMAC based on the given alg value
-func (ctx symmetricMac) hmac(payload []byte, alg SignatureAlgorithm) ([]byte, error) {
-	var hash func() hash.Hash
-
-	switch alg {
-	case HS256:
-		hash = sha256.New
-	case HS384:
-		hash = sha512.New384
-	case HS512:
-		hash = sha512.New
-	default:
-		return nil, ErrUnsupportedAlgorithm
-	}
-
-	hmac := hmac.New(hash, ctx.key)
-
-	// According to documentation, Write() on hash never fails
-	_, _ = hmac.Write(payload)
-	return hmac.Sum(nil), nil
-}