From 6d8f122a5160f6d9e4c51579f2429dfaa62c7271 Mon Sep 17 00:00:00 2001 From: Christopher Speller Date: Fri, 16 Feb 2018 06:47:51 -0800 Subject: Upgrading server dependancies (#8308) --- .../gopkg.in/square/go-jose.v1/cipher/cbc_hmac.go | 196 --------------------- 1 file changed, 196 deletions(-) delete mode 100644 vendor/gopkg.in/square/go-jose.v1/cipher/cbc_hmac.go (limited to 'vendor/gopkg.in/square/go-jose.v1/cipher/cbc_hmac.go') diff --git a/vendor/gopkg.in/square/go-jose.v1/cipher/cbc_hmac.go b/vendor/gopkg.in/square/go-jose.v1/cipher/cbc_hmac.go deleted file mode 100644 index 126b85ce2..000000000 --- a/vendor/gopkg.in/square/go-jose.v1/cipher/cbc_hmac.go +++ /dev/null @@ -1,196 +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 josecipher - -import ( - "bytes" - "crypto/cipher" - "crypto/hmac" - "crypto/sha256" - "crypto/sha512" - "crypto/subtle" - "encoding/binary" - "errors" - "hash" -) - -const ( - nonceBytes = 16 -) - -// NewCBCHMAC instantiates a new AEAD based on CBC+HMAC. -func NewCBCHMAC(key []byte, newBlockCipher func([]byte) (cipher.Block, error)) (cipher.AEAD, error) { - keySize := len(key) / 2 - integrityKey := key[:keySize] - encryptionKey := key[keySize:] - - blockCipher, err := newBlockCipher(encryptionKey) - if err != nil { - return nil, err - } - - var hash func() hash.Hash - switch keySize { - case 16: - hash = sha256.New - case 24: - hash = sha512.New384 - case 32: - hash = sha512.New - } - - return &cbcAEAD{ - hash: hash, - blockCipher: blockCipher, - authtagBytes: keySize, - integrityKey: integrityKey, - }, nil -} - -// An AEAD based on CBC+HMAC -type cbcAEAD struct { - hash func() hash.Hash - authtagBytes int - integrityKey []byte - blockCipher cipher.Block -} - -func (ctx *cbcAEAD) NonceSize() int { - return nonceBytes -} - -func (ctx *cbcAEAD) Overhead() int { - // Maximum overhead is block size (for padding) plus auth tag length, where - // the length of the auth tag is equivalent to the key size. - return ctx.blockCipher.BlockSize() + ctx.authtagBytes -} - -// Seal encrypts and authenticates the plaintext. -func (ctx *cbcAEAD) Seal(dst, nonce, plaintext, data []byte) []byte { - // Output buffer -- must take care not to mangle plaintext input. - ciphertext := make([]byte, uint64(len(plaintext))+uint64(ctx.Overhead()))[:len(plaintext)] - copy(ciphertext, plaintext) - ciphertext = padBuffer(ciphertext, ctx.blockCipher.BlockSize()) - - cbc := cipher.NewCBCEncrypter(ctx.blockCipher, nonce) - - cbc.CryptBlocks(ciphertext, ciphertext) - authtag := ctx.computeAuthTag(data, nonce, ciphertext) - - ret, out := resize(dst, uint64(len(dst))+uint64(len(ciphertext))+uint64(len(authtag))) - copy(out, ciphertext) - copy(out[len(ciphertext):], authtag) - - return ret -} - -// Open decrypts and authenticates the ciphertext. -func (ctx *cbcAEAD) Open(dst, nonce, ciphertext, data []byte) ([]byte, error) { - if len(ciphertext) < ctx.authtagBytes { - return nil, errors.New("square/go-jose: invalid ciphertext (too short)") - } - - offset := len(ciphertext) - ctx.authtagBytes - expectedTag := ctx.computeAuthTag(data, nonce, ciphertext[:offset]) - match := subtle.ConstantTimeCompare(expectedTag, ciphertext[offset:]) - if match != 1 { - return nil, errors.New("square/go-jose: invalid ciphertext (auth tag mismatch)") - } - - cbc := cipher.NewCBCDecrypter(ctx.blockCipher, nonce) - - // Make copy of ciphertext buffer, don't want to modify in place - buffer := append([]byte{}, []byte(ciphertext[:offset])...) - - if len(buffer)%ctx.blockCipher.BlockSize() > 0 { - return nil, errors.New("square/go-jose: invalid ciphertext (invalid length)") - } - - cbc.CryptBlocks(buffer, buffer) - - // Remove padding - plaintext, err := unpadBuffer(buffer, ctx.blockCipher.BlockSize()) - if err != nil { - return nil, err - } - - ret, out := resize(dst, uint64(len(dst))+uint64(len(plaintext))) - copy(out, plaintext) - - return ret, nil -} - -// Compute an authentication tag -func (ctx *cbcAEAD) computeAuthTag(aad, nonce, ciphertext []byte) []byte { - buffer := make([]byte, uint64(len(aad))+uint64(len(nonce))+uint64(len(ciphertext))+8) - n := 0 - n += copy(buffer, aad) - n += copy(buffer[n:], nonce) - n += copy(buffer[n:], ciphertext) - binary.BigEndian.PutUint64(buffer[n:], uint64(len(aad))*8) - - // According to documentation, Write() on hash.Hash never fails. - hmac := hmac.New(ctx.hash, ctx.integrityKey) - _, _ = hmac.Write(buffer) - - return hmac.Sum(nil)[:ctx.authtagBytes] -} - -// resize ensures the the given slice has a capacity of at least n bytes. -// If the capacity of the slice is less than n, a new slice is allocated -// and the existing data will be copied. -func resize(in []byte, n uint64) (head, tail []byte) { - if uint64(cap(in)) >= n { - head = in[:n] - } else { - head = make([]byte, n) - copy(head, in) - } - - tail = head[len(in):] - return -} - -// Apply padding -func padBuffer(buffer []byte, blockSize int) []byte { - missing := blockSize - (len(buffer) % blockSize) - ret, out := resize(buffer, uint64(len(buffer))+uint64(missing)) - padding := bytes.Repeat([]byte{byte(missing)}, missing) - copy(out, padding) - return ret -} - -// Remove padding -func unpadBuffer(buffer []byte, blockSize int) ([]byte, error) { - if len(buffer)%blockSize != 0 { - return nil, errors.New("square/go-jose: invalid padding") - } - - last := buffer[len(buffer)-1] - count := int(last) - - if count == 0 || count > blockSize || count > len(buffer) { - return nil, errors.New("square/go-jose: invalid padding") - } - - padding := bytes.Repeat([]byte{last}, count) - if !bytes.HasSuffix(buffer, padding) { - return nil, errors.New("square/go-jose: invalid padding") - } - - return buffer[:len(buffer)-count], nil -} -- cgit v1.2.3-1-g7c22