1 files changed, 0 insertions, 95 deletions
diff --git a/vendor/golang.org/x/crypto/hkdf/hkdf.go b/vendor/golang.org/x/crypto/hkdf/hkdf.go
deleted file mode 100644
index 3bee66294..000000000
--- a/vendor/golang.org/x/crypto/hkdf/hkdf.go
+++ /dev/null
@@ -1,95 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package hkdf implements the HMAC-based Extract-and-Expand Key Derivation
-// Function (HKDF) as defined in RFC 5869.
-//
-// HKDF is a cryptographic key derivation function (KDF) with the goal of
-// expanding limited input keying material into one or more cryptographically
-// strong secret keys.
-package hkdf
-
-import (
-	"crypto/hmac"
-	"errors"
-	"hash"
-	"io"
-)
-
-// Extract generates a pseudorandom key for use with Expand from an input secret
-// and an optional independent salt.
-//
-// Only use this function if you need to reuse the extracted key with multiple
-// Expand invocations and different context values. Most common scenarios,
-// including the generation of multiple keys, should use New instead.
-func Extract(hash func() hash.Hash, secret, salt []byte) []byte {
-	if salt == nil {
-		salt = make([]byte, hash().Size())
-	}
-	extractor := hmac.New(hash, salt)
-	extractor.Write(secret)
-	return extractor.Sum(nil)
-}
-
-type hkdf struct {
-	expander hash.Hash
-	size     int
-
-	info    []byte
-	counter byte
-
-	prev []byte
-	buf  []byte
-}
-
-func (f *hkdf) Read(p []byte) (int, error) {
-	// Check whether enough data can be generated
-	need := len(p)
-	remains := len(f.buf) + int(255-f.counter+1)*f.size
-	if remains < need {
-		return 0, errors.New("hkdf: entropy limit reached")
-	}
-	// Read any leftover from the buffer
-	n := copy(p, f.buf)
-	p = p[n:]
-
-	// Fill the rest of the buffer
-	for len(p) > 0 {
-		if f.counter > 1 {
-			f.expander.Reset()
-		}
-		f.expander.Write(f.prev)
-		f.expander.Write(f.info)
-		f.expander.Write([]byte{f.counter})
-		f.prev = f.expander.Sum(f.prev[:0])
-		f.counter++
-
-		// Copy the new batch into p
-		f.buf = f.prev
-		n = copy(p, f.buf)
-		p = p[n:]
-	}
-	// Save leftovers for next run
-	f.buf = f.buf[n:]
-
-	return need, nil
-}
-
-// Expand returns a Reader, from which keys can be read, using the given
-// pseudorandom key and optional context info, skipping the extraction step.
-//
-// The pseudorandomKey should have been generated by Extract, or be a uniformly
-// random or pseudorandom cryptographically strong key. See RFC 5869, Section
-// 3.3. Most common scenarios will want to use New instead.
-func Expand(hash func() hash.Hash, pseudorandomKey, info []byte) io.Reader {
-	expander := hmac.New(hash, pseudorandomKey)
-	return &hkdf{expander, expander.Size(), info, 1, nil, nil}
-}
-
-// New returns a Reader, from which keys can be read, using the given hash,
-// secret, salt and context info. Salt and info can be nil.
-func New(hash func() hash.Hash, secret, salt, info []byte) io.Reader {
-	prk := Extract(hash, secret, salt)
-	return Expand(hash, prk, info)
-}