1 files changed, 0 insertions, 273 deletions
diff --git a/vendor/github.com/miekg/dns/vendor/golang.org/x/crypto/openpgp/s2k/s2k.go b/vendor/github.com/miekg/dns/vendor/golang.org/x/crypto/openpgp/s2k/s2k.go
deleted file mode 100644
index 4b9a44ca2..000000000
--- a/vendor/github.com/miekg/dns/vendor/golang.org/x/crypto/openpgp/s2k/s2k.go
+++ /dev/null
@@ -1,273 +0,0 @@
-// Copyright 2011 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 s2k implements the various OpenPGP string-to-key transforms as
-// specified in RFC 4800 section 3.7.1.
-package s2k // import "golang.org/x/crypto/openpgp/s2k"
-
-import (
-	"crypto"
-	"hash"
-	"io"
-	"strconv"
-
-	"golang.org/x/crypto/openpgp/errors"
-)
-
-// Config collects configuration parameters for s2k key-stretching
-// transformatioms. A nil *Config is valid and results in all default
-// values. Currently, Config is used only by the Serialize function in
-// this package.
-type Config struct {
-	// Hash is the default hash function to be used. If
-	// nil, SHA1 is used.
-	Hash crypto.Hash
-	// S2KCount is only used for symmetric encryption. It
-	// determines the strength of the passphrase stretching when
-	// the said passphrase is hashed to produce a key. S2KCount
-	// should be between 1024 and 65011712, inclusive. If Config
-	// is nil or S2KCount is 0, the value 65536 used. Not all
-	// values in the above range can be represented. S2KCount will
-	// be rounded up to the next representable value if it cannot
-	// be encoded exactly. When set, it is strongly encrouraged to
-	// use a value that is at least 65536. See RFC 4880 Section
-	// 3.7.1.3.
-	S2KCount int
-}
-
-func (c *Config) hash() crypto.Hash {
-	if c == nil || uint(c.Hash) == 0 {
-		// SHA1 is the historical default in this package.
-		return crypto.SHA1
-	}
-
-	return c.Hash
-}
-
-func (c *Config) encodedCount() uint8 {
-	if c == nil || c.S2KCount == 0 {
-		return 96 // The common case. Correspoding to 65536
-	}
-
-	i := c.S2KCount
-	switch {
-	// Behave like GPG. Should we make 65536 the lowest value used?
-	case i < 1024:
-		i = 1024
-	case i > 65011712:
-		i = 65011712
-	}
-
-	return encodeCount(i)
-}
-
-// encodeCount converts an iterative "count" in the range 1024 to
-// 65011712, inclusive, to an encoded count. The return value is the
-// octet that is actually stored in the GPG file. encodeCount panics
-// if i is not in the above range (encodedCount above takes care to
-// pass i in the correct range). See RFC 4880 Section 3.7.7.1.
-func encodeCount(i int) uint8 {
-	if i < 1024 || i > 65011712 {
-		panic("count arg i outside the required range")
-	}
-
-	for encoded := 0; encoded < 256; encoded++ {
-		count := decodeCount(uint8(encoded))
-		if count >= i {
-			return uint8(encoded)
-		}
-	}
-
-	return 255
-}
-
-// decodeCount returns the s2k mode 3 iterative "count" corresponding to
-// the encoded octet c.
-func decodeCount(c uint8) int {
-	return (16 + int(c&15)) << (uint32(c>>4) + 6)
-}
-
-// Simple writes to out the result of computing the Simple S2K function (RFC
-// 4880, section 3.7.1.1) using the given hash and input passphrase.
-func Simple(out []byte, h hash.Hash, in []byte) {
-	Salted(out, h, in, nil)
-}
-
-var zero [1]byte
-
-// Salted writes to out the result of computing the Salted S2K function (RFC
-// 4880, section 3.7.1.2) using the given hash, input passphrase and salt.
-func Salted(out []byte, h hash.Hash, in []byte, salt []byte) {
-	done := 0
-	var digest []byte
-
-	for i := 0; done < len(out); i++ {
-		h.Reset()
-		for j := 0; j < i; j++ {
-			h.Write(zero[:])
-		}
-		h.Write(salt)
-		h.Write(in)
-		digest = h.Sum(digest[:0])
-		n := copy(out[done:], digest)
-		done += n
-	}
-}
-
-// Iterated writes to out the result of computing the Iterated and Salted S2K
-// function (RFC 4880, section 3.7.1.3) using the given hash, input passphrase,
-// salt and iteration count.
-func Iterated(out []byte, h hash.Hash, in []byte, salt []byte, count int) {
-	combined := make([]byte, len(in)+len(salt))
-	copy(combined, salt)
-	copy(combined[len(salt):], in)
-
-	if count < len(combined) {
-		count = len(combined)
-	}
-
-	done := 0
-	var digest []byte
-	for i := 0; done < len(out); i++ {
-		h.Reset()
-		for j := 0; j < i; j++ {
-			h.Write(zero[:])
-		}
-		written := 0
-		for written < count {
-			if written+len(combined) > count {
-				todo := count - written
-				h.Write(combined[:todo])
-				written = count
-			} else {
-				h.Write(combined)
-				written += len(combined)
-			}
-		}
-		digest = h.Sum(digest[:0])
-		n := copy(out[done:], digest)
-		done += n
-	}
-}
-
-// Parse reads a binary specification for a string-to-key transformation from r
-// and returns a function which performs that transform.
-func Parse(r io.Reader) (f func(out, in []byte), err error) {
-	var buf [9]byte
-
-	_, err = io.ReadFull(r, buf[:2])
-	if err != nil {
-		return
-	}
-
-	hash, ok := HashIdToHash(buf[1])
-	if !ok {
-		return nil, errors.UnsupportedError("hash for S2K function: " + strconv.Itoa(int(buf[1])))
-	}
-	if !hash.Available() {
-		return nil, errors.UnsupportedError("hash not available: " + strconv.Itoa(int(hash)))
-	}
-	h := hash.New()
-
-	switch buf[0] {
-	case 0:
-		f := func(out, in []byte) {
-			Simple(out, h, in)
-		}
-		return f, nil
-	case 1:
-		_, err = io.ReadFull(r, buf[:8])
-		if err != nil {
-			return
-		}
-		f := func(out, in []byte) {
-			Salted(out, h, in, buf[:8])
-		}
-		return f, nil
-	case 3:
-		_, err = io.ReadFull(r, buf[:9])
-		if err != nil {
-			return
-		}
-		count := decodeCount(buf[8])
-		f := func(out, in []byte) {
-			Iterated(out, h, in, buf[:8], count)
-		}
-		return f, nil
-	}
-
-	return nil, errors.UnsupportedError("S2K function")
-}
-
-// Serialize salts and stretches the given passphrase and writes the
-// resulting key into key. It also serializes an S2K descriptor to
-// w. The key stretching can be configured with c, which may be
-// nil. In that case, sensible defaults will be used.
-func Serialize(w io.Writer, key []byte, rand io.Reader, passphrase []byte, c *Config) error {
-	var buf [11]byte
-	buf[0] = 3 /* iterated and salted */
-	buf[1], _ = HashToHashId(c.hash())
-	salt := buf[2:10]
-	if _, err := io.ReadFull(rand, salt); err != nil {
-		return err
-	}
-	encodedCount := c.encodedCount()
-	count := decodeCount(encodedCount)
-	buf[10] = encodedCount
-	if _, err := w.Write(buf[:]); err != nil {
-		return err
-	}
-
-	Iterated(key, c.hash().New(), passphrase, salt, count)
-	return nil
-}
-
-// hashToHashIdMapping contains pairs relating OpenPGP's hash identifier with
-// Go's crypto.Hash type. See RFC 4880, section 9.4.
-var hashToHashIdMapping = []struct {
-	id   byte
-	hash crypto.Hash
-	name string
-}{
-	{1, crypto.MD5, "MD5"},
-	{2, crypto.SHA1, "SHA1"},
-	{3, crypto.RIPEMD160, "RIPEMD160"},
-	{8, crypto.SHA256, "SHA256"},
-	{9, crypto.SHA384, "SHA384"},
-	{10, crypto.SHA512, "SHA512"},
-	{11, crypto.SHA224, "SHA224"},
-}
-
-// HashIdToHash returns a crypto.Hash which corresponds to the given OpenPGP
-// hash id.
-func HashIdToHash(id byte) (h crypto.Hash, ok bool) {
-	for _, m := range hashToHashIdMapping {
-		if m.id == id {
-			return m.hash, true
-		}
-	}
-	return 0, false
-}
-
-// HashIdToString returns the name of the hash function corresponding to the
-// given OpenPGP hash id.
-func HashIdToString(id byte) (name string, ok bool) {
-	for _, m := range hashToHashIdMapping {
-		if m.id == id {
-			return m.name, true
-		}
-	}
-
-	return "", false
-}
-
-// HashIdToHash returns an OpenPGP hash id which corresponds the given Hash.
-func HashToHashId(h crypto.Hash) (id byte, ok bool) {
-	for _, m := range hashToHashIdMapping {
-		if m.hash == h {
-			return m.id, true
-		}
-	}
-	return 0, false
-}