From 6e2cb00008cbf09e556b00f87603797fcaa47e09 Mon Sep 17 00:00:00 2001 From: Christopher Speller Date: Mon, 16 Apr 2018 05:37:14 -0700 Subject: Depenancy upgrades and movign to dep. (#8630) --- vendor/golang.org/x/crypto/openpgp/s2k/s2k.go | 273 -------------------------- 1 file changed, 273 deletions(-) delete mode 100644 vendor/golang.org/x/crypto/openpgp/s2k/s2k.go (limited to 'vendor/golang.org/x/crypto/openpgp/s2k/s2k.go') diff --git a/vendor/golang.org/x/crypto/openpgp/s2k/s2k.go b/vendor/golang.org/x/crypto/openpgp/s2k/s2k.go deleted file mode 100644 index 4b9a44ca2..000000000 --- a/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 -} -- cgit v1.2.3-1-g7c22