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all: boringcrypto post-merge cleanup

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This CL addresses the comments on CL 403154.

For #51940.

Change-Id: I99bb3530916d469077bfbd53095bfcd1d2aa82ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/403976
Reviewed-by: Roland Shoemaker <roland@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
This commit is contained in:
Russ Cox 2022-05-04 08:58:02 -04:00
parent 6c7b223c2b
commit ea5d7cbc26
13 changed files with 35 additions and 87 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/cmd/go/internal/modindex/build.go
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@ -887,8 +887,8 @@ func (ctxt *Context) eval(x constraint.Expr, allTags map[string]bool) bool {
// $GOARCH
// boringcrypto
// ctxt.Compiler
// linux (if GOOS = android)
// solaris (if GOOS = illumos)
// linux (if GOOS == android)
// solaris (if GOOS == illumos)
// tag (if tag is listed in ctxt.BuildTags or ctxt.ReleaseTags)
//
// It records all consulted tags in allTags.

41
src/cmd/internal/notsha256/example_test.go
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@ -1,41 +0,0 @@
// Copyright 2016 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 notsha256_test
import (
"crypto/sha256"
"fmt"
"io"
"log"
"os"
)
func ExampleSum256() {
sum := sha256.Sum256([]byte("hello world\n"))
fmt.Printf("%x", sum)
// Output: a948904f2f0f479b8f8197694b30184b0d2ed1c1cd2a1ec0fb85d299a192a447
}
func ExampleNew() {
h := sha256.New()
h.Write([]byte("hello world\n"))
fmt.Printf("%x", h.Sum(nil))
// Output: a948904f2f0f479b8f8197694b30184b0d2ed1c1cd2a1ec0fb85d299a192a447
}
func ExampleNew_file() {
f, err := os.Open("file.txt")
if err != nil {
log.Fatal(err)
}
defer f.Close()
h := sha256.New()
if _, err := io.Copy(h, f); err != nil {
log.Fatal(err)
}
fmt.Printf("%x", h.Sum(nil))
}

3
src/crypto/aes/cipher.go
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@ -6,12 +6,11 @@ package aes
import (
"crypto/cipher"
"crypto/internal/boring"
"crypto/internal/subtle"
"strconv"
)
import "crypto/internal/boring"
// The AES block size in bytes.
const BlockSize = 16

3
src/crypto/aes/cipher_asm.go
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@ -8,13 +8,12 @@ package aes
import (
"crypto/cipher"
"crypto/internal/boring"
"crypto/internal/subtle"
"internal/cpu"
"internal/goarch"
)
import "crypto/internal/boring"
// defined in asm_*.s
//go:noescape

3
src/crypto/ecdsa/ecdsa.go
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@ -24,6 +24,7 @@ import (
"crypto/aes"
"crypto/cipher"
"crypto/elliptic"
"crypto/internal/boring"
"crypto/internal/boring/bbig"
"crypto/internal/randutil"
"crypto/sha512"
@ -31,8 +32,6 @@ import (
"io"
"math/big"
"crypto/internal/boring"
"golang.org/x/crypto/cryptobyte"
"golang.org/x/crypto/cryptobyte/asn1"
)

3
src/crypto/hmac/hmac.go
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@ -22,12 +22,11 @@ timing side-channels:
package hmac
import (
"crypto/internal/boring"
"crypto/subtle"
"hash"
)
import "crypto/internal/boring"
// FIPS 198-1:
// https://csrc.nist.gov/publications/fips/fips198-1/FIPS-198-1_final.pdf

7
src/crypto/internal/boring/aes.go
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@ -72,9 +72,6 @@ type extraModes interface {
NewCBCDecrypter(iv []byte) cipher.BlockMode
NewCTR(iv []byte) cipher.Stream
NewGCM(nonceSize, tagSize int) (cipher.AEAD, error)
// Invented for BoringCrypto.
NewGCMTLS() (cipher.AEAD, error)
}
var _ extraModes = (*aesCipher)(nil)
@ -235,8 +232,8 @@ func (c *aesCipher) NewGCM(nonceSize, tagSize int) (cipher.AEAD, error) {
return c.newGCM(false)
}
func (c *aesCipher) NewGCMTLS() (cipher.AEAD, error) {
return c.newGCM(true)
func NewGCMTLS(c cipher.Block) (cipher.AEAD, error) {
return c.(*aesCipher).newGCM(true)
}
func (c *aesCipher) newGCM(tls bool) (cipher.AEAD, error) {

1
src/crypto/internal/boring/notboring.go
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@ -50,6 +50,7 @@ func SHA512([]byte) [64]byte { panic("boringcrypto: not available") }
func NewHMAC(h func() hash.Hash, key []byte) hash.Hash { panic("boringcrypto: not available") }
func NewAESCipher(key []byte) (cipher.Block, error) { panic("boringcrypto: not available") }
func NewGCMTLS(cipher.Block) (cipher.AEAD, error) { panic("boringcrypto: not available") }
type PublicKeyECDSA struct{ _ int }
type PrivateKeyECDSA struct{ _ int }

3
src/crypto/rand/rand_unix.go
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@ -10,6 +10,7 @@
package rand
import (
"crypto/internal/boring"
"errors"
"io"
"os"
@ -19,8 +20,6 @@ import (
"time"
)
import "crypto/internal/boring"
const urandomDevice = "/dev/urandom"
func init() {

34
src/crypto/rsa/pkcs1v15.go
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@ -6,16 +6,14 @@ package rsa
import (
"crypto"
"crypto/internal/boring"
"crypto/internal/randutil"
"crypto/subtle"
"errors"
"io"
"math/big"
"crypto/internal/randutil"
)
import "crypto/internal/boring"
// This file implements encryption and decryption using PKCS #1 v1.5 padding.
// PKCS1v15DecrypterOpts is for passing options to PKCS #1 v1.5 decryption using
@ -32,7 +30,7 @@ type PKCS1v15DecryptOptions struct {
// scheme from PKCS #1 v1.5. The message must be no longer than the
// length of the public modulus minus 11 bytes.
//
// The rand parameter is used as a source of entropy to ensure that
// The random parameter is used as a source of entropy to ensure that
// encrypting the same message twice doesn't result in the same
// ciphertext.
//
@ -84,14 +82,14 @@ func EncryptPKCS1v15(random io.Reader, pub *PublicKey, msg []byte) ([]byte, erro
}
// DecryptPKCS1v15 decrypts a plaintext using RSA and the padding scheme from PKCS #1 v1.5.
// If rand != nil, it uses RSA blinding to avoid timing side-channel attacks.
// If random != nil, it uses RSA blinding to avoid timing side-channel attacks.
//
// Note that whether this function returns an error or not discloses secret
// information. If an attacker can cause this function to run repeatedly and
// learn whether each instance returned an error then they can decrypt and
// forge signatures as if they had the private key. See
// DecryptPKCS1v15SessionKey for a way of solving this problem.
func DecryptPKCS1v15(rand io.Reader, priv *PrivateKey, ciphertext []byte) ([]byte, error) {
func DecryptPKCS1v15(random io.Reader, priv *PrivateKey, ciphertext []byte) ([]byte, error) {
if err := checkPub(&priv.PublicKey); err != nil {
return nil, err
}
@ -108,7 +106,7 @@ func DecryptPKCS1v15(rand io.Reader, priv *PrivateKey, ciphertext []byte) ([]byt
return out, nil
}
valid, out, index, err := decryptPKCS1v15(rand, priv, ciphertext)
valid, out, index, err := decryptPKCS1v15(random, priv, ciphertext)
if err != nil {
return nil, err
}
@ -119,7 +117,7 @@ func DecryptPKCS1v15(rand io.Reader, priv *PrivateKey, ciphertext []byte) ([]byt
}
// DecryptPKCS1v15SessionKey decrypts a session key using RSA and the padding scheme from PKCS #1 v1.5.
// If rand != nil, it uses RSA blinding to avoid timing side-channel attacks.
// If random != nil, it uses RSA blinding to avoid timing side-channel attacks.
// It returns an error if the ciphertext is the wrong length or if the
// ciphertext is greater than the public modulus. Otherwise, no error is
// returned. If the padding is valid, the resulting plaintext message is copied
@ -137,7 +135,7 @@ func DecryptPKCS1v15(rand io.Reader, priv *PrivateKey, ciphertext []byte) ([]byt
// a random value was used (because it'll be different for the same ciphertext)
// and thus whether the padding was correct. This defeats the point of this
// function. Using at least a 16-byte key will protect against this attack.
func DecryptPKCS1v15SessionKey(rand io.Reader, priv *PrivateKey, ciphertext []byte, key []byte) error {
func DecryptPKCS1v15SessionKey(random io.Reader, priv *PrivateKey, ciphertext []byte, key []byte) error {
if err := checkPub(&priv.PublicKey); err != nil {
return err
}
@ -146,7 +144,7 @@ func DecryptPKCS1v15SessionKey(rand io.Reader, priv *PrivateKey, ciphertext []by
return ErrDecryption
}
valid, em, index, err := decryptPKCS1v15(rand, priv, ciphertext)
valid, em, index, err := decryptPKCS1v15(random, priv, ciphertext)
if err != nil {
return err
}
@ -163,12 +161,12 @@ func DecryptPKCS1v15SessionKey(rand io.Reader, priv *PrivateKey, ciphertext []by
}
// decryptPKCS1v15 decrypts ciphertext using priv and blinds the operation if
// rand is not nil. It returns one or zero in valid that indicates whether the
// random is not nil. It returns one or zero in valid that indicates whether the
// plaintext was correctly structured. In either case, the plaintext is
// returned in em so that it may be read independently of whether it was valid
// in order to maintain constant memory access patterns. If the plaintext was
// valid then index contains the index of the original message in em.
func decryptPKCS1v15(rand io.Reader, priv *PrivateKey, ciphertext []byte) (valid int, em []byte, index int, err error) {
func decryptPKCS1v15(random io.Reader, priv *PrivateKey, ciphertext []byte) (valid int, em []byte, index int, err error) {
k := priv.Size()
if k < 11 {
err = ErrDecryption
@ -188,7 +186,7 @@ func decryptPKCS1v15(rand io.Reader, priv *PrivateKey, ciphertext []byte) (valid
} else {
c := new(big.Int).SetBytes(ciphertext)
var m *big.Int
m, err = decrypt(rand, priv, c)
m, err = decrypt(random, priv, c)
if err != nil {
return
}
@ -220,15 +218,15 @@ func decryptPKCS1v15(rand io.Reader, priv *PrivateKey, ciphertext []byte) (valid
}
// nonZeroRandomBytes fills the given slice with non-zero random octets.
func nonZeroRandomBytes(s []byte, rand io.Reader) (err error) {
_, err = io.ReadFull(rand, s)
func nonZeroRandomBytes(s []byte, random io.Reader) (err error) {
_, err = io.ReadFull(random, s)
if err != nil {
return
}
for i := 0; i < len(s); i++ {
for s[i] == 0 {
_, err = io.ReadFull(rand, s[i:i+1])
_, err = io.ReadFull(random, s[i:i+1])
if err != nil {
return
}
@ -268,7 +266,7 @@ var hashPrefixes = map[crypto.Hash][]byte{
// function. If hash is zero, hashed is signed directly. This isn't
// advisable except for interoperability.
//
// If rand is not nil then RSA blinding will be used to avoid timing
// If random is not nil then RSA blinding will be used to avoid timing
// side-channel attacks.
//
// This function is deterministic. Thus, if the set of possible

4
src/crypto/rsa/pss.go
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@ -9,14 +9,13 @@ package rsa
import (
"bytes"
"crypto"
"crypto/internal/boring"
"errors"
"hash"
"io"
"math/big"
)
import "crypto/internal/boring"
// Per RFC 8017, Section 9.1
//
// EM = MGF1 xor DB || H( 8*0x00 || mHash || salt ) || 0xbc
@ -298,6 +297,7 @@ func SignPSS(rand io.Reader, priv *PrivateKey, hash crypto.Hash, digest []byte,
}
return boring.SignRSAPSS(bkey, hash, digest, saltLength)
}
boring.UnreachableExceptTests()
salt := make([]byte, saltLength)
if _, err := io.ReadFull(rand, salt); err != nil {

10
src/crypto/tls/cipher_suites.go
View File

@ -4,14 +4,13 @@
package tls
import "crypto/internal/boring"
import (
"crypto"
"crypto/aes"
"crypto/cipher"
"crypto/des"
"crypto/hmac"
"crypto/internal/boring"
"crypto/rc4"
"crypto/sha1"
"crypto/sha256"
@ -517,12 +516,9 @@ func aeadAESGCM(key, noncePrefix []byte) aead {
if err != nil {
panic(err)
}
type gcmtls interface {
NewGCMTLS() (cipher.AEAD, error)
}
var aead cipher.AEAD
if aesTLS, ok := aes.(gcmtls); ok {
aead, err = aesTLS.NewGCMTLS()
if boring.Enabled {
aead, err = boring.NewGCMTLS(aes)
} else {
boring.Unreachable()
aead, err = cipher.NewGCM(aes)

6
src/go/build/build.go
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@ -1883,11 +1883,13 @@ func (ctxt *Context) eval(x constraint.Expr, allTags map[string]bool) bool {
// cgo (if cgo is enabled)
// $GOOS
// $GOARCH
// boringcrypto
// ctxt.Compiler
// linux (if GOOS = android)
// solaris (if GOOS = illumos)
// tag (if tag is listed in ctxt.BuildTags or ctxt.ReleaseTags)
// darwin (if GOOS = ios)
// unix (if this is a Unix GOOS)
// boringcrypto (if GOEXPERIMENT=boringcrypto is enabled)
// tag (if tag is listed in ctxt.BuildTags, ctxt.ToolTags, or ctxt.ReleaseTags)
//
// It records all consulted tags in allTags.
func (ctxt *Context) matchTag(name string, allTags map[string]bool) bool {