Replace fastsha256 with crypto/sha256 (#319)

chaincfg/chainhash/hashfuncs.go

@@ -11,7 +11,7 @@ import (
 
 // HashFunc calculates the hash of the supplied bytes.
 // TODO(jcv) Should modify blake256 so it has the same interface as blake2
-// and fastsha256 so these function can look more like btcsuite.  Then should
+// and sha256 so these function can look more like btcsuite.  Then should
 // try to get it to the upstream blake256 repo
 func HashFunc(data []byte) [blake256.Size]byte {
 	var outB [blake256.Size]byte

dcrec/edwards/ecdsa.go

@@ -7,14 +7,14 @@ package edwards
 import (
 	"bytes"
 	"crypto/hmac"
+	"crypto/sha256"
 	"fmt"
 	"hash"
 	"io"
 	"math/big"
 
 	"crypto/sha512"
 
-	"github.com/btcsuite/fastsha256"
 	"github.com/decred/ed25519"
 	"github.com/decred/ed25519/edwards25519"
 )
@@ -102,7 +102,7 @@ func NonceRFC6979(curve *TwistedEdwardsCurve, privkey *big.Int, hash []byte,
 	extra []byte, version []byte) *big.Int {
 	q := curve.Params().N
 	x := privkey
-	alg := fastsha256.New
+	alg := sha256.New
 
 	qlen := q.BitLen()
 	holen := alg().Size()

dcrec/secp256k1/schnorr/threshold_test.go

@@ -6,11 +6,11 @@ package schnorr
 
 import (
 	"bytes"
+	"crypto/sha256"
 	"encoding/hex"
 	"math/rand"
 	"testing"
 
-	"github.com/btcsuite/fastsha256"
 	"github.com/decred/dcrd/chaincfg/chainhash"
 	"github.com/decred/dcrd/dcrec/secp256k1"
 	"github.com/stretchr/testify/assert"
@@ -26,7 +26,7 @@ type signerHex struct {
 // Sha256. The internal tests from secp256k1 are kind of screwy and for
 // partial signatures call this hash function instead of testSchnorrHash.
 func testSchnorrSha256Hash(msg []byte) []byte {
-	sha := fastsha256.Sum256(msg)
+	sha := sha256.Sum256(msg)
 	return sha[:]
 }
 

dcrec/secp256k1/signature.go

@@ -10,12 +10,11 @@ import (
 	"crypto/ecdsa"
 	"crypto/elliptic"
 	"crypto/hmac"
+	"crypto/sha256"
 	"errors"
 	"fmt"
 	"hash"
 	"math/big"
-
-	"github.com/btcsuite/fastsha256"
 )
 
 // Errors returned by canonicalPadding.
@@ -455,7 +454,7 @@ func NonceRFC6979(privkey *big.Int, hash []byte, extra []byte,
 	curve := S256()
 	q := curve.Params().N
 	x := privkey
-	alg := fastsha256.New
+	alg := sha256.New
 
 	qlen := q.BitLen()
 	holen := alg().Size()

dcrec/secp256k1/signature_test.go

@@ -8,14 +8,13 @@ package secp256k1_test
 import (
 	"bytes"
 	"crypto/rand"
+	"crypto/sha256"
 	"encoding/hex"
 	"fmt"
 	"math/big"
 	"testing"
 
 	"github.com/decred/dcrd/dcrec/secp256k1"
-
-	"github.com/btcsuite/fastsha256"
 )
 
 type signatureTest struct {
@@ -561,7 +560,7 @@ func TestRFC6979(t *testing.T) {
 
 	for i, test := range tests {
 		privKey, _ := secp256k1.PrivKeyFromBytes(secp256k1.S256(), decodeHex(test.key))
-		hash := fastsha256.Sum256([]byte(test.msg))
+		hash := sha256.Sum256([]byte(test.msg))
 
 		// Ensure deterministically generated nonce is the expected value.
 		gotNonce := secp256k1.TstNonceRFC6979(privKey.D, hash[:]).Bytes()

glide.yaml

@@ -1,7 +1,6 @@
 package: github.com/decred/dcrd
 import:
 - package: github.com/btcsuite/btclog
-- package: github.com/btcsuite/fastsha256
 - package: github.com/btcsuite/go-flags
 - package: github.com/btcsuite/go-socks
   subpackages:

rpcserver.go

@@ -7,6 +7,7 @@ package main
 
 import (
 	"bytes"
+	"crypto/sha256"
 	"crypto/subtle"
 	"crypto/tls"
 	"encoding/base64"
@@ -30,7 +31,6 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/btcsuite/fastsha256"
 	"github.com/btcsuite/websocket"
 
 	"github.com/decred/bitset"
@@ -5723,8 +5723,8 @@ type rpcServer struct {
 	policy       *mining.Policy
 	server       *server
 	chain        *blockchain.BlockChain
-	authsha      [fastsha256.Size]byte
-	limitauthsha [fastsha256.Size]byte
+	authsha      [sha256.Size]byte
+	limitauthsha [sha256.Size]byte
 	ntfnMgr      *wsNotificationManager
 	numClients   int32
 	statusLines  map[int]string
@@ -5881,7 +5881,7 @@ func (s *rpcServer) checkAuth(r *http.Request, require bool) (bool, bool, error)
 		return false, false, nil
 	}
 
-	authsha := fastsha256.Sum256([]byte(authhdr[0]))
+	authsha := sha256.Sum256([]byte(authhdr[0]))
 
 	// Check for limited auth first as in environments with limited users, those
 	// are probably expected to have a higher volume of calls
@@ -6218,12 +6218,12 @@ func newRPCServer(listenAddrs []string, policy *mining.Policy, s *server) (*rpcS
 	if cfg.RPCUser != "" && cfg.RPCPass != "" {
 		login := cfg.RPCUser + ":" + cfg.RPCPass
 		auth := "Basic " + base64.StdEncoding.EncodeToString([]byte(login))
-		rpc.authsha = fastsha256.Sum256([]byte(auth))
+		rpc.authsha = sha256.Sum256([]byte(auth))
 	}
 	if cfg.RPCLimitUser != "" && cfg.RPCLimitPass != "" {
 		login := cfg.RPCLimitUser + ":" + cfg.RPCLimitPass
 		auth := "Basic " + base64.StdEncoding.EncodeToString([]byte(login))
-		rpc.limitauthsha = fastsha256.Sum256([]byte(auth))
+		rpc.limitauthsha = sha256.Sum256([]byte(auth))
 	}
 	rpc.ntfnMgr = newWsNotificationManager(&rpc)
 

rpcwebsocket.go

@@ -8,6 +8,7 @@ package main
 import (
 	"bytes"
 	"container/list"
+	"crypto/sha256"
 	"crypto/subtle"
 	"encoding/base64"
 	"encoding/hex"
@@ -20,7 +21,6 @@ import (
 	"sync"
 	"time"
 
-	"github.com/btcsuite/fastsha256"
 	"github.com/btcsuite/golangcrypto/ripemd160"
 	"github.com/btcsuite/websocket"
 
@@ -1325,7 +1325,7 @@ func (c *wsClient) handleMessage(msg []byte) {
 		// Check credentials.
 		login := authCmd.Username + ":" + authCmd.Passphrase
 		auth := "Basic " + base64.StdEncoding.EncodeToString([]byte(login))
-		authSha := fastsha256.Sum256([]byte(auth))
+		authSha := sha256.Sum256([]byte(auth))
 		cmp := subtle.ConstantTimeCompare(authSha[:], c.server.authsha[:])
 		limitcmp := subtle.ConstantTimeCompare(authSha[:], c.server.limitauthsha[:])
 		if cmp != 1 && limitcmp != 1 {