Update vendor (#852)

4 files changed, 19 insertions, 15 deletions

diff --git a/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_amd64.go b/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_amd64.go
index f9269c38..656e8df9 100644
--- a/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_amd64.go
+++ b/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_amd64.go
@@ -6,10 +6,9 @@
 
 package salsa
 
-// This function is implemented in salsa2020_amd64.s.
-
 //go:noescape
 
+// salsa2020XORKeyStream is implemented in salsa20_amd64.s.
 func salsa2020XORKeyStream(out, in *byte, n uint64, nonce, key *byte)
 
 // XORKeyStream crypts bytes from in to out using the given key and counters.
diff --git a/vendor/golang.org/x/crypto/salsa20/salsa/salsa2020_amd64.s b/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_amd64.s
index 22afbdca..18085d2e 100644
--- a/vendor/golang.org/x/crypto/salsa20/salsa/salsa2020_amd64.s
+++ b/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_amd64.s
@@ -99,30 +99,24 @@ TEXT ·salsa2020XORKeyStream(SB),0,$456-40 // frame = 424 + 32 byte alignment
 	MOVL  36 (SP),CX
 	MOVL DX,288(SP)
 	MOVL CX,304(SP)
-	ADDQ $1,DX
 	SHLQ $32,CX
 	ADDQ CX,DX
+	ADDQ $1,DX
 	MOVQ DX,CX
 	SHRQ $32,CX
 	MOVL DX, 292 (SP)
 	MOVL CX, 308 (SP)
 	ADDQ $1,DX
-	SHLQ $32,CX
-	ADDQ CX,DX
 	MOVQ DX,CX
 	SHRQ $32,CX
 	MOVL DX, 296 (SP)
 	MOVL CX, 312 (SP)
 	ADDQ $1,DX
-	SHLQ $32,CX
-	ADDQ CX,DX
 	MOVQ DX,CX
 	SHRQ $32,CX
 	MOVL DX, 300 (SP)
 	MOVL CX, 316 (SP)
 	ADDQ $1,DX
-	SHLQ $32,CX
-	ADDQ CX,DX
 	MOVQ DX,CX
 	SHRQ $32,CX
 	MOVL DX,16(SP)
diff --git a/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_noasm.go b/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_noasm.go
new file mode 100644
index 00000000..8a46bd2b
--- /dev/null
+++ b/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_noasm.go
@@ -0,0 +1,14 @@
+// Copyright 2019 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.
+
+// +build !amd64 appengine gccgo
+
+package salsa
+
+// XORKeyStream crypts bytes from in to out using the given key and counters.
+// In and out must overlap entirely or not at all. Counter
+// contains the raw salsa20 counter bytes (both nonce and block counter).
+func XORKeyStream(out, in []byte, counter *[16]byte, key *[32]byte) {
+	genericXORKeyStream(out, in, counter, key)
+}
diff --git a/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_ref.go b/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_ref.go
index 22126d17..68169c6d 100644
--- a/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_ref.go
+++ b/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_ref.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !amd64 appengine gccgo
-
 package salsa
 
 const rounds = 20
@@ -202,10 +200,9 @@ func core(out *[64]byte, in *[16]byte, k *[32]byte, c *[16]byte) {
 	out[63] = byte(x15 >> 24)
 }
 
-// XORKeyStream crypts bytes from in to out using the given key and counters.
-// In and out must overlap entirely or not at all. Counter
-// contains the raw salsa20 counter bytes (both nonce and block counter).
-func XORKeyStream(out, in []byte, counter *[16]byte, key *[32]byte) {
+// genericXORKeyStream is the generic implementation of XORKeyStream to be used
+// when no assembly implementation is available.
+func genericXORKeyStream(out, in []byte, counter *[16]byte, key *[32]byte) {
 	var block [64]byte
 	var counterCopy [16]byte
 	copy(counterCopy[:], counter[:])