[chore]: Bump golang.org/x/crypto from 0.6.0 to 0.7.0 (#1593)

Bumps [golang.org/x/crypto](https://github.com/golang/crypto) from 0.6.0 to 0.7.0.
- [Release notes](https://github.com/golang/crypto/releases)
- [Commits](https://github.com/golang/crypto/compare/v0.6.0...v0.7.0)

---
updated-dependencies:
- dependency-name: golang.org/x/crypto
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

vendor/golang.org/x/crypto/ssh/cipher.go

@@ -114,7 +114,8 @@ var cipherModes = map[string]*cipherMode{
 	"arcfour": {16, 0, streamCipherMode(0, newRC4)},
 
 	// AEAD ciphers
-	gcmCipherID:        {16, 12, newGCMCipher},
+	gcm128CipherID:     {16, 12, newGCMCipher},
+	gcm256CipherID:     {32, 12, newGCMCipher},
 	chacha20Poly1305ID: {64, 0, newChaCha20Cipher},
 
 	// CBC mode is insecure and so is not included in the default config.

vendor/golang.org/x/crypto/ssh/common.go

@@ -28,7 +28,7 @@ const (
 // supportedCiphers lists ciphers we support but might not recommend.
 var supportedCiphers = []string{
 	"aes128-ctr", "aes192-ctr", "aes256-ctr",
-	"aes128-gcm@openssh.com",
+	"aes128-gcm@openssh.com", gcm256CipherID,
 	chacha20Poly1305ID,
 	"arcfour256", "arcfour128", "arcfour",
 	aes128cbcID,
@@ -37,7 +37,7 @@ var supportedCiphers = []string{
 
 // preferredCiphers specifies the default preference for ciphers.
 var preferredCiphers = []string{
-	"aes128-gcm@openssh.com",
+	"aes128-gcm@openssh.com", gcm256CipherID,
 	chacha20Poly1305ID,
 	"aes128-ctr", "aes192-ctr", "aes256-ctr",
 }
@@ -168,7 +168,7 @@ func (a *directionAlgorithms) rekeyBytes() int64 {
 	// 2^(BLOCKSIZE/4) blocks. For all AES flavors BLOCKSIZE is
 	// 128.
 	switch a.Cipher {
-	case "aes128-ctr", "aes192-ctr", "aes256-ctr", gcmCipherID, aes128cbcID:
+	case "aes128-ctr", "aes192-ctr", "aes256-ctr", gcm128CipherID, gcm256CipherID, aes128cbcID:
 		return 16 * (1 << 32)
 
 	}
@@ -178,7 +178,8 @@ func (a *directionAlgorithms) rekeyBytes() int64 {
 }
 
 var aeadCiphers = map[string]bool{
-	gcmCipherID:        true,
+	gcm128CipherID:     true,
+	gcm256CipherID:     true,
 	chacha20Poly1305ID: true,
 }
 

vendor/golang.org/x/crypto/ssh/transport.go

@@ -17,7 +17,8 @@ import (
 const debugTransport = false
 
 const (
-	gcmCipherID    = "aes128-gcm@openssh.com"
+	gcm128CipherID = "aes128-gcm@openssh.com"
+	gcm256CipherID = "aes256-gcm@openssh.com"
 	aes128cbcID    = "aes128-cbc"
 	tripledescbcID = "3des-cbc"
 )