design/68723-crypto-ssh-v2.md: crypto.Signer returns ed25519 keys as value

This is now consistent with x509.MarshalPKCS8PrivateKey, see
golang/go#51974

Change-Id: Id643ef260facfb38730bc3db30e63555aa3d64a4
GitHub-Last-Rev: 5e5819e13c3c59b5b3d13b2ad6722f526c11aeb0
GitHub-Pull-Request: golang/proposal#53
Reviewed-on: https://go-review.googlesource.com/c/proposal/+/614278
Commit-Queue: Nicola Murino <nicola.murino@gmail.com>
Reviewed-by: Nicola Murino <nicola.murino@gmail.com>
Auto-Submit: Nicola Murino <nicola.murino@gmail.com>
diff --git a/design/68723-crypto-ssh-v2.md b/design/68723-crypto-ssh-v2.md
index 8827f14..5210f9e 100644
--- a/design/68723-crypto-ssh-v2.md
+++ b/design/68723-crypto-ssh-v2.md
@@ -391,6 +391,9 @@
     Signer
 }
 
+// CryptoSigner returns the private key associated with the Signer. It returns a
+// *rsa.PrivateKey, an *ecdsa.PrivateKey or an ed25519.PrivateKey (not a pointer).
+// Note: in v1 ed25519.PrivateKey was returned as a pointer.
 func (k *PrivateKeySigner) CryptoSigner() crypto.Signer
 
 func ParsePrivateKey(pemBytes []byte) (*PrivateKeySigner, error)
@@ -398,6 +401,8 @@
 func ParsePrivateKeyWithPassphrase(pemBytes, passphrase []byte) (*PrivateKeySigner, error)
 ```
 
+Differently from v1, `CryptoSigner` returns ed25519.PrivateKey as value and not as pointer, see [golang/go#51974](https://github.com/golang/go/issues/51974).
+
 ### Add MarshalPrivateKeyOptions
 
 Instead of passing options as function parameters to `MarshalPrivateKey` add a struct for options.
diff --git a/design/68723/ssh.html b/design/68723/ssh.html
index ff90f86..47c353a 100644
--- a/design/68723/ssh.html
+++ b/design/68723/ssh.html
@@ -1965,6 +1965,9 @@
 <a href="#ParsePrivateKey">ssh.ParsePrivateKey</a>.
 <h4 id="PrivateKeySigner.CryptoSigner">func (*PrivateKeySigner) CryptoSigner</h4>
   <pre class="chroma"><span class="kd">func</span> <span class="p">(</span><span class="nx">k</span> <span class="o">*</span><a href="#PrivateKeySigner"><span class="nx">PrivateKeySigner</span></a><span class="p">)</span> <span class="nf">CryptoSigner</span><span class="p">()</span> <a href="https://pkg.go.dev/crypto"><span class="nx">crypto</span></a><span class="p">.</span><a href="https://pkg.go.dev/crypto#Signer"><span class="nx">Signer</span></a></pre>
+  <p>CryptoSigner returns the private key associated with the Signer. It returns a
+    *rsa.PrivateKey, an *ecdsa.PrivateKey or an ed25519.PrivateKey (not a pointer).
+    Note: in v1 ed25519.PrivateKey was returned as a pointer.
   <h3 id="PublicKey">type PublicKey</h3>
     <pre class="chroma"><span class="kd">type</span> <span class="nx">PublicKey</span> <span class="kd">interface</span> <span class="p">{</span>
 	<span class="c1">// Type returns the key format name, e.g. &#34;ssh-rsa&#34;.