Merge branch 'hans/crypto/eddsa/OTP-15419' into maint

* hans/crypto/eddsa/OTP-15419:
  public_key: Add Edward curves to the documentation
  public_key: Add ed25519 and ed448 sign/verify
  crypto: Add Edward curves to the documentation
  crypto: Add eddsa test case (ed25519 and ed448)
  crypto: Add ed25519 and ed448 sign/verify

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/crypto/doc/src/algorithm_details.xml b/lib/crypto/doc/src/algorithm_details.xml
index 4d58d26970..854bfbb4b1 100644
--- a/lib/crypto/doc/src/algorithm_details.xml
+++ b/lib/crypto/doc/src/algorithm_details.xml
@@ -303,6 +303,20 @@
     </section>
 
     <section>
+      <title>EdDSA</title>
+      <p>EdDSA is available with OpenSSL 1.1.1 or later if not disabled by configuration.
+      To dynamically check availability, check that the atom <c>eddsa</c> is present in the
+      list with the <c>public_keys</c> tag in the return value of
+      <seealso marker="crypto#supports-0">crypto:supports()</seealso>.
+      </p>
+      <p>Support for the curves ed25519 and ed448 is implemented.
+      The actual supported named curves could be checked by examining the list with the
+      <c>curves</c> tag in the return value of
+      <seealso marker="crypto#supports-0">crypto:supports()</seealso>.
+      </p>
+    </section>
+
+    <section>
       <title>Diffie-Hellman</title>
       <p>Diffie-Hellman computations are available with OpenSSL versions compatible with Erlang CRYPTO
       if not disabled by configuration.