Update some documentation for X448/Ed448

Reviewed-by: NRich Salz <rsalz@openssl.org>
Reviewed-by: NKurt Roeckx <kurt@roeckx.be>
(Merged from https://github.com/openssl/openssl/pull/5481)

doc/HOWTO/keys.txt

@@ -98,7 +98,7 @@ it may be reasonable to avoid protecting it with a password, since
 otherwise someone would have to type in the password every time the
 server needs to access the key.
 
-For X25519, it's treated as a distinct algorithm but not as one of
+For X25519 and X448, it's treated as a distinct algorithm but not as one of
 the curves listed with 'ecparam -list_curves' option. You can use
 the following command to generate an X25519 key:
 

doc/man1/genpkey.pod

@@ -241,10 +241,10 @@ numeric OID. Following parameter sets are supported:
 
 =back
 
-=head1 X25519 KEY GENERATION OPTIONS
-
-The X25519 algorithm does not currently support any key generation options.
+=head1 X25519 and X448 KEY GENERATION OPTIONS
 
+The X25519 and X448 algorithms do not currently support any key generation
+options.
 
 =head1 NOTES
 

doc/man1/pkeyutl.pod

@@ -282,10 +282,10 @@ verify operations use ECDSA and derive uses ECDH. Currently there are no
 additional options other than B<digest>. Only the SHA1 digest can be used and
 this digest is assumed by default.
 
-=head1 X25519 ALGORITHM
+=head1 X25519 and X448 ALGORITHMS
 
-The X25519 algorithm supports key derivation only. Currently there are no
-additional options.
+The X25519 and X448 algorithms support key derivation only. Currently there are
+no additional options.
 
 =head1 EXAMPLES
 

doc/man7/Ed25519.pod

@@ -2,16 +2,18 @@
 
 =head1 NAME
 
-Ed25519 - EVP_PKEY Ed25519 support
+Ed25519,
+Ed448
+- EVP_PKEY Ed25519 and Ed448 support
 
 =head1 DESCRIPTION
 
-The B<Ed25519> EVP_PKEY implementation supports key generation, one shot
-digest sign and digest verify using PureEdDSA and B<Ed25519> (see RFC8032).
-It has associated private and public key formats compatible with
+The B<Ed25519> and B<Ed448> EVP_PKEY implementation supports key generation,
+one-shot digest sign and digest verify using PureEdDSA and B<Ed25519> or B<Ed448>
+(see RFC8032). It has associated private and public key formats compatible with
 draft-ietf-curdle-pkix-04.
 
-No additional parameters can be set during key generation one shot signing or
+No additional parameters can be set during key generation one-shot signing or
 verification. In particular, because PureEdDSA is used, when signing or
 verifying a digest must B<NOT> be specified.
 
@@ -19,20 +21,24 @@ verifying a digest must B<NOT> be specified.
 
 The PureEdDSA algorithm does not support the streaming mechanism
 of other signature algorithms using, for example, EVP_DigestUpdate().
-The message to sign or verify must be passed using the one shot
+The message to sign or verify must be passed using the one-shot
 EVP_DigestSign() asn EVP_DigestVerify() functions.
 
 When calling EVP_DigestSignInit() or EVP_DigestSignUpdate() the
 digest parameter B<MUST> be set to B<NULL>.
 
 Applications wishing to sign certificates (or other structures such as
-CRLs or certificate requests) using Ed25519 can either use X509_sign()
+CRLs or certificate requests) using Ed25519 or Ed448 can either use X509_sign()
 or X509_sign_ctx() in the usual way.
 
 A context for the B<Ed25519> algorithm can be obtained by calling:
 
  EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_ED25519, NULL);
 
+For the B<Ed448> algorithm a context can be obtained by calling:
+
+ EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_ED448, NULL);
+
 =head1 EXAMPLE
 
 This example generates an B<ED25519> private key and writes it to standard
@@ -57,7 +63,7 @@ L<EVP_DigestVerifyInit(3)>,
 
 =head1 COPYRIGHT
 
-Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
 
 Licensed under the OpenSSL license (the "License").  You may not use
 this file except in compliance with the License.  You can obtain a copy

doc/man7/X25519.pod

@@ -2,13 +2,15 @@
 
 =head1 NAME
 
-X25519 - EVP_PKEY X25519 support
+X25519,
+X448
+- EVP_PKEY X25519 and X448 support
 
 =head1 DESCRIPTION
 
-The B<X25519> EVP_PKEY implementation supports key generation and key
-derivation using B<X25519>. It has associated private and public key formats
-compatible with draft-ietf-curdle-pkix-03.
+The B<X25519> and B<X448> EVP_PKEY implementation supports key generation and
+key derivation using B<X25519> and B<X448>. It has associated private and public
+key formats compatible with draft-ietf-curdle-pkix-03.
 
 No additional parameters can be set during key generation.
 
@@ -21,6 +23,10 @@ A context for the B<X25519> algorithm can be obtained by calling:
 
  EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_X25519, NULL);
 
+For the B<X448> algorithm a context can be obtained by calling:
+
+ EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_X448, NULL);
+
 =head1 EXAMPLE
 
 This example generates an B<X25519> private key and writes it to standard
@@ -37,7 +43,7 @@ output in PEM format:
  PEM_write_PrivateKey(stdout, pkey, NULL, NULL, 0, NULL, NULL);
 
 The key derivation example in L<EVP_PKEY_derive(3)> can be used with
-B<X25519>.
+B<X25519> and B<X448>.
 
 =head1 SEE ALSO
 
@@ -48,7 +54,7 @@ L<EVP_PKEY_derive_set_peer(3)>
 
 =head1 COPYRIGHT
 
-Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
 
 Licensed under the OpenSSL license (the "License").  You may not use
 this file except in compliance with the License.  You can obtain a copy