package/gensio: fix libressl build

Fix the following libressl build failure raised since bump to version
2.5.5 in commit 8f67d23af11510b447d9d0e1a71249f97e655305 and
https://github.com/cminyard/gensio/commit/12c94a29808e930a660142013c518468ca14ea62:

gensio_filter_certauth.c: In function 'v3_certauth_add_challenge_rsp':
gensio_filter_certauth.c:735:44: error: 'EVP_PKEY_ED25519' undeclared (first use in this function); did you mean 'EVP_PKEY_DSA1'?
  735 |     if (EVP_PKEY_base_id(sfilter->pkey) == EVP_PKEY_ED25519) {
      |                                            ^~~~~~~~~~~~~~~~
      |                                            EVP_PKEY_DSA1

Fixes:
 - http://autobuild.buildroot.org/results/a0348df9bf9c7ccfd576f607abb6b186da384ad9

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/gensio/0001-Fix-missing-EVP_PKEY_ED25519-build-error-on-libressl.patch

@@ -0,0 +1,105 @@
+From 1e7071684329f23ee3447310d203d193c283979e Mon Sep 17 00:00:00 2001
+From: James Hilliard <james.hilliard1@gmail.com>
+Date: Wed, 5 Oct 2022 15:30:32 -0600
+Subject: [PATCH] Fix missing EVP_PKEY_ED25519 build error on libressl
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Fixes:
+gensio_filter_certauth.c: In function ‘v3_certauth_add_challenge_rsp’:
+gensio_filter_certauth.c:838:44: error: ‘EVP_PKEY_ED25519’ undeclared (first use in this function); did you mean ‘EVP_PKEY_DSA1’?
+  838 |     if (EVP_PKEY_base_id(sfilter->pkey) == EVP_PKEY_ED25519) {
+      |                                            ^~~~~~~~~~~~~~~~
+      |                                            EVP_PKEY_DSA1
+gensio_filter_certauth.c:838:44: note: each undeclared identifier is reported only once for each function it appears in
+gensio_filter_certauth.c: In function ‘certauth_add_challenge_rsp’:
+gensio_filter_certauth.c:901:44: error: ‘EVP_PKEY_ED25519’ undeclared (first use in this function); did you mean ‘EVP_PKEY_DSA1’?
+  901 |     if (EVP_PKEY_base_id(sfilter->pkey) == EVP_PKEY_ED25519)
+      |                                            ^~~~~~~~~~~~~~~~
+      |                                            EVP_PKEY_DSA1
+gensio_filter_certauth.c: In function ‘certauth_check_challenge’:
+gensio_filter_certauth.c:1048:35: error: ‘EVP_PKEY_ED25519’ undeclared (first use in this function); did you mean ‘EVP_PKEY_DSA1’?
+ 1048 |     if (EVP_PKEY_base_id(pkey) == EVP_PKEY_ED25519)
+      |                                   ^~~~~~~~~~~~~~~~
+      |                                   EVP_PKEY_DSA1
+
+Signed-off-by: Corey Minyard <cminyard@mvista.com>
+[Retrieved from:
+https://github.com/cminyard/gensio/commit/1e7071684329f23ee3447310d203d193c283979e]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ lib/gensio_filter_certauth.c |  6 ++++++
+ tools/gtlssh-keygen.c        | 11 ++++++++++-
+ 2 files changed, 16 insertions(+), 1 deletion(-)
+
+diff --git a/lib/gensio_filter_certauth.c b/lib/gensio_filter_certauth.c
+index 642379b6..c4552e79 100644
+--- a/lib/gensio_filter_certauth.c
++++ b/lib/gensio_filter_certauth.c
+@@ -835,11 +835,13 @@ v3_certauth_add_challenge_rsp(struct certauth_filter *sfilter)
+     unsigned int lenpos, len;
+     int rv = 0;
+ 
++#ifdef EVP_PKEY_ED25519
+     if (EVP_PKEY_base_id(sfilter->pkey) == EVP_PKEY_ED25519) {
+ 	gca_log_err(sfilter,
+ 		    "Remote end or SSL too old to support ed25519 key");
+ 	return GE_KEYINVALID;
+     }
++#endif
+ 
+     certauth_write_byte(sfilter, CERTAUTH_CHALLENGE_RSP);
+     lenpos = sfilter->write_buf_len;
+@@ -898,8 +900,10 @@ certauth_add_challenge_rsp(struct certauth_filter *sfilter)
+     if (sfilter->version < 4 || sfilter->my_version < 4)
+ 	return v3_certauth_add_challenge_rsp(sfilter);
+ 
++#ifdef EVP_PKEY_ED25519
+     if (EVP_PKEY_base_id(sfilter->pkey) == EVP_PKEY_ED25519)
+ 	digest = NULL;
++#endif
+ 
+     certauth_write_byte(sfilter, CERTAUTH_CHALLENGE_RSP);
+     lenpos = sfilter->write_buf_len;
+@@ -1045,8 +1049,10 @@ certauth_check_challenge(struct certauth_filter *sfilter)
+ 	goto out_nomem;
+     }
+ 
++#ifdef EVP_PKEY_ED25519
+     if (EVP_PKEY_base_id(pkey) == EVP_PKEY_ED25519)
+ 	digest = NULL;
++#endif
+ 
+     if (!EVP_DigestVerifyInit(sign_ctx, NULL, digest, NULL, pkey)) {
+ 	gca_logs_err(sfilter, "Digest verify init failed");
+diff --git a/tools/gtlssh-keygen.c b/tools/gtlssh-keygen.c
+index c8c28937..0779dd78 100644
+--- a/tools/gtlssh-keygen.c
++++ b/tools/gtlssh-keygen.c
+@@ -108,7 +108,12 @@ help(const char *progname)
+     P("        The default is your username for normal certificates and\n");
+     P("        the fully qualified domain name for server certificates.\n");
+     P("  --algorithm <algname> - Set the algorithm to use for the key,\n");
+-    P("        either ed25519, rsa or ec.  The default is ed25519.\n");
++    P("        either ed25519, rsa or ec.  ");
++#ifdef EVP_PKEY_ED25519
++    P("The default is ed25519.\n");
++#else
++    P("The default is ec.\n");
++#endif
+     P("  --force, -f - Don't ask questions, just do the operation.  This\n");
+     P("        may overwrite data without asking.\n");
+     P("  --version - Print the version number and exit.\n");
+@@ -831,7 +836,11 @@ genpkey_ed25519(const char *key)
+     return rc != 0;
+ }
+ 
++#ifdef EVP_PKEY_ED25519
+ static int (*genpkey)(const char *key) = genpkey_ed25519;
++#else
++static int (*genpkey)(const char *key) = genpkey_ec;
++#endif
+ 
+ /*
+  * Create a single key.  If name is NULL, it's a server key, otherwise