Add X448/Ed448 support to libssl

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Kurt Roeckx <kurt@roeckx.be>
(Merged from https://github.com/openssl/openssl/pull/5470)

5 files changed, 22 insertions, 3 deletions

diff --git a/ssl/ssl_cert_table.h b/ssl/ssl_cert_table.h
index fd6a1ad1e8..1376441a81 100644
--- a/ssl/ssl_cert_table.h
+++ b/ssl/ssl_cert_table.h
@@ -18,5 +18,6 @@ static const SSL_CERT_LOOKUP ssl_cert_info [] = {
     {NID_id_GostR3410_2001, SSL_aGOST01}, /* SSL_PKEY_GOST01 */
     {NID_id_GostR3410_2012_256, SSL_aGOST12}, /* SSL_PKEY_GOST12_256 */
     {NID_id_GostR3410_2012_512, SSL_aGOST12}, /* SSL_PKEY_GOST12_512 */
-    {EVP_PKEY_ED25519, SSL_aECDSA} /* SSL_PKEY_ED25519 */
+    {EVP_PKEY_ED25519, SSL_aECDSA}, /* SSL_PKEY_ED25519 */
+    {EVP_PKEY_ED448, SSL_aECDSA} /* SSL_PKEY_ED448 */
 };
diff --git a/ssl/ssl_lib.c b/ssl/ssl_lib.c
index 8804c52e78..accef0c0ce 100644
--- a/ssl/ssl_lib.c
+++ b/ssl/ssl_lib.c
@@ -3258,6 +3258,12 @@ void ssl_set_masks(SSL *s)
             && pvalid[SSL_PKEY_ED25519] & CERT_PKEY_EXPLICIT_SIGN
             && TLS1_get_version(s) == TLS1_2_VERSION)
             mask_a |= SSL_aECDSA;
+
+    /* Allow Ed448 for TLS 1.2 if peer supports it */
+    if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED448)
+            && pvalid[SSL_PKEY_ED448] & CERT_PKEY_EXPLICIT_SIGN
+            && TLS1_get_version(s) == TLS1_2_VERSION)
+            mask_a |= SSL_aECDSA;
 #endif
 
 #ifndef OPENSSL_NO_EC
diff --git a/ssl/ssl_locl.h b/ssl/ssl_locl.h
index 0dd2a7b727..f179efa231 100644
--- a/ssl/ssl_locl.h
+++ b/ssl/ssl_locl.h
@@ -381,7 +381,8 @@
 # define SSL_PKEY_GOST12_256     5
 # define SSL_PKEY_GOST12_512     6
 # define SSL_PKEY_ED25519        7
-# define SSL_PKEY_NUM            8
+# define SSL_PKEY_ED448          8
+# define SSL_PKEY_NUM            9
 /*
  * Pseudo-constant. GOST cipher suites can use different certs for 1
  * SSL_CIPHER. So let's see which one we have in fact.
@@ -1962,6 +1963,7 @@ typedef enum downgrade_en {
 #define TLSEXT_SIGALG_gostr34102001_gostr3411                   0xeded
 
 #define TLSEXT_SIGALG_ed25519                                   0x0807
+#define TLSEXT_SIGALG_ed448                                     0x0808
 
 /* Known PSK key exchange modes */
 #define TLSEXT_KEX_MODE_KE                                      0x00
diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c
index 57f9559993..8b0d9aa309 100644
--- a/ssl/t1_lib.c
+++ b/ssl/t1_lib.c
@@ -165,6 +165,7 @@ static const TLS_GROUP_INFO nid_list[] = {
     {NID_brainpoolP384r1, 192, TLS_CURVE_PRIME}, /* brainpoolP384r1 (27) */
     {NID_brainpoolP512r1, 256, TLS_CURVE_PRIME}, /* brainpool512r1 (28) */
     {EVP_PKEY_X25519, 128, TLS_CURVE_CUSTOM}, /* X25519 (29) */
+    {EVP_PKEY_X448, 224, TLS_CURVE_CUSTOM}, /* X448 (30) */
 };
 
 static const unsigned char ecformats_default[] = {
@@ -177,6 +178,7 @@ static const unsigned char ecformats_default[] = {
 static const uint16_t eccurves_default[] = {
     29,                      /* X25519 (29) */
     23,                      /* secp256r1 (23) */
+    30,                      /* X448 (30) */
     25,                      /* secp521r1 (25) */
     24,                      /* secp384r1 (24) */
 };
@@ -622,6 +624,7 @@ static const uint16_t tls12_sigalgs[] = {
     TLSEXT_SIGALG_ecdsa_secp384r1_sha384,
     TLSEXT_SIGALG_ecdsa_secp521r1_sha512,
     TLSEXT_SIGALG_ed25519,
+    TLSEXT_SIGALG_ed448,
 #endif
 
     TLSEXT_SIGALG_rsa_pss_pss_sha256,
@@ -672,6 +675,9 @@ static const SIGALG_LOOKUP sigalg_lookup_tbl[] = {
     {"ed25519", TLSEXT_SIGALG_ed25519,
      NID_undef, -1, EVP_PKEY_ED25519, SSL_PKEY_ED25519,
      NID_undef, NID_undef},
+    {"ed448", TLSEXT_SIGALG_ed448,
+     NID_undef, -1, EVP_PKEY_ED448, SSL_PKEY_ED448,
+     NID_undef, NID_undef},
     {NULL, TLSEXT_SIGALG_ecdsa_sha224,
      NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
      NID_ecdsa_with_SHA224, NID_undef},
@@ -764,7 +770,8 @@ static const uint16_t tls_default_sigalg[] = {
     TLSEXT_SIGALG_gostr34102001_gostr3411, /* SSL_PKEY_GOST01 */
     TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256, /* SSL_PKEY_GOST12_256 */
     TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512, /* SSL_PKEY_GOST12_512 */
-    0 /* SSL_PKEY_ED25519 */
+    0, /* SSL_PKEY_ED25519 */
+    0, /* SSL_PKEY_ED448 */
 };
 
 /* Lookup TLS signature algorithm */
@@ -2180,6 +2187,7 @@ void tls1_set_cert_validity(SSL *s)
     tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_256);
     tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_512);
     tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED25519);
+    tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED448);
 }
 
 /* User level utility function to check a chain is suitable */
diff --git a/ssl/t1_trce.c b/ssl/t1_trce.c
index fa975be174..ba5225849b 100644
--- a/ssl/t1_trce.c
+++ b/ssl/t1_trce.c
@@ -515,6 +515,7 @@ static const ssl_trace_tbl ssl_groups_tbl[] = {
     {27, "brainpoolP384r1"},
     {28, "brainpoolP512r1"},
     {29, "ecdh_x25519"},
+    {30, "ecdh_x448"},
     {256, "ffdhe2048"},
     {257, "ffdhe3072"},
     {258, "ffdhe4096"},
@@ -544,6 +545,7 @@ static const ssl_trace_tbl ssl_sigalg_tbl[] = {
     {TLSEXT_SIGALG_ecdsa_secp521r1_sha512, "ecdsa_secp521r1_sha512"},
     {TLSEXT_SIGALG_ecdsa_sha224, "ecdsa_sha224"},
     {TLSEXT_SIGALG_ed25519, "ed25519"},
+    {TLSEXT_SIGALG_ed448, "ed448"},
     {TLSEXT_SIGALG_ecdsa_sha1, "ecdsa_sha1"},
     {TLSEXT_SIGALG_rsa_pss_rsae_sha256, "rsa_pss_rsae_sha256"},
     {TLSEXT_SIGALG_rsa_pss_rsae_sha384, "rsa_pss_rsae_sha384"},