X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=providers%2Fimplementations%2Fexchange%2Fecx_exch.c;h=ea12628937392fd4d420d2eb130bebbfcfc2f953;hp=b7d1d9e3951247e7a94e48ac1326d429d9a373cc;hb=97b50f67f212589661c9f1edd5285822c6cc642b;hpb=6f7d213533d9c7c2d810499cfedaa6d2424482c9

diff --git a/providers/implementations/exchange/ecx_exch.c b/providers/implementations/exchange/ecx_exch.c
index b7d1d9e395..ea12628937 100644
--- a/providers/implementations/exchange/ecx_exch.c
+++ b/providers/implementations/exchange/ecx_exch.c
@@ -16,6 +16,9 @@
 #include "crypto/ecx.h"
 #include "prov/implementations.h"
 #include "prov/providercommonerr.h"
+#ifdef S390X_EC_ASM
+# include "s390x_arch.h"
+#endif
 
 static OSSL_OP_keyexch_newctx_fn x25519_newctx;
 static OSSL_OP_keyexch_newctx_fn x448_newctx;
@@ -126,11 +129,31 @@ static int ecx_derive(void *vecxctx, unsigned char *secret, size_t *secretlen,
     }
 
     if (ecxctx->keylen == X25519_KEYLEN) {
+#ifdef S390X_EC_ASM
+        if (OPENSSL_s390xcap_P.pcc[1]
+                & S390X_CAPBIT(S390X_SCALAR_MULTIPLY_X25519)) {
+            if (s390x_x25519_mul(secret, ecxctx->peerkey->pubkey,
+                                 ecxctx->key->privkey) == 0) {
+                ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_DURING_DERIVATION);
+                return 0;
+            }
+        } else
+#endif
         if (X25519(secret, ecxctx->key->privkey, ecxctx->peerkey->pubkey) == 0) {
             ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_DURING_DERIVATION);
             return 0;
         }
     } else {
+#ifdef S390X_EC_ASM
+        if (OPENSSL_s390xcap_P.pcc[1]
+                & S390X_CAPBIT(S390X_SCALAR_MULTIPLY_X448)) {
+            if (s390x_x448_mul(secret, ecxctx->peerkey->pubkey,
+                               ecxctx->key->privkey) == 0) {
+                ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_DURING_DERIVATION);
+                return 0;
+            }
+        } else
+#endif
         if (X448(secret, ecxctx->key->privkey, ecxctx->peerkey->pubkey) == 0) {
             ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_DURING_DERIVATION);
             return 0;