APPS: Use a second EVP_MD_CTX for EdDSA verify

Verify for the two EdDSA algorithms fails in "speed eddsa".
It appears that the same ctx can not be used for the sign and verify
process.

Create a second EVP_MD_CTX for the verify purpose.

Fixes #11650
Signed-off-by: NSebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: NMatt Caswell <matt@openssl.org>
Reviewed-by: NDmitry Belyavskiy <beldmit@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/12074)

apps/speed.c

@@ -575,6 +575,7 @@ typedef struct loopargs_st {
     EC_KEY *ecdsa[ECDSA_NUM];
     EVP_PKEY_CTX *ecdh_ctx[EC_NUM];
     EVP_MD_CTX *eddsa_ctx[EdDSA_NUM];
+    EVP_MD_CTX *eddsa_ctx2[EdDSA_NUM];
 # ifndef OPENSSL_NO_SM2
     EVP_MD_CTX *sm2_ctx[SM2_NUM];
     EVP_MD_CTX *sm2_vfy_ctx[SM2_NUM];
@@ -1242,7 +1243,7 @@ static int EdDSA_verify_loop(void *args)
 {
     loopargs_t *tempargs = *(loopargs_t **) args;
     unsigned char *buf = tempargs->buf;
-    EVP_MD_CTX **edctx = tempargs->eddsa_ctx;
+    EVP_MD_CTX **edctx = tempargs->eddsa_ctx2;
     unsigned char *eddsasig = tempargs->buf2;
     size_t eddsasigsize = tempargs->sigsize;
     int ret, count;
@@ -3389,6 +3390,11 @@ int speed_main(int argc, char **argv)
                 st = 0;
                 break;
             }
+            loopargs[i].eddsa_ctx2[testnum] = EVP_MD_CTX_new();
+            if (loopargs[i].eddsa_ctx2[testnum] == NULL) {
+                st = 0;
+                break;
+            }
 
             if ((ed_pctx = EVP_PKEY_CTX_new_id(ed_curves[testnum].nid, NULL))
                     == NULL
@@ -3406,6 +3412,13 @@ int speed_main(int argc, char **argv)
                 EVP_PKEY_free(ed_pkey);
                 break;
             }
+           if (!EVP_DigestVerifyInit(loopargs[i].eddsa_ctx2[testnum], NULL,
+                                     NULL, NULL, ed_pkey)) {
+                st = 0;
+                EVP_PKEY_free(ed_pkey);
+                break;
+            }
+
             EVP_PKEY_free(ed_pkey);
         }
         if (st == 0) {
@@ -3443,10 +3456,9 @@ int speed_main(int argc, char **argv)
                 eddsa_results[testnum][0] = (double)count / d;
                 rsa_count = count;
             }
-
             /* Perform EdDSA verification test */
             for (i = 0; i < loopargs_len; i++) {
-                st = EVP_DigestVerify(loopargs[i].eddsa_ctx[testnum],
+                st = EVP_DigestVerify(loopargs[i].eddsa_ctx2[testnum],
                                       loopargs[i].buf2, loopargs[i].sigsize,
                                       loopargs[i].buf, 20);
                 if (st != 1)
@@ -4021,8 +4033,10 @@ int speed_main(int argc, char **argv)
             EC_KEY_free(loopargs[i].ecdsa[k]);
         for (k = 0; k < EC_NUM; k++)
             EVP_PKEY_CTX_free(loopargs[i].ecdh_ctx[k]);
-        for (k = 0; k < EdDSA_NUM; k++)
+        for (k = 0; k < EdDSA_NUM; k++) {
             EVP_MD_CTX_free(loopargs[i].eddsa_ctx[k]);
+            EVP_MD_CTX_free(loopargs[i].eddsa_ctx2[k]);
+	}
 # ifndef OPENSSL_NO_SM2
         for (k = 0; k < SM2_NUM; k++) {
             EVP_PKEY_CTX *pctx = NULL;