openssl: fix building against no-dsa openssl

(Not tested in CI. Regression within this release cycle.)

Fixing:
```
lib/vtls/openssl.c:304:48: error: unused parameter 'data' [-Werror,-Wunused-parameter]
  304 | static CURLcode get_pkey_dsa(struct Curl_easy *data,
      |                                                ^
lib/vtls/openssl.c:305:40: error: unused parameter 'pubkey' [-Werror,-Wunused-parameter]
  305 |                              EVP_PKEY *pubkey, BIO *mem, int i)
      |                                        ^
lib/vtls/openssl.c:305:53: error: unused parameter 'mem' [-Werror,-Wunused-parameter]
  305 |                              EVP_PKEY *pubkey, BIO *mem, int i)
      |                                                     ^
lib/vtls/openssl.c:305:62: error: unused parameter 'i' [-Werror,-Wunused-parameter]
  305 |                              EVP_PKEY *pubkey, BIO *mem, int i)
      |                                                              ^
```

Follow-up to 833efb437dd8fb8b3ff48274531b83a03798b24b #19471

Closes #20127

diff --git a/lib/vtls/openssl.c b/lib/vtls/openssl.c
index 339130103fe7ea6d235bf0c4eaee09137d3ecd6b..8a39d513d457c3974474dfa92fea9aea10d1c1d7 100644 (file)
--- a/lib/vtls/openssl.c
+++ b/lib/vtls/openssl.c
@@ -301,11 +301,11 @@ static CURLcode get_pkey_rsa(struct Curl_easy *data,
   return result;
 }
 
+#ifndef OPENSSL_NO_DSA
 static CURLcode get_pkey_dsa(struct Curl_easy *data,
                              EVP_PKEY *pubkey, BIO *mem, int i)
 {
   CURLcode result = CURLE_OK;
-#ifndef OPENSSL_NO_DSA
 #ifndef HAVE_EVP_PKEY_GET_PARAMS
   DSA *dsa = EVP_PKEY_get0_DSA(pubkey);
 #endif /* !HAVE_EVP_PKEY_GET_PARAMS */
@@ -333,9 +333,9 @@ static CURLcode get_pkey_dsa(struct Curl_easy *data,
   FREE_PKEY_PARAM_BIGNUM(q);
   FREE_PKEY_PARAM_BIGNUM(g);
   FREE_PKEY_PARAM_BIGNUM(pub_key);
-#endif /* !OPENSSL_NO_DSA */
   return result;
 }
+#endif /* !OPENSSL_NO_DSA */
 
 static CURLcode get_pkey_dh(struct Curl_easy *data,
                             EVP_PKEY *pubkey, BIO *mem, int i)
@@ -483,9 +483,11 @@ static CURLcode ossl_certchain(struct Curl_easy *data, SSL *ssl)
         result = get_pkey_rsa(data, pubkey, mem, i);
         break;
 
+#ifndef OPENSSL_NO_DSA
       case EVP_PKEY_DSA:
         result = get_pkey_dsa(data, pubkey, mem, i);
         break;
+#endif
 
       case EVP_PKEY_DH:
         result = get_pkey_dh(data, pubkey, mem, i);