Fix DSA parameter generation control error

When setting the digest parameter for DSA parameter generation, the
signature MD was set instead of the parameter generation one.
Fortunately, that's also the one that was used for parameter
generation, but it ultimately meant the parameter generator MD and the
signature MD would always be the same.

Fixes github issue #2016

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2250)
(cherry picked from commit 8a05c4d3b5a1bfb9193ea24e71735e11de7168d2)

diff --git a/crypto/dsa/dsa_pmeth.c b/crypto/dsa/dsa_pmeth.c
index 42b8bb0862511d9234550837b9e361cfa121f803..78724839b5249b308f8a3dd4f584ad7c56f22c7b 100644 (file)
--- a/crypto/dsa/dsa_pmeth.c
+++ b/crypto/dsa/dsa_pmeth.c
@@ -180,7 +180,7 @@ static int pkey_dsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
             DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE);
             return 0;
         }
-        dctx->md = p2;
+        dctx->pmd = p2;
         return 1;
 
     case EVP_PKEY_CTRL_MD: