Don't SEGFAULT when trying to export a public DSA key as a private key.

diff --git a/crypto/dsa/dsa_ameth.c b/crypto/dsa/dsa_ameth.c
index 376156ec5ef3a6ad23539296601180f7b4fa1472..5f6e6f595fe55646dd3d2e394a1f47172200fad2 100644 (file)
--- a/crypto/dsa/dsa_ameth.c
+++ b/crypto/dsa/dsa_ameth.c
@@ -307,6 +307,12 @@ static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
        unsigned char *dp = NULL;
        int dplen;
 
+       if (!pkey->pkey.dsa->priv_key)
+               {
+               DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_MISSING_PARAMETERS);
+               goto err;
+               }
+
        params = ASN1_STRING_new();
 
        if (!params)