1 files changed, 14 insertions, 1 deletions

diff --git a/src/lib/libssl/src/apps/genrsa.c b/src/lib/libssl/src/apps/genrsa.c
index 1599bb7a69..fdc0d4a07d 100644
--- a/src/lib/libssl/src/apps/genrsa.c
+++ b/src/lib/libssl/src/apps/genrsa.c
@@ -95,6 +95,7 @@ int MAIN(int argc, char **argv)
         int ret=1;
         int i,num=DEFBITS;
         long l;
+        int use_x931 = 0;
         const EVP_CIPHER *enc=NULL;
         unsigned long f4=RSA_F4;
         char *outfile=NULL;
@@ -138,6 +139,8 @@ int MAIN(int argc, char **argv)
                         f4=3;
                 else if (strcmp(*argv,"-F4") == 0 || strcmp(*argv,"-f4") == 0)
                         f4=RSA_F4;
+                else if (strcmp(*argv,"-x931") == 0)
+                        use_x931 = 1;
 #ifndef OPENSSL_NO_ENGINE
                 else if (strcmp(*argv,"-engine") == 0)
                         {
@@ -266,7 +269,17 @@ bad:
         BIO_printf(bio_err,"Generating RSA private key, %d bit long modulus\n",
                 num);
 
-        if(!BN_set_word(bn, f4) || !RSA_generate_key_ex(rsa, num, bn, &cb))
+        if (use_x931)
+                {
+                BIGNUM *pubexp;
+                pubexp = BN_new();
+                if (!BN_set_word(pubexp, f4))
+                        goto err;
+                if (!RSA_X931_generate_key_ex(rsa, num, pubexp, &cb))
+                        goto err;
+                BN_free(pubexp);
+                }
+        else if(!BN_set_word(bn, f4) || !RSA_generate_key_ex(rsa, num, bn, &cb))
                 goto err;
                 
         app_RAND_write_file(NULL, bio_err);