Don't core dump when using CMAC with dgst.

We can't unfortunately print the CMAC cipher used without extending the API.

PR#2579
(cherry picked from commit 79e31a2842e10271581cbfdaae0145dd4bd35107)

diff --git a/apps/dgst.c b/apps/dgst.c
index d471dbdabda49e244f5ad13be5a059731fb46b44..19c9424be24007f316cb44a014f7b2790cac1535 100644 (file)
--- a/apps/dgst.c
+++ b/apps/dgst.c
@@ -529,7 +529,8 @@ int MAIN(int argc, char **argv)
                                        EVP_PKEY_asn1_get0_info(NULL, NULL,
                                                NULL, NULL, &sig_name, ameth);
                                }
-                       md_name = EVP_MD_name(md);
+                       if (md)
+                               md_name = EVP_MD_name(md);
                        }
                err = 0;
                for (i=0; i<argc; i++)
@@ -641,7 +642,12 @@ int do_fp(BIO *out, unsigned char *buf, BIO *bp, int sep, int binout,
        else 
                {
                if (sig_name)
-                       BIO_printf(out, "%s-%s(%s)= ", sig_name, md_name, file);
+                       {
+                       BIO_puts(out, sig_name);
+                       if (md_name)
+                               BIO_printf(out, "-%s", md_name);
+                       BIO_printf(out, "(%s)= ", file);
+                       }
                else if (md_name)
                        BIO_printf(out, "%s(%s)= ", md_name, file);
                else