If an engine comes up explicitely, it must also come down explicitely
In apps/apps.c, one can set up an engine with setup_engine().
However, we freed the structural reference immediately, which means
that for engines that don't already have a structural reference
somewhere else (because it's a built in engine), we end up returning
an invalid reference.
Instead, the function release_engine() is added, and called at the end
of the routines that call setup_engine().
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1643)
diff --git a/apps/pkeyutl.c b/apps/pkeyutl.c
index b847eb9..3ba75ad 100644
--- a/apps/pkeyutl.c
+++ b/apps/pkeyutl.c
@@ -323,6 +323,7 @@
end:
EVP_PKEY_CTX_free(ctx);
+ release_engine(e);
BIO_free(in);
BIO_free_all(out);
OPENSSL_free(buf_in);
