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-rw-r--r--crypto/pem/pem_pkey.c5
-rw-r--r--test/evp_pkey_provided_test.c7
2 files changed, 10 insertions, 2 deletions
diff --git a/crypto/pem/pem_pkey.c b/crypto/pem/pem_pkey.c
index 53367c03db..8ffeed9d78 100644
--- a/crypto/pem/pem_pkey.c
+++ b/crypto/pem/pem_pkey.c
@@ -311,7 +311,7 @@ PEM_write_cb_ex_fnsig(PrivateKey, EVP_PKEY, BIO, write_bio)
IMPLEMENT_PEM_provided_write_body_main(pkey, bio);
legacy:
- if (x->ameth == NULL || x->ameth->priv_encode != NULL)
+ if (x != NULL && (x->ameth == NULL || x->ameth->priv_encode != NULL))
return PEM_write_bio_PKCS8PrivateKey(out, x, enc,
(const char *)kstr, klen, cb, u);
return PEM_write_bio_PrivateKey_traditional(out, x, enc, kstr, klen, cb, u);
@@ -336,6 +336,9 @@ int PEM_write_bio_PrivateKey_traditional(BIO *bp, const EVP_PKEY *x,
EVP_PKEY *copy = NULL;
int ret;
+ if (x == NULL)
+ return 0;
+
if (evp_pkey_is_assigned(x)
&& evp_pkey_is_provided(x)
&& evp_pkey_copy_downgraded(&copy, x))
diff --git a/test/evp_pkey_provided_test.c b/test/evp_pkey_provided_test.c
index 1269fbf24f..3237884d7c 100644
--- a/test/evp_pkey_provided_test.c
+++ b/test/evp_pkey_provided_test.c
@@ -188,7 +188,12 @@ static int test_print_key_using_pem(const char *alg, const EVP_PKEY *pk)
/* Unencrypted private key in PEM form */
|| !TEST_true(PEM_write_bio_PrivateKey(membio, pk,
NULL, NULL, 0, NULL, NULL))
- || !TEST_true(compare_with_file(alg, PRIV_PEM, membio)))
+ || !TEST_true(compare_with_file(alg, PRIV_PEM, membio))
+ /* NULL key */
+ || !TEST_false(PEM_write_bio_PrivateKey(membio, NULL,
+ NULL, NULL, 0, NULL, NULL))
+ || !TEST_false(PEM_write_bio_PrivateKey_traditional(membio, NULL,
+ NULL, NULL, 0, NULL, NULL)))
goto err;
ret = 1;