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Add test case to verify that the use after free issue is fixed.

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Test case based on reproducer by Guido Vranken.

Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/17263)
This commit is contained in:
Pauli 2021-12-14 11:08:00 +11:00
parent ad2fcee163
commit 27f7f52765
1 changed files with 31 additions and 0 deletions
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31
test/hmactest.c
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@ -245,6 +245,36 @@ err:
return ret;
}
static int test_hmac_copy_uninited(void)
{
const unsigned char key[24] = {0};
const unsigned char ct[166] = {0};
EVP_PKEY *pkey = NULL;
EVP_MD_CTX *ctx = NULL;
EVP_MD_CTX *ctx_tmp = NULL;
int res = 0;
if (!TEST_ptr(ctx = EVP_MD_CTX_new())
|| !TEST_ptr(pkey = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL,
key, sizeof(key)))
|| !TEST_true(EVP_DigestSignInit(ctx, NULL, EVP_sha1(), NULL, pkey))
|| !TEST_ptr(ctx_tmp = EVP_MD_CTX_new())
|| !TEST_true(EVP_MD_CTX_copy(ctx_tmp, ctx)))
goto err;
EVP_MD_CTX_free(ctx);
ctx = ctx_tmp;
ctx_tmp = NULL;
if (!TEST_true(EVP_DigestSignUpdate(ctx, ct, sizeof(ct))))
goto err;
res = 1;
err:
EVP_MD_CTX_free(ctx);
EVP_MD_CTX_free(ctx_tmp);
EVP_PKEY_free(pkey);
return res;
}
# ifndef OPENSSL_NO_MD5
static char *pt(unsigned char *md, unsigned int len)
{
@ -266,6 +296,7 @@ int setup_tests(void)
ADD_TEST(test_hmac_bad);
ADD_TEST(test_hmac_run);
ADD_TEST(test_hmac_copy);
ADD_TEST(test_hmac_copy_uninited);
return 1;
}