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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
#include "api/s2n.h"
#include "crypto/s2n_crypto.h"
#include "crypto/s2n_openssl_x509.h"
#include "s2n_test.h"
#include "testlib/s2n_testlib.h"
#include "tls/s2n_tls.h"
#include "utils/s2n_safety.h"
#define CERTIFICATE_1 \
"MIIBljCCATygAwIBAgIUHxKbtYzLM4Bct5v5Sagb8aZU/BcwCgYIKoZIzj0EAwIw" \
"HjELMAkGA1UEBhMCVVMxDzANBgNVBAMMBmJyYW5jaDAgFw0yNDAxMjMwMDU3MTha" \
"GA8yMjAzMDYzMDAwNTcxOFowHDELMAkGA1UEBhMCVVMxDTALBgNVBAMMBGxlYWYw" \
"WTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAASAmJKXt9P8hSz9ubntEokFn06+Rexr" \
"lEujwWUIq5Kl6QwvtfDCzrJN/sUmM5mssjq7pF6XVr6zFcQ6G4BfnwGio1gwVjAU" \
"BgNVHREEDTALgglsb2NhbGhvc3QwHQYDVR0OBBYEFNlOWJn7XfzC6xORzzjrdnqK" \
"UlJwMB8GA1UdIwQYMBaAFFkQhpDCJ3bAbXw1tXpmk5Fi7YIGMAoGCCqGSM49BAMC" \
"A0gAMEUCIB58OBwIruTJIy1f3tUgM/wXoO7fCoU25sMcioHBV9dYAiEA7Ufxa2JF" \
"I5LP6RGyllsjjnh0MJy1ZMXhw7X6GqFn4Rw="
#define CERTIFICATE_2 \
"MIIBoDCCAUegAwIBAgIUQud1+tNUPAEBnJLb2Lyl3/vuA4EwCgYIKoZIzj0EAwIw" \
"HDELMAkGA1UEBhMCVVMxDTALBgNVBAMMBHJvb3QwIBcNMjQwMTIzMDA1NzE4WhgP" \
"MjIwMzA2MzAwMDU3MThaMB4xCzAJBgNVBAYTAlVTMQ8wDQYDVQQDDAZicmFuY2gw" \
"WTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAATfScB9w/LkHBAVXiyKN941555oyBpv" \
"IZeCNXX+gbSvnS0pNRr35BalgFmij86DaXLl68RrHQsnhZByJvnIplN+o2MwYTAP" \
"BgNVHRMBAf8EBTADAQH/MA4GA1UdDwEB/wQEAwICBDAdBgNVHQ4EFgQUWRCGkMIn" \
"dsBtfDW1emaTkWLtggYwHwYDVR0jBBgwFoAUfCtcQDvXYwkR37fHwe/mi7JyQIQw" \
"CgYIKoZIzj0EAwIDRwAwRAIgaK6aOuCfMwgAASavkZpoxWag49yco4d9AlxIU+rt" \
"U2UCIHRieWdQICIWSEHdRTXWPPEnOd7A3UmTgoqbMl+Imhy8"
#define CERTIFICATE_3 \
"MIIBnzCCAUWgAwIBAgIUe0/XdFLyc4+Sj1NMkvbagE8DFaUwCgYIKoZIzj0EAwIw" \
"HDELMAkGA1UEBhMCVVMxDTALBgNVBAMMBHJvb3QwIBcNMjQwMTIzMDA1NzE4WhgP" \
"MjIwMzA2MzAwMDU3MThaMBwxCzAJBgNVBAYTAlVTMQ0wCwYDVQQDDARyb290MFkw" \
"EwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEPPtDvucc4UGOdIjED2P/vDxVYDhO5P8s" \
"7lyys3QZpKapMuc9wOV0cQ6tN9h4kVY+FJocYgqDAl2vv6Rg/wSbl6NjMGEwHQYD" \
"VR0OBBYEFHwrXEA712MJEd+3x8Hv5ouyckCEMB8GA1UdIwQYMBaAFHwrXEA712MJ" \
"Ed+3x8Hv5ouyckCEMA8GA1UdEwEB/wQFMAMBAf8wDgYDVR0PAQH/BAQDAgIEMAoG" \
"CCqGSM49BAMCA0gAMEUCIQCcbhKRAsqQCj2pCXh+9og3sLw9q8nU4xAB9xuV3vPA" \
"FAIgBxFWfRdu09dtE0IUkLTY0WPxiWaYYrKexlD4wUquqJE="
#define BEGIN_CERT "BEGIN CERTIFICATE"
#define BEGIN_CERT_LINE "-----" BEGIN_CERT "-----"
#define END_CERT "END CERTIFICATE"
#define END_CERT_LINE "-----" END_CERT "-----"
static S2N_RESULT s2n_test_validate_cert(struct s2n_cert *cert, struct s2n_blob *expected)
{
RESULT_ENSURE_REF(cert);
RESULT_ENSURE_REF(expected);
RESULT_ENSURE_EQ(cert->raw.size, expected->size);
RESULT_ENSURE_EQ(memcmp(cert->raw.data, expected->data, expected->size), 0);
return S2N_RESULT_OK;
}
int main(int argc, char **argv)
{
BEGIN_TEST();
const char *expected_cert_strs[] = {
CERTIFICATE_1,
CERTIFICATE_2,
CERTIFICATE_3,
};
struct s2n_blob expected_certs[s2n_array_len(expected_cert_strs)] = { 0 };
EXPECT_EQUAL(s2n_array_len(expected_certs), s2n_array_len(expected_cert_strs));
for (size_t i = 0; i < s2n_array_len(expected_certs); i++) {
const char *base64_cert = expected_cert_strs[i];
struct s2n_blob *out = &expected_certs[i];
/* base64 requires more than one character per byte, so the binary
* output will be smaller than the base64 input.
*/
EXPECT_SUCCESS(s2n_alloc(out, strlen(base64_cert)));
struct s2n_stuffer out_stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_init(&out_stuffer, out));
DEFER_CLEANUP(struct s2n_stuffer in_stuffer = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_alloc(&in_stuffer, strlen(base64_cert)));
EXPECT_SUCCESS(s2n_stuffer_write_str(&in_stuffer, base64_cert));
EXPECT_SUCCESS(s2n_stuffer_read_base64(&in_stuffer, &out_stuffer));
out->size = s2n_stuffer_data_available(&out_stuffer);
}
struct s2n_test_case {
const char *name;
const char *input;
};
/* clang-format off */
const struct s2n_test_case test_cases[] = {
{
.name = "basic format",
.input =
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_2 "\n"
END_CERT_LINE "\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_3 "\n"
END_CERT_LINE "\n",
},
{
.name = "no newlines",
.input =
BEGIN_CERT_LINE CERTIFICATE_1 END_CERT_LINE
BEGIN_CERT_LINE CERTIFICATE_2 END_CERT_LINE
BEGIN_CERT_LINE CERTIFICATE_3 END_CERT_LINE,
},
{
.name = "empty lines",
.input =
"\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
"\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_2 "\n"
END_CERT_LINE "\n"
"\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_3 "\n"
END_CERT_LINE "\n"
"\n",
},
{
.name = "double empty lines",
.input =
"\n"
"\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
"\n"
"\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_2 "\n"
END_CERT_LINE "\n"
"\n"
"\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_3 "\n"
END_CERT_LINE "\n"
"\n"
"\n",
},
{
.name = "variable number of newlines",
.input =
"\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
"\n\n\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_2 "\n"
END_CERT_LINE "\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_3 "\n"
END_CERT_LINE "\n"
"\n\n"
},
{
.name = "whitespace",
.input =
" " BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE " \n"
" "
BEGIN_CERT_LINE "\n"
CERTIFICATE_2 "\n"
END_CERT_LINE " \n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_3 "\n"
END_CERT_LINE " \n",
},
{
.name = "extra dashes",
.input =
"-" BEGIN_CERT_LINE "--\n"
CERTIFICATE_1 "\n"
"---" END_CERT_LINE "----\n"
"-----" BEGIN_CERT_LINE "------\n"
CERTIFICATE_2 "\n"
END_CERT_LINE "---------------\n"
"--" BEGIN_CERT_LINE "---\n"
CERTIFICATE_3 "\n"
"-" END_CERT_LINE "-\n",
},
{
.name = "64 dashes",
.input =
"-----" "-----" "-----" "-----"
"-----" "-----" "-----" "-----"
"-----" "-----" "-----" "-----"
"----"
BEGIN_CERT
"-----" "-----" "-----" "-----"
"-----" "-----" "-----" "-----"
"-----" "-----" "-----" "-----"
"----"
"\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_2 "\n"
END_CERT_LINE "\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_3 "\n"
END_CERT_LINE "\n",
},
{
.name = "missing dashes",
.input =
"--" BEGIN_CERT "--\n"
CERTIFICATE_1 "\n"
"---" END_CERT "---\n"
"----" BEGIN_CERT "----\n"
CERTIFICATE_2 "\n"
"--" END_CERT "---\n"
"---" BEGIN_CERT "----\n"
CERTIFICATE_3 "\n"
"----" END_CERT "--\n",
},
{
.name = "delimiters share dashes",
.input =
"--" BEGIN_CERT "--" CERTIFICATE_1 "--" END_CERT
"--" BEGIN_CERT "--" CERTIFICATE_2 "--" END_CERT
"--" BEGIN_CERT "--" CERTIFICATE_3 "--" END_CERT "--" ,
},
{
.name = "non-certificate data",
.input =
"this is not a certificate\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
"\n"
"this is not a certificate either\n"
"\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_2 "\n"
END_CERT_LINE "not a certificate\n"
"not a certificate" BEGIN_CERT_LINE "\n"
CERTIFICATE_3 "\n"
END_CERT_LINE "\n",
},
{
.name = "comments",
.input =
"# cert1"
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
"\n"
"# cert2"
BEGIN_CERT_LINE "\n"
CERTIFICATE_2 "\n"
END_CERT_LINE "\n"
"\n"
"# cert3"
BEGIN_CERT_LINE "\n"
CERTIFICATE_3 "\n"
END_CERT_LINE "\n",
},
{
.name = "comments containing dashes",
.input =
"# cert-1\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
"\n"
"# -c-e-r-t-2-\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_2 "\n"
END_CERT_LINE "\n"
"\n"
"# -\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_3 "\n"
END_CERT_LINE "\n",
},
{
.name = "comments containing other special characters",
.input =
"# cert_1\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
"\n"
"# cert #2\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_2 "\n"
END_CERT_LINE "\n"
"\n"
"# cert !@$%! \n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_3 "\n"
END_CERT_LINE "\n",
},
{
.name = "trailing comment",
.input =
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_2 "\n"
END_CERT_LINE "\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_3 "\n"
END_CERT_LINE "\n"
"# trailing comment \n"
},
{
.name = "trailing whitespace",
.input =
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_2 "\n"
END_CERT_LINE "\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_3 "\n"
END_CERT_LINE "\n"
"\n"
"\n",
},
{
.name = "trailing non-certificate data",
.input =
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_2 "\n"
END_CERT_LINE "\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_3 "\n"
END_CERT_LINE "\n"
"this is not a certificate\n"
"neither is this",
},
};
/* clang-format on */
for (size_t i = 0; i < s2n_array_len(test_cases); i++) {
DEFER_CLEANUP(struct s2n_cert_chain_and_key *chain_and_key = s2n_cert_chain_and_key_new(),
s2n_cert_chain_and_key_ptr_free);
const struct s2n_test_case *test_case = &test_cases[i];
DEFER_CLEANUP(struct s2n_stuffer input = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_alloc(&input, strlen(test_case->input)));
EXPECT_SUCCESS(s2n_stuffer_write_str(&input, test_case->input));
struct s2n_cert_chain *cert_chain = chain_and_key->cert_chain;
if (s2n_create_cert_chain_from_stuffer(cert_chain, &input) != S2N_SUCCESS) {
fprintf(stderr, "Failed to parse \"%s\"\n", test_case->name);
FAIL_MSG("Failed to parse certificate chain input");
}
struct s2n_cert *cert = cert_chain->head;
for (size_t j = 0; j < s2n_array_len(expected_certs); j++) {
if (s2n_result_is_error(s2n_test_validate_cert(cert, &expected_certs[j]))) {
fprintf(stderr, "\"%s\" failed to parse cert %zu\n", test_case->name, j);
FAIL_MSG("Did not correctly read all certificates");
}
cert = cert->next;
}
}
/* clang-format off */
const struct s2n_test_case bad_test_cases[] = {
{
.name = "double begin marker",
.input =
BEGIN_CERT_LINE "\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
},
{
.name = "double end marker",
.input =
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
END_CERT_LINE "\n"
},
{
.name = "missing begin marker",
.input =
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
},
{
.name = "missing end marker",
.input =
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
},
{
.name = "no dashes before marker",
.input =
BEGIN_CERT "-----\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
},
{
.name = "no dashes after marker",
.input =
"-----" BEGIN_CERT "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
},
{
.name = "single dash before marker",
.input =
"-" BEGIN_CERT "-----\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
},
{
.name = "single dash after marker",
.input =
"-----" BEGIN_CERT "-\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
},
{
.name = "65 dashes before marker",
.input =
"-----" "-----" "-----" "-----"
"-----" "-----" "-----" "-----"
"-----" "-----" "-----" "-----"
"-----"
BEGIN_CERT "-----\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
},
{
.name = "65 dashes after marker",
.input =
"-----" BEGIN_CERT
"-----" "-----" "-----" "-----"
"-----" "-----" "-----" "-----"
"-----" "-----" "-----" "-----"
"-----" "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
},
{
.name = "dashes in comment",
.input =
"# --cert--\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
},
{
.name = "multiple certs: trailing marker",
.input =
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
BEGIN_CERT_LINE "\n"
},
{
.name = "multiple certs: trailing partial certificate",
.input =
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
BEGIN_CERT_LINE "\n"
"MIIBljCCATygAwIBAg\n"
},
{
.name = "multiple certs: missing end marker",
.input =
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
END_CERT_LINE "\n"
BEGIN_CERT_LINE "\n"
CERTIFICATE_1 "\n"
},
};
/* clang-format on */
for (size_t i = 0; i < s2n_array_len(bad_test_cases); i++) {
DEFER_CLEANUP(struct s2n_cert_chain_and_key *chain_and_key = s2n_cert_chain_and_key_new(),
s2n_cert_chain_and_key_ptr_free);
const struct s2n_test_case *test_case = &bad_test_cases[i];
DEFER_CLEANUP(struct s2n_stuffer test_input = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_alloc(&test_input, strlen(test_case->input)));
EXPECT_SUCCESS(s2n_stuffer_write_str(&test_input, test_case->input));
struct s2n_cert_chain *cert_chain = chain_and_key->cert_chain;
if (s2n_create_cert_chain_from_stuffer(cert_chain, &test_input) == S2N_SUCCESS) {
fprintf(stderr, "Successfully parsed invalid cert chain \"%s\"\n", test_case->name);
FAIL_MSG("Successfully parsed invalid cert chain");
};
}
/* Any case that is invalid for a single certificate should also be invalid
* for a certificate chain.
* We do not want to rely solely on our test for 0-length chains.
*/
const char *valid_cert_chain = test_cases[0].input;
for (size_t i = 0; i < s2n_array_len(bad_test_cases); i++) {
const struct s2n_test_case *test_case = &bad_test_cases[i];
/* The extra character is for an extra newline */
size_t test_input_size = strlen(test_case->input) + strlen(valid_cert_chain) + 1;
DEFER_CLEANUP(struct s2n_stuffer test_input = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_alloc(&test_input, test_input_size));
EXPECT_SUCCESS(s2n_stuffer_write_str(&test_input, valid_cert_chain));
/* Sanity check: valid chain is valid */
DEFER_CLEANUP(struct s2n_cert_chain_and_key *good_chain_and_key = s2n_cert_chain_and_key_new(),
s2n_cert_chain_and_key_ptr_free);
struct s2n_cert_chain *good_chain = good_chain_and_key->cert_chain;
EXPECT_SUCCESS(s2n_create_cert_chain_from_stuffer(good_chain, &test_input));
/* Add the invalid input to the end of the proven valid chain */
EXPECT_SUCCESS(s2n_stuffer_write_char(&test_input, '\n'));
EXPECT_SUCCESS(s2n_stuffer_write_str(&test_input, test_case->input));
EXPECT_SUCCESS(s2n_stuffer_reread(&test_input));
/* Test: valid chain + invalid test case is sill invalid */
DEFER_CLEANUP(struct s2n_cert_chain_and_key *bad_chain_and_key = s2n_cert_chain_and_key_new(),
s2n_cert_chain_and_key_ptr_free);
struct s2n_cert_chain *bad_chain = bad_chain_and_key->cert_chain;
if (s2n_create_cert_chain_from_stuffer(bad_chain, &test_input) == S2N_SUCCESS) {
fprintf(stderr, "Successfully parsed invalid cert chain \"%s\"\n", test_case->name);
FAIL_MSG("Successfully parsed invalid cert chain");
};
}
for (size_t i = 0; i < s2n_array_len(expected_certs); i++) {
EXPECT_SUCCESS(s2n_free(&expected_certs[i]));
}
END_TEST();
}
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