mbedtls/tests/suites/test_suite_pkwrite.function

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/* BEGIN_HEADER */
2015-03-09 18:05:11 +01:00
#include "mbedtls/pk.h"
#include "mbedtls/pem.h"
#include "mbedtls/oid.h"
typedef enum {
TEST_PEM,
TEST_DER
} pkwrite_file_format_t;
/* Helper function for removing "\r" chars from a buffer. */
static void fix_new_lines(unsigned char *in_str, size_t *len)
{
size_t chars_left;
unsigned int i;
for (i = 0; (i < *len) && (*len > 0); i++) {
if (in_str[i] == '\r') {
if (i < (*len - 1)) {
chars_left = *len - i - 1;
memmove(&in_str[i], &in_str[i+1], chars_left);
} else {
in_str[i] = '\0';
}
*len = *len - 1;
}
}
}
static void pk_write_check_common(char *key_file, int is_public_key, int is_der)
{
mbedtls_pk_context key;
unsigned char *buf = NULL;
unsigned char *check_buf = NULL;
unsigned char *start_buf;
size_t buf_len, check_buf_len;
int ret;
mbedtls_pk_init(&key);
USE_PSA_INIT();
/* Note: if mbedtls_pk_load_file() successfully reads the file, then
it also allocates check_buf, which should be freed on exit */
TEST_EQUAL(mbedtls_pk_load_file(key_file, &check_buf, &check_buf_len), 0);
TEST_ASSERT(check_buf_len > 0);
/* Windows' line ending is different from the Linux's one ("\r\n" vs "\n").
* Git treats PEM files as text, so when on Windows, it replaces new lines
* with "\r\n" on checkout.
* Unfortunately mbedtls_pk_load_file() loads files in binary format,
* while mbedtls_pk_write_pubkey_pem() goes through the I/O layer which
* uses "\n" for newlines in both Windows and Linux.
* Here we remove the extra "\r" so that "buf" and "check_buf" can be
* easily compared later. */
if (!is_der) {
fix_new_lines(check_buf, &check_buf_len);
}
TEST_ASSERT(check_buf_len > 0);
ASSERT_ALLOC(buf, check_buf_len);
if (is_public_key) {
TEST_EQUAL(mbedtls_pk_parse_public_keyfile(&key, key_file), 0);
if (is_der) {
ret = mbedtls_pk_write_pubkey_der(&key, buf, check_buf_len);
} else {
#if defined(MBEDTLS_PEM_WRITE_C)
ret = mbedtls_pk_write_pubkey_pem(&key, buf, check_buf_len);
#else
ret = MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
#endif
}
} else {
TEST_EQUAL(mbedtls_pk_parse_keyfile(&key, key_file, NULL,
mbedtls_test_rnd_std_rand, NULL), 0);
if (is_der) {
ret = mbedtls_pk_write_key_der(&key, buf, check_buf_len);
} else {
#if defined(MBEDTLS_PEM_WRITE_C)
ret = mbedtls_pk_write_key_pem(&key, buf, check_buf_len);
#else
ret = MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
#endif
}
}
if (is_der) {
TEST_LE_U(1, ret);
buf_len = ret;
start_buf = buf + check_buf_len - buf_len;
} else {
TEST_EQUAL(ret, 0);
buf_len = strlen((char *) buf) + 1; /* +1 takes the string terminator into account */
start_buf = buf;
}
ASSERT_COMPARE(start_buf, buf_len, check_buf, check_buf_len);
exit:
mbedtls_free(buf);
mbedtls_free(check_buf);
mbedtls_pk_free(&key);
USE_PSA_DONE();
}
/* END_HEADER */
/* BEGIN_DEPENDENCIES
* depends_on:MBEDTLS_PK_PARSE_C:MBEDTLS_PK_WRITE_C:MBEDTLS_BIGNUM_C:MBEDTLS_FS_IO
* END_DEPENDENCIES
*/
/* BEGIN_CASE */
void pk_write_pubkey_check(char *key_file, int is_der)
{
pk_write_check_common(key_file, 1, is_der);
goto exit; /* make the compiler happy */
}
/* END_CASE */
/* BEGIN_CASE */
void pk_write_key_check(char *key_file, int is_der)
{
pk_write_check_common(key_file, 0, is_der);
goto exit; /* make the compiler happy */
}
/* END_CASE */