219 lines
6.7 KiB
C
219 lines
6.7 KiB
C
/* BEGIN_HEADER */
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#include "mbedtls/pk.h"
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#include "mbedtls/pem.h"
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#include "mbedtls/oid.h"
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#include "psa/crypto_sizes.h"
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typedef enum {
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TEST_PEM,
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TEST_DER
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} pkwrite_file_format_t;
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/* Helper function for removing "\r" chars from a buffer. */
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static void fix_new_lines(unsigned char *in_str, size_t *len)
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{
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size_t chars_left;
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unsigned int i;
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for (i = 0; (i < *len) && (*len > 0); i++) {
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if (in_str[i] == '\r') {
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if (i < (*len - 1)) {
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chars_left = *len - i - 1;
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memmove(&in_str[i], &in_str[i+1], chars_left);
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} else {
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in_str[i] = '\0';
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}
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*len = *len - 1;
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}
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}
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}
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static int pk_write_any_key(mbedtls_pk_context *pk, unsigned char **p,
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size_t *buf_len, int is_public_key, int is_der)
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{
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int ret = 0;
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if (is_der) {
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if (is_public_key) {
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ret = mbedtls_pk_write_pubkey_der(pk, *p, *buf_len);
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} else {
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ret = mbedtls_pk_write_key_der(pk, *p, *buf_len);
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}
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if (ret <= 0) {
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return ret;
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}
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*p = *p + *buf_len - ret;
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*buf_len = ret;
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} else {
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#if defined(MBEDTLS_PEM_WRITE_C)
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if (is_public_key) {
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ret = mbedtls_pk_write_pubkey_pem(pk, *p, *buf_len);
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} else {
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ret = mbedtls_pk_write_key_pem(pk, *p, *buf_len);
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}
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if (ret != 0) {
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return ret;
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}
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*buf_len = strlen((char *) *p) + 1; /* +1 takes the string terminator into account */
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#else
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return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
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#endif
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}
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return 0;
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}
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static void pk_write_check_common(char *key_file, int is_public_key, int is_der)
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{
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mbedtls_pk_context key;
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unsigned char *buf = NULL;
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unsigned char *check_buf = NULL;
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unsigned char *start_buf;
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size_t buf_len, check_buf_len;
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#if defined(MBEDTLS_USE_PSA_CRYPTO)
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mbedtls_svc_key_id_t opaque_id = MBEDTLS_SVC_KEY_ID_INIT;
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#endif /* MBEDTLS_USE_PSA_CRYPTO */
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USE_PSA_INIT();
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mbedtls_pk_init(&key);
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USE_PSA_INIT();
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/* Note: if mbedtls_pk_load_file() successfully reads the file, then
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it also allocates check_buf, which should be freed on exit */
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TEST_EQUAL(mbedtls_pk_load_file(key_file, &check_buf, &check_buf_len), 0);
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TEST_ASSERT(check_buf_len > 0);
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/* Windows' line ending is different from the Linux's one ("\r\n" vs "\n").
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* Git treats PEM files as text, so when on Windows, it replaces new lines
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* with "\r\n" on checkout.
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* Unfortunately mbedtls_pk_load_file() loads files in binary format,
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* while mbedtls_pk_write_pubkey_pem() goes through the I/O layer which
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* uses "\n" for newlines in both Windows and Linux.
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* Here we remove the extra "\r" so that "buf" and "check_buf" can be
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* easily compared later. */
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if (!is_der) {
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fix_new_lines(check_buf, &check_buf_len);
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}
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TEST_ASSERT(check_buf_len > 0);
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TEST_CALLOC(buf, check_buf_len);
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if (is_public_key) {
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TEST_EQUAL(mbedtls_pk_parse_public_keyfile(&key, key_file), 0);
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} else {
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TEST_EQUAL(mbedtls_pk_parse_keyfile(&key, key_file, NULL,
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mbedtls_test_rnd_std_rand, NULL), 0);
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}
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start_buf = buf;
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buf_len = check_buf_len;
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TEST_EQUAL(pk_write_any_key(&key, &start_buf, &buf_len, is_public_key,
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is_der), 0);
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TEST_MEMORY_COMPARE(start_buf, buf_len, check_buf, check_buf_len);
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#if defined(MBEDTLS_USE_PSA_CRYPTO)
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/* Verify that pk_write works also for opaque private keys */
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if (!is_public_key) {
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memset(buf, 0, check_buf_len);
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TEST_EQUAL(mbedtls_pk_wrap_as_opaque(&key, &opaque_id,
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PSA_ALG_NONE,
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PSA_KEY_USAGE_EXPORT,
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PSA_ALG_NONE), 0);
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start_buf = buf;
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buf_len = check_buf_len;
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TEST_EQUAL(pk_write_any_key(&key, &start_buf, &buf_len, is_public_key,
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is_der), 0);
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TEST_MEMORY_COMPARE(start_buf, buf_len, check_buf, check_buf_len);
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}
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#endif /* MBEDTLS_USE_PSA_CRYPTO */
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exit:
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#if defined(MBEDTLS_USE_PSA_CRYPTO)
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psa_destroy_key(opaque_id);
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#endif /* MBEDTLS_USE_PSA_CRYPTO */
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mbedtls_free(buf);
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mbedtls_free(check_buf);
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mbedtls_pk_free(&key);
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USE_PSA_DONE();
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}
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/* END_HEADER */
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/* BEGIN_DEPENDENCIES
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* depends_on:MBEDTLS_PK_PARSE_C:MBEDTLS_PK_WRITE_C:MBEDTLS_FS_IO
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* END_DEPENDENCIES
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*/
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/* BEGIN_CASE */
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void pk_write_pubkey_check(char *key_file, int is_der)
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{
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pk_write_check_common(key_file, 1, is_der);
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goto exit; /* make the compiler happy */
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void pk_write_key_check(char *key_file, int is_der)
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{
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pk_write_check_common(key_file, 0, is_der);
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goto exit; /* make the compiler happy */
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void pk_write_public_from_private(char *priv_key_file, char *pub_key_file)
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{
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mbedtls_pk_context priv_key;
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uint8_t *derived_key_raw = NULL;
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size_t derived_key_len = 0;
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uint8_t *pub_key_raw = NULL;
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size_t pub_key_len = 0;
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#if defined(MBEDTLS_USE_PSA_CRYPTO)
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mbedtls_svc_key_id_t opaque_key_id = MBEDTLS_SVC_KEY_ID_INIT;
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#endif /* MBEDTLS_USE_PSA_CRYPTO */
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mbedtls_pk_init(&priv_key);
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USE_PSA_INIT();
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TEST_EQUAL(mbedtls_pk_parse_keyfile(&priv_key, priv_key_file, NULL,
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mbedtls_test_rnd_std_rand, NULL), 0);
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TEST_EQUAL(mbedtls_pk_load_file(pub_key_file, &pub_key_raw,
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&pub_key_len), 0);
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derived_key_len = pub_key_len;
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TEST_CALLOC(derived_key_raw, derived_key_len);
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TEST_EQUAL(mbedtls_pk_write_pubkey_der(&priv_key, derived_key_raw,
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derived_key_len), pub_key_len);
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TEST_MEMORY_COMPARE(derived_key_raw, derived_key_len,
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pub_key_raw, pub_key_len);
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#if defined(MBEDTLS_USE_PSA_CRYPTO)
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mbedtls_platform_zeroize(derived_key_raw, derived_key_len);
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TEST_EQUAL(mbedtls_pk_wrap_as_opaque(&priv_key, &opaque_key_id,
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PSA_ALG_NONE, PSA_KEY_USAGE_EXPORT,
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PSA_ALG_NONE), 0);
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TEST_EQUAL(mbedtls_pk_write_pubkey_der(&priv_key, derived_key_raw,
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derived_key_len), pub_key_len);
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TEST_MEMORY_COMPARE(derived_key_raw, derived_key_len,
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pub_key_raw, pub_key_len);
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#endif /* MBEDTLS_USE_PSA_CRYPTO */
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exit:
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#if defined(MBEDTLS_USE_PSA_CRYPTO)
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psa_destroy_key(opaque_key_id);
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#endif /* MBEDTLS_USE_PSA_CRYPTO */
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mbedtls_free(derived_key_raw);
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mbedtls_free(pub_key_raw);
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mbedtls_pk_free(&priv_key);
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USE_PSA_DONE();
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}
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/* END_CASE */
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