int GTHTTP_verifyTimestampHash(const GTTimestamp *ts,
const GTDataHash *hash,
const char *ext_url, GTTimestamp **ext_ts,
const GTPublicationsFile *pub, const char *pub_url,
int parse, GTVerificationInfo **ver)
{
int res = GT_UNKNOWN_ERROR;
GTPublicationsFile *pub_tmp = NULL;
GTPubFileVerificationInfo *pub_ver = NULL;
GTVerificationInfo *ver_tmp = NULL;
GTTimestamp *ext = NULL;
int is_ext = 0, is_new = 0;
if (ts == NULL || hash == NULL || ver == NULL) {
res = GT_INVALID_ARGUMENT;
goto cleanup;
}
if ((pub != NULL) + (pub_url != NULL) != 1) {
res = GT_INVALID_ARGUMENT;
goto cleanup;
}
/* Ensure we have a valid publications file. */
if (pub == NULL) {
res = GTHTTP_getPublicationsFile(pub_url, &pub_tmp);
if (res != GT_OK) {
goto cleanup;
}
pub = pub_tmp;
}
res = GTPublicationsFile_verify(pub, &pub_ver);
if (res != GT_OK) {
goto cleanup;
}
/* Check internal consistency of the timestamp. */
res = GTTimestamp_verify(ts, parse, &ver_tmp);
if (res != GT_OK) {
goto cleanup;
}
if (ver_tmp == NULL || ver_tmp->implicit_data == NULL) {
res = GT_UNKNOWN_ERROR;
goto cleanup;
}
if (ver_tmp->verification_errors != GT_NO_FAILURES) {
goto cleanup;
}
/* Check document hash.
* GT_WRONG_DOCUMENT means the hash did not match.
* Everything else is some sort of system error. */
res = GTTimestamp_checkDocumentHash(ts, hash);
if (res == GT_OK) {
ver_tmp->verification_status |= GT_DOCUMENT_HASH_CHECKED;
} else if (res == GT_WRONG_DOCUMENT) {
ver_tmp->verification_status |= GT_DOCUMENT_HASH_CHECKED;
ver_tmp->verification_errors |= GT_WRONG_DOCUMENT_FAILURE;
res = GT_OK;
goto cleanup;
} else {
goto cleanup;
}
/* Whether the timestamp is extended. */
is_ext = ((ver_tmp->verification_status & GT_PUBLIC_KEY_SIGNATURE_PRESENT) == 0);
/* Whether it is too new to be extended. */
is_new = (ver_tmp->implicit_data->registered_time > pub_ver->last_publication_time);
/* If the timestamp is already extended, "promote" it.
* If it is not extended, but is old enough, attempt to extend it. */
if (is_ext) {
ext = (GTTimestamp *) ts;
} else if (!is_new && ext_url != NULL) {
res = GTHTTP_extendTimestamp(ts, ext_url, &ext);
/* If extending fails because of infrastructure failure, fall
* back to signing key check. Else report errors. */
if (res == GT_NONSTD_EXTEND_LATER || res == GT_NONSTD_EXTENSION_OVERDUE ||
(res >= GTHTTP_IMPL_BASE && res <= GTHTTP_HIGHEST)) {
res = GT_OK;
}
if (res != GT_OK) {
goto cleanup;
}
}
/* If we now have a new timestamp, check internal consistency and document hash. */
if (ext != NULL && ext != ts) {
/* Release the old verification info. */
GTVerificationInfo_free(ver_tmp);
ver_tmp = NULL;
/* Re-check consistency. */
res = GTTimestamp_verify(ext, parse, &ver_tmp);
if (res != GT_OK) {
goto cleanup;
}
if (ver_tmp == NULL || ver_tmp->implicit_data == NULL) {
res = GT_UNKNOWN_ERROR;
goto cleanup;
}
if (ver_tmp->verification_errors != GT_NO_FAILURES) {
goto cleanup;
}
/* Re-check document hash. */
res = GTTimestamp_checkDocumentHash(ts, hash);
if (res == GT_OK) {
ver_tmp->verification_status |= GT_DOCUMENT_HASH_CHECKED;
} else if (res == GT_WRONG_DOCUMENT) {
ver_tmp->verification_status |= GT_DOCUMENT_HASH_CHECKED;
ver_tmp->verification_errors |= GT_WRONG_DOCUMENT_FAILURE;
res = GT_OK;
goto cleanup;
} else {
goto cleanup;
}
}
if (ext != NULL) {
/* If we now have an extended timestamp, check publication.
* GT_TRUST_POINT_NOT_FOUND and GT_INVALID_TRUST_POINT mean it did not match.
* Everything else is some sort of system error. */
res = GTTimestamp_checkPublication(ext, pub);
if (res == GT_OK) {
ver_tmp->verification_status |= GT_PUBLICATION_CHECKED;
} else if (res == GT_TRUST_POINT_NOT_FOUND || res == GT_INVALID_TRUST_POINT) {
ver_tmp->verification_status |= GT_PUBLICATION_CHECKED;
ver_tmp->verification_errors |= GT_NOT_VALID_PUBLICATION;
res = GT_OK;
}
} else {
/* Otherwise, check signing key.
* GT_KEY_NOT_PUBLISHED and GT_CERT_TICKET_TOO_OLD mean key not valid.
* Everything else is some sort of system error. */
res = GTTimestamp_checkPublicKey(ts, ver_tmp->implicit_data->registered_time, pub);
if (res == GT_OK) {
ver_tmp->verification_status |= GT_PUBLICATION_CHECKED;
} else if (res == GT_KEY_NOT_PUBLISHED || res == GT_CERT_TICKET_TOO_OLD) {
ver_tmp->verification_status |= GT_PUBLICATION_CHECKED;
ver_tmp->verification_errors |= GT_NOT_VALID_PUBLIC_KEY_FAILURE;
res = GT_OK;
}
}
cleanup:
if (res == GT_OK) {
if (ext_ts != NULL && ext != NULL && ext != ts &&
ver_tmp->verification_errors == GT_NO_FAILURES) {
*ext_ts = ext;
ext = NULL;
}
*ver = ver_tmp;
ver_tmp = NULL;
}
if (ext != ts) {
GTTimestamp_free(ext);
}
GTVerificationInfo_free(ver_tmp);
GTPubFileVerificationInfo_free(pub_ver);
GTPublicationsFile_free(pub_tmp);
return res;
}
int GTPublicationsFile_DERDecode(const void *data, size_t data_length,
GTPublicationsFile **publications_file)
{
int retval = GT_UNKNOWN_ERROR;
GTPublicationsFile *tmp_publications_file = NULL;
if ((data == NULL && data_length != 0) || publications_file == NULL) {
retval = GT_INVALID_ARGUMENT;
goto cleanup;
}
tmp_publications_file = GT_malloc(sizeof(GTPublicationsFile));
if (tmp_publications_file == NULL) {
retval = GT_OUT_OF_MEMORY;
goto cleanup;
}
/* Do not waste time with copying of data until we are sure that input data
* is correct. */
tmp_publications_file->data = data;
tmp_publications_file->data_length = data_length;
tmp_publications_file->data_owner = 0;
tmp_publications_file->publication_cells = NULL;
tmp_publications_file->key_hash_cells = NULL;
tmp_publications_file->pub_reference = NULL;
tmp_publications_file->signature = NULL;
retval = decodeHeader(tmp_publications_file);
if (retval != GT_OK) {
goto cleanup;
}
retval = decodePublicationCells(tmp_publications_file);
if (retval != GT_OK) {
goto cleanup;
}
retval = decodeKeyHashCells(tmp_publications_file);
if (retval != GT_OK) {
goto cleanup;
}
retval = decodePubReference(tmp_publications_file);
if (retval != GT_OK) {
goto cleanup;
}
retval = decodeSignature(tmp_publications_file);
if (retval != GT_OK) {
goto cleanup;
}
retval = GT_UNKNOWN_ERROR;
tmp_publications_file->data = GT_malloc(data_length);
if (tmp_publications_file->data == NULL) {
retval = GT_OUT_OF_MEMORY;
goto cleanup;
}
memcpy((void*) tmp_publications_file->data, data, data_length);
tmp_publications_file->data_owner = 1;
*publications_file = tmp_publications_file;
tmp_publications_file = NULL;
retval = GT_OK;
cleanup:
GTPublicationsFile_free(tmp_publications_file);
return retval;
}
