/* Verifies signature for the local file DATA_FILENAME first, and on failure
* downloads the signature based on DATA_URL and tries to verify again.
*
* returns: true if signature verification succeeded, false if verification
* failed, or the signature download failed
*/
bool download_and_verify_signature(const char *data_url, const char *data_filename)
{
char *sig_url;
char *sig_filename;
int ret;
bool result;
if (!sigcheck) {
return false;
}
string_or_die(&sig_url, "%s.sig", data_url);
string_or_die(&sig_filename, "%s.sig", data_filename);
// Try verifying a local copy of the signature first
result = verify_signature(data_filename, sig_filename, false);
if (result) {
goto out;
}
// Else, download a fresh signature, and verify
ret = swupd_curl_get_file(sig_url, sig_filename, NULL, NULL, false);
if (ret == 0) {
result = verify_signature(data_filename, sig_filename, true);
} else {
// download failed
result = false;
}
out:
free(sig_filename);
free(sig_url);
return result;
}
void verify_page(fz_context *ctx, pdf_document *doc, int n, pdf_page *page)
{
pdf_widget *widget;
for (widget = pdf_first_widget(ctx, page); widget; widget = pdf_next_widget(ctx, widget))
if (pdf_widget_type(ctx, widget) == PDF_WIDGET_TYPE_SIGNATURE)
verify_signature(ctx, doc, n, widget);
}
int main(int argc, char *argv[])
{
if (argc != 2)
fail("usage: sceverify filename");
ptr = mmap_file(argv[1]);
type = be16(ptr + 0x0a);
if (type == 1)
read_self_header();
else if(type == 3)
read_pkg_header();
else if(type == 4)
read_spp_header();
else
fail("Unknown type: %d", type);
if (flags & 0x8000)
fail("devkit file; nothing to verify");
if (klist == NULL)
fail("no key found");
decrypt();
verify_signature();
verify_hashes();
if (did_fail)
printf(" * please not that the hash will always fail for "
"unaligned non-LOAD phdrs\n");
return 0;
}
void
inspect_key (SSL *ssl, const char *hostname)
{
verify_signature (ssl, hostname);
check_name (ssl, hostname);
}
bool PeerRequest::validate(const Lock& lock) const
{
bool validNym = false;
if (nym_) {
validNym = nym_->VerifyPseudonym();
} else {
otErr << __FUNCTION__ << ": invalid nym." << std::endl;
}
const bool validSyntax = proto::Validate(contract(lock), VERBOSE);
if (!validSyntax) {
otErr << __FUNCTION__ << ": invalid syntax." << std::endl;
}
if (1 > signatures_.size()) {
otErr << __FUNCTION__ << ": Missing signature." << std::endl;
return false;
}
bool validSig = false;
auto& signature = *signatures_.cbegin();
if (signature) { validSig = verify_signature(lock, *signature); }
if (!validSig) {
otErr << __FUNCTION__ << ": invalid signature." << std::endl;
}
return (validNym && validSyntax && validSig);
}
int
inline_gpg_verify(const char *content, size_t len, const char *keyring)
{
verify_signature(content, len, keyring, NULL);
return 0;
}
void
inspect_key (ssl_context *ssl, const char *hostname)
{
verify_signature (ssl, hostname);
// ssl_get_verify_result() already checks for CN / subjectAltName match
// and reports the mismatch as error. So check_name() is not called
}
void verify_page(fz_context *ctx, pdf_document *doc, int n, pdf_page *page)
{
pdf_annot *annot;
for (annot = pdf_first_annot(ctx, page); annot; annot = pdf_next_annot(ctx, annot))
if (pdf_annot_type(ctx, annot) == PDF_ANNOT_WIDGET)
if (pdf_widget_type(ctx, annot) == PDF_WIDGET_TYPE_SIGNATURE)
verify_signature(ctx, doc, n, annot);
}
bool verify_signature(const ec_uncompressed& point, const hash_digest& hash,
const ec_signature& signature)
{
secp256k1_pubkey pubkey;
const auto context = verification.context();
return parse(context, pubkey, point) &&
verify_signature(context, pubkey, hash, signature);
}
int verify_message_signature(notary_header *hdr, RSA* pub_key) {
int sig_len = ntohs(hdr->sig_len);
int data_len = ntohs(hdr->total_len) - sig_len - sizeof(notary_header);
char* data = (char*)(hdr + 1);
unsigned char *sig = (unsigned char*) (data + data_len);
DPRINTF(DEBUG_CRYPTO, "msg verify: data_len = %d sig_len = %d \n",
data_len, sig_len);
return verify_signature(data, data_len, pub_key, sig, sig_len);
}
bool verify_update_signature(dwindow_update_signature *signature)
{
if (!signature)
return false;
unsigned char sha1[20];
SHA1Hash(sha1, ((unsigned char*)signature) + sizeof(signature->signature),
sizeof(dwindow_update_signature) - sizeof(signature->signature));
return verify_signature((DWORD*)sha1, (DWORD*)signature->signature, dwindow_network_n);
}
int
main(int argc, char **argv)
{
GError *error = NULL;
int retval = EXIT_SUCCESS;
EVP_PKEY *pubkey;
if (!process_arguments(&argc, &argv, &error)) {
retval = handle_error(error);
g_clear_error(&error);
} else if ((pubkey = read_public_key(option_key_file, &error)) == NULL) {
retval = handle_error(error);
g_clear_error(&error);
} else {
FILE *infile = fopen(option_data_file, "rb");
if (infile == NULL) {
fprintf(stderr, "%s: %s\n", option_data_file, strerror(errno));
retval = EXIT_IO_ERROR;
} else {
uint8_t hash[SHA256_DIGEST_LENGTH];
uint8_t signature[SIGNATURE_SIZE];
if (fread(signature, 1, sizeof(signature), infile) !=
sizeof(signature)) {
if (ferror(infile)) {
fprintf(
stderr, "%s: %s\n", option_data_file, strerror(errno));
retval = EXIT_IO_ERROR;
} else {
fprintf(stderr,
"%s: File too short for signature\n",
option_data_file);
retval = EXIT_FORMAT_ERROR;
}
} else if (!hash_stream(infile, hash, &error) ||
!verify_signature(hash, signature, pubkey, &error)) {
retval = handle_error(error);
g_clear_error(&error);
} else if (option_out_file &&
!write_out_file(infile, option_out_file, &error)) {
retval = handle_error(error);
g_clear_error(&error);
}
fclose(infile);
}
EVP_PKEY_free(pubkey);
}
return retval;
}
int sigverify_main(int argc, char *argv[])
{
int opt;
static struct option long_options[] = {
{"help", no_argument, 0, 'h'},
{0, 0, 0, 0}
};
int long_index = 0;
while ((opt = getopt_long(argc, argv, "h", long_options, &long_index)) != -1) {
switch (opt) {
case 'h':
sigverify_usage(stdout);
return EXIT_SUCCESS;
default:
sigverify_usage(stderr);
return EXIT_FAILURE;
}
}
if (argc - optind != 2) {
sigverify_usage(stderr);
return EXIT_FAILURE;
}
#if COMPILE_ERROR_STRINGS
ERR_load_crypto_strings();
OpenSSL_add_all_algorithms();
#endif
const char *path = argv[optind];
const char *sig_path = argv[optind + 1];
SigVerifyResult result = verify_signature(path, sig_path);
switch (result) {
case SigVerifyResult::Valid:
return EXIT_SUCCESS;
case SigVerifyResult::Invalid:
return EXIT_INVALID;
case SigVerifyResult::Failure:
default:
return EXIT_FAILURE;
}
}
int _tmain()
{
const wchar_t* file_name = L"Diablo III Launcher.exe";
if (verify_signature(file_name) == true)
{
wprintf_s(L"The file \"%s\" is signed and the signature was verified.\n", file_name);
std::wstring signer = get_signer(file_name);
wprintf_s(L"%s signer is %s\n", file_name, signer.c_str());
}
else
{
wprintf_s(L"The file \"%s\" is not trusted.\n", file_name);
}
return 0;
}
/**
* Verifies "data" against "signature".
*
* @return TRUE if the signature matches.
*/
bool
svn_release_notification_verify(uint32 revision, time_t date,
const struct array *signature)
{
char rev[12], data[64];
struct array input;
uint32_to_string_buf(revision, rev, sizeof rev);
input.data = (void *) data;
input.size = concat_strings(data, sizeof data,
"r", rev,
"@", uint32_to_string(date),
(void *) 0);
return verify_signature(svn_release_notify_certificate(),
&input, signature);
}
retvalue signature_check(const struct signature_requirement *requirements, const char *releasegpg, const char *releasename, const char *releasedata, size_t releaselen) {
gpg_error_t err;
int gpgfd;
gpgme_data_t dh, dh_gpg;
assert (requirements != NULL);
if (FAILEDTOALLOC(releasedata) || FAILEDTOALLOC(releasegpg))
return RET_ERROR_OOM;
assert (context != NULL);
/* Read the file and its signature into memory: */
gpgfd = open(releasegpg, O_RDONLY|O_NOCTTY);
if (gpgfd < 0) {
int e = errno;
fprintf(stderr, "Error opening '%s': %s\n",
releasegpg, strerror(e));
return RET_ERRNO(e);
}
err = gpgme_data_new_from_fd(&dh_gpg, gpgfd);
if (err != 0) {
(void)close(gpgfd);
fprintf(stderr, "Error reading '%s':\n", releasegpg);
return gpgerror(err);
}
err = gpgme_data_new_from_mem(&dh, releasedata, releaselen, 0);
if (err != 0) {
gpgme_data_release(dh_gpg);
return gpgerror(err);
}
/* Verify the signature */
err = gpgme_op_verify(context, dh_gpg, dh, NULL);
gpgme_data_release(dh_gpg);
gpgme_data_release(dh);
close(gpgfd);
if (err != 0) {
fprintf(stderr, "Error verifying '%s':\n", releasegpg);
return gpgerror(err);
}
return verify_signature(requirements, releasegpg, releasename);
}
/**
* Given the file name of a signed boot image, verifies the signature
* @param image_file Name of the boot image file
*/
static int verify(const char *image_file)
{
BootSignature *bs = NULL;
int fd = -1;
int rc = 1;
off64_t offset = 0;
if (!image_file) {
return rc;
}
if ((fd = open(image_file, O_RDONLY | O_LARGEFILE)) == -1) {
return rc;
}
if (get_signature_offset(fd, &offset) == -1) {
goto out;
}
if (read_signature(fd, offset, &bs) == -1) {
goto out;
}
if (validate_signature_block(bs, offset) == -1) {
goto out;
}
if (verify_signature(fd, offset, bs) == -1) {
goto out;
}
printf("Signature is VALID\n");
rc = 0;
out:
if (bs) {
BootSignature_free(bs);
}
if (fd != -1) {
close(fd);
}
return rc;
}
static bool check_signature(const char *path, const char *sig_path)
{
SigVerifyResult result;
result = verify_signature(path, sig_path);
switch (result) {
case SigVerifyResult::VALID:
return true;
case SigVerifyResult::INVALID:
LOGE("%s: Invalid signature", path);
return false;
case SigVerifyResult::FAILURE:
LOGE("%s: Failed to check signature", path);
return false;
default:
assert(false);
return false;
}
}
static bool process_hunk(char const *program,
struct notify_info *notify,
struct memory_block_data const *payload,
struct memory_block_signature const *signature)
{
struct signature_algorithm *sigalg = NULL;
struct decompression_algorithm *decompalg = NULL;
sigalg = create_sigalg(signature);
if (!sigalg)
goto err;
decompalg = create_decompress(payload);
if (!decompalg && payload->compression != STREAM_COMPRESS_NONE)
goto err;
if (!send_stream(program, notify, payload, sigalg, decompalg))
goto err;
if (!signature_update(sigalg, payload->mem.stream->extra_salt,
payload->mem.stream->extra_salt_len) ||
!signature_update(sigalg, signature->shdr->salt,
sizeof signature->shdr->salt) ||
!signature_update(sigalg, signature->hhdr,
sizeof *signature->hhdr))
goto err;
if (signature->mem.len && !verify_signature(signature, sigalg))
goto err;
if (!finish_stream(program, payload, sigalg))
goto err;
signature_free(sigalg);
return true;
err:
decompression_free(decompalg);
signature_free(sigalg);
return false;
}
int
detached_gpg_verify(const char *content, size_t len,
const char *signature, size_t signature_len, const char *keyring)
{
int fd;
const char *tmpdir;
char *tempsig;
ssize_t ret;
if (gpg_cmd == NULL) {
warnx("GPG variable not set, failing signature check");
return -1;
}
if ((tmpdir = getenv("TMPDIR")) == NULL)
tmpdir = "/tmp";
tempsig = xasprintf("%s/pkg_install.XXXXXX", tmpdir);
fd = mkstemp(tempsig);
if (fd == -1) {
warnx("Creating temporary file for GPG signature failed");
return -1;
}
while (signature_len) {
ret = write(fd, signature, signature_len);
if (ret == -1)
err(EXIT_FAILURE, "Write to GPG failed");
if (ret == 0)
errx(EXIT_FAILURE, "Short write to GPG");
signature_len -= ret;
signature += ret;
}
verify_signature(content, len, keyring, tempsig);
unlink(tempsig);
close(fd);
free(tempsig);
return 0;
}
static gpg_error_t
collect_signature (void *cookie, const char *data)
{
receive_ctx_t ctx = cookie;
if (!ctx->signature)
if (!(ctx->signature = es_fopenmem (MAX_SIGNATURE, "w+b,samethread")))
return gpg_error_from_syserror ();
if (data)
es_fputs (data, ctx->signature);
if (es_ferror (ctx->signature))
return gpg_error_from_syserror ();
if (!data)
{
verify_signature (ctx);
}
return 0;
}
int asymmetric_verify(struct key *keyring, const char *sig,
int siglen, const char *data, int datalen)
{
struct public_key_signature pks;
struct signature_v2_hdr *hdr = (struct signature_v2_hdr *)sig;
struct key *key;
int ret = -ENOMEM;
if (siglen <= sizeof(*hdr))
return -EBADMSG;
siglen -= sizeof(*hdr);
if (siglen != __be16_to_cpu(hdr->sig_size))
return -EBADMSG;
if (hdr->hash_algo >= PKEY_HASH__LAST)
return -ENOPKG;
key = request_asymmetric_key(keyring, __be32_to_cpu(hdr->keyid));
if (IS_ERR(key))
return PTR_ERR(key);
memset(&pks, 0, sizeof(pks));
pks.pkey_hash_algo = hdr->hash_algo;
pks.digest = (u8 *)data;
pks.digest_size = datalen;
pks.nr_mpi = 1;
pks.rsa.s = mpi_read_raw_data(hdr->sig, siglen);
if (pks.rsa.s)
ret = verify_signature(key, &pks);
mpi_free(pks.rsa.s);
key_put(key);
pr_debug("%s() = %d\n", __func__, ret);
return ret;
}
/**
* restrict_link_by_signature - Restrict additions to a ring of public keys
* @trust_keyring: A ring of keys that can be used to vouch for the new cert.
* @type: The type of key being added.
* @payload: The payload of the new key.
*
* Check the new certificate against the ones in the trust keyring. If one of
* those is the signing key and validates the new certificate, then mark the
* new certificate as being trusted.
*
* Returns 0 if the new certificate was accepted, -ENOKEY if we couldn't find a
* matching parent certificate in the trusted list, -EKEYREJECTED if the
* signature check fails or the key is blacklisted and some other error if
* there is a matching certificate but the signature check cannot be performed.
*/
int restrict_link_by_signature(struct key *trust_keyring,
const struct key_type *type,
const union key_payload *payload)
{
const struct public_key_signature *sig;
struct key *key;
int ret;
pr_devel("==>%s()\n", __func__);
if (!trust_keyring)
return -ENOKEY;
if (type != &key_type_asymmetric)
return -EOPNOTSUPP;
sig = payload->data[asym_auth];
if (!sig->auth_ids[0] && !sig->auth_ids[1])
return -ENOKEY;
if (ca_keyid && !asymmetric_key_id_partial(sig->auth_ids[1], ca_keyid))
return -EPERM;
/* See if we have a key that signed this one. */
key = find_asymmetric_key(trust_keyring,
sig->auth_ids[0], sig->auth_ids[1],
false);
if (IS_ERR(key))
return -ENOKEY;
if (use_builtin_keys && !test_bit(KEY_FLAG_BUILTIN, &key->flags))
ret = -ENOKEY;
else
ret = verify_signature(key, sig);
key_put(key);
return ret;
}
static void *worker_loop(void *ignored) {
bool keep_running = true;
while(keep_running) {
brine_task_s *task = (brine_task_s *) brine_queue_dequeue(queue);
if (!task) {
keep_running = false;
break;
}
switch(task->cmd) {
case BRINE_STOP:
keep_running = false;
break;
case BRINE_NEW_KEYPAIR:
generate_keypair(task);
break;
case BRINE_NEW_KEYPAIR_FROM_SEED:
generate_keypair_from_seed(task);
break;
case BRINE_SIGN_MSG:
sign_message(task);
break;
case BRINE_VERIFY:
verify_signature(task);
break;
case BRINE_TO_BINARY:
keypair_to_binary(task);
break;
case BRINE_TO_KEYPAIR:
binary_to_keypair(task);
break;
default:
break;
}
brine_task_destroy(&task);
}
return NULL;
}
TEST_FIXTURE(HandshakeFixture, VerifiedSignatureIsHMAC)
{
int err = verify_signature(signature, pubkey, expected_hmac);
CHECK_EQUAL(0, err);
}
static themis_status_t secure_session_finish_server(secure_session_t *session_ctx, const void *data, size_t data_length, void *output, size_t *output_length)
{
const soter_container_hdr_t *proto_message = data;
soter_container_hdr_t *response_message;
themis_status_t res;
const uint8_t *mac;
size_t mac_length = 0;
const uint8_t *signature;
size_t signature_length;
soter_kdf_context_buf_t sign_data[4];
uint8_t ecdh_key[1024];
size_t ecdh_key_length = sizeof(ecdh_key);
uint8_t shared_secret[1024];
size_t shared_secret_length = sizeof(shared_secret);
if (data_length < sizeof(soter_container_hdr_t))
{
return THEMIS_INVALID_PARAMETER;
}
if (memcmp(proto_message->tag, THEMIS_SESSION_PROTO_TAG, SOTER_CONTAINER_TAG_LENGTH))
{
return THEMIS_INVALID_PARAMETER;
}
if (data_length < (soter_container_data_size(proto_message) + sizeof(soter_container_hdr_t)))
{
return THEMIS_INVALID_PARAMETER;
}
if (THEMIS_SUCCESS != soter_verify_container_checksum(proto_message))
{
return THEMIS_INVALID_PARAMETER;
}
/* Get length of used mac */
res = compute_mac(session_ctx->peer.ecdh_key, session_ctx->peer.ecdh_key_length, NULL, 0, NULL, &mac_length);
if (THEMIS_BUFFER_TOO_SMALL != res)
{
return res;
}
signature_length = soter_container_data_size(proto_message) - mac_length;
signature = soter_container_const_data(proto_message);
mac = signature + signature_length;
res = soter_asym_ka_export_key(&(session_ctx->ecdh_ctx), ecdh_key, &ecdh_key_length, false);
if (THEMIS_SUCCESS != res)
{
return res;
}
sign_data[0].data = session_ctx->peer.ecdh_key;
sign_data[0].length = session_ctx->peer.ecdh_key_length;
sign_data[1].data = ecdh_key;
sign_data[1].length = ecdh_key_length;
sign_data[2].data = session_ctx->peer.id;
sign_data[2].length = session_ctx->peer.id_length;
sign_data[3].data = session_ctx->we.id;
sign_data[3].length = session_ctx->we.id_length;
res = verify_signature(session_ctx->peer.sign_key, session_ctx->peer.sign_key_length, sign_data, 4, signature, signature_length);
if (THEMIS_SUCCESS != res)
{
return res;
}
res = soter_asym_ka_derive(&(session_ctx->ecdh_ctx), session_ctx->peer.ecdh_key, session_ctx->peer.ecdh_key_length, shared_secret, &shared_secret_length);
if (THEMIS_SUCCESS != res)
{
return res;
}
res = soter_kdf(NULL, 0, SESSION_ID_GENERATION_LABEL, sign_data, 4, &(session_ctx->session_id), sizeof(session_ctx->session_id));
if (THEMIS_SUCCESS != res)
{
return res;
}
sign_data[0].data = (const uint8_t *)(&(session_ctx->session_id));
sign_data[0].length = sizeof(session_ctx->session_id);
res = soter_kdf(shared_secret, shared_secret_length, SESSION_MASTER_KEY_GENERATION_LABEL, sign_data, 1, session_ctx->session_master_key, sizeof(session_ctx->session_master_key));
if (THEMIS_SUCCESS != res)
{
return res;
}
sign_data[0].data = ecdh_key;
sign_data[0].length = ecdh_key_length;
sign_data[1].data = (const uint8_t *)(&(session_ctx->session_id));
sign_data[1].length = sizeof(session_ctx->session_id);
res = verify_mac(session_ctx->session_master_key, sizeof(session_ctx->session_master_key), sign_data, 2, mac, mac_length);
if (THEMIS_SUCCESS != res)
{
return res;
}
sign_data[0].data = session_ctx->peer.ecdh_key;
sign_data[0].length = session_ctx->peer.ecdh_key_length;
/* we will reuse ecdh_key buffer for mac response computation */
ecdh_key_length = sizeof(ecdh_key) - sizeof(soter_container_hdr_t);
response_message = (soter_container_hdr_t *)ecdh_key;
res = compute_mac(session_ctx->session_master_key, sizeof(session_ctx->session_master_key), sign_data, 2, soter_container_data(response_message), &ecdh_key_length);
if (THEMIS_SUCCESS != res)
{
return res;
}
if ((NULL == output) || (*output_length < (ecdh_key_length + sizeof(soter_container_hdr_t))))
{
*output_length = ecdh_key_length + sizeof(soter_container_hdr_t);
return THEMIS_BUFFER_TOO_SMALL;
}
*output_length = ecdh_key_length + sizeof(soter_container_hdr_t);
res = secure_session_derive_message_keys(session_ctx);
if (THEMIS_SUCCESS != res)
{
return res;
}
memcpy(response_message->tag, THEMIS_SESSION_PROTO_TAG, SOTER_CONTAINER_TAG_LENGTH);
soter_container_set_data_size(response_message, ecdh_key_length);
soter_update_container_checksum(response_message);
memcpy(output, ecdh_key, soter_container_data_size(response_message) + sizeof(soter_container_hdr_t));
/* "Server mode": negotiation completed */
session_ctx->state_handler = NULL;
if (session_ctx->user_callbacks->state_changed)
{
session_ctx->user_callbacks->state_changed(STATE_ESTABLISHED, session_ctx->user_callbacks->user_data);
}
return res;
}
static themis_status_t secure_session_proceed_client(secure_session_t *session_ctx, const void *data, size_t data_length, void *output, size_t *output_length)
{
const soter_container_hdr_t *proto_message = data;
const soter_container_hdr_t *peer_id;
const soter_container_hdr_t *peer_ecdh_key;
size_t peer_ecdh_key_length;
const uint8_t *signature;
size_t signature_length;
themis_status_t res = THEMIS_SUCCESS;
soter_status_t soter_status;
uint8_t sign_key[1024]; /* Should be enough for RSA 8192 which is 512 bytes */
size_t sign_key_length;
uint8_t ecdh_key[1024];
size_t ecdh_key_length = sizeof(ecdh_key);
const soter_container_hdr_t *peer_sign_key;
soter_kdf_context_buf_t sign_data[4];
uint8_t *data_to_send = output;
size_t length_to_send;
soter_container_hdr_t *container;
uint8_t *mac;
if (data_length < sizeof(soter_container_hdr_t))
{
return THEMIS_INVALID_PARAMETER;
}
if (memcmp(proto_message->tag, THEMIS_SESSION_PROTO_TAG, SOTER_CONTAINER_TAG_LENGTH))
{
return THEMIS_INVALID_PARAMETER;
}
if (data_length < (soter_container_data_size(proto_message) + sizeof(soter_container_hdr_t)))
{
return THEMIS_INVALID_PARAMETER;
}
if (THEMIS_SUCCESS != soter_verify_container_checksum(proto_message))
{
return THEMIS_INVALID_PARAMETER;
}
peer_id = (const soter_container_hdr_t *)soter_container_const_data(proto_message);
if (memcmp(peer_id->tag, THEMIS_SESSION_ID_TAG, SOTER_CONTAINER_TAG_LENGTH))
{
return THEMIS_INVALID_PARAMETER;
}
if (THEMIS_SUCCESS != soter_verify_container_checksum(peer_id))
{
return THEMIS_INVALID_PARAMETER;
}
peer_ecdh_key = (const soter_container_hdr_t *)(soter_container_const_data(peer_id) + soter_container_data_size(peer_id));
if (memcmp(peer_ecdh_key->tag, EC_PUB_KEY_PREF, strlen(EC_PUB_KEY_PREF)))
{
return THEMIS_INVALID_PARAMETER;
}
peer_ecdh_key_length = ntohl(peer_ecdh_key->size);
signature = (const uint8_t *)peer_ecdh_key + peer_ecdh_key_length;
signature_length = (const uint8_t *)data + soter_container_data_size(proto_message) + sizeof(soter_container_hdr_t) - signature;
if (session_ctx->user_callbacks->get_public_key_for_id(soter_container_const_data(peer_id), soter_container_data_size(peer_id), sign_key, sizeof(sign_key), session_ctx->user_callbacks->user_data))
{
return THEMIS_SSESSION_GET_PUB_FOR_ID_CALLBACK_ERROR;
}
peer_sign_key = (const soter_container_hdr_t *)sign_key;
if (memcmp(peer_sign_key->tag, EC_PUB_KEY_PREF, strlen(EC_PUB_KEY_PREF)))
{
return THEMIS_INVALID_PARAMETER;
}
sign_key_length = ntohl(peer_sign_key->size);
if (sizeof(soter_container_hdr_t) >= sign_key_length)
{
return THEMIS_INVALID_PARAMETER;
}
soter_status = soter_asym_ka_export_key(&(session_ctx->ecdh_ctx), ecdh_key, &ecdh_key_length, false);
if (THEMIS_SUCCESS != soter_status)
{
return soter_status;
}
sign_data[0].data = (const uint8_t *)peer_ecdh_key;
sign_data[0].length = peer_ecdh_key_length;
sign_data[1].data = ecdh_key;
sign_data[1].length = ecdh_key_length;
sign_data[2].data = soter_container_const_data(peer_id);
sign_data[2].length = soter_container_data_size(peer_id);
sign_data[3].data = session_ctx->we.id;
sign_data[3].length = session_ctx->we.id_length;
res = verify_signature(peer_sign_key, sign_key_length, sign_data, 4, signature, signature_length);
if (THEMIS_SUCCESS != res)
{
return res;
}
res = secure_session_peer_init(&(session_ctx->peer), soter_container_const_data(peer_id), soter_container_data_size(peer_id), peer_ecdh_key, peer_ecdh_key_length, peer_sign_key, sign_key_length);
if (THEMIS_SUCCESS != res)
{
goto err;
}
sign_data[0].data = ecdh_key;
sign_data[0].length = ecdh_key_length;
sign_data[1].data = (const uint8_t *)peer_ecdh_key;
sign_data[1].length = peer_ecdh_key_length;
sign_data[2].data = session_ctx->we.id;
sign_data[2].length = session_ctx->we.id_length;
sign_data[3].data = soter_container_const_data(peer_id);
sign_data[3].length = soter_container_data_size(peer_id);
res = soter_kdf(NULL, 0, SESSION_ID_GENERATION_LABEL, sign_data, 4, &(session_ctx->session_id), sizeof(session_ctx->session_id));
if (THEMIS_SUCCESS != res)
{
goto err;
}
/* we will reuse sign_key buffer for shared secret computation */
sign_key_length = sizeof(sign_key);
res = soter_asym_ka_derive(&(session_ctx->ecdh_ctx), peer_ecdh_key, peer_ecdh_key_length, sign_key, &sign_key_length);
if (THEMIS_SUCCESS != res)
{
goto err;
}
sign_data[0].data = (const uint8_t *)(&(session_ctx->session_id));
sign_data[0].length = sizeof(session_ctx->session_id);
res = soter_kdf(sign_key, sign_key_length, SESSION_MASTER_KEY_GENERATION_LABEL, sign_data, 1, session_ctx->session_master_key, sizeof(session_ctx->session_master_key));
if (THEMIS_SUCCESS != res)
{
goto err;
}
/* restore sign data for signature computation */
sign_data[0].data = ecdh_key;
sign_data[0].length = ecdh_key_length;
res = compute_signature(session_ctx->we.sign_key, session_ctx->we.sign_key_length, NULL, 0, NULL, &signature_length);
if (THEMIS_BUFFER_TOO_SMALL != res)
{
goto err;
}
/* we will reuse sign_key_length for mac length retrieval */
res = compute_mac(session_ctx->session_master_key, sizeof(session_ctx->session_master_key), NULL, 0, NULL, &sign_key_length);
if (THEMIS_BUFFER_TOO_SMALL != res)
{
goto err;
}
length_to_send = sizeof(soter_container_hdr_t) + signature_length + sign_key_length;
if ((NULL == output) || (*output_length < length_to_send))
{
*output_length = length_to_send;
res = THEMIS_BUFFER_TOO_SMALL;
goto err;
}
container = (soter_container_hdr_t *)data_to_send;
/* Actual signature may be 1 or 2 bytes less than reported above because leading zeroes are stripped */
length_to_send -= signature_length;
res = compute_signature(session_ctx->we.sign_key, session_ctx->we.sign_key_length, sign_data, 4, soter_container_data(container), &signature_length);
if (THEMIS_SUCCESS != res)
{
goto err;
}
length_to_send += signature_length;
mac = soter_container_data(container) + signature_length;
sign_data[0].data = (const uint8_t *)(session_ctx->peer.ecdh_key);
sign_data[0].length = session_ctx->peer.ecdh_key_length;
sign_data[1].data = (const uint8_t *)(&(session_ctx->session_id));
sign_data[1].length = sizeof(session_ctx->session_id);
res = compute_mac(session_ctx->session_master_key, sizeof(session_ctx->session_master_key), sign_data, 2, mac, &sign_key_length);
if (THEMIS_SUCCESS != res)
{
goto err;
}
*output_length = length_to_send;
memcpy(container->tag, THEMIS_SESSION_PROTO_TAG, SOTER_CONTAINER_TAG_LENGTH);
soter_container_set_data_size(container, length_to_send - sizeof(soter_container_hdr_t));
soter_update_container_checksum(container);
/* "Client mode": waiting final confirmation from server */
session_ctx->state_handler = secure_session_finish_client;
err:
if (THEMIS_SUCCESS != res)
{
secure_session_peer_cleanup(&(session_ctx->peer));
}
return res;
}
static themis_status_t secure_session_accept(secure_session_t *session_ctx, const void *data, size_t data_length, void *output, size_t *output_length)
{
const soter_container_hdr_t *proto_message = data;
const soter_container_hdr_t *peer_id;
const soter_container_hdr_t *peer_ecdh_key;
size_t peer_ecdh_key_length;
const uint8_t *signature;
size_t signature_length;
themis_status_t res = THEMIS_SUCCESS;
soter_status_t soter_status;
uint8_t sign_key[1024]; /* Should be enough for RSA 8192 which is 512 bytes */
size_t sign_key_length;
const soter_container_hdr_t *peer_sign_key;
soter_kdf_context_buf_t sign_data[4];
uint8_t *data_to_send = output;
size_t length_to_send;
size_t ecdh_key_length = 0;
soter_container_hdr_t *container;
if (data_length < sizeof(soter_container_hdr_t))
{
return THEMIS_INVALID_PARAMETER;
}
if (memcmp(proto_message->tag, THEMIS_SESSION_PROTO_TAG, SOTER_CONTAINER_TAG_LENGTH))
{
return THEMIS_INVALID_PARAMETER;
}
if (data_length < (soter_container_data_size(proto_message) + sizeof(soter_container_hdr_t)))
{
return THEMIS_INVALID_PARAMETER;
}
if (THEMIS_SUCCESS != soter_verify_container_checksum(proto_message))
{
return THEMIS_INVALID_PARAMETER;
}
peer_id = (const soter_container_hdr_t *)soter_container_const_data(proto_message);
if (memcmp(peer_id->tag, THEMIS_SESSION_ID_TAG, SOTER_CONTAINER_TAG_LENGTH))
{
return THEMIS_INVALID_PARAMETER;
}
if (THEMIS_SUCCESS != soter_verify_container_checksum(peer_id))
{
return THEMIS_INVALID_PARAMETER;
}
peer_ecdh_key = (const soter_container_hdr_t *)(soter_container_const_data(peer_id) + soter_container_data_size(peer_id));
if (memcmp(peer_ecdh_key->tag, EC_PUB_KEY_PREF, strlen(EC_PUB_KEY_PREF)))
{
return THEMIS_INVALID_PARAMETER;
}
peer_ecdh_key_length = soter_container_data_size(peer_ecdh_key) + sizeof(soter_container_hdr_t);
signature = (const uint8_t *)peer_ecdh_key + peer_ecdh_key_length;
signature_length = (const uint8_t *)data + soter_container_data_size(proto_message) + sizeof(soter_container_hdr_t) - signature;
if (session_ctx->user_callbacks->get_public_key_for_id(soter_container_const_data(peer_id), soter_container_data_size(peer_id), sign_key, sizeof(sign_key), session_ctx->user_callbacks->user_data))
{
return THEMIS_SSESSION_GET_PUB_FOR_ID_CALLBACK_ERROR;
}
peer_sign_key = (const soter_container_hdr_t *)sign_key;
if (memcmp(peer_sign_key->tag, EC_PUB_KEY_PREF, strlen(EC_PUB_KEY_PREF)))
{
return THEMIS_INVALID_PARAMETER;
}
sign_key_length = ntohl(peer_sign_key->size);
if (sizeof(soter_container_hdr_t) >= sign_key_length)
{
return THEMIS_INVALID_PARAMETER;
}
sign_data[0].data = (const uint8_t *)peer_ecdh_key;
sign_data[0].length = peer_ecdh_key_length;
res = verify_signature(peer_sign_key, sign_key_length, sign_data, 1, signature, signature_length);
if (THEMIS_SUCCESS != res)
{
return res;
}
/* Preparing to send response */
res = compute_signature(session_ctx->we.sign_key, session_ctx->we.sign_key_length, NULL, 0, NULL, &signature_length);
if (THEMIS_BUFFER_TOO_SMALL != res)
{
return res;
}
soter_status = soter_asym_ka_export_key(&(session_ctx->ecdh_ctx), NULL, &ecdh_key_length, false);
if (THEMIS_BUFFER_TOO_SMALL != soter_status)
{
return soter_status;
}
length_to_send = 2 * sizeof(soter_container_hdr_t) + session_ctx->we.id_length + ecdh_key_length + signature_length;
if ((NULL == output) || (*output_length < length_to_send))
{
*output_length = length_to_send;
return THEMIS_BUFFER_TOO_SMALL;
}
res = secure_session_peer_init(&(session_ctx->peer), soter_container_const_data(peer_id), soter_container_data_size(peer_id), peer_ecdh_key, peer_ecdh_key_length, peer_sign_key, sign_key_length);
if (THEMIS_SUCCESS != res)
{
goto err;
}
/* Storing ID in a container */
container = (soter_container_hdr_t *)data_to_send + 1;
memcpy(container->tag, THEMIS_SESSION_ID_TAG, SOTER_CONTAINER_TAG_LENGTH);
soter_container_set_data_size(container, session_ctx->we.id_length);
memcpy(soter_container_data(container), session_ctx->we.id, session_ctx->we.id_length);
soter_update_container_checksum(container);
/* Moving back to beginning of allocated buffer */
container = (soter_container_hdr_t *)data_to_send;
soter_status = soter_asym_ka_export_key(&(session_ctx->ecdh_ctx), data_to_send + (2 * sizeof(soter_container_hdr_t)) + session_ctx->we.id_length, &ecdh_key_length, false);
if (THEMIS_SUCCESS != soter_status)
{
res = soter_status;
goto err;
}
sign_data[0].data = data_to_send + (2 * sizeof(soter_container_hdr_t)) + session_ctx->we.id_length;
sign_data[0].length = ecdh_key_length;
sign_data[1].data = session_ctx->peer.ecdh_key;
sign_data[1].length = session_ctx->peer.ecdh_key_length;
sign_data[2].data = session_ctx->we.id;
sign_data[2].length = session_ctx->we.id_length;
sign_data[3].data = session_ctx->peer.id;
sign_data[3].length = session_ctx->peer.id_length;
/* Actual signature may be 1 or 2 bytes less than reported above because leading zeroes are stripped */
length_to_send -= signature_length;
res = compute_signature(session_ctx->we.sign_key, session_ctx->we.sign_key_length, sign_data, 4, data_to_send + (2 * sizeof(soter_container_hdr_t)) + session_ctx->we.id_length + ecdh_key_length, &signature_length);
if (THEMIS_SUCCESS != res)
{
goto err;
}
length_to_send += signature_length;
*output_length = length_to_send;
memcpy(container->tag, THEMIS_SESSION_PROTO_TAG, SOTER_CONTAINER_TAG_LENGTH);
soter_container_set_data_size(container, length_to_send - sizeof(soter_container_hdr_t));
soter_update_container_checksum(container);
/* "Server mode": waiting response from the client */
session_ctx->state_handler = secure_session_finish_server;
if (session_ctx->user_callbacks->state_changed)
{
session_ctx->user_callbacks->state_changed(STATE_NEGOTIATING, session_ctx->user_callbacks->user_data);
}
err:
if (THEMIS_SUCCESS != res)
{
secure_session_peer_cleanup(&(session_ctx->peer));
}
return res;
}
static int verify_private_key_ownership(struct openssl_session_auth_context* ctx, const char* private_key, int private_key_length, const char* client_certificate, int client_certificate_length) {
char* x_buffer = NULL, *y_buffer = NULL, *concat_buffer = NULL;
int ret, tmp;
char* yx_signature = NULL, *xy_signature = NULL;
int yx_signature_length, xy_signature_length;
x_buffer = malloc(XY_RANDOM_DATA_LENGTH);
y_buffer = malloc(XY_RANDOM_DATA_LENGTH);
concat_buffer = malloc(2*XY_RANDOM_DATA_LENGTH);
if ( !x_buffer || !y_buffer || !concat_buffer )
goto failed;
get_random_key(x_buffer, XY_RANDOM_DATA_LENGTH);
if ( write_u32(ctx, XY_RANDOM_DATA_LENGTH) != 4 ) {
printf("Failed to x buffer size\n");
goto failed;
}
if ( openssl_local_write(ctx, x_buffer, XY_RANDOM_DATA_LENGTH) != XY_RANDOM_DATA_LENGTH ) {
printf("Failed to send x buffer\n");
goto failed;
}
if ( openssl_local_read(ctx, XY_RANDOM_DATA_LENGTH, y_buffer, &tmp) < XY_RANDOM_DATA_LENGTH ) {
printf( "Failed to read y buffer\n");
goto failed;
}
memcpy(concat_buffer,y_buffer, XY_RANDOM_DATA_LENGTH);
memcpy(concat_buffer+XY_RANDOM_DATA_LENGTH,x_buffer, XY_RANDOM_DATA_LENGTH);
yx_signature_length = read_u32(ctx);
if ( yx_signature_length == READ_ERROR ) {
printf("Failed to read yx signature length\n");
goto failed;
}
yx_signature = malloc(yx_signature_length);
if ( !yx_signature )
goto failed;
if ( openssl_local_read(ctx, yx_signature_length, yx_signature, &tmp) < yx_signature_length ) {
printf("Failed to read yx signature\n");
goto failed;
}
ret = verify_signature(client_certificate, client_certificate_length, concat_buffer, 2*XY_RANDOM_DATA_LENGTH, yx_signature, yx_signature_length);
if ( ret ) {
printf("Failed to verify yx signature\n");
goto failed;
}
memcpy(concat_buffer,x_buffer, XY_RANDOM_DATA_LENGTH);
memcpy(concat_buffer+XY_RANDOM_DATA_LENGTH,y_buffer, XY_RANDOM_DATA_LENGTH);
ret = sign_data(private_key, private_key_length, concat_buffer, 2*XY_RANDOM_DATA_LENGTH, &xy_signature, &xy_signature_length);
if ( ret ) {
printf("Failed to sign xy buffer\n");
goto failed;
}
if ( write_u32(ctx, xy_signature_length) != 4) {
printf("Failed to send xy signature length\n");
goto failed;
}
/* Send server certificate */
if ( openssl_local_write(ctx, xy_signature, xy_signature_length) != xy_signature_length ) {
printf("Failed to send xy signature\n");
goto failed;
}
goto done;
failed:
ret = -1;
done:
free(x_buffer);
free(y_buffer);
free(concat_buffer);
free(xy_signature);
free(yx_signature);
return ret;
};
/**
* Check the trust on one PKCS#7 SignedInfo block.
*/
int pkcs7_validate_trust_one(struct pkcs7_message *pkcs7,
struct pkcs7_signed_info *sinfo,
struct key *trust_keyring)
{
struct public_key_signature *sig = &sinfo->sig;
struct x509_certificate *x509, *last = NULL, *p;
struct key *key;
bool trusted;
int ret;
kenter(",%u,", sinfo->index);
for (x509 = sinfo->signer; x509; x509 = x509->signer) {
if (x509->seen) {
if (x509->verified) {
trusted = x509->trusted;
goto verified;
}
kleave(" = -ENOKEY [cached]");
return -ENOKEY;
}
x509->seen = true;
/* Look to see if this certificate is present in the trusted
* keys.
*/
key = pkcs7_request_asymmetric_key(
trust_keyring,
x509->subject, strlen(x509->subject),
x509->fingerprint, strlen(x509->fingerprint));
if (!IS_ERR(key))
/* One of the X.509 certificates in the PKCS#7 message
* is apparently the same as one we already trust.
* Verify that the trusted variant can also validate
* the signature on the descendant.
*/
goto matched;
if (key == ERR_PTR(-ENOMEM))
return -ENOMEM;
/* Self-signed certificates form roots of their own, and if we
* don't know them, then we can't accept them.
*/
if (x509->next == x509) {
kleave(" = -ENOKEY [unknown self-signed]");
return -ENOKEY;
}
might_sleep();
last = x509;
sig = &last->sig;
}
/* No match - see if the root certificate has a signer amongst the
* trusted keys.
*/
if (!last || !last->issuer || !last->authority) {
kleave(" = -ENOKEY [no backref]");
return -ENOKEY;
}
key = pkcs7_request_asymmetric_key(
trust_keyring,
last->issuer, strlen(last->issuer),
last->authority, strlen(last->authority));
if (IS_ERR(key))
return PTR_ERR(key) == -ENOMEM ? -ENOMEM : -ENOKEY;
x509 = last;
matched:
ret = verify_signature(key, sig);
trusted = test_bit(KEY_FLAG_TRUSTED, &key->flags);
key_put(key);
if (ret < 0) {
if (ret == -ENOMEM)
return ret;
kleave(" = -EKEYREJECTED [verify %d]", ret);
return -EKEYREJECTED;
}
verified:
x509->verified = true;
for (p = sinfo->signer; p != x509; p = p->signer) {
p->verified = true;
p->trusted = trusted;
}
sinfo->trusted = trusted;
kleave(" = 0");
return 0;
}