/**
* gnutls_psk_set_client_credentials - Used to set the username/password, in a gnutls_psk_client_credentials_t structure
* @res: is a #gnutls_psk_client_credentials_t structure.
* @username: is the user's zero-terminated userid
* @key: is the user's key
* @format: indicate the format of the key, either
* %GNUTLS_PSK_KEY_RAW or %GNUTLS_PSK_KEY_HEX.
*
* This function sets the username and password, in a
* gnutls_psk_client_credentials_t structure. Those will be used in
* PSK authentication. @username should be an ASCII string or UTF-8
* strings prepared using the "SASLprep" profile of "stringprep".
* The key can be either in raw byte format or in Hex (not with the
* '0x' prefix).
*
* Returns: %GNUTLS_E_SUCCESS on success, or an error code.
**/
int
gnutls_psk_set_client_credentials (gnutls_psk_client_credentials_t res,
const char *username,
const gnutls_datum_t * key,
gnutls_psk_key_flags flags)
{
int ret;
if (username == NULL || key == NULL || key->data == NULL)
{
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
ret = _gnutls_set_datum (&res->username, username, strlen (username));
if (ret < 0)
return ret;
if (flags == GNUTLS_PSK_KEY_RAW)
{
if (_gnutls_set_datum (&res->key, key->data, key->size) < 0)
{
gnutls_assert ();
ret = GNUTLS_E_MEMORY_ERROR;
goto error;
}
}
else
{ /* HEX key */
size_t size;
size = res->key.size = key->size / 2;
res->key.data = gnutls_malloc (size);
if (res->key.data == NULL)
{
gnutls_assert ();
ret = GNUTLS_E_MEMORY_ERROR;
goto error;
}
ret = gnutls_hex_decode (key, (char *) res->key.data, &size);
res->key.size = (unsigned int) size;
if (ret < 0)
{
gnutls_assert ();
goto error;
}
}
return 0;
error:
_gnutls_free_datum (&res->username);
return ret;
}
/**
* gnutls_dh_get_group:
* @session: is a gnutls session
* @raw_gen: will hold the generator.
* @raw_prime: will hold the prime.
*
* This function will return the group parameters used in the last
* Diffie-Hellman key exchange with the peer. These are the prime and
* the generator used. This function should be used for both
* anonymous and ephemeral Diffie-Hellman. The output parameters must
* be freed with gnutls_free().
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise
* an error code is returned.
**/
int
gnutls_dh_get_group(gnutls_session_t session,
gnutls_datum_t * raw_gen, gnutls_datum_t * raw_prime)
{
dh_info_st *dh;
int ret;
anon_auth_info_t anon_info;
cert_auth_info_t cert_info;
psk_auth_info_t psk_info;
switch (gnutls_auth_get_type(session)) {
case GNUTLS_CRD_ANON:
anon_info = _gnutls_get_auth_info(session, GNUTLS_CRD_ANON);
if (anon_info == NULL)
return GNUTLS_E_INTERNAL_ERROR;
dh = &anon_info->dh;
break;
case GNUTLS_CRD_PSK:
psk_info = _gnutls_get_auth_info(session, GNUTLS_CRD_PSK);
if (psk_info == NULL)
return GNUTLS_E_INTERNAL_ERROR;
dh = &psk_info->dh;
break;
case GNUTLS_CRD_CERTIFICATE:
cert_info = _gnutls_get_auth_info(session, GNUTLS_CRD_CERTIFICATE);
if (cert_info == NULL)
return GNUTLS_E_INTERNAL_ERROR;
dh = &cert_info->dh;
break;
default:
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
ret = _gnutls_set_datum(raw_prime, dh->prime.data, dh->prime.size);
if (ret < 0) {
gnutls_assert();
return ret;
}
ret =
_gnutls_set_datum(raw_gen, dh->generator.data,
dh->generator.size);
if (ret < 0) {
gnutls_assert();
_gnutls_free_datum(raw_prime);
return ret;
}
return 0;
}
/**
* gnutls_pkcs12_bag_set_key_id:
* @bag: The bag
* @indx: The bag's element to add the id
* @id: the ID
*
* This function will add the given key ID, to the specified, by the
* index, bag element. The key ID will be encoded as a 'Local key
* identifier' bag attribute, which is usually used to distinguish
* the local private key and the certificate pair.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
* negative error value. or a negative error code on error.
**/
int
gnutls_pkcs12_bag_set_key_id(gnutls_pkcs12_bag_t bag, unsigned indx,
const gnutls_datum_t * id)
{
int ret;
if (bag == NULL) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
if (indx > bag->bag_elements - 1) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
ret = _gnutls_set_datum(&bag->element[indx].local_key_id,
id->data, id->size);
if (ret < 0) {
gnutls_assert();
return ret;
}
return 0;
}
/**
* gnutls_session_set_data:
* @session: is a #gnutls_session_t type.
* @session_data: is a pointer to space to hold the session.
* @session_data_size: is the session's size
*
* Sets all session parameters, in order to resume a previously
* established session. The session data given must be the one
* returned by gnutls_session_get_data(). This function should be
* called before gnutls_handshake().
*
* Keep in mind that session resuming is advisory. The server may
* choose not to resume the session, thus a full handshake will be
* performed.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise
* an error code is returned.
**/
int
gnutls_session_set_data(gnutls_session_t session,
const void *session_data, size_t session_data_size)
{
int ret;
gnutls_datum_t psession;
psession.data = (uint8_t *) session_data;
psession.size = session_data_size;
if (session_data == NULL || session_data_size == 0) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
ret = _gnutls_session_unpack(session, &psession);
if (ret < 0) {
gnutls_assert();
return ret;
}
session->internals.resumption_requested = 1;
if (session->internals.resumption_data.data != NULL)
gnutls_free(session->internals.resumption_data.data);
_gnutls_set_datum(&session->internals.resumption_data, session_data, session_data_size);
return 0;
}
/**
* gnutls_session_get_data2:
* @session: is a #gnutls_session_t type.
* @data: is a pointer to a datum that will hold the session.
*
* Returns all session parameters needed to be stored to support resumption.
* The client should call this, and store the returned session data. A session
* may be resumed later by calling gnutls_session_set_data().
*
* The returned @data are allocated and must be released using gnutls_free().
*
* This function will fail if called prior to handshake completion. In
* case of false start TLS, the handshake completes only after data have
* been successfully received from the peer.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise
* an error code is returned.
**/
int
gnutls_session_get_data2(gnutls_session_t session, gnutls_datum_t *data)
{
int ret;
if (data == NULL) {
return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
}
if (gnutls_session_is_resumed(session) && session->internals.resumption_data.data) {
ret = _gnutls_set_datum(data, session->internals.resumption_data.data, session->internals.resumption_data.size);
if (ret < 0)
return gnutls_assert_val(ret);
return 0;
}
if (session->internals.resumable == RESUME_FALSE)
return GNUTLS_E_INVALID_SESSION;
ret = _gnutls_session_pack(session, data);
if (ret < 0) {
gnutls_assert();
return ret;
}
return 0;
}
/* Reads the DER signed data from the certificate and allocates space and
* returns them into signed_data.
*/
int
_gnutls_x509_get_signed_data(ASN1_TYPE src, const gnutls_datum *der,
const char *src_name,
gnutls_datum_t * signed_data)
{
int start, end, result;
if (der == NULL || der->size == 0) {
return _gnutls_x509_der_encode(src, src_name, signed_data, 0);
}
/* Get the signed data
*/
result = asn1_der_decoding_startEnd(src, der->data, der->size,
src_name, &start, &end);
if (result != ASN1_SUCCESS) {
result = _gnutls_asn2err(result);
gnutls_assert();
goto cleanup;
}
result =
_gnutls_set_datum(signed_data, &der->data[start],
end - start + 1);
if (result < 0) {
gnutls_assert();
goto cleanup;
}
result = 0;
cleanup:
return result;
}
/**
* gnutls_x509_crl_get_raw_issuer_dn:
* @crl: should contain a gnutls_x509_crl_t structure
* @dn: will hold the starting point of the DN
*
* This function will return a pointer to the DER encoded DN structure
* and the length.
*
* Returns: a negative error code on error, and (0) on success.
*
* Since: 2.12.0
**/
int
gnutls_x509_crl_get_raw_issuer_dn(gnutls_x509_crl_t crl,
gnutls_datum_t * dn)
{
return _gnutls_set_datum(dn, crl->raw_issuer_dn.data,
crl->raw_issuer_dn.size);
}
int _gnutls13_recv_session_ticket(gnutls_session_t session, gnutls_buffer_st *buf)
{
int ret;
uint8_t value;
tls13_ticket_st *ticket = &session->internals.tls13_ticket;
gnutls_datum_t t;
size_t val;
if (unlikely(buf == NULL))
return gnutls_assert_val(GNUTLS_E_INTERNAL_ERROR);
_gnutls_free_datum(&ticket->ticket);
memset(ticket, 0, sizeof(tls13_ticket_st));
_gnutls_handshake_log("HSK[%p]: parsing session ticket message\n", session);
/* ticket_lifetime */
ret = _gnutls_buffer_pop_prefix32(buf, &val, 0);
if (ret < 0)
return gnutls_assert_val(ret);
ticket->lifetime = val;
/* ticket_age_add */
ret = _gnutls_buffer_pop_prefix32(buf, &val, 0);
if (ret < 0)
return gnutls_assert_val(ret);
ticket->age_add = val;
/* ticket_nonce */
ret = _gnutls_buffer_pop_prefix8(buf, &value, 0);
if (ret < 0)
return gnutls_assert_val(ret);
ticket->nonce_size = value;
ret = _gnutls_buffer_pop_data(buf, ticket->nonce, ticket->nonce_size);
if (ret < 0)
return gnutls_assert_val(ret);
/* ticket */
ret = _gnutls_buffer_pop_datum_prefix16(buf, &t);
if (ret < 0)
return gnutls_assert_val(ret);
gnutls_free(ticket->ticket.data);
ret = _gnutls_set_datum(&ticket->ticket, t.data, t.size);
if (ret < 0)
return gnutls_assert_val(ret);
/* Extensions */
ret = _gnutls_extv_parse(session, parse_nst_extension, buf->data, buf->length);
if (ret < 0)
return gnutls_assert_val(ret);
/* Record the ticket arrival time */
gnutls_gettime(&ticket->arrival_time);
return 0;
}
int _gnutls_pk_params_copy(gnutls_pk_params_st * dst,
const gnutls_pk_params_st * src)
{
unsigned int i, j;
dst->params_nr = 0;
if (src == NULL || src->params_nr == 0) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
dst->flags = src->flags;
dst->algo = src->algo;
for (i = 0; i < src->params_nr; i++) {
dst->params[i] = _gnutls_mpi_copy(src->params[i]);
if (dst->params[i] == NULL) {
goto fail;
}
dst->params_nr++;
}
if (_gnutls_set_datum(&dst->raw_priv, src->raw_priv.data, src->raw_priv.size) < 0) {
gnutls_assert();
goto fail;
}
if (_gnutls_set_datum(&dst->raw_pub, src->raw_pub.data, src->raw_pub.size) < 0) {
gnutls_assert();
goto fail;
}
if (src->seed_size) {
dst->seed_size = src->seed_size;
memcpy(dst->seed, src->seed, src->seed_size);
}
return 0;
fail:
for (j = 0; j < i; j++)
_gnutls_mpi_release(&dst->params[j]);
return GNUTLS_E_MEMORY_ERROR;
}
/**
* gnutls_x509_crl_get_raw_issuer_dn:
* @crl: should contain a gnutls_x509_crl_t structure
* @dn: will hold the starting point of the DN
*
* This function will return a pointer to the DER encoded DN structure
* and the length.
*
* Returns: a negative error code on error, and (0) on success.
*
* Since: 2.12.0
**/
int
gnutls_x509_crl_get_raw_issuer_dn(gnutls_x509_crl_t crl,
gnutls_datum_t * dn)
{
if (crl->raw_issuer_dn.size != 0) {
return _gnutls_set_datum(dn, crl->raw_issuer_dn.data,
crl->raw_issuer_dn.size);
} else {
return _gnutls_x509_get_raw_field(crl->crl, "tbsCertList.issuer.rdnSequence", dn);
}
}
static
int name_constraints_add(gnutls_x509_name_constraints_t nc,
gnutls_x509_subject_alt_name_t type,
const gnutls_datum_t * name,
unsigned permitted)
{
struct name_constraints_node_st * tmp, *prev = NULL;
int ret;
if (type != GNUTLS_SAN_DNSNAME && type != GNUTLS_SAN_RFC822NAME &&
type != GNUTLS_SAN_DN && type != GNUTLS_SAN_URI && type != GNUTLS_SAN_IPADDRESS)
return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
if (type == GNUTLS_SAN_IPADDRESS && (name->size != 8 && name->size != 32)) {
return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
}
if (permitted != 0)
prev = tmp = nc->permitted;
else
prev = tmp = nc->excluded;
while(tmp != NULL) {
tmp = tmp->next;
if (tmp != NULL)
prev = tmp;
}
tmp = gnutls_malloc(sizeof(struct name_constraints_node_st));
if (tmp == NULL)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
tmp->next = NULL;
tmp->type = type;
ret = _gnutls_set_datum(&tmp->name, name->data, name->size);
if (ret < 0) {
gnutls_assert();
gnutls_free(tmp);
return ret;
}
if (prev == NULL) {
if (permitted != 0)
nc->permitted = tmp;
else
nc->excluded = tmp;
} else
prev->next = tmp;
return 0;
}
/**
* gnutls_pkcs12_bag_set_data - This function inserts data into the bag
* @bag: The bag
* @type: The data's type
* @data: the data to be copied.
*
* This function will insert the given data of the given type into the
* bag.
*
* Returns the index of the added bag on success, or a negative
* value on error.
*
**/
int
gnutls_pkcs12_bag_set_data (gnutls_pkcs12_bag_t bag,
gnutls_pkcs12_bag_type_t type,
const gnutls_datum_t * data)
{
int ret;
if (bag == NULL)
{
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
if (bag->bag_elements == MAX_BAG_ELEMENTS - 1)
{
gnutls_assert ();
/* bag is full */
return GNUTLS_E_MEMORY_ERROR;
}
if (bag->bag_elements == 1)
{
/* A bag with a key or an encrypted bag, must have
* only one element.
*/
if (bag->element[0].type == GNUTLS_BAG_PKCS8_KEY ||
bag->element[0].type == GNUTLS_BAG_PKCS8_ENCRYPTED_KEY ||
bag->element[0].type == GNUTLS_BAG_ENCRYPTED)
{
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
}
ret =
_gnutls_set_datum (&bag->element[bag->bag_elements].data,
data->data, data->size);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
bag->element[bag->bag_elements].type = type;
bag->bag_elements++;
return bag->bag_elements - 1;
}
/* Reads the DER signed data from the certificate and allocates space and
* returns them into signed_data.
*/
int
_gnutls_x509_get_signed_data(ASN1_TYPE src, const gnutls_datum *_der,
const char *src_name,
gnutls_datum_t * signed_data)
{
int start, end, result;
gnutls_datum_t der;
unsigned need_free = 0;
if (_der == NULL || _der->size == 0) {
result = _gnutls_x509_der_encode(src, "", &der, 0);
if (result < 0) {
gnutls_assert();
return result;
}
need_free = 1;
} else {
der.data = _der->data;
der.size = _der->size;
}
/* Get the signed data
*/
result = asn1_der_decoding_startEnd(src, der.data, der.size,
src_name, &start, &end);
if (result != ASN1_SUCCESS) {
result = _gnutls_asn2err(result);
gnutls_assert();
goto cleanup;
}
result =
_gnutls_set_datum(signed_data, &der.data[start],
end - start + 1);
if (result < 0) {
gnutls_assert();
goto cleanup;
}
result = 0;
cleanup:
if (need_free != 0)
_gnutls_free_datum(&der);
return result;
}
/**
* gnutls_srp_set_server_fake_salt_seed:
* @cred: is a #gnutls_srp_server_credentials_t type
* @seed: is the seed data, only needs to be valid until the function
* returns; size of the seed must be greater than zero
* @salt_length: is the length of the generated fake salts
*
* This function sets the seed that is used to generate salts for
* invalid (non-existent) usernames.
*
* In order to prevent attackers from guessing valid usernames,
* when a user does not exist gnutls generates a salt and a verifier
* and proceeds with the protocol as usual.
* The authentication will ultimately fail, but the client cannot tell
* whether the username is valid (exists) or invalid.
*
* If an attacker learns the seed, given a salt (which is part of the
* handshake) which was generated when the seed was in use, it can tell
* whether or not the authentication failed because of an unknown username.
* This seed cannot be used to reveal application data or passwords.
*
* @salt_length should represent the salt length your application uses.
* Generating fake salts longer than 20 bytes is not supported.
*
* By default the seed is a random value, different each time a
* #gnutls_srp_server_credentials_t is allocated and fake salts are
* 16 bytes long.
*
* Since: 3.3.0
**/
void
gnutls_srp_set_server_fake_salt_seed(gnutls_srp_server_credentials_t cred,
const gnutls_datum_t * seed,
unsigned int salt_length)
{
_gnutls_free_datum(&cred->fake_salt_seed);
_gnutls_set_datum(&cred->fake_salt_seed, seed->data, seed->size);
/* Cap the salt length at the output size of the MAC algorithm
* we are using to generate the fake salts.
*/
const mac_entry_st * me = mac_to_entry(SRP_FAKE_SALT_MAC);
const size_t mac_len = me->output_size;
cred->fake_salt_length = (salt_length < mac_len ? salt_length : mac_len);
}
/**
* gnutls_dh_get_pubkey:
* @session: is a gnutls session
* @raw_key: will hold the public key.
*
* This function will return the peer's public key used in the last
* Diffie-Hellman key exchange. This function should be used for both
* anonymous and ephemeral Diffie-Hellman. The output parameters must
* be freed with gnutls_free().
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise
* an error code is returned.
**/
int
gnutls_dh_get_pubkey(gnutls_session_t session, gnutls_datum_t * raw_key)
{
dh_info_st *dh;
anon_auth_info_t anon_info;
cert_auth_info_t cert_info;
cert_auth_info_t psk_info;
switch (gnutls_auth_get_type(session)) {
case GNUTLS_CRD_ANON:
{
anon_info = _gnutls_get_auth_info(session, GNUTLS_CRD_ANON);
if (anon_info == NULL)
return GNUTLS_E_INTERNAL_ERROR;
dh = &anon_info->dh;
break;
}
case GNUTLS_CRD_PSK:
{
psk_info = _gnutls_get_auth_info(session, GNUTLS_CRD_PSK);
if (psk_info == NULL)
return GNUTLS_E_INTERNAL_ERROR;
dh = &psk_info->dh;
break;
}
case GNUTLS_CRD_CERTIFICATE:
{
cert_info = _gnutls_get_auth_info(session, GNUTLS_CRD_CERTIFICATE);
if (cert_info == NULL)
return GNUTLS_E_INTERNAL_ERROR;
dh = &cert_info->dh;
break;
}
default:
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
return _gnutls_set_datum(raw_key, dh->public_key.data,
dh->public_key.size);
}
/* Reads the DER signed data from the certificate and allocates space and
* returns them into signed_data.
*/
int
_gnutls_x509_get_signed_data (ASN1_TYPE src, const char *src_name,
gnutls_datum_t * signed_data)
{
gnutls_datum_t der;
int start, end, result;
result = _gnutls_x509_der_encode (src, "", &der, 0);
if (result < 0)
{
gnutls_assert ();
return result;
}
/* Get the signed data
*/
result = asn1_der_decoding_startEnd (src, der.data, der.size,
src_name, &start, &end);
if (result != ASN1_SUCCESS)
{
result = _gnutls_asn2err (result);
gnutls_assert ();
goto cleanup;
}
result = _gnutls_set_datum (signed_data, &der.data[start], end - start + 1);
if (result < 0)
{
gnutls_assert ();
goto cleanup;
}
result = 0;
cleanup:
_gnutls_free_datum (&der);
return result;
}
/*-
* _gnutls_x509_crl_get_raw_issuer_dn - This function returns the issuer's DN DER encoded
* @crl: should contain a gnutls_x509_crl_t structure
* @dn: will hold the starting point of the DN
*
* This function will return a pointer to the DER encoded DN structure and
* the length.
*
* Returns a negative value on error, and zero on success.
*
-*/
int
_gnutls_x509_crl_get_raw_issuer_dn (gnutls_x509_crl_t crl,
gnutls_datum_t * dn)
{
ASN1_TYPE c2 = ASN1_TYPE_EMPTY;
int result, len1;
int start1, end1;
gnutls_datum_t crl_signed_data;
if (crl == NULL)
{
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
/* get the issuer of 'crl'
*/
if ((result =
asn1_create_element (_gnutls_get_pkix (), "PKIX1.TBSCertList",
&c2)) != ASN1_SUCCESS)
{
gnutls_assert ();
return _gnutls_asn2err (result);
}
result =
_gnutls_x509_get_signed_data (crl->crl, "tbsCertList", &crl_signed_data);
if (result < 0)
{
gnutls_assert ();
goto cleanup;
}
result =
asn1_der_decoding (&c2, crl_signed_data.data, crl_signed_data.size, NULL);
if (result != ASN1_SUCCESS)
{
/* couldn't decode DER */
gnutls_assert ();
asn1_delete_structure (&c2);
result = _gnutls_asn2err (result);
goto cleanup;
}
result =
asn1_der_decoding_startEnd (c2, crl_signed_data.data,
crl_signed_data.size, "issuer",
&start1, &end1);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = _gnutls_asn2err (result);
goto cleanup;
}
len1 = end1 - start1 + 1;
_gnutls_set_datum (dn, &crl_signed_data.data[start1], len1);
result = 0;
cleanup:
asn1_delete_structure (&c2);
_gnutls_free_datum (&crl_signed_data);
return result;
}
static int
parse_cert_list(gnutls_session_t session, uint8_t * data, size_t data_size)
{
int len, ret;
uint8_t *p = data;
cert_auth_info_t info;
gnutls_certificate_credentials_t cred;
ssize_t dsize = data_size, size;
int i;
unsigned npeer_certs, npeer_ocsp, j;
crt_cert_ctx_st ctx;
gnutls_datum_t *peer_certs = NULL;
gnutls_datum_t *peer_ocsp = NULL;
unsigned nentries = 0;
cred = (gnutls_certificate_credentials_t)
_gnutls_get_cred(session, GNUTLS_CRD_CERTIFICATE);
if (cred == NULL) {
gnutls_assert();
return GNUTLS_E_INSUFFICIENT_CREDENTIALS;
}
if ((ret =
_gnutls_auth_info_init(session, GNUTLS_CRD_CERTIFICATE,
sizeof(cert_auth_info_st), 1)) < 0) {
gnutls_assert();
return ret;
}
if (data == NULL || data_size == 0) {
/* no certificate was sent */
return gnutls_assert_val(GNUTLS_E_UNEXPECTED_PACKET_LENGTH);
}
info = _gnutls_get_auth_info(session, GNUTLS_CRD_CERTIFICATE);
if (info == NULL)
return gnutls_assert_val(GNUTLS_E_INSUFFICIENT_CREDENTIALS);
DECR_LEN(dsize, 3);
size = _gnutls_read_uint24(p);
p += 3;
if (size != dsize)
return gnutls_assert_val(GNUTLS_E_UNEXPECTED_PACKET_LENGTH);
if (size == 0)
return gnutls_assert_val(GNUTLS_E_NO_CERTIFICATE_FOUND);
i = dsize;
while (i > 0) {
DECR_LEN(dsize, 3);
len = _gnutls_read_uint24(p);
if (len == 0)
return gnutls_assert_val(GNUTLS_E_UNEXPECTED_PACKET_LENGTH);
DECR_LEN(dsize, len);
p += len + 3;
i -= len + 3;
DECR_LEN(dsize, 2);
len = _gnutls_read_uint16(p);
DECR_LEN(dsize, len);
i -= len + 2;
p += len + 2;
nentries++;
}
if (dsize != 0)
return gnutls_assert_val(GNUTLS_E_UNEXPECTED_PACKET_LENGTH);
/* this is unnecessary - keeping to avoid a regression due to a re-org
* of the loop above */
if (nentries == 0)
return gnutls_assert_val(GNUTLS_E_UNEXPECTED_PACKET_LENGTH);
npeer_ocsp = 0;
npeer_certs = 0;
/* Ok we now allocate the memory to hold the
* certificate list
*/
peer_certs = gnutls_calloc(nentries, sizeof(gnutls_datum_t));
if (peer_certs == NULL)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
peer_ocsp = gnutls_calloc(nentries, sizeof(gnutls_datum_t));
if (peer_ocsp == NULL) {
ret = gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
goto cleanup;
}
p = data+3;
/* Now we start parsing the list (again).
* We don't use DECR_LEN since the list has
* been parsed before.
*/
ctx.session = session;
for (j = 0; j < nentries; j++) {
len = _gnutls_read_uint24(p);
p += 3;
ret = _gnutls_set_datum(&peer_certs[j], p, len);
if (ret < 0) {
gnutls_assert();
ret = GNUTLS_E_CERTIFICATE_ERROR;
goto cleanup;
}
npeer_certs++;
p += len;
len = _gnutls_read_uint16(p);
ctx.ocsp = &peer_ocsp[j];
ctx.idx = j;
ret = _gnutls_extv_parse(&ctx, parse_cert_extension, p, len+2);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
p += len+2;
npeer_ocsp++;
}
/* The OCSP entries match the certificate entries, although
* the contents of each OCSP entry may be NULL.
*/
for(j=0;j<info->ncerts;j++)
gnutls_free(info->raw_certificate_list[j].data);
gnutls_free(info->raw_certificate_list);
for(j=0;j<info->nocsp;j++)
gnutls_free(info->raw_ocsp_list[j].data);
gnutls_free(info->raw_ocsp_list);
info->raw_certificate_list = peer_certs;
info->ncerts = npeer_certs;
info->raw_ocsp_list = peer_ocsp;
info->nocsp = npeer_ocsp;
return 0;
cleanup:
for(j=0;j<npeer_certs;j++)
gnutls_free(peer_certs[j].data);
for(j=0;j<npeer_ocsp;j++)
gnutls_free(peer_ocsp[j].data);
gnutls_free(peer_certs);
gnutls_free(peer_ocsp);
return ret;
}
/**
* cdk_pk_verify:
* @pk: the public key
* @sig: signature
* @md: the message digest
*
* Verify the signature in @sig and compare it with the message digest in @md.
**/
cdk_error_t
cdk_pk_verify(cdk_pubkey_t pk, cdk_pkt_signature_t sig, const byte * md)
{
gnutls_datum_t s_sig = { NULL, 0 }, di = {
NULL, 0};
byte *encmd = NULL;
cdk_error_t rc;
int ret, algo;
unsigned int i;
gnutls_pk_params_st params;
const mac_entry_st *me;
if (!pk || !sig || !md) {
gnutls_assert();
return CDK_Inv_Value;
}
if (is_DSA(pk->pubkey_algo))
algo = GNUTLS_PK_DSA;
else if (is_RSA(pk->pubkey_algo))
algo = GNUTLS_PK_RSA;
else {
gnutls_assert();
return CDK_Inv_Value;
}
rc = sig_to_datum(&s_sig, sig);
if (rc) {
gnutls_assert();
goto leave;
}
me = mac_to_entry(sig->digest_algo);
rc = _gnutls_set_datum(&di, md, _gnutls_hash_get_algo_len(me));
if (rc < 0) {
rc = gnutls_assert_val(CDK_Out_Of_Core);
goto leave;
}
rc = pk_prepare_hash(algo, me, &di);
if (rc < 0) {
rc = gnutls_assert_val(CDK_General_Error);
goto leave;
}
params.params_nr = cdk_pk_get_npkey(pk->pubkey_algo);
for (i = 0; i < params.params_nr; i++)
params.params[i] = pk->mpi[i];
params.flags = 0;
ret = _gnutls_pk_verify(algo, &di, &s_sig, ¶ms);
if (ret < 0) {
gnutls_assert();
rc = map_gnutls_error(ret);
goto leave;
}
rc = 0;
leave:
_gnutls_free_datum(&s_sig);
_gnutls_free_datum(&di);
cdk_free(encmd);
return rc;
}
/* This will create a PKCS1 or DSA signature, as defined in the TLS protocol.
* Cert is the certificate of the corresponding private key. It is only checked if
* it supports signing.
*/
static int
sign_tls_hash(gnutls_session_t session, const mac_entry_st * hash_algo,
gnutls_pcert_st * cert, gnutls_privkey_t pkey,
const gnutls_datum_t * hash_concat,
gnutls_datum_t * signature)
{
const version_entry_st *ver = get_version(session);
unsigned int key_usage = 0;
/* If our certificate supports signing
*/
if (cert != NULL) {
gnutls_pubkey_get_key_usage(cert->pubkey, &key_usage);
if (key_usage != 0)
if (!(key_usage & GNUTLS_KEY_DIGITAL_SIGNATURE)) {
gnutls_assert();
_gnutls_audit_log(session,
"Peer's certificate does not allow digital signatures. Key usage violation detected (ignored).\n");
}
/* External signing. Deprecated. To be removed. */
if (!pkey) {
int ret;
if (!session->internals.sign_func)
return
gnutls_assert_val
(GNUTLS_E_INSUFFICIENT_CREDENTIALS);
if (!_gnutls_version_has_selectable_sighash(ver))
return (*session->internals.sign_func)
(session,
session->internals.sign_func_userdata,
cert->type, &cert->cert, hash_concat,
signature);
else {
gnutls_datum_t digest;
ret =
_gnutls_set_datum(&digest,
hash_concat->data,
hash_concat->size);
if (ret < 0)
return gnutls_assert_val(ret);
ret =
pk_prepare_hash
(gnutls_pubkey_get_pk_algorithm
(cert->pubkey, NULL), hash_algo,
&digest);
if (ret < 0) {
gnutls_assert();
goto es_cleanup;
}
ret = (*session->internals.sign_func)
(session,
session->internals.sign_func_userdata,
cert->type, &cert->cert, &digest,
signature);
es_cleanup:
gnutls_free(digest.data);
return ret;
}
}
}
if (!_gnutls_version_has_selectable_sighash(ver))
return gnutls_privkey_sign_raw_data(pkey, 0, hash_concat,
signature);
else
return gnutls_privkey_sign_hash(pkey,
(gnutls_digest_algorithm_t)hash_algo->id,
0, hash_concat, signature);
}
static int
unpack_psk_auth_info (gnutls_session_t session,
const gnutls_datum_t * packed_session)
{
size_t username_size;
size_t pack_size;
int pos = 0, size, ret;
psk_auth_info_t info;
if (packed_session->data[0] != GNUTLS_CRD_PSK)
{
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
pack_size = _gnutls_read_uint32 (&packed_session->data[PACK_HEADER_SIZE]);
pos += PACK_HEADER_SIZE + 4;
if (pack_size == 0)
return 0; /* nothing to be done */
/* a simple check for integrity */
if (pack_size + PACK_HEADER_SIZE + 4 > packed_session->size)
{
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
/* client and serer have the same auth_info here
*/
ret =
_gnutls_auth_info_set (session, GNUTLS_CRD_PSK,
sizeof (psk_auth_info_st), 1);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
info = _gnutls_get_auth_info (session);
if (info == NULL)
{
gnutls_assert ();
return GNUTLS_E_INTERNAL_ERROR;
}
username_size = _gnutls_read_uint32 (&packed_session->data[pos]);
pos += 4;
memcpy (info->username, &packed_session->data[pos], username_size);
pos += username_size;
info->dh.secret_bits = _gnutls_read_uint16 (&packed_session->data[pos]);
pos += 2;
size = _gnutls_read_uint32 (&packed_session->data[pos]);
pos += 4;
ret = _gnutls_set_datum (&info->dh.prime, &packed_session->data[pos], size);
if (ret < 0)
{
gnutls_assert ();
goto error;
}
pos += size;
size = _gnutls_read_uint32 (&packed_session->data[pos]);
pos += 4;
ret =
_gnutls_set_datum (&info->dh.generator, &packed_session->data[pos], size);
if (ret < 0)
{
gnutls_assert ();
goto error;
}
pos += size;
size = _gnutls_read_uint32 (&packed_session->data[pos]);
pos += 4;
ret =
_gnutls_set_datum (&info->dh.public_key, &packed_session->data[pos],
size);
if (ret < 0)
{
gnutls_assert ();
goto error;
}
pos += size;
return 0;
error:
_gnutls_free_datum (&info->dh.prime);
_gnutls_free_datum (&info->dh.generator);
_gnutls_free_datum (&info->dh.public_key);
return ret;
}
static int
client_send_params(gnutls_session_t session,
gnutls_buffer_t extdata,
const gnutls_psk_client_credentials_t cred)
{
int ret, ext_offset = 0;
uint8_t binder_value[MAX_HASH_SIZE];
size_t spos;
gnutls_datum_t username = {NULL, 0};
gnutls_datum_t user_key = {NULL, 0}, rkey = {NULL, 0};
gnutls_datum_t client_hello;
unsigned next_idx;
const mac_entry_st *prf_res = NULL;
const mac_entry_st *prf_psk = NULL;
struct timespec cur_time;
uint32_t ticket_age, ob_ticket_age;
int free_username = 0;
psk_auth_info_t info = NULL;
unsigned psk_id_len = 0;
unsigned binders_len, binders_pos;
if (((session->internals.flags & GNUTLS_NO_TICKETS) ||
session->internals.tls13_ticket.ticket.data == NULL) &&
(!cred || !_gnutls_have_psk_credentials(cred, session))) {
return 0;
}
binders_len = 0;
/* placeholder to be filled later */
spos = extdata->length;
ret = _gnutls_buffer_append_prefix(extdata, 16, 0);
if (ret < 0)
return gnutls_assert_val(ret);
/* First, let's see if we have a session ticket to send */
if (!(session->internals.flags & GNUTLS_NO_TICKETS) &&
session->internals.tls13_ticket.ticket.data != NULL) {
/* We found a session ticket */
if (unlikely(session->internals.tls13_ticket.prf == NULL)) {
_gnutls13_session_ticket_unset(session);
ret = gnutls_assert_val(GNUTLS_E_INTERNAL_ERROR);
goto cleanup;
}
prf_res = session->internals.tls13_ticket.prf;
gnutls_gettime(&cur_time);
if (unlikely(_gnutls_timespec_cmp(&cur_time,
&session->internals.
tls13_ticket.
arrival_time) < 0)) {
gnutls_assert();
_gnutls13_session_ticket_unset(session);
goto ignore_ticket;
}
/* Check whether the ticket is stale */
ticket_age = timespec_sub_ms(&cur_time,
&session->internals.tls13_ticket.
arrival_time);
if (ticket_age / 1000 > session->internals.tls13_ticket.lifetime) {
_gnutls13_session_ticket_unset(session);
goto ignore_ticket;
}
ret = compute_psk_from_ticket(&session->internals.tls13_ticket, &rkey);
if (ret < 0) {
_gnutls13_session_ticket_unset(session);
goto ignore_ticket;
}
/* Calculate obfuscated ticket age, in milliseconds, mod 2^32 */
ob_ticket_age = ticket_age + session->internals.tls13_ticket.age_add;
if ((ret = _gnutls_buffer_append_data_prefix(extdata, 16,
session->internals.tls13_ticket.ticket.data,
session->internals.tls13_ticket.ticket.size)) < 0) {
gnutls_assert();
goto cleanup;
}
/* Now append the obfuscated ticket age */
if ((ret = _gnutls_buffer_append_prefix(extdata, 32, ob_ticket_age)) < 0) {
gnutls_assert();
goto cleanup;
}
psk_id_len += 6 + session->internals.tls13_ticket.ticket.size;
binders_len += 1 + _gnutls_mac_get_algo_len(prf_res);
}
ignore_ticket:
if (cred && _gnutls_have_psk_credentials(cred, session)) {
gnutls_datum_t tkey;
if (cred->binder_algo == NULL) {
gnutls_assert();
ret = gnutls_assert_val(GNUTLS_E_INSUFFICIENT_CREDENTIALS);
goto cleanup;
}
prf_psk = cred->binder_algo;
ret = _gnutls_find_psk_key(session, cred, &username, &tkey, &free_username);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
if (username.size == 0 || username.size > UINT16_MAX) {
ret = gnutls_assert_val(GNUTLS_E_INVALID_PASSWORD);
goto cleanup;
}
if (!free_username) {
/* we need to copy the key */
ret = _gnutls_set_datum(&user_key, tkey.data, tkey.size);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
} else {
user_key.data = tkey.data;
user_key.size = tkey.size;
}
ret = _gnutls_auth_info_init(session, GNUTLS_CRD_PSK, sizeof(psk_auth_info_st), 1);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
info = _gnutls_get_auth_info(session, GNUTLS_CRD_PSK);
assert(info != NULL);
memcpy(info->username, username.data, username.size);
info->username[username.size] = 0;
if ((ret = _gnutls_buffer_append_data_prefix(extdata, 16,
username.data,
username.size)) < 0) {
gnutls_assert();
goto cleanup;
}
/* Now append the obfuscated ticket age */
if ((ret = _gnutls_buffer_append_prefix(extdata, 32, 0)) < 0) {
gnutls_assert();
goto cleanup;
}
psk_id_len += 6 + username.size;
binders_len += 1 + _gnutls_mac_get_algo_len(prf_psk);
}
/* if no tickets or identities to be sent */
if (psk_id_len == 0) {
/* reset extensions buffer */
extdata->length = spos;
return 0;
}
_gnutls_write_uint16(psk_id_len, &extdata->data[spos]);
binders_pos = extdata->length-spos;
ext_offset = _gnutls_ext_get_extensions_offset(session);
/* Compute the binders. extdata->data points to the start
* of this client hello. */
assert(extdata->length >= sizeof(mbuffer_st));
assert(ext_offset >= (ssize_t)sizeof(mbuffer_st));
ext_offset -= sizeof(mbuffer_st);
client_hello.data = extdata->data+sizeof(mbuffer_st);
client_hello.size = extdata->length-sizeof(mbuffer_st);
next_idx = 0;
ret = _gnutls_buffer_append_prefix(extdata, 16, binders_len);
if (ret < 0) {
gnutls_assert_val(ret);
goto cleanup;
}
if (prf_res && rkey.size > 0) {
ret = compute_psk_binder(session, prf_res,
binders_len, binders_pos,
ext_offset, &rkey, &client_hello, 1,
binder_value);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
/* Associate the selected pre-shared key with the session */
gnutls_free(session->key.binders[next_idx].psk.data);
session->key.binders[next_idx].psk.data = rkey.data;
session->key.binders[next_idx].psk.size = rkey.size;
rkey.data = NULL;
session->key.binders[next_idx].prf = prf_res;
session->key.binders[next_idx].resumption = 1;
session->key.binders[next_idx].idx = next_idx;
_gnutls_handshake_log("EXT[%p]: sent PSK resumption identity (%d)\n", session, next_idx);
next_idx++;
/* Add the binder */
ret = _gnutls_buffer_append_data_prefix(extdata, 8, binder_value, prf_res->output_size);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
session->internals.hsk_flags |= HSK_TLS13_TICKET_SENT;
}
if (prf_psk && user_key.size > 0 && info) {
ret = compute_psk_binder(session, prf_psk,
binders_len, binders_pos,
ext_offset, &user_key, &client_hello, 0,
binder_value);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
/* Associate the selected pre-shared key with the session */
gnutls_free(session->key.binders[next_idx].psk.data);
session->key.binders[next_idx].psk.data = user_key.data;
session->key.binders[next_idx].psk.size = user_key.size;
user_key.data = NULL;
session->key.binders[next_idx].prf = prf_psk;
session->key.binders[next_idx].resumption = 0;
session->key.binders[next_idx].idx = next_idx;
_gnutls_handshake_log("EXT[%p]: sent PSK identity '%s' (%d)\n", session, info->username, next_idx);
next_idx++;
/* Add the binder */
ret = _gnutls_buffer_append_data_prefix(extdata, 8, binder_value, prf_psk->output_size);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
}
ret = 0;
cleanup:
if (free_username)
_gnutls_free_datum(&username);
_gnutls_free_temp_key_datum(&user_key);
_gnutls_free_temp_key_datum(&rkey);
return ret;
}
/* This function is to be called after handshake, when master_secret,
* client_random and server_random have been initialized.
* This function creates the keys and stores them into pending session.
* (session->cipher_specs)
*/
static int
_gnutls_set_keys (gnutls_session_t session, record_parameters_st * params,
int hash_size, int IV_size, int key_size, int export_flag)
{
/* FIXME: This function is too long
*/
uint8_t rnd[2 * GNUTLS_RANDOM_SIZE];
uint8_t rrnd[2 * GNUTLS_RANDOM_SIZE];
int pos, ret;
int block_size;
char buf[65];
/* avoid using malloc */
uint8_t key_block[2 * MAX_HASH_SIZE + 2 * MAX_CIPHER_KEY_SIZE +
2 * MAX_CIPHER_BLOCK_SIZE];
record_state_st *client_write, *server_write;
if (session->security_parameters.entity == GNUTLS_CLIENT)
{
client_write = ¶ms->write;
server_write = ¶ms->read;
}
else
{
client_write = ¶ms->read;
server_write = ¶ms->write;
}
block_size = 2 * hash_size + 2 * key_size;
if (export_flag == 0)
block_size += 2 * IV_size;
memcpy (rnd, session->security_parameters.server_random,
GNUTLS_RANDOM_SIZE);
memcpy (&rnd[GNUTLS_RANDOM_SIZE],
session->security_parameters.client_random, GNUTLS_RANDOM_SIZE);
memcpy (rrnd, session->security_parameters.client_random,
GNUTLS_RANDOM_SIZE);
memcpy (&rrnd[GNUTLS_RANDOM_SIZE],
session->security_parameters.server_random, GNUTLS_RANDOM_SIZE);
if (session->security_parameters.version == GNUTLS_SSL3)
{ /* SSL 3 */
ret =
_gnutls_ssl3_generate_random
(session->security_parameters.master_secret, GNUTLS_MASTER_SIZE, rnd,
2 * GNUTLS_RANDOM_SIZE, block_size, key_block);
}
else
{ /* TLS 1.0 */
ret =
_gnutls_PRF (session, session->security_parameters.master_secret,
GNUTLS_MASTER_SIZE, keyexp, keyexp_length,
rnd, 2 * GNUTLS_RANDOM_SIZE, block_size, key_block);
}
if (ret < 0)
return gnutls_assert_val (ret);
_gnutls_hard_log ("INT: KEY BLOCK[%d]: %s\n", block_size,
_gnutls_bin2hex (key_block, block_size, buf,
sizeof (buf), NULL));
pos = 0;
if (hash_size > 0)
{
if (_gnutls_set_datum
(&client_write->mac_secret, &key_block[pos], hash_size) < 0)
return gnutls_assert_val (GNUTLS_E_MEMORY_ERROR);
pos += hash_size;
if (_gnutls_set_datum
(&server_write->mac_secret, &key_block[pos], hash_size) < 0)
return gnutls_assert_val (GNUTLS_E_MEMORY_ERROR);
pos += hash_size;
}
if (key_size > 0)
{
uint8_t key1[EXPORT_FINAL_KEY_SIZE];
uint8_t key2[EXPORT_FINAL_KEY_SIZE];
uint8_t *client_write_key, *server_write_key;
int client_write_key_size, server_write_key_size;
if (export_flag == 0)
{
client_write_key = &key_block[pos];
client_write_key_size = key_size;
pos += key_size;
server_write_key = &key_block[pos];
server_write_key_size = key_size;
pos += key_size;
}
else
{ /* export */
client_write_key = key1;
server_write_key = key2;
/* generate the final keys */
if (session->security_parameters.version == GNUTLS_SSL3)
{ /* SSL 3 */
ret =
_gnutls_ssl3_hash_md5 (&key_block[pos],
key_size, rrnd,
2 * GNUTLS_RANDOM_SIZE,
EXPORT_FINAL_KEY_SIZE,
client_write_key);
}
else
{ /* TLS 1.0 */
ret =
_gnutls_PRF (session, &key_block[pos], key_size,
cliwrite, cliwrite_length,
rrnd,
2 * GNUTLS_RANDOM_SIZE,
EXPORT_FINAL_KEY_SIZE, client_write_key);
}
if (ret < 0)
return gnutls_assert_val (ret);
client_write_key_size = EXPORT_FINAL_KEY_SIZE;
pos += key_size;
if (session->security_parameters.version == GNUTLS_SSL3)
{ /* SSL 3 */
ret =
_gnutls_ssl3_hash_md5 (&key_block[pos], key_size,
rnd, 2 * GNUTLS_RANDOM_SIZE,
EXPORT_FINAL_KEY_SIZE,
server_write_key);
}
else
{ /* TLS 1.0 */
ret =
_gnutls_PRF (session, &key_block[pos], key_size,
servwrite, servwrite_length,
rrnd, 2 * GNUTLS_RANDOM_SIZE,
EXPORT_FINAL_KEY_SIZE, server_write_key);
}
if (ret < 0)
return gnutls_assert_val (ret);
server_write_key_size = EXPORT_FINAL_KEY_SIZE;
pos += key_size;
}
if (_gnutls_set_datum
(&client_write->key, client_write_key, client_write_key_size) < 0)
return gnutls_assert_val (GNUTLS_E_MEMORY_ERROR);
_gnutls_hard_log ("INT: CLIENT WRITE KEY [%d]: %s\n",
client_write_key_size,
_gnutls_bin2hex (client_write_key,
client_write_key_size, buf,
sizeof (buf), NULL));
if (_gnutls_set_datum
(&server_write->key, server_write_key, server_write_key_size) < 0)
return gnutls_assert_val (GNUTLS_E_MEMORY_ERROR);
_gnutls_hard_log ("INT: SERVER WRITE KEY [%d]: %s\n",
server_write_key_size,
_gnutls_bin2hex (server_write_key,
server_write_key_size, buf,
sizeof (buf), NULL));
}
/* IV generation in export and non export ciphers.
*/
if (IV_size > 0 && export_flag == 0)
{
if (_gnutls_set_datum
(&client_write->IV, &key_block[pos], IV_size) < 0)
return gnutls_assert_val (GNUTLS_E_MEMORY_ERROR);
pos += IV_size;
if (_gnutls_set_datum
(&server_write->IV, &key_block[pos], IV_size) < 0)
return gnutls_assert_val (GNUTLS_E_MEMORY_ERROR);
}
else if (IV_size > 0 && export_flag != 0)
{
uint8_t iv_block[MAX_CIPHER_BLOCK_SIZE * 2];
if (session->security_parameters.version == GNUTLS_SSL3)
{ /* SSL 3 */
ret = _gnutls_ssl3_hash_md5 ("", 0,
rrnd, GNUTLS_RANDOM_SIZE * 2,
IV_size, iv_block);
if (ret < 0)
return gnutls_assert_val (ret);
ret = _gnutls_ssl3_hash_md5 ("", 0, rnd,
GNUTLS_RANDOM_SIZE * 2,
IV_size, &iv_block[IV_size]);
}
else
{ /* TLS 1.0 */
ret = _gnutls_PRF (session, (uint8_t*)"", 0,
ivblock, ivblock_length, rrnd,
2 * GNUTLS_RANDOM_SIZE, IV_size * 2, iv_block);
}
if (ret < 0)
return gnutls_assert_val (ret);
if (_gnutls_set_datum (&client_write->IV, iv_block, IV_size) < 0)
return gnutls_assert_val (GNUTLS_E_MEMORY_ERROR);
if (_gnutls_set_datum
(&server_write->IV, &iv_block[IV_size], IV_size) < 0)
return gnutls_assert_val (GNUTLS_E_MEMORY_ERROR);
}
return 0;
}
/**
* gnutls_x509_crl_import:
* @crl: The structure to store the parsed CRL.
* @data: The DER or PEM encoded CRL.
* @format: One of DER or PEM
*
* This function will convert the given DER or PEM encoded CRL
* to the native #gnutls_x509_crl_t format. The output will be stored in 'crl'.
*
* If the CRL is PEM encoded it should have a header of "X509 CRL".
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
* negative error value.
**/
int
gnutls_x509_crl_import(gnutls_x509_crl_t crl,
const gnutls_datum_t * data,
gnutls_x509_crt_fmt_t format)
{
int result = 0;
if (crl == NULL) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
_gnutls_free_datum(&crl->der);
/* If the CRL is in PEM format then decode it
*/
if (format == GNUTLS_X509_FMT_PEM) {
result =
_gnutls_fbase64_decode(PEM_CRL, data->data, data->size,
&crl->der);
if (result < 0) {
gnutls_assert();
return result;
}
} else {
result = _gnutls_set_datum(&crl->der, data->data, data->size);
if (result < 0) {
gnutls_assert();
return result;
}
}
if (crl->expanded) {
result = crl_reinit(crl);
if (result < 0) {
gnutls_assert();
goto cleanup;
}
}
crl->expanded = 1;
result =
asn1_der_decoding(&crl->crl, crl->der.data, crl->der.size, NULL);
if (result != ASN1_SUCCESS) {
result = _gnutls_asn2err(result);
gnutls_assert();
goto cleanup;
}
result = _gnutls_x509_get_raw_field2(crl->crl, &crl->der,
"tbsCertList.issuer.rdnSequence",
&crl->raw_issuer_dn);
if (result < 0) {
gnutls_assert();
goto cleanup;
}
return 0;
cleanup:
_gnutls_free_datum(&crl->der);
return result;
}
/* This function is to be called after handshake, when master_secret,
* client_random and server_random have been initialized.
* This function creates the keys and stores them into pending session.
* (session->cipher_specs)
*/
static int
_gnutls_set_keys(gnutls_session_t session, record_parameters_st * params,
int hash_size, int IV_size, int key_size)
{
/* FIXME: This function is too long
*/
uint8_t rnd[2 * GNUTLS_RANDOM_SIZE];
uint8_t rrnd[2 * GNUTLS_RANDOM_SIZE];
int pos, ret;
int block_size;
char buf[65];
/* avoid using malloc */
uint8_t key_block[2 * MAX_HASH_SIZE + 2 * MAX_CIPHER_KEY_SIZE +
2 * MAX_CIPHER_BLOCK_SIZE];
record_state_st *client_write, *server_write;
if (session->security_parameters.entity == GNUTLS_CLIENT) {
client_write = ¶ms->write;
server_write = ¶ms->read;
} else {
client_write = ¶ms->read;
server_write = ¶ms->write;
}
block_size = 2 * hash_size + 2 * key_size;
block_size += 2 * IV_size;
memcpy(rnd, session->security_parameters.server_random,
GNUTLS_RANDOM_SIZE);
memcpy(&rnd[GNUTLS_RANDOM_SIZE],
session->security_parameters.client_random,
GNUTLS_RANDOM_SIZE);
memcpy(rrnd, session->security_parameters.client_random,
GNUTLS_RANDOM_SIZE);
memcpy(&rrnd[GNUTLS_RANDOM_SIZE],
session->security_parameters.server_random,
GNUTLS_RANDOM_SIZE);
if (get_num_version(session) == GNUTLS_SSL3) { /* SSL 3 */
ret =
_gnutls_ssl3_generate_random
(session->security_parameters.master_secret,
GNUTLS_MASTER_SIZE, rnd, 2 * GNUTLS_RANDOM_SIZE,
block_size, key_block);
} else { /* TLS 1.0 */
ret =
_gnutls_PRF(session,
session->security_parameters.master_secret,
GNUTLS_MASTER_SIZE, keyexp, keyexp_length,
rnd, 2 * GNUTLS_RANDOM_SIZE, block_size,
key_block);
}
if (ret < 0)
return gnutls_assert_val(ret);
_gnutls_hard_log("INT: KEY BLOCK[%d]: %s\n", block_size,
_gnutls_bin2hex(key_block, block_size, buf,
sizeof(buf), NULL));
pos = 0;
if (hash_size > 0) {
if (_gnutls_set_datum
(&client_write->mac_secret, &key_block[pos],
hash_size) < 0)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
pos += hash_size;
if (_gnutls_set_datum
(&server_write->mac_secret, &key_block[pos],
hash_size) < 0)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
pos += hash_size;
}
if (key_size > 0) {
uint8_t *client_write_key, *server_write_key;
int client_write_key_size, server_write_key_size;
client_write_key = &key_block[pos];
client_write_key_size = key_size;
pos += key_size;
server_write_key = &key_block[pos];
server_write_key_size = key_size;
pos += key_size;
if (_gnutls_set_datum
(&client_write->key, client_write_key,
client_write_key_size) < 0)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
_gnutls_hard_log("INT: CLIENT WRITE KEY [%d]: %s\n",
client_write_key_size,
_gnutls_bin2hex(client_write_key,
client_write_key_size,
buf, sizeof(buf), NULL));
if (_gnutls_set_datum
(&server_write->key, server_write_key,
server_write_key_size) < 0)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
_gnutls_hard_log("INT: SERVER WRITE KEY [%d]: %s\n",
server_write_key_size,
_gnutls_bin2hex(server_write_key,
server_write_key_size,
buf, sizeof(buf), NULL));
}
/* IV generation in export and non export ciphers.
*/
if (IV_size > 0) {
if (_gnutls_set_datum
(&client_write->IV, &key_block[pos], IV_size) < 0)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
pos += IV_size;
if (_gnutls_set_datum
(&server_write->IV, &key_block[pos], IV_size) < 0)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
_gnutls_hard_log("INT: CLIENT WRITE IV [%d]: %s\n",
client_write->IV.size,
_gnutls_bin2hex(client_write->IV.data,
client_write->IV.size,
buf, sizeof(buf), NULL));
_gnutls_hard_log("INT: SERVER WRITE IV [%d]: %s\n",
server_write->IV.size,
_gnutls_bin2hex(server_write->IV.data,
server_write->IV.size,
buf, sizeof(buf), NULL));
}
return 0;
}
int _gnutls_recv_server_certificate_status(gnutls_session_t session)
{
uint8_t *data;
int data_size;
size_t r_size;
gnutls_buffer_st buf;
int ret;
status_request_ext_st *priv = NULL;
extension_priv_data_t epriv;
ret =
_gnutls_ext_get_session_data(session,
GNUTLS_EXTENSION_STATUS_REQUEST,
&epriv);
if (ret < 0)
return 0;
priv = epriv.ptr;
if (!priv->expect_cstatus)
return 0;
ret = _gnutls_recv_handshake(session,
GNUTLS_HANDSHAKE_CERTIFICATE_STATUS,
0, &buf);
if (ret < 0)
return gnutls_assert_val_fatal(ret);
priv->expect_cstatus = 0;
data = buf.data;
data_size = buf.length;
/* minimum message is type (1) + response (3) + data */
if (data_size == 0)
return 0;
else if (data_size < 4)
return
gnutls_assert_val(GNUTLS_E_UNEXPECTED_PACKET_LENGTH);
if (data[0] != 0x01) {
gnutls_assert();
_gnutls_handshake_log("EXT[%p]: unknown status_type %d\n",
session, data[0]);
return 0;
}
DECR_LENGTH_COM(data_size, 1, ret =
GNUTLS_E_UNEXPECTED_PACKET_LENGTH;
goto error);
data++;
DECR_LENGTH_COM(data_size, 3, ret =
GNUTLS_E_UNEXPECTED_PACKET_LENGTH;
goto error);
r_size = _gnutls_read_uint24(data);
data += 3;
DECR_LENGTH_COM(data_size, r_size, ret =
GNUTLS_E_UNEXPECTED_PACKET_LENGTH;
goto error);
ret = _gnutls_set_datum(&priv->response, data, r_size);
if (ret < 0)
goto error;
ret = 0;
error:
_gnutls_buffer_clear(&buf);
return ret;
}
/* Generates the PSK client key exchange
*
*
* struct {
* select (KeyExchangeAlgorithm) {
* opaque psk_identity<0..2^16-1>;
* } exchange_keys;
* } ClientKeyExchange;
*
*/
int
_gnutls_gen_psk_client_kx (gnutls_session_t session, opaque ** data)
{
int ret;
gnutls_psk_client_credentials_t cred;
cred = (gnutls_psk_client_credentials_t)
_gnutls_get_cred (session->key, GNUTLS_CRD_PSK, NULL);
if (cred == NULL)
{
gnutls_assert ();
return GNUTLS_E_INSUFFICIENT_CREDENTIALS;
}
if (cred->username.data == NULL && cred->key.data == NULL &&
cred->get_function != NULL)
{
char *username;
gnutls_datum_t key;
ret = cred->get_function (session, &username, &key);
if (ret)
{
gnutls_assert ();
return ret;
}
ret = _gnutls_set_datum (&cred->username, username, strlen (username));
gnutls_free (username);
if (ret < 0)
{
gnutls_assert ();
_gnutls_free_datum (&key);
return ret;
}
ret = _gnutls_set_datum (&cred->key, key.data, key.size);
_gnutls_free_datum (&key);
if (ret < 0)
{
gnutls_assert ();
return GNUTLS_E_MEMORY_ERROR;
}
}
else if (cred->username.data == NULL || cred->key.data == NULL)
{
gnutls_assert ();
return GNUTLS_E_INSUFFICIENT_CREDENTIALS;
}
ret = _gnutls_set_psk_session_key (session, NULL);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
(*data) = gnutls_malloc (2 + cred->username.size);
if ((*data) == NULL)
{
gnutls_assert ();
return GNUTLS_E_MEMORY_ERROR;
}
_gnutls_write_datum16 (*data, cred->username);
return (cred->username.size + 2);
}
/* Upack certificate info.
*/
static int
unpack_certificate_auth_info (gnutls_session_t session,
const gnutls_datum_t * packed_session)
{
int pos = 0, size, ret;
unsigned int i = 0, j;
size_t pack_size;
cert_auth_info_t info;
if (packed_session->data[0] != GNUTLS_CRD_CERTIFICATE)
{
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
pack_size = _gnutls_read_uint32 (&packed_session->data[PACK_HEADER_SIZE]);
pos += PACK_HEADER_SIZE + 4;
if (pack_size == 0)
return 0; /* nothing to be done */
/* a simple check for integrity */
if (pack_size + PACK_HEADER_SIZE + 4 > packed_session->size)
{
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
/* client and server have the same auth_info here
*/
ret =
_gnutls_auth_info_set (session, GNUTLS_CRD_CERTIFICATE,
sizeof (cert_auth_info_st), 1);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
info = _gnutls_get_auth_info (session);
if (info == NULL)
{
gnutls_assert ();
return GNUTLS_E_INTERNAL_ERROR;
}
info->dh.secret_bits = _gnutls_read_uint16 (&packed_session->data[pos]);
pos += 2;
size = _gnutls_read_uint32 (&packed_session->data[pos]);
pos += 4;
ret = _gnutls_set_datum (&info->dh.prime, &packed_session->data[pos], size);
if (ret < 0)
{
gnutls_assert ();
goto error;
}
pos += size;
size = _gnutls_read_uint32 (&packed_session->data[pos]);
pos += 4;
ret =
_gnutls_set_datum (&info->dh.generator, &packed_session->data[pos], size);
if (ret < 0)
{
gnutls_assert ();
goto error;
}
pos += size;
size = _gnutls_read_uint32 (&packed_session->data[pos]);
pos += 4;
ret =
_gnutls_set_datum (&info->dh.public_key, &packed_session->data[pos],
size);
if (ret < 0)
{
gnutls_assert ();
goto error;
}
pos += size;
size = _gnutls_read_uint32 (&packed_session->data[pos]);
pos += 4;
ret =
_gnutls_set_datum (&info->rsa_export.modulus,
&packed_session->data[pos], size);
if (ret < 0)
{
gnutls_assert ();
goto error;
}
pos += size;
size = _gnutls_read_uint32 (&packed_session->data[pos]);
pos += 4;
ret =
_gnutls_set_datum (&info->rsa_export.exponent,
&packed_session->data[pos], size);
if (ret < 0)
{
gnutls_assert ();
goto error;
}
pos += size;
info->ncerts = _gnutls_read_uint32 (&packed_session->data[pos]);
pos += 4;
if (info->ncerts > 0)
{
info->raw_certificate_list =
gnutls_calloc (1, sizeof (gnutls_datum_t) * info->ncerts);
if (info->raw_certificate_list == NULL)
{
gnutls_assert ();
ret = GNUTLS_E_MEMORY_ERROR;
goto error;
}
}
for (i = 0; i < info->ncerts; i++)
{
size = _gnutls_read_uint32 (&packed_session->data[pos]);
pos += sizeof (uint32_t);
ret =
_gnutls_set_datum (&info->raw_certificate_list[i],
&packed_session->data[pos], size);
pos += size;
if (ret < 0)
{
gnutls_assert ();
goto error;
}
}
return 0;
error:
_gnutls_free_datum (&info->dh.prime);
_gnutls_free_datum (&info->dh.generator);
_gnutls_free_datum (&info->dh.public_key);
_gnutls_free_datum (&info->rsa_export.modulus);
_gnutls_free_datum (&info->rsa_export.exponent);
for (j = 0; j < i; j++)
_gnutls_free_datum (&info->raw_certificate_list[j]);
gnutls_free (info->raw_certificate_list);
return ret;
}
