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ssl_tls.c
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ssl_tls.c
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/*
* TLS shared functions
*
* Copyright The Mbed TLS Contributors
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
*/
/*
* http://www.ietf.org/rfc/rfc2246.txt
* http://www.ietf.org/rfc/rfc4346.txt
*/
#include "ssl_misc.h"
#if defined(MBEDTLS_SSL_TLS_C)
#include "mbedtls/platform.h"
#include "mbedtls/ssl.h"
#include "ssl_client.h"
#include "ssl_debug_helpers.h"
#include "debug_internal.h"
#include "mbedtls/error.h"
#include "mbedtls/platform_util.h"
#include "mbedtls/version.h"
#include "mbedtls/constant_time.h"
#include <string.h>
#if defined(MBEDTLS_USE_PSA_CRYPTO)
#include "mbedtls/psa_util.h"
#include "md_psa.h"
#include "psa_util_internal.h"
#include "psa/crypto.h"
#endif
#if defined(MBEDTLS_X509_CRT_PARSE_C)
#include "mbedtls/oid.h"
#endif
#if defined(MBEDTLS_USE_PSA_CRYPTO)
/* Define local translating functions to save code size by not using too many
* arguments in each translating place. */
static int local_err_translation(psa_status_t status)
{
return psa_status_to_mbedtls(status, psa_to_ssl_errors,
ARRAY_LENGTH(psa_to_ssl_errors),
psa_generic_status_to_mbedtls);
}
#define PSA_TO_MBEDTLS_ERR(status) local_err_translation(status)
#endif
#if defined(MBEDTLS_TEST_HOOKS)
static mbedtls_ssl_chk_buf_ptr_args chk_buf_ptr_fail_args;
void mbedtls_ssl_set_chk_buf_ptr_fail_args(
const uint8_t *cur, const uint8_t *end, size_t need)
{
chk_buf_ptr_fail_args.cur = cur;
chk_buf_ptr_fail_args.end = end;
chk_buf_ptr_fail_args.need = need;
}
void mbedtls_ssl_reset_chk_buf_ptr_fail_args(void)
{
memset(&chk_buf_ptr_fail_args, 0, sizeof(chk_buf_ptr_fail_args));
}
int mbedtls_ssl_cmp_chk_buf_ptr_fail_args(mbedtls_ssl_chk_buf_ptr_args *args)
{
return (chk_buf_ptr_fail_args.cur != args->cur) ||
(chk_buf_ptr_fail_args.end != args->end) ||
(chk_buf_ptr_fail_args.need != args->need);
}
#endif /* MBEDTLS_TEST_HOOKS */
#if defined(MBEDTLS_SSL_PROTO_DTLS)
#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
/* Top-level Connection ID API */
int mbedtls_ssl_conf_cid(mbedtls_ssl_config *conf,
size_t len,
int ignore_other_cid)
{
if (len > MBEDTLS_SSL_CID_IN_LEN_MAX) {
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
}
if (ignore_other_cid != MBEDTLS_SSL_UNEXPECTED_CID_FAIL &&
ignore_other_cid != MBEDTLS_SSL_UNEXPECTED_CID_IGNORE) {
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
}
conf->ignore_unexpected_cid = ignore_other_cid;
conf->cid_len = len;
return 0;
}
int mbedtls_ssl_set_cid(mbedtls_ssl_context *ssl,
int enable,
unsigned char const *own_cid,
size_t own_cid_len)
{
if (ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM) {
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
}
ssl->negotiate_cid = enable;
if (enable == MBEDTLS_SSL_CID_DISABLED) {
MBEDTLS_SSL_DEBUG_MSG(3, ("Disable use of CID extension."));
return 0;
}
MBEDTLS_SSL_DEBUG_MSG(3, ("Enable use of CID extension."));
MBEDTLS_SSL_DEBUG_BUF(3, "Own CID", own_cid, own_cid_len);
if (own_cid_len != ssl->conf->cid_len) {
MBEDTLS_SSL_DEBUG_MSG(3, ("CID length %u does not match CID length %u in config",
(unsigned) own_cid_len,
(unsigned) ssl->conf->cid_len));
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
}
memcpy(ssl->own_cid, own_cid, own_cid_len);
/* Truncation is not an issue here because
* MBEDTLS_SSL_CID_IN_LEN_MAX at most 255. */
ssl->own_cid_len = (uint8_t) own_cid_len;
return 0;
}
int mbedtls_ssl_get_own_cid(mbedtls_ssl_context *ssl,
int *enabled,
unsigned char own_cid[MBEDTLS_SSL_CID_IN_LEN_MAX],
size_t *own_cid_len)
{
*enabled = MBEDTLS_SSL_CID_DISABLED;
if (ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM) {
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
}
/* We report MBEDTLS_SSL_CID_DISABLED in case the CID length is
* zero as this is indistinguishable from not requesting to use
* the CID extension. */
if (ssl->own_cid_len == 0 || ssl->negotiate_cid == MBEDTLS_SSL_CID_DISABLED) {
return 0;
}
if (own_cid_len != NULL) {
*own_cid_len = ssl->own_cid_len;
if (own_cid != NULL) {
memcpy(own_cid, ssl->own_cid, ssl->own_cid_len);
}
}
*enabled = MBEDTLS_SSL_CID_ENABLED;
return 0;
}
int mbedtls_ssl_get_peer_cid(mbedtls_ssl_context *ssl,
int *enabled,
unsigned char peer_cid[MBEDTLS_SSL_CID_OUT_LEN_MAX],
size_t *peer_cid_len)
{
*enabled = MBEDTLS_SSL_CID_DISABLED;
if (ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM ||
mbedtls_ssl_is_handshake_over(ssl) == 0) {
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
}
/* We report MBEDTLS_SSL_CID_DISABLED in case the CID extensions
* were used, but client and server requested the empty CID.
* This is indistinguishable from not using the CID extension
* in the first place. */
if (ssl->transform_in->in_cid_len == 0 &&
ssl->transform_in->out_cid_len == 0) {
return 0;
}
if (peer_cid_len != NULL) {
*peer_cid_len = ssl->transform_in->out_cid_len;
if (peer_cid != NULL) {
memcpy(peer_cid, ssl->transform_in->out_cid,
ssl->transform_in->out_cid_len);
}
}
*enabled = MBEDTLS_SSL_CID_ENABLED;
return 0;
}
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
#endif /* MBEDTLS_SSL_PROTO_DTLS */
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
/*
* Convert max_fragment_length codes to length.
* RFC 6066 says:
* enum{
* 2^9(1), 2^10(2), 2^11(3), 2^12(4), (255)
* } MaxFragmentLength;
* and we add 0 -> extension unused
*/
static unsigned int ssl_mfl_code_to_length(int mfl)
{
switch (mfl) {
case MBEDTLS_SSL_MAX_FRAG_LEN_NONE:
return MBEDTLS_TLS_EXT_ADV_CONTENT_LEN;
case MBEDTLS_SSL_MAX_FRAG_LEN_512:
return 512;
case MBEDTLS_SSL_MAX_FRAG_LEN_1024:
return 1024;
case MBEDTLS_SSL_MAX_FRAG_LEN_2048:
return 2048;
case MBEDTLS_SSL_MAX_FRAG_LEN_4096:
return 4096;
default:
return MBEDTLS_TLS_EXT_ADV_CONTENT_LEN;
}
}
#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
int mbedtls_ssl_session_copy(mbedtls_ssl_session *dst,
const mbedtls_ssl_session *src)
{
mbedtls_ssl_session_free(dst);
memcpy(dst, src, sizeof(mbedtls_ssl_session));
#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
dst->ticket = NULL;
#if defined(MBEDTLS_SSL_PROTO_TLS1_3) && \
defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
dst->hostname = NULL;
#endif
#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */
#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_ALPN) && \
defined(MBEDTLS_SSL_EARLY_DATA)
dst->ticket_alpn = NULL;
#endif
#if defined(MBEDTLS_X509_CRT_PARSE_C)
#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
if (src->peer_cert != NULL) {
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
dst->peer_cert = mbedtls_calloc(1, sizeof(mbedtls_x509_crt));
if (dst->peer_cert == NULL) {
return MBEDTLS_ERR_SSL_ALLOC_FAILED;
}
mbedtls_x509_crt_init(dst->peer_cert);
if ((ret = mbedtls_x509_crt_parse_der(dst->peer_cert, src->peer_cert->raw.p,
src->peer_cert->raw.len)) != 0) {
mbedtls_free(dst->peer_cert);
dst->peer_cert = NULL;
return ret;
}
}
#else /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
if (src->peer_cert_digest != NULL) {
dst->peer_cert_digest =
mbedtls_calloc(1, src->peer_cert_digest_len);
if (dst->peer_cert_digest == NULL) {
return MBEDTLS_ERR_SSL_ALLOC_FAILED;
}
memcpy(dst->peer_cert_digest, src->peer_cert_digest,
src->peer_cert_digest_len);
dst->peer_cert_digest_type = src->peer_cert_digest_type;
dst->peer_cert_digest_len = src->peer_cert_digest_len;
}
#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
#endif /* MBEDTLS_X509_CRT_PARSE_C */
#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_ALPN) && \
defined(MBEDTLS_SSL_EARLY_DATA)
{
int ret = mbedtls_ssl_session_set_ticket_alpn(dst, src->ticket_alpn);
if (ret != 0) {
return ret;
}
}
#endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_ALPN && MBEDTLS_SSL_EARLY_DATA */
#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
if (src->ticket != NULL) {
dst->ticket = mbedtls_calloc(1, src->ticket_len);
if (dst->ticket == NULL) {
return MBEDTLS_ERR_SSL_ALLOC_FAILED;
}
memcpy(dst->ticket, src->ticket, src->ticket_len);
}
#if defined(MBEDTLS_SSL_PROTO_TLS1_3) && \
defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
if (src->endpoint == MBEDTLS_SSL_IS_CLIENT) {
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
ret = mbedtls_ssl_session_set_hostname(dst, src->hostname);
if (ret != 0) {
return ret;
}
}
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 &&
MBEDTLS_SSL_SERVER_NAME_INDICATION */
#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */
return 0;
}
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
MBEDTLS_CHECK_RETURN_CRITICAL
static int resize_buffer(unsigned char **buffer, size_t len_new, size_t *len_old)
{
unsigned char *resized_buffer = mbedtls_calloc(1, len_new);
if (resized_buffer == NULL) {
return MBEDTLS_ERR_SSL_ALLOC_FAILED;
}
/* We want to copy len_new bytes when downsizing the buffer, and
* len_old bytes when upsizing, so we choose the smaller of two sizes,
* to fit one buffer into another. Size checks, ensuring that no data is
* lost, are done outside of this function. */
memcpy(resized_buffer, *buffer,
(len_new < *len_old) ? len_new : *len_old);
mbedtls_zeroize_and_free(*buffer, *len_old);
*buffer = resized_buffer;
*len_old = len_new;
return 0;
}
static void handle_buffer_resizing(mbedtls_ssl_context *ssl, int downsizing,
size_t in_buf_new_len,
size_t out_buf_new_len)
{
int modified = 0;
size_t written_in = 0, iv_offset_in = 0, len_offset_in = 0;
size_t written_out = 0, iv_offset_out = 0, len_offset_out = 0;
if (ssl->in_buf != NULL) {
written_in = ssl->in_msg - ssl->in_buf;
iv_offset_in = ssl->in_iv - ssl->in_buf;
len_offset_in = ssl->in_len - ssl->in_buf;
if (downsizing ?
ssl->in_buf_len > in_buf_new_len && ssl->in_left < in_buf_new_len :
ssl->in_buf_len < in_buf_new_len) {
if (resize_buffer(&ssl->in_buf, in_buf_new_len, &ssl->in_buf_len) != 0) {
MBEDTLS_SSL_DEBUG_MSG(1, ("input buffer resizing failed - out of memory"));
} else {
MBEDTLS_SSL_DEBUG_MSG(2, ("Reallocating in_buf to %" MBEDTLS_PRINTF_SIZET,
in_buf_new_len));
modified = 1;
}
}
}
if (ssl->out_buf != NULL) {
written_out = ssl->out_msg - ssl->out_buf;
iv_offset_out = ssl->out_iv - ssl->out_buf;
len_offset_out = ssl->out_len - ssl->out_buf;
if (downsizing ?
ssl->out_buf_len > out_buf_new_len && ssl->out_left < out_buf_new_len :
ssl->out_buf_len < out_buf_new_len) {
if (resize_buffer(&ssl->out_buf, out_buf_new_len, &ssl->out_buf_len) != 0) {
MBEDTLS_SSL_DEBUG_MSG(1, ("output buffer resizing failed - out of memory"));
} else {
MBEDTLS_SSL_DEBUG_MSG(2, ("Reallocating out_buf to %" MBEDTLS_PRINTF_SIZET,
out_buf_new_len));
modified = 1;
}
}
}
if (modified) {
/* Update pointers here to avoid doing it twice. */
mbedtls_ssl_reset_in_out_pointers(ssl);
/* Fields below might not be properly updated with record
* splitting or with CID, so they are manually updated here. */
ssl->out_msg = ssl->out_buf + written_out;
ssl->out_len = ssl->out_buf + len_offset_out;
ssl->out_iv = ssl->out_buf + iv_offset_out;
ssl->in_msg = ssl->in_buf + written_in;
ssl->in_len = ssl->in_buf + len_offset_in;
ssl->in_iv = ssl->in_buf + iv_offset_in;
}
}
#endif /* MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH */
#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
#if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION)
typedef int (*tls_prf_fn)(const unsigned char *secret, size_t slen,
const char *label,
const unsigned char *random, size_t rlen,
unsigned char *dstbuf, size_t dlen);
static tls_prf_fn ssl_tls12prf_from_cs(int ciphersuite_id);
#endif /* MBEDTLS_SSL_CONTEXT_SERIALIZATION */
/* Type for the TLS PRF */
typedef int ssl_tls_prf_t(const unsigned char *, size_t, const char *,
const unsigned char *, size_t,
unsigned char *, size_t);
MBEDTLS_CHECK_RETURN_CRITICAL
static int ssl_tls12_populate_transform(mbedtls_ssl_transform *transform,
int ciphersuite,
const unsigned char master[48],
#if defined(MBEDTLS_SSL_SOME_SUITES_USE_CBC_ETM)
int encrypt_then_mac,
#endif /* MBEDTLS_SSL_SOME_SUITES_USE_CBC_ETM */
ssl_tls_prf_t tls_prf,
const unsigned char randbytes[64],
mbedtls_ssl_protocol_version tls_version,
unsigned endpoint,
const mbedtls_ssl_context *ssl);
#if defined(PSA_WANT_ALG_SHA_256)
MBEDTLS_CHECK_RETURN_CRITICAL
static int tls_prf_sha256(const unsigned char *secret, size_t slen,
const char *label,
const unsigned char *random, size_t rlen,
unsigned char *dstbuf, size_t dlen);
static int ssl_calc_verify_tls_sha256(const mbedtls_ssl_context *, unsigned char *, size_t *);
static int ssl_calc_finished_tls_sha256(mbedtls_ssl_context *, unsigned char *, int);
#endif /* PSA_WANT_ALG_SHA_256*/
#if defined(PSA_WANT_ALG_SHA_384)
MBEDTLS_CHECK_RETURN_CRITICAL
static int tls_prf_sha384(const unsigned char *secret, size_t slen,
const char *label,
const unsigned char *random, size_t rlen,
unsigned char *dstbuf, size_t dlen);
static int ssl_calc_verify_tls_sha384(const mbedtls_ssl_context *, unsigned char *, size_t *);
static int ssl_calc_finished_tls_sha384(mbedtls_ssl_context *, unsigned char *, int);
#endif /* PSA_WANT_ALG_SHA_384*/
MBEDTLS_CHECK_RETURN_CRITICAL
static int ssl_tls12_session_load(mbedtls_ssl_session *session,
const unsigned char *buf,
size_t len);
#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
static int ssl_update_checksum_start(mbedtls_ssl_context *, const unsigned char *, size_t);
#if defined(PSA_WANT_ALG_SHA_256)
static int ssl_update_checksum_sha256(mbedtls_ssl_context *, const unsigned char *, size_t);
#endif /* PSA_WANT_ALG_SHA_256*/
#if defined(PSA_WANT_ALG_SHA_384)
static int ssl_update_checksum_sha384(mbedtls_ssl_context *, const unsigned char *, size_t);
#endif /* PSA_WANT_ALG_SHA_384*/
int mbedtls_ssl_tls_prf(const mbedtls_tls_prf_types prf,
const unsigned char *secret, size_t slen,
const char *label,
const unsigned char *random, size_t rlen,
unsigned char *dstbuf, size_t dlen)
{
mbedtls_ssl_tls_prf_cb *tls_prf = NULL;
switch (prf) {
#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
#if defined(PSA_WANT_ALG_SHA_384)
case MBEDTLS_SSL_TLS_PRF_SHA384:
tls_prf = tls_prf_sha384;
break;
#endif /* PSA_WANT_ALG_SHA_384*/
#if defined(PSA_WANT_ALG_SHA_256)
case MBEDTLS_SSL_TLS_PRF_SHA256:
tls_prf = tls_prf_sha256;
break;
#endif /* PSA_WANT_ALG_SHA_256*/
#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
default:
return MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
}
return tls_prf(secret, slen, label, random, rlen, dstbuf, dlen);
}
#if defined(MBEDTLS_X509_CRT_PARSE_C)
static void ssl_clear_peer_cert(mbedtls_ssl_session *session)
{
#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
if (session->peer_cert != NULL) {
mbedtls_x509_crt_free(session->peer_cert);
mbedtls_free(session->peer_cert);
session->peer_cert = NULL;
}
#else /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
if (session->peer_cert_digest != NULL) {
/* Zeroization is not necessary. */
mbedtls_free(session->peer_cert_digest);
session->peer_cert_digest = NULL;
session->peer_cert_digest_type = MBEDTLS_MD_NONE;
session->peer_cert_digest_len = 0;
}
#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
}
#endif /* MBEDTLS_X509_CRT_PARSE_C */
uint32_t mbedtls_ssl_get_extension_id(unsigned int extension_type)
{
switch (extension_type) {
case MBEDTLS_TLS_EXT_SERVERNAME:
return MBEDTLS_SSL_EXT_ID_SERVERNAME;
case MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH:
return MBEDTLS_SSL_EXT_ID_MAX_FRAGMENT_LENGTH;
case MBEDTLS_TLS_EXT_STATUS_REQUEST:
return MBEDTLS_SSL_EXT_ID_STATUS_REQUEST;
case MBEDTLS_TLS_EXT_SUPPORTED_GROUPS:
return MBEDTLS_SSL_EXT_ID_SUPPORTED_GROUPS;
case MBEDTLS_TLS_EXT_SIG_ALG:
return MBEDTLS_SSL_EXT_ID_SIG_ALG;
case MBEDTLS_TLS_EXT_USE_SRTP:
return MBEDTLS_SSL_EXT_ID_USE_SRTP;
case MBEDTLS_TLS_EXT_HEARTBEAT:
return MBEDTLS_SSL_EXT_ID_HEARTBEAT;
case MBEDTLS_TLS_EXT_ALPN:
return MBEDTLS_SSL_EXT_ID_ALPN;
case MBEDTLS_TLS_EXT_SCT:
return MBEDTLS_SSL_EXT_ID_SCT;
case MBEDTLS_TLS_EXT_CLI_CERT_TYPE:
return MBEDTLS_SSL_EXT_ID_CLI_CERT_TYPE;
case MBEDTLS_TLS_EXT_SERV_CERT_TYPE:
return MBEDTLS_SSL_EXT_ID_SERV_CERT_TYPE;
case MBEDTLS_TLS_EXT_PADDING:
return MBEDTLS_SSL_EXT_ID_PADDING;
case MBEDTLS_TLS_EXT_PRE_SHARED_KEY:
return MBEDTLS_SSL_EXT_ID_PRE_SHARED_KEY;
case MBEDTLS_TLS_EXT_EARLY_DATA:
return MBEDTLS_SSL_EXT_ID_EARLY_DATA;
case MBEDTLS_TLS_EXT_SUPPORTED_VERSIONS:
return MBEDTLS_SSL_EXT_ID_SUPPORTED_VERSIONS;
case MBEDTLS_TLS_EXT_COOKIE:
return MBEDTLS_SSL_EXT_ID_COOKIE;
case MBEDTLS_TLS_EXT_PSK_KEY_EXCHANGE_MODES:
return MBEDTLS_SSL_EXT_ID_PSK_KEY_EXCHANGE_MODES;
case MBEDTLS_TLS_EXT_CERT_AUTH:
return MBEDTLS_SSL_EXT_ID_CERT_AUTH;
case MBEDTLS_TLS_EXT_OID_FILTERS:
return MBEDTLS_SSL_EXT_ID_OID_FILTERS;
case MBEDTLS_TLS_EXT_POST_HANDSHAKE_AUTH:
return MBEDTLS_SSL_EXT_ID_POST_HANDSHAKE_AUTH;
case MBEDTLS_TLS_EXT_SIG_ALG_CERT:
return MBEDTLS_SSL_EXT_ID_SIG_ALG_CERT;
case MBEDTLS_TLS_EXT_KEY_SHARE:
return MBEDTLS_SSL_EXT_ID_KEY_SHARE;
case MBEDTLS_TLS_EXT_TRUNCATED_HMAC:
return MBEDTLS_SSL_EXT_ID_TRUNCATED_HMAC;
case MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS:
return MBEDTLS_SSL_EXT_ID_SUPPORTED_POINT_FORMATS;
case MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC:
return MBEDTLS_SSL_EXT_ID_ENCRYPT_THEN_MAC;
case MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET:
return MBEDTLS_SSL_EXT_ID_EXTENDED_MASTER_SECRET;
case MBEDTLS_TLS_EXT_RECORD_SIZE_LIMIT:
return MBEDTLS_SSL_EXT_ID_RECORD_SIZE_LIMIT;
case MBEDTLS_TLS_EXT_SESSION_TICKET:
return MBEDTLS_SSL_EXT_ID_SESSION_TICKET;
}
return MBEDTLS_SSL_EXT_ID_UNRECOGNIZED;
}
uint32_t mbedtls_ssl_get_extension_mask(unsigned int extension_type)
{
return 1 << mbedtls_ssl_get_extension_id(extension_type);
}
#if defined(MBEDTLS_DEBUG_C)
static const char *extension_name_table[] = {
[MBEDTLS_SSL_EXT_ID_UNRECOGNIZED] = "unrecognized",
[MBEDTLS_SSL_EXT_ID_SERVERNAME] = "server_name",
[MBEDTLS_SSL_EXT_ID_MAX_FRAGMENT_LENGTH] = "max_fragment_length",
[MBEDTLS_SSL_EXT_ID_STATUS_REQUEST] = "status_request",
[MBEDTLS_SSL_EXT_ID_SUPPORTED_GROUPS] = "supported_groups",
[MBEDTLS_SSL_EXT_ID_SIG_ALG] = "signature_algorithms",
[MBEDTLS_SSL_EXT_ID_USE_SRTP] = "use_srtp",
[MBEDTLS_SSL_EXT_ID_HEARTBEAT] = "heartbeat",
[MBEDTLS_SSL_EXT_ID_ALPN] = "application_layer_protocol_negotiation",
[MBEDTLS_SSL_EXT_ID_SCT] = "signed_certificate_timestamp",
[MBEDTLS_SSL_EXT_ID_CLI_CERT_TYPE] = "client_certificate_type",
[MBEDTLS_SSL_EXT_ID_SERV_CERT_TYPE] = "server_certificate_type",
[MBEDTLS_SSL_EXT_ID_PADDING] = "padding",
[MBEDTLS_SSL_EXT_ID_PRE_SHARED_KEY] = "pre_shared_key",
[MBEDTLS_SSL_EXT_ID_EARLY_DATA] = "early_data",
[MBEDTLS_SSL_EXT_ID_SUPPORTED_VERSIONS] = "supported_versions",
[MBEDTLS_SSL_EXT_ID_COOKIE] = "cookie",
[MBEDTLS_SSL_EXT_ID_PSK_KEY_EXCHANGE_MODES] = "psk_key_exchange_modes",
[MBEDTLS_SSL_EXT_ID_CERT_AUTH] = "certificate_authorities",
[MBEDTLS_SSL_EXT_ID_OID_FILTERS] = "oid_filters",
[MBEDTLS_SSL_EXT_ID_POST_HANDSHAKE_AUTH] = "post_handshake_auth",
[MBEDTLS_SSL_EXT_ID_SIG_ALG_CERT] = "signature_algorithms_cert",
[MBEDTLS_SSL_EXT_ID_KEY_SHARE] = "key_share",
[MBEDTLS_SSL_EXT_ID_TRUNCATED_HMAC] = "truncated_hmac",
[MBEDTLS_SSL_EXT_ID_SUPPORTED_POINT_FORMATS] = "supported_point_formats",
[MBEDTLS_SSL_EXT_ID_ENCRYPT_THEN_MAC] = "encrypt_then_mac",
[MBEDTLS_SSL_EXT_ID_EXTENDED_MASTER_SECRET] = "extended_master_secret",
[MBEDTLS_SSL_EXT_ID_SESSION_TICKET] = "session_ticket",
[MBEDTLS_SSL_EXT_ID_RECORD_SIZE_LIMIT] = "record_size_limit"
};
static const unsigned int extension_type_table[] = {
[MBEDTLS_SSL_EXT_ID_UNRECOGNIZED] = 0xff,
[MBEDTLS_SSL_EXT_ID_SERVERNAME] = MBEDTLS_TLS_EXT_SERVERNAME,
[MBEDTLS_SSL_EXT_ID_MAX_FRAGMENT_LENGTH] = MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH,
[MBEDTLS_SSL_EXT_ID_STATUS_REQUEST] = MBEDTLS_TLS_EXT_STATUS_REQUEST,
[MBEDTLS_SSL_EXT_ID_SUPPORTED_GROUPS] = MBEDTLS_TLS_EXT_SUPPORTED_GROUPS,
[MBEDTLS_SSL_EXT_ID_SIG_ALG] = MBEDTLS_TLS_EXT_SIG_ALG,
[MBEDTLS_SSL_EXT_ID_USE_SRTP] = MBEDTLS_TLS_EXT_USE_SRTP,
[MBEDTLS_SSL_EXT_ID_HEARTBEAT] = MBEDTLS_TLS_EXT_HEARTBEAT,
[MBEDTLS_SSL_EXT_ID_ALPN] = MBEDTLS_TLS_EXT_ALPN,
[MBEDTLS_SSL_EXT_ID_SCT] = MBEDTLS_TLS_EXT_SCT,
[MBEDTLS_SSL_EXT_ID_CLI_CERT_TYPE] = MBEDTLS_TLS_EXT_CLI_CERT_TYPE,
[MBEDTLS_SSL_EXT_ID_SERV_CERT_TYPE] = MBEDTLS_TLS_EXT_SERV_CERT_TYPE,
[MBEDTLS_SSL_EXT_ID_PADDING] = MBEDTLS_TLS_EXT_PADDING,
[MBEDTLS_SSL_EXT_ID_PRE_SHARED_KEY] = MBEDTLS_TLS_EXT_PRE_SHARED_KEY,
[MBEDTLS_SSL_EXT_ID_EARLY_DATA] = MBEDTLS_TLS_EXT_EARLY_DATA,
[MBEDTLS_SSL_EXT_ID_SUPPORTED_VERSIONS] = MBEDTLS_TLS_EXT_SUPPORTED_VERSIONS,
[MBEDTLS_SSL_EXT_ID_COOKIE] = MBEDTLS_TLS_EXT_COOKIE,
[MBEDTLS_SSL_EXT_ID_PSK_KEY_EXCHANGE_MODES] = MBEDTLS_TLS_EXT_PSK_KEY_EXCHANGE_MODES,
[MBEDTLS_SSL_EXT_ID_CERT_AUTH] = MBEDTLS_TLS_EXT_CERT_AUTH,
[MBEDTLS_SSL_EXT_ID_OID_FILTERS] = MBEDTLS_TLS_EXT_OID_FILTERS,
[MBEDTLS_SSL_EXT_ID_POST_HANDSHAKE_AUTH] = MBEDTLS_TLS_EXT_POST_HANDSHAKE_AUTH,
[MBEDTLS_SSL_EXT_ID_SIG_ALG_CERT] = MBEDTLS_TLS_EXT_SIG_ALG_CERT,
[MBEDTLS_SSL_EXT_ID_KEY_SHARE] = MBEDTLS_TLS_EXT_KEY_SHARE,
[MBEDTLS_SSL_EXT_ID_TRUNCATED_HMAC] = MBEDTLS_TLS_EXT_TRUNCATED_HMAC,
[MBEDTLS_SSL_EXT_ID_SUPPORTED_POINT_FORMATS] = MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS,
[MBEDTLS_SSL_EXT_ID_ENCRYPT_THEN_MAC] = MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC,
[MBEDTLS_SSL_EXT_ID_EXTENDED_MASTER_SECRET] = MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET,
[MBEDTLS_SSL_EXT_ID_SESSION_TICKET] = MBEDTLS_TLS_EXT_SESSION_TICKET,
[MBEDTLS_SSL_EXT_ID_RECORD_SIZE_LIMIT] = MBEDTLS_TLS_EXT_RECORD_SIZE_LIMIT
};
const char *mbedtls_ssl_get_extension_name(unsigned int extension_type)
{
return extension_name_table[
mbedtls_ssl_get_extension_id(extension_type)];
}
static const char *ssl_tls13_get_hs_msg_name(int hs_msg_type)
{
switch (hs_msg_type) {
case MBEDTLS_SSL_HS_CLIENT_HELLO:
return "ClientHello";
case MBEDTLS_SSL_HS_SERVER_HELLO:
return "ServerHello";
case MBEDTLS_SSL_TLS1_3_HS_HELLO_RETRY_REQUEST:
return "HelloRetryRequest";
case MBEDTLS_SSL_HS_NEW_SESSION_TICKET:
return "NewSessionTicket";
case MBEDTLS_SSL_HS_ENCRYPTED_EXTENSIONS:
return "EncryptedExtensions";
case MBEDTLS_SSL_HS_CERTIFICATE:
return "Certificate";
case MBEDTLS_SSL_HS_CERTIFICATE_REQUEST:
return "CertificateRequest";
}
return "Unknown";
}
void mbedtls_ssl_print_extension(const mbedtls_ssl_context *ssl,
int level, const char *file, int line,
int hs_msg_type, unsigned int extension_type,
const char *extra_msg0, const char *extra_msg1)
{
const char *extra_msg;
if (extra_msg0 && extra_msg1) {
mbedtls_debug_print_msg(
ssl, level, file, line,
"%s: %s(%u) extension %s %s.",
ssl_tls13_get_hs_msg_name(hs_msg_type),
mbedtls_ssl_get_extension_name(extension_type),
extension_type,
extra_msg0, extra_msg1);
return;
}
extra_msg = extra_msg0 ? extra_msg0 : extra_msg1;
if (extra_msg) {
mbedtls_debug_print_msg(
ssl, level, file, line,
"%s: %s(%u) extension %s.", ssl_tls13_get_hs_msg_name(hs_msg_type),
mbedtls_ssl_get_extension_name(extension_type), extension_type,
extra_msg);
return;
}
mbedtls_debug_print_msg(
ssl, level, file, line,
"%s: %s(%u) extension.", ssl_tls13_get_hs_msg_name(hs_msg_type),
mbedtls_ssl_get_extension_name(extension_type), extension_type);
}
void mbedtls_ssl_print_extensions(const mbedtls_ssl_context *ssl,
int level, const char *file, int line,
int hs_msg_type, uint32_t extensions_mask,
const char *extra)
{
for (unsigned i = 0;
i < sizeof(extension_name_table) / sizeof(extension_name_table[0]);
i++) {
mbedtls_ssl_print_extension(
ssl, level, file, line, hs_msg_type, extension_type_table[i],
extensions_mask & (1 << i) ? "exists" : "does not exist", extra);
}
}
#if defined(MBEDTLS_SSL_PROTO_TLS1_3) && defined(MBEDTLS_SSL_SESSION_TICKETS)
static const char *ticket_flag_name_table[] =
{
[0] = "ALLOW_PSK_RESUMPTION",
[2] = "ALLOW_PSK_EPHEMERAL_RESUMPTION",
[3] = "ALLOW_EARLY_DATA",
};
void mbedtls_ssl_print_ticket_flags(const mbedtls_ssl_context *ssl,
int level, const char *file, int line,
unsigned int flags)
{
size_t i;
mbedtls_debug_print_msg(ssl, level, file, line,
"print ticket_flags (0x%02x)", flags);
flags = flags & MBEDTLS_SSL_TLS1_3_TICKET_FLAGS_MASK;
for (i = 0; i < ARRAY_LENGTH(ticket_flag_name_table); i++) {
if ((flags & (1 << i))) {
mbedtls_debug_print_msg(ssl, level, file, line, "- %s is set.",
ticket_flag_name_table[i]);
}
}
}
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 && MBEDTLS_SSL_SESSION_TICKETS */
#endif /* MBEDTLS_DEBUG_C */
void mbedtls_ssl_optimize_checksum(mbedtls_ssl_context *ssl,
const mbedtls_ssl_ciphersuite_t *ciphersuite_info)
{
((void) ciphersuite_info);
#if defined(PSA_WANT_ALG_SHA_384)
if (ciphersuite_info->mac == MBEDTLS_MD_SHA384) {
ssl->handshake->update_checksum = ssl_update_checksum_sha384;
} else
#endif
#if defined(PSA_WANT_ALG_SHA_256)
if (ciphersuite_info->mac != MBEDTLS_MD_SHA384) {
ssl->handshake->update_checksum = ssl_update_checksum_sha256;
} else
#endif
{
MBEDTLS_SSL_DEBUG_MSG(1, ("should never happen"));
return;
}
}
int mbedtls_ssl_add_hs_hdr_to_checksum(mbedtls_ssl_context *ssl,
unsigned hs_type,
size_t total_hs_len)
{
unsigned char hs_hdr[4];
/* Build HS header for checksum update. */
hs_hdr[0] = MBEDTLS_BYTE_0(hs_type);
hs_hdr[1] = MBEDTLS_BYTE_2(total_hs_len);
hs_hdr[2] = MBEDTLS_BYTE_1(total_hs_len);
hs_hdr[3] = MBEDTLS_BYTE_0(total_hs_len);
return ssl->handshake->update_checksum(ssl, hs_hdr, sizeof(hs_hdr));
}
int mbedtls_ssl_add_hs_msg_to_checksum(mbedtls_ssl_context *ssl,
unsigned hs_type,
unsigned char const *msg,
size_t msg_len)
{
int ret;
ret = mbedtls_ssl_add_hs_hdr_to_checksum(ssl, hs_type, msg_len);
if (ret != 0) {
return ret;
}
return ssl->handshake->update_checksum(ssl, msg, msg_len);
}
int mbedtls_ssl_reset_checksum(mbedtls_ssl_context *ssl)
{
#if defined(PSA_WANT_ALG_SHA_256) || \
defined(PSA_WANT_ALG_SHA_384)
#if defined(MBEDTLS_USE_PSA_CRYPTO)
psa_status_t status;
#else
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
#endif
#else /* SHA-256 or SHA-384 */
((void) ssl);
#endif /* SHA-256 or SHA-384 */
#if defined(PSA_WANT_ALG_SHA_256)
#if defined(MBEDTLS_USE_PSA_CRYPTO)
status = psa_hash_abort(&ssl->handshake->fin_sha256_psa);
if (status != PSA_SUCCESS) {
return mbedtls_md_error_from_psa(status);
}
status = psa_hash_setup(&ssl->handshake->fin_sha256_psa, PSA_ALG_SHA_256);
if (status != PSA_SUCCESS) {
return mbedtls_md_error_from_psa(status);
}
#else
mbedtls_md_free(&ssl->handshake->fin_sha256);
mbedtls_md_init(&ssl->handshake->fin_sha256);
ret = mbedtls_md_setup(&ssl->handshake->fin_sha256,
mbedtls_md_info_from_type(MBEDTLS_MD_SHA256),
0);
if (ret != 0) {
return ret;
}
ret = mbedtls_md_starts(&ssl->handshake->fin_sha256);
if (ret != 0) {
return ret;
}
#endif
#endif
#if defined(PSA_WANT_ALG_SHA_384)
#if defined(MBEDTLS_USE_PSA_CRYPTO)
status = psa_hash_abort(&ssl->handshake->fin_sha384_psa);
if (status != PSA_SUCCESS) {
return mbedtls_md_error_from_psa(status);
}
status = psa_hash_setup(&ssl->handshake->fin_sha384_psa, PSA_ALG_SHA_384);
if (status != PSA_SUCCESS) {
return mbedtls_md_error_from_psa(status);
}
#else
mbedtls_md_free(&ssl->handshake->fin_sha384);
mbedtls_md_init(&ssl->handshake->fin_sha384);
ret = mbedtls_md_setup(&ssl->handshake->fin_sha384,
mbedtls_md_info_from_type(MBEDTLS_MD_SHA384), 0);
if (ret != 0) {
return ret;
}
ret = mbedtls_md_starts(&ssl->handshake->fin_sha384);
if (ret != 0) {
return ret;
}
#endif
#endif
return 0;
}
static int ssl_update_checksum_start(mbedtls_ssl_context *ssl,
const unsigned char *buf, size_t len)
{
#if defined(PSA_WANT_ALG_SHA_256) || \
defined(PSA_WANT_ALG_SHA_384)
#if defined(MBEDTLS_USE_PSA_CRYPTO)
psa_status_t status;
#else
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
#endif
#else /* SHA-256 or SHA-384 */
((void) ssl);
(void) buf;
(void) len;
#endif /* SHA-256 or SHA-384 */
#if defined(PSA_WANT_ALG_SHA_256)
#if defined(MBEDTLS_USE_PSA_CRYPTO)
status = psa_hash_update(&ssl->handshake->fin_sha256_psa, buf, len);
if (status != PSA_SUCCESS) {
return mbedtls_md_error_from_psa(status);
}
#else
ret = mbedtls_md_update(&ssl->handshake->fin_sha256, buf, len);
if (ret != 0) {
return ret;
}
#endif
#endif
#if defined(PSA_WANT_ALG_SHA_384)
#if defined(MBEDTLS_USE_PSA_CRYPTO)
status = psa_hash_update(&ssl->handshake->fin_sha384_psa, buf, len);
if (status != PSA_SUCCESS) {
return mbedtls_md_error_from_psa(status);
}
#else
ret = mbedtls_md_update(&ssl->handshake->fin_sha384, buf, len);
if (ret != 0) {
return ret;
}
#endif
#endif
return 0;
}
#if defined(PSA_WANT_ALG_SHA_256)
static int ssl_update_checksum_sha256(mbedtls_ssl_context *ssl,
const unsigned char *buf, size_t len)
{
#if defined(MBEDTLS_USE_PSA_CRYPTO)
return mbedtls_md_error_from_psa(psa_hash_update(
&ssl->handshake->fin_sha256_psa, buf, len));
#else
return mbedtls_md_update(&ssl->handshake->fin_sha256, buf, len);
#endif
}
#endif
#if defined(PSA_WANT_ALG_SHA_384)
static int ssl_update_checksum_sha384(mbedtls_ssl_context *ssl,
const unsigned char *buf, size_t len)
{
#if defined(MBEDTLS_USE_PSA_CRYPTO)
return mbedtls_md_error_from_psa(psa_hash_update(
&ssl->handshake->fin_sha384_psa, buf, len));
#else
return mbedtls_md_update(&ssl->handshake->fin_sha384, buf, len);
#endif
}
#endif
static void ssl_handshake_params_init(mbedtls_ssl_handshake_params *handshake)
{
memset(handshake, 0, sizeof(mbedtls_ssl_handshake_params));
#if defined(PSA_WANT_ALG_SHA_256)
#if defined(MBEDTLS_USE_PSA_CRYPTO)
handshake->fin_sha256_psa = psa_hash_operation_init();
#else
mbedtls_md_init(&handshake->fin_sha256);
#endif
#endif
#if defined(PSA_WANT_ALG_SHA_384)
#if defined(MBEDTLS_USE_PSA_CRYPTO)
handshake->fin_sha384_psa = psa_hash_operation_init();
#else
mbedtls_md_init(&handshake->fin_sha384);
#endif
#endif
handshake->update_checksum = ssl_update_checksum_start;
#if defined(MBEDTLS_DHM_C)
mbedtls_dhm_init(&handshake->dhm_ctx);
#endif
#if !defined(MBEDTLS_USE_PSA_CRYPTO) && \
defined(MBEDTLS_KEY_EXCHANGE_SOME_ECDH_OR_ECDHE_1_2_ENABLED)
mbedtls_ecdh_init(&handshake->ecdh_ctx);
#endif
#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
#if defined(MBEDTLS_USE_PSA_CRYPTO)
handshake->psa_pake_ctx = psa_pake_operation_init();
handshake->psa_pake_password = MBEDTLS_SVC_KEY_ID_INIT;
#else
mbedtls_ecjpake_init(&handshake->ecjpake_ctx);
#endif /* MBEDTLS_USE_PSA_CRYPTO */
#if defined(MBEDTLS_SSL_CLI_C)
handshake->ecjpake_cache = NULL;