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tls13: cli: Add mbedtls_ssl_write_early_data() API

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Signed-off-by: Xiaokang Qian <xiaokang.qian@arm.com>
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Xiaokang Qian 2023-11-30 09:58:08 +00:00 committed by Ronald Cron
parent 2261ab298f
commit b62732e1d6
1 changed files with 75 additions and 0 deletions
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75
library/ssl_msg.c
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@ -6058,6 +6058,81 @@ int mbedtls_ssl_write(mbedtls_ssl_context *ssl, const unsigned char *buf, size_t
return ret; return ret;
} }
#if defined(MBEDTLS_SSL_EARLY_DATA) && defined(MBEDTLS_SSL_CLI_C)
int mbedtls_ssl_write_early_data(mbedtls_ssl_context *ssl,
const unsigned char *buf, size_t len)
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
const struct mbedtls_ssl_config *conf;
int written_data_len = 0;
MBEDTLS_SSL_DEBUG_MSG(2, ("=> write early_data"));
if (ssl == NULL || (conf = ssl->conf) == NULL) {
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
}
if ((!mbedtls_ssl_conf_is_tls13_enabled(conf)) ||
(conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM) ||
(conf->early_data_enabled != MBEDTLS_SSL_EARLY_DATA_ENABLED)) {
return MBEDTLS_ERR_SSL_CANNOT_WRITE_EARLY_DATA;
}
if (ssl->tls_version != MBEDTLS_SSL_VERSION_TLS1_3) {
return MBEDTLS_ERR_SSL_CANNOT_WRITE_EARLY_DATA;
}
/*
* If we are at the beginning of the handshake, advance the handshake just
* enough to be able to send early data if possible. That way, we can
* guarantee that when starting the handshake with this function we will
* send at least one record of early data.
* Otherwise, resume the handshake and if the handshake sequence stops
* waiting for some message from the server, send early data if we can.
*/
if ((ssl->early_data_status == MBEDTLS_SSL_EARLY_DATA_STATUS_UNKNOWN) ||
(ssl->early_data_status == MBEDTLS_SSL_EARLY_DATA_STATUS_SENT)) {
while ((ssl->early_data_status == MBEDTLS_SSL_EARLY_DATA_STATUS_UNKNOWN) ||
(ssl->early_data_status == MBEDTLS_SSL_EARLY_DATA_STATUS_SENT)) {
ret = mbedtls_ssl_handshake_step(ssl);
if (ret != 0) {
MBEDTLS_SSL_DEBUG_RET(1, "mbedtls_ssl_handshake_step", ret);
return ret;
}
ret = mbedtls_ssl_flush_output(ssl);
if (ret != 0) {
MBEDTLS_SSL_DEBUG_RET(1, "mbedtls_ssl_flush_output", ret);
return ret;
}
}
} else {
if ((ssl->early_data_status != MBEDTLS_SSL_EARLY_DATA_STATUS_CAN_WRITE) &&
(ssl->early_data_status != MBEDTLS_SSL_EARLY_DATA_STATUS_ACCEPTED)) {
return MBEDTLS_ERR_SSL_CANNOT_WRITE_EARLY_DATA;
}
ret = mbedtls_ssl_handshake(ssl);
if ((ret != 0) && (ret != MBEDTLS_ERR_SSL_WANT_READ)) {
MBEDTLS_SSL_DEBUG_RET(1, "mbedtls_ssl_handshake", ret);
return ret;
}
}
if ((ssl->early_data_status != MBEDTLS_SSL_EARLY_DATA_STATUS_CAN_WRITE) &&
(ssl->early_data_status != MBEDTLS_SSL_EARLY_DATA_STATUS_ACCEPTED)) {
return MBEDTLS_ERR_SSL_CANNOT_WRITE_EARLY_DATA;
}
written_data_len = ssl_write_real(ssl, buf, len);
MBEDTLS_SSL_DEBUG_MSG(2, ("<= write early_data, len=%d", written_data_len));
return written_data_len;
}
#endif /* MBEDTLS_SSL_EARLY_DATA && MBEDTLS_SSL_CLI_C */
/* /*
* Notify the peer that the connection is being closed * Notify the peer that the connection is being closed
*/ */