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Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron 2022-03-30 09:57:11 +02:00
parent 8ecd9937a9
commit da41b38c42
2 changed files with 25 additions and 21 deletions
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20
library/ssl_tls13_client.c
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@ -714,6 +714,18 @@ int mbedtls_ssl_tls13_write_client_hello_exts( mbedtls_ssl_context *ssl,
/*
* Functions for parsing and processing Server Hello
*/
/**
* \brief Detect if the ServerHello contains a supported_versions extension
* or not.
*
* \param[in] ssl SSL context
* \param[in] buf Buffer containing the ServerHello message
* \param[in] end End of the buffer containing the ServerHello message
*
* \return 0 if the ServerHello does not contain a supported_versions extension
* \return 1 if the ServerHello contains a supported_versions extension
* \return A negative value if an error occurred while parsing the ServerHello.
*/
static int ssl_tls13_is_supported_versions_ext_present(
mbedtls_ssl_context *ssl,
const unsigned char *buf,
@ -726,10 +738,10 @@ static int ssl_tls13_is_supported_versions_ext_present(
/*
* Check there is enough data to access the legacy_session_id_echo vector
* length.
* - legacy_version, 2 bytes
* - random MBEDTLS_SERVER_HELLO_RANDOM_LEN bytes
* - legacy_session_id_echo 1 byte
* length:
* - legacy_version 2 bytes
* - random MBEDTLS_SERVER_HELLO_RANDOM_LEN bytes
* - legacy_session_id_echo length 1 byte
*/
MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, MBEDTLS_SERVER_HELLO_RANDOM_LEN + 3 );
p += MBEDTLS_SERVER_HELLO_RANDOM_LEN + 2;