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Style + fix bound check in write_use_srt_ext

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Signed-off-by: Johan Pascal <johan.pascal@belledonne-communications.com>
This commit is contained in:
Johan Pascal
2020-09-22 10:39:53 +02:00
parent 9bc97ca19d
commit d576fdb1d6
4 changed files with 26 additions and 23 deletions
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9
library/ssl_srv.c
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@ -2063,6 +2063,7 @@ read_record_header:
#if defined(MBEDTLS_SSL_DTLS_SRTP)
case MBEDTLS_TLS_EXT_USE_SRTP:
MBEDTLS_SSL_DEBUG_MSG( 3, ( "found use_srtp extension" ) );
ret = ssl_parse_use_srtp_ext( ssl, ext + 4, ext_size );
if ( ret != 0 )
return( ret );
@ -2645,8 +2646,7 @@ static void ssl_write_use_srtp_ext( mbedtls_ssl_context *ssl,
MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding use_srtp extension" ) );
if( ssl->conf->dtls_srtp_mki_support == MBEDTLS_SSL_DTLS_SRTP_MKI_SUPPORTED &&
ssl->dtls_srtp_info.mki_len != 0 )
if( ssl->conf->dtls_srtp_mki_support == MBEDTLS_SSL_DTLS_SRTP_MKI_SUPPORTED )
{
mki_len = ssl->dtls_srtp_info.mki_len;
}
@ -2659,7 +2659,7 @@ static void ssl_write_use_srtp_ext( mbedtls_ssl_context *ssl,
* - 1 byte for the mki length
* + the actual mki length
* Check we have enough room in the output buffer */
if( end < buf + mki_len + 9 )
if( (size_t)( end - buf ) < mki_len + 9 )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
return;
@ -2679,7 +2679,8 @@ static void ssl_write_use_srtp_ext( mbedtls_ssl_context *ssl,
/* protection profile length: 2 */
buf[4] = 0x00;
buf[5] = 0x02;
profile_value = mbedtls_ssl_get_srtp_profile_iana_value( ssl->dtls_srtp_info.chosen_dtls_srtp_profile );
profile_value = mbedtls_ssl_get_srtp_profile_iana_value(
ssl->dtls_srtp_info.chosen_dtls_srtp_profile );
if( profile_value != 0xFFFF )
{
buf[6] = (unsigned char)( ( profile_value >> 8 ) & 0xFF );