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ssl_tls13_client.c: versions ext writing : Fix available space check

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Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron 2022-03-30 17:20:47 +02:00
parent 37bdaab64f
commit a77fc2756e
1 changed files with 2 additions and 3 deletions
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5
library/ssl_tls13_client.c
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@ -60,10 +60,9 @@ static int ssl_tls13_write_supported_versions_ext( mbedtls_ssl_context *ssl,
* - extension_type (2 bytes) * - extension_type (2 bytes)
* - extension_data_length (2 bytes) * - extension_data_length (2 bytes)
* - versions_length (1 byte ) * - versions_length (1 byte )
* - versions (2 to 4 bytes) * - versions (2 or 4 bytes)
*/ */
MBEDTLS_SSL_CHK_BUF_PTR( p, end, 5 + versions_len );
MBEDTLS_SSL_CHK_BUF_PTR( p, end, 9 );
MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SUPPORTED_VERSIONS, p, 0 ); MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SUPPORTED_VERSIONS, p, 0 );
MBEDTLS_PUT_UINT16_BE( versions_len + 1, p, 2 ); MBEDTLS_PUT_UINT16_BE( versions_len + 1, p, 2 );