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ssl_client.c: Adapt compression methods comment to TLS 1.2 case

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Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron 2022-02-20 10:24:39 +01:00
parent d491c2d779
commit 42c1cbf1de
1 changed files with 5 additions and 1 deletions
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6
library/ssl_client.c
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@ -385,11 +385,15 @@ static int ssl_write_client_hello_body( mbedtls_ssl_context *ssl,
return( ret );
p += output_len;
/* Write legacy_compression_methods
/* Write legacy_compression_methods (TLS 1.3) or
* compression_methods (TLS 1.2)
*
* For every TLS 1.3 ClientHello, this vector MUST contain exactly
* one byte set to zero, which corresponds to the 'null' compression
* method in prior versions of TLS.
*
* For TLS 1.2 ClientHello, for security reasons we do not support
* compression anymore, thus also just the 'null' compression method.
*/
MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
*p++ = 1;