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Merge pull request #6593 from Mbed-TLS/fix_tls12_sent_sigalgs

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Fix TLS1.2 signature algorithms list entry getting overwritten by length.
This commit is contained in:
Dave Rodgman
2022-11-21 10:09:57 +00:00
committed by GitHub
parent 821d862159 f6e342cae2
commit 9e1836cc16
4 changed files with 45 additions and 10 deletions
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2
library/ssl_tls12_client.c
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@ -2654,7 +2654,7 @@ static int ssl_parse_certificate_request( mbedtls_ssl_context *ssl )
for( size_t i = 0; i < sig_alg_len; i += 2 )
{
MBEDTLS_SSL_DEBUG_MSG( 3,
( "Supported Signature Algorithm found: %d,%d",
( "Supported Signature Algorithm found: %02x %02x",
sig_alg[i], sig_alg[i + 1] ) );
}
#endif

7
library/ssl_tls12_server.c
View File

@ -2531,10 +2531,15 @@ static int ssl_write_certificate_request( mbedtls_ssl_context *ssl )
if( ! mbedtls_ssl_sig_alg_is_supported( ssl, *sig_alg ) )
continue;
MBEDTLS_PUT_UINT16_BE( *sig_alg, p, sa_len );
/* Write elements at offsets starting from 1 (offset 0 is for the
* length). Thus the offset of each element is the length of the
* partial list including that element. */
sa_len += 2;
MBEDTLS_PUT_UINT16_BE( *sig_alg, p, sa_len );
}
/* Fill in list length. */
MBEDTLS_PUT_UINT16_BE( sa_len, p, 0 );
sa_len += 2;
p += sa_len;