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Add function to retrieve the tls_prf type

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Add `tls_prf_get_type()` static function that returns the
`mbedtls_tls_prf_types` according to the used `tls_prf` function.
This commit is contained in:
Ron Eldor 2019-05-14 20:19:13 +03:00
parent 824ad7b351
commit cf28009839
1 changed files with 38 additions and 17 deletions
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55
library/ssl_tls.c
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@ -751,6 +751,43 @@ static int ssl_use_opaque_psk( mbedtls_ssl_context const *ssl )
#endif /* MBEDTLS_USE_PSA_CRYPTO &&
MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
static mbedtls_tls_prf_types tls_prf_get_type( mbedtls_ssl_tls_prf_cb *tls_prf )
{
#if defined(MBEDTLS_SSL_PROTO_SSL3)
if( tls_prf == ssl3_prf )
{
returnn( MBEDTLS_SSL_TLS_PRF_SSL3 );
}
else
#endif
#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1)
if( tls_prf == tls1_prf )
{
return( MBEDTLS_SSL_TLS_PRF_TLS1 );
}
else
#endif
#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
#if defined(MBEDTLS_SHA512_C)
if( tls_prf == tls_prf_sha384 )
{
return( MBEDTLS_SSL_TLS_PRF_SHA384 );
}
else
#endif
#if defined(MBEDTLS_SHA256_C)
if( tls_prf == tls_prf_sha256 )
{
return( MBEDTLS_SSL_TLS_PRF_SHA256 );
}
else
#endif
#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
return( MBEDTLS_SSL_TLS_PRF_NONE );
}
#endif /* MBEDTLS_SSL_EXPORT_KEYS */
int mbedtls_ssl_tls_prf( const mbedtls_tls_prf_types prf,
const unsigned char *secret, size_t slen,
const char *label,
@ -811,10 +848,6 @@ int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl )
* "The master secret is always exactly 48 bytes in length." */
size_t const master_secret_len = 48;
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
mbedtls_tls_prf_types tls_prf_type = MBEDTLS_SSL_TLS_PRF_NONE;
#endif
#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
unsigned char session_hash[48];
#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */
@ -856,9 +889,6 @@ int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl )
handshake->tls_prf = ssl3_prf;
handshake->calc_verify = ssl_calc_verify_ssl;
handshake->calc_finished = ssl_calc_finished_ssl;
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
tls_prf_type = MBEDTLS_SSL_TLS_PRF_SSL3;
#endif
}
else
#endif
@ -868,9 +898,6 @@ int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl )
handshake->tls_prf = tls1_prf;
handshake->calc_verify = ssl_calc_verify_tls;
handshake->calc_finished = ssl_calc_finished_tls;
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
tls_prf_type = MBEDTLS_SSL_TLS_PRF_TLS1;
#endif
}
else
#endif
@ -882,9 +909,6 @@ int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl )
handshake->tls_prf = tls_prf_sha384;
handshake->calc_verify = ssl_calc_verify_tls_sha384;
handshake->calc_finished = ssl_calc_finished_tls_sha384;
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
tls_prf_type = MBEDTLS_SSL_TLS_PRF_SHA384;
#endif
}
else
#endif
@ -894,9 +918,6 @@ int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl )
handshake->tls_prf = tls_prf_sha256;
handshake->calc_verify = ssl_calc_verify_tls_sha256;
handshake->calc_finished = ssl_calc_finished_tls_sha256;
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
tls_prf_type = MBEDTLS_SSL_TLS_PRF_SHA256;
#endif
}
else
#endif
@ -1327,7 +1348,7 @@ int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl )
iv_copy_len,
handshake->randbytes + 32,
handshake->randbytes,
tls_prf_type);
tls_prf_get_type( handshake->tls_prf ) );
}
#endif