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BoringSSL: Map OpenSSL SUITEB192 cipher into appropriate parameters

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BoringSSL removed the special OpenSSL cipher suite value "SUITEB192", so
need to map that to the explicit ciphersuite
(ECDHE-ECDSA-AES256-GCM-SHA384), curve (P-384), and sigalg
(SSL_SIGN_ECDSA_SECP384R1_SHA384) to allow 192-bit level Suite B with
ECDSA to be used.

This commit takes care of the ciphersuite and curve configuration.
sigalg change is in a separate commit since it requires a newer
BoringSSL API function that may not be available in all builds.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This commit is contained in:
Jouni Malinen 2018-02-16 17:14:16 +02:00 committed by Jouni Malinen
parent 3552502344
commit 7a47f34b1a
1 changed files with 26 additions and 3 deletions
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29
src/crypto/tls_openssl.c
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@ -2533,6 +2533,18 @@ static int tls_set_conn_flags(struct tls_connection *conn, unsigned int flags,
return -1;
}
#endif /* OPENSSL_VERSION_NUMBER */
#ifdef OPENSSL_IS_BORINGSSL
if (openssl_ciphers && os_strcmp(openssl_ciphers, "SUITEB192") == 0) {
int nid[1] = { NID_secp384r1 };
if (SSL_set1_curves(ssl, nid, 1) != 1) {
wpa_printf(MSG_INFO,
"OpenSSL: Failed to set Suite B curves");
return -1;
}
}
#endif /* OPENSSL_IS_BORINGSSL */
#endif /* CONFIG_SUITEB */
return 0;
@ -4258,6 +4270,7 @@ int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
const char *cert_id = params->cert_id;
const char *ca_cert_id = params->ca_cert_id;
const char *engine_id = params->engine ? params->engine_id : NULL;
const char *ciphers;
if (conn == NULL)
return -1;
@ -4377,11 +4390,21 @@ int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
return -1;
}
if (params->openssl_ciphers &&
SSL_set_cipher_list(conn->ssl, params->openssl_ciphers) != 1) {
ciphers = params->openssl_ciphers;
#ifdef CONFIG_SUITEB
#ifdef OPENSSL_IS_BORINGSSL
if (ciphers && os_strcmp(ciphers, "SUITEB192") == 0) {
/* BoringSSL removed support for SUITEB192, so need to handle
* this with hardcoded ciphersuite and additional checks for
* other parameters. */
ciphers = "ECDHE-ECDSA-AES256-GCM-SHA384";
}
#endif /* OPENSSL_IS_BORINGSSL */
#endif /* CONFIG_SUITEB */
if (ciphers && SSL_set_cipher_list(conn->ssl, ciphers) != 1) {
wpa_printf(MSG_INFO,
"OpenSSL: Failed to set cipher string '%s'",
params->openssl_ciphers);
ciphers);
return -1;
}