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TLS testing: Allow hostapd to be used as a TLS testing tool

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The internal TLS server implementation and RADIUS server implementation
in hostapd can be configured to allow EAP clients to be tested to
perform TLS validation steps correctly. This functionality is not
included in the default build; CONFIG_TESTING_OPTIONS=y in
hostapd/.config can be used to enable this.

When enabled, the RADIUS server will configure special TLS test modes
based on the received User-Name attribute value in this format:
<user>@test-tls-<id>.<rest-of-realm>. For example,
anonymous@test-tls-1.example.com. When this special format is used, TLS
test modes are enabled. For other cases, the RADIUS server works
normally.

The following TLS test cases are enabled in this commit:
1 - break verify_data in the server Finished message
2 - break signed_params hash in ServerKeyExchange
3 - break Signature in ServerKeyExchange

Correctly behaving TLS client must abort connection if any of these
failures is detected and as such, shall not transmit continue the
session.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2014-03-02 00:43:59 +02:00
parent 994afe3390
commit 390b92913a
12 changed files with 150 additions and 0 deletions
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6
src/crypto/tls.h
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@ -541,4 +541,10 @@ void tls_connection_set_log_cb(struct tls_connection *conn,
void (*log_cb)(void *ctx, const char *msg),
void *ctx);
#define TLS_BREAK_VERIFY_DATA BIT(0)
#define TLS_BREAK_SRV_KEY_X_HASH BIT(1)
#define TLS_BREAK_SRV_KEY_X_SIGNATURE BIT(2)
void tls_connection_set_test_flags(struct tls_connection *conn, u32 flags);
#endif /* TLS_H */

11
src/crypto/tls_internal.c
View file

@ -111,6 +111,17 @@ struct tls_connection * tls_connection_init(void *tls_ctx)
}
#ifdef CONFIG_TESTING_OPTIONS
#ifdef CONFIG_TLS_INTERNAL_SERVER
void tls_connection_set_test_flags(struct tls_connection *conn, u32 flags)
{
if (conn->server)
tlsv1_server_set_test_flags(conn->server, flags);
}
#endif /* CONFIG_TLS_INTERNAL_SERVER */
#endif /* CONFIG_TESTING_OPTIONS */
void tls_connection_set_log_cb(struct tls_connection *conn,
void (*log_cb)(void *ctx, const char *msg),
void *ctx)