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SSL: logging levels of "unsupported protocol", "version too low".

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Starting with OpenSSL 1.1.0, SSL_R_UNSUPPORTED_PROTOCOL instead of
SSL_R_UNKNOWN_PROTOCOL is reported when a protocol is disabled via
an SSL_OP_NO_* option.

Additionally, SSL_R_VERSION_TOO_LOW is reported when using MinProtocol
or when seclevel checks (as set by @SECLEVEL=n in the cipher string)
rejects a protocol, and this is what happens with SSLv3 and @SECLEVEL=1,
which is the default.

There is also the SSL_R_VERSION_TOO_HIGH error code, but it looks like
it is not possible to trigger it.
This commit is contained in:
Maxim Dounin 2018-07-16 17:47:18 +03:00
parent 85b44b46fb
commit b1734fd800
1 changed files with 4 additions and 0 deletions
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4
src/event/ngx_event_openssl.c
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@ -2079,6 +2079,7 @@ ngx_ssl_connection_error(ngx_connection_t *c, int sslerr, ngx_err_t err,
|| n == SSL_R_UNEXPECTED_RECORD /* 245 */
|| n == SSL_R_UNKNOWN_ALERT_TYPE /* 246 */
|| n == SSL_R_UNKNOWN_PROTOCOL /* 252 */
|| n == SSL_R_UNSUPPORTED_PROTOCOL /* 258 */
|| n == SSL_R_WRONG_VERSION_NUMBER /* 267 */
|| n == SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC /* 281 */
#ifdef SSL_R_RENEGOTIATE_EXT_TOO_LONG
@ -2094,6 +2095,9 @@ ngx_ssl_connection_error(ngx_connection_t *c, int sslerr, ngx_err_t err,
#endif
#ifdef SSL_R_INAPPROPRIATE_FALLBACK
|| n == SSL_R_INAPPROPRIATE_FALLBACK /* 373 */
#endif
#ifdef SSL_R_VERSION_TOO_LOW
|| n == SSL_R_VERSION_TOO_LOW /* 396 */
#endif
|| n == 1000 /* SSL_R_SSLV3_ALERT_CLOSE_NOTIFY */
#ifdef SSL_R_SSLV3_ALERT_UNEXPECTED_MESSAGE