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2022 Zabbix中国峰会
2022 Zabbix中国峰会

3 PSK问题

PSK包含奇数个十六进制数字

Proxy或agent不启动,proxy或agent日志中的消息:

invalid PSK in file "/home/zabbix/zabbix_proxy.psk"

长度超过128字节的PSK identity(共享密钥一致性)字符串传递给GnuTLS

在TLS客户端日志中

gnutls_handshake() failed: -110 The TLS connection was non-properly terminated.

在TLS服务器端日志中。

gnutls_handshake() failed: -90 The SRP username supplied is illegal.

超过32个字节的PSK传递到mbed TLS(PolarSSL)

在任何Zabbix日志中:

ssl_set_psk(): SSL - Bad input parameters to function

Too long PSK value used with OpenSSL 1.1.1

In connecting-side log:

...OpenSSL library (version OpenSSL 1.1.1  11 Sep 2018) initialized
       ...
       ...In zbx_tls_connect(): psk_identity:"PSK 1"
       ...zbx_psk_client_cb() requested PSK identity "PSK 1"
       ...End of zbx_tls_connect():FAIL error:'SSL_connect() set result code to SSL_ERROR_SSL: file ssl\statem\extensions_clnt.c line 801: error:14212044:SSL routines:tls_construct_ctos_early_data:internal error: TLS write fatal alert "internal error"'

In accepting-side log:

...Message from 123.123.123.123 is missing header. Message ignored.

This problem typically arises when upgrading OpenSSL from 1.0.x or 1.1.0 to 1.1.1 and if the PSK value is longer than 512-bit (64-byte PSK, entered as 128 hexadecimal digits).

See also: Value size limits