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ngx_ssl_dhparam and dh1024_p

Jeffrey Walton
December 08, 2013 08:56PM
Hi All,

ngx_event_openssl.c hs the following around line 535:

ngx_ssl_dhparam(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *file)
{
...
/*
* -----BEGIN DH PARAMETERS-----
* MIGHAoGBALu8LcrYRnSQfEP89YDpz9vZWKP1aLQtSwju1OsPs1BMbAMCducQgAxc
* y7qokiYUxb7spWWl/fHSh6K8BJvmd4Bg6RqSp1fjBI9osHb302zI8pul34HcLKcl
* 7OZicMyaUDXYzs7vnqAnSmOrHlj6/UmI0PZdFGdX2gcd8EXP4WubAgEC
* -----END DH PARAMETERS-----
*/

static unsigned char dh1024_p[] = {
0xBB, 0xBC, 0x2D, 0xCA, 0xD8, 0x46, 0x74, 0x90, 0x7C, 0x43, 0xFC, 0xF5,
0x80, 0xE9, 0xCF, 0xDB, 0xD9, 0x58, 0xA3, 0xF5, 0x68, 0xB4, 0x2D, 0x4B,
0x08, 0xEE, 0xD4, 0xEB, 0x0F, 0xB3, 0x50, 0x4C, 0x6C, 0x03, 0x02, 0x76,
0xE7, 0x10, 0x80, 0x0C, 0x5C, 0xCB, 0xBA, 0xA8, 0x92, 0x26, 0x14, 0xC5,
0xBE, 0xEC, 0xA5, 0x65, 0xA5, 0xFD, 0xF1, 0xD2, 0x87, 0xA2, 0xBC, 0x04,
0x9B, 0xE6, 0x77, 0x80, 0x60, 0xE9, 0x1A, 0x92, 0xA7, 0x57, 0xE3, 0x04,
0x8F, 0x68, 0xB0, 0x76, 0xF7, 0xD3, 0x6C, 0xC8, 0xF2, 0x9B, 0xA5, 0xDF,
0x81, 0xDC, 0x2C, 0xA7, 0x25, 0xEC, 0xE6, 0x62, 0x70, 0xCC, 0x9A, 0x50,
0x35, 0xD8, 0xCE, 0xCE, 0xEF, 0x9E, 0xA0, 0x27, 0x4A, 0x63, 0xAB, 0x1E,
0x58, 0xFA, 0xFD, 0x49, 0x88, 0xD0, 0xF6, 0x5D, 0x14, 0x67, 0x57, 0xDA,
0x07, 0x1D, 0xF0, 0x45, 0xCF, 0xE1, 0x6B, 0x9B
};
...

Searching on the web for the strings ("MIGHAoGBALu8Lcr", "0xBB, 0xBC,
0x2D, 0xCA, 0xD8, 0x46, 0x74, 0x90" and "bbbc2dcad8467490") returned
hits for nginx (but no hits in a standard somewhere).

Would anyone happen to know where that prime and generator came from?

Does anyone know the subgroup order (or what is the q)? Is q at least
160-bits (or 2k, where k is 80-bits for the security level offered in
the 1024-bit DH prime)?

Thanks in advance.

Jeff

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Subject Author Posted

ngx_ssl_dhparam and dh1024_p

Jeffrey Walton December 08, 2013 08:56PM

Re: ngx_ssl_dhparam and dh1024_p

Igor Sysoev December 09, 2013 09:54AM



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