| RAND_egd.3 (206048) | RAND_egd.3 (215698) |
|---|---|
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| 132.TH RAND_egd 3 "2010-03-24" "0.9.8n" "OpenSSL" | 127.TH RAND_egd 3 "2010-11-16" "0.9.8p" "OpenSSL" 128.\" For nroff, turn off justification. Always turn off hyphenation; it makes 129.\" way too many mistakes in technical documents. 130.if n .ad l 131.nh |
| 133.SH "NAME" 134RAND_egd \- query entropy gathering daemon 135.SH "SYNOPSIS" 136.IX Header "SYNOPSIS" 137.Vb 1 138\& #include <openssl/rand.h> | 132.SH "NAME" 133RAND_egd \- query entropy gathering daemon 134.SH "SYNOPSIS" 135.IX Header "SYNOPSIS" 136.Vb 1 137\& #include <openssl/rand.h> |
| 139.Ve 140.PP 141.Vb 2 | 138\& |
| 142\& int RAND_egd(const char *path); 143\& int RAND_egd_bytes(const char *path, int bytes); | 139\& int RAND_egd(const char *path); 140\& int RAND_egd_bytes(const char *path, int bytes); |
| 144.Ve 145.PP 146.Vb 1 | 141\& |
| 147\& int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes); 148.Ve 149.SH "DESCRIPTION" 150.IX Header "DESCRIPTION" 151\&\fIRAND_egd()\fR queries the entropy gathering daemon \s-1EGD\s0 on socket \fBpath\fR. 152It queries 255 bytes and uses \fIRAND_add\fR\|(3) to seed the 153OpenSSL built-in \s-1PRNG\s0. RAND_egd(path) is a wrapper for 154RAND_egd_bytes(path, 255); --- 18 unchanged lines hidden (view full) --- 173a socket interface through which entropy can be gathered in chunks up to 174255 bytes. Several chunks can be queried during one connection. 175.PP 176\&\s-1EGD\s0 is available from http://www.lothar.com/tech/crypto/ (\f(CW\*(C`perl 177Makefile.PL; make; make install\*(C'\fR to install). It is run as \fBegd\fR 178\&\fIpath\fR, where \fIpath\fR is an absolute path designating a socket. When 179\&\fIRAND_egd()\fR is called with that path as an argument, it tries to read 180random bytes that \s-1EGD\s0 has collected. \fIRAND_egd()\fR retrieves entropy from the | 142\& int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes); 143.Ve 144.SH "DESCRIPTION" 145.IX Header "DESCRIPTION" 146\&\fIRAND_egd()\fR queries the entropy gathering daemon \s-1EGD\s0 on socket \fBpath\fR. 147It queries 255 bytes and uses \fIRAND_add\fR\|(3) to seed the 148OpenSSL built-in \s-1PRNG\s0. RAND_egd(path) is a wrapper for 149RAND_egd_bytes(path, 255); --- 18 unchanged lines hidden (view full) --- 168a socket interface through which entropy can be gathered in chunks up to 169255 bytes. Several chunks can be queried during one connection. 170.PP 171\&\s-1EGD\s0 is available from http://www.lothar.com/tech/crypto/ (\f(CW\*(C`perl 172Makefile.PL; make; make install\*(C'\fR to install). It is run as \fBegd\fR 173\&\fIpath\fR, where \fIpath\fR is an absolute path designating a socket. When 174\&\fIRAND_egd()\fR is called with that path as an argument, it tries to read 175random bytes that \s-1EGD\s0 has collected. \fIRAND_egd()\fR retrieves entropy from the |
| 181daemon using the daemon's \*(L"non\-blocking read\*(R" command which shall | 176daemon using the daemon's \*(L"non-blocking read\*(R" command which shall |
| 182be answered immediately by the daemon without waiting for additional 183entropy to be collected. The write and read socket operations in the 184communication are blocking. 185.PP 186Alternatively, the EGD-interface compatible daemon \s-1PRNGD\s0 can be used. It is 187available from 188http://prngd.sourceforge.net/ . 189\&\s-1PRNGD\s0 does employ an internal \s-1PRNG\s0 itself and can therefore never run --- 26 unchanged lines hidden --- | 177be answered immediately by the daemon without waiting for additional 178entropy to be collected. The write and read socket operations in the 179communication are blocking. 180.PP 181Alternatively, the EGD-interface compatible daemon \s-1PRNGD\s0 can be used. It is 182available from 183http://prngd.sourceforge.net/ . 184\&\s-1PRNGD\s0 does employ an internal \s-1PRNG\s0 itself and can therefore never run --- 26 unchanged lines hidden --- |