RNGD(8) System Manager's Manual RNGD(8) (NAME) rngd - (SYNOPSIS) rngd [-b, --background] [-f, --foreground] [-d, --debug] [-l, --list] [-x, --exclude] [-n, --include] [-O, --option] [-i, --ignorefail] [-o, --random-device=file] [-p, --pid-file=file] [-r, --rng-device=file] [-s, --random-step=nnn] [-t, --test] [-W, --fill-watermark=nnn] [-R, --force-reseed=nnn] [-u, --use-slow-sources] [-D, --drop- privileges=user:group] [-q, --quiet] [-?, --help] [-v, --version] (DESCRIPTION) . -f --foreground (fork) rngd . . -b --background . -r --rng-device /dev/hwrng . -o --random-device /dev/random . API ioctl /dev/random . (OPTIONS) -b, --background (). -f, --foreground ( fork). -d, --debug . -l, --list () . . -x, --exclude ( ) --list. -n, --include ( ) --list. -O, --option --option [index|shortname]:key:value << >> . -O [|] . -p file, --pid-file=file (PID) (: /var/run/rngd.pid). -i, --ignorefail FIPS. -o file, --random-device=file (: /dev/random). -r file, --rng-device=file (: /dev/hwrng). -s nnn, --random-step=nnn (: ). -t, --test . ( -f ) rngd . -e nnn, --entropy-count=nnn <= e <= (: ). -W n, --fill-watermark=nnn random-device fill-watermark . . rngd . . fill-watermark ( ) . . -R n, --force-reseed=nnn (non-blocking) . --force-reseed (: ). -u, --use-slow-sources nist jitter pkcs11 . . rngd . -D, --drop-privileges=user:group . . . . -q, --quiet . -?, --help . -v, --version . (ENTROPY SOURCES) rngd . ( ) . rngd rngd . rngd : (Hardware RNG - hwrng) Hardware RNG /dev/hwrng . (TPM - tpm) TPM . TPM /dev/hwrng hwrng . RDRAND/RDSEED (rdrand) RDRAND RDSEED ( x86). (Options) use_aes - rdrand cprng rdrand (: ). DARN (darn) DARN ( ppc64). (Options) use_aes - POWER darn cprng aes (: ). RNDR (rndr) RNDR ( aarch64). (Options) use_aes - ARM rndr cprng aes (: ). (NIST Entropy Beacon - nist) NIST. . (Qrypt Entropy Beacon - qrypt) Qrypt. TLS (man-in-the-middle) . (Options) tokenfile - Qrypt . delay - ( ) . . (JITTER - jitter) . (Options) thread_count - (threads) jitter . buffer_size - () . refill_thresh - (watermark) . retry_count - . jitterentropy (: ). retry_delay - retry_count . - (: -). force_soft_timer - . . (PKCS11 - pkcs11) opensc openssl . pkcs11 . opensc / opensc-pkcs11 opensc-pkcs11.so . (Options) engine_path - DSO pkcs11. chunk_size - pkcs11 . (RTLSDR - rtlsdr) rtl USB . (Options) devid - . freq_min - . freq_max - . sample_min - . sample_max - . (Named pipe - namedpipe) ( FIFO). RNG . rngd . (Options) path - (). timeout - ( ) rngd FIPS (: ). (AUTHORS) Philipp Rumpf Jeff Garzik - jgarzik@pobox.com Matt Sottek Brad Hill Neil Horman - nhorman@tuxdriver.com rng-tools 6.17 March 2001 RNGD(8)