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Add a test-rng program so we can pipe to dieharder.

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This commit is contained in:
Nick Mathewson 2019-02-06 09:36:12 -05:00
parent 490e187056
commit acbde10fce
3 changed files with 70 additions and 2 deletions
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2
.gitignore vendored
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@ -248,6 +248,7 @@ uptime-*.json
/src/test/test-memwipe
/src/test/test-ntor-cl
/src/test/test-hs-ntor-cl
/src/test/test-rng
/src/test/test-switch-id
/src/test/test-timers
/src/test/test_workqueue
@ -258,6 +259,7 @@ uptime-*.json
/src/test/test-ntor-cl.exe
/src/test/test-hs-ntor-cl.exe
/src/test/test-memwipe.exe
/src/test/test-rng.exe
/src/test/test-switch-id.exe
/src/test/test-timers.exe
/src/test/test_workqueue.exe

11
src/test/include.am
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@ -68,7 +68,8 @@ noinst_PROGRAMS+= \
src/test/test-process \
src/test/test_workqueue \
src/test/test-switch-id \
src/test/test-timers
src/test/test-timers \
src/test/test-rng
endif
src_test_AM_CPPFLAGS = -DSHARE_DATADIR="\"$(datadir)\"" \
@ -258,7 +259,13 @@ src_test_test_LDADD = \
src_test_test_slow_CPPFLAGS = $(src_test_test_CPPFLAGS)
src_test_test_slow_CFLAGS = $(src_test_test_CFLAGS)
src_test_test_slow_LDADD = $(src_test_test_LDADD)
src_test_test_slow_LDFLAGS = $(src_test_test_LDFLAGS)
src_test_test_slow_LDFLAGS =@TOR_LDFLAGS_openssl@
src_test_test_rng_CPPFLAGS = $(src_test_test_CPPFLAGS)
src_test_test_rng_CFLAGS = $(src_test_test_CFLAGS)
src_test_test_rng_SOURCES = src/test/test_rng.c
src_test_test_rng_LDFLAGS = $(src_test_test_LDFLAGS)
src_test_test_rng_LDADD = $(src_test_test_LDADD)
src_test_test_memwipe_CPPFLAGS = $(src_test_test_CPPFLAGS)
# Don't use bugtrap cflags here: memwipe tests require memory violations.

59
src/test/test_rng.c Normal file
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@ -0,0 +1,59 @@
/* Copyright (c) 2016-2019, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/*
* Example usage:
*
* ./src/test/test-rng --emit | dieharder -g 200 -a
*
* Remember, dieharder can tell you that your RNG is completely broken, but if
* your RNG is not _completely_ broken, dieharder cannot tell you whether your
* RNG is actually secure.
*/
#include "orconfig.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "lib/crypt_ops/crypto_rand.h"
int
main(int argc, char **argv)
{
uint8_t buf[0x123];
if (argc != 2 || strcmp(argv[1], "--emit")) {
fprintf(stderr, "If you want me to fill stdout with a bunch of random "
"bytes, you need to say --emit.\n");
return 1;
}
if (crypto_seed_rng() < 0) {
fprintf(stderr, "Can't seed RNG.\n");
return 1;
}
#if 0
while (1) {
crypto_rand(buf, sizeof(buf));
if (write(1 /*stdout*/, buf, sizeof(buf)) != sizeof(buf)) {
fprintf(stderr, "write() failed: %s\n", strerror(errno));
return 1;
}
}
#endif
crypto_fast_rng_t *rng = crypto_fast_rng_new();
while (1) {
crypto_fast_rng_getbytes(rng, buf, sizeof(buf));
if (write(1 /*stdout*/, buf, sizeof(buf)) != sizeof(buf)) {
fprintf(stderr, "write() failed: %s\n", strerror(errno));
return 1;
}
}
}