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@@ -302,8 +302,23 @@ static void _unregister_all(void)
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#endif
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} /* _cleanup() */
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+static unsigned long my_test_rng_read;
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+
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+static unsigned long my_test_rng(unsigned char *buf, unsigned long len,
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+ void (*callback)(void))
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+{
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+ unsigned long n;
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+ LTC_UNUSED_PARAM(callback);
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+ for (n = 0; n < len; ++n) {
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+ buf[n] = 4;
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+ }
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+ my_test_rng_read += n;
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+ return n;
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+}
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+
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void reg_algs(void)
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{
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+ unsigned long before;
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int err;
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atexit(_unregister_all);
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@@ -441,6 +456,21 @@ register_prng(&rc4_desc);
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register_prng(&sober128_desc);
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#endif
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+ ltc_rng = my_test_rng;
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+
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+ before = my_test_rng_read;
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+ if ((err = rng_make_prng(128, find_prng("yarrow"), &yarrow_prng, NULL)) != CRYPT_OK) {
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+ fprintf(stderr, "rng_make_prng with 'my_test_rng' failed: %s\n", error_to_string(err));
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+ exit(EXIT_FAILURE);
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+ }
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+
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+ if (before == my_test_rng_read) {
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+ fprintf(stderr, "somehow there was no read from the ltc_rng! %lu == %lu\n", before, my_test_rng_read);
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+ exit(EXIT_FAILURE);
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+ }
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+
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+ ltc_rng = NULL;
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+
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if ((err = rng_make_prng(128, find_prng("yarrow"), &yarrow_prng, NULL)) != CRYPT_OK) {
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fprintf(stderr, "rng_make_prng failed: %s\n", error_to_string(err));
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exit(EXIT_FAILURE);
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