commit c3953348794f1689d3e2fe595f5d0045cb6c1a11 Author: Nick Mathewson nickm@torproject.org Date: Tue May 3 13:47:33 2016 -0400

Mark some unreachable lines in crypto.c --- src/common/crypto.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/common/crypto.c b/src/common/crypto.c index 56920c5..37477c5 100644 --- a/src/common/crypto.c +++ b/src/common/crypto.c @@ -2639,6 +2639,7 @@ crypto_strongest_rand_syscall(uint8_t *out, size_t out_len) } while (ret == -1 && ((errno == EINTR) ||(errno == EAGAIN)));

if (PREDICT_UNLIKELY(ret == -1)) { + /* LCOV_EXCL_START we can't actually make the syscall fail in testing. */ tor_assert(errno != EAGAIN); tor_assert(errno != EINTR);

@@ -2646,6 +2647,7 @@ crypto_strongest_rand_syscall(uint8_t *out, size_t out_len) log_warn(LD_CRYPTO, "Can't get entropy from getrandom()."); getrandom_works = 0; /* Don't bother trying again. */ return -1; + /* LCOV_EXCL_STOP */ }

tor_assert(ret == (long)out_len); @@ -2699,10 +2701,13 @@ crypto_strongest_rand_fallback(uint8_t *out, size_t out_len) n = read_all(fd, (char*)out, out_len, 0); close(fd); if (n != out_len) { + /* LCOV_EXCL_START + * We can't make /dev/foorandom actually fail. */ log_warn(LD_CRYPTO, "Error reading from entropy source (read only %lu bytes).", (unsigned long)n); return -1; + /* LCOV_EXCL_STOP */ }

return 0; @@ -2815,7 +2820,7 @@ crypto_seed_rng(void) * functions. If one succeeds, we'll accept the RNG as seeded. */ rand_poll_ok = RAND_poll(); if (rand_poll_ok == 0) - log_warn(LD_CRYPTO, "RAND_poll() failed."); + log_warn(LD_CRYPTO, "RAND_poll() failed."); // LCOV_EXCL_LINE

load_entropy_ok = !crypto_strongest_rand_raw(buf, sizeof(buf)); if (load_entropy_ok) {