commit 42751e2123f6dcc87f3992d38c1889f7da981a7b Author: Nick Mathewson nickm@torproject.org Date: Thu Jan 11 12:49:28 2018 -0500

On shutdown, mark openssl as uninitialized.

This causes openssl to get completely reinitialized on startup, which is probably a good idea. --- src/common/crypto.c | 9 ++++++++- src/ext/csiphash.c | 6 ++++++ src/ext/siphash.h | 1 + 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/common/crypto.c b/src/common/crypto.c index 85bed538e..b519caed0 100644 --- a/src/common/crypto.c +++ b/src/common/crypto.c @@ -283,11 +283,12 @@ crypto_force_rand_ssleay(void) return 0; }

+static int have_seeded_siphash = 0; + /** Set up the siphash key if we haven't already done so. */ int crypto_init_siphash_key(void) { - static int have_seeded_siphash = 0; struct sipkey key; if (have_seeded_siphash) return 0; @@ -3495,6 +3496,12 @@ crypto_global_cleanup(void)

tor_free(crypto_openssl_version_str); tor_free(crypto_openssl_header_version_str); + + crypto_early_initialized_ = 0; + crypto_global_initialized_ = 0; + have_seeded_siphash = 0; + siphash_unset_global_key(); + return 0; }

diff --git a/src/ext/csiphash.c b/src/ext/csiphash.c index 508e4f6ce..0427c8795 100644 --- a/src/ext/csiphash.c +++ b/src/ext/csiphash.c @@ -123,3 +123,9 @@ void siphash_set_global_key(const struct sipkey *key) the_siphash_key.k1 = key->k1; the_siphash_key_is_set = 1; } + +void siphash_unset_global_key(void) +{ + the_siphash_key_is_set = 0; + memset(&the_siphash_key, 0, sizeof(the_siphash_key)); +} diff --git a/src/ext/siphash.h b/src/ext/siphash.h index d9b34b898..730e49937 100644 --- a/src/ext/siphash.h +++ b/src/ext/siphash.h @@ -9,5 +9,6 @@ uint64_t siphash24(const void *src, unsigned long src_sz, const struct sipkey *k

void siphash_set_global_key(const struct sipkey *key); uint64_t siphash24g(const void *src, unsigned long src_sz); +void siphash_unset_global_key(void);

#endif