commit af70d3c459d3b11b04e49c1b659183fe2e96e252 Author: Neel Chauhan neel@neelc.org Date: Fri Apr 27 17:45:16 2018 -0400

Optimize legacy intro point digest calculation. --- changes/bug23107 | 6 ++++++ src/or/hs_circuit.c | 19 ++++--------------- src/or/hs_service.c | 4 ++++ src/or/hs_service.h | 3 +++ 4 files changed, 17 insertions(+), 15 deletions(-)

diff --git a/changes/bug23107 b/changes/bug23107 new file mode 100644 index 000000000..70d1856bb --- /dev/null +++ b/changes/bug23107 @@ -0,0 +1,6 @@ + o Code simplification and refactoring: + - Put a SHA1 public key digest in hs_service_intro_point_t, and use it in + register_intro_circ() and service_intro_point_new(). This prevents the + digest from being re-calculated each time. Fixes bug 23107. Patch by + Neel Chauhan. + diff --git a/src/or/hs_circuit.c b/src/or/hs_circuit.c index 3a674f622..417447063 100644 --- a/src/or/hs_circuit.c +++ b/src/or/hs_circuit.c @@ -193,11 +193,8 @@ register_intro_circ(const hs_service_intro_point_t *ip, tor_assert(circ);

if (ip->base.is_only_legacy) { - uint8_t digest[DIGEST_LEN]; - if (BUG(crypto_pk_get_digest(ip->legacy_key, (char *) digest) < 0)) { - return; - } - hs_circuitmap_register_intro_circ_v2_service_side(circ, digest); + hs_circuitmap_register_intro_circ_v2_service_side(circ, + ip->legacy_key_digest); } else { hs_circuitmap_register_intro_circ_v3_service_side(circ, &ip->auth_key_kp.pubkey); @@ -675,22 +672,14 @@ setup_introduce1_data(const hs_desc_intro_point_t *ip, origin_circuit_t * hs_circ_service_get_intro_circ(const hs_service_intro_point_t *ip) { - origin_circuit_t *circ = NULL; - tor_assert(ip);

if (ip->base.is_only_legacy) { - uint8_t digest[DIGEST_LEN]; - if (BUG(crypto_pk_get_digest(ip->legacy_key, (char *) digest) < 0)) { - goto end; - } - circ = hs_circuitmap_get_intro_circ_v2_service_side(digest); + return hs_circuitmap_get_intro_circ_v2_service_side(ip->legacy_key_digest); } else { - circ = hs_circuitmap_get_intro_circ_v3_service_side( + return hs_circuitmap_get_intro_circ_v3_service_side( &ip->auth_key_kp.pubkey); } - end: - return circ; }

/* Called when we fail building a rendezvous circuit at some point other than diff --git a/src/or/hs_service.c b/src/or/hs_service.c index e40e9203e..cf2760760 100644 --- a/src/or/hs_service.c +++ b/src/or/hs_service.c @@ -441,6 +441,10 @@ service_intro_point_new(const extend_info_t *ei, unsigned int is_legacy) if (crypto_pk_generate_key(ip->legacy_key) < 0) { goto err; } + if (crypto_pk_get_digest(ip->legacy_key, + (char *) ip->legacy_key_digest) < 0) { + goto err; + } }

if (ei == NULL) { diff --git a/src/or/hs_service.h b/src/or/hs_service.h index 2e27d8a89..ea7ee9ecf 100644 --- a/src/or/hs_service.h +++ b/src/or/hs_service.h @@ -51,6 +51,9 @@ typedef struct hs_service_intro_point_t { * the base object legacy flag is set. */ crypto_pk_t *legacy_key;

+ /* Legacy key SHA1 public key digest. */ + uint8_t legacy_key_digest[DIGEST_LEN]; + /* Amount of INTRODUCE2 cell accepted from this intro point. */ uint64_t introduce2_count;