From 2557eaeac81c93f9e12534ac64a7634ab2bdb0fc Mon Sep 17 00:00:00 2001 From: =?utf8?q?Bodo=20M=C3=B6ller?= Date: Mon, 24 Jan 2000 17:57:56 +0000 Subject: [PATCH] Avoid a race condition. --- CHANGES | 5 +++++ ssl/s2_clnt.c | 38 ++++++++++++++++++++------------------ 2 files changed, 25 insertions(+), 18 deletions(-) diff --git a/CHANGES b/CHANGES index f5803d75bc..2389e2eb4d 100644 --- a/CHANGES +++ b/CHANGES @@ -4,6 +4,11 @@ Changes between 0.9.4 and 0.9.5 [xx XXX 1999] + *) Avoid a race condition in s2_clnt.c (function get_server_hello) that + made it impossible to use the same SSL_SESSION data structure in + SSL2 clients in multiple threads. + [Bodo Moeller] + *) The return value of RAND_load_file() no longer counts bytes obtained by stat(). RAND_load_file(..., -1) is new and uses the complete file to seed the PRNG (previously an explicit byte count was required). diff --git a/ssl/s2_clnt.c b/ssl/s2_clnt.c index c7ec4c07d1..e4e9660cb4 100644 --- a/ssl/s2_clnt.c +++ b/ssl/s2_clnt.c @@ -435,26 +435,28 @@ static int get_server_hello(SSL *s) return(-1); } s->session->cipher=sk_SSL_CIPHER_value(cl,i); - } - if (s->session->peer != NULL) - X509_free(s->session->peer); - -#if 0 /* What is all this meant to accomplish?? */ - /* hmmm, can we have the problem of the other session with this - * cert, Free's it before we increment the reference count. */ - CRYPTO_w_lock(CRYPTO_LOCK_X509); - s->session->peer=s->session->sess_cert->key->x509; - /* Shouldn't do this: already locked */ - /*CRYPTO_add(&s->session->peer->references,1,CRYPTO_LOCK_X509);*/ - s->session->peer->references++; - CRYPTO_w_unlock(CRYPTO_LOCK_X509); -#else - s->session->peer = s->session->sess_cert->peer_key->x509; - /* peer_key->x509 has been set by ssl2_set_certificate. */ - CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509); -#endif + if (s->session->peer != NULL) /* can't happen*/ + { + ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); + SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_INTERNAL_ERROR); + return(-1); + } + + s->session->peer = s->session->sess_cert->peer_key->x509; + /* peer_key->x509 has been set by ssl2_set_certificate. */ + CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509); + } + + if (s->session->peer != s->session->sess_cert->peer_key->x509) + /* can't happen */ + { + ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); + SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_INTERNAL_ERROR); + return(-1); + } + s->s2->conn_id_length=s->s2->tmp.conn_id_length; memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length); return(1); -- 2.25.1