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MINOR: ssl: add fetch and ACL 'client_crt' to test a client cert is present

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Useful in case of 'verify optional' to know if the client sent a certificate.
This commit is contained in:
Emeric Brun 2012-09-21 13:15:06 +02:00 committed by Willy Tarreau
parent 1a073b4650
commit e64aef124a
1 changed files with 50 additions and 9 deletions
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45
src/ssl_sock.c
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@ -70,6 +70,8 @@
#include <proto/ssl_sock.h>
#include <proto/task.h>
#define SSL_SOCK_ST_FL_VERIFY_DONE 0x00000001
static int sslconns = 0;
void ssl_sock_infocbk(const SSL *ssl, int where, int ret)
@ -84,6 +86,22 @@ void ssl_sock_infocbk(const SSL *ssl, int where, int ret)
}
}
/* Callback is called for each certificate of the chain during a verify
ok is set to 1 if preverify detect no error on current certificate.
Returns 0 to break the handshake, 1 otherwise. */
int ssl_sock_verifycbk(int ok, X509_STORE_CTX *x_store)
{
SSL *ssl;
struct connection *conn;
ssl = X509_STORE_CTX_get_ex_data(x_store, SSL_get_ex_data_X509_STORE_CTX_idx());
conn = (struct connection *)SSL_get_app_data(ssl);
conn->data_st |= SSL_SOCK_ST_FL_VERIFY_DONE;
return ok;
}
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
/* Sets the SSL ctx of <ssl> to match the advertised server name. Returns a
* warning when no match is found, which implies the default (first) cert
@ -428,7 +446,7 @@ int ssl_sock_prepare_ctx(struct bind_conf *bind_conf, SSL_CTX *ctx, struct proxy
SSL_CTX_set_options(ctx, ssloptions);
SSL_CTX_set_mode(ctx, sslmode);
SSL_CTX_set_verify(ctx, bind_conf->verify ? bind_conf->verify : SSL_VERIFY_NONE, NULL);
SSL_CTX_set_verify(ctx, bind_conf->verify ? bind_conf->verify : SSL_VERIFY_NONE, ssl_sock_verifycbk);
if (bind_conf->verify & SSL_VERIFY_PEER) {
if (bind_conf->cafile) {
/* load CAfile to verify */
@ -861,6 +879,27 @@ static void ssl_sock_shutw(struct connection *conn, int clean)
/***** Below are some sample fetching functions for ACL/patterns *****/
/* boolean, returns true if client cert was present */
static int
smp_fetch_client_crt(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
const struct arg *args, struct sample *smp)
{
if (!l4 || l4->si[0].conn.data != &ssl_sock)
return 0;
if (!(l4->si[0].conn.flags & CO_FL_CONNECTED)) {
smp->flags |= SMP_F_MAY_CHANGE;
return 0;
}
smp->flags = 0;
smp->type = SMP_T_BOOL;
smp->data.uint = SSL_SOCK_ST_FL_VERIFY_DONE & l4->si[0].conn.data_st ? 1 : 0;
return 1;
}
/* boolean, returns true if data layer is SSL */
static int
smp_fetch_is_ssl(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
@ -1047,6 +1086,7 @@ static int bind_parse_verify(char **args, int cur_arg, struct proxy *px, struct
* Please take care of keeping this list alphabetically sorted.
*/
static struct sample_fetch_kw_list sample_fetch_keywords = {{ },{
{ "client_crt", smp_fetch_client_crt, 0, NULL, SMP_T_BOOL, SMP_CAP_REQ|SMP_CAP_RES },
{ "is_ssl", smp_fetch_is_ssl, 0, NULL, SMP_T_BOOL, SMP_CAP_REQ|SMP_CAP_RES },
{ "ssl_has_sni", smp_fetch_has_sni, 0, NULL, SMP_T_BOOL, SMP_CAP_REQ|SMP_CAP_RES },
{ "ssl_sni", smp_fetch_ssl_sni, 0, NULL, SMP_T_CSTR, SMP_CAP_REQ|SMP_CAP_RES },
@ -1057,7 +1097,8 @@ static struct sample_fetch_kw_list sample_fetch_keywords = {{ },{
* Please take care of keeping this list alphabetically sorted.
*/
static struct acl_kw_list acl_kws = {{ },{
{ "is_ssl", acl_parse_int, smp_fetch_is_ssl, acl_match_nothing, ACL_USE_L6REQ_PERMANENT, 0 },
{ "client_crt", acl_parse_int, smp_fetch_client_crt, acl_match_nothing, ACL_USE_L6REQ_PERMANENT|ACL_MAY_LOOKUP, 0 },
{ "is_ssl", acl_parse_int, smp_fetch_is_ssl, acl_match_nothing, ACL_USE_L6REQ_PERMANENT|ACL_MAY_LOOKUP, 0 },
{ "ssl_has_sni", acl_parse_int, smp_fetch_has_sni, acl_match_nothing, ACL_USE_L6REQ_PERMANENT, 0 },
{ "ssl_sni", acl_parse_str, smp_fetch_ssl_sni, acl_match_str, ACL_USE_L6REQ_PERMANENT|ACL_MAY_LOOKUP, 0 },
{ "ssl_sni_end", acl_parse_str, smp_fetch_ssl_sni, acl_match_end, ACL_USE_L6REQ_PERMANENT|ACL_MAY_LOOKUP, 0 },