MINOR: ssl: add ssl_{c,s}_chain_der fetch methods
authorWilliam Dauchy <w.dauchy@criteo.com>
Thu, 6 Aug 2020 16:11:38 +0000 (18:11 +0200)
committerWilliam Lallemand <wlallemand@haproxy.org>
Fri, 7 Aug 2020 13:38:40 +0000 (15:38 +0200)
Following work from Arjen and Mathilde, it adds ssl_{c,s}_chain_der
methods; it returns DER encoded certs from SSL_get_peer_cert_chain

Also update existing vtc tests to add random intermediate certificates

When getting the result through this header:
  http-response add-header x-ssl-chain-der %[ssl_c_chain_der,hex]
One can parse it with any lib accepting ASN.1 DER data, such as in go:
  bin, err := encoding/hex.DecodeString(cert)
  certs_parsed, err := x509.ParseCertificates(bin)

Cc: Arjen Nienhuis <arjen@zorgdoc.nl>
Signed-off-by: Mathilde Gilles <m.gilles@criteo.com>
Signed-off-by: William Dauchy <w.dauchy@criteo.com>

doc/configuration.txt
reg-tests/ssl/client1.pem
reg-tests/ssl/common.pem
reg-tests/ssl/ssl_client_samples.vtc
reg-tests/ssl/ssl_server_samples.vtc
src/ssl_sample.c

index 9afb566..98ec939 100644 (file)
@@ -17062,6 +17062,13 @@ ssl_c_der : binary
   incoming connection was made over an SSL/TLS transport layer. When used for
   an ACL, the value(s) to match against can be passed in hexadecimal form.
 
+ssl_c_der_chain : binary
+  Returns the DER formatted chain certificate presented by the client when the
+  incoming connection was made over an SSL/TLS transport layer. When used for
+  an ACL, the value(s) to match against can be passed in hexadecimal form. One
+  can parse the result with any lib accepting ASN.1 DER data. It currentlly
+  does not support resumed sessions.
+
 ssl_c_err : integer
   When the incoming connection was made over an SSL/TLS transport layer,
   returns the ID of the first error detected during verification at depth 0, or
@@ -17426,6 +17433,13 @@ ssl_s_der : binary
   outgoing connection was made over an SSL/TLS transport layer. When used for
   an ACL, the value(s) to match against can be passed in hexadecimal form.
 
+ssl_s_chain_der : binary
+  Returns the DER formatted chain certificate presented by the server when the
+  outgoing connection was made over an SSL/TLS transport layer. When used for
+  an ACL, the value(s) to match against can be passed in hexadecimal form. One
+  can parse the result with any lib accepting ASN.1 DER data. It currentlly
+  does not support resumed sessions.
+
 ssl_s_key_alg : string
   Returns the name of the algorithm used to generate the key of the certificate
   presented by the server when the outgoing connection was made over an
index 3725f79..d830a42 100644 (file)
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 -----END CERTIFICATE-----
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+wLsGf3R1+/I2zQE+lsj7RasZtA/Cos92iEGDAPvFbx9e+roG8Gg8KBsEJu/HN0JH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+-----END CERTIFICATE-----
index db5305a..c23d182 100644 (file)
@@ -37,6 +37,7 @@ haproxy h1 -conf {
         ${no-htx} option http-use-htx
 
         http-response add-header x-ssl-der %[ssl_c_der,hex]
+        http-response add-header x-ssl-chain-der %[ssl_c_chain_der,hex]
         http-response add-header x-ssl-sha1 %[ssl_c_sha1,hex]
         http-response add-header x-ssl-notafter %[ssl_c_notafter]
         http-response add-header x-ssl-notbefore %[ssl_c_notbefore]
@@ -58,6 +59,7 @@ client c1 -connect ${h1_clearlst_sock} {
     rxresp
     expect resp.status == 200
     expect resp.http.x-ssl-der ~ 3082052D30820315020102300D0.*995ED3BE2BFB923A3EB71FA07002E
+    expect resp.http.x-ssl-chain-der ~ 3082096B30820553A0030201020.*0237D08F425C8414A23D436415502
     expect resp.http.x-ssl-sha1 == "D9C3BAE37EA5A7EDB7B3C9BDD4DCB2FE58A412E4"
     expect resp.http.x-ssl-notafter == "500421185942Z"
     expect resp.http.x-ssl-notbefore == "200428185942Z"
index 0ee2998..53dd1b8 100644 (file)
@@ -40,6 +40,7 @@ haproxy h1 -conf {
         http-response add-header x-ssl-s_serial %[ssl_s_serial,hex]
         http-response add-header x-ssl-key_alg %[ssl_s_key_alg]
         http-response add-header x-ssl-der %[ssl_s_der,hex]
+        http-response add-header x-ssl-chain-der %[ssl_s_chain_der,hex]
         http-response add-header x-ssl-version %[ssl_s_version]
 
         server s1 "${tmpdir}/ssl.sock" ssl verify none sni str(www.test1.com)
@@ -67,7 +68,8 @@ client c1 -connect ${h1_clearlst_sock} {
     expect resp.http.x-ssl-s_serial == "02"
     expect resp.http.x-ssl-key_alg == "rsaEncryption"
     expect resp.http.x-ssl-version == "3"
-    expect resp.http.x-ssl-der ~ 3082067930820461A0030201020201.*
+    expect resp.http.x-ssl-der ~ 3082067930820461A0030201020201.*5E3D4498BB847BC4DE093F9AD1AD3
+    expect resp.http.x-ssl-chain-der ~ 3082067930820461A0030201020201.*527A6D6780A610484CE356C4C4E1C
 } -run
 
 
index f52ae89..a21ae33 100644 (file)
@@ -136,6 +136,73 @@ out:
        return ret;
 }
 
+/* binary, returns a chain certificate in a binary chunk (der/raw).
+ * The 5th keyword char is used to support only peer cert
+ */
+static int
+smp_fetch_ssl_x_chain_der(const struct arg *args, struct sample *smp, const char *kw, void *private)
+{
+       int cert_peer = (kw[4] == 'c' || kw[4] == 's') ? 1 : 0;
+       int conn_server = (kw[4] == 's') ? 1 : 0;
+       struct buffer *smp_trash;
+       struct buffer *tmp_trash = NULL;
+       struct connection *conn;
+       STACK_OF(X509) *certs = NULL;
+       X509 *crt = NULL;
+       SSL *ssl;
+       int ret = 0;
+       int num_certs;
+       int i;
+
+       if (conn_server)
+               conn = cs_conn(objt_cs(smp->strm->si[1].end));
+       else
+               conn = objt_conn(smp->sess->origin);
+
+       if (!conn)
+               return 0;
+
+       ssl = ssl_sock_get_ssl_object(conn);
+       if (!ssl)
+               return 0;
+
+       if (conn->flags & CO_FL_WAIT_XPRT) {
+               smp->flags |= SMP_F_MAY_CHANGE;
+               return 0;
+       }
+
+       if (!cert_peer)
+               return 0;
+
+       certs = SSL_get_peer_cert_chain(ssl);
+       if (!certs)
+               return 0;
+
+       num_certs = sk_X509_num(certs);
+       if (!num_certs)
+               goto out;
+       smp_trash = get_trash_chunk();
+       tmp_trash = alloc_trash_chunk();
+       if (!tmp_trash)
+               goto out;
+       for (i = 0; i < num_certs; i++) {
+               crt = sk_X509_value(certs, i);
+               if (ssl_sock_crt2der(crt, tmp_trash) <= 0)
+                       goto out;
+               chunk_cat(smp_trash, tmp_trash);
+       }
+
+       smp->data.u.str = *smp_trash;
+       smp->data.type = SMP_T_BIN;
+       ret = 1;
+out:
+       if (tmp_trash)
+               free_trash_chunk(tmp_trash);
+       if (certs)
+               sk_X509_pop_free(certs, X509_free);
+       return ret;
+}
+
 /* binary, returns serial of certificate in a binary chunk.
  * The 5th keyword char is used to know if SSL_get_certificate or SSL_get_peer_certificate
  * should be use.
@@ -1389,6 +1456,7 @@ static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, {
        { "ssl_c_ca_err",           smp_fetch_ssl_c_ca_err,       0,                   NULL,    SMP_T_SINT, SMP_USE_L5CLI },
        { "ssl_c_ca_err_depth",     smp_fetch_ssl_c_ca_err_depth, 0,                   NULL,    SMP_T_SINT, SMP_USE_L5CLI },
        { "ssl_c_der",              smp_fetch_ssl_x_der,          0,                   NULL,    SMP_T_BIN,  SMP_USE_L5CLI },
+       { "ssl_c_chain_der",        smp_fetch_ssl_x_chain_der,    0,                   NULL,    SMP_T_BIN,  SMP_USE_L5CLI },
        { "ssl_c_err",              smp_fetch_ssl_c_err,          0,                   NULL,    SMP_T_SINT, SMP_USE_L5CLI },
        { "ssl_c_i_dn",             smp_fetch_ssl_x_i_dn,         ARG3(0,STR,SINT,STR),val_dnfmt,    SMP_T_STR,  SMP_USE_L5CLI },
        { "ssl_c_key_alg",          smp_fetch_ssl_x_key_alg,      0,                   NULL,    SMP_T_STR,  SMP_USE_L5CLI },
@@ -1458,6 +1526,7 @@ static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, {
 
 /* SSL server certificate fetches */
        { "ssl_s_der",              smp_fetch_ssl_x_der,          0,                   NULL,    SMP_T_BIN,  SMP_USE_L5CLI },
+       { "ssl_s_chain_der",        smp_fetch_ssl_x_chain_der,    0,                   NULL,    SMP_T_BIN,  SMP_USE_L5CLI },
        { "ssl_s_key_alg",          smp_fetch_ssl_x_key_alg,      0,                   NULL,    SMP_T_STR,  SMP_USE_L5CLI },
        { "ssl_s_notafter",         smp_fetch_ssl_x_notafter,     0,                   NULL,    SMP_T_STR,  SMP_USE_L5CLI },
        { "ssl_s_notbefore",        smp_fetch_ssl_x_notbefore,    0,                   NULL,    SMP_T_STR,  SMP_USE_L5CLI },