MINOR: ssl: add ssl_{c,s}_chain_der fetch methods

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>
This commit is contained in:
William Dauchy 2020-08-06 18:11:38 +02:00 committed by William Lallemand
parent 98c35045aa
commit a598b500b4
6 changed files with 247 additions and 2 deletions

View 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

View File

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-----END CERTIFICATE-----
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View File

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ej4vT+1V2w9Sa4Wo3UCo84jcm5v/4z7jCYh4BRQ60CFb7GLxZoqXIslcGSPool3n
jl8JWoaLXrJUPfZGXo1iAlayJ5EiMyZl4eB/TBUf6TMm8vLvsPiUT+CEsjLppOdS
eYppZAZ6H1JrJGs5kKBdOJHGn6Pkp5QsHIswOBd1HqHrBbYbZmDaDLRHduILWLrM
e0/IfDdeXB/bKfmZoEpT8xRiauw15p0AHLumiK7KISAehfgBqUnxx+YmgGoZ7EWX
KnMYAfCuC6oJ1DL0gp4Z9yMK1eu+GV1sLxPq9ZruEHW1R+H+4sGyiA5Gso2tgB6/
XW//wxKclNp5LZR7hqfs/kGuh5asrJrnEbMwWn2+tr/LqfYtYh1D6nHfIXpT0o1d
rNy/HrsKnRDMWxjm03r4hCViuNVD3Zb9anAF/NSPDVu8ATM5JbJNrCYX4eipz6ZE
aQBkwIBkTPgtgP4r8v2G+uMYDw8nq7xh72FK107aeTTwc6MgU5jfeFNMr2XJisJd
lSem1ngKYQSEzjVsTE4c
-----END CERTIFICATE-----

View 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"

View 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

View 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 },