Implement TLSv1.3 style CertificateStatus
We remove the separate CertificateStatus message for TLSv1.3, and instead
send back the response in the appropriate Certificate message extension.
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2020)
diff --git a/ssl/statem/statem_clnt.c b/ssl/statem/statem_clnt.c
index 00062ff..98e19b5 100644
--- a/ssl/statem/statem_clnt.c
+++ b/ssl/statem/statem_clnt.c
@@ -169,17 +169,6 @@
break;
case TLS_ST_CR_CERT:
- /*
- * The CertificateStatus message is optional even if
- * |tlsext_status_expected| is set
- */
- if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) {
- st->hand_state = TLS_ST_CR_CERT_STATUS;
- return 1;
- }
- /* Fall through */
-
- case TLS_ST_CR_CERT_STATUS:
if (mt == SSL3_MT_FINISHED) {
st->hand_state = TLS_ST_CR_FINISHED;
return 1;
@@ -2191,41 +2180,57 @@
return MSG_PROCESS_ERROR;
}
-MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
+/*
+ * In TLSv1.3 this is called from the extensions code, otherwise it is used to
+ * parse a separate message. Returns 1 on success or 0 on failure. On failure
+ * |*al| is populated with a suitable alert code.
+ */
+int tls_process_cert_status_body(SSL *s, PACKET *pkt, int *al)
{
- int al;
size_t resplen;
unsigned int type;
if (!PACKET_get_1(pkt, &type)
|| type != TLSEXT_STATUSTYPE_ocsp) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
- goto f_err;
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY,
+ SSL_R_UNSUPPORTED_STATUS_TYPE);
+ return 0;
}
if (!PACKET_get_net_3_len(pkt, &resplen)
|| PACKET_remaining(pkt) != resplen) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
- goto f_err;
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH);
+ return 0;
}
s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
if (s->tlsext_ocsp_resp == NULL) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
- goto f_err;
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, ERR_R_MALLOC_FAILURE);
+ return 0;
}
if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
- goto f_err;
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH);
+ return 0;
}
s->tlsext_ocsp_resplen = resplen;
+
+ return 1;
+}
+
+
+MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
+{
+ int al;
+
+ if (!tls_process_cert_status_body(s, pkt, &al)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ ossl_statem_set_error(s);
+ return MSG_PROCESS_ERROR;
+ }
+
return MSG_PROCESS_CONTINUE_READING;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- ossl_statem_set_error(s);
- return MSG_PROCESS_ERROR;
}
/*
