From 3a490bbb1c9355bc0fefc50742ecc056d84332c1 Mon Sep 17 00:00:00 2001
From: Alex Gaynor <alex.gaynor@gmail.com>
Date: Fri, 7 Apr 2017 20:49:27 -0400
Subject: Fixed #3020 -- set entry type on SCTs from X.509 and OCSP extensions

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3149)
---
 crypto/ct/ct_x509v3.c | 41 +++++++++++++++++++++++++++++++++++++++--
 1 file changed, 39 insertions(+), 2 deletions(-)

(limited to 'crypto/ct')

diff --git a/crypto/ct/ct_x509v3.c b/crypto/ct/ct_x509v3.c
index 805ada088a..c16005dce1 100644
--- a/crypto/ct/ct_x509v3.c
+++ b/crypto/ct/ct_x509v3.c
@@ -30,12 +30,49 @@ static int i2r_SCT_LIST(X509V3_EXT_METHOD *method, STACK_OF(SCT) *sct_list,
     return 1;
 }
 
+static int set_sct_list_source(STACK_OF(SCT) *s, sct_source_t source) {
+    if (s != NULL) {
+        for (size_t i = 0; i < sk_SCT_num(s); i++) {
+            int res = SCT_set_source(
+                sk_SCT_value(s, i), SCT_SOURCE_X509V3_EXTENSION);
+            if (res != 1) {
+                return 0;
+            }
+        }
+    }
+    return 1;
+}
+
+static STACK_OF(SCT) *x509_ext_d2i_SCT_LIST(STACK_OF(SCT) **a,
+                                            const unsigned char **pp,
+                                            long len) {
+     STACK_OF(SCT) *s = d2i_SCT_LIST(a, pp, len);
+     if (set_sct_list_source(s, SCT_SOURCE_X509V3_EXTENSION) != 1) {
+         SCT_LIST_free(s);
+         *a = NULL;
+         return NULL;
+     }
+     return s;
+}
+
+static STACK_OF(SCT) *ocsp_ext_d2i_SCT_LIST(STACK_OF(SCT) **a,
+                                            const unsigned char **pp,
+                                            long len) {
+    STACK_OF(SCT) *s = d2i_SCT_LIST(a, pp, len);
+    if (set_sct_list_source(s, SCT_SOURCE_OCSP_STAPLED_RESPONSE) != 1) {
+        SCT_LIST_free(s);
+        *a = NULL;
+        return NULL;
+    }
+    return s;
+}
+
 /* Handlers for X509v3/OCSP Certificate Transparency extensions */
 const X509V3_EXT_METHOD v3_ct_scts[3] = {
     /* X509v3 extension in certificates that contains SCTs */
     { NID_ct_precert_scts, 0, NULL,
     NULL, (X509V3_EXT_FREE)SCT_LIST_free,
-    (X509V3_EXT_D2I)d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST,
+    (X509V3_EXT_D2I)x509_ext_d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST,
     NULL, NULL,
     NULL, NULL,
     (X509V3_EXT_I2R)i2r_SCT_LIST, NULL,
@@ -52,7 +89,7 @@ const X509V3_EXT_METHOD v3_ct_scts[3] = {
     /* OCSP extension that contains SCTs */
     { NID_ct_cert_scts, 0, NULL,
     0, (X509V3_EXT_FREE)SCT_LIST_free,
-    (X509V3_EXT_D2I)d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST,
+    (X509V3_EXT_D2I)ocsp_ext_d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST,
     NULL, NULL,
     NULL, NULL,
     (X509V3_EXT_I2R)i2r_SCT_LIST, NULL,
-- 
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