X509 x509_req.c: Set 'modified' flag when X509_req_info_st member data updated

We need to reencode X509_req_info_st if member data updated.

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: David von Oheimb <david.von.oheimb@siemens.com>
(Merged from https://github.com/openssl/openssl/pull/18879)

2 files changed, 26 insertions, 16 deletions

diff --git a/crypto/x509/x509_req.c b/crypto/x509/x509_req.c
index a69f9a723d..1be47174ac 100644
--- a/crypto/x509/x509_req.c
+++ b/crypto/x509/x509_req.c
@@ -229,44 +229,52 @@ X509_ATTRIBUTE *X509_REQ_get_attr(const X509_REQ *req, int loc)
 
 X509_ATTRIBUTE *X509_REQ_delete_attr(X509_REQ *req, int loc)
 {
-    return X509at_delete_attr(req->req_info.attributes, loc);
+    X509_ATTRIBUTE *attr = X509at_delete_attr(req->req_info.attributes, loc);
+
+    if (attr != NULL)
+        req->req_info.enc.modified = 1;
+    return attr;
 }
 
 int X509_REQ_add1_attr(X509_REQ *req, X509_ATTRIBUTE *attr)
 {
-    if (X509at_add1_attr(&req->req_info.attributes, attr))
-        return 1;
-    return 0;
+    if (!X509at_add1_attr(&req->req_info.attributes, attr))
+        return 0;
+    req->req_info.enc.modified = 1;
+    return 1;
 }
 
 int X509_REQ_add1_attr_by_OBJ(X509_REQ *req,
                               const ASN1_OBJECT *obj, int type,
                               const unsigned char *bytes, int len)
 {
-    if (X509at_add1_attr_by_OBJ(&req->req_info.attributes, obj,
-                                type, bytes, len))
-        return 1;
-    return 0;
+    if (!X509at_add1_attr_by_OBJ(&req->req_info.attributes, obj,
+                                 type, bytes, len))
+        return 0;
+    req->req_info.enc.modified = 1;
+    return 1;
 }
 
 int X509_REQ_add1_attr_by_NID(X509_REQ *req,
                               int nid, int type,
                               const unsigned char *bytes, int len)
 {
-    if (X509at_add1_attr_by_NID(&req->req_info.attributes, nid,
-                                type, bytes, len))
-        return 1;
-    return 0;
+    if (!X509at_add1_attr_by_NID(&req->req_info.attributes, nid,
+                                 type, bytes, len))
+        return 0;
+    req->req_info.enc.modified = 1;
+    return 1;
 }
 
 int X509_REQ_add1_attr_by_txt(X509_REQ *req,
                               const char *attrname, int type,
                               const unsigned char *bytes, int len)
 {
-    if (X509at_add1_attr_by_txt(&req->req_info.attributes, attrname,
-                                type, bytes, len))
-        return 1;
-    return 0;
+    if (!X509at_add1_attr_by_txt(&req->req_info.attributes, attrname,
+                                 type, bytes, len))
+        return 0;
+    req->req_info.enc.modified = 1;
+    return 1;
 }
 
 long X509_REQ_get_version(const X509_REQ *req)
diff --git a/crypto/x509/x_all.c b/crypto/x509/x_all.c
index a4e9cdaee8..ae061f234c 100644
--- a/crypto/x509/x_all.c
+++ b/crypto/x509/x_all.c
@@ -65,12 +65,14 @@ int X509_http_nbio(OCSP_REQ_CTX *rctx, X509 **pcert)
 
 int X509_REQ_sign(X509_REQ *x, EVP_PKEY *pkey, const EVP_MD *md)
 {
+    x->req_info.enc.modified = 1;
     return (ASN1_item_sign(ASN1_ITEM_rptr(X509_REQ_INFO), &x->sig_alg, NULL,
                            x->signature, &x->req_info, pkey, md));
 }
 
 int X509_REQ_sign_ctx(X509_REQ *x, EVP_MD_CTX *ctx)
 {
+    x->req_info.enc.modified = 1;
     return ASN1_item_sign_ctx(ASN1_ITEM_rptr(X509_REQ_INFO),
                               &x->sig_alg, NULL, x->signature, &x->req_info,
                               ctx);