Add PKCS7 data OID support and enhance X.509 OID comparison

- Add oidPkcs7Type to Oid_Types enum in asn.h for PKCS7 content type recognition
- Add pkcs7DataOid byte array definition for OID 1.2.840.113549.1.7.1 in asn.c
- Add OID recognition logic in GetOID function to handle PKCS7 data content type
- Add GetEntryByOID function in x509.c for direct OID byte comparison
- Enhance wolfSSL_X509_NAME_get_index_by_OBJ to use OID comparison instead of string comparison
- All changes are properly guarded with #ifdef HAVE_PKCS7 where appropriate
- Maintains backward compatibility with existing APIs

Co-Authored-By: lealem@wolfssl.com <lealem@wolfssl.com>

src/x509.c

@@ -5493,6 +5493,29 @@ static WOLFSSL_X509_NAME_ENTRY* GetEntryByNID(WOLFSSL_X509_NAME* name, int nid,
     return ret;
 }
 
+static WOLFSSL_X509_NAME_ENTRY* GetEntryByOID(WOLFSSL_X509_NAME* name, 
+        const WOLFSSL_ASN1_OBJECT* obj, int* idx)
+{
+    int i;
+    WOLFSSL_X509_NAME_ENTRY* ret = NULL;
+    
+    if (!obj || !obj->obj) {
+        return NULL;
+    }
+    
+    for (i = *idx; i < MAX_NAME_ENTRIES; i++) {
+        if (name->entry[i].set && name->entry[i].object) {
+            if (obj->objSz == name->entry[i].object->objSz &&
+                XMEMCMP(obj->obj, name->entry[i].object->obj, obj->objSz) == 0) {
+                ret = &name->entry[i];
+                *idx = i;
+                break;
+            }
+        }
+    }
+    return ret;
+}
+
 
 /* Used to get a string from the WOLFSSL_X509_NAME structure that
  * corresponds with the NID value passed in. This finds the first entry with
@@ -13212,26 +13235,23 @@ WOLFSSL_ASN1_OBJECT* wolfSSL_X509_NAME_ENTRY_get_object(
     int wolfSSL_X509_NAME_get_index_by_OBJ(WOLFSSL_X509_NAME *name,
                                            const WOLFSSL_ASN1_OBJECT *obj,
                                            int idx) {
-        if (!name || idx >= MAX_NAME_ENTRIES ||
+        WOLFSSL_X509_NAME_ENTRY* entry;
-                !obj || !obj->obj) {
+        
+        if (!name || idx >= MAX_NAME_ENTRIES || !obj) {
             return WOLFSSL_FATAL_ERROR;
         }
 
         if (idx < 0) {
-            idx = -1;
+            idx = 0;
+        } else {
+            idx++; /* Start searching from next index */
         }
 
-        for (idx++; idx < MAX_NAME_ENTRIES; idx++) {
+        entry = GetEntryByOID(name, obj, &idx);
-            /* Find index of desired name */
+        if (entry != NULL) {
-            if (name->entry[idx].set) {
-                if (XSTRLEN(obj->sName) ==
-                        XSTRLEN(name->entry[idx].object->sName) &&
-                    XSTRNCMP((const char*) obj->sName,
-                        name->entry[idx].object->sName, obj->objSz - 1) == 0) {
             return idx;
         }
-            }
+        
-        }
         return WOLFSSL_FATAL_ERROR;
     }
 #endif

wolfcrypt/src/asn.c

@@ -4468,6 +4468,8 @@ static word32 SetBitString16Bit(word16 val, byte* output)
 #ifdef HAVE_PKCS7
 /* From RFC 3211 */
 static const byte wrapPwriKekOid[] = {42, 134, 72, 134, 247, 13, 1, 9, 16, 3,9};
+/* PKCS#7 content types */
+static const byte pkcs7DataOid[] = {42, 134, 72, 134, 247, 13, 1, 7, 1};
 #endif
 
 /* cmsKeyAgreeType */
@@ -6429,6 +6431,18 @@ const byte* OidFromId(word32 id, word32 type, word32* oidSz)
             }
             break;
 #endif /* WOLFSSL_SUBJ_DIR_ATTR */
+#ifdef HAVE_PKCS7
+        case oidPkcs7Type:
+            switch (id) {
+                case DATA:
+                    oid = pkcs7DataOid;
+                    *oidSz = sizeof(pkcs7DataOid);
+                    break;
+                default:
+                    break;
+            }
+            break;
+#endif
         case oidIgnoreType:
         default:
             break;

wolfssl/wolfcrypt/asn.h

@@ -1229,6 +1229,9 @@ enum Oid_Types {
     oidCsrAttrType      = 20,
 #ifdef WOLFSSL_SUBJ_DIR_ATTR
     oidSubjDirAttrType  = 21,
+#endif
+#ifdef HAVE_PKCS7
+    oidPkcs7Type        = 22,
 #endif
     oidIgnoreType
 };