skip PAGER_MJ_PGNO during cipher_integrity_check

sjlombardo · sjlombardo · commit b0dcc5cbd059 · 2020-11-10T16:51:20.000-05:00
diff --git a/src/crypto_impl.c b/src/crypto_impl.c
@@ -1278,6 +1278,9 @@ int sqlcipher_codec_ctx_integrity_check(codec_ctx *ctx, Parse *pParse, char *col
     int payload_sz = ctx->page_sz - ctx->reserve_sz + ctx->iv_sz;
     int read_sz = ctx->page_sz;
 
+    /* skip integrity check on PAGER_MJ_PGNO since it will have no valid content */
+    if(sqlite3pager_is_mj_pgno(ctx->pBt->pBt->pPager, page)) continue;
+
     if(page==1) {
       int page1_offset = ctx->plaintext_header_sz ? ctx->plaintext_header_sz : FILE_HEADER_SZ;
       read_sz = read_sz - page1_offset;
