Registry client: Implement the "winreg_QueryValue" call

This is needed for the registry patchfile library

diff --git a/source4/lib/registry/rpc.c b/source4/lib/registry/rpc.c
index 83c6dc762c98a52c89eb09884b913e0c4c52a084..b5918dc4db8151f2fa5499ce8ef91d18f8231b33 100644 (file)
--- a/source4/lib/registry/rpc.c
+++ b/source4/lib/registry/rpc.c
@@ -287,6 +287,53 @@ static WERROR rpc_get_value_by_index(TALLOC_CTX *mem_ctx,
        return r.out.result;
 }
 
+static WERROR rpc_get_value_by_name(TALLOC_CTX *mem_ctx,
+                                    const struct registry_key *parent,
+                                    const char *value_name,
+                                    uint32_t *type,
+                                    DATA_BLOB *data)
+{
+       struct rpc_key *mykeydata = talloc_get_type(parent, struct rpc_key);
+       struct winreg_QueryValue r;
+       struct winreg_String name;
+       uint8_t value;
+       uint32_t val_size = MAX_VALSIZE;
+       uint32_t zero = 0;
+       WERROR error;
+       NTSTATUS status;
+
+       if (mykeydata->num_values == -1) {
+               error = rpc_query_key(mem_ctx, parent);
+               if(!W_ERROR_IS_OK(error)) return error;
+       }
+
+       chars_to_winreg_String(mem_ctx, &name, value_name);
+
+       ZERO_STRUCT(r);
+       r.in.handle = &mykeydata->pol;
+       r.in.value_name = name;
+       r.in.type = type;
+       r.in.data = &value;
+       r.in.size = &val_size;
+       r.in.length = &zero;
+       r.out.type = type;
+       r.out.data = &value;
+       r.out.size = &val_size;
+       r.out.length = &zero;
+
+       status = dcerpc_winreg_QueryValue(mykeydata->pipe, mem_ctx, &r);
+
+       if (!NT_STATUS_IS_OK(status)) {
+               DEBUG(1, ("QueryValue failed - %s\n", nt_errstr(status)));
+               return ntstatus_to_werror(status);
+       }
+
+       *type = *(r.out.type);
+       *data = data_blob_talloc(mem_ctx, r.out.data, *r.out.length);
+
+       return r.out.result;
+}
+
 static WERROR rpc_get_subkey_by_index(TALLOC_CTX *mem_ctx,
                                      const struct registry_key *parent,
                                      uint32_t n,
@@ -471,6 +518,7 @@ static struct registry_operations reg_backend_rpc = {
        .get_predefined_key = rpc_get_predefined_key,
        .enum_key = rpc_get_subkey_by_index,
        .enum_value = rpc_get_value_by_index,
+       .get_value = rpc_get_value_by_name,
        .create_key = rpc_add_key,
        .delete_key = rpc_del_key,
        .get_key_info = rpc_get_info,