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authorChristian Grothoff <christian@grothoff.org>2022-01-19 10:20:43 +0100
committerChristian Grothoff <christian@grothoff.org>2022-01-19 10:20:43 +0100
commit1ccd17d515d43b524dc06e3a4d206f19f873d0dd (patch)
treee4f7768d71b9eb091c0295f3300338aa8480e0dc
parenta261b98c73643a16e70ce4f22ed7cd8838967689 (diff)
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modify backend to support separate storage of meta data
-rw-r--r--src/backend/anastasis-httpd_policy_upload.c2
-rw-r--r--src/include/anastasis_database_plugin.h45
-rw-r--r--src/stasis/plugin_anastasis_postgres.c144
-rw-r--r--src/stasis/stasis-0001.sql5
4 files changed, 185 insertions, 11 deletions
diff --git a/src/backend/anastasis-httpd_policy_upload.c b/src/backend/anastasis-httpd_policy_upload.c
index 0bef15f..b63a82e 100644
--- a/src/backend/anastasis-httpd_policy_upload.c
+++ b/src/backend/anastasis-httpd_policy_upload.c
@@ -1121,6 +1121,8 @@ AH_handler_policy_post (
&puc->new_policy_upload_hash,
puc->upload,
puc->upload_size,
+ NULL, /* FIXME: meta-data! */
+ 0,
&puc->payment_identifier,
&version);
GNUNET_snprintf (version_s,
diff --git a/src/include/anastasis_database_plugin.h b/src/include/anastasis_database_plugin.h
index e5012a6..20e87d1 100644
--- a/src/include/anastasis_database_plugin.h
+++ b/src/include/anastasis_database_plugin.h
@@ -1,6 +1,6 @@
/*
This file is part of Anastasis
- Copyright (C) 2019-2021 Anastasis SARL
+ Copyright (C) 2019-2022 Anastasis SARL
Anastasis is free software; you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License as published by the Free Software
@@ -159,6 +159,24 @@ typedef bool
/**
+ * Function called on matching meta data. Note that if the client did
+ * not provide meta data for @a version, the function will be called
+ * with @a recovery_meta_data being NULL.
+ *
+ * @param cls closure
+ * @param version the version of the recovery document
+ * @param recovery_meta_data contains meta data about the encrypted recovery document
+ * @param recovery_meta_data_size size of @a recovery_meta_data blob
+ * @return #GNUNET_OK to continue to iterate, #GNUNET_NO to abort iteration
+ */
+typedef enum GNUNET_GenericReturnValue
+(*ANASTASIS_DB_RecoveryMetaCallback)(void *cls,
+ uint32_t version,
+ const void *recovery_meta_data,
+ size_t recovery_meta_data_size);
+
+
+/**
* Handle to interact with the database.
*
* Functions ending with "_TR" run their OWN transaction scope
@@ -329,6 +347,8 @@ struct ANASTASIS_DatabasePlugin
* @param recovery_data_hash hash of @a data
* @param recovery_data contains encrypted recovery document
* @param recovery_data_size size of @a recovery_data blob
+ * @param recovery_meta_data contains meta data about the encrypted recovery document
+ * @param recovery_meta_data_size size of @a recovery_meta_data blob
* @param payment_secret identifier for the payment, used to later charge on uploads
* @param[out] version set to the version assigned to the document by the database
* @return transaction status, 0 if upload could not be finished because @a payment_secret
@@ -342,11 +362,34 @@ struct ANASTASIS_DatabasePlugin
const struct GNUNET_HashCode *recovery_data_hash,
const void *recovery_data,
size_t recovery_data_size,
+ const void *recovery_meta_data,
+ size_t recovery_meta_data_size,
const struct ANASTASIS_PaymentSecretP *payment_secret,
uint32_t *version);
/**
+ * Fetch recovery document meta data for user. Returns
+ * meta data in descending order from @a max_version.
+ * The size of the result set may be limited.
+ *
+ * @param cls closure
+ * @param account_pub public key of the user's account
+ * @param max_version the maximum version number the user requests
+ * @param cb function to call on each result
+ * @param cb_cls closure for @a cb
+ * @return transaction status
+ */
+ enum GNUNET_DB_QueryStatus
+ (*get_recovery_meta_data)(
+ void *cls,
+ const struct ANASTASIS_CRYPTO_AccountPublicKeyP *account_pub,
+ uint32_t max_version,
+ ANASTASIS_DB_RecoveryMetaCallback cb,
+ void *cb_cls);
+
+
+ /**
* Fetch recovery document for user according given version.
*
* @param cls closure
diff --git a/src/stasis/plugin_anastasis_postgres.c b/src/stasis/plugin_anastasis_postgres.c
index b2391f8..801552d 100644
--- a/src/stasis/plugin_anastasis_postgres.c
+++ b/src/stasis/plugin_anastasis_postgres.c
@@ -1,6 +1,6 @@
/*
This file is part of Anastasis
- Copyright (C) 2020, 2021 Anastasis SARL
+ Copyright (C) 2020, 2021, 2022 Anastasis SARL
Anastasis is free software; you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License as published by the Free Software
@@ -15,8 +15,7 @@
*/
/**
* @file stasis/plugin_anastasis_postgres.c
- * @brief database helper functions for postgres used by the anastasis
- * @author Sree Harsha Totakura <sreeharsha@totakura.in>
+ * @brief database helper functions for postgres used by GNU Anastasis
* @author Christian Grothoff
* @author Marcello Stanisci
*/
@@ -306,7 +305,6 @@ prepare_statements (void *cls)
") VALUES "
"($1, $2, $3, $4, $5, $6);",
6),
-
GNUNET_PQ_make_prepare ("test_auth_iban_payment",
"SELECT"
" credit_val"
@@ -328,8 +326,6 @@ prepare_statements (void *cls)
") VALUES "
"($1, $2, $3, $4, $5, $6, $7);",
7),
-
-
GNUNET_PQ_make_prepare ("recovery_document_insert",
"INSERT INTO anastasis_recoverydocument "
"(user_id"
@@ -337,9 +333,10 @@ prepare_statements (void *cls)
",account_sig"
",recovery_data_hash"
",recovery_data"
+ ",recovery_meta_data"
") VALUES "
- "($1, $2, $3, $4, $5);",
- 5),
+ "($1, $2, $3, $4, $5, $6);",
+ 6),
GNUNET_PQ_make_prepare ("truth_select",
"SELECT "
" method_name"
@@ -631,7 +628,7 @@ postgres_preflight (void *cls)
* must point to a constant
* @return #GNUNET_OK on success
*/
-static int
+static enum GNUNET_GenericReturnValue
begin_transaction (void *cls,
const char *name)
{
@@ -834,6 +831,8 @@ postgres_store_recovery_document (
const struct GNUNET_HashCode *recovery_data_hash,
const void *recovery_data,
size_t recovery_data_size,
+ const void *recovery_meta_data,
+ size_t recovery_meta_data_size,
const struct ANASTASIS_PaymentSecretP *payment_secret,
uint32_t *version)
{
@@ -1017,6 +1016,10 @@ postgres_store_recovery_document (
GNUNET_PQ_query_param_auto_from_type (recovery_data_hash),
GNUNET_PQ_query_param_fixed_size (recovery_data,
recovery_data_size),
+ (NULL == recovery_meta_data)
+ ? GNUNET_PQ_query_param_null ()
+ : GNUNET_PQ_query_param_fixed_size (recovery_meta_data,
+ recovery_meta_data_size),
GNUNET_PQ_query_param_end
};
@@ -2193,6 +2196,128 @@ postgres_get_latest_recovery_document (
/**
+ * Closure for meta_iterator().
+ */
+struct MetaIteratorContext
+{
+ /**
+ * Function to call on each result.
+ */
+ ANASTASIS_DB_RecoveryMetaCallback cb;
+
+ /**
+ * Closure for @e cb.
+ */
+ void *cb_cls;
+
+ /**
+ * Set to true on database failure.
+ */
+ bool db_failure;
+};
+
+
+/**
+ * Helper function for #postgres_get_recovery_meta_data().
+ * To be called with the results of a SELECT statement
+ * that has returned @a num_results results.
+ *
+ * @param cls closure of type `struct MetaIteratorContext *`
+ * @param result the postgres result
+ * @param num_results the number of results in @a result
+ */
+static void
+meta_iterator (void *cls,
+ PGresult *result,
+ unsigned int num_results)
+{
+ struct MetaIteratorContext *ctx = cls;
+
+ for (unsigned int i = 0; i<num_results; i++)
+ {
+ uint32_t version;
+ void *meta_data = NULL;
+ size_t meta_data_size = 0;
+ bool unused = false;
+ struct GNUNET_PQ_ResultSpec rs[] = {
+ GNUNET_PQ_result_spec_uint32 ("version",
+ &version),
+ GNUNET_PQ_result_spec_allow_null (
+ GNUNET_PQ_result_spec_variable_size ("recovery_meta_data",
+ &meta_data,
+ &meta_data_size),
+ &unused),
+ GNUNET_PQ_result_spec_end
+ };
+ enum GNUNET_GenericReturnValue ret;
+
+ if (GNUNET_OK !=
+ GNUNET_PQ_extract_result (result,
+ rs,
+ i))
+ {
+ GNUNET_break (0);
+ ctx->db_failure = true;
+ return;
+ }
+ ret = ctx->cb (ctx->cb_cls,
+ version,
+ meta_data,
+ meta_data_size);
+ GNUNET_PQ_cleanup_result (rs);
+ if (GNUNET_OK != ret)
+ break;
+ }
+}
+
+
+/**
+ * Fetch recovery document meta data for user. Returns
+ * meta data in descending order from @a max_version.
+ * The size of the result set may be limited.
+ *
+ * @param cls closure
+ * @param account_pub public key of the user's account
+ * @param max_version the maximum version number the user requests
+ * @param cb function to call on each result
+ * @param cb_cls closure for @a cb
+ * @return transaction status
+ */
+static enum GNUNET_DB_QueryStatus
+postgres_get_recovery_meta_data (
+ void *cls,
+ const struct ANASTASIS_CRYPTO_AccountPublicKeyP *account_pub,
+ uint32_t max_version,
+ ANASTASIS_DB_RecoveryMetaCallback cb,
+ void *cb_cls)
+{
+ struct PostgresClosure *pg = cls;
+ struct MetaIteratorContext ctx = {
+ .cb = cb,
+ .cb_cls = cb_cls
+ };
+ struct GNUNET_PQ_QueryParam params[] = {
+ GNUNET_PQ_query_param_auto_from_type (account_pub),
+ GNUNET_PQ_query_param_uint32 (&max_version),
+ GNUNET_PQ_query_param_end
+ };
+ enum GNUNET_DB_QueryStatus qs;
+
+ check_connection (pg);
+ qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
+ "recoverydocument_select_meta",
+ params,
+ &meta_iterator,
+ &ctx);
+ if (qs < 0)
+ return qs;
+ if (ctx.db_failure)
+ return GNUNET_DB_STATUS_HARD_ERROR;
+ return qs;
+}
+
+
+/**
* Fetch recovery document for user according given version.
*
* @param cls closure
@@ -2811,6 +2936,7 @@ libanastasis_plugin_db_postgres_init (void *cls)
plugin->get_escrow_challenge = &postgres_get_escrow_challenge;
plugin->get_key_share = &postgres_get_key_share;
plugin->get_latest_recovery_document = &postgres_get_latest_recovery_document;
+ plugin->get_recovery_meta_data = &postgres_get_recovery_meta_data;
plugin->get_recovery_document = &postgres_get_recovery_document;
plugin->lookup_account = &postgres_lookup_account;
plugin->check_payment_identifier = &postgres_check_payment_identifier;
diff --git a/src/stasis/stasis-0001.sql b/src/stasis/stasis-0001.sql
index de2762a..e3c9c5c 100644
--- a/src/stasis/stasis-0001.sql
+++ b/src/stasis/stasis-0001.sql
@@ -1,6 +1,6 @@
--
-- This file is part of Anastasis
--- Copyright (C) 2020, 2021 Anastasis SARL SA
+-- Copyright (C) 2020, 2021, 2022 Anastasis SARL SA
--
-- ANASTASIS is free software; you can redistribute it and/or modify it under the
-- terms of the GNU General Public License as published by the Free Software
@@ -140,6 +140,7 @@ CREATE TABLE IF NOT EXISTS anastasis_recoverydocument
account_sig BYTEA NOT NULL CHECK(LENGTH(account_sig)=64),
recovery_data_hash BYTEA NOT NULL CHECK(length(recovery_data_hash)=64),
recovery_data BYTEA NOT NULL,
+ recovery_meta_data BYTEA DEFAULT NULL,
PRIMARY KEY (user_id, version));
COMMENT ON TABLE anastasis_recoverydocument
IS 'Stores a recovery document which contains the policy and the encrypted core secret';
@@ -153,6 +154,8 @@ COMMENT ON COLUMN anastasis_recoverydocument.recovery_data_hash
IS 'Hash of the recovery document to prevent unnecessary uploads';
COMMENT ON COLUMN anastasis_recoverydocument.recovery_data
IS 'Contains the encrypted policy and core secret';
+COMMENT ON COLUMN anastasis_recoverydocument.recovery_meta_data
+ IS 'Contains an encrypted human-readable and sometimes user-generated description of the backup';
CREATE TABLE IF NOT EXISTS anastasis_challengecode