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Improve error handling around the sqlite3 library #136

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Feb 14, 2024
Merged

Improve error handling around the sqlite3 library #136

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09497f1
Improve error handling around the sqlite3 library
bbockelm Feb 11, 2024
ac93e2d
Small whitespace fix by linter
bbockelm Feb 12, 2024
cf5b5cc
Small whitespace fix by linter
bbockelm Feb 12, 2024
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65 changes: 48 additions & 17 deletions src/scitokens_cache.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -95,38 +95,53 @@ std::string get_cache_file() {
return keycache_file;
}

void remove_issuer_entry(sqlite3 *db, const std::string &issuer,
// Remove a given issuer from the database. Starts a new transaction
// if `new_transaction` is true.
// If a failure occurs, then this function returns nonzero and closes
// the database handle.
int remove_issuer_entry(sqlite3 *db, const std::string &issuer,
bool new_transaction) {
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if (new_transaction)
sqlite3_exec(db, "BEGIN", 0, 0, 0);
int rc;
if (new_transaction) {
if ((rc = sqlite3_exec(db, "BEGIN", 0, 0, 0)) != SQLITE_OK) {
sqlite3_close(db);
return -1;
}
}

sqlite3_stmt *stmt;
int rc = sqlite3_prepare_v2(db, "DELETE FROM keycache WHERE issuer = ?", -1,
rc = sqlite3_prepare_v2(db, "DELETE FROM keycache WHERE issuer = ?", -1,
&stmt, NULL);
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if (rc != SQLITE_OK) {
sqlite3_close(db);
return;
return -1;
}

if (sqlite3_bind_text(stmt, 1, issuer.c_str(), issuer.size(),
SQLITE_STATIC) != SQLITE_OK) {
sqlite3_finalize(stmt);
sqlite3_close(db);
return;
return -1;
}

rc = sqlite3_step(stmt);
if (rc != SQLITE_DONE) {
sqlite3_finalize(stmt);
sqlite3_close(db);
return;
return -1;
}

sqlite3_finalize(stmt);

if (new_transaction)
sqlite3_exec(db, "COMMIT", 0, 0, 0);
if (new_transaction) {
if ((rc = sqlite3_exec(db, "COMMIT", 0, 0, 0)) != SQLITE_OK) {
sqlite3_close(db);
return -1;
}
}

return 0;
}

} // namespace
Expand Down Expand Up @@ -170,27 +185,35 @@ bool scitokens::Validator::get_public_keys_from_db(const std::string issuer,
picojson::value json_obj;
auto err = picojson::parse(json_obj, metadata);
if (!err.empty() || !json_obj.is<picojson::object>()) {
remove_issuer_entry(db, issuer, true);
if (remove_issuer_entry(db, issuer, true) != 0) {
return false;
}
sqlite3_close(db);
return false;
}
auto top_obj = json_obj.get<picojson::object>();
auto iter = top_obj.find("jwks");
if (iter == top_obj.end() || !iter->second.is<picojson::object>()) {
remove_issuer_entry(db, issuer, true);
if (remove_issuer_entry(db, issuer, true) != 0) {
return false;
}
sqlite3_close(db);
return false;
}
auto keys_local = iter->second;
iter = top_obj.find("expires");
if (iter == top_obj.end() || !iter->second.is<int64_t>()) {
remove_issuer_entry(db, issuer, true);
if (remove_issuer_entry(db, issuer, true) != 0) {
return false;
}
sqlite3_close(db);
return false;
}
auto expiry = iter->second.get<int64_t>();
if (now > expiry) {
remove_issuer_entry(db, issuer, true);
if (remove_issuer_entry(db, issuer, true) != 0) {
return false;
}
sqlite3_close(db);
return false;
}
Expand Down Expand Up @@ -238,9 +261,14 @@ bool scitokens::Validator::store_public_keys(const std::string &issuer,
return false;
}

sqlite3_exec(db, "BEGIN", 0, 0, 0);
if ((rc = sqlite3_exec(db, "BEGIN", 0, 0, 0)) != SQLITE_OK) {
sqlite3_close(db);
return false;
}

remove_issuer_entry(db, issuer, false);
if (remove_issuer_entry(db, issuer, false) != 0) {
return false;
}

sqlite3_stmt *stmt;
rc = sqlite3_prepare_v2(db, "INSERT INTO keycache VALUES (?, ?)", -1, &stmt,
Expand Down Expand Up @@ -270,10 +298,13 @@ bool scitokens::Validator::store_public_keys(const std::string &issuer,
sqlite3_close(db);
return false;
}
sqlite3_finalize(stmt);

sqlite3_exec(db, "COMMIT", 0, 0, 0);
if (sqlite3_exec(db, "COMMIT", 0, 0, 0) != SQLITE_OK) {
sqlite3_close(db);
return false;
}

sqlite3_finalize(stmt);
sqlite3_close(db);
return true;
}
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