Add external account secret store API

src/agents/collector/external-accounts.sql

@@ -1,5 +1,13 @@
 PRAGMA foreign_keys = ON;
 
+CREATE TABLE IF NOT EXISTS external_account_secrets (
+    id TEXT PRIMARY KEY,
+    owner TEXT NOT NULL,
+    secret TEXT NOT NULL,
+    created_at INTEGER NOT NULL,
+    updated_at INTEGER NOT NULL
+);
+
 CREATE TABLE IF NOT EXISTS external_accounts (
     id INTEGER PRIMARY KEY,
     owner TEXT NOT NULL,

src/agents/collector/external_accounts.c

@@ -152,3 +152,60 @@ CollectorAccountsMarkResult(sqlite3 *database, sqlite3_int64 id, long now,
     sqlite3_finalize(statement);
     return result ? 0 : -1;
 }
+
+int
+CollectorAccountsSecretSet(sqlite3 *database, const char *id,
+                           const char *owner, const char *secret, long now)
+{
+    sqlite3_stmt *statement = NULL;
+    const char query[] = "INSERT INTO external_account_secrets "
+        "(id, owner, secret, created_at, updated_at) VALUES (?, ?, ?, ?, ?) "
+        "ON CONFLICT(id) DO UPDATE SET owner=excluded.owner, secret=excluded.secret, "
+        "updated_at=excluded.updated_at";
+    int result;
+    if (database == NULL || id == NULL || owner == NULL || secret == NULL ||
+        sqlite3_prepare_v2(database, query, -1, &statement, NULL) != SQLITE_OK) return -1;
+    sqlite3_bind_text(statement, 1, id, -1, SQLITE_TRANSIENT);
+    sqlite3_bind_text(statement, 2, owner, -1, SQLITE_TRANSIENT);
+    sqlite3_bind_text(statement, 3, secret, -1, SQLITE_TRANSIENT);
+    sqlite3_bind_int64(statement, 4, (sqlite3_int64) now);
+    sqlite3_bind_int64(statement, 5, (sqlite3_int64) now);
+    result = sqlite3_step(statement) == SQLITE_DONE ? 0 : -1;
+    sqlite3_finalize(statement);
+    return result;
+}
+
+int
+CollectorAccountsSecretGet(sqlite3 *database, const char *id,
+                           char *secret, size_t secret_size)
+{
+    sqlite3_stmt *statement = NULL;
+    const char query[] = "SELECT secret FROM external_account_secrets WHERE id = ?";
+    int result;
+    if (database == NULL || id == NULL || secret == NULL || secret_size == 0 ||
+        sqlite3_prepare_v2(database, query, -1, &statement, NULL) != SQLITE_OK) return -1;
+    secret[0] = '\0';
+    sqlite3_bind_text(statement, 1, id, -1, SQLITE_TRANSIENT);
+    result = sqlite3_step(statement);
+    if (result == SQLITE_ROW) {
+        const char *value = (const char *) sqlite3_column_text(statement, 0);
+        if (value == NULL || snprintf(secret, secret_size, "%s", value) >= (int) secret_size) result = -1;
+        else result = 1;
+    } else if (result == SQLITE_DONE) result = 0;
+    else result = -1;
+    sqlite3_finalize(statement);
+    return result;
+}
+
+int
+CollectorAccountsSecretDelete(sqlite3 *database, const char *id)
+{
+    sqlite3_stmt *statement = NULL;
+    const char query[] = "DELETE FROM external_account_secrets WHERE id = ?";
+    int result;
+    if (database == NULL || id == NULL || sqlite3_prepare_v2(database, query, -1, &statement, NULL) != SQLITE_OK) return -1;
+    sqlite3_bind_text(statement, 1, id, -1, SQLITE_TRANSIENT);
+    result = sqlite3_step(statement) == SQLITE_DONE ? 0 : -1;
+    sqlite3_finalize(statement);
+    return result;
+}

src/agents/collector/external_accounts.h

@@ -26,5 +26,10 @@ int CollectorAccountsNextDue(sqlite3 *database, long now,
                              CollectorExternalAccount *account);
 int CollectorAccountsMarkResult(sqlite3 *database, sqlite3_int64 id,
                                 long now, int success, const char *error);
+int CollectorAccountsSecretSet(sqlite3 *database, const char *id,
+                               const char *owner, const char *secret, long now);
+int CollectorAccountsSecretGet(sqlite3 *database, const char *id,
+                               char *secret, size_t secret_size);
+int CollectorAccountsSecretDelete(sqlite3 *database, const char *id);
 
 #endif