1 files changed, 79 insertions, 0 deletions
diff --git a/lib/crypto_backend/argon2_generic.c b/lib/crypto_backend/argon2_generic.c
new file mode 100644
index 0000000..d8a5b21
--- /dev/null
+++ b/lib/crypto_backend/argon2_generic.c
@@ -0,0 +1,79 @@
+/*
+ * Argon2 PBKDF2 library wrapper
+ *
+ * Copyright (C) 2016-2021 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2016-2021 Milan Broz
+ *
+ * This file is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This file is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this file; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <errno.h>
+#include "crypto_backend_internal.h"
+#if HAVE_ARGON2_H
+#include <argon2.h>
+#else
+#include "argon2/argon2.h"
+#endif
+
+#define CONST_CAST(x) (x)(uintptr_t)
+
+int argon2(const char *type, const char *password, size_t password_length,
+	   const char *salt, size_t salt_length,
+	   char *key, size_t key_length,
+	   uint32_t iterations, uint32_t memory, uint32_t parallel)
+{
+#if !USE_INTERNAL_ARGON2 && !HAVE_ARGON2_H
+	return -EINVAL;
+#else
+	argon2_type atype;
+	argon2_context context = {
+		.flags = ARGON2_DEFAULT_FLAGS,
+		.version = ARGON2_VERSION_NUMBER,
+		.t_cost = (uint32_t)iterations,
+		.m_cost = (uint32_t)memory,
+		.lanes = (uint32_t)parallel,
+		.threads = (uint32_t)parallel,
+		.out = (uint8_t *)key,
+		.outlen = (uint32_t)key_length,
+		.pwd = CONST_CAST(uint8_t *)password,
+		.pwdlen = (uint32_t)password_length,
+		.salt = CONST_CAST(uint8_t *)salt,
+		.saltlen = (uint32_t)salt_length,
+	};
+	int r;
+
+	if (!strcmp(type, "argon2i"))
+		atype = Argon2_i;
+	else if(!strcmp(type, "argon2id"))
+		atype = Argon2_id;
+	else
+		return -EINVAL;
+
+	switch (argon2_ctx(&context, atype)) {
+	case ARGON2_OK:
+		r = 0;
+		break;
+	case ARGON2_MEMORY_ALLOCATION_ERROR:
+	case ARGON2_FREE_MEMORY_CBK_NULL:
+	case ARGON2_ALLOCATE_MEMORY_CBK_NULL:
+		r = -ENOMEM;
+		break;
+	default:
+		r = -EINVAL;
+	}
+
+	return r;
+#endif
+}