1 files changed, 30 insertions, 0 deletions
diff --git a/libar2_string_to_type.c b/libar2_string_to_type.c
new file mode 100644
index 0000000..98db6a8
--- /dev/null
+++ b/libar2_string_to_type.c
@@ -0,0 +1,30 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+int
+libar2_string_to_type(const char *str, enum libar2_argon2_type *typep)
+{
+#define STRSTARTS(A, B) (!strncmp(A, B, sizeof(B) - 1))
+
+	if (!strcasecmp(str, "argon2d") || STRSTARTS(str, "argon2d$")) {
+		*typep = LIBAR2_ARGON2D;
+		return 0;
+
+	} else if (!strcasecmp(str, "argon2i") || STRSTARTS(str, "argon2i$")) {
+		*typep = LIBAR2_ARGON2I;
+		return 0;
+
+	} else if (!strcasecmp(str, "argon2id") || STRSTARTS(str, "argon2id$")) {
+		*typep = LIBAR2_ARGON2ID;
+		return 0;
+
+	} else if (!strcasecmp(str, "argon2ds") || STRSTARTS(str, "argon2ds$")) {
+		*typep = LIBAR2_ARGON2DS;
+		return 0;
+
+	} else {
+		errno = EINVAL;
+		return -1;
+	}
+}