move asn.1 helper functions to asn1helpers.[ch]
diff --git a/src/asn1helpers.h b/src/asn1helpers.h
new file mode 100644
index 0000000..3861d13
--- /dev/null
+++ b/src/asn1helpers.h
@@ -0,0 +1,29 @@
+#pragma once
+
+#include <asn1defs.h>
+
+static inline uint16_t asn1str_to_u16(ASN1String *as)
+{
+ if (as->len < 2)
+ return 0;
+ else
+ return *(uint16_t *)as->buf;
+}
+
+static inline uint8_t asn1str_to_u8(ASN1String *as)
+{
+ if (as->len < 1)
+ return 0;
+ else
+ return *(uint8_t *)as->buf;
+}
+
+static inline uint8_t asn1bitstr_to_u32(ASN1BitString *as)
+{
+ if (as->len < 25)
+ return 0;
+ else
+ return *(uint32_t *)as->buf;
+}
+
+int asn1_strncpy(char *out, const ASN1String *in, size_t n);