1 files changed, 49 insertions, 0 deletions
diff --git a/sys/contrib/libsodium/src/libsodium/crypto_kdf/crypto_kdf.c b/sys/contrib/libsodium/src/libsodium/crypto_kdf/crypto_kdf.c
new file mode 100644
index 000000000000..b215d99ae628
--- /dev/null
+++ b/sys/contrib/libsodium/src/libsodium/crypto_kdf/crypto_kdf.c
@@ -0,0 +1,49 @@
+
+#include "crypto_kdf.h"
+#include "randombytes.h"
+
+const char *
+crypto_kdf_primitive(void)
+{
+    return crypto_kdf_PRIMITIVE;
+}
+
+size_t
+crypto_kdf_bytes_min(void)
+{
+    return crypto_kdf_BYTES_MIN;
+}
+
+size_t
+crypto_kdf_bytes_max(void)
+{
+    return crypto_kdf_BYTES_MAX;
+}
+
+size_t
+crypto_kdf_contextbytes(void)
+{
+    return crypto_kdf_CONTEXTBYTES;
+}
+
+size_t
+crypto_kdf_keybytes(void)
+{
+    return crypto_kdf_KEYBYTES;
+}
+
+int
+crypto_kdf_derive_from_key(unsigned char *subkey, size_t subkey_len,
+                           uint64_t subkey_id,
+                           const char ctx[crypto_kdf_CONTEXTBYTES],
+                           const unsigned char key[crypto_kdf_KEYBYTES])
+{
+    return crypto_kdf_blake2b_derive_from_key(subkey, subkey_len,
+                                              subkey_id, ctx, key);
+}
+
+void
+crypto_kdf_keygen(unsigned char k[crypto_kdf_KEYBYTES])
+{
+    randombytes_buf(k, crypto_kdf_KEYBYTES);
+}