Add support for encrypted storage.

[meshlink] / src / chacha-poly1305 / chacha.c

diff --git a/src/chacha-poly1305/chacha.c b/src/chacha-poly1305/chacha.c
index 2d0b9183dde4258dd0d20a4492aa19b7aee72776..a158de5efafa6266cc46ee2473aba6aca0f7352f 100644 (file)
--- a/src/chacha-poly1305/chacha.c
+++ b/src/chacha-poly1305/chacha.c
@@ -79,6 +79,14 @@ void chacha_ivsetup(chacha_ctx *x, const uint8_t *iv, const uint8_t *counter)
        x->input[15] = U8TO32_LITTLE(iv + 4);
 }
 
+void chacha_ivsetup_96(chacha_ctx *x, const uint8_t *iv, const uint8_t *counter)
+{
+       x->input[12] = counter == NULL ? 0 : U8TO32_LITTLE(counter + 0);
+       x->input[13] = U8TO32_LITTLE(iv + 0);
+       x->input[14] = U8TO32_LITTLE(iv + 4);
+       x->input[15] = U8TO32_LITTLE(iv + 8);
+}
+
 void
 chacha_encrypt_bytes(chacha_ctx *x, const uint8_t *m, uint8_t *c, uint32_t bytes)
 {