1 files changed, 48 insertions, 0 deletions
diff --git a/nist/encrypt.c b/nist/encrypt.c
new file mode 100644
index 0000000..a33a2f5
--- /dev/null
+++ b/nist/encrypt.c
@@ -0,0 +1,48 @@
+#include <stdbool.h>
+
+#include "crypto_aead.h"
+#include "lilliput-ae.h"
+
+
+int crypto_aead_encrypt(
+    unsigned char *c, unsigned long long *clen,
+    const unsigned char *m, unsigned long long mlen,
+    const unsigned char *ad, unsigned long long adlen,
+    const unsigned char *nsec,
+    const unsigned char *npub,
+    const unsigned char *k
+)
+{
+    (void)nsec;
+
+    lilliput_ae_encrypt(mlen, m, adlen, ad, k, npub, c, c+mlen);
+    *clen = mlen + TAG_BYTES;
+
+    return 0;
+}
+
+
+int crypto_aead_decrypt(
+    unsigned char *m, unsigned long long *mlen,
+    unsigned char *nsec,
+    const unsigned char *c, unsigned long long clen,
+    const unsigned char *ad, unsigned long long adlen,
+    const unsigned char *npub,
+    const unsigned char *k
+)
+{
+    (void)nsec;
+
+    size_t tagless_len = clen-TAG_BYTES;
+
+    bool valid = lilliput_ae_decrypt(
+        tagless_len, c, adlen, ad, k, npub, c+tagless_len, m
+    );
+
+    if (!valid)
+        return 1;
+
+    *mlen = tagless_len;
+
+    return 0;
+}