1 files changed, 19 insertions, 0 deletions
diff --git a/include/crypto/poly1305.h b/include/crypto/poly1305.h
index 46f834e231..a73c2311d4 100644
--- a/include/crypto/poly1305.h
+++ b/include/crypto/poly1305.h
@@ -15,6 +15,25 @@
 
 typedef struct poly1305_context POLY1305;
 
+typedef void (*poly1305_blocks_f) (void *ctx, const unsigned char *inp,
+                                   size_t len, unsigned int padbit);
+typedef void (*poly1305_emit_f) (void *ctx, unsigned char mac[16],
+                                 const unsigned int nonce[4]);
+
+struct poly1305_context {
+    double opaque[24];  /* large enough to hold internal state, declared
+                         * 'double' to ensure at least 64-bit invariant
+                         * alignment across all platforms and
+                         * configurations */
+    unsigned int nonce[4];
+    unsigned char data[POLY1305_BLOCK_SIZE];
+    size_t num;
+    struct {
+        poly1305_blocks_f blocks;
+        poly1305_emit_f emit;
+    } func;
+};
+
 size_t Poly1305_ctx_size(void);
 void Poly1305_Init(POLY1305 *ctx, const unsigned char key[32]);
 void Poly1305_Update(POLY1305 *ctx, const unsigned char *inp, size_t len);