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);