aboutsummaryrefslogtreecommitdiff
path: root/vendor/mbedtls/poly1305.h
diff options
context:
space:
mode:
Diffstat (limited to 'vendor/mbedtls/poly1305.h')
-rw-r--r--vendor/mbedtls/poly1305.h168
1 files changed, 168 insertions, 0 deletions
diff --git a/vendor/mbedtls/poly1305.h b/vendor/mbedtls/poly1305.h
new file mode 100644
index 0000000..61bcaa6
--- /dev/null
+++ b/vendor/mbedtls/poly1305.h
@@ -0,0 +1,168 @@
+/**
+ * \file poly1305.h
+ *
+ * \brief This file contains Poly1305 definitions and functions.
+ *
+ * Poly1305 is a one-time message authenticator that can be used to
+ * authenticate messages. Poly1305-AES was created by Daniel
+ * Bernstein https://cr.yp.to/mac/poly1305-20050329.pdf The generic
+ * Poly1305 algorithm (not tied to AES) was also standardized in RFC
+ * 7539.
+ *
+ * \author Daniel King <damaki.gh@gmail.com>
+ */
+
+/*
+ * Copyright The Mbed TLS Contributors
+ * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+
+#ifndef MBEDTLS_POLY1305_H
+#define MBEDTLS_POLY1305_H
+#include "mbedtls/private_access.h"
+
+#include "mbedtls/build_info.h"
+
+#include <stdint.h>
+#include <stddef.h>
+
+/** Invalid input parameter(s). */
+#define MBEDTLS_ERR_POLY1305_BAD_INPUT_DATA -0x0057
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if !defined(MBEDTLS_POLY1305_ALT)
+
+typedef struct mbedtls_poly1305_context {
+ uint32_t MBEDTLS_PRIVATE(r)[4]; /** The value for 'r' (low 128 bits of the key). */
+ uint32_t MBEDTLS_PRIVATE(s)[4]; /** The value for 's' (high 128 bits of the key). */
+ uint32_t MBEDTLS_PRIVATE(acc)[5]; /** The accumulator number. */
+ uint8_t MBEDTLS_PRIVATE(queue)[16]; /** The current partial block of data. */
+ size_t MBEDTLS_PRIVATE(queue_len); /** The number of bytes stored in 'queue'. */
+}
+mbedtls_poly1305_context;
+
+#else /* MBEDTLS_POLY1305_ALT */
+#include "poly1305_alt.h"
+#endif /* MBEDTLS_POLY1305_ALT */
+
+/**
+ * \brief This function initializes the specified Poly1305 context.
+ *
+ * It must be the first API called before using
+ * the context.
+ *
+ * It is usually followed by a call to
+ * \c mbedtls_poly1305_starts(), then one or more calls to
+ * \c mbedtls_poly1305_update(), then one call to
+ * \c mbedtls_poly1305_finish(), then finally
+ * \c mbedtls_poly1305_free().
+ *
+ * \param ctx The Poly1305 context to initialize. This must
+ * not be \c NULL.
+ */
+void mbedtls_poly1305_init(mbedtls_poly1305_context *ctx);
+
+/**
+ * \brief This function releases and clears the specified
+ * Poly1305 context.
+ *
+ * \param ctx The Poly1305 context to clear. This may be \c NULL, in which
+ * case this function is a no-op. If it is not \c NULL, it must
+ * point to an initialized Poly1305 context.
+ */
+void mbedtls_poly1305_free(mbedtls_poly1305_context *ctx);
+
+/**
+ * \brief This function sets the one-time authentication key.
+ *
+ * \warning The key must be unique and unpredictable for each
+ * invocation of Poly1305.
+ *
+ * \param ctx The Poly1305 context to which the key should be bound.
+ * This must be initialized.
+ * \param key The buffer containing the \c 32 Byte (\c 256 Bit) key.
+ *
+ * \return \c 0 on success.
+ * \return A negative error code on failure.
+ */
+int mbedtls_poly1305_starts(mbedtls_poly1305_context *ctx,
+ const unsigned char key[32]);
+
+/**
+ * \brief This functions feeds an input buffer into an ongoing
+ * Poly1305 computation.
+ *
+ * It is called between \c mbedtls_cipher_poly1305_starts() and
+ * \c mbedtls_cipher_poly1305_finish().
+ * It can be called repeatedly to process a stream of data.
+ *
+ * \param ctx The Poly1305 context to use for the Poly1305 operation.
+ * This must be initialized and bound to a key.
+ * \param ilen The length of the input data in Bytes.
+ * Any value is accepted.
+ * \param input The buffer holding the input data.
+ * This pointer can be \c NULL if `ilen == 0`.
+ *
+ * \return \c 0 on success.
+ * \return A negative error code on failure.
+ */
+int mbedtls_poly1305_update(mbedtls_poly1305_context *ctx,
+ const unsigned char *input,
+ size_t ilen);
+
+/**
+ * \brief This function generates the Poly1305 Message
+ * Authentication Code (MAC).
+ *
+ * \param ctx The Poly1305 context to use for the Poly1305 operation.
+ * This must be initialized and bound to a key.
+ * \param mac The buffer to where the MAC is written. This must
+ * be a writable buffer of length \c 16 Bytes.
+ *
+ * \return \c 0 on success.
+ * \return A negative error code on failure.
+ */
+int mbedtls_poly1305_finish(mbedtls_poly1305_context *ctx,
+ unsigned char mac[16]);
+
+/**
+ * \brief This function calculates the Poly1305 MAC of the input
+ * buffer with the provided key.
+ *
+ * \warning The key must be unique and unpredictable for each
+ * invocation of Poly1305.
+ *
+ * \param key The buffer containing the \c 32 Byte (\c 256 Bit) key.
+ * \param ilen The length of the input data in Bytes.
+ * Any value is accepted.
+ * \param input The buffer holding the input data.
+ * This pointer can be \c NULL if `ilen == 0`.
+ * \param mac The buffer to where the MAC is written. This must be
+ * a writable buffer of length \c 16 Bytes.
+ *
+ * \return \c 0 on success.
+ * \return A negative error code on failure.
+ */
+int mbedtls_poly1305_mac(const unsigned char key[32],
+ const unsigned char *input,
+ size_t ilen,
+ unsigned char mac[16]);
+
+#if defined(MBEDTLS_SELF_TEST)
+/**
+ * \brief The Poly1305 checkup routine.
+ *
+ * \return \c 0 on success.
+ * \return \c 1 on failure.
+ */
+int mbedtls_poly1305_self_test(int verbose);
+#endif /* MBEDTLS_SELF_TEST */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MBEDTLS_POLY1305_H */