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Diffstat (limited to 'include/mbedtls/ecjpake.h')
| -rw-r--r-- | include/mbedtls/ecjpake.h | 298 |
1 files changed, 0 insertions, 298 deletions
diff --git a/include/mbedtls/ecjpake.h b/include/mbedtls/ecjpake.h deleted file mode 100644 index c2148a2..0000000 --- a/include/mbedtls/ecjpake.h +++ /dev/null @@ -1,298 +0,0 @@ -/** - * \file ecjpake.h - * - * \brief Elliptic curve J-PAKE - */ -/* - * Copyright The Mbed TLS Contributors - * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later - */ -#ifndef MBEDTLS_ECJPAKE_H -#define MBEDTLS_ECJPAKE_H -#include "mbedtls/private_access.h" - -/* - * J-PAKE is a password-authenticated key exchange that allows deriving a - * strong shared secret from a (potentially low entropy) pre-shared - * passphrase, with forward secrecy and mutual authentication. - * https://en.wikipedia.org/wiki/Password_Authenticated_Key_Exchange_by_Juggling - * - * This file implements the Elliptic Curve variant of J-PAKE, - * as defined in Chapter 7.4 of the Thread v1.0 Specification, - * available to members of the Thread Group http://threadgroup.org/ - * - * As the J-PAKE algorithm is inherently symmetric, so is our API. - * Each party needs to send its first round message, in any order, to the - * other party, then each sends its second round message, in any order. - * The payloads are serialized in a way suitable for use in TLS, but could - * also be use outside TLS. - */ -#include "mbedtls/build_info.h" - -#include "mbedtls/ecp.h" -#include "mbedtls/md.h" - -#ifdef __cplusplus -extern "C" { -#endif - -/** - * Roles in the EC J-PAKE exchange - */ -typedef enum { - MBEDTLS_ECJPAKE_CLIENT = 0, /**< Client */ - MBEDTLS_ECJPAKE_SERVER, /**< Server */ - MBEDTLS_ECJPAKE_NONE, /**< Undefined */ -} mbedtls_ecjpake_role; - -#if !defined(MBEDTLS_ECJPAKE_ALT) -/** - * EC J-PAKE context structure. - * - * J-PAKE is a symmetric protocol, except for the identifiers used in - * Zero-Knowledge Proofs, and the serialization of the second message - * (KeyExchange) as defined by the Thread spec. - * - * In order to benefit from this symmetry, we choose a different naming - * convention from the Thread v1.0 spec. Correspondence is indicated in the - * description as a pair C: client name, S: server name - */ -typedef struct mbedtls_ecjpake_context { - mbedtls_md_type_t MBEDTLS_PRIVATE(md_type); /**< Hash to use */ - mbedtls_ecp_group MBEDTLS_PRIVATE(grp); /**< Elliptic curve */ - mbedtls_ecjpake_role MBEDTLS_PRIVATE(role); /**< Are we client or server? */ - int MBEDTLS_PRIVATE(point_format); /**< Format for point export */ - - mbedtls_ecp_point MBEDTLS_PRIVATE(Xm1); /**< My public key 1 C: X1, S: X3 */ - mbedtls_ecp_point MBEDTLS_PRIVATE(Xm2); /**< My public key 2 C: X2, S: X4 */ - mbedtls_ecp_point MBEDTLS_PRIVATE(Xp1); /**< Peer public key 1 C: X3, S: X1 */ - mbedtls_ecp_point MBEDTLS_PRIVATE(Xp2); /**< Peer public key 2 C: X4, S: X2 */ - mbedtls_ecp_point MBEDTLS_PRIVATE(Xp); /**< Peer public key C: Xs, S: Xc */ - - mbedtls_mpi MBEDTLS_PRIVATE(xm1); /**< My private key 1 C: x1, S: x3 */ - mbedtls_mpi MBEDTLS_PRIVATE(xm2); /**< My private key 2 C: x2, S: x4 */ - - mbedtls_mpi MBEDTLS_PRIVATE(s); /**< Pre-shared secret (passphrase) */ -} mbedtls_ecjpake_context; - -#else /* MBEDTLS_ECJPAKE_ALT */ -#include "ecjpake_alt.h" -#endif /* MBEDTLS_ECJPAKE_ALT */ - -/** - * \brief Initialize an ECJPAKE context. - * - * \param ctx The ECJPAKE context to initialize. - * This must not be \c NULL. - */ -void mbedtls_ecjpake_init(mbedtls_ecjpake_context *ctx); - -/** - * \brief Set up an ECJPAKE context for use. - * - * \note Currently the only values for hash/curve allowed by the - * standard are #MBEDTLS_MD_SHA256/#MBEDTLS_ECP_DP_SECP256R1. - * - * \param ctx The ECJPAKE context to set up. This must be initialized. - * \param role The role of the caller. This must be either - * #MBEDTLS_ECJPAKE_CLIENT or #MBEDTLS_ECJPAKE_SERVER. - * \param hash The identifier of the hash function to use, - * for example #MBEDTLS_MD_SHA256. - * \param curve The identifier of the elliptic curve to use, - * for example #MBEDTLS_ECP_DP_SECP256R1. - * \param secret The pre-shared secret (passphrase). This must be - * a readable not empty buffer of length \p len Bytes. It need - * only be valid for the duration of this call. - * \param len The length of the pre-shared secret \p secret. - * - * \return \c 0 if successful. - * \return A negative error code on failure. - */ -int mbedtls_ecjpake_setup(mbedtls_ecjpake_context *ctx, - mbedtls_ecjpake_role role, - mbedtls_md_type_t hash, - mbedtls_ecp_group_id curve, - const unsigned char *secret, - size_t len); - -/** - * \brief Set the point format for future reads and writes. - * - * \param ctx The ECJPAKE context to configure. - * \param point_format The point format to use: - * #MBEDTLS_ECP_PF_UNCOMPRESSED (default) - * or #MBEDTLS_ECP_PF_COMPRESSED. - * - * \return \c 0 if successful. - * \return #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if \p point_format - * is invalid. - */ -int mbedtls_ecjpake_set_point_format(mbedtls_ecjpake_context *ctx, - int point_format); - -/** - * \brief Check if an ECJPAKE context is ready for use. - * - * \param ctx The ECJPAKE context to check. This must be - * initialized. - * - * \return \c 0 if the context is ready for use. - * \return #MBEDTLS_ERR_ECP_BAD_INPUT_DATA otherwise. - */ -int mbedtls_ecjpake_check(const mbedtls_ecjpake_context *ctx); - -/** - * \brief Generate and write the first round message - * (TLS: contents of the Client/ServerHello extension, - * excluding extension type and length bytes). - * - * \param ctx The ECJPAKE context to use. This must be - * initialized and set up. - * \param buf The buffer to write the contents to. This must be a - * writable buffer of length \p len Bytes. - * \param len The length of \p buf in Bytes. - * \param olen The address at which to store the total number - * of Bytes written to \p buf. This must not be \c NULL. - * \param f_rng The RNG function to use. This must not be \c NULL. - * \param p_rng The RNG parameter to be passed to \p f_rng. This - * may be \c NULL if \p f_rng doesn't use a context. - * - * \return \c 0 if successful. - * \return A negative error code on failure. - */ -int mbedtls_ecjpake_write_round_one(mbedtls_ecjpake_context *ctx, - unsigned char *buf, size_t len, size_t *olen, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng); - -/** - * \brief Read and process the first round message - * (TLS: contents of the Client/ServerHello extension, - * excluding extension type and length bytes). - * - * \param ctx The ECJPAKE context to use. This must be initialized - * and set up. - * \param buf The buffer holding the first round message. This must - * be a readable buffer of length \p len Bytes. - * \param len The length in Bytes of \p buf. - * - * \return \c 0 if successful. - * \return A negative error code on failure. - */ -int mbedtls_ecjpake_read_round_one(mbedtls_ecjpake_context *ctx, - const unsigned char *buf, - size_t len); - -/** - * \brief Generate and write the second round message - * (TLS: contents of the Client/ServerKeyExchange). - * - * \param ctx The ECJPAKE context to use. This must be initialized, - * set up, and already have performed round one. - * \param buf The buffer to write the round two contents to. - * This must be a writable buffer of length \p len Bytes. - * \param len The size of \p buf in Bytes. - * \param olen The address at which to store the total number of Bytes - * written to \p buf. This must not be \c NULL. - * \param f_rng The RNG function to use. This must not be \c NULL. - * \param p_rng The RNG parameter to be passed to \p f_rng. This - * may be \c NULL if \p f_rng doesn't use a context. - * - * \return \c 0 if successful. - * \return A negative error code on failure. - */ -int mbedtls_ecjpake_write_round_two(mbedtls_ecjpake_context *ctx, - unsigned char *buf, size_t len, size_t *olen, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng); - -/** - * \brief Read and process the second round message - * (TLS: contents of the Client/ServerKeyExchange). - * - * \param ctx The ECJPAKE context to use. This must be initialized - * and set up and already have performed round one. - * \param buf The buffer holding the second round message. This must - * be a readable buffer of length \p len Bytes. - * \param len The length in Bytes of \p buf. - * - * \return \c 0 if successful. - * \return A negative error code on failure. - */ -int mbedtls_ecjpake_read_round_two(mbedtls_ecjpake_context *ctx, - const unsigned char *buf, - size_t len); - -/** - * \brief Derive the shared secret - * (TLS: Pre-Master Secret). - * - * \param ctx The ECJPAKE context to use. This must be initialized, - * set up and have performed both round one and two. - * \param buf The buffer to write the derived secret to. This must - * be a writable buffer of length \p len Bytes. - * \param len The length of \p buf in Bytes. - * \param olen The address at which to store the total number of Bytes - * written to \p buf. This must not be \c NULL. - * \param f_rng The RNG function to use. This must not be \c NULL. - * \param p_rng The RNG parameter to be passed to \p f_rng. This - * may be \c NULL if \p f_rng doesn't use a context. - * - * \return \c 0 if successful. - * \return A negative error code on failure. - */ -int mbedtls_ecjpake_derive_secret(mbedtls_ecjpake_context *ctx, - unsigned char *buf, size_t len, size_t *olen, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng); - -/** - * \brief Write the shared key material to be passed to a Key - * Derivation Function as described in RFC8236. - * - * \param ctx The ECJPAKE context to use. This must be initialized, - * set up and have performed both round one and two. - * \param buf The buffer to write the derived secret to. This must - * be a writable buffer of length \p len Bytes. - * \param len The length of \p buf in Bytes. - * \param olen The address at which to store the total number of bytes - * written to \p buf. This must not be \c NULL. - * \param f_rng The RNG function to use. This must not be \c NULL. - * \param p_rng The RNG parameter to be passed to \p f_rng. This - * may be \c NULL if \p f_rng doesn't use a context. - * - * \return \c 0 if successful. - * \return A negative error code on failure. - */ -int mbedtls_ecjpake_write_shared_key(mbedtls_ecjpake_context *ctx, - unsigned char *buf, size_t len, size_t *olen, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng); - -/** - * \brief This clears an ECJPAKE context and frees any - * embedded data structure. - * - * \param ctx The ECJPAKE context to free. This may be \c NULL, - * in which case this function does nothing. If it is not - * \c NULL, it must point to an initialized ECJPAKE context. - */ -void mbedtls_ecjpake_free(mbedtls_ecjpake_context *ctx); - -#if defined(MBEDTLS_SELF_TEST) - -/** - * \brief Checkup routine - * - * \return 0 if successful, or 1 if a test failed - */ -int mbedtls_ecjpake_self_test(int verbose); - -#endif /* MBEDTLS_SELF_TEST */ - -#ifdef __cplusplus -} -#endif - - -#endif /* ecjpake.h */ |