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- /* Copyright (c) 2001, Matej Pfajfar.
- * Copyright (c) 2001-2004, Roger Dingledine.
- * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
- * Copyright (c) 2007-2019, The Tor Project, Inc. */
- /* See LICENSE for licensing information */
- /**
- * \file crypto_dh.h
- *
- * \brief Headers for crypto_dh.c
- **/
- #ifndef TOR_CRYPTO_DH_H
- #define TOR_CRYPTO_DH_H
- #include "orconfig.h"
- #include "lib/cc/torint.h"
- #include "lib/defs/dh_sizes.h"
- typedef struct crypto_dh_t crypto_dh_t;
- extern const unsigned DH_GENERATOR;
- extern const char TLS_DH_PRIME[];
- extern const char OAKLEY_PRIME_2[];
- /* Key negotiation */
- #define DH_TYPE_CIRCUIT 1
- #define DH_TYPE_REND 2
- #define DH_TYPE_TLS 3
- void crypto_dh_init(void);
- crypto_dh_t *crypto_dh_new(int dh_type);
- crypto_dh_t *crypto_dh_dup(const crypto_dh_t *dh);
- int crypto_dh_get_bytes(crypto_dh_t *dh);
- int crypto_dh_generate_public(crypto_dh_t *dh);
- int crypto_dh_get_public(crypto_dh_t *dh, char *pubkey_out,
- size_t pubkey_out_len);
- ssize_t crypto_dh_compute_secret(int severity, crypto_dh_t *dh,
- const char *pubkey, size_t pubkey_len,
- char *secret_out, size_t secret_out_len);
- void crypto_dh_free_(crypto_dh_t *dh);
- #define crypto_dh_free(dh) FREE_AND_NULL(crypto_dh_t, crypto_dh_free_, (dh))
- ssize_t crypto_dh_handshake(int severity, crypto_dh_t *dh,
- const char *pubkey, size_t pubkey_len,
- unsigned char *secret_out,
- size_t secret_bytes_out);
- void crypto_dh_free_all(void);
- /* Prototypes for private functions only used by tortls.c, crypto.c, and the
- * unit tests. */
- struct dh_st;
- struct dh_st *crypto_dh_new_openssl_tls(void);
- #ifdef ENABLE_OPENSSL
- void crypto_dh_init_openssl(void);
- void crypto_dh_free_all_openssl(void);
- #endif
- #ifdef ENABLE_NSS
- void crypto_dh_init_nss(void);
- void crypto_dh_free_all_nss(void);
- #endif
- #endif /* !defined(TOR_CRYPTO_DH_H) */
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