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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 */
- #ifndef RELAY_CRYPTO_ST_H
- #define RELAY_CRYPTO_ST_H
- #define crypto_cipher_t aes_cnt_cipher
- struct crypto_cipher_t;
- struct crypto_digest_t;
- struct relay_crypto_t {
- /* crypto environments */
- /** Encryption key and counter for cells heading towards the OR at this
- * step. */
- struct crypto_cipher_t *f_crypto;
- /** Encryption key and counter for cells heading back from the OR at this
- * step. */
- struct crypto_cipher_t *b_crypto;
- /** Digest state for cells heading towards the OR at this step. */
- struct crypto_digest_t *f_digest; /* for integrity checking */
- /** Digest state for cells heading away from the OR at this step. */
- struct crypto_digest_t *b_digest;
- /** Digest used for the next SENDME cell if any. */
- uint8_t sendme_digest[DIGEST_LEN];
- };
- #undef crypto_cipher_t
- #endif /* !defined(RELAY_CRYPTO_ST_H) */
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