74 lines
2.8 KiB
C
74 lines
2.8 KiB
C
/* Copyright (c) 2001, Matej Pfajfar.
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* Copyright (c) 2001-2004, Roger Dingledine.
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* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
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* Copyright (c) 2007-2016, The Tor Project, Inc. */
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/* See LICENSE for licensing information */
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#ifndef TOR_CRYPTO_S2K_H_INCLUDED
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#define TOR_CRYPTO_S2K_H_INCLUDED
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#include <stdio.h>
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#include "torint.h"
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/** Length of RFC2440-style S2K specifier: the first 8 bytes are a salt, the
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* 9th describes how much iteration to do. */
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#define S2K_RFC2440_SPECIFIER_LEN 9
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void secret_to_key_rfc2440(
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char *key_out, size_t key_out_len, const char *secret,
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size_t secret_len, const char *s2k_specifier);
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/** Flag for secret-to-key function: do not use scrypt. */
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#define S2K_FLAG_NO_SCRYPT (1u<<0)
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/** Flag for secret-to-key functions: if using a memory-tuned s2k function,
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* assume that we have limited memory. */
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#define S2K_FLAG_LOW_MEM (1u<<1)
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/** Flag for secret-to-key functions: force use of pbkdf2. Without this, we
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* default to scrypt, then RFC2440. */
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#define S2K_FLAG_USE_PBKDF2 (1u<<2)
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/** Maximum possible output length from secret_to_key_new. */
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#define S2K_MAXLEN 64
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/** Error code from secret-to-key functions: all is well */
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#define S2K_OKAY 0
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/** Error code from secret-to-key functions: generic failure */
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#define S2K_FAILED -1
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/** Error code from secret-to-key functions: provided secret didn't match */
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#define S2K_BAD_SECRET -2
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/** Error code from secret-to-key functions: didn't recognize the algorithm */
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#define S2K_BAD_ALGORITHM -3
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/** Error code from secret-to-key functions: specifier wasn't valid */
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#define S2K_BAD_PARAMS -4
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/** Error code from secret-to-key functions: compiled without scrypt */
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#define S2K_NO_SCRYPT_SUPPORT -5
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/** Error code from secret-to-key functions: not enough space to write output.
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*/
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#define S2K_TRUNCATED -6
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/** Error code from secret-to-key functions: Wrong length for specifier. */
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#define S2K_BAD_LEN -7
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int secret_to_key_new(uint8_t *buf,
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size_t buf_len,
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size_t *len_out,
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const char *secret, size_t secret_len,
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unsigned flags);
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int secret_to_key_make_specifier(uint8_t *buf, size_t buf_len, unsigned flags);
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int secret_to_key_check(const uint8_t *spec_and_key, size_t spec_and_key_len,
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const char *secret, size_t secret_len);
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int secret_to_key_derivekey(uint8_t *key_out, size_t key_out_len,
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const uint8_t *spec, size_t spec_len,
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const char *secret, size_t secret_len);
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#ifdef CRYPTO_S2K_PRIVATE
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STATIC int secret_to_key_compute_key(uint8_t *key_out, size_t key_out_len,
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const uint8_t *spec, size_t spec_len,
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const char *secret, size_t secret_len,
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int type);
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#endif
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#endif
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