mirror of
https://github.com/transmission/transmission
synced 2024-12-23 00:04:06 +00:00
42de056a4b
On a way to factoring out OpenSSL support to a standalone file to ease
addition of other crypto libraries support in the future, move helpers
providing SHA1/HEX conversion to crypto-utils.{c,h}.
Rename functions:
* tr_sha1_to_hex -> tr_binary_to_hex (add length argument),
* tr_hex_to_sha1 -> tr_hex_to_binary (add length argument).
Make tr_sha1_to_hex and tr_hex_to_sha1 wrappers around above functions.
241 lines
8.1 KiB
C
241 lines
8.1 KiB
C
/*
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* This file Copyright (C) 2007-2014 Mnemosyne LLC
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*
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* It may be used under the GNU GPL versions 2 or 3
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* or any future license endorsed by Mnemosyne LLC.
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*
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* $Id$
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*/
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#ifndef TR_CRYPTO_UTILS_H
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#define TR_CRYPTO_UTILS_H
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#include <inttypes.h>
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#include <stddef.h>
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#include "transmission.h" /* SHA_DIGEST_LENGTH */
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#include "utils.h" /* TR_GNUC_MALLOC, TR_GNUC_NULL_TERMINATED */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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*** @addtogroup utils Utilities
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*** @{
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**/
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/** @brief Opaque SHA1 context type. */
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typedef void * tr_sha1_ctx_t;
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/** @brief Opaque RC4 context type. */
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typedef void * tr_rc4_ctx_t;
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/** @brief Opaque DH context type. */
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typedef void * tr_dh_ctx_t;
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/** @brief Opaque DH secret key type. */
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typedef void * tr_dh_secret_t;
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/**
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* @brief Generate a SHA1 hash from one or more chunks of memory.
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*/
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bool tr_sha1 (uint8_t * hash,
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const void * data1,
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int data1_length,
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...) TR_GNUC_NULL_TERMINATED;
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/**
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* @brief Allocate and initialize new SHA1 hasher context.
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*/
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tr_sha1_ctx_t tr_sha1_init (void);
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/**
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* @brief Update SHA1 hash.
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*/
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bool tr_sha1_update (tr_sha1_ctx_t handle,
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const void * data,
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size_t data_length);
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/**
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* @brief Finalize and export SHA1 hash, free hasher context.
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*/
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bool tr_sha1_final (tr_sha1_ctx_t handle,
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uint8_t * hash);
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/**
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* @brief Allocate and initialize new RC4 cipher context.
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*/
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tr_rc4_ctx_t tr_rc4_new (void);
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/**
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* @brief Free RC4 cipher context.
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*/
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void tr_rc4_free (tr_rc4_ctx_t handle);
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/**
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* @brief Set RC4 cipher key.
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*/
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void tr_rc4_set_key (tr_rc4_ctx_t handle,
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const uint8_t * key,
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size_t key_length);
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/**
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* @brief Process memory block with RC4 cipher.
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*/
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void tr_rc4_process (tr_rc4_ctx_t handle,
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const void * input,
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void * output,
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size_t length);
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/**
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* @brief Allocate and initialize new Diffie-Hellman (DH) key exchange context.
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*/
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tr_dh_ctx_t tr_dh_new (const uint8_t * prime_num,
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size_t prime_num_length,
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const uint8_t * generator_num,
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size_t generator_num_length);
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/**
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* @brief Free DH key exchange context.
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*/
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void tr_dh_free (tr_dh_ctx_t handle);
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/**
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* @brief Generate private and public DH keys, export public key.
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*/
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bool tr_dh_make_key (tr_dh_ctx_t handle,
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size_t private_key_length,
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uint8_t * public_key,
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size_t * public_key_length);
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/**
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* @brief Perform DH key exchange, generate secret key.
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*/
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tr_dh_secret_t tr_dh_agree (tr_dh_ctx_t handle,
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const uint8_t * other_public_key,
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size_t other_public_key_length);
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/**
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* @brief Calculate SHA1 hash of DH secret key, prepending and/or appending
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* given data to the key during calculation.
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*/
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bool tr_dh_secret_derive (tr_dh_secret_t handle,
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const void * prepend_data,
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size_t prepend_data_size,
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const void * append_data,
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size_t append_data_size,
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uint8_t * hash);
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/**
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* @brief Free DH secret key returned by @ref tr_dh_agree.
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*/
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void tr_dh_secret_free (tr_dh_secret_t handle);
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/**
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* @brief Align DH key (big-endian number) to required length (internal, do not use).
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*/
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void tr_dh_align_key (uint8_t * key_buffer,
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size_t key_size,
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size_t buffer_size);
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/**
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* @brief Returns a random number in the range of [0...upper_bound).
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*/
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int tr_rand_int (int upper_bound);
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/**
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* @brief Returns a pseudorandom number in the range of [0...upper_bound).
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*
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* This is faster, BUT WEAKER, than tr_rand_int () and never be used in sensitive cases.
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* @see tr_rand_int ()
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*/
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int tr_rand_int_weak (int upper_bound);
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/**
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* @brief Fill a buffer with random bytes.
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*/
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bool tr_rand_buffer (void * buffer,
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size_t length);
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/**
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* @brief Generate a SSHA password from its plaintext source.
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*/
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char * tr_ssha1 (const char * plain_text) TR_GNUC_MALLOC;
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/**
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* @brief Validate a test password against the a ssha1 password.
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*/
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bool tr_ssha1_matches (const char * ssha1,
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const char * plain_text);
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/**
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* @brief Translate a block of bytes into base64.
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* @return a newly-allocated null-terminated string that can be freed with tr_free ()
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*/
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void * tr_base64_encode (const void * input,
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size_t input_length,
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size_t * output_length) TR_GNUC_MALLOC;
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/**
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* @brief Translate null-terminated string into base64.
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* @return a newly-allocated null-terminated string that can be freed with tr_free ()
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*/
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void * tr_base64_encode_str (const char * input,
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size_t * output_length) TR_GNUC_MALLOC;
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/**
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* @brief Translate a block of bytes into base64 (internal, do not use).
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* @return a newly-allocated null-terminated string that can be freed with tr_free ()
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*/
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void * tr_base64_encode_impl (const void * input,
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size_t input_length,
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size_t * output_length) TR_GNUC_MALLOC;
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/**
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* @brief Translate a block of bytes from base64 into raw form.
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* @return a newly-allocated null-terminated string that can be freed with tr_free ()
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*/
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void * tr_base64_decode (const void * input,
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size_t input_length,
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size_t * output_length) TR_GNUC_MALLOC;
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/**
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* @brief Translate null-terminated string from base64 into raw form.
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* @return a newly-allocated null-terminated string that can be freed with tr_free ()
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*/
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void * tr_base64_decode_str (const char * input,
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size_t * output_length) TR_GNUC_MALLOC;
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/**
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* @brief Translate null-terminated string from base64 into raw form (internal, do not use).
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* @return a newly-allocated null-terminated string that can be freed with tr_free ()
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*/
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void * tr_base64_decode_impl (const void * input,
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size_t input_length,
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size_t * output_length) TR_GNUC_MALLOC;
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/**
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* @brief Wrapper around tr_binary_to_hex () for SHA_DIGEST_LENGTH.
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*/
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static inline void
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tr_sha1_to_hex (char * hex,
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const uint8_t * sha1)
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{
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tr_binary_to_hex (sha1, hex, SHA_DIGEST_LENGTH);
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}
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/**
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* @brief Wrapper around tr_hex_to_binary () for SHA_DIGEST_LENGTH.
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*/
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static inline void
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tr_hex_to_sha1 (uint8_t * sha1,
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const char * hex)
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{
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tr_hex_to_binary (hex, sha1, SHA_DIGEST_LENGTH);
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}
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/** @} */
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#ifdef __cplusplus
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}
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#endif
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#endif /* TR_CRYPTO_UTILS_H */
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