tor  0.4.1.1-alpha-dev
Data Structures | Functions
crypto_digest.c File Reference
#include "lib/container/smartlist.h"
#include "lib/crypt_ops/crypto_digest.h"
#include "lib/crypt_ops/crypto_util.h"
#include "lib/log/log.h"
#include "lib/log/util_bug.h"
#include "keccak-tiny/keccak-tiny.h"
#include <stdlib.h>
#include <string.h>
#include "lib/arch/bytes.h"

Go to the source code of this file.

Data Structures

struct  crypto_xof_t
 

Functions

int crypto_common_digests (common_digests_t *ds_out, const char *m, size_t len)
 
const char * crypto_digest_algorithm_get_name (digest_algorithm_t alg)
 
int crypto_digest_algorithm_parse_name (const char *name)
 
size_t crypto_digest_algorithm_get_length (digest_algorithm_t alg)
 
void crypto_mac_sha3_256 (uint8_t *mac_out, size_t len_out, const uint8_t *key, size_t key_len, const uint8_t *msg, size_t msg_len)
 
crypto_xof_tcrypto_xof_new (void)
 
void crypto_xof_add_bytes (crypto_xof_t *xof, const uint8_t *data, size_t len)
 
void crypto_xof_squeeze_bytes (crypto_xof_t *xof, uint8_t *out, size_t len)
 
void crypto_xof_free_ (crypto_xof_t *xof)
 
void crypto_xof (uint8_t *output, size_t output_len, const uint8_t *input, size_t input_len)
 

Detailed Description

Block of functions related with digest and xof utilities and operations.

Definition in file crypto_digest.c.

Function Documentation

◆ crypto_common_digests()

int crypto_common_digests ( common_digests_t ds_out,
const char *  m,
size_t  len 
)

Set the common_digests_t in ds_out to contain every digest on the len bytes in m that we know how to compute. Return 0 on success, -1 on failure.

Definition at line 30 of file crypto_digest.c.

References tor_assert().

Referenced by router_get_hashes_impl().

◆ crypto_digest_algorithm_get_length()

size_t crypto_digest_algorithm_get_length ( digest_algorithm_t  alg)

Given an algorithm, return the digest length in bytes.

Definition at line 86 of file crypto_digest.c.

Referenced by crypto_digest_get_digest().

◆ crypto_digest_algorithm_get_name()

const char* crypto_digest_algorithm_get_name ( digest_algorithm_t  alg)

Return the name of an algorithm, as used in directory documents.

Definition at line 44 of file crypto_digest.c.

◆ crypto_digest_algorithm_parse_name()

int crypto_digest_algorithm_parse_name ( const char *  name)

Given the name of a digest algorithm, return its integer value, or -1 if the name is not recognized.

Definition at line 68 of file crypto_digest.c.

◆ crypto_mac_sha3_256()

void crypto_mac_sha3_256 ( uint8_t *  mac_out,
size_t  len_out,
const uint8_t *  key,
size_t  key_len,
const uint8_t *  msg,
size_t  msg_len 
)

Compute a MAC using SHA3-256 of msg_len bytes in msg using a key of length key_len and a salt of length salt_len. Store the result of len_out bytes in in mac_out. This function can't fail.

Definition at line 110 of file crypto_digest.c.

References crypto_digest256_new(), tor_assert(), and tor_htonll().

◆ crypto_xof()

void crypto_xof ( uint8_t *  output,
size_t  output_len,
const uint8_t *  input,
size_t  input_len 
)

Compute the XOF (SHAKE256) of a input_len bytes at input, putting output_len bytes at output.

Definition at line 226 of file crypto_digest.c.

References crypto_xof_add_bytes(), crypto_xof_new(), crypto_xof_squeeze_bytes(), and tor_assert().

◆ crypto_xof_add_bytes()

void crypto_xof_add_bytes ( crypto_xof_t xof,
const uint8_t *  data,
size_t  len 
)

Absorb bytes into a XOF object. Must not be called after a call to crypto_xof_squeeze_bytes() for the same instance, and will assert if attempted.

Definition at line 183 of file crypto_digest.c.

References tor_assert().

Referenced by crypto_fast_rng_add_entopy(), and crypto_xof().

◆ crypto_xof_free_()

void crypto_xof_free_ ( crypto_xof_t xof)

Cleanse and deallocate a XOF object.

Definition at line 211 of file crypto_digest.c.

References memwipe(), and tor_free.

◆ crypto_xof_new()

crypto_xof_t* crypto_xof_new ( void  )

Allocate a new XOF object backed by SHAKE-256. The security level provided is a function of the length of the output used. Read and understand FIPS-202 A.2 "Additional Consideration for Extendable-Output Functions" before using this construct.

Definition at line 163 of file crypto_digest.c.

Referenced by crypto_fast_rng_add_entopy(), and crypto_xof().

◆ crypto_xof_squeeze_bytes()

void crypto_xof_squeeze_bytes ( crypto_xof_t xof,
uint8_t *  out,
size_t  len 
)

Squeeze bytes out of a XOF object. Calling this routine will render the XOF instance ineligible to absorb further data.

Definition at line 198 of file crypto_digest.c.

References tor_assert().

Referenced by crypto_xof().