mbed TLS v3.1.0
|
This file contains SHA-224 and SHA-256 definitions and functions. More...
#include "mbedtls/private_access.h"
#include "mbedtls/build_info.h"
#include <stddef.h>
#include <stdint.h>
#include "sha256_alt.h"
Go to the source code of this file.
Macros | |
#define | MBEDTLS_ERR_SHA256_BAD_INPUT_DATA -0x0074 |
Functions | |
void | mbedtls_sha256_init (mbedtls_sha256_context *ctx) |
This function initializes a SHA-256 context. More... | |
void | mbedtls_sha256_free (mbedtls_sha256_context *ctx) |
This function clears a SHA-256 context. More... | |
void | mbedtls_sha256_clone (mbedtls_sha256_context *dst, const mbedtls_sha256_context *src) |
This function clones the state of a SHA-256 context. More... | |
int | mbedtls_sha256_starts (mbedtls_sha256_context *ctx, int is224) |
This function starts a SHA-224 or SHA-256 checksum calculation. More... | |
int | mbedtls_sha256_update (mbedtls_sha256_context *ctx, const unsigned char *input, size_t ilen) |
This function feeds an input buffer into an ongoing SHA-256 checksum calculation. More... | |
int | mbedtls_sha256_finish (mbedtls_sha256_context *ctx, unsigned char *output) |
This function finishes the SHA-256 operation, and writes the result to the output buffer. More... | |
int | mbedtls_internal_sha256_process (mbedtls_sha256_context *ctx, const unsigned char data[64]) |
This function processes a single data block within the ongoing SHA-256 computation. This function is for internal use only. More... | |
int | mbedtls_sha256 (const unsigned char *input, size_t ilen, unsigned char *output, int is224) |
This function calculates the SHA-224 or SHA-256 checksum of a buffer. More... | |
int | mbedtls_sha256_self_test (int verbose) |
The SHA-224 and SHA-256 checkup routine. More... | |
This file contains SHA-224 and SHA-256 definitions and functions.
The Secure Hash Algorithms 224 and 256 (SHA-224 and SHA-256) cryptographic hash functions are defined in FIPS 180-4: Secure Hash Standard (SHS).
Definition in file sha256.h.
#define MBEDTLS_ERR_SHA256_BAD_INPUT_DATA -0x0074 |
int mbedtls_internal_sha256_process | ( | mbedtls_sha256_context * | ctx, |
const unsigned char | data[64] | ||
) |
This function processes a single data block within the ongoing SHA-256 computation. This function is for internal use only.
ctx | The SHA-256 context. This must be initialized. |
data | The buffer holding one block of data. This must be a readable buffer of length 64 Bytes. |
0
on success. int mbedtls_sha256 | ( | const unsigned char * | input, |
size_t | ilen, | ||
unsigned char * | output, | ||
int | is224 | ||
) |
This function calculates the SHA-224 or SHA-256 checksum of a buffer.
The function allocates the context, performs the calculation, and frees the context.
The SHA-256 result is calculated as output = SHA-256(input buffer).
input | The buffer holding the data. This must be a readable buffer of length ilen Bytes. |
ilen | The length of the input data in Bytes. |
output | The SHA-224 or SHA-256 checksum result. This must be a writable buffer of length 32 bytes for SHA-256, 28 bytes for SHA-224. |
is224 | Determines which function to use. This must be either 0 for SHA-256, or 1 for SHA-224. |
0
on success. void mbedtls_sha256_clone | ( | mbedtls_sha256_context * | dst, |
const mbedtls_sha256_context * | src | ||
) |
This function clones the state of a SHA-256 context.
dst | The destination context. This must be initialized. |
src | The context to clone. This must be initialized. |
int mbedtls_sha256_finish | ( | mbedtls_sha256_context * | ctx, |
unsigned char * | output | ||
) |
This function finishes the SHA-256 operation, and writes the result to the output buffer.
ctx | The SHA-256 context. This must be initialized and have a hash operation started. |
output | The SHA-224 or SHA-256 checksum result. This must be a writable buffer of length 32 bytes for SHA-256, 28 bytes for SHA-224. |
0
on success. void mbedtls_sha256_free | ( | mbedtls_sha256_context * | ctx | ) |
This function clears a SHA-256 context.
ctx | The SHA-256 context to clear. This may be NULL , in which case this function returns immediately. If it is not NULL , it must point to an initialized SHA-256 context. |
void mbedtls_sha256_init | ( | mbedtls_sha256_context * | ctx | ) |
This function initializes a SHA-256 context.
ctx | The SHA-256 context to initialize. This must not be NULL . |
int mbedtls_sha256_self_test | ( | int | verbose | ) |
The SHA-224 and SHA-256 checkup routine.
0
on success. 1
on failure. int mbedtls_sha256_starts | ( | mbedtls_sha256_context * | ctx, |
int | is224 | ||
) |
This function starts a SHA-224 or SHA-256 checksum calculation.
ctx | The context to use. This must be initialized. |
is224 | This determines which function to use. This must be either 0 for SHA-256, or 1 for SHA-224. |
0
on success. int mbedtls_sha256_update | ( | mbedtls_sha256_context * | ctx, |
const unsigned char * | input, | ||
size_t | ilen | ||
) |
This function feeds an input buffer into an ongoing SHA-256 checksum calculation.
ctx | The SHA-256 context. This must be initialized and have a hash operation started. |
input | The buffer holding the data. This must be a readable buffer of length ilen Bytes. |
ilen | The length of the input data in Bytes. |
0
on success.