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mbed TLS v2.16.3
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This file contains SHA-224 and SHA-256 definitions and functions. More...

Go to the source code of this file.
Data Structures | |
| struct | mbedtls_sha256_context |
| The SHA-256 context structure. More... | |
Macros | |
| #define | MBEDTLS_ERR_SHA256_HW_ACCEL_FAILED -0x0037 |
| #define | MBEDTLS_ERR_SHA256_BAD_INPUT_DATA -0x0074 |
| #define | MBEDTLS_DEPRECATED |
| #define | MBEDTLS_DEPRECATED |
Typedefs | |
| typedef struct mbedtls_sha256_context | mbedtls_sha256_context |
| The SHA-256 context structure. More... | |
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_ret (mbedtls_sha256_context *ctx, int is224) |
| This function starts a SHA-224 or SHA-256 checksum calculation. More... | |
| int | mbedtls_sha256_update_ret (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_ret (mbedtls_sha256_context *ctx, unsigned char output[32]) |
| 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... | |
| MBEDTLS_DEPRECATED void | mbedtls_sha256_starts (mbedtls_sha256_context *ctx, int is224) |
| This function starts a SHA-224 or SHA-256 checksum calculation. More... | |
| MBEDTLS_DEPRECATED void | 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... | |
| MBEDTLS_DEPRECATED void | mbedtls_sha256_finish (mbedtls_sha256_context *ctx, unsigned char output[32]) |
| This function finishes the SHA-256 operation, and writes the result to the output buffer. More... | |
| MBEDTLS_DEPRECATED void | mbedtls_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_ret (const unsigned char *input, size_t ilen, unsigned char output[32], int is224) |
| This function calculates the SHA-224 or SHA-256 checksum of a buffer. More... | |
| MBEDTLS_DEPRECATED void | mbedtls_sha256 (const unsigned char *input, size_t ilen, unsigned char output[32], 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 |
| #define MBEDTLS_ERR_SHA256_HW_ACCEL_FAILED -0x0037 |
| typedef struct mbedtls_sha256_context mbedtls_sha256_context |
The SHA-256 context structure.
The structure is used both for SHA-256 and for SHA-224
checksum calculations. The choice between these two is
made in the call to mbedtls_sha256_starts_ret().
| 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. | MBEDTLS_DEPRECATED void mbedtls_sha256 | ( | const unsigned char * | input, |
| size_t | ilen, | ||
| unsigned char | output[32], | ||
| 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. |
| is224 | Determines which function to use. This must be either 0 for SHA-256, or 1 for SHA-224. |
| 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. |
| MBEDTLS_DEPRECATED void mbedtls_sha256_finish | ( | mbedtls_sha256_context * | ctx, |
| unsigned char | output[32] | ||
| ) |
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. |
| int mbedtls_sha256_finish_ret | ( | mbedtls_sha256_context * | ctx, |
| unsigned char | output[32] | ||
| ) |
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. |
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. |
| MBEDTLS_DEPRECATED void mbedtls_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 size 64 Bytes. |
| int mbedtls_sha256_ret | ( | const unsigned char * | input, |
| size_t | ilen, | ||
| unsigned char | output[32], | ||
| 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. |
| is224 | Determines which function to use. This must be either 0 for SHA-256, or 1 for SHA-224. |
| int mbedtls_sha256_self_test | ( | int | verbose | ) |
The SHA-224 and SHA-256 checkup routine.
0 on success. 1 on failure. | MBEDTLS_DEPRECATED void 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 | Determines which function to use. This must be either 0 for SHA-256, or 1 for SHA-224. |
| int mbedtls_sha256_starts_ret | ( | 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. | MBEDTLS_DEPRECATED void 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 to use. 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. |
| int mbedtls_sha256_update_ret | ( | 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.
1.8.16