This module calculates SHA-256 (SHA-2, FIPS-180) hashes.
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This module calculates SHA-256 (SHA-2, FIPS-180) hashes.
To use this module, first call sha256_init on a sha256_context_t instance. Then call sha256_update with the data to be hashed. This step can optionally be done with multiple calls to sha256_update, each with a section of the data (in the correct order). After all data has been passed to sha256_update, call sha256_final to finalize and extract the hash value.
This code is adapted from code by Brad Conte, retrieved from https://github.com/B-Con/crypto-algorithms.
Function for extracting the hash value from a hash instance.
This function should be called after all data to be hashed has been passed to the hash instance (by one or more calls to sha256_update).
Do not call sha256_update again after sha256_final has been called.
- Parameters
-
[in,out] | ctx | Hash instance. |
[out] | hash | Array to hold the extracted hash value (assumed to be 32 bytes long). |
- Return values
-
NRF_SUCCESS | If the has value was successfully extracted. |
NRF_ERROR_NULL | If a parameter was NULL. |
Function for initializing a sha256_context_t instance.
- Parameters
-
[out] | ctx | Context instance to be initialized. |
- Return values
-
NRF_SUCCESS | If the instance was successfully initialized. |
NRF_ERROR_NULL | If the parameter was NULL. |
Function for calculating the hash of an array of uint8_t data.
This function can be called multiple times in sequence. This is equivalent to calling the function once on a concatenation of the data from the different calls.
- Parameters
-
[in,out] | ctx | Hash instance. |
[in] | data | Data to be hashed. |
[in] | len | Length of the data to be hashed. |
- Return values
-
NRF_SUCCESS | If the data was successfully hashed. |
NRF_ERROR_NULL | If the ctx parameter was NULL or the data parameter was NULL, while the len parameter was not zero. |