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Merge pull request #1119 from davidhorstmann-arm/psa-buffer-copy-fn

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Implement buffer copying functions for PSA crypto
This commit is contained in:
Dave Rodgman
2023-11-24 10:46:38 +00:00
committed by GitHub
parent c9f8f5602a a575a5a26a
commit c7cc83cc44
6 changed files with 533 additions and 1 deletions
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70
library/psa_crypto_core.h
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@ -842,4 +842,74 @@ psa_status_t mbedtls_psa_verify_hash_complete(
psa_status_t mbedtls_psa_verify_hash_abort(
mbedtls_psa_verify_hash_interruptible_operation_t *operation);
typedef struct psa_crypto_local_input_s {
uint8_t *buffer;
size_t length;
} psa_crypto_local_input_t;
#define PSA_CRYPTO_LOCAL_INPUT_INIT ((psa_crypto_local_input_t) { NULL, 0 })
/** Allocate a local copy of an input buffer and copy the contents into it.
*
* \param[in] input Pointer to input buffer.
* \param[in] input_len Length of the input buffer.
* \param[out] local_input Pointer to a psa_crypto_local_input_t struct
* containing a local input copy.
* \return #PSA_SUCCESS, if the buffer was successfully
* copied.
* \return #PSA_ERROR_INSUFFICIENT_MEMORY, if a copy of
* the buffer cannot be allocated.
*/
psa_status_t psa_crypto_local_input_alloc(const uint8_t *input, size_t input_len,
psa_crypto_local_input_t *local_input);
/** Free a local copy of an input buffer.
*
* \param[in] local_input Pointer to a psa_crypto_local_input_t struct
* populated by a previous call to
* psa_crypto_local_input_alloc().
*/
void psa_crypto_local_input_free(psa_crypto_local_input_t *local_input);
typedef struct psa_crypto_local_output_s {
uint8_t *original;
uint8_t *buffer;
size_t length;
} psa_crypto_local_output_t;
#define PSA_CRYPTO_LOCAL_OUTPUT_INIT ((psa_crypto_local_output_t) { NULL, NULL, 0 })
/** Allocate a local copy of an output buffer.
*
* \note This does not copy any data from the original
* output buffer but only allocates a buffer
* whose contents will be copied back to the
* original in a future call to
* psa_crypto_local_output_free().
*
* \param[in] output Pointer to output buffer.
* \param[in] output_len Length of the output buffer.
* \param[out] local_output Pointer to a psa_crypto_local_output_t struct to
* populate with the local output copy.
* \return #PSA_SUCCESS, if the buffer was successfully
* copied.
* \return #PSA_ERROR_INSUFFICIENT_MEMORY, if a copy of
* the buffer cannot be allocated.
*/
psa_status_t psa_crypto_local_output_alloc(uint8_t *output, size_t output_len,
psa_crypto_local_output_t *local_output);
/** Copy from a local copy of an output buffer back to the original, then
* free the local copy.
*
* \param[in] local_output Pointer to a psa_crypto_local_output_t struct
* populated by a previous call to
* psa_crypto_local_output_alloc().
* \return #PSA_SUCCESS, if the local output was
* successfully copied back to the original.
* \return #PSA_ERROR_CORRUPTION_DETECTED, if the output
* could not be copied back to the original.
*/
psa_status_t psa_crypto_local_output_free(psa_crypto_local_output_t *local_output);
#endif /* PSA_CRYPTO_CORE_H */