Functions
psa_status_t	psa_generate_random (uint8_t *output, size_t output_size)
	Generate random bytes. More...

psa_status_t	psa_generate_key (const psa_key_attributes_t attributes, psa_key_handle_t handle)
	Generate a key or key pair. More...

psa_status_t	psa_generate_key (const psa_key_attributes_t attributes, psa_key_id_t key)
	Generate a key or key pair. More...

Detailed Description

Function Documentation

Generate a key or key pair.

The key is generated randomly. Its location, usage policy, type and size are taken from attributes.

Implementations must reject an attempt to generate a key of size 0.

The following type-specific considerations apply:

For RSA keys (PSA_KEY_TYPE_RSA_KEY_PAIR), the public exponent is 65537. The modulus is a product of two probabilistic primes between 2^{n-1} and 2^n where n is the bit size specified in the attributes.

Parameters

[in]	attributes	The attributes for the new key.
[out]	key	On success, an identifier for the newly created key. For persistent keys, this is the key identifier defined in `attributes`. `0` on failure.

Return values

PSA_SUCCESS	Success. If the key is persistent, the key material and the key's metadata have been saved to persistent storage.
PSA_ERROR_ALREADY_EXISTS	This is an attempt to create a persistent key, and there is already a persistent key with the given identifier.
PSA_ERROR_NOT_SUPPORTED
PSA_ERROR_INVALID_ARGUMENT
PSA_ERROR_INSUFFICIENT_MEMORY
PSA_ERROR_INSUFFICIENT_ENTROPY
PSA_ERROR_COMMUNICATION_FAILURE
PSA_ERROR_HARDWARE_FAILURE
PSA_ERROR_CORRUPTION_DETECTED
PSA_ERROR_INSUFFICIENT_STORAGE
PSA_ERROR_STORAGE_FAILURE
PSA_ERROR_BAD_STATE	The library has not been previously initialized by psa_crypto_init(). It is implementation-dependent whether a failure to initialize results in this error code.

Generate a key or key pair.

The key is generated randomly. Its location, usage policy, type and size are taken from attributes.

Implementations must reject an attempt to generate a key of size 0.

The following type-specific considerations apply:

For RSA keys (PSA_KEY_TYPE_RSA_KEY_PAIR), the public exponent is 65537. The modulus is a product of two probabilistic primes between 2^{n-1} and 2^n where n is the bit size specified in the attributes.

Parameters

[in]	attributes	The attributes for the new key.
[out]	handle	On success, a handle to the newly created key. `0` on failure.

Return values

PSA_SUCCESS	Success. If the key is persistent, the key material and the key's metadata have been saved to persistent storage.
PSA_ERROR_ALREADY_EXISTS	This is an attempt to create a persistent key, and there is already a persistent key with the given identifier.
PSA_ERROR_NOT_SUPPORTED
PSA_ERROR_INVALID_ARGUMENT
PSA_ERROR_INSUFFICIENT_MEMORY
PSA_ERROR_INSUFFICIENT_ENTROPY
PSA_ERROR_COMMUNICATION_FAILURE
PSA_ERROR_HARDWARE_FAILURE
PSA_ERROR_CORRUPTION_DETECTED
PSA_ERROR_INSUFFICIENT_STORAGE
PSA_ERROR_STORAGE_FAILURE
PSA_ERROR_BAD_STATE	The library has not been previously initialized by psa_crypto_init(). It is implementation-dependent whether a failure to initialize results in this error code.

psa_status_t psa_generate_random	(	uint8_t *	output,
		size_t	output_size
	)

Generate random bytes.

Warning: This function can fail! Callers MUST check the return status and MUST NOT use the content of the output buffer if the return status is not PSA_SUCCESS.

Parameters

[out]	output	Output buffer for the generated data.
	output_size	Number of bytes to generate and output.

Return values

PSA_SUCCESS
PSA_ERROR_NOT_SUPPORTED
PSA_ERROR_INSUFFICIENT_ENTROPY
PSA_ERROR_INSUFFICIENT_MEMORY
PSA_ERROR_COMMUNICATION_FAILURE
PSA_ERROR_HARDWARE_FAILURE
PSA_ERROR_CORRUPTION_DETECTED
PSA_ERROR_BAD_STATE	The library has not been previously initialized by psa_crypto_init(). It is implementation-dependent whether a failure to initialize results in this error code.