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Doc: generate_key: improve documentation of \p extra

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Gilles Peskine 2018-07-12 01:31:03 +02:00 committed by itayzafrir
parent 4c317f4b4c
commit 3fa675cd97
1 changed files with 17 additions and 12 deletions
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29
include/psa/crypto.h
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@ -2427,22 +2427,27 @@ typedef struct {
* \param[in] extra Extra parameters for key generation. The
* interpretation of this parameter depends on
* \c type. All types support \c NULL to use
* the default parameters specified below.
* default parameters. Implementation that support
* the generation of vendor-specific key types
* that allow extra parameters shall document
* the format of these extra parameters and
* the default values. For standard parameters,
* the meaning of \p extra is as follows:
* - For a symmetric key type (a type \c type such
* that #PSA_KEY_TYPE_IS_ASYMMETRIC(\p type) is
* false), \p extra must be \c NULL.
* - For an elliptic curve key type (a type \c type
* such that #PSA_KEY_TYPE_IS_ECC(\p type) is
* false), \p extra must be \c NULL.
* - For an RSA key, \p extra is an optional
* #psa_generate_key_extra_rsa structure
* specifying the public exponent. The
* default public exponent used when \p extra
* is \c NULL is 65537.
* \param extra_size Size of the buffer that \p extra
* points to, in bytes. Note that if \p extra is
* \c NULL then \p extra_size must be zero.
*
* For any symmetric key type (a type such that
* #PSA_KEY_TYPE_IS_ASYMMETRIC(\p type) is false), \p extra must be
* \c NULL. For asymmetric key types defined by this specification,
* the parameter type and the default parameters are defined by the
* table below. For vendor-defined key types, the vendor documentation
* shall define the parameter type and the default parameters.
*
* Type | Parameter type | Meaning | Parameters used if `extra == NULL`
* ---- | -------------- | ------- | ---------------------------------------
* `PSA_KEY_TYPE_RSA_KEYPAIR` | #psa_generate_key_extra_rsa | Public exponent | 65537
*
* \retval #PSA_SUCCESS
* \retval #PSA_ERROR_NOT_SUPPORTED
* \retval #PSA_ERROR_INVALID_ARGUMENT