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Document the general definition of bit sizes for asymmetric keys

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Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2021-03-16 18:19:18 +01:00
parent 27354690cb
commit 6a427bf306
1 changed files with 16 additions and 2 deletions
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18
include/psa/crypto_values.h
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@ -451,9 +451,15 @@
*/
#define PSA_KEY_TYPE_CHACHA20 ((psa_key_type_t)0x2004)
/** RSA public key. */
/** RSA public key.
*
* The size of an RSA key is the bit size of the modulus.
*/
#define PSA_KEY_TYPE_RSA_PUBLIC_KEY ((psa_key_type_t)0x4001)
/** RSA key pair (private and public key). */
/** RSA key pair (private and public key).
*
* The size of an RSA key is the bit size of the modulus.
*/
#define PSA_KEY_TYPE_RSA_KEY_PAIR ((psa_key_type_t)0x7001)
/** Whether a key type is an RSA key (pair or public-only). */
#define PSA_KEY_TYPE_IS_RSA(type) \
@ -463,6 +469,10 @@
#define PSA_KEY_TYPE_ECC_KEY_PAIR_BASE ((psa_key_type_t)0x7100)
#define PSA_KEY_TYPE_ECC_CURVE_MASK ((psa_key_type_t)0x00ff)
/** Elliptic curve key pair.
*
* The size of an elliptic curve key is the bit size associated with the curve,
* i.e. the bit size of *q* for a curve over a field *F<sub>q</sub>*.
* See the documentation of `PSA_ECC_FAMILY_xxx` curve families for details.
*
* \param curve A value of type ::psa_ecc_family_t that
* identifies the ECC curve to be used.
@ -470,6 +480,10 @@
#define PSA_KEY_TYPE_ECC_KEY_PAIR(curve) \
(PSA_KEY_TYPE_ECC_KEY_PAIR_BASE | (curve))
/** Elliptic curve public key.
*
* The size of an elliptic curve public key is the same as the corresponding
* private key (see #PSA_KEY_TYPE_ECC_KEY_PAIR and the documentation of
* `PSA_ECC_FAMILY_xxx` curve families).
*
* \param curve A value of type ::psa_ecc_family_t that
* identifies the ECC curve to be used.