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generate_key: define a structure type for RSA extra parameters

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This commit is contained in:
Gilles Peskine 2018-07-12 01:24:09 +02:00 committed by itayzafrir
parent 53d991e655
commit 4c317f4b4c
2 changed files with 18 additions and 5 deletions
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11
include/psa/crypto.h
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@ -2407,6 +2407,15 @@ psa_status_t psa_asymmetric_decrypt(psa_key_slot_t key,
psa_status_t psa_generate_random(uint8_t *output,
size_t output_size);
/** Extra parameters for RSA key generation.
*
* You may pass a pointer to a structure of this type as the `extra`
* parameter to psa_generate_key().
*/
typedef struct {
uint32_t e; /**! Public exponent value. Default: 65537. */
} psa_generate_key_extra_rsa;
/**
* \brief Generate a key or key pair.
*
@ -2432,7 +2441,7 @@ psa_status_t psa_generate_random(uint8_t *output,
*
* Type | Parameter type | Meaning | Parameters used if `extra == NULL`
* ---- | -------------- | ------- | ---------------------------------------
* `PSA_KEY_TYPE_RSA_KEYPAIR` | `unsigned int` | Public exponent | 65537
* `PSA_KEY_TYPE_RSA_KEYPAIR` | #psa_generate_key_extra_rsa | Public exponent | 65537
*
* \retval #PSA_SUCCESS
* \retval #PSA_ERROR_NOT_SUPPORTED

12
library/psa_crypto.c
View File

@ -3012,12 +3012,16 @@ psa_status_t psa_generate_key( psa_key_slot_t key,
return( PSA_ERROR_NOT_SUPPORTED );
if( extra != NULL )
{
const unsigned *p = extra;
const psa_generate_key_extra_rsa *p = extra;
if( extra_size != sizeof( *p ) )
return( PSA_ERROR_INVALID_ARGUMENT );
if( *p > INT_MAX )
return( PSA_ERROR_INVALID_ARGUMENT );
exponent = *p;
#if INT_MAX < 0xffffffff
/* Check that the uint32_t value passed by the caller fits
* in the range supported by this implementation. */
if( p->e > INT_MAX )
return( PSA_ERROR_NOT_SUPPORTED );
#endif
exponent = p->e;
}
rsa = mbedtls_calloc( 1, sizeof( *rsa ) );
if( rsa == NULL )