mbx_nistp256/384/521_ecdsa_sign_setup
mbx_nistp256/384/521_ecdsa_sign_setup
Precomputes the ECDSA signature.
Syntax
mbx_status mbx_nistp256_ecdsa_sign_setup_mb8(int64u*
pa_inv_eph_skey
[8], int64u*
pa_sign_rp
[8], const int64u* const
pa_eph_skey
[8], int8u*
pBuffer
);
mbx_status mbx_nistp256_ecdsa_sign_setup_ssl_mb8(BIGNUM*
pa_inv_eph_skey
[8], BIGNUM*
pa_sign_rp
[8], const BIGNUM* const
pa_eph_skey
[8], int8u*
pBuffer
);
mbx_status mbx_nistp384_ecdsa_sign_setup_mb8(int64u*
pa_inv_eph_skey
[8], int64u*
pa_sign_rp
[8], const int64u* const
pa_eph_skey
[8], int8u*
pBuffer
);
mbx_status mbx_nistp384_ecdsa_sign_setup_ssl_mb8(BIGNUM*
pa_inv_eph_skey
[8], BIGNUM*
pa_sign_rp
[8], const BIGNUM* const
pa_eph_skey
[8], int8u*
pBuffer
);
mbx_status mbx_nistp521_ecdsa_sign_setup_mb8(int64u*
pa_inv_eph_skey
[8], int64u*
pa_sign_rp
[8], const int64u* const
pa_eph_skey
[8], int8u*
pBuffer
);
mbx_status mbx_nistp521_ecdsa_sign_setup_ssl_mb8(BIGNUM*
pa_inv_eph_skey
[8], BIGNUM*
pa_sign_rp
[8], const BIGNUM* const
pa_eph_skey
[8], int8u*
pBuffer
);
Include Files
crypto_mb/ec_nistp256.h
crypto_mb/ec_nistp384.h
crypto_mb/ec_nistp512.h
Parameters
- pa_eph_skey
- Array of pointers to the ephemeral private key vectors.
- pa_inv_eph_skey
- Array of pointers to the vectors of ephemeral private key inversion.
- pa_sign_rp
- Array of pointers to the vectors of pre-computed r-component signatures.
- pBuffer
- Pointer to the work buffer.
Description
Each function targets at the elliptic curve (EC) specified in the
name (
nistp256
, nistp384
or nistp521
). This function may be used to
precompute a part of the signature operation. Based on ephemeral
private keys, specified by pa_eph_skey
parameter the function
precomputes:- r-component of the signature storing the result specified bypa_sign_rp(step 2 of ECDSA operation)
- multiplicative inversion of ephemeral private key (used in step 3 of ECDSA operation) storing the result as specified bypa_inv_eph_skeyparameter
Precomputed can be used later in suitable
mbx_nistp_ecdsa_sign_complete_mb8()
function. The work buffer specified by
pBuffer
parameter
is not currently used and can be NULL
. All the functions above have own "twins" with "_ssl" in the name. The "twin" associated with the EC acts the same. The single difference in comparison with
mbx_nistp256/384/521_ecdsa_sign_setup()
is representation of the parameters. mbx_nistp256/384/521_ecdsa_sign_setup_ssl()
functions use BIGNUM datatype instead of vector.Return Values
The
mbx_nistp256/384/521_ecdsa_setup
functions return the status that indicates whether the operation completed successfully or not. The status value of 0 indicates that all operations completed successfully. The error condition can be analyzed by the MBX_GET_STS()
call.