Developer Reference

Contents

mbx_ed25519_sign_mb8

Computes signature.

Syntax

mbx_status mbx_ed25519_sign_mb8(ed25519_sign_component*
pa_sign_r
[8], ed25519_sign_component*
pa_sign_s
[8], const int8u* const
pa_msg
[8], const int32u
msgLen
[8], const ed25519_private_key* const
pa_private_key
[8], const ed25519_public_key* const
pa_public_key
[8]
);
Include Files
crypto_mb/ed25519.h
Parameters
pa_sign_r
Array of pointers to the signature's r- components of 32 bytes length each.
pa_sign_s
Array of pointers to the signature's s- components of 32 bytes length each.
pa_msg
Array of pointers to the messages.
msgLen
Array of the message's lengths above in bytes.
pa_public_key
Array of pointers to the public keys of 32 bytes length each.
pa_private_key
Array of pointers to the private keys of 32 bytes length each.
Description
The
mbx_ed25519_sign_mb8
function computes
r-
and
s-
signature components, each of which corresponds to the message specified by
pa_msg[i]
parameter of
msgLen[i]
length. The pair
{private, public}
keys specified by
pa_private_key[i]
and
pa_public_key[i]
parameters.
mbx_ed25519_sign_mb8
is implementing so called PureEDDSA variant of EdDSA. For more information, see RFC 8032.
Return Values
The
mbx_ ed25519_public_key_mb8
function returns 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. The result of verification is returned as status too. The
MBX_STATUS_OK
value means that signature is verified, else status contains
MBX_STATUS_SIGNATURE_ERR
value.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.