mirror of https://go.googlesource.com/go
31 lines
891 B
ArmAsm
31 lines
891 B
ArmAsm
// Copyright 2020 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
//go:build !purego
|
|
|
|
#include "textflag.h"
|
|
|
|
// func kdsa(fc uint64, params *[4096]byte) (errn uint64)
|
|
TEXT ·kdsa(SB), NOSPLIT|NOFRAME, $0-24
|
|
MOVD fc+0(FP), R0 // function code
|
|
MOVD params+8(FP), R1 // address parameter block
|
|
|
|
loop:
|
|
KDSA R0, R4 // compute digital signature authentication
|
|
BVS loop // branch back if interrupted
|
|
BGT retry // signing unsuccessful, but retry with new CSPRN
|
|
BLT error // condition code of 1 indicates a failure
|
|
|
|
success:
|
|
MOVD $0, errn+16(FP) // return 0 - sign/verify was successful
|
|
RET
|
|
|
|
error:
|
|
MOVD $1, errn+16(FP) // return 1 - sign/verify failed
|
|
RET
|
|
|
|
retry:
|
|
MOVD $2, errn+16(FP) // return 2 - sign/verify was unsuccessful -- if sign, retry with new RN
|
|
RET
|