blob: ba5b3bf9fa0ce29065c3a07460531375cefbbf08 [file] [log] [blame]
// 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.
#include "textflag.h"
// func kdsa(fc uint64, params *[4096]byte) (errn uint64)
TEXT ┬Ěkdsa(SB), NOSPLIT|NOFRAME, $0-24
MOVD fc+0(FP), R0 // function code
MOVD params+8(FP), R1 // address parameter block
loop:
WORD $0xB93A0008 // 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