diff options
Diffstat (limited to 'src/crypto/ecdsa/ecdsa_s390x.s')
| -rw-r--r-- | src/crypto/ecdsa/ecdsa_s390x.s | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/crypto/ecdsa/ecdsa_s390x.s b/src/crypto/ecdsa/ecdsa_s390x.s new file mode 100644 index 0000000..ba5b3bf --- /dev/null +++ b/src/crypto/ecdsa/ecdsa_s390x.s @@ -0,0 +1,28 @@ +// 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 ·kdsa(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 |