Provided by: libssl-doc_3.0.5-2ubuntu1_all 
NAME
OPENSSL_s390xcap - the IBM z processor capabilities vector
SYNOPSIS
env OPENSSL_s390xcap=... <application>
DESCRIPTION
libcrypto supports z/Architecture instruction set extensions. These extensions are denoted
by individual bits in the capabilities vector. When libcrypto is initialized, the bits
returned by the STFLE instruction and by the QUERY functions are stored in the vector.
To change the set of instructions available to an application, you can set the
OPENSSL_s390xcap environment variable before you start the application. After
initialization, the capability vector is ANDed bitwise with a mask which is derived from
the environment variable.
The environment variable is a semicolon-separated list of tokens which is processed from
left to right (whitespace is ignored):
OPENSSL_s390xcap="<tok1>;<tok2>;..."
There are three types of tokens:
<string>
The name of a processor generation. A bit in the environment variable's mask is set to
one if and only if the specified processor generation implements the corresponding
instruction set extension. Possible values are z900, z990, z9, z10, z196, zEC12, z13,
z14 and z15.
<string>:<mask>:<mask>
The name of an instruction followed by two 64-bit masks. The part of the environment
variable's mask corresponding to the specified instruction is set to the specified
128-bit mask. Possible values are kimd, klmd, km, kmc, kmac, kmctr, kmo, kmf, prno,
kma, pcc and kdsa.
stfle:<mask>:<mask>:<mask>
Store-facility-list-extended (stfle) followed by three 64-bit masks. The part of the
environment variable's mask corresponding to the stfle instruction is set to the
specified 192-bit mask.
The 64-bit masks are specified in hexadecimal notation. The 0x prefix is optional. Prefix
a mask with a tilde, "~", to denote a bitwise NOT operation.
The following is a list of significant bits for each instruction. Colon rows separate the
individual 64-bit masks. The bit numbers in the first column are consistent with [1], that
is, 0 denotes the leftmost bit and the numbering is continuous across 64-bit mask
boundaries.
Bit Mask Facility/Function
stfle:
# 17 1<<46 message-security assist
# 25 1<<38 store-clock-fast facility
:
# 76 1<<51 message-security assist extension 3
# 77 1<<50 message-security assist extension 4
:
#129 1<<62 vector facility
#134 1<<57 vector packed decimal facility
#135 1<<56 vector enhancements facility 1
#146 1<<45 message-security assist extension 8
#155 1<<36 message-security assist extension 9
kimd :
# 1 1<<62 KIMD-SHA-1
# 2 1<<61 KIMD-SHA-256
# 3 1<<60 KIMD-SHA-512
# 32 1<<31 KIMD-SHA3-224
# 33 1<<30 KIMD-SHA3-256
# 34 1<<29 KIMD-SHA3-384
# 35 1<<28 KIMD-SHA3-512
# 36 1<<27 KIMD-SHAKE-128
# 37 1<<26 KIMD-SHAKE-256
:
# 65 1<<62 KIMD-GHASH
klmd :
# 32 1<<31 KLMD-SHA3-224
# 33 1<<30 KLMD-SHA3-256
# 34 1<<29 KLMD-SHA3-384
# 35 1<<28 KLMD-SHA3-512
# 36 1<<27 KLMD-SHAKE-128
# 37 1<<26 KLMD-SHAKE-256
:
km :
# 18 1<<45 KM-AES-128
# 19 1<<44 KM-AES-192
# 20 1<<43 KM-AES-256
# 50 1<<13 KM-XTS-AES-128
# 52 1<<11 KM-XTS-AES-256
:
kmc :
# 18 1<<45 KMC-AES-128
# 19 1<<44 KMC-AES-192
# 20 1<<43 KMC-AES-256
:
kmac :
# 18 1<<45 KMAC-AES-128
# 19 1<<44 KMAC-AES-192
# 20 1<<43 KMAC-AES-256
:
kmctr:
:
kmo :
# 18 1<<45 KMO-AES-128
# 19 1<<44 KMO-AES-192
# 20 1<<43 KMO-AES-256
:
kmf :
# 18 1<<45 KMF-AES-128
# 19 1<<44 KMF-AES-192
# 20 1<<43 KMF-AES-256
:
prno :
:
kma :
# 18 1<<45 KMA-GCM-AES-128
# 19 1<<44 KMA-GCM-AES-192
# 20 1<<43 KMA-GCM-AES-256
:
pcc :
:
# 64 1<<63 PCC-Scalar-Multiply-P256
# 65 1<<62 PCC-Scalar-Multiply-P384
# 66 1<<61 PCC-Scalar-Multiply-P521
# 72 1<<55 PCC-Scalar-Multiply-Ed25519
# 73 1<<54 PCC-Scalar-Multiply-Ed448
# 80 1<<47 PCC-Scalar-Multiply-X25519
# 81 1<<46 PCC-Scalar-Multiply-X448
kdsa :
# 1 1<<62 KDSA-ECDSA-Verify-P256
# 2 1<<61 KDSA-ECDSA-Verify-P384
# 3 1<<60 KDSA-ECDSA-Verify-P521
# 9 1<<54 KDSA-ECDSA-Sign-P256
# 10 1<<53 KDSA-ECDSA-Sign-P384
# 11 1<<52 KDSA-ECDSA-Sign-P521
# 32 1<<31 KDSA-EdDSA-Verify-Ed25519
# 36 1<<27 KDSA-EdDSA-Verify-Ed448
# 40 1<<23 KDSA-EdDSA-Sign-Ed25519
# 44 1<<19 KDSA-EdDSA-Sign-Ed448
:
RETURN VALUES
Not available.
EXAMPLES
Disables all instruction set extensions which the z196 processor does not implement:
OPENSSL_s390xcap="z196"
Disables the vector facility:
OPENSSL_s390xcap="stfle:~0:~0:~0x4000000000000000"
Disables the KM-XTS-AES and the KIMD-SHAKE function codes:
OPENSSL_s390xcap="km:~0x2800:~0;kimd:~0xc000000:~0"
SEE ALSO
[1] z/Architecture Principles of Operation, SA22-7832-12
COPYRIGHT
Copyright 2018-2020 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (the "License"). You may not use this file except
in compliance with the License. You can obtain a copy in the file LICENSE in the source
distribution or at <https://www.openssl.org/source/license.html>.