205 lines
5.8 KiB
Plaintext
205 lines
5.8 KiB
Plaintext
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=pod
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=head1 NAME
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OPENSSL_s390xcap - the IBM z processor capabilities vector
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=head1 SYNOPSIS
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env OPENSSL_s390xcap=... <application>
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=head1 DESCRIPTION
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libcrypto supports z/Architecture instruction set extensions. These
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extensions are denoted by individual bits in the capabilities vector.
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When libcrypto is initialized, the bits returned by the STFLE instruction
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and by the QUERY functions are stored in the vector.
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To change the set of instructions available to an application, you can
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set the B<OPENSSL_s390xcap> environment variable before you start the
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application. After initialization, the capability vector is ANDed bitwise
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with a mask which is derived from the environment variable.
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The environment variable is a semicolon-separated list of tokens which is
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processed from left to right (whitespace is ignored):
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OPENSSL_s390xcap="<tok1>;<tok2>;..."
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There are four types of tokens:
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=over 4
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=item <string>
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The name of a processor generation. A bit in the environment variable's
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mask is set to one if and only if the specified processor generation
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implements the corresponding instruction set extension. Possible values
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are B<z900>, B<z990>, B<z9>, B<z10>, B<z196>, B<zEC12>, B<z13>, B<z14>,
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B<z15>, and B<z16>.
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=item <string>:<mask>:<mask>
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The name of an instruction followed by two 64-bit masks. The part of the
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environment variable's mask corresponding to the specified instruction is
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set to the specified 128-bit mask. Possible values are B<kimd>, B<klmd>,
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B<km>, B<kmc>, B<kmac>, B<kmctr>, B<kmo>, B<kmf>, B<prno>, B<kma>, B<pcc>
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and B<kdsa>.
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=item stfle:<mask>:<mask>:<mask>
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Store-facility-list-extended (stfle) followed by three 64-bit masks. The
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part of the environment variable's mask corresponding to the stfle
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instruction is set to the specified 192-bit mask.
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=item nocex
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Deactivate modular exponentiation and CRT operation offloading to
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Crypto Express Adapters.
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=back
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The 64-bit masks are specified in hexadecimal notation. The 0x prefix is
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optional. Prefix a mask with a tilde, C<~>, to denote a bitwise NOT operation.
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The following is a list of significant bits for each instruction. Colon
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rows separate the individual 64-bit masks. The bit numbers in the first
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column are consistent with [1], that is, 0 denotes the leftmost bit and
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the numbering is continuous across 64-bit mask boundaries.
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Bit Mask Facility/Function
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stfle:
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# 17 1<<46 message-security assist
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# 25 1<<38 store-clock-fast facility
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:
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# 76 1<<51 message-security assist extension 3
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# 77 1<<50 message-security assist extension 4
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:
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#129 1<<62 vector facility
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#134 1<<57 vector packed decimal facility
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#135 1<<56 vector enhancements facility 1
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#146 1<<45 message-security assist extension 8
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#155 1<<36 message-security assist extension 9
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kimd :
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# 1 1<<62 KIMD-SHA-1
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# 2 1<<61 KIMD-SHA-256
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# 3 1<<60 KIMD-SHA-512
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# 32 1<<31 KIMD-SHA3-224
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# 33 1<<30 KIMD-SHA3-256
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# 34 1<<29 KIMD-SHA3-384
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# 35 1<<28 KIMD-SHA3-512
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# 36 1<<27 KIMD-SHAKE-128
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# 37 1<<26 KIMD-SHAKE-256
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:
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# 65 1<<62 KIMD-GHASH
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klmd :
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# 32 1<<31 KLMD-SHA3-224
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# 33 1<<30 KLMD-SHA3-256
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# 34 1<<29 KLMD-SHA3-384
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# 35 1<<28 KLMD-SHA3-512
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# 36 1<<27 KLMD-SHAKE-128
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# 37 1<<26 KLMD-SHAKE-256
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:
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km :
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# 18 1<<45 KM-AES-128
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# 19 1<<44 KM-AES-192
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# 20 1<<43 KM-AES-256
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# 50 1<<13 KM-XTS-AES-128
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# 52 1<<11 KM-XTS-AES-256
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:
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kmc :
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# 18 1<<45 KMC-AES-128
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# 19 1<<44 KMC-AES-192
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# 20 1<<43 KMC-AES-256
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:
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kmac :
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# 18 1<<45 KMAC-AES-128
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# 19 1<<44 KMAC-AES-192
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# 20 1<<43 KMAC-AES-256
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:
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kmctr:
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:
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kmo :
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# 18 1<<45 KMO-AES-128
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# 19 1<<44 KMO-AES-192
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# 20 1<<43 KMO-AES-256
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:
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kmf :
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# 18 1<<45 KMF-AES-128
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# 19 1<<44 KMF-AES-192
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# 20 1<<43 KMF-AES-256
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:
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prno :
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:
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kma :
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# 18 1<<45 KMA-GCM-AES-128
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# 19 1<<44 KMA-GCM-AES-192
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# 20 1<<43 KMA-GCM-AES-256
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:
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pcc :
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:
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# 64 1<<63 PCC-Scalar-Multiply-P256
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# 65 1<<62 PCC-Scalar-Multiply-P384
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# 66 1<<61 PCC-Scalar-Multiply-P521
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# 72 1<<55 PCC-Scalar-Multiply-Ed25519
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# 73 1<<54 PCC-Scalar-Multiply-Ed448
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# 80 1<<47 PCC-Scalar-Multiply-X25519
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# 81 1<<46 PCC-Scalar-Multiply-X448
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kdsa :
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# 1 1<<62 KDSA-ECDSA-Verify-P256
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# 2 1<<61 KDSA-ECDSA-Verify-P384
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# 3 1<<60 KDSA-ECDSA-Verify-P521
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# 9 1<<54 KDSA-ECDSA-Sign-P256
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# 10 1<<53 KDSA-ECDSA-Sign-P384
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# 11 1<<52 KDSA-ECDSA-Sign-P521
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# 32 1<<31 KDSA-EdDSA-Verify-Ed25519
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# 36 1<<27 KDSA-EdDSA-Verify-Ed448
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# 40 1<<23 KDSA-EdDSA-Sign-Ed25519
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# 44 1<<19 KDSA-EdDSA-Sign-Ed448
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:
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=head1 RETURN VALUES
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Not available.
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=head1 EXAMPLES
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Disables all instruction set extensions which the z196 processor does not implement:
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OPENSSL_s390xcap="z196"
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Disables the vector facility:
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OPENSSL_s390xcap="stfle:~0:~0:~0x4000000000000000"
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Disables the KM-XTS-AES and the KIMD-SHAKE function codes:
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OPENSSL_s390xcap="km:~0x2800:~0;kimd:~0xc000000:~0"
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=head1 SEE ALSO
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[1] z/Architecture Principles of Operation, SA22-7832-12
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=head1 COPYRIGHT
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Copyright 2018-2023 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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