--- /dev/null
+#! /usr/bin/env perl
+# Copyright 2022 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
+
+# $output is the last argument if it looks like a file (it has an extension)
+# $flavour is the first argument if it doesn't look like a file
+$output = $#ARGV >= 0 && $ARGV[$#ARGV] =~ m|\.\w+$| ? pop : undef;
+$flavour = $#ARGV >= 0 && $ARGV[0] !~ m|\.| ? shift : undef;
+
+$output and open STDOUT,">$output";
+
+################################################################################
+# Utility functions to help with keeping track of which registers to stack/
+# unstack when entering / exiting routines.
+################################################################################
+{
+ # Callee-saved registers
+ my @callee_saved = map("x$_",(2,8,9,18..27));
+ # Caller-saved registers
+ my @caller_saved = map("x$_",(1,5..7,10..17,28..31));
+ my @must_save;
+ sub use_reg {
+ my $reg = shift;
+ if (grep(/^$reg$/, @callee_saved)) {
+ push(@must_save, $reg);
+ } elsif (!grep(/^$reg$/, @caller_saved)) {
+ # Register is not usable!
+ die("Unusable register ".$reg);
+ }
+ return $reg;
+ }
+ sub use_regs {
+ return map(use_reg("x$_"), @_);
+ }
+ sub save_regs {
+ my $ret = '';
+ my $stack_reservation = ($#must_save + 1) * 8;
+ my $stack_offset = $stack_reservation;
+ if ($stack_reservation % 16) {
+ $stack_reservation += 8;
+ }
+ $ret.=" addi sp,sp,-$stack_reservation\n";
+ foreach (@must_save) {
+ $stack_offset -= 8;
+ $ret.=" sd $_,$stack_offset(sp)\n";
+ }
+ return $ret;
+ }
+ sub load_regs {
+ my $ret = '';
+ my $stack_reservation = ($#must_save + 1) * 8;
+ my $stack_offset = $stack_reservation;
+ if ($stack_reservation % 16) {
+ $stack_reservation += 8;
+ }
+ foreach (@must_save) {
+ $stack_offset -= 8;
+ $ret.=" ld $_,$stack_offset(sp)\n";
+ }
+ $ret.=" addi sp,sp,$stack_reservation\n";
+ return $ret;
+ }
+ sub clear_regs {
+ @must_save = ();
+ }
+}
+
+################################################################################
+# util for encoding scalar crypto extension instructions
+################################################################################
+
+my @regs = map("x$_",(0..31));
+my %reglookup;
+@reglookup{@regs} = @regs;
+
+# Takes a register name, possibly an alias, and converts it to a register index
+# from 0 to 31
+sub read_reg {
+ my $reg = lc shift;
+ if (!exists($reglookup{$reg})) {
+ die("Unknown register ".$reg);
+ }
+ my $regstr = $reglookup{$reg};
+ if (!($regstr =~ /^x([0-9]+)$/)) {
+ die("Could not process register ".$reg);
+ }
+ return $1;
+}
+
+sub rv64_aes64ds {
+ # Encoding for aes64ds rd, rs1, rs2 instruction on RV64
+ # XXXXXXX_ rs2 _ rs1 _XXX_ rd _XXXXXXX
+ my $template = 0b0011101_00000_00000_000_00000_0110011;
+ my $rd = read_reg shift;
+ my $rs1 = read_reg shift;
+ my $rs2 = read_reg shift;
+
+ return ".word ".($template | ($rs2 << 20) | ($rs1 << 15) | ($rd << 7));
+}
+
+sub rv64_aes64dsm {
+ # Encoding for aes64dsm rd, rs1, rs2 instruction on RV64
+ # XXXXXXX_ rs2 _ rs1 _XXX_ rd _XXXXXXX
+ my $template = 0b0011111_00000_00000_000_00000_0110011;
+ my $rd = read_reg shift;
+ my $rs1 = read_reg shift;
+ my $rs2 = read_reg shift;
+
+ return ".word ".($template | ($rs2 << 20) | ($rs1 << 15) | ($rd << 7));
+}
+
+sub rv64_aes64es {
+ # Encoding for aes64es rd, rs1, rs2 instruction on RV64
+ # XXXXXXX_ rs2 _ rs1 _XXX_ rd _XXXXXXX
+ my $template = 0b0011001_00000_00000_000_00000_0110011;
+ my $rd = read_reg shift;
+ my $rs1 = read_reg shift;
+ my $rs2 = read_reg shift;
+
+ return ".word ".($template | ($rs2 << 20) | ($rs1 << 15) | ($rd << 7));
+}
+
+sub rv64_aes64esm {
+ # Encoding for aes64esm rd, rs1, rs2 instruction on RV64
+ # XXXXXXX_ rs2 _ rs1 _XXX_ rd _XXXXXXX
+ my $template = 0b0011011_00000_00000_000_00000_0110011;
+ my $rd = read_reg shift;
+ my $rs1 = read_reg shift;
+ my $rs2 = read_reg shift;
+
+ return ".word ".($template | ($rs2 << 20) | ($rs1 << 15) | ($rd << 7));
+}
+
+sub rv64_aes64im {
+ # Encoding for aes64im rd, rs1 instruction on RV64
+ # XXXXXXXXXXXX_ rs1 _XXX_ rd _XXXXXXX
+ my $template = 0b001100000000_00000_001_00000_0010011;
+ my $rd = read_reg shift;
+ my $rs1 = read_reg shift;
+
+ return ".word ".($template | ($rs1 << 15) | ($rd << 7));
+}
+
+sub rv64_aes64ks1i {
+ # Encoding for aes64ks1i rd, rs1, rnum instruction on RV64
+ # XXXXXXXX_rnum_ rs1 _XXX_ rd _XXXXXXX
+ my $template = 0b00110001_0000_00000_001_00000_0010011;
+ my $rd = read_reg shift;
+ my $rs1 = read_reg shift;
+ my $rnum = shift;
+
+ return ".word ".($template | ($rnum << 20) | ($rs1 << 15) | ($rd << 7));
+}
+
+sub rv64_aes64ks2 {
+ # Encoding for aes64ks2 rd, rs1, rs2 instruction on RV64
+ # XXXXXXX_ rs2 _ rs1 _XXX_ rd _XXXXXXX
+ my $template = 0b0111111_00000_00000_000_00000_0110011;
+ my $rd = read_reg shift;
+ my $rs1 = read_reg shift;
+ my $rs2 = read_reg shift;
+
+ return ".word ".($template | ($rs2 << 20) | ($rs1 << 15) | ($rd << 7));
+}
+################################################################################
+# Register assignment for rv64i_zkne_encrypt and rv64i_zknd_decrypt
+################################################################################
+
+# Registers to hold AES state (called s0-s3 or y0-y3 elsewhere)
+my ($Q0,$Q1,$Q2,$Q3) = use_regs(6..9);
+
+# Function arguments (x10-x12 are a0-a2 in the ABI)
+# Input block pointer, output block pointer, key pointer
+my ($INP,$OUTP,$KEYP) = use_regs(10..12);
+
+# Temporaries
+my ($T0,$T1) = use_regs(13..14);
+
+# Loop counter
+my ($loopcntr) = use_regs(30);
+
+################################################################################
+# void rv64i_zkne_encrypt(const unsigned char *in, unsigned char *out,
+# const AES_KEY *key);
+################################################################################
+my $code .= <<___;
+.text
+.balign 16
+.globl rv64i_zkne_encrypt
+.type rv64i_zkne_encrypt,\@function
+rv64i_zkne_encrypt:
+___
+
+$code .= save_regs();
+
+$code .= <<___;
+
+ # Load input to block cipher
+ ld $Q0,0($INP)
+ ld $Q1,8($INP)
+
+ # Load key
+ ld $T0,0($KEYP)
+ ld $T1,8($KEYP)
+
+ # Load number of rounds
+ lwu $loopcntr,240($KEYP)
+
+ # initial transformation
+ xor $Q0,$Q0,$T0
+ xor $Q1,$Q1,$T1
+
+ # The main loop only executes the first N-1 rounds.
+ add $loopcntr,$loopcntr,-1
+
+ # Do Nr - 1 rounds (final round is special)
+1:
+ @{[rv64_aes64esm $Q2,$Q0,$Q1]}
+ @{[rv64_aes64esm $Q3,$Q1,$Q0]}
+
+ # Update key ptr to point to next key in schedule
+ add $KEYP,$KEYP,16
+
+ # Grab next key in schedule
+ ld $T0,0($KEYP)
+ ld $T1,8($KEYP)
+ xor $Q0,$Q2,$T0
+ xor $Q1,$Q3,$T1
+
+ add $loopcntr,$loopcntr,-1
+ bgtz $loopcntr,1b
+
+ # final round
+ @{[rv64_aes64es $Q2,$Q0,$Q1]}
+ @{[rv64_aes64es $Q3,$Q1,$Q0]}
+
+ # since not added 16 before
+ ld $T0,16($KEYP)
+ ld $T1,24($KEYP)
+ xor $Q0,$Q2,$T0
+ xor $Q1,$Q3,$T1
+
+ sd $Q0,0($OUTP)
+ sd $Q1,8($OUTP)
+
+ # Pop registers and return
+___
+
+$code .= load_regs();
+
+$code .= <<___;
+ ret
+___
+
+################################################################################
+# void rv64i_zknd_decrypt(const unsigned char *in, unsigned char *out,
+# const AES_KEY *key);
+################################################################################
+$code .= <<___;
+.text
+.balign 16
+.globl rv64i_zknd_decrypt
+.type rv64i_zknd_decrypt,\@function
+rv64i_zknd_decrypt:
+___
+
+$code .= save_regs();
+
+$code .= <<___;
+
+ # Load input to block cipher
+ ld $Q0,0($INP)
+ ld $Q1,8($INP)
+
+ # Load number of rounds
+ lwu $loopcntr,240($KEYP)
+
+ # Load the last key
+ slli $T0,$loopcntr,4
+ add $KEYP,$KEYP,$T0
+ ld $T0,0($KEYP)
+ ld $T1,8($KEYP)
+
+ xor $Q0,$Q0,$T0
+ xor $Q1,$Q1,$T1
+
+ # The main loop only executes the first N-1 rounds.
+ add $loopcntr,$loopcntr,-1
+
+ # Do Nr - 1 rounds (final round is special)
+1:
+ @{[rv64_aes64dsm $Q2,$Q0,$Q1]}
+ @{[rv64_aes64dsm $Q3,$Q1,$Q0]}
+
+ # Update key ptr to point to next key in schedule
+ add $KEYP,$KEYP,-16
+
+ # Grab next key in schedule
+ ld $T0,0($KEYP)
+ ld $T1,8($KEYP)
+ xor $Q0,$Q2,$T0
+ xor $Q1,$Q3,$T1
+
+ add $loopcntr,$loopcntr,-1
+ bgtz $loopcntr,1b
+
+ # final round
+ @{[rv64_aes64ds $Q2,$Q0,$Q1]}
+ @{[rv64_aes64ds $Q3,$Q1,$Q0]}
+
+ add $KEYP,$KEYP,-16
+ ld $T0,0($KEYP)
+ ld $T1,8($KEYP)
+ xor $Q0,$Q2,$T0
+ xor $Q1,$Q3,$T1
+
+ sd $Q0,0($OUTP)
+ sd $Q1,8($OUTP)
+ # Pop registers and return
+___
+
+$code .= load_regs();
+
+$code .= <<___;
+ ret
+___
+
+clear_regs();
+
+################################################################################
+# Register assignment for rv64i_zkn[e/d]_set_[en/de]crypt_key
+################################################################################
+
+# Function arguments (x10-x12 are a0-a2 in the ABI)
+# Pointer to user key, number of bits in key, key pointer
+my ($UKEY,$BITS,$KEYP) = use_regs(10..12);
+
+# Temporaries
+my ($T0,$T1,$T2,$T3,$T4) = use_regs(6..8,13..14);
+
+################################################################################
+# utility functions for rv64i_zkne_set_encrypt_key
+################################################################################
+sub ke128enc {
+ my $rnum = 0;
+ my $ret = '';
+$ret .= <<___;
+ ld $T0,0($UKEY)
+ ld $T1,8($UKEY)
+ sd $T0,0($KEYP)
+ sd $T1,8($KEYP)
+___
+ while($rnum < 10) {
+$ret .= <<___;
+ @{[rv64_aes64ks1i $T2,$T1,$rnum]}
+ @{[rv64_aes64ks2 $T0,$T2,$T0]}
+ @{[rv64_aes64ks2 $T1,$T0,$T1]}
+ add $KEYP,$KEYP,16
+ sd $T0,0($KEYP)
+ sd $T1,8($KEYP)
+___
+ $rnum++;
+ }
+ return $ret;
+}
+
+sub ke192enc {
+ my $rnum = 0;
+ my $ret = '';
+$ret .= <<___;
+ ld $T0,0($UKEY)
+ ld $T1,8($UKEY)
+ ld $T2,16($UKEY)
+ sd $T0,0($KEYP)
+ sd $T1,8($KEYP)
+ sd $T2,16($KEYP)
+___
+ while($rnum < 8) {
+$ret .= <<___;
+ @{[rv64_aes64ks1i $T3,$T2,$rnum]}
+ @{[rv64_aes64ks2 $T0,$T3,$T0]}
+ @{[rv64_aes64ks2 $T1,$T0,$T1]}
+___
+ if ($rnum != 7) {
+ # note that (8+1)*24 = 216, (12+1)*16 = 208
+ # thus the last 8 bytes can be dropped
+$ret .= <<___;
+ @{[rv64_aes64ks2 $T2,$T1,$T2]}
+___
+ }
+$ret .= <<___;
+ add $KEYP,$KEYP,24
+ sd $T0,0($KEYP)
+ sd $T1,8($KEYP)
+___
+ if ($rnum != 7) {
+$ret .= <<___;
+ sd $T2,16($KEYP)
+___
+ }
+ $rnum++;
+ }
+ return $ret;
+}
+
+sub ke256enc {
+ my $rnum = 0;
+ my $ret = '';
+$ret .= <<___;
+ ld $T0,0($UKEY)
+ ld $T1,8($UKEY)
+ ld $T2,16($UKEY)
+ ld $T3,24($UKEY)
+ sd $T0,0($KEYP)
+ sd $T1,8($KEYP)
+ sd $T2,16($KEYP)
+ sd $T3,24($KEYP)
+___
+ while($rnum < 7) {
+$ret .= <<___;
+ @{[rv64_aes64ks1i $T4,$T3,$rnum]}
+ @{[rv64_aes64ks2 $T0,$T4,$T0]}
+ @{[rv64_aes64ks2 $T1,$T0,$T1]}
+ add $KEYP,$KEYP,32
+ sd $T0,0($KEYP)
+ sd $T1,8($KEYP)
+___
+ if ($rnum != 6) {
+ # note that (7+1)*32 = 256, (14+1)*16 = 240
+ # thus the last 16 bytes can be dropped
+$ret .= <<___;
+ @{[rv64_aes64ks1i $T4,$T1,0xA]}
+ @{[rv64_aes64ks2 $T2,$T4,$T2]}
+ @{[rv64_aes64ks2 $T3,$T2,$T3]}
+ sd $T2,16($KEYP)
+ sd $T3,24($KEYP)
+___
+ }
+ $rnum++;
+ }
+ return $ret;
+}
+
+################################################################################
+# void rv64i_zkne_set_encrypt_key(const unsigned char *userKey, const int bits,
+# AES_KEY *key)
+################################################################################
+sub AES_set_common {
+ my ($ke128, $ke192, $ke256) = @_;
+ my $ret = '';
+$ret .= <<___;
+ bnez $UKEY,1f # if (!userKey || !key) return -1;
+ bnez $KEYP,1f
+ li a0,-1
+ ret
+1:
+ # Determine number of rounds from key size in bits
+ li $T0,128
+ bne $BITS,$T0,1f
+ li $T1,10 # key->rounds = 10 if bits == 128
+ sw $T1,240($KEYP) # store key->rounds
+$ke128
+ j 4f
+1:
+ li $T0,192
+ bne $BITS,$T0,2f
+ li $T1,12 # key->rounds = 12 if bits == 192
+ sw $T1,240($KEYP) # store key->rounds
+$ke192
+ j 4f
+2:
+ li $T1,14 # key->rounds = 14 if bits == 256
+ li $T0,256
+ beq $BITS,$T0,3f
+ li a0,-2 # If bits != 128, 192, or 256, return -2
+ j 5f
+3:
+ sw $T1,240($KEYP) # store key->rounds
+$ke256
+4: # return 0
+ li a0,0
+5: # return a0
+___
+ return $ret;
+}
+$code .= <<___;
+.text
+.balign 16
+.globl rv64i_zkne_set_encrypt_key
+.type rv64i_zkne_set_encrypt_key,\@function
+rv64i_zkne_set_encrypt_key:
+___
+$code .= save_regs();
+$code .= AES_set_common(ke128enc(), ke192enc(),ke256enc());
+$code .= load_regs();
+$code .= <<___;
+ ret
+___
+
+################################################################################
+# utility functions for rv64i_zknd_set_decrypt_key
+################################################################################
+sub ke128dec {
+ my $rnum = 0;
+ my $ret = '';
+$ret .= <<___;
+ ld $T0,0($UKEY)
+ ld $T1,8($UKEY)
+ sd $T0,0($KEYP)
+ sd $T1,8($KEYP)
+___
+ while($rnum < 10) {
+$ret .= <<___;
+ @{[rv64_aes64ks1i $T2,$T1,$rnum]}
+ @{[rv64_aes64ks2 $T0,$T2,$T0]}
+ @{[rv64_aes64ks2 $T1,$T0,$T1]}
+ add $KEYP,$KEYP,16
+___
+ # need to aes64im for [1:N-1] round keys
+ # this is from the fact that aes64dsm subwords first then mix column
+ # intuitively decryption needs to first mix column then subwords
+ # however, for merging datapaths (encryption first subwords then mix column)
+ # aes64dsm chooses to inverse the order of them, thus
+ # transform should then be done on the round key
+ if ($rnum < 9) {
+$ret .= <<___;
+ @{[rv64_aes64im $T2,$T0]}
+ sd $T2,0($KEYP)
+ @{[rv64_aes64im $T2,$T1]}
+ sd $T2,8($KEYP)
+___
+ } else {
+$ret .= <<___;
+ sd $T0,0($KEYP)
+ sd $T1,8($KEYP)
+___
+ }
+ $rnum++;
+ }
+ return $ret;
+}
+
+sub ke192dec {
+ my $rnum = 0;
+ my $ret = '';
+$ret .= <<___;
+ ld $T0,0($UKEY)
+ ld $T1,8($UKEY)
+ ld $T2,16($UKEY)
+ sd $T0,0($KEYP)
+ sd $T1,8($KEYP)
+ @{[rv64_aes64im $T3,$T2]}
+ sd $T3,16($KEYP)
+___
+ while($rnum < 8) {
+$ret .= <<___;
+ @{[rv64_aes64ks1i $T3,$T2,$rnum]}
+ @{[rv64_aes64ks2 $T0,$T3,$T0]}
+ @{[rv64_aes64ks2 $T1,$T0,$T1]}
+ add $KEYP,$KEYP,24
+___
+ if ($rnum < 7) {
+$ret .= <<___;
+ @{[rv64_aes64im $T3,$T0]}
+ sd $T3,0($KEYP)
+ @{[rv64_aes64im $T3,$T1]}
+ sd $T3,8($KEYP)
+ # the reason is in ke192enc
+ @{[rv64_aes64ks2 $T2,$T1,$T2]}
+ @{[rv64_aes64im $T3,$T2]}
+ sd $T3,16($KEYP)
+___
+ } else { # rnum == 7
+$ret .= <<___;
+ sd $T0,0($KEYP)
+ sd $T1,8($KEYP)
+___
+ }
+ $rnum++;
+ }
+ return $ret;
+}
+
+sub ke256dec {
+ my $rnum = 0;
+ my $ret = '';
+$ret .= <<___;
+ ld $T0,0($UKEY)
+ ld $T1,8($UKEY)
+ ld $T2,16($UKEY)
+ ld $T3,24($UKEY)
+ sd $T0,0($KEYP)
+ sd $T1,8($KEYP)
+ @{[rv64_aes64im $T4,$T2]}
+ sd $T4,16($KEYP)
+ @{[rv64_aes64im $T4,$T3]}
+ sd $T4,24($KEYP)
+___
+ while($rnum < 7) {
+$ret .= <<___;
+ @{[rv64_aes64ks1i $T4,$T3,$rnum]}
+ @{[rv64_aes64ks2 $T0,$T4,$T0]}
+ @{[rv64_aes64ks2 $T1,$T0,$T1]}
+ add $KEYP,$KEYP,32
+___
+ if ($rnum < 6) {
+$ret .= <<___;
+ @{[rv64_aes64ks1i $T4,$T1,0xA]}
+ @{[rv64_aes64ks2 $T2,$T4,$T2]}
+ @{[rv64_aes64ks2 $T3,$T2,$T3]}
+ @{[rv64_aes64im $T4,$T0]}
+ sd $T4,0($KEYP)
+ @{[rv64_aes64im $T4,$T1]}
+ sd $T4,8($KEYP)
+ @{[rv64_aes64im $T4,$T2]}
+ sd $T4,16($KEYP)
+ @{[rv64_aes64im $T4,$T3]}
+ sd $T4,24($KEYP)
+___
+ } else {
+$ret .= <<___;
+ sd $T0,0($KEYP)
+ sd $T1,8($KEYP)
+ # last two one dropped
+___
+ }
+ $rnum++;
+ }
+ return $ret;
+}
+
+################################################################################
+# void rv64i_zknd_set_decrypt_key(const unsigned char *userKey, const int bits,
+# AES_KEY *key)
+################################################################################
+$code .= <<___;
+.text
+.balign 16
+.globl rv64i_zknd_set_decrypt_key
+.type rv64i_zknd_set_decrypt_key,\@function
+rv64i_zknd_set_decrypt_key:
+___
+$code .= save_regs();
+$code .= AES_set_common(ke128dec(), ke192dec(),ke256dec());
+$code .= load_regs();
+$code .= <<___;
+ ret
+___
+
+print $code;
+close STDOUT or die "error closing STDOUT: $!";
projects / thirdparty / openssl.git / commitdiff
