The test cases use the following MPI values.
The .data file includes two results, for the cases when
sizeof(mbedtls_mpi_uint) == 4 or 8.
0 1 3 f fe ff 100 ff00 fffe ffff 10000
fffffffe ffffffff 100000000 1f7f7f7f7f7f7f
8000000000000000 fefefefefefefefe fffffffffffffffe ffffffffffffffff
10000000000000000 1234567890abcdef0
fffffffffffffffffefefefefefefefe fffffffffffffffffffffffffffffffe
ffffffffffffffffffffffffffffffff 100000000000000000000000000000000
1234567890abcdef01234567890abcdef0
fffffffffffffffffffffffffffffffffffffffffffffffffefefefefefefefe
fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
10000000000000000000000000000000000000000000000000000000000000000
1234567890abcdef01234567890abcdef01234567890abcdef01234567890abcdef0
4df72d07b4b71c8dacb6cffa954f8d88254b6277099308baf003fab73227f34029643b5a263f66e0d3c3fa297ef71755efd53b8fb6cb812c6bbf7bcf179298bd9947c4c8b14324140a2c0f5fad7958a69050a987a6096e9f055fb38edf0c5889eca4a0cfa99b45fbdeee4c696b328ddceae4723945901ec025076b12b
The lines in the .data file were generated by the following script
#!/usr/bin/env perl
#
# mpi-test-core-sub.pl - generate/run MPI tests in Perl for mbedtls_mpi_core_sub()
#
use strict;
use warnings;
use Math::BigInt;
use sort 'stable';
my @sub_mpis = qw(
0 1 3 f fe ff 100 ff00 fffe ffff 10000
fffffffe ffffffff 100000000 1f7f7f7f7f7f7f
8000000000000000 fefefefefefefefe fffffffffffffffe ffffffffffffffff
10000000000000000 1234567890abcdef0
fffffffffffffffffefefefefefefefe fffffffffffffffffffffffffffffffe ffffffffffffffffffffffffffffffff
100000000000000000000000000000000 1234567890abcdef01234567890abcdef0
fffffffffffffffffffffffffffffffffffffffffffffffffefefefefefefefe
fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
10000000000000000000000000000000000000000000000000000000000000000
1234567890abcdef01234567890abcdef01234567890abcdef01234567890abcdef0
4df72d07b4b71c8dacb6cffa954f8d88254b6277099308baf003fab73227f34029643b5a263f66e0d3c3fa297ef71755efd53b8fb6cb812c6bbf7bcf179298bd9947c4c8b14324140a2c0f5fad7958a69050a987a6096e9f055fb38edf0c5889eca4a0cfa99b45fbdeee4c696b328ddceae4723945901ec025076b12b
);
generate_tests();
sub generate_tests {
generate_mbedtls_mpi_core_sub();
}
sub generate_mbedtls_mpi_core_sub {
my $sub_name = (caller(0))[3]; # e.g. main::generate_mbedtls_mpi_sub_mpi
my ($ignore, $test_name) = split("main::generate_", $sub_name);
my @cases = ();
for my $ah (@sub_mpis) {
for my $bh (@sub_mpis) {
my $a = Math::BigInt->from_hex($ah);
my $b = Math::BigInt->from_hex($bh);
my ($rh4, $rh8, $carry);
if ($a >= $b) {
my $r = $a - $b;
$rh4 = $rh8 = $r->to_hex();
$carry = 0;
} else {
my $r4 = bound_mpi4($b) + $a - $b;
my $r8 = bound_mpi8($b) + $a - $b;
$rh4 = $r4->to_hex();
$rh8 = $r8->to_hex();
$carry = 1;
}
my $desc = "$test_name #NUMBER: 0x$ah - 0x$bh = 0x$rh4/${rh8}EXPLAIN, carry ${carry}";
my $case = output($test_name, str($ah), str($bh), str($rh4), str($rh8), $carry);
push(@cases, [$case, $desc]);
}
}
output_cases(" (for when sizeof(mbedtls_mpi_uint) == 4/8)", @cases);
}
sub output_cases {
my ($explain, @cases) = @_;
my $count = 1;
for my $c (@cases) {
my ($case, $desc, $dep) = @$c;
$desc =~ s/NUMBER/$count/; $count++;
if (defined($explain) && $desc =~ /EXPLAIN/) {
$desc =~ s/EXPLAIN/$explain/;
$explain = "";
}
my $depends = "";
$depends = "depends_on:$dep\n" if defined($dep) && length($dep);
print <<EOF;
$desc
$depends$case
EOF
}
}
# The first number (a power of 2) that won't fit in the number of MPIs
# needed for the given number
sub bound_mpi4 {
my $one = Math::BigInt->new(1); # blsft modifies caller
return $one->blsft(bits_mpi4($_[0]));
}
sub bound_mpi8 {
my $one = Math::BigInt->new(1); # blsft modifies caller
return $one->blsft(bits_mpi8($_[0]));
}
# How many bits (a multiple of 32) needed to store the specified number
# when using 4-byte MPIs
sub bits_mpi4 {
return 32 * mpi4s($_[0]);
}
# How many bits (a multiple of 64) needed to store the specified number
# when using 8-byte MPIs
sub bits_mpi8 {
return 64 * mpi8s($_[0]);
}
# How many 4-byte MPIs needed to store the specified number
sub mpi4s {
my ($n) = @_;
my $h = $n->to_hex();
return int((length($h) + 7) / 8);
}
# How many 8-byte MPIs needed to store the specified number
sub mpi8s {
my ($n) = @_;
my $h = $n->to_hex();
return int((length($h) + 15) / 16);
}
sub output {
return join(":", @_);
}
sub str {
return '"' . $_[0] . '"';
}
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
2a65b85928