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Significant refactor of the create in case of MySQL 8 and caching_sha2_password plugin.

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The problem is that when caching_sha2_password is used the character utilised in the string may be invalid for MySQL itself to process during creation time.
Given that the password must be converted to HEX and then pushed as binary using the AS <bin password> format
This commit is contained in:
Marco Tusa
2023-09-22 17:18:23 +02:00
parent 3be972e518
commit b9be38d3a0
1 changed files with 12 additions and 0 deletions
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12
bin/pt-show-grants
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@@ -2050,6 +2050,14 @@ sub main {
}
if ($#create_user >= 0){
PTDEBUG && _d('CreateUser:', Dumper(\@create_user));
#given caching_sha2_password issue we need to select the password in binary format and replace the one coming from the create
my $query = "SELECT authentication_string sha2 from mysql.user where user='$u->{User}' and host='$u->{Host}'";
PTDEBUG && _d('get password:', Dumper($query));
my ( $pw_sha2) = $dbh->selectrow_array($query);
my $pw_bin = $pw_sha2;
$pw_bin =~ s/(.)/sprintf '%02X', ord $1/seg;
$pw_bin = "0x".$pw_bin;
# make this replication safe converting the CREATE USER into
# CREATE USER IF NOT EXISTS and then doing an ALTER USER
my $create = $create_user[0];
@@ -2057,6 +2065,10 @@ sub main {
$create =~ s{CREATE USER}{CREATE USER IF NOT EXISTS};
$create =~ s{ IDENTIFIED VIA }{ IDENTIFIED AS };
$create =~ s{ BY }{ AS };
if ( $create =~ m/caching_sha2_password/ ) {
print "-- Converting $user_host caching_sha2_password to binary for correct export/import\n";
$create =~ s/\sAS\s.*'\s|$/ AS $pw_bin /g;
}
$alter =~ s{CREATE USER}{ALTER USER};
# Alter user should not be pass in the latest MySQL version
#we need to cleanup other MariaDB diversions