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627054d246
This silences all of the "should have a package comment" lint warnings from golangci-lint. Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
47 lines
1.1 KiB
Go
47 lines
1.1 KiB
Go
// Package keys provides helpers for Linux keyrings.
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package keys
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import (
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"errors"
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"fmt"
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"strconv"
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"strings"
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"golang.org/x/sys/unix"
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)
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type KeySerial uint32
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func JoinSessionKeyring(name string) (KeySerial, error) {
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sessKeyID, err := unix.KeyctlJoinSessionKeyring(name)
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if err != nil {
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return 0, fmt.Errorf("unable to create session key: %w", err)
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}
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return KeySerial(sessKeyID), nil
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}
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// ModKeyringPerm modifies permissions on a keyring by reading the current permissions,
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// anding the bits with the given mask (clearing permissions) and setting
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// additional permission bits
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func ModKeyringPerm(ringID KeySerial, mask, setbits uint32) error {
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dest, err := unix.KeyctlString(unix.KEYCTL_DESCRIBE, int(ringID))
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if err != nil {
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return err
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}
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res := strings.Split(dest, ";")
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if len(res) < 5 {
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return errors.New("Destination buffer for key description is too small")
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}
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// parse permissions
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perm64, err := strconv.ParseUint(res[3], 16, 32)
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if err != nil {
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return err
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}
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perm := (uint32(perm64) & mask) | setbits
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return unix.KeyctlSetperm(int(ringID), perm)
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}
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