154 lines
3.5 KiB
Go
154 lines
3.5 KiB
Go
// Copyright 2019 The Prometheus Authors
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package procfs
|
|
|
|
import (
|
|
"bufio"
|
|
"bytes"
|
|
"fmt"
|
|
"io"
|
|
"strings"
|
|
|
|
"github.com/prometheus/procfs/internal/util"
|
|
)
|
|
|
|
// Crypto holds info parsed from /proc/crypto.
|
|
type Crypto struct {
|
|
Alignmask *uint64
|
|
Async bool
|
|
Blocksize *uint64
|
|
Chunksize *uint64
|
|
Ctxsize *uint64
|
|
Digestsize *uint64
|
|
Driver string
|
|
Geniv string
|
|
Internal string
|
|
Ivsize *uint64
|
|
Maxauthsize *uint64
|
|
MaxKeysize *uint64
|
|
MinKeysize *uint64
|
|
Module string
|
|
Name string
|
|
Priority *int64
|
|
Refcnt *int64
|
|
Seedsize *uint64
|
|
Selftest string
|
|
Type string
|
|
Walksize *uint64
|
|
}
|
|
|
|
// Crypto parses an crypto-file (/proc/crypto) and returns a slice of
|
|
// structs containing the relevant info. More information available here:
|
|
// https://kernel.readthedocs.io/en/sphinx-samples/crypto-API.html
|
|
func (fs FS) Crypto() ([]Crypto, error) {
|
|
path := fs.proc.Path("crypto")
|
|
b, err := util.ReadFileNoStat(path)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error reading crypto %q: %w", path, err)
|
|
}
|
|
|
|
crypto, err := parseCrypto(bytes.NewReader(b))
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error parsing crypto %q: %w", path, err)
|
|
}
|
|
|
|
return crypto, nil
|
|
}
|
|
|
|
// parseCrypto parses a /proc/crypto stream into Crypto elements.
|
|
func parseCrypto(r io.Reader) ([]Crypto, error) {
|
|
var out []Crypto
|
|
|
|
s := bufio.NewScanner(r)
|
|
for s.Scan() {
|
|
text := s.Text()
|
|
switch {
|
|
case strings.HasPrefix(text, "name"):
|
|
// Each crypto element begins with its name.
|
|
out = append(out, Crypto{})
|
|
case text == "":
|
|
continue
|
|
}
|
|
|
|
kv := strings.Split(text, ":")
|
|
if len(kv) != 2 {
|
|
return nil, fmt.Errorf("malformed crypto line: %q", text)
|
|
}
|
|
|
|
k := strings.TrimSpace(kv[0])
|
|
v := strings.TrimSpace(kv[1])
|
|
|
|
// Parse the key/value pair into the currently focused element.
|
|
c := &out[len(out)-1]
|
|
if err := c.parseKV(k, v); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
if err := s.Err(); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return out, nil
|
|
}
|
|
|
|
// parseKV parses a key/value pair into the appropriate field of c.
|
|
func (c *Crypto) parseKV(k, v string) error {
|
|
vp := util.NewValueParser(v)
|
|
|
|
switch k {
|
|
case "async":
|
|
// Interpret literal yes as true.
|
|
c.Async = v == "yes"
|
|
case "blocksize":
|
|
c.Blocksize = vp.PUInt64()
|
|
case "chunksize":
|
|
c.Chunksize = vp.PUInt64()
|
|
case "digestsize":
|
|
c.Digestsize = vp.PUInt64()
|
|
case "driver":
|
|
c.Driver = v
|
|
case "geniv":
|
|
c.Geniv = v
|
|
case "internal":
|
|
c.Internal = v
|
|
case "ivsize":
|
|
c.Ivsize = vp.PUInt64()
|
|
case "maxauthsize":
|
|
c.Maxauthsize = vp.PUInt64()
|
|
case "max keysize":
|
|
c.MaxKeysize = vp.PUInt64()
|
|
case "min keysize":
|
|
c.MinKeysize = vp.PUInt64()
|
|
case "module":
|
|
c.Module = v
|
|
case "name":
|
|
c.Name = v
|
|
case "priority":
|
|
c.Priority = vp.PInt64()
|
|
case "refcnt":
|
|
c.Refcnt = vp.PInt64()
|
|
case "seedsize":
|
|
c.Seedsize = vp.PUInt64()
|
|
case "selftest":
|
|
c.Selftest = v
|
|
case "type":
|
|
c.Type = v
|
|
case "walksize":
|
|
c.Walksize = vp.PUInt64()
|
|
}
|
|
|
|
return vp.Err()
|
|
}
|