refactor/dependence: Upgrade Golang version and dependencies. (#322)

* chore: Set up automated package updates with dependabot.
This commit is contained in:
ᴍᴏᴏɴD4ʀᴋ 2024-04-12 19:57:32 +08:00
parent 536f2082f9
commit 06fc064418
12 changed files with 123 additions and 69 deletions

15
.github/dependabot.yml vendored Normal file
View File

@ -0,0 +1,15 @@
version: 2
updates:
- package-ecosystem: "gomod"
directory: "/"
schedule:
interval: "weekly"
open-pull-requests-limit: 10
# ignore:
# - dependency-name: "example-package"
# versions: ["2.x.x"]
- package-ecosystem: "github-actions"
directory: "/"
schedule:
interval: "monthly"
open-pull-requests-limit: 5

View File

@ -14,7 +14,7 @@ jobs:
strategy:
matrix:
os: [ubuntu-latest, windows-latest, macos-latest]
goVer: ["1.21.x"]
goVer: ["1.22.x"]
steps:
- name: Check out code into the Go module directory

View File

@ -16,7 +16,7 @@ jobs:
- name: Set Golang
uses: actions/setup-go@v5
with:
go-version: "1.21.x"
go-version: "1.22.x"
cache: false
- name: Check spelling with custom config file

View File

@ -13,7 +13,7 @@ jobs:
- name: Use Golang
uses: actions/setup-go@v5
with:
go-version: "1.21.x"
go-version: "1.22.x"
- name: Build with xgo
uses: crazy-max/ghaction-xgo@v2

View File

@ -10,7 +10,7 @@ jobs:
test:
strategy:
matrix:
go-version: [ "1.21.x" ]
go-version: [ "1.22.x" ]
platform: [ubuntu-latest]
runs-on: ${{ matrix.platform }}
steps:
@ -33,7 +33,7 @@ jobs:
if: success()
uses: actions/setup-go@v5
with:
go-version: "1.21.x"
go-version: "1.22.x"
- name: Checkout code
uses: actions/checkout@v4
- name: Calc coverage

1
.gitignore vendored
View File

@ -205,3 +205,4 @@ hack-browser-data
# CICD Config
!.typos.toml
!.github/*.yml

View File

@ -12,9 +12,8 @@ import (
"os/exec"
"strings"
"golang.org/x/crypto/pbkdf2"
"github.com/moond4rk/hackbrowserdata/types"
"github.com/moond4rk/hackbrowserdata/utils/cryptoutil"
)
var (
@ -50,7 +49,7 @@ func (c *Chromium) GetMasterKey() ([]byte, error) {
}
salt := []byte("saltysalt")
// @https://source.chromium.org/chromium/chromium/src/+/master:components/os_crypt/os_crypt_mac.mm;l=157
key := pbkdf2.Key(secret, salt, 1003, 16, sha1.New)
key := cryptoutil.PBKDF2Key(secret, salt, 1003, 16, sha1.New)
if key == nil {
return nil, errWrongSecurityCommand
}

View File

@ -10,9 +10,9 @@ import (
"github.com/godbus/dbus/v5"
keyring "github.com/ppacher/go-dbus-keyring"
"golang.org/x/crypto/pbkdf2"
"github.com/moond4rk/hackbrowserdata/types"
"github.com/moond4rk/hackbrowserdata/utils/cryptoutil"
)
func (c *Chromium) GetMasterKey() ([]byte, error) {
@ -69,7 +69,7 @@ func (c *Chromium) GetMasterKey() ([]byte, error) {
}
salt := []byte("saltysalt")
// @https://source.chromium.org/chromium/chromium/src/+/master:components/os_crypt/os_crypt_linux.cc
key := pbkdf2.Key(secret, salt, 1, 16, sha1.New)
key := cryptoutil.PBKDF2Key(secret, salt, 1, 16, sha1.New)
c.masterKey = key
slog.Info("get master key success", "browser", c.name)
return key, nil

View File

@ -7,7 +7,7 @@ import (
"encoding/asn1"
"errors"
"golang.org/x/crypto/pbkdf2"
"github.com/moond4rk/hackbrowserdata/utils/cryptoutil"
)
type ASN1PBE interface {
@ -158,7 +158,7 @@ func (m metaPBE) deriveKeyAndIV(globalSalt []byte) ([]byte, []byte) {
iter := m.AlgoAttr.Data.Data.SlatAttr.IterationCount
keyLen := m.AlgoAttr.Data.Data.SlatAttr.KeySize
key := pbkdf2.Key(password[:], salt, iter, keyLen, sha256.New)
key := cryptoutil.PBKDF2Key(password[:], salt, iter, keyLen, sha256.New)
iv := append([]byte{4, 14}, m.AlgoAttr.Data.IVData.IV...)
return key, iv
}

25
go.mod
View File

@ -1,6 +1,6 @@
module github.com/moond4rk/hackbrowserdata
go 1.21
go 1.22
require (
github.com/DATA-DOG/go-sqlmock v1.5.2
@ -8,13 +8,12 @@ require (
github.com/godbus/dbus/v5 v5.1.0
github.com/otiai10/copy v1.14.0
github.com/ppacher/go-dbus-keyring v1.0.1
github.com/stretchr/testify v1.8.4
github.com/stretchr/testify v1.9.0
github.com/syndtr/goleveldb v1.0.0
github.com/tidwall/gjson v1.17.0
github.com/tidwall/gjson v1.17.1
github.com/urfave/cli/v2 v2.27.1
golang.org/x/crypto v0.18.0
golang.org/x/text v0.14.0
modernc.org/sqlite v1.28.0
modernc.org/sqlite v1.29.6
)
require (
@ -23,26 +22,22 @@ require (
github.com/dustin/go-humanize v1.0.1 // indirect
github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db // indirect
github.com/google/uuid v1.3.0 // indirect
github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 // indirect
github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
github.com/mattn/go-isatty v0.0.16 // indirect
github.com/ncruces/go-strftime v0.1.9 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
github.com/russross/blackfriday/v2 v2.1.0 // indirect
github.com/tidwall/match v1.1.1 // indirect
github.com/tidwall/pretty v1.2.0 // indirect
github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
golang.org/x/mod v0.8.0 // indirect
golang.org/x/sync v0.3.0 // indirect
golang.org/x/sys v0.16.0 // indirect
golang.org/x/tools v0.6.0 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
lukechampine.com/uint128 v1.2.0 // indirect
modernc.org/cc/v3 v3.40.0 // indirect
modernc.org/ccgo/v3 v3.16.13 // indirect
modernc.org/libc v1.29.0 // indirect
modernc.org/gc/v3 v3.0.0-20240107210532-573471604cb6 // indirect
modernc.org/libc v1.41.0 // indirect
modernc.org/mathutil v1.6.0 // indirect
modernc.org/memory v1.7.2 // indirect
modernc.org/opt v0.1.3 // indirect
modernc.org/strutil v1.1.3 // indirect
modernc.org/token v1.0.1 // indirect
modernc.org/strutil v1.2.0 // indirect
modernc.org/token v1.1.0 // indirect
)

69
go.sum
View File

@ -15,21 +15,21 @@ github.com/godbus/dbus/v5 v5.1.0/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5x
github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db h1:woRePGFeVFfLKN/pOkfl+p/TAqKOfFu+7KPlMVpok/w=
github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
github.com/google/pprof v0.0.0-20221118152302-e6195bd50e26 h1:Xim43kblpZXfIBQsbuBVKCudVG457BR2GZFIz3uw3hQ=
github.com/google/pprof v0.0.0-20221118152302-e6195bd50e26/go.mod h1:dDKJzRmX4S37WGHujM7tX//fmj1uioxKzKxz3lo4HJo=
github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
github.com/hashicorp/golang-lru/v2 v2.0.7 h1:a+bsQ5rvGLjzHuww6tVxozPZFVghXaHOwFs4luLUK2k=
github.com/hashicorp/golang-lru/v2 v2.0.7/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyfM2/ZepoAG6RGpeM=
github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 h1:Z9n2FFNUXsshfwJMBgNA0RU6/i7WVaAegv3PtuIHPMs=
github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51/go.mod h1:CzGEWj7cYgsdH8dAjBGEr58BoE7ScuLd+fwFZ44+/x8=
github.com/kisielk/sqlstruct v0.0.0-20201105191214-5f3e10d3ab46/go.mod h1:yyMNCyc/Ib3bDTKd379tNMpB/7/H5TjM2Y9QJ5THLbE=
github.com/mattn/go-isatty v0.0.16 h1:bq3VjFmv/sOjHtdEhmkEV4x1AJtvUvOJ2PFAZ5+peKQ=
github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
github.com/mattn/go-sqlite3 v1.14.16 h1:yOQRA0RpS5PFz/oikGwBEqvAWhWg5ufRz4ETLjwpU1Y=
github.com/mattn/go-sqlite3 v1.14.16/go.mod h1:2eHXhiwb8IkHr+BDWZGa96P6+rkvnG63S2DGjv9HUNg=
github.com/mattn/go-sqlite3 v1.14.22 h1:2gZY6PC6kBnID23Tichd1K+Z0oS6nE/XwU+Vz/5o4kU=
github.com/mattn/go-sqlite3 v1.14.22/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
github.com/ncruces/go-strftime v0.1.9 h1:bY0MQC28UADQmHmaF5dgpLmImcShSi2kHU9XLdhx/f4=
github.com/ncruces/go-strftime v0.1.9/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
github.com/onsi/ginkgo v1.7.0 h1:WSHQ+IS43OoUrWtD1/bbclrwK8TTH5hzp+umCiuxHgs=
github.com/onsi/ginkgo v1.7.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
@ -47,12 +47,12 @@ github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
github.com/syndtr/goleveldb v1.0.0 h1:fBdIW9lB4Iz0n9khmH8w27SJ3QEJ7+IgjPEwGSZiFdE=
github.com/syndtr/goleveldb v1.0.0/go.mod h1:ZVVdQEZoIme9iO1Ch2Jdy24qqXrMMOU6lpPAyBWyWuQ=
github.com/tidwall/gjson v1.17.0 h1:/Jocvlh98kcTfpN2+JzGQWQcqrPQwDrVEMApx/M5ZwM=
github.com/tidwall/gjson v1.17.0/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
github.com/tidwall/gjson v1.17.1 h1:wlYEnwqAHgzmhNUFfw7Xalt2JzQvsMx2Se4PcoFCT/U=
github.com/tidwall/gjson v1.17.1/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
github.com/tidwall/match v1.1.1 h1:+Ho715JplO36QYgwN9PGYNhgZvoUSc9X2c80KVTi+GA=
github.com/tidwall/match v1.1.1/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JTxsfmM=
github.com/tidwall/pretty v1.2.0 h1:RWIZEg2iJ8/g6fDDYzMpobmaoGh5OLl4AXtGUGPcqCs=
@ -61,13 +61,10 @@ github.com/urfave/cli/v2 v2.27.1 h1:8xSQ6szndafKVRmfyeUMxkNUJQMjL1F2zmsZ+qHpfho=
github.com/urfave/cli/v2 v2.27.1/go.mod h1:8qnjx1vcq5s2/wpsqoZFndg2CE5tNFyrTvS6SinrnYQ=
github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 h1:bAn7/zixMGCfxrRTfdpNzjtPYqr8smhKouy9mxVdGPU=
github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsrSj3ccvlPHLoLsHnpR27oXr4ZE984MbSER8=
golang.org/x/crypto v0.18.0 h1:PGVlW0xEltQnzFZ55hkuX5+KLyrMYhHld1YHO4AKcdc=
golang.org/x/crypto v0.18.0/go.mod h1:R0j02AL6hcrfOiy9T4ZYp/rcWeMxM3L6QYxlOuEG1mg=
golang.org/x/mod v0.8.0 h1:LUYupSeNrTNCGzR/hVBk2NHZO4hXcVaW1k4Qx7rjPx8=
golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
golang.org/x/mod v0.14.0 h1:dGoOF9QVLYng8IHTm7BAyWqCqSheQ5pYWGhzW00YJr0=
golang.org/x/mod v0.14.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
golang.org/x/net v0.0.0-20180906233101-161cd47e91fd h1:nTDtHvHSdCn1m6ITfMRqtOd/9+7a3s8RBNOZ3eYZzJA=
golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.10.0 h1:X2//UzNDwYmtCLn7To6G58Wr6f5ahEAQgKNzv9Y951M=
golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E=
golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
@ -78,8 +75,8 @@ golang.org/x/sys v0.16.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
golang.org/x/tools v0.6.0 h1:BOw41kyTf3PuCW1pVQf8+Cyg8pMlkYB1oo9iJ6D/lKM=
golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
golang.org/x/tools v0.17.0 h1:FvmRgNOcs3kOa+T20R1uhfP9F6HgG2mfxDv1vrx1Htc=
golang.org/x/tools v0.17.0/go.mod h1:xsh6VxdV005rRVaS6SSAf9oiAqljS7UZUacMZ8Bnsps=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
@ -90,31 +87,19 @@ gopkg.in/yaml.v2 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
lukechampine.com/uint128 v1.2.0 h1:mBi/5l91vocEN8otkC5bDLhi2KdCticRiwbdB0O+rjI=
lukechampine.com/uint128 v1.2.0/go.mod h1:c4eWIwlEGaxC/+H1VguhU4PHXNWDCDMUlWdIWl2j1gk=
modernc.org/cc/v3 v3.40.0 h1:P3g79IUS/93SYhtoeaHW+kRCIrYaxJ27MFPv+7kaTOw=
modernc.org/cc/v3 v3.40.0/go.mod h1:/bTg4dnWkSXowUO6ssQKnOV0yMVxDYNIsIrzqTFDGH0=
modernc.org/ccgo/v3 v3.16.13 h1:Mkgdzl46i5F/CNR/Kj80Ri59hC8TKAhZrYSaqvkwzUw=
modernc.org/ccgo/v3 v3.16.13/go.mod h1:2Quk+5YgpImhPjv2Qsob1DnZ/4som1lJTodubIcoUkY=
modernc.org/ccorpus v1.11.6 h1:J16RXiiqiCgua6+ZvQot4yUuUy8zxgqbqEEUuGPlISk=
modernc.org/ccorpus v1.11.6/go.mod h1:2gEUTrWqdpH2pXsmTM1ZkjeSrUWDpjMu2T6m29L/ErQ=
modernc.org/httpfs v1.0.6 h1:AAgIpFZRXuYnkjftxTAZwMIiwEqAfk8aVB2/oA6nAeM=
modernc.org/httpfs v1.0.6/go.mod h1:7dosgurJGp0sPaRanU53W4xZYKh14wfzX420oZADeHM=
modernc.org/libc v1.29.0 h1:tTFRFq69YKCF2QyGNuRUQxKBm1uZZLubf6Cjh/pVHXs=
modernc.org/libc v1.29.0/go.mod h1:DaG/4Q3LRRdqpiLyP0C2m1B8ZMGkQ+cCgOIjEtQlYhQ=
modernc.org/fileutil v1.3.0 h1:gQ5SIzK3H9kdfai/5x41oQiKValumqNTDXMvKo62HvE=
modernc.org/fileutil v1.3.0/go.mod h1:XatxS8fZi3pS8/hKG2GH/ArUogfxjpEKs3Ku3aK4JyQ=
modernc.org/gc/v3 v3.0.0-20240107210532-573471604cb6 h1:5D53IMaUuA5InSeMu9eJtlQXS2NxAhyWQvkKEgXZhHI=
modernc.org/gc/v3 v3.0.0-20240107210532-573471604cb6/go.mod h1:Qz0X07sNOR1jWYCrJMEnbW/X55x206Q7Vt4mz6/wHp4=
modernc.org/libc v1.41.0 h1:g9YAc6BkKlgORsUWj+JwqoB1wU3o4DE3bM3yvA3k+Gk=
modernc.org/libc v1.41.0/go.mod h1:w0eszPsiXoOnoMJgrXjglgLuDy/bt5RR4y3QzUUeodY=
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package cryptoutil
import (
"crypto/hmac"
"hash"
)
// PBKDF2Key derives a key from the password, salt and iteration count, returning a
// []byte of length keylen that can be used as cryptographic key. The key is
// derived based on the method described as PBKDF2 with the HMAC variant using
// the supplied hash function.
//
// For example, to use a HMAC-SHA-1 based PBKDF2 key derivation function, you
// can get a derived key for e.g. AES-256 (which needs a 32-byte key) by
// doing:
//
// dk := pbkdf2.Key([]byte("some password"), salt, 4096, 32, sha1.New)
//
// Remember to get a good random salt. At least 8 bytes is recommended by the
// RFC.
//
// Using a higher iteration count will increase the cost of an exhaustive
// search but will also make derivation proportionally slower.
// Copy from https://golang.org/x/crypto/pbkdf2
func PBKDF2Key(password, salt []byte, iter, keyLen int, h func() hash.Hash) []byte {
prf := hmac.New(h, password)
hashLen := prf.Size()
numBlocks := (keyLen + hashLen - 1) / hashLen
var buf [4]byte
dk := make([]byte, 0, numBlocks*hashLen)
u := make([]byte, hashLen)
for block := 1; block <= numBlocks; block++ {
// N.B.: || means concatenation, ^ means XOR
// for each block T_i = U_1 ^ U_2 ^ ... ^ U_iter
// U_1 = PRF(password, salt || uint(i))
prf.Reset()
prf.Write(salt)
buf[0] = byte(block >> 24)
buf[1] = byte(block >> 16)
buf[2] = byte(block >> 8)
buf[3] = byte(block)
prf.Write(buf[:4])
dk = prf.Sum(dk)
t := dk[len(dk)-hashLen:]
copy(u, t)
for n := 2; n <= iter; n++ {
prf.Reset()
prf.Write(u)
u = u[:0]
u = prf.Sum(u)
for x := range u {
t[x] ^= u[x]
}
}
}
return dk[:keyLen]
}