diff --git a/.github/dependabot.yml b/.github/dependabot.yml new file mode 100644 index 0000000..eea54dd --- /dev/null +++ b/.github/dependabot.yml @@ -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 \ No newline at end of file diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml index 249fb39..68e489f 100644 --- a/.github/workflows/build.yml +++ b/.github/workflows/build.yml @@ -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 diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml index 1a36459..76c208b 100644 --- a/.github/workflows/lint.yml +++ b/.github/workflows/lint.yml @@ -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 diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml index 62d6147..d1e17f4 100644 --- a/.github/workflows/release.yml +++ b/.github/workflows/release.yml @@ -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 diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml index a8790ce..828c4b0 100644 --- a/.github/workflows/unittest.yml +++ b/.github/workflows/unittest.yml @@ -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 diff --git a/.gitignore b/.gitignore index 92aa2ea..c6a2206 100644 --- a/.gitignore +++ b/.gitignore @@ -205,3 +205,4 @@ hack-browser-data # CICD Config !.typos.toml +!.github/*.yml \ No newline at end of file diff --git a/browser/chromium/chromium_darwin.go b/browser/chromium/chromium_darwin.go index b156f2b..5028d99 100644 --- a/browser/chromium/chromium_darwin.go +++ b/browser/chromium/chromium_darwin.go @@ -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 } diff --git a/browser/chromium/chromium_linux.go b/browser/chromium/chromium_linux.go index d9a8985..8f14cb2 100644 --- a/browser/chromium/chromium_linux.go +++ b/browser/chromium/chromium_linux.go @@ -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 diff --git a/crypto/asn1pbe.go b/crypto/asn1pbe.go index 397c81a..73c2a22 100644 --- a/crypto/asn1pbe.go +++ b/crypto/asn1pbe.go @@ -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 } diff --git a/go.mod b/go.mod index c77c977..6ba039d 100644 --- a/go.mod +++ b/go.mod @@ -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 ) diff --git a/go.sum b/go.sum index 8d75f8f..277f2e7 100644 --- a/go.sum +++ b/go.sum @@ -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 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v1.2.0 h1:agBi9dp1I+eOnxXeiZawM8F4LawKv4NzGWSaLfyeNZA= +modernc.org/strutil v1.2.0/go.mod h1:/mdcBmfOibveCTBxUl5B5l6W+TTH1FXPLHZE6bTosX0= +modernc.org/token v1.1.0 h1:Xl7Ap9dKaEs5kLoOQeQmPWevfnk/DM5qcLcYlA8ys6Y= +modernc.org/token v1.1.0/go.mod h1:UGzOrNV1mAFSEB63lOFHIpNRUVMvYTc6yu1SMY/XTDM= diff --git a/utils/cryptoutil/cryptoutil.go b/utils/cryptoutil/cryptoutil.go new file mode 100644 index 0000000..6838ecf --- /dev/null +++ b/utils/cryptoutil/cryptoutil.go @@ -0,0 +1,59 @@ +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] +}