First commit

.gitignore

@@ -0,0 +1,26 @@
+# If you prefer the allow list template instead of the deny list, see community template:
+# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
+#
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+go.work.sum
+
+# env file
+.env
+config.yaml

config.yaml.example

@@ -0,0 +1,4 @@
+ldapurl: "ldap://"
+basedn: ""
+binddn: ""
+bindpw: ""

go.mod

@@ -0,0 +1,13 @@
+module winch
+
+go 1.21.4
+
+require (
+	github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358 // indirect
+	github.com/go-asn1-ber/asn1-ber v1.5.5 // indirect
+	github.com/go-ldap/ldap/v3 v3.4.6 // indirect
+	github.com/go-yaml/yaml v2.1.0+incompatible // indirect
+	github.com/google/uuid v1.3.1 // indirect
+	github.com/jsimonetti/pwscheme v0.0.0-20220922140336-67a4d090f150 // indirect
+	golang.org/x/crypto v0.13.0 // indirect
+)

go.sum

@@ -0,0 +1,70 @@
+github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358 h1:mFRzDkZVAjdal+s7s0MwaRv9igoPqLRdzOLzw/8Xvq8=
+github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358/go.mod h1:chxPXzSsl7ZWRAuOIE23GDNzjWuZquvFlgA8xmpunjU=
+github.com/alexbrainman/sspi v0.0.0-20210105120005-909beea2cc74/go.mod h1:cEWa1LVoE5KvSD9ONXsZrj0z6KqySlCCNKHlLzbqAt4=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/go-asn1-ber/asn1-ber v1.5.5 h1:MNHlNMBDgEKD4TcKr36vQN68BA00aDfjIt3/bD50WnA=
+github.com/go-asn1-ber/asn1-ber v1.5.5/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0=
+github.com/go-ldap/ldap/v3 v3.4.6 h1:ert95MdbiG7aWo/oPYp9btL3KJlMPKnP58r09rI8T+A=
+github.com/go-ldap/ldap/v3 v3.4.6/go.mod h1:IGMQANNtxpsOzj7uUAMjpGBaOVTC4DYyIy8VsTdxmtc=
+github.com/go-yaml/yaml v2.1.0+incompatible h1:RYi2hDdss1u4YE7GwixGzWwVo47T8UQwnTLB6vQiq+o=
+github.com/go-yaml/yaml v2.1.0+incompatible/go.mod h1:w2MrLa16VYP0jy6N7M5kHaCkaLENm+P+Tv+MfurjSw0=
+github.com/google/uuid v1.3.1 h1:KjJaJ9iWZ3jOFZIf1Lqf4laDRCasjl0BCmnEGxkdLb4=
+github.com/google/uuid v1.3.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/jsimonetti/pwscheme v0.0.0-20220922140336-67a4d090f150 h1:ta6N7DaOQEACq28cLa0iRqXIbchByN9Lfll08CT2GBc=
+github.com/jsimonetti/pwscheme v0.0.0-20220922140336-67a4d090f150/go.mod h1:SiNTKDgjKQORnazFVHXhpny7UtU0iJOqtxd7R7sCfDI=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/crypto v0.0.0-20220919173607-35f4265a4bc0/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
+golang.org/x/crypto v0.13.0 h1:mvySKfSWJ+UKUii46M40LOvyWfN0s2U+46/jDd0e6Ck=
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+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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winch.go

@@ -0,0 +1,132 @@
+package main
+
+import (
+	"crypto/rand"
+	"crypto/sha512"
+	"encoding/base64"
+	"fmt"
+	"log"
+	randm "math/rand"
+	"os"
+	"strings"
+
+	"github.com/go-ldap/ldap/v3"
+	"github.com/go-yaml/yaml"
+)
+
+type conf struct {
+	LdapUrl string `yaml:"ldapurl"`
+	BaseDN  string `yaml:"basedn"`
+	BindDN  string `yaml:"binddn"`
+	BindPW  string `yaml:"bindpw"`
+}
+
+func (c *conf) get_config() *conf {
+	f, err := os.ReadFile("config.yaml")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	err = yaml.Unmarshal(f, c)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	return c
+}
+
+// Gettings uids of people that needs a password change
+func get_uids(ldap_conn *ldap.Conn, basedn string) []string {
+	uids := []string{}
+
+	search_req := ldap.NewSearchRequest(basedn, ldap.ScopeWholeSubtree, 0, 0, 0, false, "(uid=*)", []string{"uid", "userPassword"}, nil)
+	res, err := ldap_conn.Search(search_req)
+
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	for _, entry := range res.Entries {
+		uid := entry.GetAttributeValue("uid")
+		password := entry.GetAttributeValue("userPassword")
+		if strings.HasPrefix(password, "{SSHA}") {
+			uids = append(uids, uid)
+		}
+	}
+
+	return uids
+}
+
+func get_random_password(length int) string {
+	characters := []rune("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789")
+	var sb strings.Builder
+
+	for i := 0; i < length; i++ {
+		sb.WriteRune(characters[randm.Intn(len(characters))])
+	}
+
+	return sb.String()
+}
+
+func get_salt() ([]byte, error) {
+	salt := make([]byte, 4)
+	_, err := rand.Read(salt)
+	if err != nil {
+		return nil, err
+	}
+
+	return salt, nil
+}
+
+func get_hash(password string, salt []byte) []byte {
+	password_bytes := []byte(password)
+	password_salt := append(password_bytes, salt...)
+	sum := sha512.Sum512(password_salt)
+	res := append(sum[:], salt...)
+
+	return res
+}
+
+func change_password(ldap_conn *ldap.Conn, basedn string, uid string) {
+	password := get_random_password(20)
+
+	salt, err := get_salt()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	new_pass := "{SSHA512}" + base64.StdEncoding.EncodeToString(get_hash(password, salt))
+
+	modify_req := ldap.NewModifyRequest("uid="+uid+","+basedn, nil)
+	modify_req.Replace("userPassword", []string{new_pass})
+	err = ldap_conn.Modify(modify_req)
+
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Printf("%s : %s \n", uid, password)
+}
+
+func main() {
+	var c conf
+	c.get_config()
+
+	l, err := ldap.DialURL(c.LdapUrl)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer l.Close()
+
+	err = l.Bind(c.BindDN, c.BindPW)
+
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	uids := get_uids(l, c.BaseDN)
+
+	for _, uid := range uids {
+		change_password(l, c.BaseDN, uid)
+	}
+}