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add support for SCRAM-SHA-1

Browse source 
the idea is that clients may not support SCRAM-SHA-256, but may support
SCRAM-SHA-1. if they do support the 256 variant, they'll use it.

unfortunately, thunderbird does not support scram-sha-1 either.
This commit is contained in:
Mechiel Lukkien 2023-02-05 12:30:14 +01:00
parent 49dd5b7ba9
commit 642a328ae1
No known key found for this signature in database
7 changed files with 156 additions and 78 deletions
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13
imapclient/cmds.go
View file

@ -5,6 +5,7 @@ import (
"crypto/tls"
"encoding/base64"
"fmt"
"hash"
"strings"
"time"
@ -60,17 +61,17 @@ func (c *Conn) AuthenticatePlain(username, password string) (untagged []Untagged
return
}
// Authenticate with SCRAM-SHA-256, where the password is not exchanged in original
// plaintext form, but only derived hashes are exchanged by both parties as proof
// of knowledge of password.
func (c *Conn) AuthenticateSCRAMSHA256(username, password string) (untagged []Untagged, result Result, rerr error) {
// Authenticate with SCRAM-SHA-1 or SCRAM-SHA-256, where the password is not
// exchanged in original plaintext form, but only derived hashes are exchanged by
// both parties as proof of knowledge of password.
func (c *Conn) AuthenticateSCRAM(method string, h func() hash.Hash, username, password string) (untagged []Untagged, result Result, rerr error) {
defer c.recover(&rerr)
sc := scram.NewClient(username, "")
sc := scram.NewClient(h, username, "")
clientFirst, err := sc.ClientFirst()
c.xcheckf(err, "scram clientFirst")
c.LastTag = c.nextTag()
err = c.Writelinef("%s authenticate scram-sha-256 %s", c.LastTag, base64.StdEncoding.EncodeToString([]byte(clientFirst)))
err = c.Writelinef("%s authenticate %s %s", c.LastTag, method, base64.StdEncoding.EncodeToString([]byte(clientFirst)))
c.xcheckf(err, "writing command line")
xreadContinuation := func() []byte {

21
imapserver/authenticate_test.go
View file

@ -1,8 +1,11 @@
package imapserver
import (
"crypto/sha1"
"crypto/sha256"
"encoding/base64"
"errors"
"hash"
"strings"
"testing"
@ -53,19 +56,27 @@ func TestAuthenticatePlain(t *testing.T) {
tc.readstatus("ok")
}
func TestAuthenticateSCRAMSHA1(t *testing.T) {
testAuthenticateSCRAM(t, "SCRAM-SHA-1", sha1.New)
}
func TestAuthenticateSCRAMSHA256(t *testing.T) {
testAuthenticateSCRAM(t, "SCRAM-SHA-256", sha256.New)
}
func testAuthenticateSCRAM(t *testing.T, method string, h func() hash.Hash) {
tc := start(t)
tc.client.AuthenticateSCRAMSHA256("mjl@mox.example", "testtest")
tc.client.AuthenticateSCRAM(method, h, "mjl@mox.example", "testtest")
tc.close()
auth := func(status string, serverFinalError error, username, password string) {
t.Helper()
sc := scram.NewClient(username, "")
sc := scram.NewClient(h, username, "")
clientFirst, err := sc.ClientFirst()
tc.check(err, "scram clientFirst")
tc.client.LastTag = "x001"
tc.writelinef("%s authenticate scram-sha-256 %s", tc.client.LastTag, base64.StdEncoding.EncodeToString([]byte(clientFirst)))
tc.writelinef("%s authenticate %s %s", tc.client.LastTag, method, base64.StdEncoding.EncodeToString([]byte(clientFirst)))
xreadContinuation := func() []byte {
line, _, result, rerr := tc.client.ReadContinuation()
@ -109,7 +120,7 @@ func TestAuthenticateSCRAMSHA256(t *testing.T) {
// auth("no", nil, "other@mox.example", "testtest")
tc.transactf("no", "authenticate bogus ")
tc.transactf("bad", "authenticate scram-sha-256 not base64...")
tc.transactf("bad", "authenticate scram-sha-256 %s", base64.StdEncoding.EncodeToString([]byte("bad data")))
tc.transactf("bad", "authenticate %s not base64...", method)
tc.transactf("bad", "authenticate %s %s", method, base64.StdEncoding.EncodeToString([]byte("bad data")))
tc.close()
}

34
imapserver/server.go
View file

@ -39,10 +39,13 @@ import (
"bufio"
"bytes"
"context"
"crypto/sha1"
"crypto/sha256"
"crypto/tls"
"encoding/base64"
"errors"
"fmt"
"hash"
"io"
"net"
"os"
@ -114,8 +117,9 @@ var (
// LIST-STATUS: ../rfc/5819
// ID: ../rfc/2971
// AUTH=SCRAM-SHA-256: ../rfc/7677 ../rfc/5802
// AUTH=SCRAM-SHA-1: ../rfc/5802
// APPENDLIMIT, we support the max possible size, 1<<63 - 1: ../rfc/7889:129
const serverCapabilities = "IMAP4rev2 IMAP4rev1 ENABLE LITERAL+ IDLE SASL-IR BINARY UNSELECT UIDPLUS ESEARCH SEARCHRES MOVE UTF8=ONLY LIST-EXTENDED SPECIAL-USE LIST-STATUS AUTH=SCRAM-SHA-256 ID APPENDLIMIT=9223372036854775807"
const serverCapabilities = "IMAP4rev2 IMAP4rev1 ENABLE LITERAL+ IDLE SASL-IR BINARY UNSELECT UIDPLUS ESEARCH SEARCHRES MOVE UTF8=ONLY LIST-EXTENDED SPECIAL-USE LIST-STATUS AUTH=SCRAM-SHA-256 AUTH=SCRAM-SHA-1 ID APPENDLIMIT=9223372036854775807"
type conn struct {
cid int64
@ -1388,16 +1392,22 @@ func (c *conn) cmdAuthenticate(tag, cmd string, p *parser) {
c.username = authc
authResult = "ok"
case "SCRAM-SHA-256":
case "SCRAM-SHA-1", "SCRAM-SHA-256":
// todo: improve handling of errors during scram. e.g. invalid parameters. should we abort the imap command, or continue until the end and respond with a scram-level error?
// todo: use single implementation between ../imapserver/server.go and ../smtpserver/server.go
authVariant = "scram-sha-256"
authVariant = strings.ToLower(authType)
var h func() hash.Hash
if authVariant == "scram-sha-1" {
h = sha1.New
} else {
h = sha256.New
}
// No plaintext credentials, we can log these normally.
c0 := xreadInitial()
ss, err := scram.NewServer(c0)
ss, err := scram.NewServer(h, c0)
if err != nil {
xsyntaxErrorf("starting scram: %w", err)
}
@ -1418,12 +1428,16 @@ func (c *conn) cmdAuthenticate(tag, cmd string, p *parser) {
if ss.Authorization != "" && ss.Authorization != ss.Authentication {
xuserErrorf("authentication with authorization for different user not supported")
}
var password store.Password
var xscram store.SCRAM
acc.WithRLock(func() {
err := acc.DB.Read(func(tx *bstore.Tx) error {
password, err = bstore.QueryTx[store.Password](tx).Get()
xsc := password.SCRAMSHA256
if err == bstore.ErrAbsent || err == nil && (len(xsc.Salt) == 0 || xsc.Iterations == 0 || len(xsc.SaltedPassword) == 0) {
password, err := bstore.QueryTx[store.Password](tx).Get()
if authVariant == "scram-sha-1" {
xscram = password.SCRAMSHA1
} else {
xscram = password.SCRAMSHA256
}
if err == bstore.ErrAbsent || err == nil && (len(xscram.Salt) == 0 || xscram.Iterations == 0 || len(xscram.SaltedPassword) == 0) {
xuserErrorf("scram not possible")
}
xcheckf(err, "fetching credentials")
@ -1431,11 +1445,11 @@ func (c *conn) cmdAuthenticate(tag, cmd string, p *parser) {
})
xcheckf(err, "read tx")
})
s1, err := ss.ServerFirst(password.SCRAMSHA256.Iterations, password.SCRAMSHA256.Salt)
s1, err := ss.ServerFirst(xscram.Iterations, xscram.Salt)
xcheckf(err, "scram first server step")
c.writelinef("+ %s", base64.StdEncoding.EncodeToString([]byte(s1)))
c2 := xreadContinuation()
s3, err := ss.Finish(c2, password.SCRAMSHA256.SaltedPassword)
s3, err := ss.Finish(c2, xscram.SaltedPassword)
if len(s3) > 0 {
c.writelinef("+ %s", base64.StdEncoding.EncodeToString([]byte(s3)))
}

62
scram/scram.go
View file

@ -1,7 +1,7 @@
// Package scram implements the SCRAM-SHA256 SASL authentication mechanism, RFC 7677.
// Package scram implements the SCRAM-SHA-* SASL authentication mechanism, RFC 7677 and RFC 5802.
//
// SCRAM-SHA256 allows a client to authenticate to a server using a password
// without handing plaintext password over to the server. The client also
// SCRAM-SHA-256 and SCRAM-SHA-1 allow a client to authenticate to a server using a
// password without handing plaintext password over to the server. The client also
// verifies the server knows (a derivative of) the password.
package scram
@ -13,10 +13,10 @@ import (
"bytes"
"crypto/hmac"
cryptorand "crypto/rand"
"crypto/sha256"
"encoding/base64"
"errors"
"fmt"
"hash"
"strings"
"golang.org/x/crypto/pbkdf2"
@ -83,14 +83,14 @@ func MakeRandom() []byte {
}
// SaltPassword returns a salted password.
func SaltPassword(password string, salt []byte, iterations int) []byte {
func SaltPassword(h func() hash.Hash, password string, salt []byte, iterations int) []byte {
password = norm.NFC.String(password)
return pbkdf2.Key([]byte(password), salt, iterations, sha256.Size, sha256.New)
return pbkdf2.Key([]byte(password), salt, iterations, h().Size(), h)
}
// HMAC returns the hmac with key over msg.
func HMAC(key []byte, msg string) []byte {
mac := hmac.New(sha256.New, key)
func HMAC(h func() hash.Hash, key []byte, msg string) []byte {
mac := hmac.New(h, key)
mac.Write([]byte(msg))
return mac.Sum(nil)
}
@ -101,11 +101,13 @@ func xor(a, b []byte) {
}
}
// Server represents the server-side of a SCRAM-SHA-256 authentication.
// Server represents the server-side of a SCRAM-SHA-* authentication.
type Server struct {
Authentication string // Username for authentication, "authc". Always set and non-empty.
Authorization string // If set, role of user to assume after authentication, "authz".
h func() hash.Hash // sha1.New or sha256.New
// Messages used in hash calculations.
clientFirstBare string
serverFirst string
@ -123,11 +125,11 @@ type Server struct {
//
// - Read initial data from client, call NewServer (this call), then ServerFirst and write to the client.
// - Read response from client, call Finish or FinishFinal and write the resulting string.
func NewServer(clientFirst []byte) (server *Server, rerr error) {
func NewServer(h func() hash.Hash, clientFirst []byte) (server *Server, rerr error) {
p := newParser(clientFirst)
defer p.recover(&rerr)
server = &Server{}
server = &Server{h: h}
// ../rfc/5802:949 ../rfc/5802:910
gs2cbindFlag := p.xbyte()
@ -209,18 +211,19 @@ func (s *Server) Finish(clientFinal []byte, saltedPassword []byte) (serverFinal
msg := s.clientFirstBare + "," + s.serverFirst + "," + s.clientFinalWithoutProof
clientKey := HMAC(saltedPassword, "Client Key")
storedKey0 := sha256.Sum256(clientKey)
storedKey := storedKey0[:]
clientKey := HMAC(s.h, saltedPassword, "Client Key")
h := s.h()
h.Write(clientKey)
storedKey := h.Sum(nil)
clientSig := HMAC(storedKey, msg)
clientSig := HMAC(s.h, storedKey, msg)
xor(clientSig, clientKey) // Now clientProof.
if !bytes.Equal(clientSig, proof) {
return "e=" + string(ErrInvalidProof), ErrInvalidProof
}
serverKey := HMAC(saltedPassword, "Server Key")
serverSig := HMAC(serverKey, msg)
serverKey := HMAC(s.h, saltedPassword, "Server Key")
serverSig := HMAC(s.h, serverKey, msg)
return fmt.Sprintf("v=%s", base64.StdEncoding.EncodeToString(serverSig)), nil
}
@ -230,11 +233,13 @@ func (s *Server) FinishError(err Error) string {
return "e=" + string(err)
}
// Client represents the client-side of a SCRAM-SHA-256 authentication.
// Client represents the client-side of a SCRAM-SHA-* authentication.
type Client struct {
authc string
authz string
h func() hash.Hash // sha1.New or sha256.New
// Messages used in hash calculations.
clientFirstBare string
serverFirst string
@ -248,17 +253,17 @@ type Client struct {
}
// NewClient returns a client for authentication authc, optionally for
// authorization with role authz.
// authorization with role authz, for the hash (sha1.New or sha256.New).
//
// The sequence for data and calls on a client:
//
// - ClientFirst, write result to server.
// - Read response from server, feed to ServerFirst, write response to server.
// - Read response from server, feed to ServerFinal.
func NewClient(authc, authz string) *Client {
func NewClient(h func() hash.Hash, authc, authz string) *Client {
authc = norm.NFC.String(authc)
authz = norm.NFC.String(authz)
return &Client{authc: authc, authz: authz}
return &Client{authc: authc, authz: authz, h: h}
}
// ClientFirst returns the first client message to write to the server.
@ -315,11 +320,12 @@ func (c *Client) ServerFirst(serverFirst []byte, password string) (clientFinal s
c.authMessage = c.clientFirstBare + "," + c.serverFirst + "," + c.clientFinalWithoutProof
c.saltedPassword = SaltPassword(password, salt, iterations)
clientKey := HMAC(c.saltedPassword, "Client Key")
storedKey0 := sha256.Sum256(clientKey)
storedKey := storedKey0[:]
clientSig := HMAC(storedKey, c.authMessage)
c.saltedPassword = SaltPassword(c.h, password, salt, iterations)
clientKey := HMAC(c.h, c.saltedPassword, "Client Key")
h := c.h()
h.Write(clientKey)
storedKey := h.Sum(nil)
clientSig := HMAC(c.h, storedKey, c.authMessage)
xor(clientSig, clientKey) // Now clientProof.
clientProof := clientSig
@ -344,8 +350,8 @@ func (c *Client) ServerFinal(serverFinal []byte) (rerr error) {
p.xtake("v=")
verifier := p.xbase64()
serverKey := HMAC(c.saltedPassword, "Server Key")
serverSig := HMAC(serverKey, c.authMessage)
serverKey := HMAC(c.h, c.saltedPassword, "Server Key")
serverSig := HMAC(c.h, serverKey, c.authMessage)
if !bytes.Equal(verifier, serverSig) {
return fmt.Errorf("incorrect server signature")
}

48
scram/scram_test.go
View file

@ -1,6 +1,8 @@
package scram
import (
"crypto/sha1"
"crypto/sha256"
"encoding/base64"
"errors"
"testing"
@ -21,12 +23,32 @@ func tcheck(t *testing.T, err error, msg string) {
}
}
func TestScramServer(t *testing.T) {
func TestSCRAMSHA1Server(t *testing.T) {
// Test vector from ../rfc/5802:496
salt := base64Decode("QSXCR+Q6sek8bf92")
saltedPassword := SaltPassword(sha1.New, "pencil", salt, 4096)
server, err := NewServer(sha1.New, []byte("n,,n=user,r=fyko+d2lbbFgONRv9qkxdawL"))
server.serverNonceOverride = "3rfcNHYJY1ZVvWVs7j"
tcheck(t, err, "newserver")
resp, err := server.ServerFirst(4096, salt)
tcheck(t, err, "server first")
if resp != "r=fyko+d2lbbFgONRv9qkxdawL3rfcNHYJY1ZVvWVs7j,s=QSXCR+Q6sek8bf92,i=4096" {
t.Fatalf("bad server first")
}
serverFinal, err := server.Finish([]byte("c=biws,r=fyko+d2lbbFgONRv9qkxdawL3rfcNHYJY1ZVvWVs7j,p=v0X8v3Bz2T0CJGbJQyF0X+HI4Ts="), saltedPassword)
tcheck(t, err, "finish")
if serverFinal != "v=rmF9pqV8S7suAoZWja4dJRkFsKQ=" {
t.Fatalf("bad server final")
}
}
func TestSCRAMSHA256Server(t *testing.T) {
// Test vector from ../rfc/7677:122
salt := base64Decode("W22ZaJ0SNY7soEsUEjb6gQ==")
saltedPassword := SaltPassword("pencil", salt, 4096)
saltedPassword := SaltPassword(sha256.New, "pencil", salt, 4096)
server, err := NewServer([]byte("n,,n=user,r=rOprNGfwEbeRWgbNEkqO"))
server, err := NewServer(sha256.New, []byte("n,,n=user,r=rOprNGfwEbeRWgbNEkqO"))
server.serverNonceOverride = "%hvYDpWUa2RaTCAfuxFIlj)hNlF$k0"
tcheck(t, err, "newserver")
resp, err := server.ServerFirst(4096, salt)
@ -44,9 +66,9 @@ func TestScramServer(t *testing.T) {
// Bad attempt with wrong password.
func TestScramServerBadPassword(t *testing.T) {
salt := base64Decode("W22ZaJ0SNY7soEsUEjb6gQ==")
saltedPassword := SaltPassword("marker", salt, 4096)
saltedPassword := SaltPassword(sha256.New, "marker", salt, 4096)
server, err := NewServer([]byte("n,,n=user,r=rOprNGfwEbeRWgbNEkqO"))
server, err := NewServer(sha256.New, []byte("n,,n=user,r=rOprNGfwEbeRWgbNEkqO"))
server.serverNonceOverride = "%hvYDpWUa2RaTCAfuxFIlj)hNlF$k0"
tcheck(t, err, "newserver")
_, err = server.ServerFirst(4096, salt)
@ -60,9 +82,9 @@ func TestScramServerBadPassword(t *testing.T) {
// Bad attempt with different number of rounds.
func TestScramServerBadIterations(t *testing.T) {
salt := base64Decode("W22ZaJ0SNY7soEsUEjb6gQ==")
saltedPassword := SaltPassword("pencil", salt, 2048)
saltedPassword := SaltPassword(sha256.New, "pencil", salt, 2048)
server, err := NewServer([]byte("n,,n=user,r=rOprNGfwEbeRWgbNEkqO"))
server, err := NewServer(sha256.New, []byte("n,,n=user,r=rOprNGfwEbeRWgbNEkqO"))
server.serverNonceOverride = "%hvYDpWUa2RaTCAfuxFIlj)hNlF$k0"
tcheck(t, err, "newserver")
_, err = server.ServerFirst(4096, salt)
@ -76,9 +98,9 @@ func TestScramServerBadIterations(t *testing.T) {
// Another attempt but with a randomly different nonce.
func TestScramServerBad(t *testing.T) {
salt := base64Decode("W22ZaJ0SNY7soEsUEjb6gQ==")
saltedPassword := SaltPassword("pencil", salt, 4096)
saltedPassword := SaltPassword(sha256.New, "pencil", salt, 4096)
server, err := NewServer([]byte("n,,n=user,r=rOprNGfwEbeRWgbNEkqO"))
server, err := NewServer(sha256.New, []byte("n,,n=user,r=rOprNGfwEbeRWgbNEkqO"))
tcheck(t, err, "newserver")
_, err = server.ServerFirst(4096, salt)
tcheck(t, err, "server first")
@ -89,7 +111,7 @@ func TestScramServerBad(t *testing.T) {
}
func TestScramClient(t *testing.T) {
c := NewClient("user", "")
c := NewClient(sha256.New, "user", "")
c.clientNonce = "rOprNGfwEbeRWgbNEkqO"
clientFirst, err := c.ClientFirst()
tcheck(t, err, "ClientFirst")
@ -129,14 +151,14 @@ func TestScram(t *testing.T) {
}
salt := MakeRandom()
saltedPassword := SaltPassword(password, salt, iterations)
saltedPassword := SaltPassword(sha256.New, password, salt, iterations)
client := NewClient(username, "")
client := NewClient(sha256.New, username, "")
client.clientNonce = clientNonce
clientFirst, err := client.ClientFirst()
xerr(err, "client.ClientFirst")
server, err := NewServer([]byte(clientFirst))
server, err := NewServer(sha256.New, []byte(clientFirst))
xerr(err, "NewServer")
server.serverNonceOverride = serverNonce

33
smtpserver/server.go
View file

@ -6,10 +6,13 @@ import (
"bytes"
"context"
"crypto/rsa"
"crypto/sha1"
"crypto/sha256"
"crypto/tls"
"encoding/base64"
"errors"
"fmt"
"hash"
"io"
"net"
"os"
@ -679,7 +682,7 @@ func (c *conn) cmdHello(p *parser, ehlo bool) {
if c.submission {
// ../rfc/4954:123
if c.tls || !c.requireTLSForAuth {
c.bwritelinef("250-AUTH PLAIN SCRAM-SHA-256")
c.bwritelinef("250-AUTH PLAIN SCRAM-SHA-256 SCRAM-SHA-1")
} else {
c.bwritelinef("250-AUTH ")
}
@ -861,16 +864,22 @@ func (c *conn) cmdAuth(p *parser) {
// ../rfc/4954:276
c.writecodeline(smtp.C235AuthSuccess, smtp.SePol7Other0, "nice", nil)
case "SCRAM-SHA-256":
case "SCRAM-SHA-1", "SCRAM-SHA-256":
// todo: improve handling of errors during scram. e.g. invalid parameters. should we abort the imap command, or continue until the end and respond with a scram-level error?
// todo: use single implementation between ../imapserver/server.go and ../smtpserver/server.go
authVariant = "scram-sha-256"
authVariant = strings.ToLower(mech)
var h func() hash.Hash
if authVariant == "scram-sha-1" {
h = sha1.New
} else {
h = sha256.New
}
// Passwords cannot be retrieved or replayed from the trace.
c0 := xreadInitial()
ss, err := scram.NewServer(c0)
ss, err := scram.NewServer(h, c0)
xcheckf(err, "starting scram")
c.log.Info("scram auth", mlog.Field("authentication", ss.Authentication))
acc, _, err := store.OpenEmail(ss.Authentication)
@ -891,12 +900,16 @@ func (c *conn) cmdAuth(p *parser) {
if ss.Authorization != "" && ss.Authorization != ss.Authentication {
xsmtpUserErrorf(smtp.C535AuthBadCreds, smtp.SePol7AuthBadCreds8, "authentication with authorization for different user not supported")
}
var password store.Password
var xscram store.SCRAM
acc.WithRLock(func() {
err := acc.DB.Read(func(tx *bstore.Tx) error {
password, err = bstore.QueryTx[store.Password](tx).Get()
xsc := password.SCRAMSHA256
if err == bstore.ErrAbsent || err == nil && (len(xsc.Salt) == 0 || xsc.Iterations == 0 || len(xsc.SaltedPassword) == 0) {
password, err := bstore.QueryTx[store.Password](tx).Get()
if authVariant == "scram-sha-1" {
xscram = password.SCRAMSHA1
} else {
xscram = password.SCRAMSHA256
}
if err == bstore.ErrAbsent || err == nil && (len(xscram.Salt) == 0 || xscram.Iterations == 0 || len(xscram.SaltedPassword) == 0) {
xsmtpUserErrorf(smtp.C454TempAuthFail, smtp.SeSys3Other0, "scram not possible")
}
xcheckf(err, "fetching credentials")
@ -904,11 +917,11 @@ func (c *conn) cmdAuth(p *parser) {
})
xcheckf(err, "read tx")
})
s1, err := ss.ServerFirst(password.SCRAMSHA256.Iterations, password.SCRAMSHA256.Salt)
s1, err := ss.ServerFirst(xscram.Iterations, xscram.Salt)
xcheckf(err, "scram first server step")
c.writelinef("%d %s", smtp.C334ContinueAuth, base64.StdEncoding.EncodeToString([]byte(s1))) // ../rfc/4954:187
c2 := xreadContinuation()
s3, err := ss.Finish(c2, password.SCRAMSHA256.SaltedPassword)
s3, err := ss.Finish(c2, xscram.SaltedPassword)
if len(s3) > 0 {
c.writelinef("%d %s", smtp.C334ContinueAuth, base64.StdEncoding.EncodeToString([]byte(s3))) // ../rfc/4954:187
}

23
store/account.go
View file

@ -24,6 +24,8 @@ package store
import (
"context"
"crypto/sha1"
"crypto/sha256"
"encoding/json"
"errors"
"fmt"
@ -62,14 +64,17 @@ var subjectpassRand = mox.NewRand()
var InitialMailboxes = []string{"Inbox", "Sent", "Archive", "Trash", "Drafts", "Junk"}
type SCRAM struct {
Salt []byte
Iterations int
SaltedPassword []byte
}
// Password holds a bcrypt hash for logging in with SMTP/IMAP/admin.
type Password struct {
Hash string
SCRAMSHA256 struct {
Salt []byte
Iterations int
SaltedPassword []byte
}
SCRAMSHA1 SCRAM
SCRAMSHA256 SCRAM
}
// Subjectpass holds the secret key used to sign subjectpass tokens.
@ -609,9 +614,15 @@ func (a *Account) SetPassword(password string) error {
}
var pw Password
pw.Hash = string(hash)
pw.SCRAMSHA1.Salt = scram.MakeRandom()
pw.SCRAMSHA1.Iterations = 2 * 4096
pw.SCRAMSHA1.SaltedPassword = scram.SaltPassword(sha1.New, password, pw.SCRAMSHA1.Salt, pw.SCRAMSHA1.Iterations)
pw.SCRAMSHA256.Salt = scram.MakeRandom()
pw.SCRAMSHA256.Iterations = 4096
pw.SCRAMSHA256.SaltedPassword = scram.SaltPassword(password, pw.SCRAMSHA256.Salt, pw.SCRAMSHA256.Iterations)
pw.SCRAMSHA256.SaltedPassword = scram.SaltPassword(sha256.New, password, pw.SCRAMSHA256.Salt, pw.SCRAMSHA256.Iterations)
if err := tx.Insert(&pw); err != nil {
return fmt.Errorf("inserting new password: %v", err)
}