Update gomod and vendor

vendor/github.com/moby/buildkit/session/auth/auth.go

@@ -0,0 +1,27 @@
+package auth
+
+import (
+	"context"
+
+	"github.com/moby/buildkit/session"
+	"github.com/pkg/errors"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+func CredentialsFunc(ctx context.Context, c session.Caller) func(string) (string, string, error) {
+	return func(host string) (string, string, error) {
+		client := NewAuthClient(c.Conn())
+
+		resp, err := client.Credentials(ctx, &CredentialsRequest{
+			Host: host,
+		})
+		if err != nil {
+			if st, ok := status.FromError(errors.Cause(err)); ok && st.Code() == codes.Unimplemented {
+				return "", "", nil
+			}
+			return "", "", errors.WithStack(err)
+		}
+		return resp.Username, resp.Secret, nil
+	}
+}

vendor/github.com/moby/buildkit/session/auth/auth.pb.go

@@ -0,0 +1,740 @@
+// Code generated by protoc-gen-gogo. DO NOT EDIT.
+// source: auth.proto
+
+package auth
+
+import (
+	context "context"
+	fmt "fmt"
+	proto "github.com/gogo/protobuf/proto"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+	io "io"
+	math "math"
+	math_bits "math/bits"
+	reflect "reflect"
+	strings "strings"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
+
+type CredentialsRequest struct {
+	Host string `protobuf:"bytes,1,opt,name=Host,proto3" json:"Host,omitempty"`
+}
+
+func (m *CredentialsRequest) Reset()      { *m = CredentialsRequest{} }
+func (*CredentialsRequest) ProtoMessage() {}
+func (*CredentialsRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_8bbd6f3875b0e874, []int{0}
+}
+func (m *CredentialsRequest) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *CredentialsRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_CredentialsRequest.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *CredentialsRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CredentialsRequest.Merge(m, src)
+}
+func (m *CredentialsRequest) XXX_Size() int {
+	return m.Size()
+}
+func (m *CredentialsRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_CredentialsRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CredentialsRequest proto.InternalMessageInfo
+
+func (m *CredentialsRequest) GetHost() string {
+	if m != nil {
+		return m.Host
+	}
+	return ""
+}
+
+type CredentialsResponse struct {
+	Username string `protobuf:"bytes,1,opt,name=Username,proto3" json:"Username,omitempty"`
+	Secret   string `protobuf:"bytes,2,opt,name=Secret,proto3" json:"Secret,omitempty"`
+}
+
+func (m *CredentialsResponse) Reset()      { *m = CredentialsResponse{} }
+func (*CredentialsResponse) ProtoMessage() {}
+func (*CredentialsResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_8bbd6f3875b0e874, []int{1}
+}
+func (m *CredentialsResponse) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *CredentialsResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_CredentialsResponse.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *CredentialsResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CredentialsResponse.Merge(m, src)
+}
+func (m *CredentialsResponse) XXX_Size() int {
+	return m.Size()
+}
+func (m *CredentialsResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_CredentialsResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CredentialsResponse proto.InternalMessageInfo
+
+func (m *CredentialsResponse) GetUsername() string {
+	if m != nil {
+		return m.Username
+	}
+	return ""
+}
+
+func (m *CredentialsResponse) GetSecret() string {
+	if m != nil {
+		return m.Secret
+	}
+	return ""
+}
+
+func init() {
+	proto.RegisterType((*CredentialsRequest)(nil), "moby.filesync.v1.CredentialsRequest")
+	proto.RegisterType((*CredentialsResponse)(nil), "moby.filesync.v1.CredentialsResponse")
+}
+
+func init() { proto.RegisterFile("auth.proto", fileDescriptor_8bbd6f3875b0e874) }
+
+var fileDescriptor_8bbd6f3875b0e874 = []byte{
+	// 233 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xe2, 0x4a, 0x2c, 0x2d, 0xc9,
+	0xd0, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0x12, 0xc8, 0xcd, 0x4f, 0xaa, 0xd4, 0x4b, 0xcb, 0xcc,
+	0x49, 0x2d, 0xae, 0xcc, 0x4b, 0xd6, 0x2b, 0x33, 0x54, 0xd2, 0xe0, 0x12, 0x72, 0x2e, 0x4a, 0x4d,
+	0x49, 0xcd, 0x2b, 0xc9, 0x4c, 0xcc, 0x29, 0x0e, 0x4a, 0x2d, 0x2c, 0x4d, 0x2d, 0x2e, 0x11, 0x12,
+	0xe2, 0x62, 0xf1, 0xc8, 0x2f, 0x2e, 0x91, 0x60, 0x54, 0x60, 0xd4, 0xe0, 0x0c, 0x02, 0xb3, 0x95,
+	0x3c, 0xb9, 0x84, 0x51, 0x54, 0x16, 0x17, 0xe4, 0xe7, 0x15, 0xa7, 0x0a, 0x49, 0x71, 0x71, 0x84,
+	0x16, 0xa7, 0x16, 0xe5, 0x25, 0xe6, 0xa6, 0x42, 0x95, 0xc3, 0xf9, 0x42, 0x62, 0x5c, 0x6c, 0xc1,
+	0xa9, 0xc9, 0x45, 0xa9, 0x25, 0x12, 0x4c, 0x60, 0x19, 0x28, 0xcf, 0x28, 0x89, 0x8b, 0xc5, 0xb1,
+	0xb4, 0x24, 0x43, 0x28, 0x8a, 0x8b, 0x1b, 0xc9, 0x48, 0x21, 0x15, 0x3d, 0x74, 0xe7, 0xe9, 0x61,
+	0xba, 0x4d, 0x4a, 0x95, 0x80, 0x2a, 0x88, 0xbb, 0x9c, 0xac, 0x2e, 0x3c, 0x94, 0x63, 0xb8, 0xf1,
+	0x50, 0x8e, 0xe1, 0xc3, 0x43, 0x39, 0xc6, 0x86, 0x47, 0x72, 0x8c, 0x2b, 0x1e, 0xc9, 0x31, 0x9e,
+	0x78, 0x24, 0xc7, 0x78, 0xe1, 0x91, 0x1c, 0xe3, 0x83, 0x47, 0x72, 0x8c, 0x2f, 0x1e, 0xc9, 0x31,
+	0x7c, 0x78, 0x24, 0xc7, 0x38, 0xe1, 0xb1, 0x1c, 0xc3, 0x85, 0xc7, 0x72, 0x0c, 0x37, 0x1e, 0xcb,
+	0x31, 0x44, 0xb1, 0x80, 0x02, 0x2b, 0x89, 0x0d, 0x1c, 0x5a, 0xc6, 0x80, 0x00, 0x00, 0x00, 0xff,
+	0xff, 0x64, 0x61, 0x71, 0x59, 0x3b, 0x01, 0x00, 0x00,
+}
+
+func (this *CredentialsRequest) Equal(that interface{}) bool {
+	if that == nil {
+		return this == nil
+	}
+
+	that1, ok := that.(*CredentialsRequest)
+	if !ok {
+		that2, ok := that.(CredentialsRequest)
+		if ok {
+			that1 = &that2
+		} else {
+			return false
+		}
+	}
+	if that1 == nil {
+		return this == nil
+	} else if this == nil {
+		return false
+	}
+	if this.Host != that1.Host {
+		return false
+	}
+	return true
+}
+func (this *CredentialsResponse) Equal(that interface{}) bool {
+	if that == nil {
+		return this == nil
+	}
+
+	that1, ok := that.(*CredentialsResponse)
+	if !ok {
+		that2, ok := that.(CredentialsResponse)
+		if ok {
+			that1 = &that2
+		} else {
+			return false
+		}
+	}
+	if that1 == nil {
+		return this == nil
+	} else if this == nil {
+		return false
+	}
+	if this.Username != that1.Username {
+		return false
+	}
+	if this.Secret != that1.Secret {
+		return false
+	}
+	return true
+}
+func (this *CredentialsRequest) GoString() string {
+	if this == nil {
+		return "nil"
+	}
+	s := make([]string, 0, 5)
+	s = append(s, "&auth.CredentialsRequest{")
+	s = append(s, "Host: "+fmt.Sprintf("%#v", this.Host)+",\n")
+	s = append(s, "}")
+	return strings.Join(s, "")
+}
+func (this *CredentialsResponse) GoString() string {
+	if this == nil {
+		return "nil"
+	}
+	s := make([]string, 0, 6)
+	s = append(s, "&auth.CredentialsResponse{")
+	s = append(s, "Username: "+fmt.Sprintf("%#v", this.Username)+",\n")
+	s = append(s, "Secret: "+fmt.Sprintf("%#v", this.Secret)+",\n")
+	s = append(s, "}")
+	return strings.Join(s, "")
+}
+func valueToGoStringAuth(v interface{}, typ string) string {
+	rv := reflect.ValueOf(v)
+	if rv.IsNil() {
+		return "nil"
+	}
+	pv := reflect.Indirect(rv).Interface()
+	return fmt.Sprintf("func(v %v) *%v { return &v } ( %#v )", typ, typ, pv)
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// AuthClient is the client API for Auth service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type AuthClient interface {
+	Credentials(ctx context.Context, in *CredentialsRequest, opts ...grpc.CallOption) (*CredentialsResponse, error)
+}
+
+type authClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewAuthClient(cc *grpc.ClientConn) AuthClient {
+	return &authClient{cc}
+}
+
+func (c *authClient) Credentials(ctx context.Context, in *CredentialsRequest, opts ...grpc.CallOption) (*CredentialsResponse, error) {
+	out := new(CredentialsResponse)
+	err := c.cc.Invoke(ctx, "/moby.filesync.v1.Auth/Credentials", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// AuthServer is the server API for Auth service.
+type AuthServer interface {
+	Credentials(context.Context, *CredentialsRequest) (*CredentialsResponse, error)
+}
+
+// UnimplementedAuthServer can be embedded to have forward compatible implementations.
+type UnimplementedAuthServer struct {
+}
+
+func (*UnimplementedAuthServer) Credentials(ctx context.Context, req *CredentialsRequest) (*CredentialsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Credentials not implemented")
+}
+
+func RegisterAuthServer(s *grpc.Server, srv AuthServer) {
+	s.RegisterService(&_Auth_serviceDesc, srv)
+}
+
+func _Auth_Credentials_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(CredentialsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(AuthServer).Credentials(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/moby.filesync.v1.Auth/Credentials",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(AuthServer).Credentials(ctx, req.(*CredentialsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _Auth_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "moby.filesync.v1.Auth",
+	HandlerType: (*AuthServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Credentials",
+			Handler:    _Auth_Credentials_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "auth.proto",
+}
+
+func (m *CredentialsRequest) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *CredentialsRequest) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *CredentialsRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if len(m.Host) > 0 {
+		i -= len(m.Host)
+		copy(dAtA[i:], m.Host)
+		i = encodeVarintAuth(dAtA, i, uint64(len(m.Host)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
+func (m *CredentialsResponse) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *CredentialsResponse) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *CredentialsResponse) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if len(m.Secret) > 0 {
+		i -= len(m.Secret)
+		copy(dAtA[i:], m.Secret)
+		i = encodeVarintAuth(dAtA, i, uint64(len(m.Secret)))
+		i--
+		dAtA[i] = 0x12
+	}
+	if len(m.Username) > 0 {
+		i -= len(m.Username)
+		copy(dAtA[i:], m.Username)
+		i = encodeVarintAuth(dAtA, i, uint64(len(m.Username)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
+func encodeVarintAuth(dAtA []byte, offset int, v uint64) int {
+	offset -= sovAuth(v)
+	base := offset
+	for v >= 1<<7 {
+		dAtA[offset] = uint8(v&0x7f | 0x80)
+		v >>= 7
+		offset++
+	}
+	dAtA[offset] = uint8(v)
+	return base
+}
+func (m *CredentialsRequest) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = len(m.Host)
+	if l > 0 {
+		n += 1 + l + sovAuth(uint64(l))
+	}
+	return n
+}
+
+func (m *CredentialsResponse) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = len(m.Username)
+	if l > 0 {
+		n += 1 + l + sovAuth(uint64(l))
+	}
+	l = len(m.Secret)
+	if l > 0 {
+		n += 1 + l + sovAuth(uint64(l))
+	}
+	return n
+}
+
+func sovAuth(x uint64) (n int) {
+	return (math_bits.Len64(x|1) + 6) / 7
+}
+func sozAuth(x uint64) (n int) {
+	return sovAuth(uint64((x << 1) ^ uint64((int64(x) >> 63))))
+}
+func (this *CredentialsRequest) String() string {
+	if this == nil {
+		return "nil"
+	}
+	s := strings.Join([]string{`&CredentialsRequest{`,
+		`Host:` + fmt.Sprintf("%v", this.Host) + `,`,
+		`}`,
+	}, "")
+	return s
+}
+func (this *CredentialsResponse) String() string {
+	if this == nil {
+		return "nil"
+	}
+	s := strings.Join([]string{`&CredentialsResponse{`,
+		`Username:` + fmt.Sprintf("%v", this.Username) + `,`,
+		`Secret:` + fmt.Sprintf("%v", this.Secret) + `,`,
+		`}`,
+	}, "")
+	return s
+}
+func valueToStringAuth(v interface{}) string {
+	rv := reflect.ValueOf(v)
+	if rv.IsNil() {
+		return "nil"
+	}
+	pv := reflect.Indirect(rv).Interface()
+	return fmt.Sprintf("*%v", pv)
+}
+func (m *CredentialsRequest) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowAuth
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: CredentialsRequest: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: CredentialsRequest: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Host", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowAuth
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthAuth
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthAuth
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Host = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipAuth(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthAuth
+			}
+			if (iNdEx + skippy) < 0 {
+				return ErrInvalidLengthAuth
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *CredentialsResponse) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowAuth
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: CredentialsResponse: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: CredentialsResponse: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Username", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowAuth
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthAuth
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthAuth
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Username = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Secret", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowAuth
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthAuth
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthAuth
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Secret = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipAuth(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthAuth
+			}
+			if (iNdEx + skippy) < 0 {
+				return ErrInvalidLengthAuth
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func skipAuth(dAtA []byte) (n int, err error) {
+	l := len(dAtA)
+	iNdEx := 0
+	depth := 0
+	for iNdEx < l {
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return 0, ErrIntOverflowAuth
+			}
+			if iNdEx >= l {
+				return 0, io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		wireType := int(wire & 0x7)
+		switch wireType {
+		case 0:
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowAuth
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				iNdEx++
+				if dAtA[iNdEx-1] < 0x80 {
+					break
+				}
+			}
+		case 1:
+			iNdEx += 8
+		case 2:
+			var length int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowAuth
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				length |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if length < 0 {
+				return 0, ErrInvalidLengthAuth
+			}
+			iNdEx += length
+		case 3:
+			depth++
+		case 4:
+			if depth == 0 {
+				return 0, ErrUnexpectedEndOfGroupAuth
+			}
+			depth--
+		case 5:
+			iNdEx += 4
+		default:
+			return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
+		}
+		if iNdEx < 0 {
+			return 0, ErrInvalidLengthAuth
+		}
+		if depth == 0 {
+			return iNdEx, nil
+		}
+	}
+	return 0, io.ErrUnexpectedEOF
+}
+
+var (
+	ErrInvalidLengthAuth        = fmt.Errorf("proto: negative length found during unmarshaling")
+	ErrIntOverflowAuth          = fmt.Errorf("proto: integer overflow")
+	ErrUnexpectedEndOfGroupAuth = fmt.Errorf("proto: unexpected end of group")
+)

vendor/github.com/moby/buildkit/session/auth/auth.proto

@@ -0,0 +1,19 @@
+syntax = "proto3";
+
+package moby.filesync.v1;
+
+option go_package = "auth";
+
+service Auth{
+  rpc Credentials(CredentialsRequest) returns (CredentialsResponse);
+}
+
+
+message CredentialsRequest {
+	string Host = 1;
+}
+
+message CredentialsResponse {
+	string Username = 1;
+	string Secret = 2;
+}

vendor/github.com/moby/buildkit/session/auth/authprovider/authprovider.go

@@ -0,0 +1,53 @@
+package authprovider
+
+import (
+	"context"
+	"io"
+	"sync"
+
+	"github.com/docker/cli/cli/config"
+	"github.com/docker/cli/cli/config/configfile"
+	"github.com/moby/buildkit/session"
+	"github.com/moby/buildkit/session/auth"
+	"google.golang.org/grpc"
+)
+
+func NewDockerAuthProvider(stderr io.Writer) session.Attachable {
+	return &authProvider{
+		config: config.LoadDefaultConfigFile(stderr),
+	}
+}
+
+type authProvider struct {
+	config *configfile.ConfigFile
+
+	// The need for this mutex is not well understood.
+	// Without it, the docker cli on OS X hangs when
+	// reading credentials from docker-credential-osxkeychain.
+	// See issue https://github.com/docker/cli/issues/1862
+	mu sync.Mutex
+}
+
+func (ap *authProvider) Register(server *grpc.Server) {
+	auth.RegisterAuthServer(server, ap)
+}
+
+func (ap *authProvider) Credentials(ctx context.Context, req *auth.CredentialsRequest) (*auth.CredentialsResponse, error) {
+	ap.mu.Lock()
+	defer ap.mu.Unlock()
+	if req.Host == "registry-1.docker.io" {
+		req.Host = "https://index.docker.io/v1/"
+	}
+	ac, err := ap.config.GetAuthConfig(req.Host)
+	if err != nil {
+		return nil, err
+	}
+	res := &auth.CredentialsResponse{}
+	if ac.IdentityToken != "" {
+		res.Secret = ac.IdentityToken
+	} else {
+		res.Username = ac.Username
+		res.Secret = ac.Password
+	}
+	return res, nil
+}

vendor/github.com/moby/buildkit/session/auth/generate.go

@@ -0,0 +1,3 @@
+package auth
+
+//go:generate protoc --gogoslick_out=plugins=grpc:. auth.proto