diff --git a/go.mod b/go.mod index 07c4408b0..c5e8d5570 100644 --- a/go.mod +++ b/go.mod @@ -17,12 +17,13 @@ require ( github.com/jessevdk/go-flags v1.5.0 github.com/kevinburke/ssh_config v0.0.0-20201106050909-4977a11b4351 github.com/sergi/go-diff v1.1.0 + github.com/skeema/knownhosts v1.1.0 github.com/whilp/git-urls v1.0.0 github.com/xanzy/ssh-agent v0.3.1 - golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97 - golang.org/x/net v0.0.0-20210326060303-6b1517762897 + golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e + golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c - golang.org/x/text v0.3.3 + golang.org/x/text v0.3.6 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c gopkg.in/warnings.v0 v0.1.2 // indirect ) diff --git a/go.sum b/go.sum index f3949afef..977ec3b08 100644 --- a/go.sum +++ b/go.sum @@ -51,6 +51,8 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN github.com/sergi/go-diff v1.1.0 h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0= github.com/sergi/go-diff v1.1.0/go.mod h1:STckp+ISIX8hZLjrqAeVduY0gWCT9IjLuqbuNXdaHfM= github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0= +github.com/skeema/knownhosts v1.1.0 h1:Wvr9V0MxhjRbl3f9nMnKnFfiWTJmtECJ9Njkea3ysW0= +github.com/skeema/knownhosts v1.1.0/go.mod h1:sKFq3RD6/TKZkSWn8boUbDC7Qkgcv+8XXijpFO6roag= github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs= github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4= @@ -61,24 +63,26 @@ github.com/whilp/git-urls v1.0.0/go.mod h1:J16SAmobsqc3Qcy98brfl5f5+e0clUvg1krgw github.com/xanzy/ssh-agent v0.3.1 h1:AmzO1SSWxw73zxFZPRwaMN1MohDw8UyHnmuxyceTEGo= github.com/xanzy/ssh-agent v0.3.1/go.mod h1:QIE4lCeL7nkC25x+yA3LBIYfwCc1TFziCtG7cBAac6w= golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4= -golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97 h1:/UOmuWzQfxxo9UtlXMwuQU8CMgg1eZXqTRwkSQJWKOI= golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc= +golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e h1:T8NU3HyQ8ClP4SEE+KbFlg6n0NhuTsN4MyznaarGsZM= +golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4= golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg= -golang.org/x/net v0.0.0-20210326060303-6b1517762897 h1:KrsHThm5nFk34YtATK1LsThyGhGbGe1olrte/HInHvs= -golang.org/x/net v0.0.0-20210326060303-6b1517762897/go.mod h1:uSPa2vr4CLtc/ILN5odXGNXS6mhrKVzTaCXzk9m6W3k= +golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2 h1:CIJ76btIcR3eFI5EgSo6k1qKw9KJexJuRLI9G7Hp5wE= +golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y= golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20210320140829-1e4c9ba3b0c4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= -golang.org/x/sys v0.0.0-20210324051608-47abb6519492/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c h1:F1jZWGFhYfh0Ci55sIpILtKKK8p3i2/krTr0H1rg74I= golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 h1:v+OssWQX+hTHEmOBgwxdZxK4zHq3yOs8F9J7mk0PY8E= golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo= -golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k= golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= +golang.org/x/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M= +golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= diff --git a/plumbing/transport/ssh/auth_method.go b/plumbing/transport/ssh/auth_method.go index b4959d6d6..9d3bcd359 100644 --- a/plumbing/transport/ssh/auth_method.go +++ b/plumbing/transport/ssh/auth_method.go @@ -10,9 +10,9 @@ import ( "github.com/go-git/go-git/v5/plumbing/transport" + "github.com/skeema/knownhosts" sshagent "github.com/xanzy/ssh-agent" "golang.org/x/crypto/ssh" - "golang.org/x/crypto/ssh/knownhosts" ) const DefaultUsername = "git" @@ -43,7 +43,6 @@ const ( type KeyboardInteractive struct { User string Challenge ssh.KeyboardInteractiveChallenge - HostKeyCallbackHelper } func (a *KeyboardInteractive) Name() string { @@ -55,19 +54,18 @@ func (a *KeyboardInteractive) String() string { } func (a *KeyboardInteractive) ClientConfig() (*ssh.ClientConfig, error) { - return a.SetHostKeyCallback(&ssh.ClientConfig{ + return &ssh.ClientConfig{ User: a.User, Auth: []ssh.AuthMethod{ a.Challenge, }, - }) + }, nil } // Password implements AuthMethod by using the given password. type Password struct { User string Password string - HostKeyCallbackHelper } func (a *Password) Name() string { @@ -79,10 +77,10 @@ func (a *Password) String() string { } func (a *Password) ClientConfig() (*ssh.ClientConfig, error) { - return a.SetHostKeyCallback(&ssh.ClientConfig{ + return &ssh.ClientConfig{ User: a.User, Auth: []ssh.AuthMethod{ssh.Password(a.Password)}, - }) + }, nil } // PasswordCallback implements AuthMethod by using a callback @@ -90,7 +88,6 @@ func (a *Password) ClientConfig() (*ssh.ClientConfig, error) { type PasswordCallback struct { User string Callback func() (pass string, err error) - HostKeyCallbackHelper } func (a *PasswordCallback) Name() string { @@ -102,17 +99,16 @@ func (a *PasswordCallback) String() string { } func (a *PasswordCallback) ClientConfig() (*ssh.ClientConfig, error) { - return a.SetHostKeyCallback(&ssh.ClientConfig{ + return &ssh.ClientConfig{ User: a.User, Auth: []ssh.AuthMethod{ssh.PasswordCallback(a.Callback)}, - }) + }, nil } // PublicKeys implements AuthMethod by using the given key pairs. type PublicKeys struct { User string Signer ssh.Signer - HostKeyCallbackHelper } // NewPublicKeys returns a PublicKeys from a PEM encoded private key. An @@ -151,10 +147,10 @@ func (a *PublicKeys) String() string { } func (a *PublicKeys) ClientConfig() (*ssh.ClientConfig, error) { - return a.SetHostKeyCallback(&ssh.ClientConfig{ + return &ssh.ClientConfig{ User: a.User, Auth: []ssh.AuthMethod{ssh.PublicKeys(a.Signer)}, - }) + }, nil } func username() (string, error) { @@ -177,7 +173,6 @@ func username() (string, error) { type PublicKeysCallback struct { User string Callback func() (signers []ssh.Signer, err error) - HostKeyCallbackHelper } // NewSSHAgentAuth returns a PublicKeysCallback based on a SSH agent, it opens @@ -212,10 +207,10 @@ func (a *PublicKeysCallback) String() string { } func (a *PublicKeysCallback) ClientConfig() (*ssh.ClientConfig, error) { - return a.SetHostKeyCallback(&ssh.ClientConfig{ + return &ssh.ClientConfig{ User: a.User, Auth: []ssh.AuthMethod{ssh.PublicKeysCallback(a.Callback)}, - }) + }, nil } // NewKnownHostsCallback returns ssh.HostKeyCallback based on a file based on a @@ -231,6 +226,11 @@ func (a *PublicKeysCallback) ClientConfig() (*ssh.ClientConfig, error) { // ~/.ssh/known_hosts // /etc/ssh/ssh_known_hosts func NewKnownHostsCallback(files ...string) (ssh.HostKeyCallback, error) { + kh, err := newKnownHosts(files...) + return ssh.HostKeyCallback(kh), err +} + +func newKnownHosts(files ...string) (knownhosts.HostKeyCallback, error) { var err error if len(files) == 0 { @@ -286,6 +286,9 @@ func filterKnownHostsFiles(files ...string) ([]string, error) { // HostKeyCallbackHelper is a helper that provides common functionality to // configure HostKeyCallback into a ssh.ClientConfig. +// Deprecated in favor of SetConfigHostKeyFields (see common.go) which provides +// a mechanism for also setting ClientConfig.HostKeyAlgorithms for a specific +// host. type HostKeyCallbackHelper struct { // HostKeyCallback is the function type used for verifying server keys. // If nil default callback will be create using NewKnownHostsCallback diff --git a/plumbing/transport/ssh/common.go b/plumbing/transport/ssh/common.go index 46e79134c..4b9ac0797 100644 --- a/plumbing/transport/ssh/common.go +++ b/plumbing/transport/ssh/common.go @@ -121,10 +121,15 @@ func (c *command) connect() error { if err != nil { return err } + hostWithPort := c.getHostWithPort() + config, err = SetConfigHostKeyFields(config, hostWithPort) + if err != nil { + return err + } overrideConfig(c.config, config) - c.client, err = dial("tcp", c.getHostWithPort(), config) + c.client, err = dial("tcp", hostWithPort, config) if err != nil { return err } @@ -162,6 +167,23 @@ func dial(network, addr string, config *ssh.ClientConfig) (*ssh.Client, error) { return ssh.NewClient(c, chans, reqs), nil } +// SetConfigHostKeyFields sets cfg.HostKeyCallback and cfg.HostKeyAlgorithms +// based on OpenSSH known_hosts. cfg is modified in-place. hostWithPort must be +// supplied, since the algorithms will be set based on the known host keys for +// that specific host. Otherwise, golang.org/x/crypto/ssh can return an error +// upon connecting to a host whose *first* key is not known, even though other +// keys (of different types) are known and match properly. +// For background see https://github.com/go-git/go-git/issues/411 as well as +// https://github.com/golang/go/issues/29286 for root cause. +func SetConfigHostKeyFields(cfg *ssh.ClientConfig, hostWithPort string) (*ssh.ClientConfig, error) { + kh, err := newKnownHosts() + if err == nil { + cfg.HostKeyCallback = kh.HostKeyCallback() + cfg.HostKeyAlgorithms = kh.HostKeyAlgorithms(hostWithPort) + } + return cfg, err +} + func (c *command) getHostWithPort() string { if addr, found := c.doGetHostWithPortFromSSHConfig(); found { return addr