diff --git a/CHANGELOG.md b/CHANGELOG.md index 510dabd..e72941a 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,6 +1,10 @@ # cap CHANGELOG Canonical reference for changes, improvements, and bugfixes for cap. +## 0.3.3 +### Bug fixes: +* LDAP + * A more compete fix for `escapeValue(...)` and we've stopped exporting it ([**PR**](https://github.com/hashicorp/cap/pull/78)) ## 0.3.2 ### Bug fixes: diff --git a/ldap/client.go b/ldap/client.go index 5a6cfb4..6b76aaf 100644 --- a/ldap/client.go +++ b/ldap/client.go @@ -9,6 +9,7 @@ import ( "crypto/tls" "crypto/x509" "encoding/binary" + "encoding/hex" "fmt" "math" "net" @@ -644,9 +645,9 @@ func (c *Client) getUserBindDN(username string) (string, error) { bindDN = result.Entries[0].DN } else { if c.conf.UPNDomain != "" { - bindDN = fmt.Sprintf("%s@%s", EscapeValue(username), c.conf.UPNDomain) + bindDN = fmt.Sprintf("%s@%s", escapeValue(username), c.conf.UPNDomain) } else { - bindDN = fmt.Sprintf("%s=%s,%s", c.conf.UserAttr, EscapeValue(username), c.conf.UserDN) + bindDN = fmt.Sprintf("%s=%s,%s", c.conf.UserAttr, escapeValue(username), c.conf.UserDN) } } return bindDN, nil @@ -666,7 +667,7 @@ func (c *Client) getUserDN(bindDN, username string) (string, error) { var userDN string if c.conf.UPNDomain != "" { // Find the distinguished name for the user if userPrincipalName used for login - filter := fmt.Sprintf("(userPrincipalName=%s@%s)", EscapeValue(username), c.conf.UPNDomain) + filter := fmt.Sprintf("(userPrincipalName=%s@%s)", escapeValue(username), c.conf.UPNDomain) result, err := c.conn.Search(&ldap.SearchRequest{ BaseDN: c.conf.UserDN, Scope: ldap.ScopeWholeSubtree, @@ -819,50 +820,61 @@ func getTLSConfig(host string, opt ...Option) (*tls.Config, error) { return tlsConfig, nil } -// EscapeValue will properly escape the input string as an ldap value -func EscapeValue(input string) string { +// escapeValue will properly escape the input string as an ldap value +// rfc4514 states the following must be escaped: +// - leading space or hash +// - trailing space +// - special characters '"', '+', ',', ';', '<', '>', '\\' +// - hex +func escapeValue(input string) string { + const op = "ldap.EscapeValue" if input == "" { return "" } - // RFC4514 forbids un-escaped: - // - leading space or hash - // - trailing space - // - special characters '"', '+', ',', ';', '<', '>', '\\' - // - null + buf := bytes.Buffer{} + + escFn := func(c byte) { + buf.WriteByte('\\') + buf.WriteByte(c) + } + inputLen := len(input) for i := 0; i < inputLen; i++ { - escaped := false - if input[i] == '\\' { - i++ - if i > inputLen-1 { - break - } - escaped = true - } - switch input[i] { - case '"', '+', ',', ';', '<', '>', '\\': - if !escaped { - input = input[0:i] + "\\" + input[i:] - i++ - } + char := input[i] + switch { + case i == 0 && char == ' ' || char == '#': + // leading space or hash. + escFn(char) continue - case '\000': - input = input[0:i] + `\00` + input[i+1:] + case i == inputLen-1 && char == ' ': + // trailing space. + escFn(char) continue - } - if escaped { - input = input[0:i] + "\\" + input[i:] - i++ + case specialChar(char): + // special characters '"', '+', ',', ';', '<', '>', '\\' + escFn(char) + continue + case char < ' ' || char > '~': + // anything that's not between the ascii space and tilde must be hex + buf.WriteByte('\\') + buf.WriteString(hex.EncodeToString([]byte{char})) + continue + default: + // everything remaining, doesn't need to be escaped + buf.WriteByte(char) } } - if input[0] == ' ' || input[0] == '#' { - input = "\\" + input - } - if input[len(input)-1] == ' ' { - input = input[0:len(input)-1] + "\\ " + return buf.String() +} + +func specialChar(char byte) bool { + switch char { + case '"', '+', ',', ';', '<', '>', '\\': + return true + default: + return false } - return input } func EscapeFilter(filter string) string { diff --git a/ldap/conn_test.go b/ldap/conn_test.go index abaae1c..703e71f 100644 --- a/ldap/conn_test.go +++ b/ldap/conn_test.go @@ -3,24 +3,30 @@ package ldap -import "testing" +import ( + "testing" +) func Test_EscapeValue(t *testing.T) { testcases := map[string]string{ - "#test": "\\#test", - "test,hello": "test\\,hello", - "test,hel+lo": "test\\,hel\\+lo", - "test\\hello": "test\\\\hello", - " test ": "\\ test \\ ", - "": "", - `\`: `\`, - "golang\000": `golang\00`, - "go\000lang": `go\00lang`, - "\000": `\00`, + "#test": "\\#test", + "test,hello": "test\\,hello", + "test,hel+lo": "test\\,hel\\+lo", + "test\\hello": "test\\\\hello", + " test ": "\\ test \\ ", + "": "", + `\`: `\\`, + "trailing\000": `trailing\00`, + "mid\000dle": `mid\00dle`, + "\000": `\00`, + "multiple\000\000": `multiple\00\00`, + "backlash-before-null\\\000": `backlash-before-null\\\00`, + "trailing\\": `trailing\\`, + "double-escaping\\>": `double-escaping\\\>`, } for test, answer := range testcases { - res := EscapeValue(test) + res := escapeValue(test) if res != answer { t.Errorf("Failed to escape %q: %q != %q\n", test, res, answer) } diff --git a/ldap/go.mod b/ldap/go.mod index 83faa9a..310c7e1 100644 --- a/ldap/go.mod +++ b/ldap/go.mod @@ -3,7 +3,7 @@ module github.com/hashicorp/cap/ldap go 1.20 require ( - github.com/go-ldap/ldap/v3 v3.4.4 + github.com/go-ldap/ldap/v3 v3.4.5 github.com/hashicorp/go-hclog v1.4.0 github.com/hashicorp/go-multierror v1.1.1 github.com/hashicorp/go-secure-stdlib/strutil v0.1.2 @@ -26,7 +26,7 @@ require ( github.com/mitchellh/mapstructure v1.5.0 // indirect github.com/pmezard/go-difflib v1.0.0 // indirect github.com/ryanuber/go-glob v1.0.0 // indirect - golang.org/x/crypto v0.6.0 // indirect - golang.org/x/sys v0.5.0 // indirect + golang.org/x/crypto v0.11.0 // indirect + golang.org/x/sys v0.10.0 // indirect gopkg.in/yaml.v3 v3.0.1 // indirect ) diff --git a/ldap/go.sum b/ldap/go.sum index fddc85f..52d3bff 100644 --- a/ldap/go.sum +++ b/ldap/go.sum @@ -1,6 +1,7 @@ -github.com/Azure/go-ntlmssp v0.0.0-20220621081337-cb9428e4ac1e/go.mod h1:chxPXzSsl7ZWRAuOIE23GDNzjWuZquvFlgA8xmpunjU= 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 h1:Kk6a4nehpJ3UuJRqlA3JxYxBZEqCeOmATOvrbT4p9RA= +github.com/alexbrainman/sspi v0.0.0-20210105120005-909beea2cc74/go.mod h1:cEWa1LVoE5KvSD9ONXsZrj0z6KqySlCCNKHlLzbqAt4= github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8= github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs= github.com/cenkalti/backoff v2.2.1+incompatible h1:tNowT99t7UNflLxfYYSlKYsBpXdEet03Pg2g16Swow4= @@ -14,8 +15,8 @@ github.com/fatih/color v1.14.1 h1:qfhVLaG5s+nCROl1zJsZRxFeYrHLqWroPOQ8BWiNb4w= github.com/fatih/color v1.14.1/go.mod h1:2oHN61fhTpgcxD3TSWCgKDiH1+x4OiDVVGH8WlgGZGg= github.com/go-asn1-ber/asn1-ber v1.5.4 h1:vXT6d/FNDiELJnLb6hGNa309LMsrCoYFvpwHDF0+Y1A= github.com/go-asn1-ber/asn1-ber v1.5.4/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0= -github.com/go-ldap/ldap/v3 v3.4.4 h1:qPjipEpt+qDa6SI/h1fzuGWoRUY+qqQ9sOZq67/PYUs= -github.com/go-ldap/ldap/v3 v3.4.4/go.mod h1:fe1MsuN5eJJ1FeLT/LEBVdWfNWKh459R7aXgXtJC+aI= +github.com/go-ldap/ldap/v3 v3.4.5 h1:ekEKmaDrpvR2yf5Nc/DClsGG9lAmdDixe44mLzlW5r8= +github.com/go-ldap/ldap/v3 v3.4.5/go.mod h1:bMGIq3AGbytbaMwf8wdv5Phdxz0FWHTIYMSzyrYgnQs= github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4= github.com/hashicorp/errwrap v1.1.0 h1:OxrOeh75EUXMY8TBjag2fzXGZ40LB6IKw45YeGUDY2I= github.com/hashicorp/errwrap v1.1.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4= @@ -67,25 +68,52 @@ github.com/stretchr/testify v1.7.2/go.mod h1:R6va5+xMeoiuVRoj+gSkQ7d3FALtqAAGI1F github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU= github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk= github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4= -golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4= -golang.org/x/crypto v0.6.0 h1:qfktjS5LUO+fFKeJXZ+ikTRijMmljikvG68fpMMruSc= -golang.org/x/crypto v0.6.0/go.mod h1:OFC/31mSvZgRz0V1QTNCzfAI1aIRzbiufJtkMIlEp58= -golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y= +github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY= +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 v0.7.0/go.mod h1:pYwdfH91IfpZVANVyUOhSIPZaFoJGxTFbZhFTx+dXZU= +golang.org/x/crypto v0.11.0 h1:6Ewdq3tDic1mg5xRO4milcWCfMVQhI4NkqWWvqejpuA= 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