Merge pull request #25112 from hashicorp/alisdair/support-openssh-rsa-key-encoding
lang/funcs: Add support for OpenSSH RSA key format
This commit is contained in:
Alisdair McDiarmid
GitHub
commit
c921c8580e
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@ -6,12 +6,12 @@ import (
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"crypto/sha1"
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"crypto/sha256"
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"crypto/sha512"
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"crypto/x509"
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"encoding/asn1"
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"encoding/base64"
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"encoding/hex"
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"encoding/pem"
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"fmt"
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"hash"
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"strings"
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uuidv5 "github.com/google/uuid"
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uuid "github.com/hashicorp/go-uuid"
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@ -19,6 +19,7 @@ import (
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"github.com/zclconf/go-cty/cty/function"
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"github.com/zclconf/go-cty/cty/gocty"
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"golang.org/x/crypto/bcrypt"
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"golang.org/x/crypto/ssh"
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)
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var UUIDFunc = function.New(&function.Spec{
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@ -152,27 +153,30 @@ var RsaDecryptFunc = function.New(&function.Spec{
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b, err := base64.StdEncoding.DecodeString(s)
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if err != nil {
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return cty.UnknownVal(cty.String), fmt.Errorf("failed to decode input %q: cipher text must be base64-encoded", s)
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return cty.UnknownVal(cty.String), function.NewArgErrorf(0, "failed to decode input %q: cipher text must be base64-encoded", s)
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}
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block, _ := pem.Decode([]byte(key))
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if block == nil {
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return cty.UnknownVal(cty.String), fmt.Errorf("failed to parse key: no key found")
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}
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if block.Headers["Proc-Type"] == "4,ENCRYPTED" {
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return cty.UnknownVal(cty.String), fmt.Errorf(
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"failed to parse key: password protected keys are not supported. Please decrypt the key prior to use",
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)
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}
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x509Key, err := x509.ParsePKCS1PrivateKey(block.Bytes)
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rawKey, err := ssh.ParseRawPrivateKey([]byte(key))
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if err != nil {
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return cty.UnknownVal(cty.String), err
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var errStr string
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switch e := err.(type) {
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case asn1.SyntaxError:
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errStr = strings.ReplaceAll(e.Error(), "asn1: syntax error", "invalid ASN1 data in the given private key")
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case asn1.StructuralError:
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errStr = strings.ReplaceAll(e.Error(), "asn1: struture error", "invalid ASN1 data in the given private key")
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default:
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errStr = fmt.Sprintf("invalid private key: %s", e)
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}
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return cty.UnknownVal(cty.String), function.NewArgErrorf(1, errStr)
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}
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privateKey, ok := rawKey.(*rsa.PrivateKey)
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if !ok {
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return cty.UnknownVal(cty.String), function.NewArgErrorf(1, "invalid private key type %t", rawKey)
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}
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out, err := rsa.DecryptPKCS1v15(nil, x509Key, b)
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out, err := rsa.DecryptPKCS1v15(nil, privateKey, b)
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if err != nil {
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return cty.UnknownVal(cty.String), err
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return cty.UnknownVal(cty.String), fmt.Errorf("failed to decrypt: %s", err)
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}
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return cty.StringVal(string(out)), nil
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@ -370,58 +370,67 @@ func TestRsaDecrypt(t *testing.T) {
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Ciphertext cty.Value
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Privatekey cty.Value
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Want cty.Value
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Err bool
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Err string
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}{
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// Base-64 encoded cipher decrypts correctly
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{
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cty.StringVal(CipherBase64),
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cty.StringVal(PrivateKey),
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cty.StringVal("message"),
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false,
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"",
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},
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// OpenSSH key format
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{
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cty.StringVal(CipherBase64),
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cty.StringVal(OpenSSHPrivateKey),
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cty.StringVal("message"),
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"",
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},
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// Wrong key
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{
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cty.StringVal(CipherBase64),
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cty.StringVal(WrongPrivateKey),
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cty.UnknownVal(cty.String),
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true,
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"failed to decrypt: crypto/rsa: decryption error",
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},
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// Bad key
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{
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cty.StringVal(CipherBase64),
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cty.StringVal("bad key"),
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cty.StringVal(BadPrivateKey),
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cty.UnknownVal(cty.String),
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true,
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"invalid ASN1 data in the given private key: data truncated",
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},
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// Empty key
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{
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cty.StringVal(CipherBase64),
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cty.StringVal(""),
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cty.UnknownVal(cty.String),
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true,
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"invalid private key: ssh: no key found",
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},
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// Bad cipher
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// Bad ciphertext
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{
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cty.StringVal("bad cipher"),
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cty.StringVal("bad"),
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cty.StringVal(PrivateKey),
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cty.UnknownVal(cty.String),
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true,
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`failed to decode input "bad": cipher text must be base64-encoded`,
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},
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// Empty cipher
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// Empty ciphertext
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{
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cty.StringVal(""),
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cty.StringVal(PrivateKey),
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cty.UnknownVal(cty.String),
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true,
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"failed to decrypt: crypto/rsa: decryption error",
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},
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}
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for _, test := range tests {
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t.Run(fmt.Sprintf("RsaDecrypt(%#v, %#v)", test.Ciphertext, test.Privatekey), func(t *testing.T) {
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got, err := RsaDecrypt(test.Ciphertext, test.Privatekey)
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if test.Err {
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if test.Err != "" {
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if err == nil {
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t.Fatal("succeeded; want error")
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} else if err.Error() != test.Err {
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t.Fatalf("wrong error\ngot: %s\nwant: %s", err.Error(), test.Err)
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}
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return
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} else if err != nil {
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@ -699,6 +708,35 @@ OLlRAoGBAIZ5Uv4Z3s8O7WKXXUe/lq6j7vfiVkR1NW/Z/WLKXZpnmvJ7FgxN4e56
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RXT7GwNQHIY8eDjDnsHxzrxd+raOxOZeKcMHj3XyjCX3NHfTscnsBPAGYpY/Wxzh
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T8UYnFu6RzkixElTf2rseEav7rkdKkI3LAeIZy7B0HulKKsmqVQ7
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-----END RSA PRIVATE KEY-----
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`
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OpenSSHPrivateKey = `
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-----BEGIN OPENSSH PRIVATE KEY-----
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b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAABFwAAAAdzc2gtcn
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NhAAAAAwEAAQAAAQEAgUElV5mwqkloIrM8ZNZ72gSCcnSJt7+/Usa5G+D15YQUAdf9c1zE
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ekTfHgDP+04nw/uFNFaE5v1RbHaPxhZYVg5ZErNCa/hzn+x10xzcepeS3KPVXcxae4MR0B
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EegvqZqJzN9loXsNL/c3H/B+2Gle3hTxjlWFb3F5qLgR+4Mf4ruhER1v6eHQa/nchi03MB
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pT4UeJ7MrL92hTJYLdpSyCqmr8yjxkKJDVC2uRrr+sTSxfh7r6v24u/vp/QTmBIAlNPgad
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VAZw17iNNb7vjV7Gwl/5gHXonCUKURaV++dBNLrHIZpqcAM8wHRph8mD1EfL9hsz77pHew
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xolBATV+7QAAA7jbhEFk24RBZAAAAAdzc2gtcnNhAAABAQCBQSVXmbCqSWgiszxk1nvaBI
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JydIm3v79Sxrkb4PXlhBQB1/1zXMR6RN8eAM/7TifD+4U0VoTm/VFsdo/GFlhWDlkSs0Jr
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+HOf7HXTHNx6l5Lco9VdzFp7gxHQER6C+pmonM32Whew0v9zcf8H7YaV7eFPGOVYVvcXmo
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uBH7gx/iu6ERHW/p4dBr+dyGLTcwGlPhR4nsysv3aFMlgt2lLIKqavzKPGQokNULa5Guv6
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xNLF+Huvq/bi7++n9BOYEgCU0+Bp1UBnDXuI01vu+NXsbCX/mAdeicJQpRFpX750E0usch
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mmpwAzzAdGmHyYPUR8v2GzPvukd7DGiUEBNX7tAAAAAwEAAQAAAQAtayvpBVt76wGJt/vP
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30J0EMOZ3nOKOvnK54OiVUFy3h99ql0oTX/JCyxvyY9L2mHEzzw2cPSQipEzENJio/V0f+
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Qy2wTLFenjV17rySd8eIiluXg/VpCw+BSpTWqwUcju4/LHz06l1u7mrTcVnRR+2LEkbzYf
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/ackBy1gOTorbonTK2G3NxFMfAdRjzcifVvEPM5zWC38GDo1OFr9UixOqhkEB/UNFswNll
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H/I5JQmMjGEyMsAIxm/JGwCZSoZo9rdiII5qrcLdT2HKRpam7UAQ1Ill7eUuGF/9ZmiEP+
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PcnjVGo46WyYh9w24SWx8BU8z96WfT/Rhzs5RpGEfsEhAAAAgQCGeVL+Gd7PDu1il11Hv5
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auo+734lZEdTVv2f1iyl2aZ5ryexYMTeHuekV0+xsDUByGPHg4w57B8c68Xfq2jsTmXinD
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B4918owl9zR307HJ7ATwBmKWP1sc4U/FGJxbukc5IsRJU39q7HhGr+65HSpCNywHiGcuwd
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B7pSirJqlUOwAAAIEAw/Xida8kSv8n86V3qSY/I+fYQ5V+jDtXIE+JhRnS8xzbOzz3v0WS
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Oo5H+o4nJx5eL3Ghb3Gcm0Jn46dHrxinHbm+3RjXv/X6tlbxIYjRSQfHOTSMCTvdqcliF5
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vC6RCLXuc7R+IWR1Ky6eDEZGtrvt3DyeYABsp9fRUFR/6NluUAAACBAKjbMNWkpe1iWtux
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dA6CXZVPS1nq6V3Gs5SXCHTs/0vUA5kit0Q0E3an08UZq8YmCPSxLJpDpL85Z5zgTKZ2d2
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TlOaiEX6a3nESIt+ygwDh1hp5QtBFhoJeOmC2+/414ln9ABmPg3ySTXfYuk2yA1rvNueP3
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qwEumyjIVv96u39pAAAAAAEC
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-----END OPENSSH PRIVATE KEY-----
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`
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WrongPrivateKey = `
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-----BEGIN RSA PRIVATE KEY-----
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@ -728,5 +766,33 @@ CYhwNQKBgGPcLXmjpGtkZvggl0aZr9LsvCTckllSCFSI861kivL/rijdNoCHGxZv
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dfDkLTLcz9Gk41rD9Gxn/3sqodnTAc3Z2PxFnzg1Q/u3+x6YAgBwI/g/jE2xutGW
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H7CurtMwALQ/n/6LUKFmjRZjqbKX9SO2QSaC3grd6sY9Tu+bZjLe
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-----END RSA PRIVATE KEY-----
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`
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BadPrivateKey = `
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-----BEGIN RSA PRIVATE KEY-----
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MIIEowIBAAKCAQEAgUElV5mwqkloIrM8ZNZ72gSCcnSJt7+/Usa5G+D15YQUAdf9
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c1zEekTfHgDP+04nw/uFNFaE5v1RbHaPxhZYVg5ZErNCa/hzn+x10xzcepeS3KPV
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Xcxae4MR0BEegvqZqJzN9loXsNL/c3H/B+2Gle3hTxjlWFb3F5qLgR+4Mf4ruhER
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1v6eHQa/nchi03MBpT4UeJ7MrL92hTJYLdpSyCqmr8yjxkKJDVC2uRrr+sTSxfh7
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r6v24u/vp/QTmBIAlNPgadVAZw17iNNb7vjV7Gwl/5gHXonCUKURaV++dBNLrHIZ
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pqcAM8wHRph8mD1EfL9hsz77pHewxolBATV+7QIDAQABAoIBAC1rK+kFW3vrAYm3
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+8/fQnQQw5nec4o6+crng6JVQXLeH32qXShNf8kLLG/Jj0vaYcTPPDZw9JCKkTMQ
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0mKj9XR/5DLbBMsV6eNXXuvJJ3x4iKW5eD9WkLD4FKlNarBRyO7j8sfPTqXW7uat
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NxWdFH7YsSRvNh/9pyQHLWA5OituidMrYbc3EUx8B1GPNyJ9W8Q8znNYLfwYOjU4
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Wv1SLE6qGQQH9Q0WzA2WUf8jklCYyMYTIywAjGb8kbAJlKhmj2t2Igjmqtwt1PYc
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pGlqbtQBDUiWXt5S4YX/1maIQ/49yeNUajjpbJiH3DbhJbHwFTzP3pZ9P9GHOzlG
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kYR+wSECgYEAw/Xida8kSv8n86V3qSY/I+fYQ5V+jDtXIE+JhRnS8xzbOzz3v0WS
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Oo5H+o4nJx5eL3Ghb3Gcm0Jn46dHrxinHbm+3RjXv/X6tlbxIYjRSQfHOTSMCTvd
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qcliF5vC6RCLXuc7R+IWR1Ky6eDEZGtrvt3DyeYABsp9fRUFR/6NluUCgYEAqNsw
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1aSl7WJa27F0DoJdlU9LWerpXcazlJcIdOz/S9QDmSK3RDQTdqfTxRmrxiYI9LEs
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mkOkvzlnnOBMpnZ3ZOU5qIRfprecRIi37KDAOHWGnlC0EWGgl46YLb7/jXiWf0AG
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BhXoKvjI2HjYP21z/EyZ+PFPzur/lNaZhIUlMnUfibbwE9pFggQzzf8scM7c7Sf+
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mLoVSdoQ/Rujz7CqvQzi2nKSsM7t0curUIb3lJWee5/UeEaxZcmIufoNUrzohAWH
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BJOIPDM4ssUTLRq7wYM9uQKBgHCBau5OP8gE6mjKuXsZXWUoahpFLKwwwmJUp2vQ
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pOFPJ/6WZOlqkTVT6QPAcPUbTohKrF80hsZqZyDdSfT3peFx4ZLocBrS56m6NmHR
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UYHMvJ8rQm76T1fryHVidz85g3zRmfBeWg8yqT5oFg4LYgfLsPm1gRjOhs8LfPvI
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OLlRAoGBAIZ5Uv4Z3s8O7WKXXUe/lq6j7vfiVkR1NW/Z/WLKXZpnmvJ7FgxN4e56
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RXT7GwNQHIY8eDjDnsHxzrxd+raOxOZeKcMHj3XyjCX3NHfTscnsBPAGYpY/Wxzh
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T8UYnFu6RzkixElTf2rseEav7rkdKkI3LAeIZy7B0HulKKsmqVQ7
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-----END RSA PRIVATE KEY-----
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`
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)
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