Initial commit for the keymanager plugin

go.mod

@@ -13,9 +13,9 @@ require (
 require github.com/stretchr/testify v1.10.0
 
 require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/stretchr/objx v0.5.2 // indirect
 	gopkg.in/yaml.v3 v3.0.1
 )
@@ -25,13 +25,30 @@ require github.com/zenazn/pkcs7pad v0.0.0-20170308005700-253a5b1f0e03
 require golang.org/x/text v0.23.0 // indirect
 
 require (
+	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
+	github.com/go-jose/go-jose/v4 v4.0.1 // indirect
+	github.com/google/go-cmp v0.6.0 // indirect
+	github.com/hashicorp/errwrap v1.1.0 // indirect
+	github.com/hashicorp/go-multierror v1.1.1 // indirect
+	github.com/hashicorp/go-rootcerts v1.0.2 // indirect
+	github.com/hashicorp/go-secure-stdlib/parseutil v0.1.6 // indirect
+	github.com/hashicorp/go-secure-stdlib/strutil v0.1.2 // indirect
+	github.com/hashicorp/go-sockaddr v1.0.2 // indirect
+	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mitchellh/go-homedir v1.1.0 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/ryanuber/go-glob v1.0.0 // indirect
+	golang.org/x/net v0.38.0 // indirect
 	golang.org/x/sys v0.31.0 // indirect
+	golang.org/x/time v0.0.0-20200416051211-89c76fbcd5d1 // indirect
 )
 
 require (
+	github.com/google/uuid v1.6.0
 	github.com/hashicorp/go-retryablehttp v0.7.7
+	github.com/hashicorp/vault/api v1.16.0
 	github.com/rs/zerolog v1.34.0
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1
 	gopkg.in/yaml.v2 v2.4.0

go.sum

@@ -1,18 +1,52 @@
+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/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8=
+github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
 github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
+github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dlclark/regexp2 v1.11.0 h1:G/nrcoOa7ZXlpoa/91N3X7mM3r8eIlMBBJZvsz/mxKI=
 github.com/dlclark/regexp2 v1.11.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
+github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/fatih/color v1.16.0 h1:zmkK9Ngbjj+K0yRhTVONQh1p/HknKYSlNT+vZCzyokM=
 github.com/fatih/color v1.16.0/go.mod h1:fL2Sau1YI5c0pdGEVCbKQbLXB6edEj1ZgiY4NijnWvE=
+github.com/go-jose/go-jose/v4 v4.0.1 h1:QVEPDE3OluqXBQZDcnNvQrInro2h0e4eqNbnZSWqS6U=
+github.com/go-jose/go-jose/v4 v4.0.1/go.mod h1:WVf9LFMHh/QVrmqrOfqun0C45tMe3RoiKJMPvgWwLfY=
+github.com/go-test/deep v1.0.2 h1:onZX1rnHT3Wv6cqNgYyFOOlgVKJrksuCMCRvJStbMYw=
+github.com/go-test/deep v1.0.2/go.mod h1:wGDj63lr65AM2AQyKZd/NYHGb0R+1RLqB8NKt3aSFNA=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+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=
 github.com/hashicorp/go-cleanhttp v0.5.2 h1:035FKYIWjmULyFRBKPs8TBQoi0x6d9G4xc9neXJWAZQ=
 github.com/hashicorp/go-cleanhttp v0.5.2/go.mod h1:kO/YDlP8L1346E6Sodw+PrpBSV4/SoxCXGY6BqNFT48=
 github.com/hashicorp/go-hclog v1.6.3 h1:Qr2kF+eVWjTiYmU7Y31tYlP1h0q/X3Nl3tPGdaB11/k=
 github.com/hashicorp/go-hclog v1.6.3/go.mod h1:W4Qnvbt70Wk/zYJryRzDRU/4r0kIg0PVHBcfoyhpF5M=
+github.com/hashicorp/go-multierror v1.0.0/go.mod h1:dHtQlpGsu+cZNNAkkCN/P3hoUDHhCYQXV3UM06sGGrk=
+github.com/hashicorp/go-multierror v1.1.1 h1:H5DkEtf6CXdFp0N0Em5UCwQpXMWke8IA0+lD48awMYo=
+github.com/hashicorp/go-multierror v1.1.1/go.mod h1:iw975J/qwKPdAO1clOe2L8331t/9/fmwbPZ6JB6eMoM=
 github.com/hashicorp/go-retryablehttp v0.7.7 h1:C8hUCYzor8PIfXHa4UrZkU4VvK8o9ISHxT2Q8+VepXU=
 github.com/hashicorp/go-retryablehttp v0.7.7/go.mod h1:pkQpWZeYWskR+D1tR2O5OcBFOxfA7DoAO6xtkuQnHTk=
+github.com/hashicorp/go-rootcerts v1.0.2 h1:jzhAVGtqPKbwpyCPELlgNWhE1znq+qwJtW5Oi2viEzc=
+github.com/hashicorp/go-rootcerts v1.0.2/go.mod h1:pqUvnprVnM5bf7AOirdbb01K4ccR319Vf4pU3K5EGc8=
+github.com/hashicorp/go-secure-stdlib/parseutil v0.1.6 h1:om4Al8Oy7kCm/B86rLCLah4Dt5Aa0Fr5rYBG60OzwHQ=
+github.com/hashicorp/go-secure-stdlib/parseutil v0.1.6/go.mod h1:QmrqtbKuxxSWTN3ETMPuB+VtEiBJ/A9XhoYGv8E1uD8=
+github.com/hashicorp/go-secure-stdlib/strutil v0.1.1/go.mod h1:gKOamz3EwoIoJq7mlMIRBpVTAUn8qPCrEclOKKWhD3U=
+github.com/hashicorp/go-secure-stdlib/strutil v0.1.2 h1:kes8mmyCpxJsI7FTwtzRqEy9CdjCtrXrXGuOpxEA7Ts=
+github.com/hashicorp/go-secure-stdlib/strutil v0.1.2/go.mod h1:Gou2R9+il93BqX25LAKCLuM+y9U2T4hlwvT1yprcna4=
+github.com/hashicorp/go-sockaddr v1.0.2 h1:ztczhD1jLxIRjVejw8gFomI1BQZOe2WoVOu0SyteCQc=
+github.com/hashicorp/go-sockaddr v1.0.2/go.mod h1:rB4wwRAUzs07qva3c5SdrY/NEtAUjGlgmH/UkBUC97A=
+github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
+github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
+github.com/hashicorp/vault/api v1.16.0 h1:nbEYGJiAPGzT9U4oWgaaB0g+Rj8E59QuHKyA5LhwQN4=
+github.com/hashicorp/vault/api v1.16.0/go.mod h1:KhuUhzOD8lDSk29AtzNjgAu2kxRA9jL9NAbkFlqvkBA=
 github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
@@ -20,32 +54,51 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
 github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
 github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
+github.com/mattn/go-isatty v0.0.3/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
 github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/mitchellh/cli v1.0.0/go.mod h1:hNIlj7HEI86fIcpObd7a0FcrxTWetlwJDGcceTlRvqc=
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 github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
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+github.com/posener/complete v1.1.1/go.mod h1:em0nMJCgc9GFtwrmVmEMR/ZL6WyhyjMBndrE9hABlRI=
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 github.com/rogpeppe/go-internal v1.13.1/go.mod h1:uMEvuHeurkdAXX61udpOXGD/AzZDWNMNyH2VO9fmH0o=
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 github.com/rs/zerolog v1.34.0/go.mod h1:bJsvje4Z08ROH4Nhs5iH600c3IkWhwp44iRc54W6wYQ=
+github.com/ryanuber/columnize v2.1.0+incompatible/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
+github.com/ryanuber/go-glob v1.0.0 h1:iQh3xXAumdQ+4Ufa5b25cRpC5TYKlno6hsv6Cb3pkBk=
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+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.5.2 h1:xuMeJ0Sdp5ZMRXx/aWO6RZxdr3beISkG5/G/aIRr3pY=
 github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
 github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/zenazn/pkcs7pad v0.0.0-20170308005700-253a5b1f0e03 h1:m1h+vudopHsI67FPT9MOncyndWhTcdUoBtI1R1uajGY=
 github.com/zenazn/pkcs7pad v0.0.0-20170308005700-253a5b1f0e03/go.mod h1:8sheVFH84v3PCyFY/O02mIgSQY9I6wMYPWsq7mDnEZY=
 golang.org/x/crypto v0.36.0 h1:AnAEvhDddvBdpY+uR+MyHmuZzzNqXSe/GvuDeob5L34=
 golang.org/x/crypto v0.36.0/go.mod h1:Y4J0ReaxCR1IMaabaSMugxJES1EpwhBHhv2bDHklZvc=
+golang.org/x/net v0.38.0 h1:vRMAPTMaeGqVhG5QyLJHqNDwecKTomGeqbnfZyKlBI8=
+golang.org/x/net v0.38.0/go.mod h1:ivrbrMbzFq5J41QOQh0siUuly180yBYtLp+CKbEaFx8=
+golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -53,6 +106,8 @@ golang.org/x/sys v0.31.0 h1:ioabZlmFYtWhL+TRYpcnNlLwhyxaM9kWTDEmfnprqik=
 golang.org/x/sys v0.31.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
 golang.org/x/text v0.23.0 h1:D71I7dUrlY+VX0gQShAThNGHFxZ13dGLBHQLVl1mJlY=
 golang.org/x/text v0.23.0/go.mod h1:/BLNzu4aZCJ1+kcD0DNRotWKage4q2rGVAg4o22unh4=
+golang.org/x/time v0.0.0-20200416051211-89c76fbcd5d1 h1:NusfzzA6yGQ+ua51ck7E3omNUX/JuqbFSaRGqU8CcLI=
+golang.org/x/time v0.0.0-20200416051211-89c76fbcd5d1/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
@@ -60,5 +115,6 @@ gopkg.in/natefinch/lumberjack.v2 v2.2.1 h1:bBRl1b0OH9s/DuPhuXpNl+VtCaJXFZ5/uEFST
 gopkg.in/natefinch/lumberjack.v2 v2.2.1/go.mod h1:YD8tP3GAjkrDg1eZH7EGmyESg/lsYskCTPBJVb9jqSc=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

pkg/plugin/implementation/keymanager/cmd/plugin.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+	"context"
+
+	"github.com/beckn/beckn-onix/pkg/log"
+	"github.com/beckn/beckn-onix/pkg/plugin/definition"
+	"github.com/beckn/beckn-onix/pkg/plugin/implementation/keymanager"
+)
+
+// keyManagerProvider implements the plugin provider for the KeyManager plugin.
+type keyManagerProvider struct{}
+
+// New creates and initializes a new KeyManager instance using the provided cache, registry lookup, and configuration.
+func (k *keyManagerProvider) New(ctx context.Context, cache definition.Cache, registry definition.RegistryLookup, cfg map[string]string) (definition.KeyManager, func() error, error) {
+	config := &keymanager.Config{
+		VaultAddr: cfg["vault_addr"],
+		KVVersion: cfg["kv_version"],
+	}
+	log.Debugf(ctx, "Keymanager config mapped: %+v", cfg)
+	km, cleanup, err := keymanager.New(ctx, cache, registry, config)
+	if err != nil {
+		log.Error(ctx, err, "Failed to initialize KeyManager")
+		return nil, nil, err
+	}
+	log.Debugf(ctx, "KeyManager instance created successfully")
+	return km, cleanup, nil
+}
+
+// Provider is the exported instance of keyManagerProvider used for plugin registration.
+var Provider = keyManagerProvider{}

pkg/plugin/implementation/keymanager/keymanager.go

@@ -0,0 +1,370 @@
+package keymanager
+
+import (
+	"context"
+	"crypto/ecdh"
+	"crypto/ed25519"
+	"crypto/rand"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/beckn/beckn-onix/pkg/log"
+	"github.com/beckn/beckn-onix/pkg/model"
+	"github.com/beckn/beckn-onix/pkg/plugin/definition"
+	"github.com/google/uuid"
+	vault "github.com/hashicorp/vault/api"
+)
+
+// Config holds configuration parameters for connecting to Vault.
+type Config struct {
+	VaultAddr string
+	KVVersion string
+}
+
+// KeyMgr provides methods for managing cryptographic keys using Vault.
+type KeyMgr struct {
+	VaultClient *vault.Client
+	Registry    definition.RegistryLookup
+	Cache       definition.Cache
+	KvVersion   string
+	SecretPath  string
+}
+
+var (
+	// ErrEmptyKeyID indicates that the provided key ID is empty.
+	ErrEmptyKeyID = errors.New("invalid request: keyID cannot be empty")
+
+	// ErrNilKeySet indicates that the provided keyset is nil.
+	ErrNilKeySet = errors.New("keyset cannot be nil")
+
+	// ErrEmptySubscriberID indicates that the provided subscriber ID is empty.
+	ErrEmptySubscriberID = errors.New("invalid request: subscriberID cannot be empty")
+
+	// ErrEmptyUniqueKeyID indicates that the provided unique key ID is empty.
+	ErrEmptyUniqueKeyID = errors.New("invalid request: uniqueKeyID cannot be empty")
+
+	// ErrSubscriberNotFound indicates that no subscriber was found with the provided credentials.
+	ErrSubscriberNotFound = errors.New("no subscriber found with given credentials")
+
+	// ErrNilCache indicates that the cache implementation is nil.
+	ErrNilCache = errors.New("cache implementation cannot be nil")
+
+	// ErrNilRegistryLookup indicates that the registry lookup implementation is nil.
+	ErrNilRegistryLookup = errors.New("registry lookup implementation cannot be nil")
+)
+
+// ValidateCfg validates the Vault configuration and sets default KV version if missing.
+func ValidateCfg(cfg *Config) error {
+	if cfg.VaultAddr == "" {
+		return errors.New("invalid config: VaultAddr cannot be empty")
+	}
+	if cfg.KVVersion == "" {
+		cfg.KVVersion = "v1"
+	} else if cfg.KVVersion != "v1" && cfg.KVVersion != "v2" {
+		return fmt.Errorf("invalid KVVersion: must be 'v1' or 'v2'")
+	}
+	return nil
+}
+
+func New(ctx context.Context, cache definition.Cache, registryLookup definition.RegistryLookup, cfg *Config) (*KeyMgr, func() error, error) {
+	log.Info(ctx, "Initializing KeyManager plugin")
+	// Validate configuration.
+	if err := ValidateCfg(cfg); err != nil {
+		log.Error(ctx, err, "Invalid configuration for KeyManager")
+		return nil, nil, err
+	}
+	// Check if cache implementation is provided.
+	if cache == nil {
+		log.Error(ctx, ErrNilCache, "Cache is nil in KeyManager initialization")
+		return nil, nil, ErrNilCache
+	}
+
+	// Check if registry lookup implementation is provided.
+	if registryLookup == nil {
+		log.Error(ctx, ErrNilRegistryLookup, "RegistryLookup is nil in KeyManager initialization")
+		return nil, nil, ErrNilRegistryLookup
+	}
+
+	// Initialize Vault client.
+	log.Debugf(ctx, "Creating Vault client with address: %s", cfg.VaultAddr)
+	vaultClient, err := GetVaultClient(ctx, cfg.VaultAddr)
+	if err != nil {
+		log.Errorf(ctx, err, "Failed to create Vault client at address: %s", cfg.VaultAddr)
+		return nil, nil, fmt.Errorf("failed to create vault client: %w", err)
+	}
+
+	log.Info(ctx, "Successfully created Vault client")
+
+	// Create KeyManager instance.
+	km := &KeyMgr{
+		VaultClient: vaultClient,
+		Registry:    registryLookup,
+		Cache:       cache,
+		KvVersion:   cfg.KVVersion,
+	}
+
+	// Cleanup function to release KeyManager resources.
+	cleanup := func() error {
+		log.Info(ctx, "Cleaning up KeyManager resources")
+		km.VaultClient = nil
+		km.Cache = nil
+		km.Registry = nil
+		return nil
+	}
+
+	log.Info(ctx, "KeyManager plugin initialized successfully")
+	return km, cleanup, nil
+}
+
+// GetVaultClient creates and authenticates a Vault client using AppRole.
+func GetVaultClient(ctx context.Context, vaultAddr string) (*vault.Client, error) {
+	roleID := os.Getenv("VAULT_ROLE_ID")
+	secretID := os.Getenv("VAULT_SECRET_ID")
+
+	if roleID == "" || secretID == "" {
+		log.Error(ctx, fmt.Errorf("missing credentials"), "VAULT_ROLE_ID or VAULT_SECRET_ID is not set")
+		return nil, fmt.Errorf("VAULT_ROLE_ID or VAULT_SECRET_ID is not set")
+	}
+
+	config := vault.DefaultConfig()
+	config.Address = vaultAddr
+
+	client, err := vault.NewClient(config)
+	if err != nil {
+		log.Error(ctx, err, "failed to create Vault client")
+		return nil, fmt.Errorf("failed to create Vault client: %w", err)
+	}
+
+	data := map[string]interface{}{
+		"role_id":   roleID,
+		"secret_id": secretID,
+	}
+
+	log.Info(ctx, "Logging into Vault with AppRole")
+	resp, err := client.Logical().Write("auth/approle/login", data)
+	if err != nil {
+		log.Error(ctx, err, "failed to login with AppRole")
+		return nil, fmt.Errorf("failed to login with AppRole: %w", err)
+	}
+	if resp == nil || resp.Auth == nil {
+		log.Error(ctx, nil, "AppRole login failed: no auth info returned")
+		return nil, errors.New("AppRole login failed: no auth info returned")
+	}
+
+	log.Info(ctx, "Vault login successful")
+	client.SetToken(resp.Auth.ClientToken)
+	return client, nil
+}
+
+// GenerateKeyPairs generates a new signing (Ed25519) and encryption (X25519) key pair.
+func (km *KeyMgr) GenerateKeyPairs() (*model.Keyset, error) {
+	signingPublic, signingPrivate, err := ed25519.GenerateKey(rand.Reader)
+	if err != nil {
+		return nil, fmt.Errorf("failed to generate signing key pair: %w", err)
+	}
+
+	encrPrivateKey, err := ecdh.X25519().GenerateKey(rand.Reader)
+	if err != nil {
+		return nil, fmt.Errorf("failed to generate encryption key pair: %w", err)
+	}
+	encrPublicKey := encrPrivateKey.PublicKey().Bytes()
+	uuid, err := uuid.NewRandom()
+	if err != nil {
+		return nil, fmt.Errorf("failed to generate unique key id uuid: %w", err)
+	}
+	return &model.Keyset{
+		UniqueKeyID:    uuid.String(),
+		SigningPrivate: encodeBase64(signingPrivate.Seed()),
+		SigningPublic:  encodeBase64(signingPublic),
+		EncrPrivate:    encodeBase64(encrPrivateKey.Bytes()),
+		EncrPublic:     encodeBase64(encrPublicKey),
+	}, nil
+}
+
+// StorePrivateKeys stores the given keyset in Vault under the specified key ID.
+func (km *KeyMgr) StorePrivateKeys(ctx context.Context, keyID string, keys *model.Keyset) error {
+	if keyID == "" {
+		return ErrEmptyKeyID
+	}
+	if keys == nil {
+		return ErrNilKeySet
+	}
+
+	keyData := map[string]interface{}{
+		"uniqueKeyID":       keys.UniqueKeyID,
+		"signingPublicKey":  keys.SigningPublic,
+		"signingPrivateKey": keys.SigningPrivate,
+		"encrPublicKey":     keys.EncrPublic,
+		"encrPrivateKey":    keys.EncrPrivate,
+	}
+	var path string
+	var payload map[string]interface{}
+	if km.KvVersion == "v2" {
+		path = fmt.Sprintf("secret/data/keys/%s", keyID)
+		payload = map[string]interface{}{"data": keyData}
+	} else {
+		path = fmt.Sprintf("secret/keys/%s", keyID)
+		payload = keyData
+	}
+
+	_, err := km.VaultClient.Logical().Write(path, payload)
+	if err != nil {
+		return fmt.Errorf("failed to store secret in Vault: %w", err)
+	}
+	return nil
+}
+
+// SigningPrivateKey retrieves the unique key ID and signing private key for the given key ID.
+func (km *KeyMgr) SigningPrivateKey(ctx context.Context, keyID string) (string, string, error) {
+	keys, err := km.getKeys(ctx, keyID)
+	if err != nil {
+		return "", "", err
+	}
+	return keys.UniqueKeyID, keys.SigningPrivate, nil
+}
+
+// EncrPrivateKey retrieves the unique key ID and encryption private key for the given key ID.
+func (km *KeyMgr) EncrPrivateKey(ctx context.Context, keyID string) (string, string, error) {
+	keys, err := km.getKeys(ctx, keyID)
+	if err != nil {
+		return "", "", err
+	}
+	return keys.UniqueKeyID, keys.EncrPrivate, nil
+}
+
+// SigningPublicKey returns the signing public key for the given subscriber ID and key ID.
+func (km *KeyMgr) SigningPublicKey(ctx context.Context, subscriberID, uniqueKeyID string) (string, error) {
+	keys, err := km.getPublicKeys(ctx, subscriberID, uniqueKeyID)
+	if err != nil {
+		return "", err
+	}
+	return keys.SigningPublic, nil
+}
+
+// EncrPublicKey returns the encryption public key for the given subscriber ID and key ID.
+func (km *KeyMgr) EncrPublicKey(ctx context.Context, subscriberID, uniqueKeyID string) (string, error) {
+	keys, err := km.getPublicKeys(ctx, subscriberID, uniqueKeyID)
+	if err != nil {
+		return "", err
+	}
+	return keys.EncrPublic, nil
+}
+
+// DeletePrivateKeys deletes the private keys for the given key ID from Vault.
+func (km *KeyMgr) DeletePrivateKeys(ctx context.Context, keyID string) error {
+	if keyID == "" {
+		return ErrEmptyKeyID
+	}
+	var path string
+	if km.KvVersion == "v2" {
+		path = fmt.Sprintf("secret/data/private_keys/%s", keyID)
+	} else {
+		path = fmt.Sprintf("secret/private_keys/%s", keyID)
+	}
+	return km.VaultClient.KVv2(path).Delete(ctx, keyID)
+}
+
+// getKeys retrieves the full keyset from Vault for the given key ID.
+func (km *KeyMgr) getKeys(ctx context.Context, keyID string) (*model.Keyset, error) {
+	if keyID == "" {
+		return nil, ErrEmptyKeyID
+	}
+
+	var path string
+	if km.KvVersion == "v2" {
+		path = fmt.Sprintf("secret/data/private_keys/%s", keyID)
+	} else {
+		path = fmt.Sprintf("secret/private_keys/%s", keyID)
+	}
+
+	secret, err := km.VaultClient.Logical().Read(path)
+	if err != nil || secret == nil {
+		return nil, fmt.Errorf("failed to read secret from Vault: %w", err)
+	}
+
+	var data map[string]interface{}
+	if km.KvVersion == "v2" {
+		dataRaw, ok := secret.Data["data"]
+		if !ok {
+			return nil, errors.New("missing 'data' in secret response")
+		}
+		data, ok = dataRaw.(map[string]interface{})
+		if !ok {
+			return nil, errors.New("invalid 'data' format in Vault response")
+		}
+	} else {
+		data = secret.Data
+	}
+
+	return &model.Keyset{
+		UniqueKeyID:    data["uniqueKeyID"].(string),
+		SigningPublic:  data["signingPublicKey"].(string),
+		SigningPrivate: data["signingPrivateKey"].(string),
+		EncrPublic:     data["encrPublicKey"].(string),
+		EncrPrivate:    data["encrPrivateKey"].(string),
+	}, nil
+}
+
+// getPublicKeys fetches the public keys from cache or registry for the given subscriber and key ID.
+func (km *KeyMgr) getPublicKeys(ctx context.Context, subscriberID, uniqueKeyID string) (*model.Keyset, error) {
+	if err := validateParams(subscriberID, uniqueKeyID); err != nil {
+		return nil, err
+	}
+	cacheKey := fmt.Sprintf("%s_%s", subscriberID, uniqueKeyID)
+	cachedData, err := km.Cache.Get(ctx, cacheKey)
+	if err == nil {
+		var keys model.Keyset
+		if err := json.Unmarshal([]byte(cachedData), &keys); err == nil {
+			return &keys, nil
+		}
+	}
+	publicKeys, err := km.lookupRegistry(ctx, subscriberID, uniqueKeyID)
+	if err != nil {
+		return nil, err
+	}
+	cacheValue, err := json.Marshal(publicKeys)
+	if err == nil {
+		_ = km.Cache.Set(ctx, cacheKey, string(cacheValue), time.Hour)
+	}
+	return publicKeys, nil
+}
+
+// lookupRegistry queries the registry for public keys based on subscriber ID and key ID.
+func (km *KeyMgr) lookupRegistry(ctx context.Context, subscriberID, uniqueKeyID string) (*model.Keyset, error) {
+	subscribers, err := km.Registry.Lookup(ctx, &model.Subscription{
+		Subscriber: model.Subscriber{
+			SubscriberID: subscriberID,
+		},
+		KeyID: uniqueKeyID,
+	})
+	if err != nil {
+		return nil, fmt.Errorf("failed to lookup registry: %w", err)
+	}
+	if len(subscribers) == 0 {
+		return nil, ErrSubscriberNotFound
+	}
+	return &model.Keyset{
+		SigningPublic: subscribers[0].SigningPublicKey,
+		EncrPublic:    subscribers[0].EncrPublicKey,
+	}, nil
+}
+
+// validateParams checks that subscriberID and uniqueKeyID are not empty.
+func validateParams(subscriberID, uniqueKeyID string) error {
+	if subscriberID == "" {
+		return ErrEmptySubscriberID
+	}
+	if uniqueKeyID == "" {
+		return ErrEmptyUniqueKeyID
+	}
+	return nil
+}
+
+// encodeBase64 returns the base64-encoded string of the given data.
+func encodeBase64(data []byte) string {
+	return base64.StdEncoding.EncodeToString(data)
+}