Add certificate revocation, deletion, and retrieval

Admins can now revoke or delete certificate records from the cert detail
page in the web UI. Revoked certificates display a [REVOKED] badge and
show revocation metadata (time and actor). Deletion redirects to the
issuer page.

The REST API gains three new authenticated endpoints that mirror the
gRPC surface:
  GET    /v1/ca/{mount}/cert/{serial}         (auth required)
  POST   /v1/ca/{mount}/cert/{serial}/revoke  (admin only)
  DELETE /v1/ca/{mount}/cert/{serial}         (admin only)

The CA engine stores revocation state (revoked, revoked_at, revoked_by)
directly in the existing CertRecord barrier entry. The proto CertRecord
message is extended with the same three fields (field numbers 10–12).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.junie/memory/feedback.md

@@ -14,3 +14,11 @@
     "NEW INSTRUCTION": "WHEN editing gRPC server configuration THEN remove v1 config and use only v2 fields"
 }
 
+[2026-03-15 13:34] - Updated by Junie
+{
+    "TYPE": "negative",
+    "CATEGORY": "tarball download",
+    "EXPECTATION": "The tarball download should succeed, or clearly show an error in the browser when it fails.",
+    "NEW INSTRUCTION": "WHEN implementing download endpoints THEN return non-200 on failure with an explanatory message"
+}
+

.junie/memory/language.json

@@ -1 +1 @@
-[{"lang":"en","usageCount":36}]
+[{"lang":"en","usageCount":37}]

gen/metacrypt/v1/acme.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.11
-// 	protoc        v6.33.4
+// 	protoc        v3.20.3
 // source: proto/metacrypt/v1/acme.proto
 
 package metacryptv1

gen/metacrypt/v1/acme_grpc.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
 // - protoc-gen-go-grpc v1.6.1
-// - protoc             v6.33.4
+// - protoc             v3.20.3
 // source: proto/metacrypt/v1/acme.proto
 
 package metacryptv1

gen/metacrypt/v1/auth.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.11
-// 	protoc        v6.33.4
+// 	protoc        v3.20.3
 // source: proto/metacrypt/v1/auth.proto
 
 package metacryptv1

gen/metacrypt/v1/auth_grpc.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
 // - protoc-gen-go-grpc v1.6.1
-// - protoc             v6.33.4
+// - protoc             v3.20.3
 // source: proto/metacrypt/v1/auth.proto
 
 package metacryptv1

gen/metacrypt/v1/common.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.11
-// 	protoc        v6.33.4
+// 	protoc        v3.20.3
 // source: proto/metacrypt/v1/common.proto
 
 package metacryptv1

gen/metacrypt/v1/engine.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.11
-// 	protoc        v6.33.4
+// 	protoc        v3.20.3
 // source: proto/metacrypt/v1/engine.proto
 
 package metacryptv1

gen/metacrypt/v1/engine_grpc.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
 // - protoc-gen-go-grpc v1.6.1
-// - protoc             v6.33.4
+// - protoc             v3.20.3
 // source: proto/metacrypt/v1/engine.proto
 
 package metacryptv1

gen/metacrypt/v1/pki.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.11
-// 	protoc        v6.33.4
+// 	protoc        v3.20.3
 // source: proto/metacrypt/v1/pki.proto
 
 package metacryptv1

gen/metacrypt/v1/pki_grpc.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
 // - protoc-gen-go-grpc v1.6.1
-// - protoc             v6.33.4
+// - protoc             v3.20.3
 // source: proto/metacrypt/v1/pki.proto
 
 package metacryptv1

gen/metacrypt/v1/policy.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.11
-// 	protoc        v6.33.4
+// 	protoc        v3.20.3
 // source: proto/metacrypt/v1/policy.proto
 
 package metacryptv1

gen/metacrypt/v1/policy_grpc.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
 // - protoc-gen-go-grpc v1.6.1
-// - protoc             v6.33.4
+// - protoc             v3.20.3
 // source: proto/metacrypt/v1/policy.proto
 
 package metacryptv1

gen/metacrypt/v1/system.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.11
-// 	protoc        v6.33.4
+// 	protoc        v3.20.3
 // source: proto/metacrypt/v1/system.proto
 
 package metacryptv1

gen/metacrypt/v1/system_grpc.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
 // - protoc-gen-go-grpc v1.6.1
-// - protoc             v6.33.4
+// - protoc             v3.20.3
 // source: proto/metacrypt/v1/system.proto
 
 package metacryptv1

gen/metacrypt/v2/ca.pb.go

@@ -1484,6 +1484,198 @@ func (x *SignCSRResponse) GetChainPem() []byte {
 	return nil
 }
 
+type RevokeCertRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Mount         string                 `protobuf:"bytes,1,opt,name=mount,proto3" json:"mount,omitempty"`
+	Serial        string                 `protobuf:"bytes,2,opt,name=serial,proto3" json:"serial,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *RevokeCertRequest) Reset() {
+	*x = RevokeCertRequest{}
+	mi := &file_proto_metacrypt_v2_ca_proto_msgTypes[24]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *RevokeCertRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RevokeCertRequest) ProtoMessage() {}
+
+func (x *RevokeCertRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_metacrypt_v2_ca_proto_msgTypes[24]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RevokeCertRequest.ProtoReflect.Descriptor instead.
+func (*RevokeCertRequest) Descriptor() ([]byte, []int) {
+	return file_proto_metacrypt_v2_ca_proto_rawDescGZIP(), []int{24}
+}
+
+func (x *RevokeCertRequest) GetMount() string {
+	if x != nil {
+		return x.Mount
+	}
+	return ""
+}
+
+func (x *RevokeCertRequest) GetSerial() string {
+	if x != nil {
+		return x.Serial
+	}
+	return ""
+}
+
+type RevokeCertResponse struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Serial        string                 `protobuf:"bytes,1,opt,name=serial,proto3" json:"serial,omitempty"`
+	RevokedAt     *timestamppb.Timestamp `protobuf:"bytes,2,opt,name=revoked_at,json=revokedAt,proto3" json:"revoked_at,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *RevokeCertResponse) Reset() {
+	*x = RevokeCertResponse{}
+	mi := &file_proto_metacrypt_v2_ca_proto_msgTypes[25]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *RevokeCertResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RevokeCertResponse) ProtoMessage() {}
+
+func (x *RevokeCertResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_metacrypt_v2_ca_proto_msgTypes[25]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RevokeCertResponse.ProtoReflect.Descriptor instead.
+func (*RevokeCertResponse) Descriptor() ([]byte, []int) {
+	return file_proto_metacrypt_v2_ca_proto_rawDescGZIP(), []int{25}
+}
+
+func (x *RevokeCertResponse) GetSerial() string {
+	if x != nil {
+		return x.Serial
+	}
+	return ""
+}
+
+func (x *RevokeCertResponse) GetRevokedAt() *timestamppb.Timestamp {
+	if x != nil {
+		return x.RevokedAt
+	}
+	return nil
+}
+
+type DeleteCertRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Mount         string                 `protobuf:"bytes,1,opt,name=mount,proto3" json:"mount,omitempty"`
+	Serial        string                 `protobuf:"bytes,2,opt,name=serial,proto3" json:"serial,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *DeleteCertRequest) Reset() {
+	*x = DeleteCertRequest{}
+	mi := &file_proto_metacrypt_v2_ca_proto_msgTypes[26]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *DeleteCertRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DeleteCertRequest) ProtoMessage() {}
+
+func (x *DeleteCertRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_metacrypt_v2_ca_proto_msgTypes[26]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use DeleteCertRequest.ProtoReflect.Descriptor instead.
+func (*DeleteCertRequest) Descriptor() ([]byte, []int) {
+	return file_proto_metacrypt_v2_ca_proto_rawDescGZIP(), []int{26}
+}
+
+func (x *DeleteCertRequest) GetMount() string {
+	if x != nil {
+		return x.Mount
+	}
+	return ""
+}
+
+func (x *DeleteCertRequest) GetSerial() string {
+	if x != nil {
+		return x.Serial
+	}
+	return ""
+}
+
+type DeleteCertResponse struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *DeleteCertResponse) Reset() {
+	*x = DeleteCertResponse{}
+	mi := &file_proto_metacrypt_v2_ca_proto_msgTypes[27]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *DeleteCertResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DeleteCertResponse) ProtoMessage() {}
+
+func (x *DeleteCertResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_metacrypt_v2_ca_proto_msgTypes[27]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use DeleteCertResponse.ProtoReflect.Descriptor instead.
+func (*DeleteCertResponse) Descriptor() ([]byte, []int) {
+	return file_proto_metacrypt_v2_ca_proto_rawDescGZIP(), []int{27}
+}
+
 // CertRecord is the full certificate record including the PEM-encoded cert.
 type CertRecord struct {
 	state      protoimpl.MessageState `protogen:"open.v1"`
@@ -1497,13 +1689,19 @@ type CertRecord struct {
 	ExpiresAt  *timestamppb.Timestamp `protobuf:"bytes,8,opt,name=expires_at,json=expiresAt,proto3" json:"expires_at,omitempty"`
 	// cert_pem is the PEM-encoded certificate.
 	CertPem []byte `protobuf:"bytes,9,opt,name=cert_pem,json=certPem,proto3" json:"cert_pem,omitempty"`
+	// revoked indicates whether the certificate has been revoked.
+	Revoked bool `protobuf:"varint,10,opt,name=revoked,proto3" json:"revoked,omitempty"`
+	// revoked_at is the time the certificate was revoked, if applicable.
+	RevokedAt *timestamppb.Timestamp `protobuf:"bytes,11,opt,name=revoked_at,json=revokedAt,proto3" json:"revoked_at,omitempty"`
+	// revoked_by is the username of the admin who revoked the certificate.
+	RevokedBy     string `protobuf:"bytes,12,opt,name=revoked_by,json=revokedBy,proto3" json:"revoked_by,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
 
 func (x *CertRecord) Reset() {
 	*x = CertRecord{}
-	mi := &file_proto_metacrypt_v2_ca_proto_msgTypes[24]
+	mi := &file_proto_metacrypt_v2_ca_proto_msgTypes[28]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1515,7 +1713,7 @@ func (x *CertRecord) String() string {
 func (*CertRecord) ProtoMessage() {}
 
 func (x *CertRecord) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_metacrypt_v2_ca_proto_msgTypes[24]
+	mi := &file_proto_metacrypt_v2_ca_proto_msgTypes[28]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1528,7 +1726,7 @@ func (x *CertRecord) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CertRecord.ProtoReflect.Descriptor instead.
 func (*CertRecord) Descriptor() ([]byte, []int) {
-	return file_proto_metacrypt_v2_ca_proto_rawDescGZIP(), []int{24}
+	return file_proto_metacrypt_v2_ca_proto_rawDescGZIP(), []int{28}
 }
 
 func (x *CertRecord) GetSerial() string {
@@ -1594,6 +1792,27 @@ func (x *CertRecord) GetCertPem() []byte {
 	return nil
 }
 
+func (x *CertRecord) GetRevoked() bool {
+	if x != nil {
+		return x.Revoked
+	}
+	return false
+}
+
+func (x *CertRecord) GetRevokedAt() *timestamppb.Timestamp {
+	if x != nil {
+		return x.RevokedAt
+	}
+	return nil
+}
+
+func (x *CertRecord) GetRevokedBy() string {
+	if x != nil {
+		return x.RevokedBy
+	}
+	return ""
+}
+
 // CertSummary is a lightweight certificate record without the PEM data,
 // suitable for list responses.
 type CertSummary struct {
@@ -1611,7 +1830,7 @@ type CertSummary struct {
 
 func (x *CertSummary) Reset() {
 	*x = CertSummary{}
-	mi := &file_proto_metacrypt_v2_ca_proto_msgTypes[25]
+	mi := &file_proto_metacrypt_v2_ca_proto_msgTypes[29]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1623,7 +1842,7 @@ func (x *CertSummary) String() string {
 func (*CertSummary) ProtoMessage() {}
 
 func (x *CertSummary) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_metacrypt_v2_ca_proto_msgTypes[25]
+	mi := &file_proto_metacrypt_v2_ca_proto_msgTypes[29]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1636,7 +1855,7 @@ func (x *CertSummary) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CertSummary.ProtoReflect.Descriptor instead.
 func (*CertSummary) Descriptor() ([]byte, []int) {
-	return file_proto_metacrypt_v2_ca_proto_rawDescGZIP(), []int{25}
+	return file_proto_metacrypt_v2_ca_proto_rawDescGZIP(), []int{29}
 }
 
 func (x *CertSummary) GetSerial() string {
@@ -1798,7 +2017,18 @@ const file_proto_metacrypt_v2_ca_proto_rawDesc = "" +
 	"\n" +
 	"expires_at\x18\x05 \x01(\v2\x1a.google.protobuf.TimestampR\texpiresAt\x12\x19\n" +
 	"\bcert_pem\x18\x06 \x01(\fR\acertPem\x12\x1b\n" +
-	"\tchain_pem\x18\a \x01(\fR\bchainPem\"\xb7\x02\n" +
+	"\tchain_pem\x18\a \x01(\fR\bchainPem\"A\n" +
+	"\x11RevokeCertRequest\x12\x14\n" +
+	"\x05mount\x18\x01 \x01(\tR\x05mount\x12\x16\n" +
+	"\x06serial\x18\x02 \x01(\tR\x06serial\"g\n" +
+	"\x12RevokeCertResponse\x12\x16\n" +
+	"\x06serial\x18\x01 \x01(\tR\x06serial\x129\n" +
+	"\n" +
+	"revoked_at\x18\x02 \x01(\v2\x1a.google.protobuf.TimestampR\trevokedAt\"A\n" +
+	"\x11DeleteCertRequest\x12\x14\n" +
+	"\x05mount\x18\x01 \x01(\tR\x05mount\x12\x16\n" +
+	"\x06serial\x18\x02 \x01(\tR\x06serial\"\x14\n" +
+	"\x12DeleteCertResponse\"\xab\x03\n" +
 	"\n" +
 	"CertRecord\x12\x16\n" +
 	"\x06serial\x18\x01 \x01(\tR\x06serial\x12\x16\n" +
@@ -1811,7 +2041,13 @@ const file_proto_metacrypt_v2_ca_proto_rawDesc = "" +
 	"\tissued_at\x18\a \x01(\v2\x1a.google.protobuf.TimestampR\bissuedAt\x129\n" +
 	"\n" +
 	"expires_at\x18\b \x01(\v2\x1a.google.protobuf.TimestampR\texpiresAt\x12\x19\n" +
-	"\bcert_pem\x18\t \x01(\fR\acertPem\"\x89\x02\n" +
+	"\bcert_pem\x18\t \x01(\fR\acertPem\x12\x18\n" +
+	"\arevoked\x18\n" +
+	" \x01(\bR\arevoked\x129\n" +
+	"\n" +
+	"revoked_at\x18\v \x01(\v2\x1a.google.protobuf.TimestampR\trevokedAt\x12\x1d\n" +
+	"\n" +
+	"revoked_by\x18\f \x01(\tR\trevokedBy\"\x89\x02\n" +
 	"\vCertSummary\x12\x16\n" +
 	"\x06serial\x18\x01 \x01(\tR\x06serial\x12\x16\n" +
 	"\x06issuer\x18\x02 \x01(\tR\x06issuer\x12\x1f\n" +
@@ -1821,7 +2057,7 @@ const file_proto_metacrypt_v2_ca_proto_rawDesc = "" +
 	"\tissued_by\x18\x05 \x01(\tR\bissuedBy\x127\n" +
 	"\tissued_at\x18\x06 \x01(\v2\x1a.google.protobuf.TimestampR\bissuedAt\x129\n" +
 	"\n" +
-	"expires_at\x18\a \x01(\v2\x1a.google.protobuf.TimestampR\texpiresAt2\xcb\a\n" +
+	"expires_at\x18\a \x01(\v2\x1a.google.protobuf.TimestampR\texpiresAt2\xed\b\n" +
 	"\tCAService\x12O\n" +
 	"\n" +
 	"ImportRoot\x12\x1f.metacrypt.v2.ImportRootRequest\x1a .metacrypt.v2.ImportRootResponse\x12F\n" +
@@ -1835,7 +2071,11 @@ const file_proto_metacrypt_v2_ca_proto_rawDesc = "" +
 	"\aGetCert\x12\x1c.metacrypt.v2.GetCertRequest\x1a\x1d.metacrypt.v2.GetCertResponse\x12L\n" +
 	"\tListCerts\x12\x1e.metacrypt.v2.ListCertsRequest\x1a\x1f.metacrypt.v2.ListCertsResponse\x12L\n" +
 	"\tRenewCert\x12\x1e.metacrypt.v2.RenewCertRequest\x1a\x1f.metacrypt.v2.RenewCertResponse\x12F\n" +
-	"\aSignCSR\x12\x1c.metacrypt.v2.SignCSRRequest\x1a\x1d.metacrypt.v2.SignCSRResponseB>Z<git.wntrmute.dev/kyle/metacrypt/gen/metacrypt/v2;metacryptv2b\x06proto3"
+	"\aSignCSR\x12\x1c.metacrypt.v2.SignCSRRequest\x1a\x1d.metacrypt.v2.SignCSRResponse\x12O\n" +
+	"\n" +
+	"RevokeCert\x12\x1f.metacrypt.v2.RevokeCertRequest\x1a .metacrypt.v2.RevokeCertResponse\x12O\n" +
+	"\n" +
+	"DeleteCert\x12\x1f.metacrypt.v2.DeleteCertRequest\x1a .metacrypt.v2.DeleteCertResponseB>Z<git.wntrmute.dev/kyle/metacrypt/gen/metacrypt/v2;metacryptv2b\x06proto3"
 
 var (
 	file_proto_metacrypt_v2_ca_proto_rawDescOnce sync.Once
@@ -1849,7 +2089,7 @@ func file_proto_metacrypt_v2_ca_proto_rawDescGZIP() []byte {
 	return file_proto_metacrypt_v2_ca_proto_rawDescData
 }
 
-var file_proto_metacrypt_v2_ca_proto_msgTypes = make([]protoimpl.MessageInfo, 26)
+var file_proto_metacrypt_v2_ca_proto_msgTypes = make([]protoimpl.MessageInfo, 30)
 var file_proto_metacrypt_v2_ca_proto_goTypes = []any{
 	(*ImportRootRequest)(nil),         // 0: metacrypt.v2.ImportRootRequest
 	(*ImportRootResponse)(nil),        // 1: metacrypt.v2.ImportRootResponse
@@ -1875,50 +2115,60 @@ var file_proto_metacrypt_v2_ca_proto_goTypes = []any{
 	(*RenewCertResponse)(nil),         // 21: metacrypt.v2.RenewCertResponse
 	(*SignCSRRequest)(nil),            // 22: metacrypt.v2.SignCSRRequest
 	(*SignCSRResponse)(nil),           // 23: metacrypt.v2.SignCSRResponse
-	(*CertRecord)(nil),                // 24: metacrypt.v2.CertRecord
+	(*RevokeCertRequest)(nil),         // 24: metacrypt.v2.RevokeCertRequest
-	(*CertSummary)(nil),               // 25: metacrypt.v2.CertSummary
+	(*RevokeCertResponse)(nil),        // 25: metacrypt.v2.RevokeCertResponse
-	(*timestamppb.Timestamp)(nil),     // 26: google.protobuf.Timestamp
+	(*DeleteCertRequest)(nil),         // 26: metacrypt.v2.DeleteCertRequest
+	(*DeleteCertResponse)(nil),        // 27: metacrypt.v2.DeleteCertResponse
+	(*CertRecord)(nil),                // 28: metacrypt.v2.CertRecord
+	(*CertSummary)(nil),               // 29: metacrypt.v2.CertSummary
+	(*timestamppb.Timestamp)(nil),     // 30: google.protobuf.Timestamp
 }
 var file_proto_metacrypt_v2_ca_proto_depIdxs = []int32{
-	26, // 0: metacrypt.v2.ImportRootResponse.expires_at:type_name -> google.protobuf.Timestamp
+	30, // 0: metacrypt.v2.ImportRootResponse.expires_at:type_name -> google.protobuf.Timestamp
-	26, // 1: metacrypt.v2.IssueCertResponse.expires_at:type_name -> google.protobuf.Timestamp
+	30, // 1: metacrypt.v2.IssueCertResponse.expires_at:type_name -> google.protobuf.Timestamp
-	24, // 2: metacrypt.v2.GetCertResponse.cert:type_name -> metacrypt.v2.CertRecord
+	28, // 2: metacrypt.v2.GetCertResponse.cert:type_name -> metacrypt.v2.CertRecord
-	25, // 3: metacrypt.v2.ListCertsResponse.certs:type_name -> metacrypt.v2.CertSummary
+	29, // 3: metacrypt.v2.ListCertsResponse.certs:type_name -> metacrypt.v2.CertSummary
-	26, // 4: metacrypt.v2.RenewCertResponse.expires_at:type_name -> google.protobuf.Timestamp
+	30, // 4: metacrypt.v2.RenewCertResponse.expires_at:type_name -> google.protobuf.Timestamp
-	26, // 5: metacrypt.v2.SignCSRResponse.expires_at:type_name -> google.protobuf.Timestamp
+	30, // 5: metacrypt.v2.SignCSRResponse.expires_at:type_name -> google.protobuf.Timestamp
-	26, // 6: metacrypt.v2.CertRecord.issued_at:type_name -> google.protobuf.Timestamp
+	30, // 6: metacrypt.v2.RevokeCertResponse.revoked_at:type_name -> google.protobuf.Timestamp
-	26, // 7: metacrypt.v2.CertRecord.expires_at:type_name -> google.protobuf.Timestamp
+	30, // 7: metacrypt.v2.CertRecord.issued_at:type_name -> google.protobuf.Timestamp
-	26, // 8: metacrypt.v2.CertSummary.issued_at:type_name -> google.protobuf.Timestamp
+	30, // 8: metacrypt.v2.CertRecord.expires_at:type_name -> google.protobuf.Timestamp
-	26, // 9: metacrypt.v2.CertSummary.expires_at:type_name -> google.protobuf.Timestamp
+	30, // 9: metacrypt.v2.CertRecord.revoked_at:type_name -> google.protobuf.Timestamp
-	0,  // 10: metacrypt.v2.CAService.ImportRoot:input_type -> metacrypt.v2.ImportRootRequest
+	30, // 10: metacrypt.v2.CertSummary.issued_at:type_name -> google.protobuf.Timestamp
-	2,  // 11: metacrypt.v2.CAService.GetRoot:input_type -> metacrypt.v2.GetRootRequest
+	30, // 11: metacrypt.v2.CertSummary.expires_at:type_name -> google.protobuf.Timestamp
-	4,  // 12: metacrypt.v2.CAService.CreateIssuer:input_type -> metacrypt.v2.CreateIssuerRequest
+	0,  // 12: metacrypt.v2.CAService.ImportRoot:input_type -> metacrypt.v2.ImportRootRequest
-	6,  // 13: metacrypt.v2.CAService.DeleteIssuer:input_type -> metacrypt.v2.DeleteIssuerRequest
+	2,  // 13: metacrypt.v2.CAService.GetRoot:input_type -> metacrypt.v2.GetRootRequest
-	8,  // 14: metacrypt.v2.CAService.ListIssuers:input_type -> metacrypt.v2.ListIssuersRequest
+	4,  // 14: metacrypt.v2.CAService.CreateIssuer:input_type -> metacrypt.v2.CreateIssuerRequest
-	10, // 15: metacrypt.v2.CAService.GetIssuer:input_type -> metacrypt.v2.GetIssuerRequest
+	6,  // 15: metacrypt.v2.CAService.DeleteIssuer:input_type -> metacrypt.v2.DeleteIssuerRequest
-	12, // 16: metacrypt.v2.CAService.GetChain:input_type -> metacrypt.v2.CAServiceGetChainRequest
+	8,  // 16: metacrypt.v2.CAService.ListIssuers:input_type -> metacrypt.v2.ListIssuersRequest
-	14, // 17: metacrypt.v2.CAService.IssueCert:input_type -> metacrypt.v2.IssueCertRequest
+	10, // 17: metacrypt.v2.CAService.GetIssuer:input_type -> metacrypt.v2.GetIssuerRequest
-	16, // 18: metacrypt.v2.CAService.GetCert:input_type -> metacrypt.v2.GetCertRequest
+	12, // 18: metacrypt.v2.CAService.GetChain:input_type -> metacrypt.v2.CAServiceGetChainRequest
-	18, // 19: metacrypt.v2.CAService.ListCerts:input_type -> metacrypt.v2.ListCertsRequest
+	14, // 19: metacrypt.v2.CAService.IssueCert:input_type -> metacrypt.v2.IssueCertRequest
-	20, // 20: metacrypt.v2.CAService.RenewCert:input_type -> metacrypt.v2.RenewCertRequest
+	16, // 20: metacrypt.v2.CAService.GetCert:input_type -> metacrypt.v2.GetCertRequest
-	22, // 21: metacrypt.v2.CAService.SignCSR:input_type -> metacrypt.v2.SignCSRRequest
+	18, // 21: metacrypt.v2.CAService.ListCerts:input_type -> metacrypt.v2.ListCertsRequest
-	1,  // 22: metacrypt.v2.CAService.ImportRoot:output_type -> metacrypt.v2.ImportRootResponse
+	20, // 22: metacrypt.v2.CAService.RenewCert:input_type -> metacrypt.v2.RenewCertRequest
-	3,  // 23: metacrypt.v2.CAService.GetRoot:output_type -> metacrypt.v2.GetRootResponse
+	22, // 23: metacrypt.v2.CAService.SignCSR:input_type -> metacrypt.v2.SignCSRRequest
-	5,  // 24: metacrypt.v2.CAService.CreateIssuer:output_type -> metacrypt.v2.CreateIssuerResponse
+	24, // 24: metacrypt.v2.CAService.RevokeCert:input_type -> metacrypt.v2.RevokeCertRequest
-	7,  // 25: metacrypt.v2.CAService.DeleteIssuer:output_type -> metacrypt.v2.DeleteIssuerResponse
+	26, // 25: metacrypt.v2.CAService.DeleteCert:input_type -> metacrypt.v2.DeleteCertRequest
-	9,  // 26: metacrypt.v2.CAService.ListIssuers:output_type -> metacrypt.v2.ListIssuersResponse
+	1,  // 26: metacrypt.v2.CAService.ImportRoot:output_type -> metacrypt.v2.ImportRootResponse
-	11, // 27: metacrypt.v2.CAService.GetIssuer:output_type -> metacrypt.v2.GetIssuerResponse
+	3,  // 27: metacrypt.v2.CAService.GetRoot:output_type -> metacrypt.v2.GetRootResponse
-	13, // 28: metacrypt.v2.CAService.GetChain:output_type -> metacrypt.v2.CAServiceGetChainResponse
+	5,  // 28: metacrypt.v2.CAService.CreateIssuer:output_type -> metacrypt.v2.CreateIssuerResponse
-	15, // 29: metacrypt.v2.CAService.IssueCert:output_type -> metacrypt.v2.IssueCertResponse
+	7,  // 29: metacrypt.v2.CAService.DeleteIssuer:output_type -> metacrypt.v2.DeleteIssuerResponse
-	17, // 30: metacrypt.v2.CAService.GetCert:output_type -> metacrypt.v2.GetCertResponse
+	9,  // 30: metacrypt.v2.CAService.ListIssuers:output_type -> metacrypt.v2.ListIssuersResponse
-	19, // 31: metacrypt.v2.CAService.ListCerts:output_type -> metacrypt.v2.ListCertsResponse
+	11, // 31: metacrypt.v2.CAService.GetIssuer:output_type -> metacrypt.v2.GetIssuerResponse
-	21, // 32: metacrypt.v2.CAService.RenewCert:output_type -> metacrypt.v2.RenewCertResponse
+	13, // 32: metacrypt.v2.CAService.GetChain:output_type -> metacrypt.v2.CAServiceGetChainResponse
-	23, // 33: metacrypt.v2.CAService.SignCSR:output_type -> metacrypt.v2.SignCSRResponse
+	15, // 33: metacrypt.v2.CAService.IssueCert:output_type -> metacrypt.v2.IssueCertResponse
-	22, // [22:34] is the sub-list for method output_type
+	17, // 34: metacrypt.v2.CAService.GetCert:output_type -> metacrypt.v2.GetCertResponse
-	10, // [10:22] is the sub-list for method input_type
+	19, // 35: metacrypt.v2.CAService.ListCerts:output_type -> metacrypt.v2.ListCertsResponse
-	10, // [10:10] is the sub-list for extension type_name
+	21, // 36: metacrypt.v2.CAService.RenewCert:output_type -> metacrypt.v2.RenewCertResponse
-	10, // [10:10] is the sub-list for extension extendee
+	23, // 37: metacrypt.v2.CAService.SignCSR:output_type -> metacrypt.v2.SignCSRResponse
-	0,  // [0:10] is the sub-list for field type_name
+	25, // 38: metacrypt.v2.CAService.RevokeCert:output_type -> metacrypt.v2.RevokeCertResponse
+	27, // 39: metacrypt.v2.CAService.DeleteCert:output_type -> metacrypt.v2.DeleteCertResponse
+	26, // [26:40] is the sub-list for method output_type
+	12, // [12:26] is the sub-list for method input_type
+	12, // [12:12] is the sub-list for extension type_name
+	12, // [12:12] is the sub-list for extension extendee
+	0,  // [0:12] is the sub-list for field type_name
 }
 
 func init() { file_proto_metacrypt_v2_ca_proto_init() }
@@ -1932,7 +2182,7 @@ func file_proto_metacrypt_v2_ca_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: unsafe.Slice(unsafe.StringData(file_proto_metacrypt_v2_ca_proto_rawDesc), len(file_proto_metacrypt_v2_ca_proto_rawDesc)),
 			NumEnums:      0,
-			NumMessages:   26,
+			NumMessages:   30,
 			NumExtensions: 0,
 			NumServices:   1,
 		},

gen/metacrypt/v2/ca_grpc.pb.go

@@ -31,6 +31,8 @@ const (
 	CAService_ListCerts_FullMethodName    = "/metacrypt.v2.CAService/ListCerts"
 	CAService_RenewCert_FullMethodName    = "/metacrypt.v2.CAService/RenewCert"
 	CAService_SignCSR_FullMethodName      = "/metacrypt.v2.CAService/SignCSR"
+	CAService_RevokeCert_FullMethodName   = "/metacrypt.v2.CAService/RevokeCert"
+	CAService_DeleteCert_FullMethodName   = "/metacrypt.v2.CAService/DeleteCert"
 )
 
 // CAServiceClient is the client API for CAService service.
@@ -40,8 +42,8 @@ const (
 // CAService provides typed, authenticated access to CA engine operations.
 // All RPCs require the service to be unsealed. Write operations (CreateIssuer,
 // DeleteIssuer, ImportRoot, IssueCert, RenewCert) require authentication.
-// Admin-only operations (CreateIssuer, DeleteIssuer, ImportRoot) additionally
+// Admin-only operations (CreateIssuer, DeleteIssuer, ImportRoot, RevokeCert,
-// require the caller to have admin privileges.
+// DeleteCert) additionally require the caller to have admin privileges.
 type CAServiceClient interface {
 	// ImportRoot imports an existing root CA certificate and private key.
 	// Admin only. Only allowed when no valid root exists.
@@ -72,6 +74,11 @@ type CAServiceClient interface {
 	// and SAN fields from the CSR are preserved exactly; profile defaults supply
 	// key usages and validity if not overridden. Auth required.
 	SignCSR(ctx context.Context, in *SignCSRRequest, opts ...grpc.CallOption) (*SignCSRResponse, error)
+	// RevokeCert marks a certificate as revoked by serial number. Admin only.
+	RevokeCert(ctx context.Context, in *RevokeCertRequest, opts ...grpc.CallOption) (*RevokeCertResponse, error)
+	// DeleteCert permanently removes a certificate record by serial number.
+	// Admin only.
+	DeleteCert(ctx context.Context, in *DeleteCertRequest, opts ...grpc.CallOption) (*DeleteCertResponse, error)
 }
 
 type cAServiceClient struct {
@@ -202,6 +209,26 @@ func (c *cAServiceClient) SignCSR(ctx context.Context, in *SignCSRRequest, opts
 	return out, nil
 }
 
+func (c *cAServiceClient) RevokeCert(ctx context.Context, in *RevokeCertRequest, opts ...grpc.CallOption) (*RevokeCertResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(RevokeCertResponse)
+	err := c.cc.Invoke(ctx, CAService_RevokeCert_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *cAServiceClient) DeleteCert(ctx context.Context, in *DeleteCertRequest, opts ...grpc.CallOption) (*DeleteCertResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(DeleteCertResponse)
+	err := c.cc.Invoke(ctx, CAService_DeleteCert_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // CAServiceServer is the server API for CAService service.
 // All implementations must embed UnimplementedCAServiceServer
 // for forward compatibility.
@@ -209,8 +236,8 @@ func (c *cAServiceClient) SignCSR(ctx context.Context, in *SignCSRRequest, opts
 // CAService provides typed, authenticated access to CA engine operations.
 // All RPCs require the service to be unsealed. Write operations (CreateIssuer,
 // DeleteIssuer, ImportRoot, IssueCert, RenewCert) require authentication.
-// Admin-only operations (CreateIssuer, DeleteIssuer, ImportRoot) additionally
+// Admin-only operations (CreateIssuer, DeleteIssuer, ImportRoot, RevokeCert,
-// require the caller to have admin privileges.
+// DeleteCert) additionally require the caller to have admin privileges.
 type CAServiceServer interface {
 	// ImportRoot imports an existing root CA certificate and private key.
 	// Admin only. Only allowed when no valid root exists.
@@ -241,6 +268,11 @@ type CAServiceServer interface {
 	// and SAN fields from the CSR are preserved exactly; profile defaults supply
 	// key usages and validity if not overridden. Auth required.
 	SignCSR(context.Context, *SignCSRRequest) (*SignCSRResponse, error)
+	// RevokeCert marks a certificate as revoked by serial number. Admin only.
+	RevokeCert(context.Context, *RevokeCertRequest) (*RevokeCertResponse, error)
+	// DeleteCert permanently removes a certificate record by serial number.
+	// Admin only.
+	DeleteCert(context.Context, *DeleteCertRequest) (*DeleteCertResponse, error)
 	mustEmbedUnimplementedCAServiceServer()
 }
 
@@ -287,6 +319,12 @@ func (UnimplementedCAServiceServer) RenewCert(context.Context, *RenewCertRequest
 func (UnimplementedCAServiceServer) SignCSR(context.Context, *SignCSRRequest) (*SignCSRResponse, error) {
 	return nil, status.Error(codes.Unimplemented, "method SignCSR not implemented")
 }
+func (UnimplementedCAServiceServer) RevokeCert(context.Context, *RevokeCertRequest) (*RevokeCertResponse, error) {
+	return nil, status.Error(codes.Unimplemented, "method RevokeCert not implemented")
+}
+func (UnimplementedCAServiceServer) DeleteCert(context.Context, *DeleteCertRequest) (*DeleteCertResponse, error) {
+	return nil, status.Error(codes.Unimplemented, "method DeleteCert not implemented")
+}
 func (UnimplementedCAServiceServer) mustEmbedUnimplementedCAServiceServer() {}
 func (UnimplementedCAServiceServer) testEmbeddedByValue()                   {}
 
@@ -524,6 +562,42 @@ func _CAService_SignCSR_Handler(srv interface{}, ctx context.Context, dec func(i
 	return interceptor(ctx, in, info, handler)
 }
 
+func _CAService_RevokeCert_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(RevokeCertRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(CAServiceServer).RevokeCert(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: CAService_RevokeCert_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(CAServiceServer).RevokeCert(ctx, req.(*RevokeCertRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _CAService_DeleteCert_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(DeleteCertRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(CAServiceServer).DeleteCert(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: CAService_DeleteCert_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(CAServiceServer).DeleteCert(ctx, req.(*DeleteCertRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 // CAService_ServiceDesc is the grpc.ServiceDesc for CAService service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -579,6 +653,14 @@ var CAService_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "SignCSR",
 			Handler:    _CAService_SignCSR_Handler,
 		},
+		{
+			MethodName: "RevokeCert",
+			Handler:    _CAService_RevokeCert_Handler,
+		},
+		{
+			MethodName: "DeleteCert",
+			Handler:    _CAService_DeleteCert_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "proto/metacrypt/v2/ca.proto",

internal/engine/ca/ca.go

@@ -304,6 +304,10 @@ func (e *CAEngine) HandleRequest(ctx context.Context, req *engine.Request) (*eng
 		return e.handleSignCSR(ctx, req)
 	case "import-root":
 		return e.handleImportRoot(ctx, req)
+	case "revoke-cert":
+		return e.handleRevokeCert(ctx, req)
+	case "delete-cert":
+		return e.handleDeleteCert(ctx, req)
 	default:
 		return nil, fmt.Errorf("ca: unknown operation: %s", req.Operation)
 	}
@@ -831,8 +835,7 @@ func (e *CAEngine) handleGetCert(ctx context.Context, req *engine.Request) (*eng
 		return nil, fmt.Errorf("ca: parse cert record: %w", err)
 	}
 
-	return &engine.Response{
+	data := map[string]interface{}{
-		Data: map[string]interface{}{
 		"serial":     record.Serial,
 		"issuer":     record.Issuer,
 		"cn":         record.CN,
@@ -842,8 +845,13 @@ func (e *CAEngine) handleGetCert(ctx context.Context, req *engine.Request) (*eng
 		"issued_by":  record.IssuedBy,
 		"issued_at":  record.IssuedAt.Format(time.RFC3339),
 		"expires_at": record.ExpiresAt.Format(time.RFC3339),
-		},
+		"revoked":    record.Revoked,
-	}, nil
+	}
+	if record.Revoked {
+		data["revoked_at"] = record.RevokedAt.Format(time.RFC3339)
+		data["revoked_by"] = record.RevokedBy
+	}
+	return &engine.Response{Data: data}, nil
 }
 
 func (e *CAEngine) handleListCerts(ctx context.Context, req *engine.Request) (*engine.Response, error) {
@@ -1119,6 +1127,99 @@ func (e *CAEngine) handleSignCSR(ctx context.Context, req *engine.Request) (*eng
 	}, nil
 }
 
+func (e *CAEngine) handleRevokeCert(ctx context.Context, req *engine.Request) (*engine.Response, error) {
+	if req.CallerInfo == nil {
+		return nil, ErrUnauthorized
+	}
+	if !req.CallerInfo.IsAdmin {
+		return nil, ErrForbidden
+	}
+
+	serial, _ := req.Data["serial"].(string)
+	if serial == "" {
+		serial = req.Path
+	}
+	if serial == "" {
+		return nil, fmt.Errorf("ca: serial is required")
+	}
+
+	e.mu.Lock()
+	defer e.mu.Unlock()
+
+	recordData, err := e.barrier.Get(ctx, e.mountPath+"certs/"+serial+".json")
+	if err != nil {
+		if errors.Is(err, barrier.ErrNotFound) {
+			return nil, ErrCertNotFound
+		}
+		return nil, fmt.Errorf("ca: load cert record: %w", err)
+	}
+
+	var record CertRecord
+	if err := json.Unmarshal(recordData, &record); err != nil {
+		return nil, fmt.Errorf("ca: parse cert record: %w", err)
+	}
+
+	if record.Revoked {
+		return nil, fmt.Errorf("ca: certificate is already revoked")
+	}
+
+	record.Revoked = true
+	record.RevokedAt = time.Now()
+	record.RevokedBy = req.CallerInfo.Username
+
+	updated, err := json.Marshal(&record)
+	if err != nil {
+		return nil, fmt.Errorf("ca: marshal cert record: %w", err)
+	}
+	if err := e.barrier.Put(ctx, e.mountPath+"certs/"+serial+".json", updated); err != nil {
+		return nil, fmt.Errorf("ca: store cert record: %w", err)
+	}
+
+	return &engine.Response{
+		Data: map[string]interface{}{
+			"serial":     serial,
+			"revoked_at": record.RevokedAt.Format(time.RFC3339),
+		},
+	}, nil
+}
+
+func (e *CAEngine) handleDeleteCert(ctx context.Context, req *engine.Request) (*engine.Response, error) {
+	if req.CallerInfo == nil {
+		return nil, ErrUnauthorized
+	}
+	if !req.CallerInfo.IsAdmin {
+		return nil, ErrForbidden
+	}
+
+	serial, _ := req.Data["serial"].(string)
+	if serial == "" {
+		serial = req.Path
+	}
+	if serial == "" {
+		return nil, fmt.Errorf("ca: serial is required")
+	}
+
+	e.mu.Lock()
+	defer e.mu.Unlock()
+
+	// Verify the record exists before deleting.
+	_, err := e.barrier.Get(ctx, e.mountPath+"certs/"+serial+".json")
+	if err != nil {
+		if errors.Is(err, barrier.ErrNotFound) {
+			return nil, ErrCertNotFound
+		}
+		return nil, fmt.Errorf("ca: load cert record: %w", err)
+	}
+
+	if err := e.barrier.Delete(ctx, e.mountPath+"certs/"+serial+".json"); err != nil {
+		return nil, fmt.Errorf("ca: delete cert record: %w", err)
+	}
+
+	return &engine.Response{
+		Data: map[string]interface{}{"ok": true},
+	}, nil
+}
+
 // --- Helpers ---
 
 func defaultCAConfig() *CAConfig {

internal/engine/ca/types.go

@@ -1,6 +1,8 @@
 package ca
 
-import "time"
+import (
+	"time"
+)
 
 // CAConfig is the CA engine configuration stored in the barrier.
 type CAConfig struct {
@@ -27,11 +29,14 @@ type IssuerConfig struct {
 type CertRecord struct {
 	IssuedAt  time.Time `json:"issued_at"`
 	ExpiresAt time.Time `json:"expires_at"`
+	RevokedAt time.Time `json:"revoked_at,omitempty"`
 	Serial    string    `json:"serial"`
 	Issuer    string    `json:"issuer"`
 	CN        string    `json:"cn"`
 	Profile   string    `json:"profile"`
 	CertPEM   string    `json:"cert_pem"`
 	IssuedBy  string    `json:"issued_by"`
+	RevokedBy string    `json:"revoked_by,omitempty"`
 	SANs      []string  `json:"sans,omitempty"`
+	Revoked   bool      `json:"revoked,omitempty"`
 }

internal/grpcserver/ca.go

@@ -420,6 +420,45 @@ func (cs *caServer) SignCSR(ctx context.Context, req *pb.SignCSRRequest) (*pb.Si
 	}, nil
 }
 
+func (cs *caServer) RevokeCert(ctx context.Context, req *pb.RevokeCertRequest) (*pb.RevokeCertResponse, error) {
+	if req.Mount == "" || req.Serial == "" {
+		return nil, status.Error(codes.InvalidArgument, "mount and serial are required")
+	}
+	resp, err := cs.caHandleRequest(ctx, req.Mount, "revoke-cert", &engine.Request{
+		Operation:  "revoke-cert",
+		CallerInfo: cs.callerInfo(ctx),
+		Data:       map[string]interface{}{"serial": req.Serial},
+	})
+	if err != nil {
+		return nil, err
+	}
+	serial, _ := resp.Data["serial"].(string)
+	var revokedAt *timestamppb.Timestamp
+	if s, ok := resp.Data["revoked_at"].(string); ok {
+		if t, err := time.Parse(time.RFC3339, s); err == nil {
+			revokedAt = timestamppb.New(t)
+		}
+	}
+	cs.s.logger.Info("audit: certificate revoked", "mount", req.Mount, "serial", serial, "username", callerUsername(ctx))
+	return &pb.RevokeCertResponse{Serial: serial, RevokedAt: revokedAt}, nil
+}
+
+func (cs *caServer) DeleteCert(ctx context.Context, req *pb.DeleteCertRequest) (*pb.DeleteCertResponse, error) {
+	if req.Mount == "" || req.Serial == "" {
+		return nil, status.Error(codes.InvalidArgument, "mount and serial are required")
+	}
+	_, err := cs.caHandleRequest(ctx, req.Mount, "delete-cert", &engine.Request{
+		Operation:  "delete-cert",
+		CallerInfo: cs.callerInfo(ctx),
+		Data:       map[string]interface{}{"serial": req.Serial},
+	})
+	if err != nil {
+		return nil, err
+	}
+	cs.s.logger.Info("audit: certificate deleted", "mount", req.Mount, "serial", req.Serial, "username", callerUsername(ctx))
+	return &pb.DeleteCertResponse{}, nil
+}
+
 // --- helpers ---
 
 func certRecordFromData(d map[string]interface{}) *pb.CertRecord {
@@ -429,8 +468,10 @@ func certRecordFromData(d map[string]interface{}) *pb.CertRecord {
 	profile, _ := d["profile"].(string)
 	issuedBy, _ := d["issued_by"].(string)
 	certPEM, _ := d["cert_pem"].(string)
+	revoked, _ := d["revoked"].(bool)
+	revokedBy, _ := d["revoked_by"].(string)
 	sans := toStringSliceFromInterface(d["sans"])
-	var issuedAt, expiresAt *timestamppb.Timestamp
+	var issuedAt, expiresAt, revokedAt *timestamppb.Timestamp
 	if s, ok := d["issued_at"].(string); ok {
 		if t, err := time.Parse(time.RFC3339, s); err == nil {
 			issuedAt = timestamppb.New(t)
@@ -441,6 +482,11 @@ func certRecordFromData(d map[string]interface{}) *pb.CertRecord {
 			expiresAt = timestamppb.New(t)
 		}
 	}
+	if s, ok := d["revoked_at"].(string); ok {
+		if t, err := time.Parse(time.RFC3339, s); err == nil {
+			revokedAt = timestamppb.New(t)
+		}
+	}
 	return &pb.CertRecord{
 		Serial:     serial,
 		Issuer:     issuer,
@@ -451,6 +497,9 @@ func certRecordFromData(d map[string]interface{}) *pb.CertRecord {
 		IssuedAt:   issuedAt,
 		ExpiresAt:  expiresAt,
 		CertPem:    []byte(certPEM),
+		Revoked:    revoked,
+		RevokedAt:  revokedAt,
+		RevokedBy:  revokedBy,
 	}
 }
 

internal/server/routes.go

@@ -34,6 +34,11 @@ func (s *Server) registerRoutes(r chi.Router) {
 	r.Post("/v1/engine/unmount", s.requireAdmin(s.handleEngineUnmount))
 	r.Post("/v1/engine/request", s.requireAuth(s.handleEngineRequest))
 
+	// CA certificate routes (auth required).
+	r.Get("/v1/ca/{mount}/cert/{serial}", s.requireAuth(s.handleGetCert))
+	r.Post("/v1/ca/{mount}/cert/{serial}/revoke", s.requireAdmin(s.handleRevokeCert))
+	r.Delete("/v1/ca/{mount}/cert/{serial}", s.requireAdmin(s.handleDeleteCert))
+
 	// Public PKI routes (no auth required, but must be unsealed).
 	r.Get("/v1/pki/{mount}/ca", s.requireUnseal(s.handlePKIRoot))
 	r.Get("/v1/pki/{mount}/ca/chain", s.requireUnseal(s.handlePKIChain))
@@ -370,6 +375,91 @@ func (s *Server) handlePolicyRule(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+// --- CA Certificate Handlers ---
+
+func (s *Server) handleGetCert(w http.ResponseWriter, r *http.Request) {
+	mountName := chi.URLParam(r, "mount")
+	serial := chi.URLParam(r, "serial")
+
+	info := TokenInfoFromContext(r.Context())
+	resp, err := s.engines.HandleRequest(r.Context(), mountName, &engine.Request{
+		Operation: "get-cert",
+		Data:      map[string]interface{}{"serial": serial},
+		CallerInfo: &engine.CallerInfo{
+			Username: info.Username,
+			Roles:    info.Roles,
+			IsAdmin:  info.IsAdmin,
+		},
+	})
+	if err != nil {
+		if errors.Is(err, ca.ErrCertNotFound) {
+			http.Error(w, `{"error":"certificate not found"}`, http.StatusNotFound)
+			return
+		}
+		http.Error(w, `{"error":"`+err.Error()+`"}`, http.StatusInternalServerError)
+		return
+	}
+	writeJSON(w, http.StatusOK, resp.Data)
+}
+
+func (s *Server) handleRevokeCert(w http.ResponseWriter, r *http.Request) {
+	mountName := chi.URLParam(r, "mount")
+	serial := chi.URLParam(r, "serial")
+
+	info := TokenInfoFromContext(r.Context())
+	resp, err := s.engines.HandleRequest(r.Context(), mountName, &engine.Request{
+		Operation: "revoke-cert",
+		Data:      map[string]interface{}{"serial": serial},
+		CallerInfo: &engine.CallerInfo{
+			Username: info.Username,
+			Roles:    info.Roles,
+			IsAdmin:  info.IsAdmin,
+		},
+	})
+	if err != nil {
+		if errors.Is(err, ca.ErrCertNotFound) {
+			http.Error(w, `{"error":"certificate not found"}`, http.StatusNotFound)
+			return
+		}
+		if errors.Is(err, ca.ErrForbidden) {
+			http.Error(w, `{"error":"forbidden"}`, http.StatusForbidden)
+			return
+		}
+		http.Error(w, `{"error":"`+err.Error()+`"}`, http.StatusInternalServerError)
+		return
+	}
+	writeJSON(w, http.StatusOK, resp.Data)
+}
+
+func (s *Server) handleDeleteCert(w http.ResponseWriter, r *http.Request) {
+	mountName := chi.URLParam(r, "mount")
+	serial := chi.URLParam(r, "serial")
+
+	info := TokenInfoFromContext(r.Context())
+	_, err := s.engines.HandleRequest(r.Context(), mountName, &engine.Request{
+		Operation: "delete-cert",
+		Data:      map[string]interface{}{"serial": serial},
+		CallerInfo: &engine.CallerInfo{
+			Username: info.Username,
+			Roles:    info.Roles,
+			IsAdmin:  info.IsAdmin,
+		},
+	})
+	if err != nil {
+		if errors.Is(err, ca.ErrCertNotFound) {
+			http.Error(w, `{"error":"certificate not found"}`, http.StatusNotFound)
+			return
+		}
+		if errors.Is(err, ca.ErrForbidden) {
+			http.Error(w, `{"error":"forbidden"}`, http.StatusForbidden)
+			return
+		}
+		http.Error(w, `{"error":"`+err.Error()+`"}`, http.StatusInternalServerError)
+		return
+	}
+	writeJSON(w, http.StatusNoContent, nil)
+}
+
 // --- Public PKI Handlers ---
 
 func (s *Server) handlePKIRoot(w http.ResponseWriter, r *http.Request) {

internal/webserver/cert_detail_test.go

@@ -98,6 +98,14 @@ func (m *mockVault) ListCerts(ctx context.Context, token, mount string) ([]CertS
 	return nil, nil
 }
 
+func (m *mockVault) RevokeCert(ctx context.Context, token, mount, serial string) error {
+	return nil
+}
+
+func (m *mockVault) DeleteCert(ctx context.Context, token, mount, serial string) error {
+	return nil
+}
+
 func (m *mockVault) Close() error { return nil }
 
 // newTestWebServer builds a WebServer wired to the given mock, suitable for unit tests.

internal/webserver/client.go

@@ -329,6 +329,9 @@ type CertDetail struct {
 	IssuedAt   string
 	ExpiresAt  string
 	CertPEM    string
+	Revoked    bool
+	RevokedAt  string
+	RevokedBy  string
 }
 
 // GetCert retrieves a full certificate record by serial number.
@@ -349,6 +352,8 @@ func (c *VaultClient) GetCert(ctx context.Context, token, mount, serial string)
 		Profile:    rec.Profile,
 		IssuedBy:   rec.IssuedBy,
 		CertPEM:    string(rec.CertPem),
+		Revoked:    rec.Revoked,
+		RevokedBy:  rec.RevokedBy,
 	}
 	if rec.IssuedAt != nil {
 		cd.IssuedAt = rec.IssuedAt.AsTime().Format("2006-01-02T15:04:05Z")
@@ -356,9 +361,24 @@ func (c *VaultClient) GetCert(ctx context.Context, token, mount, serial string)
 	if rec.ExpiresAt != nil {
 		cd.ExpiresAt = rec.ExpiresAt.AsTime().Format("2006-01-02T15:04:05Z")
 	}
+	if rec.RevokedAt != nil {
+		cd.RevokedAt = rec.RevokedAt.AsTime().Format("2006-01-02T15:04:05Z")
+	}
 	return cd, nil
 }
 
+// RevokeCert marks a certificate as revoked.
+func (c *VaultClient) RevokeCert(ctx context.Context, token, mount, serial string) error {
+	_, err := c.ca.RevokeCert(withToken(ctx, token), &pb.RevokeCertRequest{Mount: mount, Serial: serial})
+	return err
+}
+
+// DeleteCert permanently removes a certificate record.
+func (c *VaultClient) DeleteCert(ctx context.Context, token, mount, serial string) error {
+	_, err := c.ca.DeleteCert(withToken(ctx, token), &pb.DeleteCertRequest{Mount: mount, Serial: serial})
+	return err
+}
+
 // CertSummary holds lightweight certificate metadata for list views.
 type CertSummary struct {
 	Serial     string

internal/webserver/routes.go

@@ -43,6 +43,8 @@ func (ws *WebServer) registerRoutes(r chi.Router) {
 		r.Get("/issuer/{issuer}", ws.requireAuth(ws.handleIssuerDetail))
 		r.Get("/cert/{serial}", ws.requireAuth(ws.handleCertDetail))
 		r.Get("/cert/{serial}/download", ws.requireAuth(ws.handleCertDownload))
+		r.Post("/cert/{serial}/revoke", ws.requireAuth(ws.handleCertRevoke))
+		r.Post("/cert/{serial}/delete", ws.requireAuth(ws.handleCertDelete))
 		r.Get("/{issuer}", ws.requireAuth(ws.handlePKIIssuer))
 	})
 }
@@ -531,6 +533,11 @@ func (ws *WebServer) handleIssueCert(w http.ResponseWriter, r *http.Request) {
 	}
 
 	// Stream a tgz archive containing the private key (PKCS8) and certificate.
+	// Extend the write deadline before streaming so that slow gRPC backends
+	// don't consume the server WriteTimeout before we start writing.
+	rc := http.NewResponseController(w)
+	_ = rc.SetWriteDeadline(time.Now().Add(60 * time.Second))
+
 	filename := issuedCert.Serial + ".tgz"
 	w.Header().Set("Content-Type", "application/gzip")
 	w.Header().Set("Content-Disposition", "attachment; filename=\""+filename+"\"")
@@ -621,6 +628,70 @@ func (ws *WebServer) handleCertDownload(w http.ResponseWriter, r *http.Request)
 	_, _ = w.Write([]byte(cert.CertPEM))
 }
 
+func (ws *WebServer) handleCertRevoke(w http.ResponseWriter, r *http.Request) {
+	info := tokenInfoFromContext(r.Context())
+	if !info.IsAdmin {
+		http.Error(w, "forbidden", http.StatusForbidden)
+		return
+	}
+
+	token := extractCookie(r)
+	mountName, err := ws.findCAMount(r, token)
+	if err != nil {
+		http.Error(w, "no CA engine mounted", http.StatusNotFound)
+		return
+	}
+
+	serial := chi.URLParam(r, "serial")
+	if err := ws.vault.RevokeCert(r.Context(), token, mountName, serial); err != nil {
+		st, _ := status.FromError(err)
+		if st.Code() == codes.NotFound {
+			http.Error(w, "certificate not found", http.StatusNotFound)
+			return
+		}
+		http.Error(w, grpcMessage(err), http.StatusInternalServerError)
+		return
+	}
+
+	http.Redirect(w, r, "/pki/cert/"+serial, http.StatusSeeOther)
+}
+
+func (ws *WebServer) handleCertDelete(w http.ResponseWriter, r *http.Request) {
+	info := tokenInfoFromContext(r.Context())
+	if !info.IsAdmin {
+		http.Error(w, "forbidden", http.StatusForbidden)
+		return
+	}
+
+	token := extractCookie(r)
+	mountName, err := ws.findCAMount(r, token)
+	if err != nil {
+		http.Error(w, "no CA engine mounted", http.StatusNotFound)
+		return
+	}
+
+	serial := chi.URLParam(r, "serial")
+
+	// Fetch the cert to get the issuer for the redirect.
+	cert, certErr := ws.vault.GetCert(r.Context(), token, mountName, serial)
+
+	if err := ws.vault.DeleteCert(r.Context(), token, mountName, serial); err != nil {
+		st, _ := status.FromError(err)
+		if st.Code() == codes.NotFound {
+			http.Error(w, "certificate not found", http.StatusNotFound)
+			return
+		}
+		http.Error(w, grpcMessage(err), http.StatusInternalServerError)
+		return
+	}
+
+	if certErr == nil && cert != nil {
+		http.Redirect(w, r, "/pki/issuer/"+cert.Issuer, http.StatusSeeOther)
+		return
+	}
+	http.Redirect(w, r, "/pki", http.StatusSeeOther)
+}
+
 func (ws *WebServer) handleSignCSR(w http.ResponseWriter, r *http.Request) {
 	info := tokenInfoFromContext(r.Context())
 	token := extractCookie(r)

internal/webserver/server.go

@@ -37,6 +37,8 @@ type vaultBackend interface {
 	SignCSR(ctx context.Context, token string, req SignCSRRequest) (*SignedCert, error)
 	GetCert(ctx context.Context, token, mount, serial string) (*CertDetail, error)
 	ListCerts(ctx context.Context, token, mount string) ([]CertSummary, error)
+	RevokeCert(ctx context.Context, token, mount, serial string) error
+	DeleteCert(ctx context.Context, token, mount, serial string) error
 	Close() error
 }
 
@@ -98,6 +100,12 @@ func (lw *loggingResponseWriter) WriteHeader(code int) {
 	lw.ResponseWriter.WriteHeader(code)
 }
 
+// Unwrap returns the underlying ResponseWriter so that http.ResponseController
+// can reach it to set deadlines and perform other extended operations.
+func (lw *loggingResponseWriter) Unwrap() http.ResponseWriter {
+	return lw.ResponseWriter
+}
+
 // Start starts the web server. It blocks until the server is closed.
 func (ws *WebServer) Start() error {
 	r := chi.NewRouter()

proto/metacrypt/v2/ca.proto

@@ -9,8 +9,8 @@ option go_package = "git.wntrmute.dev/kyle/metacrypt/gen/metacrypt/v2;metacryptv
 // CAService provides typed, authenticated access to CA engine operations.
 // All RPCs require the service to be unsealed. Write operations (CreateIssuer,
 // DeleteIssuer, ImportRoot, IssueCert, RenewCert) require authentication.
-// Admin-only operations (CreateIssuer, DeleteIssuer, ImportRoot) additionally
+// Admin-only operations (CreateIssuer, DeleteIssuer, ImportRoot, RevokeCert,
-// require the caller to have admin privileges.
+// DeleteCert) additionally require the caller to have admin privileges.
 service CAService {
   // ImportRoot imports an existing root CA certificate and private key.
   // Admin only. Only allowed when no valid root exists.
@@ -52,6 +52,13 @@ service CAService {
   // and SAN fields from the CSR are preserved exactly; profile defaults supply
   // key usages and validity if not overridden. Auth required.
   rpc SignCSR(SignCSRRequest) returns (SignCSRResponse);
+
+  // RevokeCert marks a certificate as revoked by serial number. Admin only.
+  rpc RevokeCert(RevokeCertRequest) returns (RevokeCertResponse);
+
+  // DeleteCert permanently removes a certificate record by serial number.
+  // Admin only.
+  rpc DeleteCert(DeleteCertRequest) returns (DeleteCertResponse);
 }
 
 // --- ImportRoot ---
@@ -252,6 +259,27 @@ message SignCSRResponse {
 
 // --- Shared message types ---
 
+// --- RevokeCert ---
+
+message RevokeCertRequest {
+  string mount = 1;
+  string serial = 2;
+}
+
+message RevokeCertResponse {
+  string serial = 1;
+  google.protobuf.Timestamp revoked_at = 2;
+}
+
+// --- DeleteCert ---
+
+message DeleteCertRequest {
+  string mount = 1;
+  string serial = 2;
+}
+
+message DeleteCertResponse {}
+
 // CertRecord is the full certificate record including the PEM-encoded cert.
 message CertRecord {
   string serial = 1;
@@ -264,6 +292,12 @@ message CertRecord {
   google.protobuf.Timestamp expires_at = 8;
   // cert_pem is the PEM-encoded certificate.
   bytes cert_pem = 9;
+  // revoked indicates whether the certificate has been revoked.
+  bool revoked = 10;
+  // revoked_at is the time the certificate was revoked, if applicable.
+  google.protobuf.Timestamp revoked_at = 11;
+  // revoked_by is the username of the admin who revoked the certificate.
+  string revoked_by = 12;
 }
 
 // CertSummary is a lightweight certificate record without the PEM data,

web/templates/cert_detail.html

@@ -1,7 +1,7 @@
 {{define "title"}} - Certificate: {{.Cert.Serial}}{{end}}
 {{define "content"}}
 <div class="page-header">
-    <h2>Certificate: {{.Cert.CommonName}}</h2>
+    <h2>Certificate: {{.Cert.CommonName}}{{if .Cert.Revoked}} <span style="color:#c0392b;">[REVOKED]</span>{{end}}</h2>
     <div class="page-meta">
         <a href="/pki/issuer/{{.Cert.Issuer}}">&larr; Issuer: {{.Cert.Issuer}}</a>
         &ensp;&middot;&ensp;
@@ -23,6 +23,10 @@
             <tr><th>Issued By</th><td>{{.Cert.IssuedBy}}</td></tr>
             <tr><th>Issued At</th><td>{{.Cert.IssuedAt}}</td></tr>
             <tr><th>Expires At</th><td>{{.Cert.ExpiresAt}}</td></tr>
+            {{if .Cert.Revoked}}
+            <tr><th>Revoked At</th><td>{{.Cert.RevokedAt}}</td></tr>
+            <tr><th>Revoked By</th><td>{{.Cert.RevokedBy}}</td></tr>
+            {{end}}
         </tbody>
     </table>
 </div>
@@ -33,4 +37,22 @@
         <textarea rows="12" class="pem-input" readonly>{{.Cert.CertPEM}}</textarea>
     </div>
 </div>
+
+{{if .IsAdmin}}
+<div class="card">
+    <div class="card-title">Admin Actions</div>
+    <div style="display:flex;gap:1rem;flex-wrap:wrap;">
+        {{if not .Cert.Revoked}}
+        <form method="POST" action="/pki/cert/{{.Cert.Serial}}/revoke"
+              onsubmit="return confirm('Revoke certificate {{.Cert.Serial}}? This cannot be undone.');">
+            <button type="submit" class="btn btn-danger">Revoke Certificate</button>
+        </form>
+        {{end}}
+        <form method="POST" action="/pki/cert/{{.Cert.Serial}}/delete"
+              onsubmit="return confirm('Permanently delete certificate record {{.Cert.Serial}}? This cannot be undone.');">
+            <button type="submit" class="btn btn-danger">Delete Record</button>
+        </form>
+    </div>
+</div>
+{{end}}
 {{end}}