277 lines
7.1 KiB
Go
277 lines
7.1 KiB
Go
package pki
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import (
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"context"
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"encoding/pem"
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"fmt"
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"strings"
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"github.com/hashicorp/vault/sdk/framework"
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"github.com/hashicorp/vault/sdk/helper/errutil"
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"github.com/hashicorp/vault/sdk/logical"
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)
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// Returns the CA in raw format
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func pathFetchCA(b *backend) *framework.Path {
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return &framework.Path{
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Pattern: `ca(/pem)?`,
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.ReadOperation: b.pathFetchRead,
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},
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HelpSynopsis: pathFetchHelpSyn,
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HelpDescription: pathFetchHelpDesc,
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}
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}
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// Returns the CA chain
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func pathFetchCAChain(b *backend) *framework.Path {
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return &framework.Path{
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Pattern: `(cert/)?ca_chain`,
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.ReadOperation: b.pathFetchRead,
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},
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HelpSynopsis: pathFetchHelpSyn,
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HelpDescription: pathFetchHelpDesc,
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}
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}
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// Returns the CRL in raw format
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func pathFetchCRL(b *backend) *framework.Path {
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return &framework.Path{
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Pattern: `crl(/pem)?`,
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.ReadOperation: b.pathFetchRead,
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},
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HelpSynopsis: pathFetchHelpSyn,
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HelpDescription: pathFetchHelpDesc,
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}
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}
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// Returns any valid (non-revoked) cert. Since "ca" fits the pattern, this path
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// also handles returning the CA cert in a non-raw format.
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func pathFetchValid(b *backend) *framework.Path {
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return &framework.Path{
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Pattern: `cert/(?P<serial>[0-9A-Fa-f-:]+)`,
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Fields: map[string]*framework.FieldSchema{
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"serial": &framework.FieldSchema{
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Type: framework.TypeString,
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Description: `Certificate serial number, in colon- or
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hyphen-separated octal`,
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},
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},
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.ReadOperation: b.pathFetchRead,
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},
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HelpSynopsis: pathFetchHelpSyn,
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HelpDescription: pathFetchHelpDesc,
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}
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}
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// This returns the CRL in a non-raw format
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func pathFetchCRLViaCertPath(b *backend) *framework.Path {
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return &framework.Path{
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Pattern: `cert/crl`,
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.ReadOperation: b.pathFetchRead,
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},
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HelpSynopsis: pathFetchHelpSyn,
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HelpDescription: pathFetchHelpDesc,
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}
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}
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// This returns the list of serial numbers for certs
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func pathFetchListCerts(b *backend) *framework.Path {
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return &framework.Path{
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Pattern: "certs/?$",
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.ListOperation: b.pathFetchCertList,
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},
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HelpSynopsis: pathFetchHelpSyn,
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HelpDescription: pathFetchHelpDesc,
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}
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}
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func (b *backend) pathFetchCertList(ctx context.Context, req *logical.Request, data *framework.FieldData) (response *logical.Response, retErr error) {
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entries, err := req.Storage.List(ctx, "certs/")
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if err != nil {
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return nil, err
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}
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return logical.ListResponse(entries), nil
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}
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func (b *backend) pathFetchRead(ctx context.Context, req *logical.Request, data *framework.FieldData) (response *logical.Response, retErr error) {
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var serial, pemType, contentType string
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var certEntry, revokedEntry *logical.StorageEntry
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var funcErr error
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var certificate []byte
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var revocationTime int64
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response = &logical.Response{
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Data: map[string]interface{}{},
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}
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// Some of these need to return raw and some non-raw;
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// this is basically handled by setting contentType or not.
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// Errors don't cause an immediate exit, because the raw
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// paths still need to return raw output.
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switch {
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case req.Path == "ca" || req.Path == "ca/pem":
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serial = "ca"
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contentType = "application/pkix-cert"
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if req.Path == "ca/pem" {
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pemType = "CERTIFICATE"
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}
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case req.Path == "ca_chain" || req.Path == "cert/ca_chain":
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serial = "ca_chain"
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if req.Path == "ca_chain" {
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contentType = "application/pkix-cert"
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}
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case req.Path == "crl" || req.Path == "crl/pem":
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serial = "crl"
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contentType = "application/pkix-crl"
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if req.Path == "crl/pem" {
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pemType = "X509 CRL"
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}
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case req.Path == "cert/crl":
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serial = "crl"
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pemType = "X509 CRL"
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default:
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serial = data.Get("serial").(string)
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pemType = "CERTIFICATE"
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}
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if len(serial) == 0 {
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response = logical.ErrorResponse("The serial number must be provided")
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goto reply
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}
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if serial == "ca_chain" {
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caInfo, err := fetchCAInfo(ctx, req)
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switch err.(type) {
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case errutil.UserError:
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response = logical.ErrorResponse(err.Error())
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goto reply
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case errutil.InternalError:
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retErr = err
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goto reply
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}
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caChain := caInfo.GetCAChain()
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var certStr string
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for _, ca := range caChain {
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block := pem.Block{
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Type: "CERTIFICATE",
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Bytes: ca.Bytes,
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}
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certStr = strings.Join([]string{certStr, strings.TrimSpace(string(pem.EncodeToMemory(&block)))}, "\n")
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}
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certificate = []byte(strings.TrimSpace(certStr))
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goto reply
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}
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certEntry, funcErr = fetchCertBySerial(ctx, req, req.Path, serial)
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if funcErr != nil {
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switch funcErr.(type) {
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case errutil.UserError:
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response = logical.ErrorResponse(funcErr.Error())
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goto reply
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case errutil.InternalError:
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retErr = funcErr
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goto reply
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}
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}
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if certEntry == nil {
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response = nil
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goto reply
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}
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certificate = certEntry.Value
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if len(pemType) != 0 {
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block := pem.Block{
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Type: pemType,
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Bytes: certEntry.Value,
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}
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// This is convoluted on purpose to ensure that we don't have trailing
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// newlines via various paths
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certificate = []byte(strings.TrimSpace(string(pem.EncodeToMemory(&block))))
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}
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revokedEntry, funcErr = fetchCertBySerial(ctx, req, "revoked/", serial)
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if funcErr != nil {
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switch funcErr.(type) {
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case errutil.UserError:
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response = logical.ErrorResponse(funcErr.Error())
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goto reply
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case errutil.InternalError:
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retErr = funcErr
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goto reply
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}
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}
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if revokedEntry != nil {
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var revInfo revocationInfo
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err := revokedEntry.DecodeJSON(&revInfo)
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if err != nil {
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return logical.ErrorResponse(fmt.Sprintf("Error decoding revocation entry for serial %s: %s", serial, err)), nil
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}
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revocationTime = revInfo.RevocationTime
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}
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reply:
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switch {
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case len(contentType) != 0:
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response = &logical.Response{
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Data: map[string]interface{}{
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logical.HTTPContentType: contentType,
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logical.HTTPRawBody: certificate,
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}}
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if retErr != nil {
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if b.Logger().IsWarn() {
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b.Logger().Warn("possible error, but cannot return in raw response. Note that an empty CA probably means none was configured, and an empty CRL is possibly correct", "error", retErr)
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}
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}
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retErr = nil
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if len(certificate) > 0 {
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response.Data[logical.HTTPStatusCode] = 200
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} else {
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response.Data[logical.HTTPStatusCode] = 204
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}
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case retErr != nil:
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response = nil
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return
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case response == nil:
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return
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case response.IsError():
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return response, nil
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default:
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response.Data["certificate"] = string(certificate)
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response.Data["revocation_time"] = revocationTime
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}
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return
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}
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const pathFetchHelpSyn = `
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Fetch a CA, CRL, CA Chain, or non-revoked certificate.
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`
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const pathFetchHelpDesc = `
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This allows certificates to be fetched. If using the fetch/ prefix any non-revoked certificate can be fetched.
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Using "ca" or "crl" as the value fetches the appropriate information in DER encoding. Add "/pem" to either to get PEM encoding.
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Using "ca_chain" as the value fetches the certificate authority trust chain in PEM encoding.
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`
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