This is the API documentation for the Vault PKI secrets engine. For general information about the usage and operation of the PKI secrets engine, please see the PKI documentation.

This documentation assumes the PKI secrets engine is enabled at the /pki path in Vault. Since it is possible to enable secrets engines at any location, please update your API calls accordingly.

Table of Contents

• Read CA Certificate
• Read CA Certificate Chain
• Read Certificate
• List Certificates
• Submit CA Information
• Read CRL Configuration
• Set CRL Configuration
• Read URLs
• Set URLs
• Read CRL
• Rotate CRLs
• Generate Intermediate
• Set Signed Intermediate
• Generate Certificate
• Revoke Certificate
• Create/Update Role
• Read Role
• List Roles
• Delete Role
• Generate Root
• Delete Root
• Sign Intermediate
• Sign Self-Issued
• Sign Certificate
• Sign Verbatim
• Tidy

Read CA Certificate

This endpoint retrieves the CA certificate in raw DER-encoded form. This is a bare endpoint that does not return a standard Vault data structure and cannot be read by the Vault CLI; use /pki/cert for that. If /pem is added to the endpoint, the CA certificate is returned in PEM format.

This is an unauthenticated endpoint.

Sample Request

$ curl \
    http://127.0.0.1:8200/v1/pki/ca/pem

Sample Response

<binary DER-encoded certificate>

Read CA Certificate Chain

This endpoint retrieves the CA certificate chain, including the CA in PEM format. This is a bare endpoint that does not return a standard Vault data structure and cannot be read by the Vault CLI; use /pki/cert for that.

This is an unauthenticated endpoint.

Sample Request

$ curl \
    http://127.0.0.1:8200/v1/pki/ca_chain

Sample Response

<PEM-encoded certificate chain>

Read Certificate

This endpoint retrieves one of a selection of certificates. This endpoint returns the certificate in PEM formatting in the certificate key of the JSON object, which is a standard Vault response that is readable by the Vault CLI.

This is an unauthenticated endpoint.

Parameters

• serial (string: <required>) – Specifies the serial of the key to read. This is part of the request URL. Valid values for serial are:

  • <serial> for the certificate with the given serial number
  • ca for the CA certificate
  • crl for the current CRL
  • ca_chain for the CA trust chain or a serial number in either hyphen-separated or colon-separated octal format

Sample Request

$ curl \
    http://127.0.0.1:8200/v1/pki/cert/crl

Sample Response

{
  "data": {
    "certificate": "-----BEGIN CERTIFICATE-----\nMIIGmDCCBYCgAwIBAgIHBzEB3fTzhTANBgkqhkiG9w0BAQsFADCBjDELMAkGA1UE\n..."
  }
}

List Certificates

This endpoint returns a list of the current certificates by serial number only.

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request LIST \
    http://127.0.0.1:8200/v1/pki/certs

Sample Response

{
  "lease_id": "",
  "renewable": false,
  "lease_duration": 0,
  "data": {
    "keys": [
      "17:67:16:b0:b9:45:58:c0:3a:29:e3:cb:d6:98:33:7a:a6:3b:66:c1",
      "26:0f:76:93:73:cb:3f:a0:7a:ff:97:85:42:48:3a:aa:e5:96:03:21"
    ]
  },
  "wrap_info": null,
  "warnings": null,
  "auth": null
}

Submit CA Information

This endpoint allows submitting the CA information for the backend via a PEM file containing the CA certificate and its private key, concatenated.

May optionally append additional CA certificates. Useful when creating an intermediate CA to ensure a full chain is returned when signing or generating certificates.

Not needed if you are generating a self-signed root certificate, and not used if you have a signed intermediate CA certificate with a generated key (use the /pki/intermediate/set-signed endpoint for that). If you have already set a certificate and key, they will be overridden.

Parameters

• pem_bundle (string: <required>) – Specifies the key and certificate concatenated in PEM format.

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data "@payload.json" \
    http://127.0.0.1:8200/v1/pki/config/ca

Note that if you provide the data through the HTTP API it must be JSON-formatted, with newlines replaced with \n, like so:

{
  "pem_bundle": "-----BEGIN RSA PRIVATE KEY-----\n...\n-----END CERTIFICATE-----"
}

Read CRL Configuration

This endpoint allows getting the duration for which the generated CRL should be marked valid.

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    http://127.0.0.1:8200/v1/pki/config/crl

Sample Response

{
  "lease_id": "",
  "renewable": false,
  "lease_duration": 0,
  "data": {
    "disable": false,
    "expiry": "72h"
  },
  "auth": null
}

Set CRL Configuration

This endpoint allows setting the duration for which the generated CRL should be marked valid. If the CRL is disabled, it will return a signed but zero-length CRL for any request. If enabled, it will re-build the CRL.

Parameters

• expiry (string: "72h") – Specifies the time until expiration.
• disable (bool: false) – Disables or enables CRL building.

Sample Payload

{
  "expiry": "48h"
}

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/pki/config/crl

Read URLs

This endpoint fetches the URLs to be encoded in generated certificates.

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    http://127.0.0.1:8200/v1/pki/config/urls

Sample Response

{
  "lease_id": "",
  "renewable": false,
  "lease_duration": 0,
  "data": {
    "issuing_certificates": ["<url1>", "<url2>"],
    "crl_distribution_points": ["<url1>", "<url2>"],
    "ocsp_servers": ["<url1>", "<url2>"]
  },
  "auth": null
}

Set URLs

This endpoint allows setting the issuing certificate endpoints, CRL distribution points, and OCSP server endpoints that will be encoded into issued certificates. You can update any of the values at any time without affecting the other existing values. To remove the values, simply use a blank string as the parameter.

Parameters

• issuing_certificates (array<string>: nil) – Specifies the URL values for the Issuing Certificate field. This can be an array or a comma-separated string list.

• crl_distribution_points (array<string>: nil) – Specifies the URL values for the CRL Distribution Points field. This can be an array or a comma-separated string list.

• ocsp_servers (array<string>: nil) – Specifies the URL values for the OCSP Servers field. This can be an array or a comma-separated string list.

Sample Payload

{
  "ocsp_servers": ["https://..."]
}

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/pki/config/urls

Read CRL

This endpoint retrieves the current CRL in raw DER-encoded form. This endpoint is suitable for usage in the CRL Distribution Points extension in a CA certificate. This is a bare endpoint that does not return a standard Vault data structure and cannot be parsed by the Vault CLI; use /pki/cert/crl in that case. If /pem is added to the endpoint, the CRL is returned in PEM format.

This is an unauthenticated endpoint.

Sample Request

$ curl \
    http://127.0.0.1:8200/v1/pki/crl/pem

Sample Response

<binary DER-encoded CRL>

Rotate CRLs

This endpoint forces a rotation of the CRL. This can be used by administrators to cut the size of the CRL if it contains a number of certificates that have now expired, but has not been rotated due to no further certificates being revoked.

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    http://127.0.0.1:8200/v1/pki/crl/rotate

Sample Response

{
  "data": {
    "success": true
  }
}

Generate Intermediate

This endpoint generates a new private key and a CSR for signing. If using Vault as a root, and for many other CAs, the various parameters on the final certificate are set at signing time and may or may not honor the parameters set here. This will overwrite any previously existing CA private key.

This is mostly meant as a helper function, and not all possible parameters that can be set in a CSR are supported.

Parameters

• type (string: <required>) – Specifies the type of the intermediate to create. If exported, the private key will be returned in the response; if internal the private key will not be returned and cannot be retrieved later. This is part of the request URL.

• common_name (string: <required>) – Specifies the requested CN for the certificate.

• alt_names (string: "") – Specifies the requested Subject Alternative Names, in a comma-delimited list. These can be host names or email addresses; they will be parsed into their respective fields.

• ip_sans (string: "") – Specifies the requested IP Subject Alternative Names, in a comma-delimited list.

• uri_sans (string: "") – Specifies the requested URI Subject Alternative Names, in a comma-delimited list.

• other_sans (string: "") – Specifies custom OID/UTF8-string SANs. These must match values specified on the role in allowed_other_sans (see role creation for allowed_other_sans globbing rules). The format is the same as OpenSSL: <oid>;<type>:<value> where the only current valid type is UTF8. This can be a comma-delimited list or a JSON string slice.

• format (string: "pem") – Specifies the format for returned data. This can be pem, der, or pem_bundle; defaults to pem. If der, the output is base64 encoded. If pem_bundle, the csr field will contain the private key (if exported) and CSR, concatenated.

• private_key_format (string: "der") – Specifies the format for marshaling the private key. Defaults to der which will return either base64-encoded DER or PEM-encoded DER, depending on the value of format. The other option is pkcs8 which will return the key marshalled as PEM-encoded PKCS8.

• key_type (string: "rsa") – Specifies the desired key type; must be rsa or ec.

• key_bits (int: 2048) – Specifies the number of bits to use. This must be changed to a valid value if the key_type is ec, e.g., 224, 256, 384 or 521.

• exclude_cn_from_sans (bool: false) – If true, the given common_name will not be included in DNS or Email Subject Alternate Names (as appropriate). Useful if the CN is not a hostname or email address, but is instead some human-readable identifier.

• ou (string: "") – Specifies the OU (OrganizationalUnit) values in the subject field of the resulting CSR. This is a comma-separated string or JSON array.

• organization (string: "") – Specifies the O (Organization) values in the subject field of the resulting CSR. This is a comma-separated string or JSON array.

• country (string: "") – Specifies the C (Country) values in the subject field of the resulting CSR. This is a comma-separated string or JSON array.

• locality (string: "") – Specifies the L (Locality) values in the subject field of the resulting CSR. This is a comma-separated string or JSON array.

• province (string: "") – Specifies the ST (Province) values in the subject field of the resulting CSR. This is a comma-separated string or JSON array.

• street_address (string: "") – Specifies the Street Address values in the subject field of the resulting CSR. This is a comma-separated string or JSON array.

• postal_code (string: "") – Specifies the Postal Code values in the subject field of the resulting CSR. This is a comma-separated string or JSON array.

• serial_number (string: "") – Specifies the Serial Number, if any. Otherwise Vault will generate a random serial for you. If you want more than one, specify alternative names in the alt_names map using OID 2.5.4.5.

Sample Payload

{
  "common_name": "www.example.com"
}

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/pki/intermediate/generate/exported

{
  "lease_id": "",
  "renewable": false,
  "lease_duration": 21600,
  "data": {
    "csr": "-----BEGIN CERTIFICATE REQUEST-----\nMIIDzDCCAragAwIBAgIUOd0ukLcjH43TfTHFG9qE0FtlMVgwCwYJKoZIhvcNAQEL\n...\numkqeYeO30g1uYvDuWLXVA==\n-----END CERTIFICATE REQUEST-----\n",
    "private_key": "-----BEGIN RSA PRIVATE KEY-----\\nMIIEpAIBAAKCAQEAwsANtGz9gS3o5SwTSlOG1l-----END RSA PRIVATE KEY-----",
    "private_key_type": "rsa"
  },
  "warnings": null,
  "auth": null
}

Set Signed Intermediate

This endpoint allows submitting the signed CA certificate corresponding to a private key generated via /pki/intermediate/generate. The certificate should be submitted in PEM format; see the documentation for /pki/config/ca for some hints on submitting.

Parameters

• certificate (string: <required>) – Specifies the certificate in PEM format. May optionally append additional CA certificates to populate the whole chain, which will then enable returning the full chain from issue and sign operations.

Sample Payload

{
  "certificate": "-----BEGIN CERTIFICATE..."
}

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/pki/intermediate/set-signed

Generate Certificate

This endpoint generates a new set of credentials (private key and certificate) based on the role named in the endpoint. The issuing CA certificate is returned as well, so that only the root CA need be in a client's trust store.

The private key is not stored. If you do not save the private key, you will need to request a new certificate.

Parameters

• name (string: <required>) – Specifies the name of the role to create the certificate against. This is part of the request URL.

• common_name (string: <required>) – Specifies the requested CN for the certificate. If the CN is allowed by role policy, it will be issued.

• alt_names (string: "") – Specifies requested Subject Alternative Names, in a comma-delimited list. These can be host names or email addresses; they will be parsed into their respective fields. If any requested names do not match role policy, the entire request will be denied.

• ip_sans (string: "") – Specifies requested IP Subject Alternative Names, in a comma-delimited list. Only valid if the role allows IP SANs (which is the default).

• uri_sans (string: "") – Specifies the requested URI Subject Alternative Names, in a comma-delimited list.

• other_sans (string: "") – Specifies custom OID/UTF8-string SANs. These must match values specified on the role in allowed_other_sans (see role creation for allowed_other_sans globbing rules). The format is the same as OpenSSL: <oid>;<type>:<value> where the only current valid type is UTF8. This can be a comma-delimited list or a JSON string slice.

• ttl (string: "") – Specifies requested Time To Live. Cannot be greater than the role's max_ttl value. If not provided, the role's ttl value will be used. Note that the role values default to system values if not explicitly set.

• format (string: "") – Specifies the format for returned data. Can be pem, der, or pem_bundle; defaults to pem. If der, the output is base64 encoded. If pem_bundle, the certificate field will contain the private key and certificate, concatenated; if the issuing CA is not a Vault-derived self-signed root, this will be included as well.

• private_key_format (string: "") – Specifies the format for marshaling the private key. Defaults to der which will return either base64-encoded DER or PEM-encoded DER, depending on the value of format. The other option is pkcs8 which will return the key marshalled as PEM-encoded PKCS8.

• exclude_cn_from_sans (bool: false) – If true, the given common_name will not be included in DNS or Email Subject Alternate Names (as appropriate). Useful if the CN is not a hostname or email address, but is instead some human-readable identifier.

Sample Payload

{
  "common_name": "www.example.com"
}

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/pki/issue/my-role

Sample Response

{
  "lease_id": "pki/issue/test/7ad6cfa5-f04f-c62a-d477-f33210475d05",
  "renewable": false,
  "lease_duration": 21600,
  "data": {
    "certificate": "-----BEGIN CERTIFICATE-----\nMIIDzDCCAragAwIBAgIUOd0ukLcjH43TfTHFG9qE0FtlMVgwCwYJKoZIhvcNAQEL\n...\numkqeYeO30g1uYvDuWLXVA==\n-----END CERTIFICATE-----\n",
    "issuing_ca": "-----BEGIN CERTIFICATE-----\nMIIDUTCCAjmgAwIBAgIJAKM+z4MSfw2mMA0GCSqGSIb3DQEBCwUAMBsxGTAXBgNV\n...\nG/7g4koczXLoUM3OQXd5Aq2cs4SS1vODrYmgbioFsQ3eDHd1fg==\n-----END CERTIFICATE-----\n",
    "ca_chain": [
      "-----BEGIN CERTIFICATE-----\nMIIDUTCCAjmgAwIBAgIJAKM+z4MSfw2mMA0GCSqGSIb3DQEBCwUAMBsxGTAXBgNV\n...\nG/7g4koczXLoUM3OQXd5Aq2cs4SS1vODrYmgbioFsQ3eDHd1fg==\n-----END CERTIFICATE-----\n"
    ],
    "private_key": "-----BEGIN RSA PRIVATE KEY-----\nMIIEowIBAAKCAQEAnVHfwoKsUG1GDVyWB1AFroaKl2ImMBO8EnvGLRrmobIkQvh+\n...\nQN351pgTphi6nlCkGPzkDuwvtxSxiCWXQcaxrHAL7MiJpPzkIBq1\n-----END RSA PRIVATE KEY-----\n",
    "private_key_type": "rsa",
    "serial_number": "39:dd:2e:90:b7:23:1f:8d:d3:7d:31:c5:1b:da:84:d0:5b:65:31:58"
  },
  "warnings": "",
  "auth": null
}

Revoke Certificate

This endpoint revokes a certificate using its serial number. This is an alternative option to the standard method of revoking using Vault lease IDs. A successful revocation will rotate the CRL.

Parameters

• serial_number (string: <required>) – Specifies the serial number of the certificate to revoke, in hyphen-separated or colon-separated octal.

Sample Payload

{
  "serial_number": "39:dd:2e..."
}

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/pki/revoke

Sample Response

{
  "data": {
    "revocation_time": 1433269787
  }
}

Create/Update Role

This endpoint creates or updates the role definition. Note that the allowed_domains, allow_subdomains, allow_glob_domains, and allow_any_name attributes are additive; between them nearly and across multiple roles nearly any issuing policy can be accommodated. server_flag, client_flag, and code_signing_flag are additive as well. If a client requests a certificate that is not allowed by the CN policy in the role, the request is denied.

Parameters

• name (string: <required>) – Specifies the name of the role to create. This is part of the request URL.

• ttl (string: "") – Specifies the Time To Live value provided as a string duration with time suffix. Hour is the largest suffix. If not set, uses the system default value or the value of max_ttl, whichever is shorter.

• max_ttl (string: "") – Specifies the maximum Time To Live provided as a string duration with time suffix. Hour is the largest suffix. If not set, defaults to the system maximum lease TTL.

• allow_localhost (bool: true) – Specifies if clients can request certificates for localhost as one of the requested common names. This is useful for testing and to allow clients on a single host to talk securely.

• allowed_domains (list: []) – Specifies the domains of the role. This is used with the allow_bare_domains, allow_subdomains, and allow_glob_domains options to determine the type of matching between these domains and the values of common name, DNS-typed SAN entries, and Email-typed SAN entries. When allow_any_name is used, this attribute has no effect.

• allowed_domains_template (bool: false) – When set, allowed_domains may contain templates, as with ACL Path Templating.

• allow_bare_domains (bool: false) – Specifies if clients can request certificates matching the value of the actual domains themselves; e.g. if a configured domain set with allowed_domains is example.com, this allows clients to actually request a certificate containing the name example.com as one of the DNS values on the final certificate. In some scenarios, this can be considered a security risk. Note that when an allowed_domain field contains a potential wildcard character (for example, allowed_domains=*.example.com) and allow_bare_domains and allow_wildcard_certificates are both enabled, issuance of a wildcard certificate for *.example.com will be permitted.

• allow_subdomains (bool: false) – Specifies if clients can request certificates with CNs that are subdomains of the CNs allowed by the other role options. This includes wildcard subdomains. For example, an allowed_domains value of example.com with this option set to true will allow foo.example.com and bar.example.com as well as *.example.com. To restrict issuance of wildcards by this option, see allow_wildcard_certificates below. This option is redundant when using the allow_any_name option.

• allow_glob_domains (bool: false) - Allows names specified in allowed_domains to contain glob patterns (e.g. ftp*.example.com). Clients will be allowed to request certificates with names matching the glob patterns.

• allow_wildcard_certificates (bool: true) - Allows the issuance of certificates with RFC 6125 wildcards in the CN field. When set to false, this prevents wildcards from being issued even if they would've been allowed by an option above. We support the following four wildcard types:

  • *.example.com, a single wildcard as the entire left-most label,
  • foo*.example.com, a single suffixed wildcard in the left-most label,
  • *foo.example.com, a single prefixed wildcard in the left-most label, and
  • f*o.example.com, a single interior wildcard in the left-most label.

• allow_any_name (bool: false) – Specifies if clients can request any CN. Useful in some circumstances, but make sure you understand whether it is appropriate for your installation before enabling it. Note that both enforce_hostnames and allow_wildcard_certificates are still checked, which may introduce limitations on issuance with this option.

• enforce_hostnames (bool: true) – Specifies if only valid host names are allowed for CNs, DNS SANs, and the host part of email addresses.

• allow_ip_sans (bool: true) – Specifies if clients can request IP Subject Alternative Names. No authorization checking is performed except to verify that the given values are valid IP addresses.

• allowed_uri_sans (string: "") - Defines allowed URI Subject Alternative Names. No authorization checking is performed except to verify that the given values are valid URIs. This can be a comma-delimited list or a JSON string slice. Values can contain glob patterns (e.g. spiffe://hostname/*).

• allowed_other_sans (string: "") – Defines allowed custom OID/UTF8-string SANs. This can be a comma-delimited list or a JSON string slice, where each element has the same format as OpenSSL: <oid>;<type>:<value>, but the only valid type is UTF8 or UTF-8. The value part of an element may be a * to allow any value with that OID. Alternatively, specifying a single * will allow any other_sans input.

• server_flag (bool: true) – Specifies if certificates are flagged for server use.

• client_flag (bool: true) – Specifies if certificates are flagged for client use.

• code_signing_flag (bool: false) – Specifies if certificates are flagged for code signing use.

• email_protection_flag (bool: false) – Specifies if certificates are flagged for email protection use.

• key_type (string: "rsa") – Specifies the type of key to generate for generated private keys and the type of key expected for submitted CSRs. Currently, rsa and ec are supported, or when signing CSRs any can be specified to allow keys of either type and with any bit size (subject to > 1024 bits for RSA keys).

• key_bits (int: 2048) – Specifies the number of bits to use for the generated keys. This will need to be changed for ec keys, e.g., 224, 256, 384 or 521.

• key_usage (list: ["DigitalSignature", "KeyAgreement", "KeyEncipherment"]) – Specifies the allowed key usage constraint on issued certificates. Valid values can be found at https://golang.org/pkg/crypto/x509/#KeyUsage - simply drop the KeyUsage part of the value. Values are not case-sensitive. To specify no key usage constraints, set this to an empty list.

• ext_key_usage (list: []) – Specifies the allowed extended key usage constraint on issued certificates. Valid values can be found at https://golang.org/pkg/crypto/x509/#ExtKeyUsage - simply drop the ExtKeyUsage part of the value. Values are not case-sensitive. To specify no key usage constraints, set this to an empty list.

• ext_key_usage_oids (string: "") - A comma-separated string or list of extended key usage oids.

• use_csr_common_name (bool: true) – When used with the CSR signing endpoint, the common name in the CSR will be used instead of taken from the JSON data. This does not include any requested SANs in the CSR; use use_csr_sans for that.

• use_csr_sans (bool: true) – When used with the CSR signing endpoint, the subject alternate names in the CSR will be used instead of taken from the JSON data. This does not include the common name in the CSR; use use_csr_common_name for that.

• ou (string: "") – Specifies the OU (OrganizationalUnit) values in the subject field of issued certificates. This is a comma-separated string or JSON array.

• organization (string: "") – Specifies the O (Organization) values in the subject field of issued certificates. This is a comma-separated string or JSON array.

• country (string: "") – Specifies the C (Country) values in the subject field of issued certificates. This is a comma-separated string or JSON array.

• locality (string: "") – Specifies the L (Locality) values in the subject field of issued certificates. This is a comma-separated string or JSON array.

• province (string: "") – Specifies the ST (Province) values in the subject field of issued certificates. This is a comma-separated string or JSON array.

• street_address (string: "") – Specifies the Street Address values in the subject field of issued certificates. This is a comma-separated string or JSON array.

• postal_code (string: "") – Specifies the Postal Code values in the subject field of issued certificates. This is a comma-separated string or JSON array.

• serial_number (string: "") – Specifies the Serial Number, if any. Otherwise Vault will generate a random serial for you. If you want more than one, specify alternative names in the alt_names map using OID 2.5.4.5.

• generate_lease (bool: false) – Specifies if certificates issued/signed against this role will have Vault leases attached to them. Certificates can be added to the CRL by vault revoke <lease_id> when certificates are associated with leases. It can also be done using the pki/revoke endpoint. However, when lease generation is disabled, invoking pki/revoke would be the only way to add the certificates to the CRL.

• no_store (bool: false) – If set, certificates issued/signed against this role will not be stored in the storage backend. This can improve performance when issuing large numbers of certificates. However, certificates issued in this way cannot be enumerated or revoked, so this option is recommended only for certificates that are non-sensitive, or extremely short-lived. This option implies a value of false for generate_lease.

• require_cn (bool: true) - If set to false, makes the common_name field optional while generating a certificate.

• policy_identifiers (list: []) – A comma-separated string or list of policy OIDs.

• basic_constraints_valid_for_non_ca (bool: false) - Mark Basic Constraints valid when issuing non-CA certificates.

• not_before_duration (duration: "30s") – Specifies the duration by which to backdate the NotBefore property.

Sample Payload

{
  "allowed_domains": ["example.com"],
  "allow_subdomains": true
}

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/pki/roles/my-role

Read Role

This endpoint queries the role definition.

Parameters

• name (string: <required>) – Specifies the name of the role to read. This is part of the request URL.

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    http://127.0.0.1:8200/v1/pki/roles/my-role

Sample Response

{
  "data": {
    "allow_any_name": false,
    "allow_ip_sans": true,
    "allow_localhost": true,
    "allow_subdomains": false,
    "allowed_domains": ["example.com", "foobar.com"],
    "allowed_uri_sans": ["example.com", "spiffe://*"],
    "allowed_other_sans": [
      "1.3.6.1.4.1.311.20.2.3;utf8:devops@example.com",
      "1.3.6.1.4.1.311.20.2.4;UTF-8:*"
    ],
    "client_flag": true,
    "code_signing_flag": false,
    "key_bits": 2048,
    "key_type": "rsa",
    "ttl": "6h",
    "max_ttl": "12h",
    "server_flag": true
  }
}

List Roles

This endpoint returns a list of available roles. Only the role names are returned, not any values.

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request LIST \
    http://127.0.0.1:8200/v1/pki/roles

Sample Response

{
  "auth": null,
  "data": {
    "keys": ["dev", "prod"]
  },
  "lease_duration": 2764800,
  "lease_id": "",
  "renewable": false
}

Delete Role

This endpoint deletes the role definition. Deleting a role does not revoke certificates previously issued under this role.

Parameters

• name (string: <required>) – Specifies the name of the role to delete. This is part of the request URL.

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request DELETE \
    http://127.0.0.1:8200/v1/pki/roles/my-role

Generate Root

This endpoint generates a new self-signed CA certificate and private key. If the path ends with exported, the private key will be returned in the response; if it is internal the private key will not be returned and cannot be retrieved later. Distribution points use the values set via config/urls.

As with other issued certificates, Vault will automatically revoke the generated root at the end of its lease period; the CA certificate will sign its own CRL.

As of Vault 0.8.1, if a CA cert/key already exists, this function will not overwrite it; it must be deleted first. Previous versions of Vault would overwrite the existing cert/key with new values.

Parameters

• type (string: <required>) – Specifies the type of the root to create. If exported, the private key will be returned in the response; if internal the private key will not be returned and cannot be retrieved later. This is part of the request URL.

• common_name (string: <required>) – Specifies the requested CN for the certificate.

• alt_names (string: "") – Specifies the requested Subject Alternative Names, in a comma-delimited list. These can be host names or email addresses; they will be parsed into their respective fields.

• ip_sans (string: "") – Specifies the requested IP Subject Alternative Names, in a comma-delimited list.

• uri_sans (string: "") – Specifies the requested URI Subject Alternative Names, in a comma-delimited list.

• other_sans (string: "") – Specifies custom OID/UTF8-string SANs. These must match values specified on the role in allowed_other_sans (see role creation for allowed_other_sans globbing rules). The format is the same as OpenSSL: <oid>;<type>:<value> where the only current valid type is UTF8. This can be a comma-delimited list or a JSON string slice.

• ttl (string: "") – Specifies the requested Time To Live (after which the certificate will be expired). This cannot be larger than the engine's max (or, if not set, the system max).

• format (string: "pem") – Specifies the format for returned data. Can be pem, der, or pem_bundle. If der, the output is base64 encoded. If pem_bundle, the certificate field will contain the private key (if exported) and certificate, concatenated; if the issuing CA is not a Vault-derived self-signed root, this will be included as well.

• private_key_format (string: "") – Specifies the format for marshaling the private key. Defaults to der which will return either base64-encoded DER or PEM-encoded DER, depending on the value of format. The other option is pkcs8 which will return the key marshalled as PEM-encoded PKCS8.

• key_type (string: "rsa") – Specifies the desired key type; must be rsa or ec.

• key_bits (int: 2048) – Specifies the number of bits to use. This must be changed to a valid value if the key_type is ec, e.g., 224, 256, 384 or 521.

• max_path_length (int: -1) – Specifies the maximum path length to encode in the generated certificate. -1 means no limit. Unless the signing certificate has a maximum path length set, in which case the path length is set to one less than that of the signing certificate. A limit of 0 means a literal path length of zero.

• exclude_cn_from_sans (bool: false) – If set, the given common_name will not be included in DNS or Email Subject Alternate Names (as appropriate). Useful if the CN is not a hostname or email address, but is instead some human-readable identifier.

• permitted_dns_domains (string: "") – A comma separated string (or, string array) containing DNS domains for which certificates are allowed to be issued or signed by this CA certificate. Note that subdomains are allowed, as per RFC.

• ou (string: "") – Specifies the OU (OrganizationalUnit) values in the subject field of the resulting certificate. This is a comma-separated string or JSON array.

• organization (string: "") – Specifies the O (Organization) values in the subject field of the resulting certificate. This is a comma-separated string or JSON array.

• country (string: "") – Specifies the C (Country) values in the subject field of the resulting certificate. This is a comma-separated string or JSON array.

• locality (string: "") – Specifies the L (Locality) values in the subject field of the resulting certificate. This is a comma-separated string or JSON array.

• province (string: "") – Specifies the ST (Province) values in the subject field of the resulting certificate. This is a comma-separated string or JSON array.

• street_address (string: "") – Specifies the Street Address values in the subject field of the resulting certificate. This is a comma-separated string or JSON array.

• postal_code (string: "") – Specifies the Postal Code values in the subject field of the resulting certificate. This is a comma-separated string or JSON array.

• serial_number (string: "") – Specifies the Serial Number, if any. Otherwise Vault will generate a random serial for you. If you want more than one, specify alternative names in the alt_names map using OID 2.5.4.5.

Sample Payload

{
  "common_name": "example.com"
}

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/pki/root/generate/internal

Sample Response

{
  "lease_id": "",
  "lease_duration": 0,
  "renewable": false,
  "data": {
    "certificate": "-----BEGIN CERTIFICATE-----\nMIIDzDCCAragAwIBAgIUOd0ukLcjH43TfTHFG9qE0FtlMVgwCwYJKoZIhvcNAQEL\n...\numkqeYeO30g1uYvDuWLXVA==\n-----END CERTIFICATE-----\n",
    "issuing_ca": "-----BEGIN CERTIFICATE-----\nMIIDzDCCAragAwIBAgIUOd0ukLcjH43TfTHFG9qE0FtlMVgwCwYJKoZIhvcNAQEL\n...\numkqeYeO30g1uYvDuWLXVA==\n-----END CERTIFICATE-----\n",
    "serial_number": "39:dd:2e:90:b7:23:1f:8d:d3:7d:31:c5:1b:da:84:d0:5b:65:31:58"
  },
  "auth": null
}

Delete Root

This endpoint deletes the current CA key (the old CA certificate will still be accessible for reading until a new certificate/key is generated or uploaded). This endpoint requires sudo/root privileges.

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request DELETE \
    http://127.0.0.1:8200/v1/pki/root

Sign Intermediate

This endpoint uses the configured CA certificate to issue a certificate with appropriate values for acting as an intermediate CA. Distribution points use the values set via config/urls. Values set in the CSR are ignored unless use_csr_values is set to true, in which case the values from the CSR are used verbatim.

Parameters

• csr (string: <required>) – Specifies the PEM-encoded CSR.

• common_name (string: <required>) – Specifies the requested CN for the certificate.

• alt_names (string: "") – Specifies the requested Subject Alternative Names, in a comma-delimited list. These can be host names or email addresses; they will be parsed into their respective fields.

• ip_sans (string: "") – Specifies the requested IP Subject Alternative Names, in a comma-delimited list.

• uri_sans (string: "") – Specifies the requested URI Subject Alternative Names, in a comma-delimited list.

• other_sans (string: "") – Specifies custom OID/UTF8-string SANs. These must match values specified on the role in allowed_other_sans (see role creation for allowed_other_sans globbing rules). The format is the same as OpenSSL: <oid>;<type>:<value> where the only current valid type is UTF8. This can be a comma-delimited list or a JSON string slice.

• ttl (string: "") – Specifies the requested Time To Live (after which the certificate will be expired). This cannot be larger than the engine's max (or, if not set, the system max). However, this can be after the expiration of the signing CA.

• format (string: "pem") – Specifies the format for returned data. Can be pem, der, or pem_bundle. If der, the output is base64 encoded. If pem_bundle, the certificate field will contain the certificate and, if the issuing CA is not a Vault-derived self-signed root, it will be concatenated with the certificate.

• max_path_length (int: -1) – Specifies the maximum path length to encode in the generated certificate. -1, means no limit, unless the signing certificate has a maximum path length set, in which case the path length is set to one less than that of the signing certificate. A limit of 0 means a literal path length of zero.

• exclude_cn_from_sans (string: "") – Specifies the given common_name will not be included in DNS or Email Subject Alternate Names (as appropriate). Useful if the CN is not a hostname or email address, but is instead some human-readable identifier.

• use_csr_values (bool: false) – If set to true, then: 1) Subject information, including names and alternate names, will be preserved from the CSR rather than using the values provided in the other parameters to this path; 2) Any key usages (for instance, non-repudiation) requested in the CSR will be added to the basic set of key usages used for CA certs signed by this path; 3) Extensions requested in the CSR will be copied into the issued certificate.

• permitted_dns_domains (string: "") – A comma separated string (or, string array) containing DNS domains for which certificates are allowed to be issued or signed by this CA certificate. Supports subdomains via a . in front of the domain, as per RFC.

• ou (string: "") – Specifies the OU (OrganizationalUnit) values in the subject field of the resulting certificate. This is a comma-separated string or JSON array.

• organization (string: "") – Specifies the O (Organization) values in the subject field of the resulting certificate. This is a comma-separated string or JSON array.

• country (string: "") – Specifies the C (Country) values in the subject field of the resulting certificate. This is a comma-separated string or JSON array.

• locality (string: "") – Specifies the L (Locality) values in the subject field of the resulting certificate. This is a comma-separated string or JSON array.

• province (string: "") – Specifies the ST (Province) values in the subject field of the resulting certificate. This is a comma-separated string or JSON array.

• street_address (string: "") – Specifies the Street Address values in the subject field of the resulting certificate. This is a comma-separated string or JSON array.

• postal_code (string: "") – Specifies the Postal Code values in the subject field of the resulting certificate. This is a comma-separated string or JSON array.

• serial_number (string: "") – Specifies the Serial Number, if any. Otherwise Vault will generate a random serial for you. If you want more than one, specify alternative names in the alt_names map using OID 2.5.4.5.

Sample Payload

{
  "csr": "...",
  "common_name": "example.com"
}

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/pki/root/sign-intermediate

Sample Response

{
  "lease_id": "",
  "renewable": false,
  "lease_duration": 0,
  "data": {
    "certificate": "-----BEGIN CERTIFICATE-----\nMIIDzDCCAragAwIBAgIUOd0ukLcjH43TfTHFG9qE0FtlMVgwCwYJKoZIhvcNAQEL\n...\numkqeYeO30g1uYvDuWLXVA==\n-----END CERTIFICATE-----\n",
    "issuing_ca": "-----BEGIN CERTIFICATE-----\nMIIDUTCCAjmgAwIBAgIJAKM+z4MSfw2mMA0GCSqGSIb3DQEBCwUAMBsxGTAXBgNV\n...\nG/7g4koczXLoUM3OQXd5Aq2cs4SS1vODrYmgbioFsQ3eDHd1fg==\n-----END CERTIFICATE-----\n",
    "ca_chain": [
      "-----BEGIN CERTIFICATE-----\nMIIDUTCCAjmgAwIBAgIJAKM+z4MSfw2mMA0GCSqGSIb3DQEBCwUAMBsxGTAXBgNV\n...\nG/7g4koczXLoUM3OQXd5Aq2cs4SS1vODrYmgbioFsQ3eDHd1fg==\n-----END CERTIFICATE-----\n"
    ],
    "serial_number": "39:dd:2e:90:b7:23:1f:8d:d3:7d:31:c5:1b:da:84:d0:5b:65:31:58"
  },
  "auth": null
}

Sign Self-Issued

This endpoint uses the configured CA certificate to sign a self-issued certificate (which will usually be a self-signed certificate as well).

This is an extremely privileged endpoint. The given certificate will be signed as-is with only minimal validation performed (is it a CA cert, and is it actually self-issued). The only values that will be changed will be the authority key ID, the issuer DN, and, if set, any distribution points.

This is generally only needed for root certificate rolling in cases where you don't want/can't get access to a CSR (such as if it's a root stored in Vault where the key is not exposed). If you don't know whether you need this endpoint, you most likely should be using a different endpoint (such as sign-intermediate).

This endpoint requires sudo capability.

Parameters

• certificate (string: <required>) – Specifies the PEM-encoded self-issued certificate.

Sample Payload

{
  "certificate": "..."
}

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/pki/root/sign-self-issued

Sample Response

{
  "lease_id": "",
  "renewable": false,
  "lease_duration": 0,
  "data": {
    "certificate": "-----BEGIN CERTIFICATE-----\nMIIDzDCCAragAwIBAgIUOd0ukLcjH43TfTHFG9qE0FtlMVgwCwYJKoZIhvcNAQEL\n...\numkqeYeO30g1uYvDuWLXVA==\n-----END CERTIFICATE-----\n",
    "issuing_ca": "-----BEGIN CERTIFICATE-----\nMIIDUTCCAjmgAwIBAgIJAKM+z4MSfw2mMA0GCSqGSIb3DQEBCwUAMBsxGTAXBgNV\n...\nG/7g4koczXLoUM3OQXd5Aq2cs4SS1vODrYmgbioFsQ3eDHd1fg==\n-----END CERTIFICATE-----\n"
  },
  "auth": null
}

Sign Certificate

This endpoint signs a new certificate based upon the provided CSR and the supplied parameters, subject to the restrictions contained in the role named in the endpoint. The issuing CA certificate is returned as well, so that only the root CA need be in a client's trust store.

Parameters

• csr (string: <required>) – Specifies the PEM-encoded CSR.

• common_name (string: <required>) – Specifies the requested CN for the certificate. If the CN is allowed by role policy, it will be issued.

• alt_names (string: "") – Specifies the requested Subject Alternative Names, in a comma-delimited list. These can be host names or email addresses; they will be parsed into their respective fields. If any requested names do not match role policy, the entire request will be denied.

• other_sans (string: "") – Specifies custom OID/UTF8-string SANs. These must match values specified on the role in allowed_other_sans (see role creation for allowed_other_sans globbing rules). The format is the same as OpenSSL: <oid>;<type>:<value> where the only current valid type is UTF8. This can be a comma-delimited list or a JSON string slice.

• ip_sans (string: "") – Specifies the requested IP Subject Alternative Names, in a comma-delimited list. Only valid if the role allows IP SANs (which is the default).

• uri_sans (string: "") – Specifies the requested URI Subject Alternative Names, in a comma-delimited list. If any requested URIs do not match role policy, the entire request will be denied.

• ttl (string: "") – Specifies the requested Time To Live. Cannot be greater than the role's max_ttl value. If not provided, the role's ttl value will be used. Note that the role values default to system values if not explicitly set.

• format (string: "pem") – Specifies the format for returned data. Can be pem, der, or pem_bundle. If der, the output is base64 encoded. If pem_bundle, the certificate field will contain the certificate and, if the issuing CA is not a Vault-derived self-signed root, it will be concatenated with the certificate.

• exclude_cn_from_sans (bool: false) – If set, the given common_name will not be included in DNS or Email Subject Alternate Names (as appropriate). Useful if the CN is not a hostname or email address, but is instead some human-readable identifier.

Sample Payload

{
  "csr": "...",
  "common_name": "example.com"
}

Sample Response

{
  "lease_id": "pki/sign/test/7ad6cfa5-f04f-c62a-d477-f33210475d05",
  "renewable": false,
  "lease_duration": 21600,
  "data": {
    "certificate": "-----BEGIN CERTIFICATE-----\nMIIDzDCCAragAwIBAgIUOd0ukLcjH43TfTHFG9qE0FtlMVgwCwYJKoZIhvcNAQEL\n...\numkqeYeO30g1uYvDuWLXVA==\n-----END CERTIFICATE-----\n",
    "issuing_ca": "-----BEGIN CERTIFICATE-----\nMIIDUTCCAjmgAwIBAgIJAKM+z4MSfw2mMA0GCSqGSIb3DQEBCwUAMBsxGTAXBgNV\n...\nG/7g4koczXLoUM3OQXd5Aq2cs4SS1vODrYmgbioFsQ3eDHd1fg==\n-----END CERTIFICATE-----\n",
    "ca_chain": [
      "-----BEGIN CERTIFICATE-----\nMIIDUTCCAjmgAwIBAgIJAKM+z4MSfw2mMA0GCSqGSIb3DQEBCwUAMBsxGTAXBgNV\n...\nG/7g4koczXLoUM3OQXd5Aq2cs4SS1vODrYmgbioFsQ3eDHd1fg==\n-----END CERTIFICATE-----\n"
    ],
    "serial_number": "39:dd:2e:90:b7:23:1f:8d:d3:7d:31:c5:1b:da:84:d0:5b:65:31:58"
  },
  "auth": null
}

Sign Verbatim

This endpoint signs a new certificate based upon the provided CSR. Values are taken verbatim from the CSR; the only restriction is that this endpoint will refuse to issue an intermediate CA certificate (see the /pki/root/sign-intermediate endpoint for that functionality.)

This is a potentially dangerous endpoint and only highly trusted users should have access.

Parameters

• name (string: "") - Specifies a role. If set, the following parameters from the role will have effect: ttl, max_ttl, generate_lease, and no_store.

• csr (string: <required>) – Specifies the PEM-encoded CSR.

• key_usage (list: ["DigitalSignature", "KeyAgreement", "KeyEncipherment"]) – Specifies the allowed key usage constraint on issued certificates. Valid values can be found at https://golang.org/pkg/crypto/x509/#KeyUsage - simply drop the KeyUsage part of the value. Values are not case-sensitive. To specify no key usage constraints, set this to an empty list.

• ext_key_usage (list: []) – Specifies the allowed extended key usage constraint on issued certificates. Valid values can be found at https://golang.org/pkg/crypto/x509/#ExtKeyUsage - simply drop the ExtKeyUsage part of the value. Values are not case-sensitive. To specify no key usage constraints, set this to an empty list.

• ext_key_usage_oids (string: "") - A comma-separated string or list of extended key usage oids.

• ttl (string: "") – Specifies the requested Time To Live. Cannot be greater than the engine's max_ttl value. If not provided, the engine's ttl value will be used, which defaults to system values if not explicitly set.

• format (string: "pem") – Specifies the format for returned data. Can be pem, der, or pem_bundle. If der, the output is base64 encoded. If pem_bundle, the certificate field will contain the certificate and, if the issuing CA is not a Vault-derived self-signed root, it will be concatenated with the certificate.

Sample Payload

{
  "csr": "..."
}

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/pki/sign-verbatim

Sample Response

{
  "lease_id": "pki/sign-verbatim/7ad6cfa5-f04f-c62a-d477-f33210475d05",
  "renewable": false,
  "lease_duration": 21600,
  "data": {
    "certificate": "-----BEGIN CERTIFICATE-----\nMIIDzDCCAragAwIBAgIUOd0ukLcjH43TfTHFG9qE0FtlMVgwCwYJKoZIhvcNAQEL\n...\numkqeYeO30g1uYvDuWLXVA==\n-----END CERTIFICATE-----\n",
    "issuing_ca": "-----BEGIN CERTIFICATE-----\nMIIDUTCCAjmgAwIBAgIJAKM+z4MSfw2mMA0GCSqGSIb3DQEBCwUAMBsxGTAXBgNV\n...\nG/7g4koczXLoUM3OQXd5Aq2cs4SS1vODrYmgbioFsQ3eDHd1fg==\n-----END CERTIFICATE-----\n",
    "ca_chain": [
      "-----BEGIN CERTIFICATE-----\nMIIDUTCCAjmgAwIBAgIJAKM+z4MSfw2mMA0GCSqGSIb3DQEBCwUAMBsxGTAXBgNV\n...\nG/7g4koczXLoUM3OQXd5Aq2cs4SS1vODrYmgbioFsQ3eDHd1fg==\n-----END CERTIFICATE-----\n"
    ],
    "serial_number": "39:dd:2e:90:b7:23:1f:8d:d3:7d:31:c5:1b:da:84:d0:5b:65:31:58"
  },
  "auth": null
}

Tidy

This endpoint allows tidying up the storage backend and/or CRL by removing certificates that have expired and are past a certain buffer period beyond their expiration time.

Parameters

• tidy_cert_store (bool: false) Specifies whether to tidy up the certificate store.

• tidy_revoked_certs (bool: false) Set to true to remove all invalid and expired certificates from storage. A revoked storage entry is considered invalid if the entry is empty, or the value within the entry is empty. If a certificate is removed due to expiry, the entry will also be removed from the CRL, and the CRL will be rotated.

• safety_buffer (string: "") Specifies A duration (given as an integer number of seconds or a string; defaults to 72h) used as a safety buffer to ensure certificates are not expunged prematurely; as an example, this can keep certificates from being removed from the CRL that, due to clock skew, might still be considered valid on other hosts. For a certificate to be expunged, the time must be after the expiration time of the certificate (according to the local clock) plus the duration of safety_buffer.

Sample Payload

{
  "safety_buffer": "24h"
}

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/pki/tidy

Cluster Scalability

Most non-introspection operations in the PKI secrets engine require a write to storage, and so are forwarded to the cluster's active node for execution. This table outlines which operations can be executed on performance standbys and thus scale horizontally.

* Only if the corresponding role has no_store set to true and generate_lease set to false. If generate_lease is true the lease creation will be forwarded to the active node; if no_store is false the entire request will be forwarded to the active node.