# Interface PeerCertificate

#### Hierarchy

- PeerCertificate
  - DetailedPeerCertificate

#####
Index

### Properties

asn1Curve?
bits?
ca
exponent?
ext_key_usage?
fingerprint
fingerprint256
fingerprint512
infoAccess?
issuer
modulus?
nistCurve?
pubkey?
raw
serialNumber
subject
subjectaltname?
valid_from
valid_to

## Properties

### `Optional` asn1Curve

asn1Curve?: string

The ASN.1 name of the OID of the elliptic curve. Well-known curves are identified by an OID. While it is unusual, it is possible that the curve is identified by its mathematical properties, in which case it will not have an OID.

### `Optional` bits

bits?: number

For RSA keys: The RSA bit size.

For EC keys: The key size in bits.

### ca

ca: boolean

`true` if a Certificate Authority (CA), `false` otherwise.

#### Since

v18.13.0

### `Optional` exponent

exponent?: string

The RSA exponent, as a string in hexadecimal number notation.

### `Optional` ext_key_usage

ext_key_usage?: string[]

The extended key usage, a set of OIDs.

### fingerprint

fingerprint: string

The SHA-1 digest of the DER encoded certificate. It is returned as a `:` separated hexadecimal string.

### fingerprint256

fingerprint256: string

The SHA-256 digest of the DER encoded certificate. It is returned as a `:` separated hexadecimal string.

### fingerprint512

fingerprint512: string

The SHA-512 digest of the DER encoded certificate. It is returned as a `:` separated hexadecimal string.

### `Optional` infoAccess

infoAccess?: Dict<string[]>

An array describing the AuthorityInfoAccess, used with OCSP.

### issuer

issuer: Certificate

The certificate issuer, described in the same terms as the `subject`.

### `Optional` modulus

modulus?: string

The RSA modulus, as a hexadecimal string.

### `Optional` nistCurve

nistCurve?: string

The NIST name for the elliptic curve,if it has one (not all well-known curves have been assigned names by NIST).

### `Optional` pubkey

pubkey?: Buffer

The public key.

### raw

raw: Buffer

The DER encoded X.509 certificate data.

### serialNumber

serialNumber: string

The certificate serial number, as a hex string.

### subject

subject: Certificate

The certificate subject.

### `Optional` subjectaltname

subjectaltname?: string

A string containing concatenated names for the subject, an alternative to the `subject` names.

### valid_from

valid_from: string

The date-time the certificate is valid from.

### valid_to

valid_to: string

The date-time the certificate is valid to.

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