Publickey

class chepy.modules.publickey.Publickey(*data)

der_hex_to_pem() → PublickeyT

Convert DER format to PEM cert.

Converts a hexadecimal DER (Distinguished Encoding Rules) string into PEM (Privacy Enhanced Mail) format.

Returns

The Chepy object.

Return type

Chepy

Examples

>>> c = Chepy(str(Path().absolute() / "tests/files/test.der"))
>>> c.load_file()
>>> c.der_hex_to_pem()
>>> c.o.decode()
-----BEGIN CERTIFICATE-----
MIICeTCCAeICCQDi5dgCpKMeHTANBgkqhkiG9w0BAQsFADCBgDELMAkGA1UEBhMC
VVMxDDAKBgNVBAgMA2xvbDEMMAoGA1UEBwwDbnljMRIwEAYDVQQKDAlzZWN1cmlz
...
wQSFm54UNQ/vjM12yZ+C5c3268Vo8jSP7mI5R3wn6XztjUSXkDg5/3IL3kojti/h
nyhBHx2QCVke7BxWw3HWkbZ/1BKl0HnCGyd5HDTuOtlBmTS+QrJoNpdsn0zq4fvc
igbV1IJdKTBAiZzaOQ==
-----END CERTIFICATE-----

dump_pkcs12_cert(password: str) → PublickeyT

Get the private key and cert from pkcs12 cert

Parameters

password (str) – Password for certificate

Returns

The Chepy object.

Return type

Chepy

generate_ecc_keypair(curve: Literal['p256', 'p384', 'p521'] = 'p256', format: Literal['PEM', 'DER'] = 'PEM') → PublickeyT

Generate RSA key pair

Parameters

• curve (Literal[, optional) – Curve for keys. Defaults to p256.

• format (Literal[, optional) – Output format type. Defaults to ‘PEM’.

Returns

The Chepy object.

Return type

Chepy

generate_rsa_keypair(bits: int = 1024, format: Literal['PEM', 'DER'] = 'PEM', passphrase: str = None) → PublickeyT

Generate RSA key pair

Parameters

• bits (int, optional) – Length of keys. Defaults to 1024.

• format (Literal[, optional) – Output format type. Defaults to ‘PEM’.

• passphrase (str, optional) – Passphrase for keys. Defaults to None.

Returns

The Chepy object.

Return type

Chepy

parse_private_pem() → PublickeyT

Parse private key PEM

Returns

The Chepy object.

Return type

Chepy

parse_public_pem() → PublickeyT

Parse pubkey PEM to get n and e

Returns

The Chepy object.

Return type

Chepy

Examples

>>> Chepy("tests/files/public.pem").load_file().parse_public_pem().get_by_key("e").o
65537

parse_x509_der_hex() → PublickeyT

Parse X509 cert in DER format

X.509 is an ITU-T standard for a public key infrastructure (PKI) and Privilege Management Infrastructure (PMI). It is commonly involved with SSL/TLS security.<br><br>This operation displays the contents of a certificate in a human readable format, similar to the openssl command line tool.

Returns

A Chepy object.

Return type

Chepy

parse_x509_pem() → PublickeyT

Parse X509 cert in PEM format

X.509 is an ITU-T standard for a public key infrastructure (PKI) and Privilege Management Infrastructure (PMI). It is commonly involved with SSL/TLS security. This operation displays the contents of a certificate in a human readable format, similar to the openssl command line tool.

Returns

A Chepy object.

Return type

Chepy

Examples

>>> Chepy(path).load_file().parse_x509_pem().o
{
    "version": 0,
    ...
    "after": b"20201101152508Z",
    "issuer": {
        "C": "US",
        ...
        "email": "none@email.com",
    },
    "subject": {
        "C": "US",
        ...
        "email": "none@email.com",
    },
    "pubkey": {"bits": 1024},
}

pem_to_der_hex() → PublickeyT

Convert PEM cert to DER format

Converts PEM (Privacy Enhanced Mail) format to a hexadecimal DER (Distinguished Encoding Rules) string.

Returns

The Chepy object.

Return type

Chepy

public_from_x509() → PublickeyT

Get public key from x509 certificate

Returns

The Chepy object.

Return type

Chepy