The request "pkcs8" names a key format rather than a product, and none of the candidates documents PKCS#8 handling directly. Cryptography 8 provides high-level and low-level cryptographic interfaces and is the most relevant library for reading and writing PKCS#8 keys, while pyOpenSSL 6 wraps OpenSSL and PyCrypto 3 is unmaintained and should be avoided.

1. 1

   Cryptographycryptography.iowebsite read, tools not yet checked

   Provides high-level recipes and low-level interfaces to common cryptographic algorithms, which is the general toolkit for working with key material such as PKCS#8 keys.

   WebsiteDocs

   +4 community tools built for it

2. 2

   pyOpenSSLpyopenssl.orgwebsite read, tools not yet checked

   Is a thin wrapper around a subset of the OpenSSL library, so its methods call the corresponding OpenSSL functions that handle key and certificate formats.

   WebsiteDocs

3. 3

   PyCryptopycrypto.orgretired

   Its page states it is unmaintained, obsolete and contains security vulnerabilities, and recommends choosing an alternative, so it should not be used for PKCS#8 work.

   WebsiteDocs