PKCS#11

This is a Go implementation of the PKCS#11 API. It wraps the library closely, but uses Go idiom were it makes sense. It has been tested with SoftHSM.

SoftHSM

• Make it use a custom configuration file export SOFTHSM_CONF=$PWD/softhsm.conf

• Then use softhsm to init it

    softhsm --init-token --slot 0 --label test --pin 1234
  

• Then use libsofthsm.so as the pkcs11 module:

        p := pkcs11.New("/usr/lib/softhsm/libsofthsm.so")

Examples

A skeleton program would look somewhat like this (yes, pkcs#11 is verbose):

    p := pkcs11.New("/usr/lib/softhsm/libsofthsm.so")
    err := p.Initialize()
    if err != nil {
        panic(err)
    }

    defer p.Destroy()
    defer p.Finalize()

    slots, err := p.GetSlotList(true)
    if err != nil {
        panic(err)
    }

    session, err := p.OpenSession(slots[0], pkcs11.CKF_SERIAL_SESSION|pkcs11.CKF_RW_SESSION)
    if err != nil {
        panic(err)
    }
    defer p.CloseSession(session)

    err = p.Login(session, pkcs11.CKU_USER, "1234")
    if err != nil {
        panic(err)
    }
    defer p.Logout(session)

    p.DigestInit(session, []*pkcs11.Mechanism{pkcs11.NewMechanism(pkcs11.CKM_SHA_1, nil)})
    hash, err := p.Digest(session, []byte("this is a string"))
    if err != nil {
        panic(err)
    }

    for _, d := range hash {
            fmt.Printf("%x", d)
    }
    fmt.Println()

Further examples are included in the tests.

To expose PKCS#11 keys using the crypto.Signer interface, please see github.com/thalesignite/crypto11.

TODO

• Fix/double check endian stuff, see types.go NewAttribute()
• Look at the memory copying in fast functions (sign, hash etc)