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# PKCS#11 [](https://travis-ci.org/miekg/pkcs11) [](http://godoc.org/github.com/miekg/pkcs11)
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:
~~~ go
p := pkcs11.New("/usr/lib/softhsm/libsofthsm.so")
~~~
## Examples
A skeleton program would look somewhat like this (yes, pkcs#11 is verbose):
~~~ go
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](https://golang.org/pkg/crypto/#Signer),
please see [github.com/thalesignite/crypto11](https://github.com/thalesignite/crypto11).
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