SoftHSM2 Docker Image

Build and run the image

1. Build the image

   $ docker build --tag softhsm2:2.5.0 .
   

2. Run the image

   $ docker run -ti --rm softhsm2:2.5.0 sh -l
   

Test it

Run the following commands within a running container.

1. Initialise a new token

   $ softhsm2-util --init-token --slot 0 --label "My First Token"
   === SO PIN (4-255 characters) ===
   Please enter SO PIN: ****
   Please reenter SO PIN: ****
   === User PIN (4-255 characters) ===
   Please enter user PIN: ****
   Please reenter user PIN: ****
   The token has been initialized and is reassigned to slot 384541823
   

2. Test the module

   $ pkcs11-tool --module /usr/local/lib/softhsm/libsofthsm2.so -l -t
   Using slot 0 with a present token (0x16eba47f)
   Logging in to "My First Token".
   Please enter User PIN: 
   C_SeedRandom() and C_GenerateRandom():
     seems to be OK
   Digests:
     all 4 digest functions seem to work
     MD5: OK
     SHA-1: OK
   Signatures: not implemented
   Verify (currently only for RSA)
     No private key found for testing
   Unwrap: not implemented
   Decryption (currently only for RSA)
   No errors
   

3. Generate a new RSA keypair

   $ pkcs11-tool --module /usr/local/lib/softhsm/libsofthsm2.so -l --keypairgen --key-type rsa:2048 --id 100 --label mykey
   Using slot 0 with a present token (0x16eba47f)
   Logging in to "My First Token".
   Please enter User PIN: 
   Key pair generated:
   Private Key Object; RSA 
     label:      mykey
     ID:         0100
     Usage:      decrypt, sign, unwrap
   Public Key Object; RSA 2048 bits
     label:      mykey
     ID:         0100
     Usage:      encrypt, verify, wrap
   

4. Sign a file

   # create data to sign
   $ echo "Data to sign" > data.txt
   
   # apply signature
   $ pkcs11-tool --module /usr/local/lib/softhsm/libsofthsm2.so --id 100 -s -m RSA-PKCS --input-file data.txt --output-file data.sig
   Using slot 0 with a present token (0x16eba47f)
   Logging in to "My First Token".
   Please enter User PIN: 
   Using signature algorithm RSA-PKCS
   

5. Verify signature

   # extract pubkey
   $ pkcs11-tool --module /usr/local/lib/softhsm/libsofthsm2.so -r --id 100 --type pubkey > pubkey.der
   Using slot 0 with a present token (0x16eba47f)
   
   # convert pubkey to PEM
   $ openssl rsa -inform DER -outform PEM -in pubkey.der -pubin > pubkey.pem
   writing RSA key
   
   # verify signature
   $ openssl rsautl -verify -inkey pubkey.pem -in data.sig -pubin
   Data to sign
   

References

• SoftHSM