Imports
- github.com/letsencrypt/boulder/Godeps/_workspace/src/github.com/cloudflare/cfssl/crypto/pkcs7
- github.com/letsencrypt/boulder/Godeps/_workspace/src/github.com/cloudflare/cfssl/errors
- github.com/letsencrypt/boulder/Godeps/_workspace/src/github.com/cloudflare/cfssl/helpers/derhelpers
- github.com/letsencrypt/boulder/Godeps/_workspace/src/github.com/cloudflare/cfssl/log
- github.com/letsencrypt/boulder/Godeps/_workspace/src/golang.org/x/crypto/pkcs12