Re-design of the original gocryptfs code to work as a library.
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// +build !without_openssl
package stupidgcm
import (
"crypto/cipher"
"log"
"golang.org/x/crypto/chacha20poly1305"
)
/*
#include <openssl/evp.h>
*/
import "C"
type stupidChacha20poly1305 struct {
stupidAEADCommon
}
// Verify that we satisfy the cipher.AEAD interface
var _ cipher.AEAD = &stupidChacha20poly1305{}
func NewChacha20poly1305(key []byte) *stupidChacha20poly1305 {
if len(key) != chacha20poly1305.KeySize {
log.Panicf("Only %d-byte keys are supported, you passed %d bytes", chacha20poly1305.KeySize, len(key))
}
return &stupidChacha20poly1305{
stupidAEADCommon{
key: append([]byte{}, key...), // private copy
openSSLEVPCipher: C.EVP_chacha20_poly1305(),
nonceSize: chacha20poly1305.NonceSize,
},
}
}