Crypt::AuthEnc::ChaCha20Poly1305 - Authenticated encryption in ChaCha20Poly1305 mode
### OO interface use Crypt::AuthEnc::ChaCha20Poly1305; # encrypt and authenticate my $ae = Crypt::AuthEnc::ChaCha20Poly1305->new($key, $iv); $ae->adata_add('additional_authenticated_data1'); $ae->adata_add('additional_authenticated_data2'); $ct = $ae->encrypt_add('data1'); $ct = $ae->encrypt_add('data2'); $ct = $ae->encrypt_add('data3'); $tag = $ae->encrypt_done(); # decrypt and verify my $ae = Crypt::AuthEnc::ChaCha20Poly1305->new($key, $iv); $ae->adata_add('additional_authenticated_data1'); $ae->adata_add('additional_authenticated_data2'); $pt = $ae->decrypt_add('ciphertext1'); $pt = $ae->decrypt_add('ciphertext2'); $pt = $ae->decrypt_add('ciphertext3'); $tag = $ae->decrypt_done(); die "decrypt failed" unless $tag eq $expected_tag; #or my $result = $ae->decrypt_done($expected_tag) die "decrypt failed"; ### functional interface use Crypt::AuthEnc::ChaCha20Poly1305 qw(chacha20poly1305_encrypt_authenticate chacha20poly1305_decrypt_verify); my ($ciphertext, $tag) = chacha20poly1305_encrypt_authenticate($key, $iv, $adata, $plaintext); my $plaintext = chacha20poly1305_decrypt_verify($key, $iv, $adata, $ciphertext, $tag);
Provides encryption and authentication based on ChaCha20 + Poly1305 as defined in RFC 7539 - https://tools.ietf.org/html/rfc7539
Nothing is exported by default.
You can export selected functions:
use Crypt::AuthEnc::ChaCha20Poly1305 qw(chacha20poly1305_encrypt_authenticate chacha20poly1305_decrypt_verify);
my ($ciphertext, $tag) = chacha20poly1305_encrypt_authenticate($key, $iv, $adata, $plaintext); # $key ..... key of proper length (128 or 256 bits / 16 or 32 bytes) # $iv ...... initialization vector (64 or 96 bits / 8 or 12 bytes) # $adata ... additional authenticated data (optional)
my $plaintext = chacha20poly1305_decrypt_verify($key, $iv, $adata, $ciphertext, $tag); # on error returns undef
my $ae = Crypt::AuthEnc::ChaCha20Poly1305->new($key, $iv); # $key ..... encryption key of proper length (128 or 256 bits / 16 or 32 bytes) # $iv ...... initialization vector (64 or 96 bits / 8 or 12 bytes)
Add additional authenticated data. Can be called before the first encrypt_add or decrypt_add;
encrypt_add
decrypt_add
$ae->adata_add($aad_data); #can be called multiple times
$ciphertext = $ae->encrypt_add($data); #can be called multiple times
$tag = $ae->encrypt_done();
$plaintext = $ae->decrypt_add($ciphertext); #can be called multiple times
my $result = $ae->decrypt_done($tag); # returns 1 (success) or 0 (failure) #or my $tag = $ae->decrypt_done; # returns $tag value
my $ae_new = $ae->clone;
$ae->set_iv($iv);
$ae->set_iv_rfc7905($iv, $seqnum);
CryptX, Crypt::AuthEnc::GCM, Crypt::AuthEnc::CCM, Crypt::AuthEnc::EAX, Crypt::AuthEnc::OCB
https://tools.ietf.org/html/rfc7539
To install CryptX, copy and paste the appropriate command in to your terminal.
cpanm
cpanm CryptX
CPAN shell
perl -MCPAN -e shell install CryptX
For more information on module installation, please visit the detailed CPAN module installation guide.