Crypt::AuthEnc::CCM - Authenticated encryption in CCM mode
use Crypt::AuthEnc::CCM qw(ccm_encrypt_authenticate ccm_decrypt_verify); my ($ciphertext, $tag) = ccm_encrypt_authenticate('AES', $key, $nonce, $header, $tag_len, $plaintext); #### send ($ciphertext, $tag, $nonce, $header) to other party my $plaintext = ccm_decrypt_verify('AES', $key, $nonce, $header, $ciphertext, $tag);
CCM is a encrypt+authenticate mode that is centered around using AES (or any 16-byte cipher) as aprimitive. Unlike EAX and OCB mode, it is only meant for packet mode where the length of the input is known in advance.
Nothing is exported by default.
You can export selected functions:
use Crypt::AuthEnc::CCM qw(ccm_encrypt_authenticate ccm_decrypt_verify);
my ($ciphertext, $tag) = ccm_encrypt_authenticate($cipher, $key, $nonce, $header, $tag_len, $plaintext); # $cipher .. 'AES' or name of any other cipher with 16-byte block len # $key ..... AES key of proper length (128/192/256bits) # $nonce ... unique nonce/salt (no need to keep it secret) # $header .. meta-data you want to send with the message but not have encrypted
my $plaintext = ccm_decrypt_verify($cipher, $key, $nonce, $header, $ciphertext, $tag); # on error returns undef
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.