{
    "mode": "perldoc",
    "parameter": "Crypt::Mac::BLAKE2b",
    "section": "",
    "url": "https://www.chedong.com/phpMan.php/perldoc/Crypt%3A%3AMac%3A%3ABLAKE2b/json",
    "generated": "2026-06-09T13:45:24Z",
    "synopsis": "### Functional interface:\nuse Crypt::Mac::BLAKE2b qw( blake2b blake2bhex );\n# calculate MAC from string/buffer\n$blake2braw  = blake2b($size, $key, 'data buffer');\n$blake2bhex  = blake2bhex($size, $key, 'data buffer');\n$blake2bb64  = blake2bb64($size, $key, 'data buffer');\n$blake2bb64u = blake2bb64u($size, $key, 'data buffer');\n### OO interface:\nuse Crypt::Mac::BLAKE2b;\n$d = Crypt::Mac::BLAKE2b->new($size, $key);\n$d->add('any data');\n$d->addfile('filename.dat');\n$d->addfile(*FILEHANDLE);\n$resultraw  = $d->mac;     # raw bytes\n$resulthex  = $d->hexmac;  # hexadecimal form\n$resultb64  = $d->b64mac;  # Base64 form\n$resultb64u = $d->b64umac; # Base64 URL Safe form",
    "sections": {
        "NAME": {
            "content": "Crypt::Mac::BLAKE2b - Message authentication code BLAKE2b MAC (RFC 7693)\n",
            "subsections": []
        },
        "SYNOPSIS": {
            "content": "### Functional interface:\nuse Crypt::Mac::BLAKE2b qw( blake2b blake2bhex );\n\n# calculate MAC from string/buffer\n$blake2braw  = blake2b($size, $key, 'data buffer');\n$blake2bhex  = blake2bhex($size, $key, 'data buffer');\n$blake2bb64  = blake2bb64($size, $key, 'data buffer');\n$blake2bb64u = blake2bb64u($size, $key, 'data buffer');\n\n### OO interface:\nuse Crypt::Mac::BLAKE2b;\n\n$d = Crypt::Mac::BLAKE2b->new($size, $key);\n$d->add('any data');\n$d->addfile('filename.dat');\n$d->addfile(*FILEHANDLE);\n$resultraw  = $d->mac;     # raw bytes\n$resulthex  = $d->hexmac;  # hexadecimal form\n$resultb64  = $d->b64mac;  # Base64 form\n$resultb64u = $d->b64umac; # Base64 URL Safe form\n",
            "subsections": []
        },
        "DESCRIPTION": {
            "content": "Provides an interface to the BLAKE2b message authentication code (MAC) algorithm.\n",
            "subsections": []
        },
        "EXPORT": {
            "content": "Nothing is exported by default.\n\nYou can export selected functions:\n\nuse Crypt::Mac::BLAKE2b qw(blake2b blake2bhex );\n\nOr all of them at once:\n\nuse Crypt::Mac::BLAKE2b ':all';\n",
            "subsections": []
        },
        "FUNCTIONS": {
            "content": "blake2b\nLogically joins all arguments into a single string, and returns its BLAKE2b message\nauthentication code encoded as a binary string.\n\n$blake2braw = blake2b($size, $key, 'data buffer');\n#or\n$blake2braw = blake2b($size, $key, 'any data', 'more data', 'even more data');\n\nblake2bhex\nLogically joins all arguments into a single string, and returns its BLAKE2b message\nauthentication code encoded as a hexadecimal string.\n\n$blake2bhex = blake2bhex($size, $key, 'data buffer');\n#or\n$blake2bhex = blake2bhex($size, $key, 'any data', 'more data', 'even more data');\n\nblake2bb64\nLogically joins all arguments into a single string, and returns its BLAKE2b message\nauthentication code encoded as a Base64 string.\n\n$blake2bb64 = blake2bb64($size, $key, 'data buffer');\n#or\n$blake2bb64 = blake2bb64($size, $key, 'any data', 'more data', 'even more data');\n\nblake2bb64u\nLogically joins all arguments into a single string, and returns its BLAKE2b message\nauthentication code encoded as a Base64 URL Safe string (see RFC 4648 section 5).\n\n$blake2bb64url = blake2bb64u($size, $key, 'data buffer');\n#or\n$blake2bb64url = blake2bb64u($size, $key, 'any data', 'more data', 'even more data');\n",
            "subsections": []
        },
        "METHODS": {
            "content": "new\n$d = Crypt::Mac::BLAKE2b->new($size, $key);\n\nclone\n$d->clone();\n\nreset\n$d->reset();\n\nadd\n$d->add('any data');\n#or\n$d->add('any data', 'more data', 'even more data');\n\naddfile\n$d->addfile('filename.dat');\n#or\n$d->addfile(*FILEHANDLE);\n\nmac\n$resultraw = $d->mac();\n\nhexmac\n$resulthex = $d->hexmac();\n\nb64mac\n$resultb64 = $d->b64mac();\n\nb64umac\n$resultb64url = $d->b64umac();\n",
            "subsections": []
        },
        "SEE ALSO": {
            "content": "*   CryptX\n\n*   <https://tools.ietf.org/html/rfc7693>\n",
            "subsections": []
        }
    },
    "summary": "Crypt::Mac::BLAKE2b - Message authentication code BLAKE2b MAC (RFC 7693)",
    "flags": [],
    "examples": [],
    "see_also": []
}