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注意: このページはまだ日本語に翻訳されていません。以下は英語の原文です。 
function computeHmac(
   algorithm, 
   _key, 
   _data): string
Return the HMAC for data using the key key with the underlying algo used for compression.

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Parameters

ParameterTypeDescription
algorithm"sha256" | "sha512"The algorithm to use for compression.
_keyBytesLikeThe key to use for the HMAC.
_dataBytesLikeThe data to authenticate.

​
Returns

string The HMAC of the data.

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Example

key = id('some-secret');

// Compute the HMAC
computeHmac('sha256', key, '0x1337');

// To compute the HMAC of UTF-8 data, the data must be
// converted to UTF-8 bytes
computeHmac('sha256', key, toUtf8Bytes('Hello World'));

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Source

crypto/hmac.ts:41