crypto_evp_hmac()

    
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Calculates the HMAC of "buffer" using digest algorithm "digestname" and key "key", placing the HMAC in "digest". The HMAC output is always in raw binary format, use miva_hex_encode() or crypto_base64_encode() if other output formats are desired.
Syntax 
crypto_evp_hmac( digestname, key, buffer var, digest var )
Returns 1 on success or 0 if an invalid or unsupported "digestname" is specified.
  • digestname = an OpenSSL digest identifier, such as "sha256" or "md5".
  • buffer = The data that will be process.
  • digest = The result of the HMAC function.
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