Qore Programming Language Reference Manual 0.8.8

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Functions
HMAC Functions

## Functions
string | Qore::DSS1_hmac (data data, string key)
| Returns the DSS1 (SHA-1 and DSA) based HMAC of the supplied argument as a hex string. More...
string | Qore::DSS_hmac (data data, string key)
| Returns the DSS (SHA-0 and DSA) based HMAC of the supplied argument as a hex string. More...
string | Qore::MD2_hmac (data data, string key)
| Returns the MD2 based HMAC of the supplied argument as a hex string. More...
string | Qore::MD4_hmac (data data, string key)
| Returns the MD4 based HMAC of the supplied argument as a hex string. More...
string | Qore::MD5_hmac (data data, string key)
| Returns the MD5 based HMAC of the supplied argument as a hex string. More...
string | Qore::MDC2_hmac (data data, string key)
| Returns the MDC2 based HMAC of the supplied argument as a hex string. More...
string | Qore::RIPEMD160_hmac (data data, string key)
| Returns the RIPEMD based HMAC of the supplied argument as a hex string. More...
string | Qore::SHA1_hmac (data data, string key)
| Returns the SHA1 based HMAC of the supplied argument as a hex string. More...
string | Qore::SHA224_hmac (data data, string key)
| Returns the SHA224 based HMAC of the supplied argument as a hex string. More...
string | Qore::SHA256_hmac (data data, string key)
| Returns the SHA256 based HMAC of the supplied argument as a hex string. More...
string | Qore::SHA384_hmac (data data, string key)
| Returns the SHA384 based HMAC of the supplied argument as a hex string. More...
string | Qore::SHA512_hmac (data data, string key)
| Returns the SHA512 based HMAC of the supplied argument as a hex string. More...
string | Qore::SHA_hmac (data data, string key)
| Returns the SHA based HMAC of the supplied argument as a hex string. More...

## Detailed Description

Qore's cryptography support is provided by the OpenSSL library.

In cryptography, a keyed-hash message authentication code (HMAC) is a specific construction for calculating a message authentication code (MAC) involving a cryptographic hash function in combination with a secret cryptographic key. As with any MAC, it may be used to simultaneously verify both the data integrity and the authentication of a message. Any cryptographic hash function, such as MD5 or SHA-1, may be used in the calculation of an HMAC; the resulting MAC algorithm is termed HMAC-MD5 or HMAC-SHA1 accordingly. The cryptographic strength of the HMAC depends upon the cryptographic strength of the underlying hash function, the size of its hash output, and on the size and quality of the key.

For more info: Wikipedia's Hash-based message authentication code article.

See also:

- Crytographic Functions
- Digest (Hash) Functions
- Crytographic Contants

## Function Documentation

string Qore::DSS1_hmac | ( | data | data,
|  | string | key
| ) |  |

Returns the DSS1 (SHA-1 and DSA) based HMAC of the supplied argument as a hex string.

Parameters

  data | the data to process and produce a digest for; the trailing null character is not included in the digest when processing string arguments
  key | a secret passphrase/key

Returns
  a hex string of the digest (ex: `"37a3cc73159aa129b0eb22bbdf4b9309d389f629"`)

Example:
  my string $str = DSS1_hmac("Hello There This is a Test - 1234567890", "a key");
  # returns "37a3cc73159aa129b0eb22bbdf4b9309d389f629"

Note
  this algorithm is considered outdated and is included for backwards-compatibility

Exceptions

  DSS1-HMAC-ERROR | error calculating digest (should not normally happen)

string Qore::DSS_hmac | ( | data | data,
|  | string | key
| ) |  |

Returns the DSS (SHA-0 and DSA) based HMAC of the supplied argument as a hex string.

Parameters

  data | the data to process and produce a digest for; the trailing null character is not included in the digest when processing string arguments
  key | a secret passphrase/key

Returns
  a hex string of the digest (ex: `"37a3cc73159aa129b0eb22bbdf4b9309d389f629"`)

Example:
  my string $str = DSS_hmac("Hello There This is a Test - 1234567890", "a key");
  # returns "37a3cc73159aa129b0eb22bbdf4b9309d389f629"

Note
  this algorithm is considered outdated and is included for backwards-compatibility

Exceptions

  DSS-HMAC-ERROR | error calculating digest (should not normally happen)

string Qore::MD2_hmac | ( | data | data,
|  | string | key
| ) |  |

Returns the MD2 based HMAC of the supplied argument as a hex string.

Platform Availability:
  Qore::Option::HAVE_MD2

Parameters

  data | the data to process and produce a digest for; the trailing null character is not included in the digest when processing string arguments
  key | a secret passphrase/key

Returns
  a hex string of the digest (ex: `"27f5f17500b408e97643403ea8ef1413"`)

Example:
  my string $str = MD2_hmac("Hello There This is a Test - 1234567890", "a key");
  # returns "27f5f17500b408e97643403ea8ef1413"

Exceptions

  MD2-HMAC-ERROR | error calculating digest (should not normally happen)

See Also
  MD2_bin()

string Qore::MD4_hmac | ( | data | data,
|  | string | key
| ) |  |

Returns the MD4 based HMAC of the supplied argument as a hex string.

Parameters

  data | the data to process and produce a digest for; the trailing null character is not included in the digest when processing string arguments
  key | a secret passphrase/key

Returns
  a hex string of the digest (ex: `"053d084f321a3886e60166ebd9609ce1"`)

Example:
  my string $str = MD4_hmac("Hello There This is a Test - 1234567890", "a key");
  # returns "053d084f321a3886e60166ebd9609ce1"

Exceptions

  MD4-HMAC-ERROR | error calculating digest (should not normally happen)

string Qore::MD5_hmac | ( | data | data,
|  | string | key
| ) |  |

Returns the MD5 based HMAC of the supplied argument as a hex string.

Parameters

  data | the data to process and produce a digest for; the trailing null character is not included in the digest when processing string arguments
  key | a secret passphrase/key

Returns
  a hex string of the digest (ex: `"87505c6164aaf6ca6315233902a01ef4"`)

Example:
  my string $str = MD5_hmac("Hello There This is a Test - 1234567890", "a key");
  # returns "87505c6164aaf6ca6315233902a01ef4"

Note
  the MD5 algorithm is not collision-resistant; it's recommended to use another hash algorithm (like SHA-256) if cryptographic security is important

Exceptions

  MD5-HMAC-ERROR | error calculating digest (should not normally happen)

string Qore::MDC2_hmac | ( | data | data,
|  | string | key
| ) |  |

Returns the MDC2 based HMAC of the supplied argument as a hex string.

Parameters

  data | the data to process and produce a digest for; the trailing null character is not included in the digest when processing string arguments
  key | a secret passphrase/key

Returns
  a hex string of the digest (ex: `"e0ef6a6803e58807c5db395e180a999c"`)

Example:
  my string $str = MDC2_hmac("Hello There This is a Test - 1234567890", "a key");
  # returns "e0ef6a6803e58807c5db395e180a999c"

Exceptions

  MDC2-HMAC-ERROR | error calculating digest (should not normally happen)

string Qore::RIPEMD160_hmac | ( | data | data,
|  | string | key
| ) |  |

Returns the RIPEMD based HMAC of the supplied argument as a hex string.

Parameters

  data | the data to process and produce a digest for; the trailing null character is not included in the digest when processing string arguments
  key | a secret passphrase/key

Returns
  a hex string of the digest (ex: `"4bca70bca1601aba57624eeb2606535cb12f2079"`)

Example:
  my string $str = RIPEMD160_hmac("Hello There This is a Test - 1234567890", "a key");
  # returns "4bca70bca1601aba57624eeb2606535cb12f2079"

Exceptions

  RIPEMD160-HMAC-ERROR | error calculating digest (should not normally happen)

string Qore::SHA1_hmac | ( | data | data,
|  | string | key
| ) |  |

Returns the SHA1 based HMAC of the supplied argument as a hex string.

Parameters

  data | the data to process and produce a digest for; the trailing null character is not included in the digest when processing string arguments
  key | a secret passphrase/key

Returns
  a hex string of the digest (ex: `"37a3cc73159aa129b0eb22bbdf4b9309d389f629"`)

Example:
  my string $str = SHA1_hmac("Hello There This is a Test - 1234567890", "a key");
  # returns "37a3cc73159aa129b0eb22bbdf4b9309d389f629"

Note
  Cryptographic weaknesses were discovered in SHA-1, and the standard was no longer approved for most cryptographic uses after 2010.

Exceptions

  SHA1-HMAC-ERROR | error calculating digest (should not normally happen)

string Qore::SHA224_hmac | ( | data | data,
|  | string | key
| ) |  |

Returns the SHA224 based HMAC of the supplied argument as a hex string.

Platform Availability:
  Qore::Option::HAVE_SHA224

Parameters

  data | the data to process and produce a digest for; the trailing null character is not included in the digest when processing string arguments
  key | a secret passphrase/key

Returns
  a hex string of the digest (ex: `"fad5667fa5aa412044555b7e077fced62372fe9c6ce20815609da12c"`)

Example:
  my string $str = SHA224_hmac("Hello There This is a Test - 1234567890", "a key");
  # returns "fad5667fa5aa412044555b7e077fced62372fe9c6ce20815609da12c"

Exceptions

  SHA224-HMAC-ERROR | error calculating digest (should not normally happen)

string Qore::SHA256_hmac | ( | data | data,
|  | string | key
| ) |  |

Returns the SHA256 based HMAC of the supplied argument as a hex string.

Platform Availability:
  Qore::Option::HAVE_SHA256

Parameters

  data | the data to process and produce a digest for; the trailing null character is not included in the digest when processing string arguments
  key | a secret passphrase/key

Returns
  a hex string of the digest (ex: `"1c90c21e227712b62019ff831f34cba22c2e70f1a902651ef69a70705ee0f754"`)

Example:
  my string $str = SHA256_hmac("Hello There This is a Test - 1234567890", "a key");
  # returns "1c90c21e227712b62019ff831f34cba22c2e70f1a902651ef69a70705ee0f754"

Exceptions

  SHA256-HMAC-ERROR | error calculating digest (should not normally happen)

string Qore::SHA384_hmac | ( | data | data,
|  | string | key
| ) |  |

Returns the SHA384 based HMAC of the supplied argument as a hex string.

Platform Availability:
  Qore::Option::HAVE_SHA384

Parameters

  data | the data to process and produce a digest for; the trailing null character is not included in the digest when processing string arguments
  key | a secret passphrase/key

Returns
  a hex string of the digest (ex: `"e2c253c6dcb050990b4da3cee95cd7b227f43388fa8116f476f59395af295d0d3bb7156ab2fcd0663b0500249a7a0865"`)

Example:
  my string $str = SHA384_hmac("Hello There This is a Test - 1234567890", "a key");
  # returns "e2c253c6dcb050990b4da3cee95cd7b227f43388fa8116f476f59395af295d0d3bb7156ab2fcd0663b0500249a7a0865"

Exceptions

  SHA384-HMAC-ERROR | error calculating digest (should not normally happen)

string Qore::SHA512_hmac | ( | data | data,
|  | string | key
| ) |  |

Returns the SHA512 based HMAC of the supplied argument as a hex string.

Platform Availability:
  Qore::Option::HAVE_SHA512

Parameters

  data | the data to process and produce a digest for; the trailing null character is not included in the digest when processing string arguments
  key | a secret passphrase/key

Returns
  a hex string of the digest (ex: `"8dcefd7ea3f90ff1c822b5e9547fc36edf78c3e4ce13d47510a212a406bdda1a4094e7ea5ade90e1c736e204d331a814520eba49f3d074e2c261208de07264f6"`)

Example:
  my string $str = SHA512_hmac("Hello There This is a Test - 1234567890", "a key");
  # returns "8dcefd7ea3f90ff1c822b5e9547fc36edf78c3e4ce13d47510a212a406bdda1a4094e7ea5ade90e1c736e204d331a814520eba49f3d074e2c261208de07264f6"

Exceptions

  SHA512-HMAC-ERROR | error calculating digest (should not normally happen)

string Qore::SHA_hmac | ( | data | data,
|  | string | key
| ) |  |

Returns the SHA based HMAC of the supplied argument as a hex string.

Parameters

  data | the data to process and produce a digest for; the trailing null character is not included in the digest when processing string arguments
  key | a secret passphrase/key

Returns
  a hex string of the digest (ex: `"0ad47c8d36dc4606d52f7e4cbd144ef2fda492a0"`)

Example:
  my string $str = SHA_hmac("Hello There This is a Test - 1234567890", "a key");
  # returns "0ad47c8d36dc4606d52f7e4cbd144ef2fda492a0"

Note
  SHA/SHA0 was withdrawn shortly after publication due to an undisclosed "significant flaw" and replaced by the slightly revised version SHA-1.

Exceptions

  SHA-HMAC-ERROR | error calculating digest (should not normally happen)