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Returns the base64-representation of arg as a string. The argument arg may be a string, a non-negative integer or a list of octets.
Examples:
(%i1) base64: base64("foo bar baz");
(%o1) Zm9vIGJhciBiYXo=
(%i2) string: base64_decode(base64);
(%o2) foo bar baz
(%i3) obase: 16.$
(%i4) integer: base64_decode(base64, 'number);
(%o4) 666f6f206261722062617a
(%i5) octets: base64_decode(base64, 'list);
(%o5) [66, 6F, 6F, 20, 62, 61, 72, 20, 62, 61, 7A]
(%i6) ibase: 16.$
(%i7) base64(octets);
(%o7) Zm9vIGJhciBiYXo=
Note that if arg contains umlauts (resp. octets larger than 127) the resulting base64-string is platform dependent. However the decoded string will be equal to the original.
By default base64_decode decodes the base64-string back to the original string.
The optional argument return-type allows base64_decode to
alternatively return the corresponding number or list of octets.
return-type may be string, number or list.
Example: See base64.
By default crc24sum returns the CRC24 checksum of an octet-list
as a string.
The optional argument return-type allows crc24sum to
alternatively return the corresponding number or list of octets.
return-type may be string, number or list.
Example:
-----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQEcBAEBAgAGBQJVdCTzAAoJEG/1Mgf2DWAqCSYH/AhVFwhu1D89C3/QFcgVvZTM wnOYzBUURJAL/cT+IngkLEpp3hEbREcugWp+Tm6aw3R4CdJ7G3FLxExBH/5KnDHi rBQu+I7+3ySK2hpryQ6Wx5J9uZSa4YmfsNteR8up0zGkaulJeWkS4pjiRM+auWVe vajlKZCIK52P080DG7Q2dpshh4fgTeNwqCuCiBhQ73t8g1IaLdhDN6EzJVjGIzam /spqT/sTo6sw8yDOJjvU+Qvn6/mSMjC/YxjhRMaQt9EMrR1AZ4ukBF5uG1S7mXOH WdiwkSPZ3gnIBhM9SuC076gLWZUNs6NqTeE3UzMjDAFhH3jYk1T7mysCvdtIkms= =WmeC -----END PGP SIGNATURE-----
(%i1) ibase : obase : 16.$ (%i2) sig64 : sconcat( "iQEcBAEBAgAGBQJVdCTzAAoJEG/1Mgf2DWAqCSYH/AhVFwhu1D89C3/QFcgVvZTM", "wnOYzBUURJAL/cT+IngkLEpp3hEbREcugWp+Tm6aw3R4CdJ7G3FLxExBH/5KnDHi", "rBQu+I7+3ySK2hpryQ6Wx5J9uZSa4YmfsNteR8up0zGkaulJeWkS4pjiRM+auWVe", "vajlKZCIK52P080DG7Q2dpshh4fgTeNwqCuCiBhQ73t8g1IaLdhDN6EzJVjGIzam", "/spqT/sTo6sw8yDOJjvU+Qvn6/mSMjC/YxjhRMaQt9EMrR1AZ4ukBF5uG1S7mXOH", "WdiwkSPZ3gnIBhM9SuC076gLWZUNs6NqTeE3UzMjDAFhH3jYk1T7mysCvdtIkms=" )$ (%i3) octets: base64_decode(sig64, 'list)$ (%i4) crc24: crc24sum(octets, 'list); (%o4) [5A, 67, 82] (%i5) base64(crc24); (%o5) WmeC
Returns the MD5 checksum of a string, non-negative integer,
list of octets, or binary (not character) input stream.
A file for which an input stream is opened may be an ordinary text file;
it is the stream which needs to be binary, not the file itself.
When the argument is an input stream,
md5sum reads the entire content of the stream,
but does not close the stream.
The default return value is a string containing 32 hex characters.
The optional argument return-type allows md5sum to alternatively
return the corresponding number or list of octets.
return-type may be string, number or list.
Note that in case arg contains German umlauts or other non-ASCII
characters (resp. octets larger than 127) the MD5 checksum is platform dependent.
Examples:
(%i1) ibase: obase: 16.$
(%i2) msg: "foo bar baz"$
(%i3) string: md5sum(msg);
(%o3) ab07acbb1e496801937adfa772424bf7
(%i4) integer: md5sum(msg, 'number);
(%o4) 0ab07acbb1e496801937adfa772424bf7
(%i5) octets: md5sum(msg, 'list);
(%o5) [0AB,7,0AC,0BB,1E,49,68,1,93,7A,0DF,0A7,72,42,4B,0F7]
(%i6) sdowncase( printf(false, "~{~2,'0x~^:~}", octets) );
(%o6) ab:07:ac:bb:1e:49:68:01:93:7a:df:a7:72:42:4b:f7
The argument may be a binary input stream.
(%i1) S: openr_binary (file_search ("md5.lisp"));
(%o1) #<INPUT BUFFERED FILE-STREAM (UNSIGNED-BYTE 8)
/home/robert/maxima/maxima-code/share/stringproc/md5.lisp>
(%i2) md5sum (S);
(%o2) 31a512ed53daf5b99495c9d05559355f
(%i3) close (S);
(%o3) true
Returns a pseudo random number of variable length. By default the returned value is a number with a length of len octets.
The optional argument return-type allows mgf1_sha1 to alternatively
return the corresponding list of len octets.
return-type may be number or list.
The computation of the returned value is described in RFC 3447,
appendix B.2.1 MGF1.
SHA1 is used as hash function, i.e. the randomness of the computed number
relies on the randomness of SHA1 hashes.
Example:
(%i1) ibase: obase: 16.$ (%i2) number: mgf1_sha1(4711., 8); (%o2) 0e0252e5a2a42fea1 (%i3) octets: mgf1_sha1(4711., 8, 'list); (%o3) [0E0,25,2E,5A,2A,42,0FE,0A1]
Returns an octet-representation of number as a list of octets. The number must be a non-negative integer.
Example:
(%i1) ibase : obase : 16.$ (%i2) octets: [0ca,0fe,0ba,0be]$ (%i3) number: octets_to_number(octets); (%o3) 0cafebabe (%i4) number_to_octets(number); (%o4) [0CA, 0FE, 0BA, 0BE]
Returns a number by concatenating the octets in the list of octets.
Example: See number_to_octets.
Computes an object identifier (OID) from the list of octets.
Example: RSA encryption OID
(%i1) ibase : obase : 16.$ (%i2) oid: octets_to_oid([2A,86,48,86,0F7,0D,1,1,1]); (%o2) 1.2.840.113549.1.1.1 (%i3) oid_to_octets(oid); (%o3) [2A, 86, 48, 86, 0F7, 0D, 1, 1, 1]
Decodes the list of octets into a string according to current system defaults. When decoding octets corresponding to Non-US-ASCII characters the result depends on the platform, application and underlying Lisp.
Example: Using system defaults (Maxima compiled with GCL, which uses no format definition and simply passes through the UTF-8-octets encoded by the GNU/Linux terminal).
(%i1) octets: string_to_octets("abc");
(%o1) [61, 62, 63]
(%i2) octets_to_string(octets);
(%o2) abc
(%i3) ibase: obase: 16.$
(%i4) unicode(20AC);
(%o4) €
(%i5) octets: string_to_octets(%);
(%o5) [0E2, 82, 0AC]
(%i6) octets_to_string(octets);
(%o6) €
(%i7) utf8_to_unicode(octets);
(%o7) 20AC
In case the external format of the Lisp reader is equal to UTF-8 the optional argument encoding allows to set the encoding for the octet to string conversion. If necessary see adjust_external_format for changing the external format.
Some names of supported encodings (see corresponding Lisp manual for more):
CCL, CLISP, SBCL: utf-8, ucs-2be, ucs-4be, iso-8859-1, cp1252, cp850
CMUCL: utf-8, utf-16-be, utf-32-be, iso8859-1, cp1252
ECL: utf-8, ucs-2be, ucs-4be, iso-8859-1, windows-cp1252, dos-cp850
Example (continued): Using the optional encoding argument (Maxima compiled with SBCL, GNU/Linux terminal).
(%i8) string_to_octets("€", "ucs-2be");
(%o8) [20, 0AC]
Converts an object identifier (OID) to a list of octets.
Example: See octets_to_oid.
Returns the SHA1 fingerprint of a string, a non-negative integer or
a list of octets. The default return value is a string containing 40 hex characters.
The optional argument return-type allows sha1sum to alternatively
return the corresponding number or list of octets.
return-type may be string, number or list.
Example:
(%i1) ibase: obase: 16.$
(%i2) msg: "foo bar baz"$
(%i3) string: sha1sum(msg);
(%o3) c7567e8b39e2428e38bf9c9226ac68de4c67dc39
(%i4) integer: sha1sum(msg, 'number);
(%o4) 0c7567e8b39e2428e38bf9c9226ac68de4c67dc39
(%i5) octets: sha1sum(msg, 'list);
(%o5) [0C7,56,7E,8B,39,0E2,42,8E,38,0BF,9C,92,26,0AC,68,0DE,4C,67,0DC,39]
(%i6) sdowncase( printf(false, "~{~2,'0x~^:~}", octets) );
(%o6) c7:56:7e:8b:39:e2:42:8e:38:bf:9c:92:26:ac:68:de:4c:67:dc:39
Note that in case arg contains German umlauts or other non-ASCII
characters (resp. octets larger than 127) the SHA1 fingerprint is platform dependent.
Returns the SHA256 fingerprint of a string, a non-negative integer or
a list of octets. The default return value is a string containing 64 hex characters.
The optional argument return-type allows sha256sum to alternatively
return the corresponding number or list of octets (see sha1sum).
Example:
(%i1) string: sha256sum("foo bar baz");
(%o1) dbd318c1c462aee872f41109a4dfd3048871a03dedd0fe0e757ced57dad6f2d7
Note that in case arg contains German umlauts or other non-ASCII
characters (resp. octets larger than 127) the SHA256 fingerprint is platform dependent.
Encodes a string into a list of octets according to current system defaults. When encoding strings containing Non-US-ASCII characters the result depends on the platform, application and underlying Lisp.
In case the external format of the Lisp reader is equal to UTF-8 the optional argument encoding allows to set the encoding for the string to octet conversion. If necessary see adjust_external_format for changing the external format.
See octets_to_string for examples and some more information.
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