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121
COPYING
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121
COPYING
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Creative Commons Legal Code
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CC0 1.0 Universal
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LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN
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44
Makefile
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44
Makefile
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# vala-otp
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# Written in 2022 by Lucas
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#
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# To the extent possible under law, the author(s) have dedicated all
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# copyright and related and neighboring rights to this software to the
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||||
# public domain worldwide. This software is distributed without any
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# warranty.
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#
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# You should have received a copy of the CC0 Public Domain Dedication
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# along with this software. If not, see
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# <http://creativecommons.org/publicdomain/zero/1.0/>.
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.POSIX:
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.SUFFIXES:
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P = otp
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V = 0.0
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DIST = COPYING Makefile opt.vala t/rfc.vala
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all: libotp.so
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clean:
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rm -f otp.h libotp.so otp.vapi ${P}-${V}.tgz
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test: t/rfc.t
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run-tests: test
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LD_LIBRARY_PATH=. prove
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dist: clean
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pax -w -s ',^,$P-$V/,' ${DIST} | gzip >$P-$V.tgz
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install: all
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mkdir -p ${PREFIX}/bin
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cp -f ${BIN} ${PREFIX}/bin
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uninstall:
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cd ${PREFIX}/bin && rm -f ${BIN}
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libotp.so: otp.vala
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valac --library=otp -H otp.h -X -fPIC -X -shared -o libotp.so otp.vala
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t/rfc.t: libotp.so
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valac -X -I. -X libotp.so -o t/rfc.t otp.vapi t/rfc.vala
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163
otp.vala
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163
otp.vala
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/* otp.vala
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*
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* Written in 2022 by Lucas
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*
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* To the extent possible under law, the author(s) have dedicated all
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* copyright and related and neighboring rights to this software to the
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* public domain worldwide. This software is distributed without any
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* warranty.
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*
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* You should have received a copy of the CC0 Public Domain Dedication
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* along with this software. If not, see
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* <http://creativecommons.org/publicdomain/zero/1.0/>.
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*/
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namespace Otp {
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public abstract class Otp : GLib.Object {
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protected uint8[] key;
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protected int _digits = 6;
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public int digits {
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get { return _digits; }
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set {
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return_if_fail(value >= 6 && value <= 10);
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_digits = value;
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}
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}
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private ChecksumType[] ALLOWED_ALGORITHMS = {
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ChecksumType.SHA1,
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ChecksumType.SHA256,
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ChecksumType.SHA512,
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};
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protected ChecksumType _algorithm = ChecksumType.SHA1;
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public ChecksumType algorithm {
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get { return _algorithm; }
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set {
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return_if_fail(value in ALLOWED_ALGORITHMS);
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_algorithm = value;
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}
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}
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protected int32 _compute_value(uint64 counter) {
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uint digits = this._digits, modulo = 0;
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if (digits < 10)
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for (modulo = 1000000; digits > 6; digits--)
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modulo *= 10;
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Hmac hmac = new Hmac(this.algorithm, this.key);
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uint8 buf[8];
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buf[0] = (uint8)(counter >> 56);
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buf[1] = (uint8)((counter >> 48) & 0xff);
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buf[2] = (uint8)((counter >> 40) & 0xff);
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buf[3] = (uint8)((counter >> 32) & 0xff);
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buf[4] = (uint8)((counter >> 24) & 0xff);
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buf[5] = (uint8)((counter >> 16) & 0xff);
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buf[6] = (uint8)((counter >> 8) & 0xff);
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buf[7] = (uint8)(counter & 0xff);
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hmac.update(buf);
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uint8[] digest = new uint8[64];
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size_t digest_len = digest.length;
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hmac.get_digest(digest, ref digest_len);
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uint offset = digest[digest_len - 1] & 0xf;
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uint res = (digest[offset] << 24) |
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(digest[offset + 1] << 16) |
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(digest[offset + 2] << 8) |
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digest[offset + 3];
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res &= 0x7fffffff;
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return digits == 10 ? (int32)res :
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(int32)(res % modulo);
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}
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}
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public class Hotp : Otp {
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public Hotp(uint8[] key, int digits = 6,
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ChecksumType algorithm = ChecksumType.SHA1) {
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this.key = key;
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this.digits = digits;
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this.algorithm = algorithm;
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}
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public string get_value_at(uint64 counter) {
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int32 result = this._compute_value(counter);
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return ("%0*" + int32.FORMAT).printf(this.digits,
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result);
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}
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public static string compute(uint8[] key, uint counter = 0,
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int digits = 6,
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ChecksumType algorithm = ChecksumType.SHA1)
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requires (digits >= 6 && digits <= 10)
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ensures (result.length == digits)
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{
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Hotp hotp = new Hotp(key, digits, algorithm);
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return hotp.get_value_at(counter);
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}
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}
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public class Totp : Otp {
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private uint _period = 30;
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public uint period {
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get { return _period; }
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set {
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return_if_fail(value != 0);
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_period = value;
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}
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}
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public Totp(uint8[] key, uint period = 30, int digits = 6,
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ChecksumType algorithm = ChecksumType.SHA1) {
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this.key = key;
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this.period = period;
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this.digits = digits;
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this.algorithm = algorithm;
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}
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public static string compute_at_timestamp(uint8[] key,
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int64 time, uint period = 30, int digits = 6,
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ChecksumType algorithm = ChecksumType.SHA1)
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requires (digits >= 6 && digits <= 10)
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requires (period != 0)
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ensures (result.length == digits)
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{
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Totp totp = new Totp(key, period, digits, algorithm);
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return totp.get_value_at_timestamp(time);
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}
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public static string compute_at_datetime(uint8[] key,
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DateTime dt, uint period = 30, int digits = 6,
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ChecksumType algorithm = ChecksumType.SHA1)
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{
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return Totp.compute_at_timestamp(key, dt.to_unix(),
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period, digits, algorithm);
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}
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public static string compute_at_now(uint8[] key,
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uint period = 30, int digits = 6,
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ChecksumType algorithm = ChecksumType.SHA1)
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{
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return Totp.compute_at_timestamp(key,
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new DateTime.now_utc().to_unix(), period, digits,
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algorithm);
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}
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public string get_value_at_timestamp(int64 time) {
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int32 result = this._compute_value(time / this.period);
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return ("%0*" + int32.FORMAT).printf(this.digits,
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result);
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}
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public string get_value_at_datetime(DateTime dt) {
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return get_value_at_timestamp(dt.to_unix());
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}
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public string get_value_at_now() {
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return get_value_at_timestamp(
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new DateTime.now_utc().to_unix());
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}
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}
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}
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87
t/rfc.vala
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87
t/rfc.vala
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/* rfc.vala
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*
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||||
* Written in 2022 by Lucas
|
||||
*
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||||
* To the extent possible under law, the author(s) have dedicated all
|
||||
* copyright and related and neighboring rights to this software to the
|
||||
* public domain worldwide. This software is distributed without any
|
||||
* warranty.
|
||||
*
|
||||
* You should have received a copy of the CC0 Public Domain Dedication
|
||||
* along with this software. If not, see
|
||||
* <http://creativecommons.org/publicdomain/zero/1.0/>.
|
||||
*/
|
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unowned string RFC_4226_KEY = "12345678901234567890";
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unowned string RFC_6238_SHA1_KEY = "12345678901234567890";
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unowned string RFC_6238_SHA256_KEY = "12345678901234567890123456789012";
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unowned string RFC_6238_SHA512_KEY = "123456789012345678901234567890" +
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"1234567890123456789012345678901234";
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|
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void add_rfc_4226_test_vectors() {
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Test.add_func("/otp/rfc4226", () => {
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Otp.Hotp hotp = new Otp.Hotp(RFC_4226_KEY.data);
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assert(hotp.get_value_at(0) == "755224");
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assert(hotp.get_value_at(1) == "287082");
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assert(hotp.get_value_at(2) == "359152");
|
||||
assert(hotp.get_value_at(3) == "969429");
|
||||
assert(hotp.get_value_at(4) == "338314");
|
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assert(hotp.get_value_at(5) == "254676");
|
||||
assert(hotp.get_value_at(6) == "287922");
|
||||
assert(hotp.get_value_at(7) == "162583");
|
||||
assert(hotp.get_value_at(8) == "399871");
|
||||
assert(hotp.get_value_at(9) == "520489");
|
||||
});
|
||||
}
|
||||
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||||
void add_rfc_6238_sha1_test_vectors() {
|
||||
Test.add_func("/otp/rfc6238/sha1", () => {
|
||||
Otp.Totp totp = new Otp.Totp(RFC_6238_SHA1_KEY.data, 30, 8,
|
||||
ChecksumType.SHA1);
|
||||
|
||||
assert(totp.get_value_at_timestamp(59) == "94287082");
|
||||
assert(totp.get_value_at_timestamp(1111111109) == "07081804");
|
||||
assert(totp.get_value_at_timestamp(1111111111) == "14050471");
|
||||
assert(totp.get_value_at_timestamp(1234567890) == "89005924");
|
||||
assert(totp.get_value_at_timestamp(2000000000) == "69279037");
|
||||
assert(totp.get_value_at_timestamp(20000000000) == "65353130");
|
||||
});
|
||||
}
|
||||
|
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void add_rfc_6238_sha256_test_vectors() {
|
||||
Test.add_func("/otp/rfc6238/sha256", () => {
|
||||
Otp.Totp totp = new Otp.Totp(RFC_6238_SHA256_KEY.data, 30, 8,
|
||||
ChecksumType.SHA256);
|
||||
|
||||
assert(totp.get_value_at_timestamp(59) == "46119246");
|
||||
assert(totp.get_value_at_timestamp(1111111109) == "68084774");
|
||||
assert(totp.get_value_at_timestamp(1111111111) == "67062674");
|
||||
assert(totp.get_value_at_timestamp(1234567890) == "91819424");
|
||||
assert(totp.get_value_at_timestamp(2000000000) == "90698825");
|
||||
assert(totp.get_value_at_timestamp(20000000000) == "77737706");
|
||||
});
|
||||
}
|
||||
|
||||
void add_rfc_6238_sha512_test_vectors() {
|
||||
Test.add_func("/otp/rfc6238/sha512", () => {
|
||||
Otp.Totp totp = new Otp.Totp(RFC_6238_SHA512_KEY.data, 30, 8,
|
||||
ChecksumType.SHA512);
|
||||
|
||||
assert(totp.get_value_at_timestamp(59) == "90693936");
|
||||
assert(totp.get_value_at_timestamp(1111111109) == "25091201");
|
||||
assert(totp.get_value_at_timestamp(1111111111) == "99943326");
|
||||
assert(totp.get_value_at_timestamp(1234567890) == "93441116");
|
||||
assert(totp.get_value_at_timestamp(2000000000) == "38618901");
|
||||
assert(totp.get_value_at_timestamp(20000000000) == "47863826");
|
||||
});
|
||||
}
|
||||
|
||||
void main(string[] args) {
|
||||
Test.init(ref args);
|
||||
add_rfc_4226_test_vectors();
|
||||
add_rfc_6238_sha1_test_vectors();
|
||||
add_rfc_6238_sha256_test_vectors();
|
||||
add_rfc_6238_sha512_test_vectors();
|
||||
Test.run();
|
||||
}
|
||||
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