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new fns: hex_encode and sha256

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Umgeher Torgersen 2023-01-08 16:52:51 +00:00
parent 831c37a26b
commit ceafc8ccb7
1 changed files with 45 additions and 33 deletions
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14
src/utools.erl
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@ -2,10 +2,12 @@
-export([b32_decode/1]).
-export([b32_encode/1]).
-export([hex_encode/1]).
-export([hotp/2]).
-export([rand_bytes/0, rand_bytes/1]).
-export([rand_chars/1]).
-export([rand_hash/0]).
-export([sha256/1]).
-export([totp/1, totp/2]).
-export([totp_check/2]).
-export([totp_generate/0]).
@ -63,6 +65,13 @@ b32_std_enc(I) when is_integer(I) andalso I >= 26 andalso I =< 31 ->
b32_std_enc(I) when is_integer(I) andalso I >= 0 andalso I =< 25 ->
I + $a.
hex_encode(<<X:128/big-unsigned-integer>>) ->
binary:list_to_bin(lists:flatten(io_lib:format("~32.16.0b", [X])));
hex_encode(<<X:160/big-unsigned-integer>>) ->
binary:list_to_bin(lists:flatten(io_lib:format("~40.16.0b", [X])));
hex_encode(<<X:256/big-unsigned-integer>>) ->
binary:list_to_bin(lists:flatten(io_lib:format("~64.16.0b", [X]))).
hotp(Token, Time) ->
K = b32_decode(Token),
M = <<Time:8/big-unsigned-integer-unit:8>>,
@ -92,7 +101,10 @@ rand_chars(Size) when Size > 0 ->
rand_hash() ->
{ok, R} = rand_chars(64),
{ok, binary:encode_hex(crypto:hash(sha256, <<"utools:rand_hash(", R/binary, ")">>))}.
{ok, sha256(<<"utools:rand_hash(", R/binary, ")">>)}.
sha256(<<Data/binary>>) ->
hex_encode(crypto:hash(sha256, Data)).
totp(<<Secret/binary>>) ->
totp(Secret, erlang:timestamp()).