https://bugzilla.redhat.com/show_bug.cgi?id=1284215



--- Comment #13 from Hin-Tak Leung <[email protected]> ---
The mm3.ttf font contains these two in the SPC_SP_OPUS_INFO_OBJID field in the
digital signature:

00000000   80 42 00 54 00 69 00 6D  00 65 00 73 00 20 00 4E   .B.T.i.m.e.s. .N
00000010   00 65 00 77 00 20 00 52  00 6F 00 6D 00 61 00 6E   .e.w. .R.o.m.a.n
00000020   00 20 00 46 00 6F 00 6E  00 74 00 20 00 56 00 65   . .F.o.n.t. .V.e
00000030   00 72 00 73 00 69 00 6F  00 6E 00 20 00 33 00 2E   .r.s.i.o.n. .3..
00000040   00 30 00 30                                        .0.0            

00000000   80 24 68 74 74 70 3A 2F  2F 77 77 77 2E 6D 69 63   .$http://www.mic
00000010   72 6F 73 6F 66 74 2E 63  6F 6D 2F 74 79 70 6F 67   rosoft.com/typog
00000020   72 61 70 68 79 20                                  raphy           

and

Signing Time: 18/10/2002 21:17:23

Myanmar1.ttf contains

00000000   80 46 00 54 00 61 00 68  00 6F 00 6D 00 61 00 20   .F.T.a.h.o.m.a. 
00000010   00 46 00 6F 00 6E 00 74  00 20 00 56 00 65 00 72   .F.o.n.t. .V.e.r
00000020   00 73 00 69 00 6F 00 6E  00 20 00 33 00 2E 00 31   .s.i.o.n. .3...1
00000030   00 34 00 20 00 66 00 6F  00 72 00 20 00 58 00 50   .4. .f.o.r. .X.P
00000040   00 20 00 53 00 50 00 32                            . .S.P.2        

00000000   80 24 68 74 74 70 3A 2F  2F 77 77 77 2E 6D 69 63   .$http://www.mic
00000010   72 6F 73 6F 66 74 2E 63  6F 6D 2F 74 79 70 6F 67   rosoft.com/typog
00000020   72 61 70 68 79 20                                  raphy           

and Signing Time: 17/06/2004 23:11:10

(The XX part of '80 XX" is simply the length - 80 is a tag for general
free-format data).

/usr/share/fonts/google-noto/NotoSansMyanmar-Regular.ttf from
google-noto-sans-myanmar-fonts package seems to cover the same language.

I agree that given the doubt, and that there seems to be another font which
provides for the same language (somebody please check this), it is perhaps best
to remove this font package.

Times and Tahoma on win 8.1 contains this in the first field:

00000000   80 28 00 4D 00 69 00 63  00 72 00 6F 00 73 00 6F   .(.M.i.c.r.o.s.o
00000010   00 66 00 74 00 20 00 54  00 79 00 70 00 6F 00 67   .f.t. .T.y.p.o.g
00000020   00 72 00 61 00 70 00 68  00 79                     .r.a.p.h.y      

On win 7, Times and Tahoma have just the font names:

00000000   80 1C 00 54 00 61 00 68  00 6F 00 6D 00 61 00 20   ...T.a.h.o.m.a. 
00000010   00 52 00 65 00 67 00 75  00 6C 00 61 00 72         .R.e.g.u.l.a.r  

00000000   80 1E 00 54 00 69 00 6D  00 65 00 73 00 20 00 4E   ...T.i.m.e.s. .N
00000010   00 65 00 77 00 20 00 52  00 6F 00 6D 00 61 00 6E   .e.w. .R.o.m.a.n

The win 98 era version s I found have these:

00000000   80 38 00 54 00 69 00 6D  00 65 00 73 00 20 00 4E   .8.T.i.m.e.s. .N
00000010   00 65 00 77 00 20 00 52  00 6F 00 6D 00 61 00 6E   .e.w. .R.o.m.a.n
00000020   00 20 00 52 00 65 00 67  00 75 00 6C 00 61 00 72   . .R.e.g.u.l.a.r
00000030   00 20 00 46 00 6F 00 6E  00 74                     . .F.o.n.t      

00000000   80 16 00 54 00 61 00 68  00 6F 00 6D 00 61 00 20   ...T.a.h.o.m.a. 
00000010   00 66 00 6F 00 6E 00 74                            .f.o.n.t        

The 2nd field of the earlier fonts also have this instead of the typography
url:

00000000   80 22 68 74 74 70 3A 2F  2F 77 77 77 2E 6D 69 63   ."http://www.mic
00000010   72 6F 73 6F 66 74 2E 63  6F 6D 2F 74 72 75 65 74   rosoft.com/truet
00000020   79 70 65 2F                                        ype/            

I looked at a few Adobe signed fonts that came with Acrobat Reader, and 
it just have one field there, which contains "www.adobe.com".

So usage of that field is not by any means formalized, but it is quite clear
they contain vendor info.

You don't need specialist tool - just doing 
$ strings /usr/share/fonts/myanmar3-unicode/mm3.ttf | grep -i microsoft | wc -l
32

i.e. the font contains 32 instances of the string "microsoft". (from the
signing certificates).

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