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  3. When The Certificate Is Export and Remove, The Software Does Not Send Issuer In X.509 V3 DER Format

When the certificate is export and remove, the software does not send issuer in X.509 v3 DER format

By li301597 , 27 April, 2023
Forums
DLMSDirector

When the certificate is export and remove, the software does not send issuer in X.509 v3 DER format

Profile picture for user Kurumi

Kurumi

3 years 4 months ago

Hi, I checked this and the…

Hi,

I checked this and the certificate issuer is the same as described in the Blue Book. What is different from what you expect?

BR,
Mikko

li301597

3 years 4 months ago

HI,Kurumi It may not seem…

HI,Kurumi

It may not seem obvious from the blue book, but here are the data frames sent by CTT and gurux for comparison.

CTT:
method7:
7EA068030392182BE6E600C301C1004000002B0000FF070102021601020209040202287C0941303F310B3009060355040613024348311E301C060355040A0C15444C4D532055534552204153534F43494154494F4E3110300E06035504030C07526F6F745F434174B97E
method8:
7EA0680303D42A0CE6E600C301C1004000002B0000FF080102021601020209040202287B0941303F310B3009060355040613024348311E301C060355040A0C15444C4D532055534552204153534F43494154494F4E3110300E06035504030C07526F6F745F4341C7387E

Gurux:
method7:
7E A0 6A 03 03 30 76 94 E6 E6 00 CB 5C 11 00 01 86 A8 C3 01 C1 00 40 00 00 2B 00 00 FF 07 01 02 02 16 01 02 02 09 03 0F 5C 64 09 31 43 4E 3D 52 6F 6F 74 20 43 41 20 32 35 36 2C 20 4F 3D 47 75 72 75 78 20 53 65 63 75 72 69 74 79 2C 20 4C 3D 54 61 6D 70 65 72 65 2C 20 43 3D 46 49 B4 5E B3 D0 E7 60 DF 08 C7 7A 20 1D D5 6A 7E
method8:
7E A0 6A 03 03 1E 0A 5C E6 E6 00 CB 5C 11 00 01 86 A7 C3 01 C1 00 40 00 00 2B 00 00 FF 08 01 02 02 16 01 02 02 09 03 0F 5C 46 09 31 43 4E 3D 52 6F 6F 74 20 43 41 20 32 35 36 2C 20 4F 3D 47 75 72 75 78 20 53 65 63 75 72 69 74 79 2C 20 4C 3D 54 61 6D 70 65 72 65 2C 20 43 3D 46 49 C8 13 8B 68 6D F4 E1 66 59 E3 3D 8A 9B 48 7E

Profile picture for user Kurumi

Kurumi

3 years 4 months ago

Hi, I understand your point…

Hi,

I understand your point. DLMS standard doesn't define the issuer's content. It's only an octet string.

I verify this from DLMS UA.

BR,
Mikko

Profile picture for user Kurumi

Kurumi

3 years 3 months ago

Hi, This seems to be a…

Hi,

This seems to be a problem. Our clients have meters that have CTT certificate and they are export sertificate in the same way as it's implemented in Gurux library.

I need some time to think how to solve this.

BR,
Mikko

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