IBM Computer Hardware 2 Manuale Utente Scaricare il pdf (Pagina 391)

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101

CCA Release 2.54

Figure B-21. RSA Public-Key Certificate(s) Signature Subsection

Offset

(Bytes)

Length

(Bytes)

Description

000 001 X'45', Signature Subsection Header

001 001 The version number (X'00')

002 002 Subsection length, 70+sss

004 001 Hashing algorithm identifier; X'01' signifies use of the SHA-1 hashing

algorithm

005 001 Signature formatting identifier; X'01' signifies use of the ISO 9796-1 process

006 064 Signature-key identifier; the key label of the key used to generate the

signature

070 sss The signature field

The signature is calculated on data that begins with the Signature Section

Identifier (X'40') through the byte immediately preceding this signature field.

Note: More than one Signature Subsection can be included in a Signature Section; this

accommodates the possibility of a self-signature as well as a device-key signature.

Note: See “Number Representation in PKA Key-Tokens” on page B-8.

Appendix B. Data Structures B-19

1 2 ... 386 387 388 389 390 391 392 393 394 395 396 ... 507 508

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IBM Computer Hardware 2 Manuale Utente Pagina 391

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