Re: block padding formats

Hello,

Will somebody give me the explanation of the padding scheme
refered by OIW ?
Help is appreciated.

Thank you,

Jun Yoshitake
Mitsubishi Electric Corp.

Russ Housley wrote:

> Petra:
>
> We discovered that the OIW OID was not used with PKCS#1 padding.  It
> referenced another padding scheme.  We founf that RSA Labs had assigned an
> OID that used PKCS#1 padding, the technique that we intended alll along.
>
> Russ
>
> At 11:46 AM 8/18/98 +0200, Petra Gl\xF6ckner wrote:
> >Hello,
> >
> >reading draft-ietf-pkix-ipki-part1-07 and draft-ietf-pkix-ipki-part1-09
> >I noticed the following difference:
> >
> >draft-ietf-pkix-ipki-part1-07 states:
> >> The signature algorithm with SHA-1 and the RSA encryption algorithm
> >> is defined in by the OSI Interoperability Workshop in [OIW]. Padding
> >> conventions described in PKCS #1, section 8.1, must be used.  As
> >> defined in [OIW], the ASN.1 object identifier used to identify this
> >> signature algorithm is:
> >>
> >>         sha1WithRSASignature OBJECT IDENTIFIER  ::=  {
> >>             iso(1) identified-organization(3) oiw(14)
> >>             secsig(3) algorithm(2) 29  }
> >>
> >
> >draft-ietf-pkix-ipki-part1-09 states:
> >> The signature algorithm with SHA-1 and the RSA encryption algorithm
> >> is implemented using the padding and encoding conventions described
> >> in PKCS #1 [RFC 2313]. The message digest is computed using the SHA-1
> >> hash algorithm.  The ASN.1 object identifier used to identify this
> >> signature algorithm is:
> >>
> >>         sha-1WithRSAEncryption OBJECT IDENTIFIER  ::=  {
> >>             iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1)
> >>             pkcs-1(1) 5  }
> >
> >
> >Why did you replace the OIW ObjId with the RSA ObjId ? Is it because
> >the OIW ObjId 1.3.14.3.2.29 doesn't identify PKCS #1 padding but
> >9796-1 padding ? Has the draft-ietf-pkix-ipki-part1-07 been wrong at
> >this point ?
> >
> >Best regards - Petra Gl\xF6ckner
> >
> >