On Fri, Mar 14, 2014 at 06:18:49PM +0530, Mithun Kumar wrote:
> What is the difference between these two formats
The first contains a 1024 bit RSA-SHA1 public key, the second a
2048-bit key.
> Below is the ASN output using certuil tool.
>
> *Cert1:-*
>
> 0618: 30 0d ; SEQUENCE (d Bytes)
> 061a: | 06 09 ; OBJECT_ID (9 Bytes)
> 061c: | | 2a 86 48 86 f7 0d 01 01 05
> | | ; 1.2.840.113549.1.1.5 sha1RSA
> 0625: | 05 00 ; NULL (0 Bytes)
> 0627: 03 81 81 ; BIT_STRING (81 Bytes)
>
> *Cert2:-*
>
> 0780: 30 0d ; SEQUENCE (d Bytes)
> 0782: | 06 09 ; OBJECT_ID (9 Bytes)
> 0784: | | 2a 86 48 86 f7 0d 01 01 05
> | | ; 1.2.840.113549.1.1.5 sha1RSA
> 078d: | 05 00 ; NULL (0 Bytes)
> 078f: 03 82 01 01 ; BIT_STRING (101 Bytes)
> 0793: 00
>
> What does the highlighted values indicate? Any idea?
The signature algorithm name and key length. The byte counts are
reported in hex by the tool you're using, so 0x101 is 257 decimal,
and 0x81 is 129 decimal.
--
Viktor.
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