RE: DSA signed message of smime-example-07 document

["Jim Schaad" <jimsch@xxxxxxxxxx>]

These are going to be different values for DSA.  If you look at the
specifications of DSA you will notice that there is a random value (k)
which is used in the computation.

jim

> -----Original Message-----
> From: owner-ietf-smime-examples@xxxxxxxxxxxx 
> [mailto:owner-ietf-smime-examples@xxxxxxxxxxxx] On Behalf Of 
> Masui, Takanori
> Sent: Tuesday, November 27, 2001 11:27 PM
> To: ietf-smime-examples@xxxxxxx
> Subject: DSA signed message of smime-example-07 document
> 
> 
> 
> 
> I have a following question on this document.
> 
> 
> 5.1(Basic signed content,DSS) and 5.3(Basic signed content,detached
> content)
> are signed message which are signed by Alice's DSA private key.
> 
> 5.1 has internal content included in eConente, 
> which is "This is some sample content."
> 
> and
> 
> 5.3 has external content,
> which is "This is some sample content."
> 
> So the same content was signed by Alice in 5.1 and 5.2.
> 
> However,the signature value is different.
> These example has no signed attribute,
> then I expect they have same signature.
> 
> 5.1 signature
> 
>    881 04   48:           OCTET STRING, encapsulates {
>    883 30   45:               SEQUENCE {
>    885 02   20:                 INTEGER
>               :                   08 D0 45 7D 63 E1 39 EC 62 
> B0 30 C2 29
> AD 42 EA
>               :                   96 4F 91 86
>    907 02   21:                 INTEGER
>               :                   00 A6 86 EE 8A 7A 05 A7 E0 
> 07 E6 F9 88
> BF 93 FB
>               :                   96 4D 76 D3 92
> 	   			}
> 			}
> 5.3 signature
> 
>    849 04   48:           OCTET STRING, encapsulates {
>    851 30   44:               SEQUENCE {
>    853 02   20:                 INTEGER
>               :                   15 D0 DC EE FF D4 36 5B 93 
> 0D CF 69 3D
> 37 45 A0
>               :                   34 9A 63 35
>    875 02   20:                 INTEGER
>               :                   49 75 76 4C 33 00 0A AB 90 
> FD EF 9C 47
> 80 21 F1
>               :                   49 EA 02 15
> 				}
> 			  }
> 
> I wonder if I am misunderstanding.
> 
> Signature calculating process which I'm understading is following
> 
> "This is some sample content." ->digest(SHA1)->406a ec08 5279 
> ba6e 1602
> 2d9e 0629 c022 9687 dd48
> ->DSASign(AlicePrivKey)
> 
> Please clarify my understading.
> 
> Thank you in advance,
> 
> //Takanori Masui
>