On Wednesday 29 August 2001 07:47 pm, you wrote:
first of all, thank you for responding. What you suggest is what I am doing.
What I find strange is that when I print out the P,Q and R values for the
key using openssl, and my java program, I get the following results :
------------
Java
-------------
p: c35f2efa 5bab8850 c8e4d2e4 a3d25207 2cf4a6fe 2a673aae 023dc01c
4e6ce849
cb130624 05421867 54fa193a 159e2276 801d5236 eac25c70 95a79b44 bdd7c66b
1bc34431 a6ab3538 7ee735d2 c7d73d6a 965c327d 1258b53f 6da7f0d1 a59a9240
c9207e70 e7310182 56020686 f24073ba 6676df5f 8edab5a9 1bc039de 40422747
q: 9d07aad9 33486f08 dfba4bc2 5ba7a611 01782903
g: 14ea2c90 e51e455a 99b1698f 4c371bd5 4893dfb4 21d1fde1 72885c13
e8acd371
716e4d31 b9a15184 2d485274 d1230c3d 2d1af640 d3992b1b f1bdac2b fe39652e
23ab6d61 f6217ede 05943784 4819e23b 78b5d459 09fc7939 44d11c30 c59fa476
083aa6bc 2abf60cf 25712ed3 426ae9ba aae5836f f67d9576 5298144c 845bb13c
--------------
openssl
--------------
key.cfg is the PKCS8 encoded DSA private key.
openssl pkcs8 -in key.cfg -inform DER -out DSA.DER -outform DER -nocrypt
-embed
openssl dsa -in DSA.DER -inform DER -text -modulus
P:
00:c3:5f:2e:fa:5b:ab:88:50:c8:e4:d2:e4:a3:d2:
52:07:2c:f4:a6:fe:2a:67:3a:ae:02:3d:c0:1c:4e:
6c:e8:49:cb:13:06:24:05:42:18:67:54:fa:19:3a:
15:9e:22:76:80:1d:52:36:ea:c2:5c:70:95:a7:9b:
44:bd:d7:c6:6b:1b:c3:44:31:a6:ab:35:38:7e:e7:
35:d2:c7:d7:3d:6a:96:5c:32:7d:12:58:b5:3f:6d:
a7:f0:d1:a5:9a:92:40:c9:20:7e:70:e7:31:01:82:
56:02:06:86:f2:40:73:ba:66:76:df:5f:8e:da:b5:
a9:1b:c0:39:de:40:42:27:47
Q:
00:9d:07:aa:d9:33:48:6f:08:df:ba:4b:c2:5b:a7:
a6:11:01:78:29:03
G:
14:ea:2c:90:e5:1e:45:5a:99:b1:69:8f:4c:37:1b:
d5:48:93:df:b4:21:d1:fd:e1:72:88:5c:13:e8:ac:
d3:71:71:6e:4d:31:b9:a1:51:84:2d:48:52:74:d1:
23:0c:3d:2d:1a:f6:40:d3:99:2b:1b:f1:bd:ac:2b:
fe:39:65:2e:23:ab:6d:61:f6:21:7e:de:05:94:37:
84:48:19:e2:3b:78:b5:d4:59:09:fc:79:39:44:d1:
1c:30:c5:9f:a4:76:08:3a:a6:bc:2a:bf:60:cf:25:
71:2e:d3:42:6a:e9:ba:aa:e5:83:6f:f6:7d:95:76:
52:98:14:4c:84:5b:b1:3c
Notice that the P and Q values for the openssl output start with '00'. Could
this be due to the fact that java does not support signed data types? When I
take the same key, and sign a SHA-1 hash, my java program fails the signature
verification, and my C program passes. The DSA signature is being verified
on a C based program.
thanks again for your help....
> Something like this should do the trick:
>
> byte[] encodedKey; // read from file
> PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(encodedKey);
> KeyFactory keyFactory = KeyFactory.getInstance("DSA");
> DSAPrivateKey privKey =
> (DSAPrivateKey)keyFactory.generatePrivate(keySpec);
>
> Regards,
>
> Steven
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Mark W. Webb
> Sent: Thursday, 30 August 2001 5:53 AM
> To: [EMAIL PROTECTED]
> Subject: reading in PKCS8 DSA priv key to java
>
>
> I know this may be off topic, but I wrote some code to create a DSA key
> pair,
> and matching certificate. The private key is stored in a file with PKCS8
> encoding. I want to be able to read the private key file into my java
> program. The certificate is used by a C based program.
>
> Can someone give me some help as to how and read the private key into my
> java
> program.
>
> Thank you.
--
Mark Webb
Software Engineer
Dolphin Technology
1300B Floyd Ave
Rome, NY 13440
Phone: (315) 334-4892 x222
Fax: (315) 339-4846
Email: [EMAIL PROTECTED]
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