July 2002
Intermediate to advanced
560 pages
11h 10m
English
Content preview from Secure XML: The New Syntax for Signatures and Encryption
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18.4. Signature Algorithms
Signature algorithm identifiers appear as the Algorithm attribute of SignatureMethod elements, as shown in Figure 18-3. They take two implicit parameters: their keying material and the octet stream output by CanonicalizationMethod. MAC and signature algorithms are syntactically identical, but a signature implies public key cryptography.
18.4.1. DSA
DSA Identifier:
http://www.w3.org/2000/09/xmldsig#dsa-sha1
The DSA algorithm [DSS] is mandatory to implement for XML Digital Signature applications. It takes no explicit parameters. An example of a DSA SignatureMethod element follows:
<SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#dsa-sha1"/>
The output of the DSA algorithm is a pair of integers usually ...
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