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POWhat is the alternate to PasswordDigest when clear text password is not stored on the web-service producer?
 

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  1. POWhat is the alternate to PasswordDigest when clear text password is not stored on the web-service producer?
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    <p><strong>Scenario:</strong> </p> <p>Web-service producer have only SHA-1 hash of passwords stored in database. We need to authenticate Web-service users using User Name/Password combination.</p> <hr> <p><strong><a href="http://docs.oasis-open.org/wss/v1.1/wss-v1.1-spec-os-UsernameTokenProfile.pdf" rel="nofollow noreferrer">Web Services Security UsernameToken Profile</a></strong> allows us to add soap headers for this purpose:</p> <blockquote> <p>The element is introduced in the WSS: SOAP Message Security documents as a way of providing a username.</p> <p>Within element, a element may be specified. Passwords of type PasswordText and PasswordDigest are not limited to actual passwords, although this is a common case. <a href="http://docs.oasis-open.org/wss/v1.1/wss-v1.1-spec-os-UsernameTokenProfile.pdf" rel="nofollow noreferrer">(146-151)</a></p> </blockquote> <p>PasswordText password type means that password is sent over the wire as plain text which is a security issue if we are not using Transport Level Security mechanisms. PasswordDigest avoids sending plain text passwords and sends a hash. But to avoid replay attack (i-e attacker using wiretap to capture the hashed password and resend it with another request) the PasswordDigest adds a timestamp and a random number to password before computing the hash. This addition results in following restriction:</p> <blockquote> <p>Note that PasswordDigest can only be used if the plain text password (or password equivalent) is available to both the requestor and the recipient. <a href="http://docs.oasis-open.org/wss/v1.1/wss-v1.1-spec-os-UsernameTokenProfile.pdf" rel="nofollow noreferrer">(196-197)</a></p> </blockquote> <hr> <p>But in our case we do not have plain text password. My question is: what alternates do we have other that to make plain text passwords available on the server?</p>
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    1. USTahir Akhtar
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