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diff --git a/src/credentials/credentials_manager.h b/src/credentials/credentials_manager.h
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+++ b/src/credentials/credentials_manager.h
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+/*
+* Credentials Manager
+* (C) 2011,2012 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_CREDENTIALS_MANAGER_H__
+#define BOTAN_CREDENTIALS_MANAGER_H__
+
+#include <botan/x509cert.h>
+#include <botan/symkey.h>
+#include <string>
+
+namespace Botan {
+
+class BigInt;
+
+/**
+* Interface for a credentials manager.
+*
+* A type is a fairly static value that represents the general nature
+* of the transaction occuring. Currently used values are "tls-client"
+* and "tls-server". Context represents a hostname, email address,
+* username, or other identifier.
+*/
+class BOTAN_DLL Credentials_Manager
+   {
+   public:
+      virtual ~Credentials_Manager() {}
+
+      virtual std::string psk_identity_hint(const std::string& type,
+                                            const std::string& context);
+
+      /**
+      * @param identity_hint was passed by the server (but may be empty)
+      * @return the PSK identity we want to use
+      */
+      virtual std::string psk_identity(const std::string& type,
+                                       const std::string& context,
+                                       const std::string& identity_hint);
+
+      /**
+      * @return the PSK used for identity
+      */
+      virtual SymmetricKey psk(const std::string& type,
+                               const std::string& context,
+                               const std::string& identity);
+
+      /**
+      * @return identifier for client-side SRP auth, if available
+                for this type/context. Should return empty string
+                if password auth not desired/available.
+      */
+      virtual std::string srp_identifier(const std::string& type,
+                                         const std::string& context);
+
+      /**
+      * @param identifier specifies what identifier we want the
+      *        password for. This will be a value previously returned
+      *        by srp_identifier.
+      * @return password for client-side SRP auth, if available
+                for this identifier/type/context.
+      */
+      virtual std::string srp_password(const std::string& type,
+                                       const std::string& context,
+                                       const std::string& identifier);
+
+      /**
+      * Retrieve SRP verifier parameters
+      */
+      virtual bool srp_verifier(const std::string& type,
+                                const std::string& context,
+                                const std::string& identifier,
+                                BigInt& group_prime,
+                                BigInt& group_generator,
+                                BigInt& verifier,
+                                MemoryRegion<byte>& salt,
+                                bool generate_fake_on_unknown);
+
+      /**
+      * Return a cert chain we can use, ordered from leaf to root.
+      * Assumed that we can get the private key of the leaf with
+      * private_key_for
+      *
+      * @param cert_key_type is a set string representing the allowed
+      * key type ("RSA", "DSA", "ECDSA", etc) or empty if no
+      * preference.
+      */
+      virtual std::vector<X509_Certificate> cert_chain(
+         const std::vector<std::string>& cert_key_types,
+         const std::string& type,
+         const std::string& context);
+
+      /**
+      * Return a cert chain we can use, ordered from leaf to root.
+      * Assumed that we can get the private key of the leaf with
+      * private_key_for
+      *
+      * @param cert_key_type is a set string representing the allowed
+      * key type ("RSA", "DSA", "ECDSA", etc) or empty if no
+      * preference.
+      */
+      std::vector<X509_Certificate> cert_chain_single_type(
+         const std::string& cert_key_type,
+         const std::string& type,
+         const std::string& context);
+
+      /**
+      * Return a list of the certificates of CAs that we trust in this
+      * type/context.
+      */
+      virtual std::vector<X509_Certificate> trusted_certificate_authorities(
+         const std::string& type,
+         const std::string& context);
+
+      /**
+      * Check the certificate chain is valid up to a trusted root, and
+      * optionally (if hostname != "") that the hostname given is
+      * consistent with the leaf certificate.
+      *
+      * This function should throw an exception derived from
+      * std::exception with an informative what() result if the
+      * certificate chain cannot be verified.
+      */
+      virtual void verify_certificate_chain(
+         const std::string& type,
+         const std::string& hostname,
+         const std::vector<X509_Certificate>& cert_chain);
+
+      /**
+      * @return private key associated with this certificate if we should
+      *         use it with this context. cert was returned by cert_chain
+      * @note this object should retain ownership of the returned key;
+      *       it should not be deleted by the caller.
+      */
+      virtual Private_Key* private_key_for(const X509_Certificate& cert,
+                                           const std::string& type,
+                                           const std::string& context);
+   };
+
+}
+
+#endif