Changing configuration structure to enable multiple accounts.

This change enables using multiple wire plugins at the same time.
Also, we now distinguish between the wire plugin (i.e. EBICS or
taler_bank) and the wire method (i.e. SEPA or x-taler-bank) that
the wire plugin is implementing.  The "taler-bank" wire method
was renamed from "test" to "x-taler-bank".

This also changes the format of the /wire response of the exchange,
as we now need to return multiple accounts.  Note that wire fees
are specified per wire method, not per wire account.

taler-exchange-keyup now automatically signs all of the /wire
responses in the location specified by the configuration.

Account identification in wire plugins was changed to use
payto://-URLs instead of method-specific JSON fields.  Signing
and validation of /wire responses was moved from each wire
plugin to a generic validation method in libtalerutil (crypto)
or libtalerjson (for JSON-formatted inputs).
Convenience methods were added to generate JSON for wire accounts
(salting, signing).

Various section and option names were adjusted to streamline the
configuration and make it more consistent overall.  Documentation
was updated as well.

1 files changed, 59 insertions, 0 deletions

diff --git a/src/include/taler_json_lib.h b/src/include/taler_json_lib.h
index 6d019ecca..0504ddfb8 100644
--- a/src/include/taler_json_lib.h
+++ b/src/include/taler_json_lib.h
@@ -126,6 +126,65 @@ enum TALER_ErrorCode
 TALER_JSON_get_error_code (const json_t *json);
 
 
+/* **************** /wire account offline signing **************** */
+
+/**
+ * Compute the hash of the given wire details.   The resulting
+ * hash is what is put into the contract.
+ *
+ * @param wire_s wire details to hash
+ * @param hc[out] set to the hash
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR if @a wire_s is malformed
+ */
+int
+TALER_JSON_wire_signature_hash (const json_t *wire_s,
+                                struct GNUNET_HashCode *hc);
+
+/**
+ * Check the signature in @a wire_s.
+ *
+ * @param wire_s signed wire information of an exchange
+ * @param master_pub master public key of the exchange
+ * @return #GNUNET_OK if signature is valid
+ */
+int
+TALER_JSON_wire_signature_check (const json_t *wire_s,
+                                 const struct TALER_MasterPublicKeyP *master_pub);
+
+
+/**
+ * Create a signed wire statement for the given account.
+ *
+ * @param payto_url account specification
+ * @param master_priv private key to sign with, NULL to not sign
+ */
+json_t *
+TALER_JSON_wire_signature_make (const char *payto_url,
+                                const struct TALER_MasterPrivateKeyP *master_priv);
+
+
+/**
+ * Obtain the wire method associated with the given
+ * wire account details.  @a wire_s must contain a payto://-URL
+ * under 'url'.
+ *
+ * @return NULL on error
+ */
+char *
+TALER_JSON_wire_to_method (const json_t *wire_s);
+
+
+/**
+ * Obtain the payto://-URL associated with the given
+ * wire account details.  @a wire_s must contain a payto://-URL
+ * under 'url'.
+ *
+ * @return NULL on error
+ */
+char *
+TALER_JSON_wire_to_payto (const json_t *wire_s);
+
+
 #endif /* TALER_JSON_LIB_H_ */
 
 /* End of taler_json_lib.h */