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sasl_auxprop(3)                 SASL man pages                 sasl_auxprop(3)

NAME
       sasl_auxprop - How to work with SASL auxiliary properties

SYNOPSIS
       #include <sasl/prop.h>

       struct propctx *prop_new(unsigned estimate)

       int prop_dup(struct propctx *src_ctx,
                    struct propctx *dst_ctx)

       int prop_request(struct propctx *ctx,
                        const char **names)

       const struct propval *prop_get(struct propctx *ctx)

       int prop_getnames(struct propctx *ctx, const char **names,
                         struct porpval *vals)

       void prop_clear(struct propctx *ctx, int requests)

       void prop_erase(struct propctx *ctx, const char *name)

       void prop_dispose(struct propctx **ctx)

       int prop_format(struct propctx *ctx, const char *sep, int seplen,
                       char *outbuf, unsigned outmax, unsigned *outlen)

       int prop_set(struct propctx *ctx, const char *name,
                    const char *value, int vallen)

       int prop_setvals(struct propctx *ctx, const char *name,
                        const char **values)

DESCRIPTION
       SASL  auxiliary  properties are used to obtain properties from external
       sources during the authentication process.  For  example,  a  mechanism
       might need to query an LDAP server to obtain the authentication secret.
       The application probably needs other information from  there  as  well,
       such as home directory or UID.  The auxiliary property interface allows
       the two to cooperate, and only results in a single  query  against  the
       LDAP server (or other property sources).

       Property  lookups  take  place  directly  after  user  canonicalization
       occurs.  Therefore, all requests should be registered with  he  context
       before  that time.  Note that requests can also be registered using the
       sasl_auxprop_request(3) function.  Most of the functions listed  below,
       however,  require  a  property context which can be obtained by calling
       sasl_auxprop_getctx(3).

API Description
       struct propctx *prop_new(unsigned estimate)
               Create a new property context.  Probably unnecessary for appli-
               cation developers to call this at any point.

               estimate is the estimate of storage needed total for requests &
               responses.  A value of 0 will imply the library default.

       int prop_dup(struct propctx *src_ctx, struct propctx *dst_ctx)

               Duplicate a given property context.

       int prop_request(struct propctx *ctx, const char **names)

               Add properties to the request list of a given context.

               names is the NULL-terminated array of property names, and  must
               persist  until  the requests are cleared or the context is dis-
               posed of with a call to prop_dispose.

       const struct propval *prop_get(struct propctx *ctx)

               Returns a NULL-terminated array  of  struct  propval  from  the
               given context.

       int prop_getnames(struct propctx *ctx, const char **names,
                                 struct porpval *vals)

               Fill in a (provided) array of struct propval based on a list of
               property names.  This implies that the vals array is  at  least
               as  long  as  the names array. The values that are filled in by
               this call persist until next call to prop_request,  prop_clear,
               or prop_dispose on context.  If a name specified here was never
               requested, that its associated values  entry  will  be  set  to
               NULL.

               Returns  number  of  matching  properties that were found, or a
               SASL error code.

       void prop_clear(struct propctx *ctx, int requests)

               Clear values and optionally requests from a property context.

               requests is 1 if the requests should be cleared, 0 otherwise.

       void prop_erase(struct propctx *ctx, const char *name)

               Securely erase the value of a property.

               name is the name of the property to erase.

       void prop_dispose(struct propctx **ctx)

               Disposes of a property context and NULLifys the pointer.

       int prop_format(struct propctx *ctx, const char *sep, int seplen,
                               char   *outbuf,   unsigned   outmax,   unsigned
               *outlen)

               Format  the  requested  property names into a string.  This not
               intended for use by the application (only by auxprop  plugins).

               sep Is the separator to use for the string

               outbuf Is the caller-allocated buffer of length outmax that the
               resulting string will be placed in (including NUL  terminator).

               outlen  if  non-NULL,  will contain the length of the resulting
               string (excluding NUL terminator).

       int prop_set(struct propctx *ctx, const char *name, const char *value,
                            int vallen)

               Adds a property value to the context.  This is intended for use
               by auxprop plugins only.

               name  is  the name of the property to receive the new value, or
               NULL, which implies that the value will be added  to  the  same
               property as the last call to either prop_set or prop_setvals.

               value is a value for the property of length vallen

       int  prop_setvals(struct  propctx  *ctx,  const  char *name, const char
       **values)

               Adds  multiple  values  to a single property.  This is intended
               for use by auxprop plugins only.

               name has the same meaning as in prop_set

               values are a NULL-terminated array of values to  be  added  the
               property.

RETURN VALUE
       The property functions that return an int return SASL error codes.  See
       sasl_errors(3).  Those that return pointers will return a valid pointer
       on success, or NULL on any error.

CONFORMING TO
       RFC 2222

SEE ALSO
       sasl(3),     sasl_errors(3),     sasl_auxprop_request(3),     sasl_aux-
       prop_getctx(3)

SASL                             10 July 2001                  sasl_auxprop(3)

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