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/*
* lib/krb5/krb/init_ctx.c
*
* Copyright 1994 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
* krb5_init_contex()
*/
#include "k5-int.h"
krb5_error_code INTERFACE
krb5_init_context(context)
krb5_context *context;
{
krb5_context ctx;
krb5_error_code retval;
*context = 0;
ctx = malloc(sizeof(struct _krb5_context));
if (!ctx)
return ENOMEM;
memset(ctx, 0, sizeof(struct _krb5_context));
ctx->magic = KV5M_CONTEXT;
/* Set the default encryption types, possible defined in krb5/conf */
if (krb5_set_default_in_tkt_etypes(ctx, NULL))
goto cleanup;
if (krb5_os_init_context(ctx))
goto cleanup;
*context = ctx;
return 0;
cleanup:
krb5_free_context(ctx);
return retval;
}
void
krb5_free_context(ctx)
krb5_context ctx;
{
krb5_os_free_context(ctx);
if (ctx->etypes);
free(ctx->etypes);
ctx->magic = 0;
free(ctx);
}
/*
* Set the desired default etypes, making sure they are valid.
*/
krb5_error_code
krb5_set_default_in_tkt_etypes(context, etypes)
krb5_context context;
const krb5_enctype *etypes;
{
krb5_enctype * new_etypes;
int i;
if (etypes) {
for (i = 0; etypes[i]; i++) {
if (!valid_etype(etypes[i]))
return KRB5_PROG_ETYPE_NOSUPP;
}
/* Now copy the default etypes into the context pointer */
if (new_etypes = (krb5_enctype *)malloc(sizeof(krb5_enctype) * i))
memcpy(new_etypes, etypes, sizeof(krb5_enctype) * i);
else
return ENOMEM;
} else {
i = 2;
/* Should reset the list to the runtime defaults */
if (new_etypes = (krb5_enctype *)malloc(sizeof(krb5_enctype) * i)) {
new_etypes[0] = ETYPE_DES_CBC_MD5;
new_etypes[1] = ETYPE_DES_CBC_CRC;
} else {
return ENOMEM;
}
}
if (context->etypes)
free(context->etypes);
context->etypes = new_etypes;
context->etype_count = i;
return 0;
}
krb5_error_code
krb5_get_default_in_tkt_etypes(context, etypes)
krb5_context context;
krb5_enctype **etypes;
{
krb5_enctype * old_etypes;
if (old_etypes = (krb5_enctype *)malloc(sizeof(krb5_enctype) *
(context->etype_count + 1))) {
memcpy(old_etypes, context->etypes, sizeof(krb5_enctype) *
context->etype_count);
old_etypes[context->etype_count] = 0;
} else {
return ENOMEM;
}
*etypes = old_etypes;
return 0;
}
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