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Add krb5_storage_from_readonly_mem that is safe to use on

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const/readonly buffers (it doesn't support write).


git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@18948 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2006-11-07 23:02:53 +00:00
parent 9b4cecc20f
commit 0868717d3c
1 changed files with 31 additions and 0 deletions
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31
lib/krb5/store_mem.c
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@@ -64,6 +64,12 @@ mem_store(krb5_storage *sp, const void *data, size_t size)
return size; return size;
} }
static ssize_t
mem_no_store(krb5_storage *sp, const void *data, size_t size)
{
return -1;
}
static off_t static off_t
mem_seek(krb5_storage *sp, off_t offset, int whence) mem_seek(krb5_storage *sp, off_t offset, int whence)
{ {
@@ -117,3 +123,28 @@ krb5_storage_from_data(krb5_data *data)
{ {
return krb5_storage_from_mem(data->data, data->length); return krb5_storage_from_mem(data->data, data->length);
} }
krb5_storage * KRB5_LIB_FUNCTION
krb5_storage_from_readonly_mem(const void *buf, size_t len)
{
krb5_storage *sp = malloc(sizeof(krb5_storage));
mem_storage *s;
if(sp == NULL)
return NULL;
s = malloc(sizeof(*s));
if(s == NULL) {
free(sp);
return NULL;
}
sp->data = s;
sp->flags = 0;
sp->eof_code = HEIM_ERR_EOF;
s->base = rk_UNCONST(buf);
s->size = len;
s->ptr = rk_UNCONST(buf);
sp->fetch = mem_fetch;
sp->store = mem_no_store;
sp->seek = mem_seek;
sp->free = NULL;
return sp;
}