security-and-privacy/gnupg
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Restructured the RNG source and add support for loadable

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random modules.
This commit is contained in:
Werner Koch 1998-11-25 11:52:41 +00:00
parent 710d2e351b
commit 2e494682b6
11 changed files with 1101 additions and 281 deletions
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93
cipher/dynload.c
View file

@ -39,6 +39,7 @@
typedef struct ext_list {
struct ext_list *next;
int internal;
#ifdef HAVE_DL_DLOPEN
void *handle; /* handle from dlopen() */
#else
@ -83,7 +84,7 @@ static int dld_available;
void
register_cipher_extension( const char *mainpgm, const char *fname )
{
EXTLIST r, el;
EXTLIST r, el, intex;
char *p, *pe;
#ifdef HAVE_DLD_DLD_LINK
@ -114,13 +115,53 @@ register_cipher_extension( const char *mainpgm, const char *fname )
el->hintstr = NULL;
/* check that it is not already registered */
for(r = extensions; r; r = r->next )
intex = NULL;
for(r = extensions; r; r = r->next ) {
if( !compare_filenames(r->name, el->name) ) {
log_info("extension '%s' already registered\n", el->name );
m_free(el);
return;
}
else if( r->internal )
intex = r;
}
/* and register */
/* we put them after the internal extension modules */
/* this is so that the external modules do not get loaded */
/* as soon as the internal modules are requested */
if( intex ) {
el->next = intex->next;
intex->next = el;
}
else {
el->next = extensions;
extensions = el;
}
}
void
register_internal_cipher_extension(
const char *module_id,
void * (*enumfunc)(int, int*, int*, int*)
)
{
EXTLIST r, el;
el = m_alloc_clear( sizeof *el + strlen(module_id) );
strcpy(el->name, module_id );
el->internal = 1;
/* check that it is not already registered */
for(r = extensions; r; r = r->next ) {
if( !compare_filenames(r->name, el->name) ) {
log_info("extension '%s' already registered\n", el->name );
m_free(el);
return;
}
}
/* and register */
el->enumfunc = enumfunc;
el->handle = (void*)1;
el->next = extensions;
extensions = el;
}
@ -455,3 +496,51 @@ enum_gnupgext_pubkeys( void **enum_context, int *algo,
return NULL;
}
int (*
dynload_getfnc_gather_random())(byte*, size_t*, int)
{
EXTLIST r;
void *sym;
for( r = extensions; r; r = r->next ) {
int seq, class, vers;
if( r->failed )
continue;
if( !r->handle && load_extension(r) )
continue;
seq = 0;
while( (sym = (*r->enumfunc)(40, &seq, &class, &vers)) ) {
if( vers != 1 || class != 40 )
continue;
return (int (*)(byte*, size_t*, int))sym;
}
}
return NULL;
}
void (*
dynload_getfnc_fast_random_poll())( void (*)(const void*, size_t, int))
{
EXTLIST r;
void *sym;
for( r = extensions; r; r = r->next ) {
int seq, class, vers;
if( r->failed )
continue;
if( !r->handle && load_extension(r) )
continue;
seq = 0;
while( (sym = (*r->enumfunc)(41, &seq, &class, &vers)) ) {
if( vers != 1 || class != 41 )
continue;
return (void (*)( void (*)(const void*, size_t, int)))sym;
}
}
return NULL;
}