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DH constants are mostly statically allocated now

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This commit is contained in:
Brian Wellington
1999-10-27 20:46:33 +00:00
parent 24e49b2133
commit 904a34b853
1 changed files with 55 additions and 28 deletions
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83
lib/dns/sec/dst/openssldh_link.c
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@@ -19,7 +19,7 @@
/*
* Principal Author: Brian Wellington
* $Id: openssldh_link.c,v 1.4 1999/10/20 22:14:14 bwelling Exp $
* $Id: openssldh_link.c,v 1.5 1999/10/27 20:46:33 bwelling Exp $
*/
#include <config.h>
@@ -29,9 +29,11 @@
#include <stdlib.h>
#include <string.h>
#include <memory.h>
#include <ctype.h>
#include <isc/assertions.h>
#include <isc/buffer.h>
#include <isc/error.h>
#include <isc/int.h>
#include <isc/region.h>
@@ -71,8 +73,9 @@ static dst_result_t dst_openssldh_from_file(dst_key_t *key,
static void uint16_toregion(isc_uint16_t val, isc_region_t *region);
static isc_uint16_t uint16_fromregion(isc_region_t *region);
static void BN_fromhex(BIGNUM *b, const char *str);
static BIGNUM *bn2, *bn768, *bn1024;
static BIGNUM bn2, bn768, bn1024;
/*
* dst_s_openssldh_init()
@@ -98,13 +101,12 @@ dst_s_openssldh_init()
openssldh_functions.from_file = dst_openssldh_from_file;
CRYPTO_set_mem_functions(dst_mem_alloc, dst_mem_realloc, dst_mem_free);
/* BEW - should check for NULL here... */
bn2 = BN_new();
bn768 = BN_new();
bn1024 = BN_new();
BN_set_word(bn2, 2);
BN_hex2bn(&bn768, PRIME768);
BN_hex2bn(&bn1024, PRIME1024);
BN_init(&bn2);
BN_init(&bn768);
BN_init(&bn1024);
BN_set_word(&bn2, 2);
BN_fromhex(&bn768, PRIME768);
BN_fromhex(&bn1024, PRIME1024);
}
/*
@@ -183,7 +185,7 @@ dst_openssldh_to_dns(const dst_key_t *key, isc_buffer_t *data) {
isc_buffer_available(data, &r);
if (dh->g == bn2 && (dh->p == bn768 || dh->p == bn1024)) {
if (dh->g == &bn2 && (dh->p == &bn768 || dh->p == &bn1024)) {
plen = 1;
glen = 0;
}
@@ -198,7 +200,7 @@ dst_openssldh_to_dns(const dst_key_t *key, isc_buffer_t *data) {
uint16_toregion(plen, &r);
if (plen == 1) {
if (dh->p == bn768)
if (dh->p == &bn768)
*r.base = 1;
else
*r.base = 2;
@@ -275,10 +277,10 @@ dst_openssldh_from_dns(dst_key_t *key, isc_buffer_t *data, isc_mem_t *mctx) {
special = uint16_fromregion(&r);
switch (special) {
case 1:
dh->p = bn768;
dh->p = &bn768;
break;
case 2:
dh->p = bn1024;
dh->p = &bn1024;
break;
default:
DH_free(dh);
@@ -306,12 +308,12 @@ dst_openssldh_from_dns(dst_key_t *key, isc_buffer_t *data, isc_mem_t *mctx) {
}
if (special != 0) {
if (glen == 0)
dh->g = bn2;
dh->g = &bn2;
else {
dh->g = BN_bin2bn(r.base, glen, NULL);
if (BN_cmp(dh->g, bn2) == 0) {
if (BN_cmp(dh->g, &bn2) == 0) {
BN_free(dh->g);
dh->g = bn2;
dh->g = &bn2;
}
else {
DH_free(dh);
@@ -465,19 +467,19 @@ dst_openssldh_from_file(dst_key_t *key, const isc_uint16_t id, isc_mem_t *mctx)
key->key_size = BN_num_bits(dh->p);
if ((key->key_size == 768 || key->key_size == 1024) &&
BN_cmp(dh->g, bn2) == 0)
BN_cmp(dh->g, &bn2) == 0)
{
if (key->key_size == 768 && BN_cmp(dh->p, bn768) == 0) {
if (key->key_size == 768 && BN_cmp(dh->p, &bn768) == 0) {
BN_free(dh->p);
BN_free(dh->g);
dh->p = bn768;
dh->g = bn2;
dh->p = &bn768;
dh->g = &bn2;
}
else if (key->key_size == 1024 && BN_cmp(dh->p, bn1024) == 0) {
else if (key->key_size == 1024 && BN_cmp(dh->p, &bn1024) == 0) {
BN_free(dh->p);
BN_free(dh->g);
dh->p = bn1024;
dh->g = bn2;
dh->p = &bn1024;
dh->g = &bn2;
}
}
isc_buffer_init(&dns, dns_array, sizeof(dns_array),
@@ -513,9 +515,9 @@ dst_openssldh_destroy(void *key, isc_mem_t *mctx) {
mctx = mctx; /* make the compiler happy */
if (dh->p == bn768 || dh->p == bn1024)
if (dh->p == &bn768 || dh->p == &bn1024)
dh->p = NULL;
if (dh->g == bn2)
if (dh->g == &bn2)
dh->g = NULL;
DH_free(dh);
}
@@ -548,10 +550,10 @@ dst_openssldh_generate(dst_key_t *key, int generator, isc_mem_t *mctx) {
if (dh == NULL)
return (ISC_R_NOMEMORY);
if (key->key_size == 768)
dh->p = bn768;
dh->p = &bn768;
else
dh->p = bn1024;
dh->g = bn2;
dh->p = &bn1024;
dh->g = &bn2;
}
else
generator = 2;
@@ -663,5 +665,30 @@ uint16_fromregion(isc_region_t *region) {
return (val);
}
static void
BN_fromhex(BIGNUM *b, const char *str) {
static const char hexdigits[] = "0123456789abcdef";
unsigned char data[512];
unsigned int i;
BIGNUM *out;
RUNTIME_CHECK(strlen(str) < 1024 && strlen(str) % 2 == 0);
for (i = 0; i < strlen(str); i += 2) {
char *s;
unsigned int high, low;
s = strchr(hexdigits, tolower(str[i]));
RUNTIME_CHECK(s != NULL);
high = s - hexdigits;
s = strchr(hexdigits, tolower(str[i + 1]));
RUNTIME_CHECK(s != NULL);
low = s - hexdigits;
data[i/2] = (unsigned char)((high << 4) + low);
}
out = BN_bin2bn(data, strlen(str)/2, b);
RUNTIME_CHECK(out != NULL);
}
#endif