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Code Issues Releases Wiki Activity

Use BN_hex2bn instead of custom BN_fromhex function

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This commit is contained in:
Ondřej Surý 2018-05-02 14:17:40 +02:00
parent 35d2dbb9f5
commit 8bf192b4d1
1 changed files with 14 additions and 37 deletions
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51
lib/dns/openssldh_link.c
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@ -50,6 +50,8 @@
#include "dst_openssl.h"
#include "dst_parse.h"
#define PRIME2 "02"
#define PRIME768 "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088" \
"A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25" \
"F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A63A3620FFFFFFFFFFFFFFFF"
@ -71,7 +73,7 @@
static isc_result_t openssldh_todns(const dst_key_t *key, isc_buffer_t *data);
static BIGNUM *bn2, *bn768, *bn1024, *bn1536;
static BIGNUM *bn2 = NULL, *bn768 = NULL, *bn1024 = NULL, *bn1536 = NULL;
#if !defined(HAVE_DH_GET0_KEY)
/*
@ -722,32 +724,6 @@ openssldh_parse(dst_key_t *key, isc_lex_t *lexer, dst_key_t *pub) {
return (ret);
}
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) < 1024U && strlen(str) % 2 == 0U);
for (i = 0; i < strlen(str); i += 2) {
const char *s;
unsigned int high, low;
s = strchr(hexdigits, tolower((unsigned char)str[i]));
RUNTIME_CHECK(s != NULL);
high = (unsigned int)(s - hexdigits);
s = strchr(hexdigits, tolower((unsigned char)str[i + 1]));
RUNTIME_CHECK(s != NULL);
low = (unsigned int)(s - hexdigits);
data[i/2] = (unsigned char)((high << 4) + low);
}
out = BN_bin2bn(data, strlen(str)/2, b);
RUNTIME_CHECK(out != NULL);
}
static void
openssldh_cleanup(void) {
BN_free(bn2);
@ -784,17 +760,18 @@ isc_result_t
dst__openssldh_init(dst_func_t **funcp) {
REQUIRE(funcp != NULL);
if (*funcp == NULL) {
bn2 = BN_new();
bn768 = BN_new();
bn1024 = BN_new();
bn1536 = BN_new();
if (bn2 == NULL || bn768 == NULL ||
bn1024 == NULL || bn1536 == NULL)
if (BN_hex2bn(&bn2, PRIME2) == 0 || bn2 == NULL) {
goto cleanup;
BN_set_word(bn2, 2);
BN_fromhex(bn768, PRIME768);
BN_fromhex(bn1024, PRIME1024);
BN_fromhex(bn1536, PRIME1536);
}
if (BN_hex2bn(&bn768, PRIME768) == 0 || bn768 == NULL) {
goto cleanup;
}
if (BN_hex2bn(&bn1024, PRIME1024) == 0 || bn1024 == NULL) {
goto cleanup;
}
if (BN_hex2bn(&bn1536, PRIME1536) == 0 || bn1536 == NULL) {
goto cleanup;
}
*funcp = &openssldh_functions;
}
return (ISC_R_SUCCESS);