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Current Path: /usr/src/crypto/openssl/crypto/asn1

usr / src / crypto / openssl / crypto / asn1 /

📁 ..
📄 a_bitstr.c(5.34 KB)
📄 a_d2i_fp.c(6.33 KB)
📄 a_digest.c(1.52 KB)
📄 a_dup.c(1.51 KB)
📄 a_gentm.c(2.12 KB)
📄 a_i2d_fp.c(2.25 KB)
📄 a_int.c(16.55 KB)
📄 a_mbstr.c(9.55 KB)
📄 a_object.c(10.16 KB)
📄 a_octet.c(813 B)
📄 a_print.c(2.14 KB)
📄 a_sign.c(7.08 KB)
📄 a_strex.c(17.37 KB)
📄 a_strnid.c(5.95 KB)
📄 a_time.c(14.91 KB)
📄 a_type.c(3.51 KB)
📄 a_utctm.c(2.23 KB)
📄 a_utf8.c(5.89 KB)
📄 a_verify.c(4.92 KB)
📄 ameth_lib.c(14.51 KB)
📄 asn1_err.c(18.92 KB)
📄 asn1_gen.c(22.63 KB)
📄 asn1_item_list.c(1.06 KB)
📄 asn1_item_list.h(5.5 KB)
📄 asn1_lib.c(9.38 KB)
📄 asn1_local.h(3.27 KB)
📄 asn1_par.c(13 KB)
📄 asn_mime.c(27.92 KB)
📄 asn_moid.c(2.46 KB)
📄 asn_mstbl.c(3.43 KB)
📄 asn_pack.c(1.59 KB)
📄 bio_asn1.c(11.09 KB)
📄 bio_ndef.c(5.29 KB)
📄 build.info(837 B)
📄 charmap.h(1.41 KB)
📄 charmap.pl(3.58 KB)
📄 d2i_pr.c(3.64 KB)
📄 d2i_pu.c(2.01 KB)
📄 evp_asn1.c(2.89 KB)
📄 f_int.c(3.94 KB)
📄 f_string.c(3.44 KB)
📄 i2d_pr.c(1006 B)
📄 i2d_pu.c(1.05 KB)
📄 n_pkey.c(1.89 KB)
📄 nsseq.c(1.11 KB)
📄 p5_pbe.c(2.52 KB)
📄 p5_pbev2.c(6 KB)
📄 p5_scrypt.c(7.76 KB)
📄 p8_pkey.c(2.53 KB)
📄 standard_methods.h(1.35 KB)
📄 t_bitst.c(1.56 KB)
📄 t_pkey.c(2.52 KB)
📄 t_spki.c(1.75 KB)
📄 tasn_dec.c(36.99 KB)
📄 tasn_enc.c(18.86 KB)
📄 tasn_fre.c(5.34 KB)
📄 tasn_new.c(8.95 KB)
📄 tasn_prn.c(14.63 KB)
📄 tasn_scn.c(1.37 KB)
📄 tasn_typ.c(2.94 KB)
📄 tasn_utl.c(6.64 KB)
📄 tbl_standard.h(2.7 KB)
📄 x_algor.c(3.31 KB)
📄 x_bignum.c(4.05 KB)
📄 x_info.c(895 B)
📄 x_int64.c(7.83 KB)
📄 x_long.c(5.42 KB)
📄 x_pkey.c(1.12 KB)
📄 x_sig.c(1.05 KB)
📄 x_spki.c(961 B)
📄 x_val.c(636 B)

Editing: x_bignum.c

/*
 * Copyright 2000-2019 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/asn1t.h>
#include <openssl/bn.h>

/*
 * Custom primitive type for BIGNUM handling. This reads in an ASN1_INTEGER
 * as a BIGNUM directly. Currently it ignores the sign which isn't a problem
 * since all BIGNUMs used are non negative and anything that looks negative
 * is normally due to an encoding error.
 */

#define BN_SENSITIVE    1

static int bn_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
static int bn_secure_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
static void bn_free(ASN1_VALUE **pval, const ASN1_ITEM *it);

static int bn_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype,
                  const ASN1_ITEM *it);
static int bn_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
                  int utype, char *free_cont, const ASN1_ITEM *it);
static int bn_secure_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
                         int utype, char *free_cont, const ASN1_ITEM *it);
static int bn_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it,
                    int indent, const ASN1_PCTX *pctx);

static ASN1_PRIMITIVE_FUNCS bignum_pf = {
    NULL, 0,
    bn_new,
    bn_free,
    0,
    bn_c2i,
    bn_i2c,
    bn_print
};

static ASN1_PRIMITIVE_FUNCS cbignum_pf = {
    NULL, 0,
    bn_secure_new,
    bn_free,
    0,
    bn_secure_c2i,
    bn_i2c,
    bn_print
};

ASN1_ITEM_start(BIGNUM)
        ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &bignum_pf, 0, "BIGNUM"
ASN1_ITEM_end(BIGNUM)

ASN1_ITEM_start(CBIGNUM)
        ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &cbignum_pf, BN_SENSITIVE, "CBIGNUM"
ASN1_ITEM_end(CBIGNUM)

static int bn_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
    *pval = (ASN1_VALUE *)BN_new();
    if (*pval != NULL)
        return 1;
    else
        return 0;
}

static int bn_secure_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
    *pval = (ASN1_VALUE *)BN_secure_new();
    if (*pval != NULL)
        return 1;
    else
        return 0;
}

static void bn_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
    if (*pval == NULL)
        return;
    if (it->size & BN_SENSITIVE)
        BN_clear_free((BIGNUM *)*pval);
    else
        BN_free((BIGNUM *)*pval);
    *pval = NULL;
}

static int bn_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype,
                  const ASN1_ITEM *it)
{
    BIGNUM *bn;
    int pad;
    if (*pval == NULL)
        return -1;
    bn = (BIGNUM *)*pval;
    /* If MSB set in an octet we need a padding byte */
    if (BN_num_bits(bn) & 0x7)
        pad = 0;
    else
        pad = 1;
    if (cont) {
        if (pad)
            *cont++ = 0;
        BN_bn2bin(bn, cont);
    }
    return pad + BN_num_bytes(bn);
}

static int bn_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
                  int utype, char *free_cont, const ASN1_ITEM *it)
{
    BIGNUM *bn;

if (*pval == NULL && !bn_new(pval, it))
        return 0;
    bn = (BIGNUM *)*pval;
    if (!BN_bin2bn(cont, len, bn)) {
        bn_free(pval, it);
        return 0;
    }
    return 1;
}

static int bn_secure_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
                         int utype, char *free_cont, const ASN1_ITEM *it)
{
    int ret;
    BIGNUM *bn;

if (*pval == NULL && !bn_secure_new(pval, it))
        return 0;

ret = bn_c2i(pval, cont, len, utype, free_cont, it);
    if (!ret)
        return 0;

/* Set constant-time flag for all secure BIGNUMS */
    bn = (BIGNUM *)*pval;
    BN_set_flags(bn, BN_FLG_CONSTTIME);
    return ret;
}

static int bn_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it,
                    int indent, const ASN1_PCTX *pctx)
{
    if (!BN_print(out, *(BIGNUM **)pval))
        return 0;
    if (BIO_puts(out, "\n") <= 0)
        return 0;
    return 1;
}

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Editing: x_bignum.c

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