From aa4d426b4d3527d7e166df1a05058c9a4a0f6683 Mon Sep 17 00:00:00 2001 From: Wojtek Kosior Date: Fri, 30 Apr 2021 00:33:56 +0200 Subject: initial/final commit --- openssl-1.1.0h/crypto/asn1/x_bignum.c | 146 ++++++++++++++++++++++++++++++++++ 1 file changed, 146 insertions(+) create mode 100644 openssl-1.1.0h/crypto/asn1/x_bignum.c (limited to 'openssl-1.1.0h/crypto/asn1/x_bignum.c') diff --git a/openssl-1.1.0h/crypto/asn1/x_bignum.c b/openssl-1.1.0h/crypto/asn1/x_bignum.c new file mode 100644 index 0000000..da57e77 --- /dev/null +++ b/openssl-1.1.0h/crypto/asn1/x_bignum.c @@ -0,0 +1,146 @@ +/* + * Copyright 2000-2016 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 +#include "internal/cryptlib.h" +#include +#include + +/* + * 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) + 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) + 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) +{ + if (!*pval) + bn_secure_new(pval, it); + return bn_c2i(pval, cont, len, utype, free_cont, it); +} + +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; +} -- cgit v1.2.3