/* $OpenBSD: x_long.c,v 1.23 2026/01/02 08:03:02 tb Exp $ */ /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL * project 2000. */ /* ==================================================================== * Copyright (c) 2000 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * licensing@OpenSSL.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ #include <limits.h> #include <string.h> #include <openssl/asn1t.h> #include <openssl/bn.h> #include "asn1_local.h" #include "err_local.h" /* * Custom primitive type for long handling. This converts between an * ASN1_INTEGER and a long directly. */ /* Used with ASN1 LONG type: if a long is set to this it is omitted */ #define ASN1_LONG_UNDEF 0x7fffffffL static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it); static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it); static void long_clear(ASN1_VALUE **pval, const ASN1_ITEM *it); static int long_i2c(ASN1_VALUE **pval, unsigned char *content, int *putype, const ASN1_ITEM *it); static int long_c2i(ASN1_VALUE **pval, const unsigned char *content, int len, int utype, char *free_content, const ASN1_ITEM *it); static int long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, int indent, const ASN1_PCTX *pctx); static const ASN1_PRIMITIVE_FUNCS long_pf = { .app_data = NULL, .flags = 0, .prim_new = long_new, .prim_free = long_free, .prim_clear = long_clear, .prim_c2i = long_c2i, .prim_i2c = long_i2c, .prim_print = long_print, }; const ASN1_ITEM LONG_it = { .itype = ASN1_ITYPE_PRIMITIVE, .utype = V_ASN1_INTEGER, .templates = NULL, .tcount = 0, .funcs = &long_pf, .size = ASN1_LONG_UNDEF, .sname = "LONG", }; LCRYPTO_ALIAS(LONG_it); const ASN1_ITEM ZLONG_it = { .itype = ASN1_ITYPE_PRIMITIVE, .utype = V_ASN1_INTEGER, .templates = NULL, .tcount = 0, .funcs = &long_pf, .size = 0, .sname = "ZLONG", }; LCRYPTO_ALIAS(ZLONG_it); static void long_get(ASN1_VALUE **pval, long *out_val) { memcpy(out_val, pval, sizeof(long)); } static void long_set(ASN1_VALUE **pval, long val) { memcpy(pval, &val, sizeof(long)); } static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it) { long_clear(pval, it); return 1; } static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it) { long_clear(pval, it); } static void long_clear(ASN1_VALUE **pval, const ASN1_ITEM *it) { /* Zero value. */ long_set(pval, it->size); } static int long_i2c(ASN1_VALUE **pval, unsigned char *content, int *putype, const ASN1_ITEM *it) { ASN1_INTEGER *aint; uint8_t **pp = NULL; long val; int ret = 0; long_get(pval, &val); /* * Omit this field if it has the zero value for this type (stored * in the overloaded it->size field) - asn1_i2d_ex_primitive() * specifically checks for a -1 return value. */ if (val == it->size) return -1; if ((aint = ASN1_INTEGER_new()) == NULL) goto err; if (!ASN1_INTEGER_set_int64(aint, (int64_t)val)) goto err; if (content != NULL) pp = &content; ret = i2c_ASN1_INTEGER(aint, pp); err: ASN1_INTEGER_free(aint); return ret; } static int long_c2i(ASN1_VALUE **pval, const unsigned char *content, int len, int utype, char *free_content, const ASN1_ITEM *it) { ASN1_INTEGER *aint = NULL; const uint8_t **pp = NULL; int64_t val = 0; int ret = 0; /* * The original long_i2c() mishandled 0 values and encoded them as * content with zero length, rather than a single zero byte. Permit * zero length content here for backwards compatibility. */ if (len != 0) { if (content != NULL) pp = &content; if (!c2i_ASN1_INTEGER(&aint, pp, len)) goto err; if (!ASN1_INTEGER_get_int64(&val, aint)) goto err; } if (val < LONG_MIN || val > LONG_MAX) { ASN1error(ASN1_R_INTEGER_TOO_LARGE_FOR_LONG); goto err; } /* * The zero value for this type (stored in the overloaded it->size * field) is considered to be invalid. */ if (val == (int64_t)it->size) { ASN1error(ASN1_R_INTEGER_TOO_LARGE_FOR_LONG); goto err; } long_set(pval, (long)val); ret = 1; err: ASN1_INTEGER_free(aint); return ret; } static int long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, int indent, const ASN1_PCTX *pctx) { long val; long_get(pval, &val); if (BIO_printf(out, "%ld\n", val) <= 0) return 0; return 1; }
