| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * This package is an SSL implementation written |
| * by Eric Young (eay@cryptsoft.com). |
| * The implementation was written so as to conform with Netscapes SSL. |
| * |
| * This library is free for commercial and non-commercial use as long as |
| * the following conditions are aheared to. The following conditions |
| * apply to all code found in this distribution, be it the RC4, RSA, |
| * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| * included with this distribution is covered by the same copyright terms |
| * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| * |
| * Copyright remains Eric Young's, and as such any Copyright notices in |
| * the code are not to be removed. |
| * If this package is used in a product, Eric Young should be given attribution |
| * as the author of the parts of the library used. |
| * This can be in the form of a textual message at program startup or |
| * in documentation (online or textual) provided with the package. |
| * |
| * 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 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 acknowledgement: |
| * "This product includes cryptographic software written by |
| * Eric Young (eay@cryptsoft.com)" |
| * The word 'cryptographic' can be left out if the rouines from the library |
| * being used are not cryptographic related :-). |
| * 4. If you include any Windows specific code (or a derivative thereof) from |
| * the apps directory (application code) you must include an acknowledgement: |
| * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| * ANY EXPRESS 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 AUTHOR OR 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. |
| * |
| * The licence and distribution terms for any publically available version or |
| * derivative of this code cannot be changed. i.e. this code cannot simply be |
| * copied and put under another distribution licence |
| * [including the GNU Public Licence.] */ |
| |
| #include <openssl/asn1.h> |
| |
| #include <string.h> |
| |
| #include <openssl/asn1t.h> |
| #include <openssl/bn.h> |
| #include <openssl/err.h> |
| #include <openssl/mem.h> |
| |
| #include "../internal.h" |
| |
| |
| /* |
| * Custom primitive type for long handling. This converts between an |
| * ASN1_INTEGER and a long directly. |
| */ |
| |
| static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it); |
| static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it); |
| |
| static int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, |
| const ASN1_ITEM *it); |
| static int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, |
| int utype, char *free_cont, 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 = { |
| NULL, 0, |
| long_new, |
| long_free, |
| long_free, /* Clear should set to initial value */ |
| long_c2i, |
| long_i2c, |
| long_print |
| }; |
| |
| ASN1_ITEM_start(LONG) |
| ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &long_pf, ASN1_LONG_UNDEF, "LONG" |
| ASN1_ITEM_end(LONG) |
| |
| ASN1_ITEM_start(ZLONG) |
| ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &long_pf, 0, "ZLONG" |
| ASN1_ITEM_end(ZLONG) |
| |
| static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it) |
| { |
| *(long *)pval = it->size; |
| return 1; |
| } |
| |
| static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it) |
| { |
| *(long *)pval = it->size; |
| } |
| |
| static int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, |
| const ASN1_ITEM *it) |
| { |
| long ltmp; |
| unsigned long utmp; |
| int clen, pad, i; |
| /* this exists to bypass broken gcc optimization */ |
| char *cp = (char *)pval; |
| |
| /* use memcpy, because we may not be long aligned */ |
| OPENSSL_memcpy(<mp, cp, sizeof(long)); |
| |
| if (ltmp == it->size) |
| return -1; |
| /* |
| * Convert the long to positive: we subtract one if negative so we can |
| * cleanly handle the padding if only the MSB of the leading octet is |
| * set. |
| */ |
| if (ltmp < 0) |
| utmp = -ltmp - 1; |
| else |
| utmp = ltmp; |
| clen = BN_num_bits_word(utmp); |
| /* If MSB of leading octet set we need to pad */ |
| if (!(clen & 0x7)) |
| pad = 1; |
| else |
| pad = 0; |
| |
| /* Convert number of bits to number of octets */ |
| clen = (clen + 7) >> 3; |
| |
| if (cont) { |
| if (pad) |
| *cont++ = (ltmp < 0) ? 0xff : 0; |
| for (i = clen - 1; i >= 0; i--) { |
| cont[i] = (unsigned char)(utmp & 0xff); |
| if (ltmp < 0) |
| cont[i] ^= 0xff; |
| utmp >>= 8; |
| } |
| } |
| return clen + pad; |
| } |
| |
| static int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, |
| int utype, char *free_cont, const ASN1_ITEM *it) |
| { |
| int neg, i; |
| long ltmp; |
| unsigned long utmp = 0; |
| char *cp = (char *)pval; |
| if (len > (int)sizeof(long)) { |
| OPENSSL_PUT_ERROR(ASN1, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG); |
| return 0; |
| } |
| /* Is it negative? */ |
| if (len && (cont[0] & 0x80)) |
| neg = 1; |
| else |
| neg = 0; |
| utmp = 0; |
| for (i = 0; i < len; i++) { |
| utmp <<= 8; |
| if (neg) |
| utmp |= cont[i] ^ 0xff; |
| else |
| utmp |= cont[i]; |
| } |
| ltmp = (long)utmp; |
| if (neg) { |
| ltmp++; |
| ltmp = -ltmp; |
| } |
| if (ltmp == it->size) { |
| OPENSSL_PUT_ERROR(ASN1, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG); |
| return 0; |
| } |
| OPENSSL_memcpy(cp, <mp, sizeof(long)); |
| return 1; |
| } |
| |
| static int long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, |
| int indent, const ASN1_PCTX *pctx) |
| { |
| return BIO_printf(out, "%ld\n", *(long *)pval); |
| } |