/* 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 #include #include #include #include #include /* * 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 */ 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; } 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); }