|
- /* 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>
-
-
- /* 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, long_c2i, 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, long_c2i, 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);
- }
|