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Diffstat (limited to 'src/crypto/asn1/x_long.c')
| -rw-r--r-- | src/crypto/asn1/x_long.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/src/crypto/asn1/x_long.c b/src/crypto/asn1/x_long.c new file mode 100644 index 0000000..5c2f96e --- /dev/null +++ b/src/crypto/asn1/x_long.c @@ -0,0 +1,182 @@ +/* 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); + } |