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| 1 /* x_long.c */ | |
| 2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL | |
| 3 * project 2000. | |
| 4 */ | |
| 5 /* ==================================================================== | |
| 6 * Copyright (c) 2000 The OpenSSL Project. All rights reserved. | |
| 7 * | |
| 8 * Redistribution and use in source and binary forms, with or without | |
| 9 * modification, are permitted provided that the following conditions | |
| 10 * are met: | |
| 11 * | |
| 12 * 1. Redistributions of source code must retain the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer. | |
| 14 * | |
| 15 * 2. Redistributions in binary form must reproduce the above copyright | |
| 16 * notice, this list of conditions and the following disclaimer in | |
| 17 * the documentation and/or other materials provided with the | |
| 18 * distribution. | |
| 19 * | |
| 20 * 3. All advertising materials mentioning features or use of this | |
| 21 * software must display the following acknowledgment: | |
| 22 * "This product includes software developed by the OpenSSL Project | |
| 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
| 24 * | |
| 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
| 26 * endorse or promote products derived from this software without | |
| 27 * prior written permission. For written permission, please contact | |
| 28 * licensing@OpenSSL.org. | |
| 29 * | |
| 30 * 5. Products derived from this software may not be called "OpenSSL" | |
| 31 * nor may "OpenSSL" appear in their names without prior written | |
| 32 * permission of the OpenSSL Project. | |
| 33 * | |
| 34 * 6. Redistributions of any form whatsoever must retain the following | |
| 35 * acknowledgment: | |
| 36 * "This product includes software developed by the OpenSSL Project | |
| 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
| 38 * | |
| 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
| 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
| 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 50 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 51 * ==================================================================== | |
| 52 * | |
| 53 * This product includes cryptographic software written by Eric Young | |
| 54 * (eay@cryptsoft.com). This product includes software written by Tim | |
| 55 * Hudson (tjh@cryptsoft.com). | |
| 56 * | |
| 57 */ | |
| 58 | |
| 59 #include <stdio.h> | |
| 60 #include "cryptlib.h" | |
| 61 #include <openssl/asn1t.h> | |
| 62 #include <openssl/bn.h> | |
| 63 | |
| 64 /* Custom primitive type for long handling. This converts between an ASN1_INTEGE
R | |
| 65 * and a long directly. | |
| 66 */ | |
| 67 | |
| 68 | |
| 69 static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it); | |
| 70 static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it); | |
| 71 | |
| 72 static int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const A
SN1_ITEM *it); | |
| 73 static int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int u
type, char *free_cont, const ASN1_ITEM *it); | |
| 74 static int long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, int inde
nt, const ASN1_PCTX *pctx); | |
| 75 | |
| 76 static ASN1_PRIMITIVE_FUNCS long_pf = { | |
| 77 NULL, 0, | |
| 78 long_new, | |
| 79 long_free, | |
| 80 long_free, /* Clear should set to initial value */ | |
| 81 long_c2i, | |
| 82 long_i2c, | |
| 83 long_print | |
| 84 }; | |
| 85 | |
| 86 ASN1_ITEM_start(LONG) | |
| 87 ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &long_pf, ASN1_LONG_UNDEF
, "LONG" | |
| 88 ASN1_ITEM_end(LONG) | |
| 89 | |
| 90 ASN1_ITEM_start(ZLONG) | |
| 91 ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &long_pf, 0, "ZLONG" | |
| 92 ASN1_ITEM_end(ZLONG) | |
| 93 | |
| 94 static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
| 95 { | |
| 96 *(long *)pval = it->size; | |
| 97 return 1; | |
| 98 } | |
| 99 | |
| 100 static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
| 101 { | |
| 102 *(long *)pval = it->size; | |
| 103 } | |
| 104 | |
| 105 static int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const A
SN1_ITEM *it) | |
| 106 { | |
| 107 long ltmp; | |
| 108 unsigned long utmp; | |
| 109 int clen, pad, i; | |
| 110 /* this exists to bypass broken gcc optimization */ | |
| 111 char *cp = (char *)pval; | |
| 112 | |
| 113 /* use memcpy, because we may not be long aligned */ | |
| 114 memcpy(<mp, cp, sizeof(long)); | |
| 115 | |
| 116 if(ltmp == it->size) return -1; | |
| 117 /* Convert the long to positive: we subtract one if negative so | |
| 118 * we can cleanly handle the padding if only the MSB of the leading | |
| 119 * octet is set. | |
| 120 */ | |
| 121 if(ltmp < 0) utmp = -ltmp - 1; | |
| 122 else utmp = ltmp; | |
| 123 clen = BN_num_bits_word(utmp); | |
| 124 /* If MSB of leading octet set we need to pad */ | |
| 125 if(!(clen & 0x7)) pad = 1; | |
| 126 else pad = 0; | |
| 127 | |
| 128 /* Convert number of bits to number of octets */ | |
| 129 clen = (clen + 7) >> 3; | |
| 130 | |
| 131 if(cont) { | |
| 132 if(pad) *cont++ = (ltmp < 0) ? 0xff : 0; | |
| 133 for(i = clen - 1; i >= 0; i--) { | |
| 134 cont[i] = (unsigned char)(utmp & 0xff); | |
| 135 if(ltmp < 0) cont[i] ^= 0xff; | |
| 136 utmp >>= 8; | |
| 137 } | |
| 138 } | |
| 139 return clen + pad; | |
| 140 } | |
| 141 | |
| 142 static int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, | |
| 143 int utype, char *free_cont, const ASN1_ITEM *it) | |
| 144 { | |
| 145 int neg, i; | |
| 146 long ltmp; | |
| 147 unsigned long utmp = 0; | |
| 148 char *cp = (char *)pval; | |
| 149 if(len > (int)sizeof(long)) { | |
| 150 ASN1err(ASN1_F_LONG_C2I, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG); | |
| 151 return 0; | |
| 152 } | |
| 153 /* Is it negative? */ | |
| 154 if(len && (cont[0] & 0x80)) neg = 1; | |
| 155 else neg = 0; | |
| 156 utmp = 0; | |
| 157 for(i = 0; i < len; i++) { | |
| 158 utmp <<= 8; | |
| 159 if(neg) utmp |= cont[i] ^ 0xff; | |
| 160 else utmp |= cont[i]; | |
| 161 } | |
| 162 ltmp = (long)utmp; | |
| 163 if(neg) { | |
| 164 ltmp++; | |
| 165 ltmp = -ltmp; | |
| 166 } | |
| 167 if(ltmp == it->size) { | |
| 168 ASN1err(ASN1_F_LONG_C2I, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG); | |
| 169 return 0; | |
| 170 } | |
| 171 memcpy(cp, <mp, sizeof(long)); | |
| 172 return 1; | |
| 173 } | |
| 174 | |
| 175 static int long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, | |
| 176 int indent, const ASN1_PCTX *pctx) | |
| 177 { | |
| 178 return BIO_printf(out, "%ld\n", *(long *)pval); | |
| 179 } | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master