X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fasn1%2Fx_long.c;h=3aed44a3ddf753c63ebbf6738749ace5656db675;hp=4b5953c0fd800065fb3ee615ad47d150f1122935;hb=1810b0472838495129fdc4b652daba5dfb4ee90c;hpb=d420ac2c7d4ba9d99ff2c257a3ad71ecc6d876e2 diff --git a/crypto/asn1/x_long.c b/crypto/asn1/x_long.c index 4b5953c0fd..3aed44a3dd 100644 --- a/crypto/asn1/x_long.c +++ b/crypto/asn1/x_long.c @@ -1,6 +1,7 @@ /* x_long.c */ -/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL - * project 2000. +/* + * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project + * 2000. */ /* ==================================================================== * Copyright (c) 2000 The OpenSSL Project. All rights reserved. @@ -10,7 +11,7 @@ * are met: * * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. + * 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 @@ -59,111 +60,137 @@ #include #include "cryptlib.h" #include +#include -/* Custom primitive type for long handling. This converts between an ASN1_INTEGER - * and a long directly. +/* + * 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, unsigned char *cont, int len, int utype, char *free_cont, 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 ASN1_PRIMITIVE_FUNCS long_pf = { - NULL, 0, - long_new, - long_free, - long_free, /* Clear should set to initial value */ - long_c2i, - long_i2c + 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_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_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; + *(long *)pval = it->size; + return 1; } static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it) { - *(long *)pval = it->size; + *(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_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) { - 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; + int neg, i; + long ltmp; + unsigned long utmp = 0; + char *cp = (char *)pval; + if (len > (int)sizeof(long)) { + ASN1err(ASN1_F_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) { + ASN1err(ASN1_F_LONG_C2I, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG); + return 0; + } + memcpy(cp, <mp, sizeof(long)); + return 1; } -static int long_c2i(ASN1_VALUE **pval, 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) { - int neg, i; - long ltmp; - unsigned long utmp = 0; - char *cp = (char *)pval; - if(len > (int)sizeof(long)) { - ASN1err(ASN1_F_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) { - ASN1err(ASN1_F_LONG_C2I, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG); - return 0; - } - memcpy(cp, <mp, sizeof(long)); - return 1; + return BIO_printf(out, "%ld\n", *(long *)pval); }