diff options
Diffstat (limited to 'openssl/crypto/asn1/x_long.c')
-rw-r--r-- | openssl/crypto/asn1/x_long.c | 149 |
1 files changed, 81 insertions, 68 deletions
diff --git a/openssl/crypto/asn1/x_long.c b/openssl/crypto/asn1/x_long.c index f39361974..3aed44a3d 100644 --- a/openssl/crypto/asn1/x_long.c +++ b/openssl/crypto/asn1/x_long.c @@ -97,87 +97,100 @@ 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) +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; - } + 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; + } + 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)) { - 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; + 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_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, - int indent, const ASN1_PCTX *pctx) - { - return BIO_printf(out, "%ld\n", *(long *)pval); - } + int indent, const ASN1_PCTX *pctx) +{ + return BIO_printf(out, "%ld\n", *(long *)pval); +} |