mirror of
https://github.com/freebsd/freebsd-src
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145 lines
4.2 KiB
C
145 lines
4.2 KiB
C
/*
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* Copyright 1999-2018 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* Derived from include/crypto/md32_common.h
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*
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* HASH_UPDATE and HASH_FINAL have been updated to work with the
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* auth_hash interface.
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*/
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#if defined(DATA_ORDER_IS_BIG_ENDIAN)
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# define HOST_c2l(c,l) (l =(((unsigned long)(*((c)++)))<<24), \
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l|=(((unsigned long)(*((c)++)))<<16), \
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l|=(((unsigned long)(*((c)++)))<< 8), \
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l|=(((unsigned long)(*((c)++))) ) )
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# define HOST_l2c(l,c) (*((c)++)=(unsigned char)(((l)>>24)&0xff), \
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*((c)++)=(unsigned char)(((l)>>16)&0xff), \
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*((c)++)=(unsigned char)(((l)>> 8)&0xff), \
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*((c)++)=(unsigned char)(((l) )&0xff), \
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l)
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#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
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# define HOST_c2l(c,l) (l =(((unsigned long)(*((c)++))) ), \
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l|=(((unsigned long)(*((c)++)))<< 8), \
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l|=(((unsigned long)(*((c)++)))<<16), \
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l|=(((unsigned long)(*((c)++)))<<24) )
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# define HOST_l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
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*((c)++)=(unsigned char)(((l)>> 8)&0xff), \
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*((c)++)=(unsigned char)(((l)>>16)&0xff), \
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*((c)++)=(unsigned char)(((l)>>24)&0xff), \
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l)
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#endif
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/*
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* Time for some action :-)
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*/
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static int
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HASH_UPDATE(void *c_, const void *data_, unsigned int len)
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{
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HASH_CTX *c = c_;
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const unsigned char *data = data_;
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unsigned char *p;
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HASH_LONG l;
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size_t n;
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if (len == 0)
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return 0;
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l = (c->Nl + (((HASH_LONG) len) << 3)) & 0xffffffffUL;
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if (l < c->Nl) /* overflow */
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c->Nh++;
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c->Nh += (HASH_LONG) (len >> 29); /* might cause compiler warning on
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* 16-bit */
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c->Nl = l;
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n = c->num;
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if (n != 0) {
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p = (unsigned char *)c->data;
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if (len >= HASH_CBLOCK || len + n >= HASH_CBLOCK) {
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memcpy(p + n, data, HASH_CBLOCK - n);
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HASH_BLOCK_DATA_ORDER(c, p, 1);
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n = HASH_CBLOCK - n;
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data += n;
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len -= n;
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c->num = 0;
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/*
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* We use memset rather than OPENSSL_cleanse() here deliberately.
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* Using OPENSSL_cleanse() here could be a performance issue. It
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* will get properly cleansed on finalisation so this isn't a
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* security problem.
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*/
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memset(p, 0, HASH_CBLOCK); /* keep it zeroed */
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} else {
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memcpy(p + n, data, len);
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c->num += (unsigned int)len;
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return 0;
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}
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}
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n = len / HASH_CBLOCK;
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if (n > 0) {
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HASH_BLOCK_DATA_ORDER(c, data, n);
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n *= HASH_CBLOCK;
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data += n;
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len -= n;
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}
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if (len != 0) {
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p = (unsigned char *)c->data;
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c->num = (unsigned int)len;
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memcpy(p, data, len);
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}
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return 0;
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}
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static void
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HASH_FINAL(uint8_t *md, void *c_)
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{
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HASH_CTX *c = c_;
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unsigned char *p = (unsigned char *)c->data;
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size_t n = c->num;
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p[n] = 0x80; /* there is always room for one */
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n++;
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if (n > (HASH_CBLOCK - 8)) {
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memset(p + n, 0, HASH_CBLOCK - n);
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n = 0;
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HASH_BLOCK_DATA_ORDER(c, p, 1);
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}
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memset(p + n, 0, HASH_CBLOCK - 8 - n);
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p += HASH_CBLOCK - 8;
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#if defined(DATA_ORDER_IS_BIG_ENDIAN)
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(void)HOST_l2c(c->Nh, p);
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(void)HOST_l2c(c->Nl, p);
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#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
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(void)HOST_l2c(c->Nl, p);
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(void)HOST_l2c(c->Nh, p);
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#endif
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p -= HASH_CBLOCK;
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HASH_BLOCK_DATA_ORDER(c, p, 1);
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c->num = 0;
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OPENSSL_cleanse(p, HASH_CBLOCK);
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#ifndef HASH_MAKE_STRING
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# error "HASH_MAKE_STRING must be defined!"
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#else
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HASH_MAKE_STRING(c, md);
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#endif
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return;
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}
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