122 lines
5.8 KiB
C
Vendored
122 lines
5.8 KiB
C
Vendored
/*
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* Copyright 1995-2024 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (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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#define idea_mul(r, a, b, ul) \
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ul = (unsigned long)a * b; \
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if (ul != 0) { \
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r = (ul & 0xffff) - (ul >> 16); \
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r -= ((r) >> 16); \
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} else { \
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r = (-(int)a - b + 1); /* assuming a or b is 0 and in range */ \
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}
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/* NOTE - c is not incremented as per n2l */
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#define n2ln(c, l1, l2, n) \
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{ \
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c += n; \
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l1 = l2 = 0; \
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switch (n) { \
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case 8: \
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l2 = ((unsigned long)(*(--(c)))); \
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/* fall through */ \
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case 7: \
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l2 |= ((unsigned long)(*(--(c)))) << 8; \
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/* fall through */ \
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case 6: \
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l2 |= ((unsigned long)(*(--(c)))) << 16; \
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/* fall through */ \
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case 5: \
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l2 |= ((unsigned long)(*(--(c)))) << 24; \
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/* fall through */ \
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case 4: \
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l1 = ((unsigned long)(*(--(c)))); \
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/* fall through */ \
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case 3: \
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l1 |= ((unsigned long)(*(--(c)))) << 8; \
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/* fall through */ \
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case 2: \
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l1 |= ((unsigned long)(*(--(c)))) << 16; \
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/* fall through */ \
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case 1: \
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l1 |= ((unsigned long)(*(--(c)))) << 24; \
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} \
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}
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/* NOTE - c is not incremented as per l2n */
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#define l2nn(l1, l2, c, n) \
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{ \
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c += n; \
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switch (n) { \
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case 8: \
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*(--(c)) = (unsigned char)(((l2)) & 0xff); \
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/* fall through */ \
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case 7: \
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*(--(c)) = (unsigned char)(((l2) >> 8) & 0xff); \
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/* fall through */ \
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case 6: \
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*(--(c)) = (unsigned char)(((l2) >> 16) & 0xff); \
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/* fall through */ \
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case 5: \
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*(--(c)) = (unsigned char)(((l2) >> 24) & 0xff); \
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/* fall through */ \
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case 4: \
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*(--(c)) = (unsigned char)(((l1)) & 0xff); \
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/* fall through */ \
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case 3: \
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*(--(c)) = (unsigned char)(((l1) >> 8) & 0xff); \
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/* fall through */ \
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case 2: \
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*(--(c)) = (unsigned char)(((l1) >> 16) & 0xff); \
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/* fall through */ \
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case 1: \
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*(--(c)) = (unsigned char)(((l1) >> 24) & 0xff); \
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} \
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}
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#undef n2l
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#define n2l(c, l) (l = ((unsigned long)(*((c)++))) << 24L, \
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l |= ((unsigned long)(*((c)++))) << 16L, \
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l |= ((unsigned long)(*((c)++))) << 8L, \
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l |= ((unsigned long)(*((c)++))))
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#undef l2n
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#define l2n(l, c) (*((c)++) = (unsigned char)(((l) >> 24L) & 0xff), \
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*((c)++) = (unsigned char)(((l) >> 16L) & 0xff), \
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*((c)++) = (unsigned char)(((l) >> 8L) & 0xff), \
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*((c)++) = (unsigned char)(((l)) & 0xff))
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#undef s2n
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#define s2n(l, c) (*((c)++) = (unsigned char)(((l)) & 0xff), \
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*((c)++) = (unsigned char)(((l) >> 8L) & 0xff))
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#undef n2s
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#define n2s(c, l) (l = ((IDEA_INT)(*((c)++))) << 8L, \
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l |= ((IDEA_INT)(*((c)++))))
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#define E_IDEA(num) \
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x1 &= 0xffff; \
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idea_mul(x1, x1, *p, ul); \
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p++; \
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x2 += *(p++); \
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x3 += *(p++); \
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x4 &= 0xffff; \
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idea_mul(x4, x4, *p, ul); \
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p++; \
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t0 = (x1 ^ x3) & 0xffff; \
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idea_mul(t0, t0, *p, ul); \
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p++; \
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t1 = (t0 + (x2 ^ x4)) & 0xffff; \
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idea_mul(t1, t1, *p, ul); \
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p++; \
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t0 += t1; \
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x1 ^= t1; \
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x4 ^= t0; \
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ul = x2 ^ t0; /* do the swap to x3 */ \
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x2 = x3 ^ t1; \
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x3 = ul;
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