/* $OpenBSD: ripemd.c,v 1.19 2024/06/01 07:36:16 tb Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    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 the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <openssl/opensslconf.h>

#include <openssl/crypto.h>
#include <openssl/ripemd.h>

#include "crypto_internal.h"

/* Ensure that SHA_LONG and uint32_t are equivalent sizes. */
CTASSERT(sizeof(RIPEMD160_LONG) == sizeof(uint32_t));

#if 0
#define F1(x,y,z)        ((x)^(y)^(z))
#define F2(x,y,z)       (((x)&(y))|((~x)&z))
#define F3(x,y,z)       (((x)|(~y))^(z))
#define F4(x,y,z)       (((x)&(z))|((y)&(~(z))))
#define F5(x,y,z)        ((x)^((y)|(~(z))))
#else
/*
 * Transformed F2 and F4 are courtesy of Wei Dai <weidai@eskimo.com>
 */
#define F1(x,y,z)       ((x) ^ (y) ^ (z))
#define F2(x,y,z)       ((((y) ^ (z)) & (x)) ^ (z))
#define F3(x,y,z)       (((~(y)) | (x)) ^ (z))
#define F4(x,y,z)       ((((x) ^ (y)) & (z)) ^ (y))
#define F5(x,y,z)       (((~(z)) | (y)) ^ (x))
#endif

#define KL0 0x00000000L
#define KL1 0x5A827999L
#define KL2 0x6ED9EBA1L
#define KL3 0x8F1BBCDCL
#define KL4 0xA953FD4EL

#define KR0 0x50A28BE6L
#define KR1 0x5C4DD124L
#define KR2 0x6D703EF3L
#define KR3 0x7A6D76E9L
#define KR4 0x00000000L

#define RIP1(a,b,c,d,e,w,s) { \
        a+=F1(b,c,d)+w; \
        a=crypto_rol_u32(a,s)+e; \
        c=crypto_rol_u32(c,10); }

#define RIP2(a,b,c,d,e,w,s,K) { \
        a+=F2(b,c,d)+w+K; \
        a=crypto_rol_u32(a,s)+e; \
        c=crypto_rol_u32(c,10); }

#define RIP3(a,b,c,d,e,w,s,K) { \
        a+=F3(b,c,d)+w+K; \
        a=crypto_rol_u32(a,s)+e; \
        c=crypto_rol_u32(c,10); }

#define RIP4(a,b,c,d,e,w,s,K) { \
        a+=F4(b,c,d)+w+K; \
        a=crypto_rol_u32(a,s)+e; \
        c=crypto_rol_u32(c,10); }

#define RIP5(a,b,c,d,e,w,s,K) { \
        a+=F5(b,c,d)+w+K; \
        a=crypto_rol_u32(a,s)+e; \
        c=crypto_rol_u32(c,10); }

static void
ripemd160_block_data_order(RIPEMD160_CTX *ctx, const void *_in, size_t num)
{
        const uint8_t *in = _in;
        const RIPEMD160_LONG *in32;
        unsigned int A, B, C, D, E;
        unsigned int a, b, c, d, e;
        unsigned int X0, X1, X2, X3, X4, X5, X6, X7,
            X8, X9, X10, X11, X12, X13, X14, X15;

        for (; num--; ) {
                A = ctx->A;
                B = ctx->B;
                C = ctx->C;
                D = ctx->D;
                E = ctx->E;

                if ((uintptr_t)in % 4 == 0) {
                        /* Input is 32 bit aligned. */
                        in32 = (const RIPEMD160_LONG *)in;
                        X0 = le32toh(in32[0]);
                        X1 = le32toh(in32[1]);
                        X2 = le32toh(in32[2]);
                        X3 = le32toh(in32[3]);
                        X4 = le32toh(in32[4]);
                        X5 = le32toh(in32[5]);
                        X6 = le32toh(in32[6]);
                        X7 = le32toh(in32[7]);
                        X8 = le32toh(in32[8]);
                        X9 = le32toh(in32[9]);
                        X10 = le32toh(in32[10]);
                        X11 = le32toh(in32[11]);
                        X12 = le32toh(in32[12]);
                        X13 = le32toh(in32[13]);
                        X14 = le32toh(in32[14]);
                        X15 = le32toh(in32[15]);
                } else {
                        /* Input is not 32 bit aligned. */
                        X0 = crypto_load_le32toh(&in[0 * 4]);
                        X1 = crypto_load_le32toh(&in[1 * 4]);
                        X2 = crypto_load_le32toh(&in[2 * 4]);
                        X3 = crypto_load_le32toh(&in[3 * 4]);
                        X4 = crypto_load_le32toh(&in[4 * 4]);
                        X5 = crypto_load_le32toh(&in[5 * 4]);
                        X6 = crypto_load_le32toh(&in[6 * 4]);
                        X7 = crypto_load_le32toh(&in[7 * 4]);
                        X8 = crypto_load_le32toh(&in[8 * 4]);
                        X9 = crypto_load_le32toh(&in[9 * 4]);
                        X10 = crypto_load_le32toh(&in[10 * 4]);
                        X11 = crypto_load_le32toh(&in[11 * 4]);
                        X12 = crypto_load_le32toh(&in[12 * 4]);
                        X13 = crypto_load_le32toh(&in[13 * 4]);
                        X14 = crypto_load_le32toh(&in[14 * 4]);
                        X15 = crypto_load_le32toh(&in[15 * 4]);
                }
                in += RIPEMD160_CBLOCK;

                RIP1(A, B, C, D, E, X0, 11);
                RIP1(E, A, B, C, D, X1, 14);
                RIP1(D, E, A, B, C, X2, 15);
                RIP1(C, D, E, A, B, X3, 12);
                RIP1(B, C, D, E, A, X4, 5);
                RIP1(A, B, C, D, E, X5, 8);
                RIP1(E, A, B, C, D, X6, 7);
                RIP1(D, E, A, B, C, X7, 9);
                RIP1(C, D, E, A, B, X8, 11);
                RIP1(B, C, D, E, A, X9, 13);
                RIP1(A, B, C, D, E, X10, 14);
                RIP1(E, A, B, C, D, X11, 15);
                RIP1(D, E, A, B, C, X12, 6);
                RIP1(C, D, E, A, B, X13, 7);
                RIP1(B, C, D, E, A, X14, 9);
                RIP1(A, B, C, D, E, X15, 8);

                RIP2(E, A, B, C, D, X7, 7, KL1);
                RIP2(D, E, A, B, C, X4, 6, KL1);
                RIP2(C, D, E, A, B, X13, 8, KL1);
                RIP2(B, C, D, E, A, X1, 13, KL1);
                RIP2(A, B, C, D, E, X10, 11, KL1);
                RIP2(E, A, B, C, D, X6, 9, KL1);
                RIP2(D, E, A, B, C, X15, 7, KL1);
                RIP2(C, D, E, A, B, X3, 15, KL1);
                RIP2(B, C, D, E, A, X12, 7, KL1);
                RIP2(A, B, C, D, E, X0, 12, KL1);
                RIP2(E, A, B, C, D, X9, 15, KL1);
                RIP2(D, E, A, B, C, X5, 9, KL1);
                RIP2(C, D, E, A, B, X2, 11, KL1);
                RIP2(B, C, D, E, A, X14, 7, KL1);
                RIP2(A, B, C, D, E, X11, 13, KL1);
                RIP2(E, A, B, C, D, X8, 12, KL1);

                RIP3(D, E, A, B, C, X3, 11, KL2);
                RIP3(C, D, E, A, B, X10, 13, KL2);
                RIP3(B, C, D, E, A, X14, 6, KL2);
                RIP3(A, B, C, D, E, X4, 7, KL2);
                RIP3(E, A, B, C, D, X9, 14, KL2);
                RIP3(D, E, A, B, C, X15, 9, KL2);
                RIP3(C, D, E, A, B, X8, 13, KL2);
                RIP3(B, C, D, E, A, X1, 15, KL2);
                RIP3(A, B, C, D, E, X2, 14, KL2);
                RIP3(E, A, B, C, D, X7, 8, KL2);
                RIP3(D, E, A, B, C, X0, 13, KL2);
                RIP3(C, D, E, A, B, X6, 6, KL2);
                RIP3(B, C, D, E, A, X13, 5, KL2);
                RIP3(A, B, C, D, E, X11, 12, KL2);
                RIP3(E, A, B, C, D, X5, 7, KL2);
                RIP3(D, E, A, B, C, X12, 5, KL2);

                RIP4(C, D, E, A, B, X1, 11, KL3);
                RIP4(B, C, D, E, A, X9, 12, KL3);
                RIP4(A, B, C, D, E, X11, 14, KL3);
                RIP4(E, A, B, C, D, X10, 15, KL3);
                RIP4(D, E, A, B, C, X0, 14, KL3);
                RIP4(C, D, E, A, B, X8, 15, KL3);
                RIP4(B, C, D, E, A, X12, 9, KL3);
                RIP4(A, B, C, D, E, X4, 8, KL3);
                RIP4(E, A, B, C, D, X13, 9, KL3);
                RIP4(D, E, A, B, C, X3, 14, KL3);
                RIP4(C, D, E, A, B, X7, 5, KL3);
                RIP4(B, C, D, E, A, X15, 6, KL3);
                RIP4(A, B, C, D, E, X14, 8, KL3);
                RIP4(E, A, B, C, D, X5, 6, KL3);
                RIP4(D, E, A, B, C, X6, 5, KL3);
                RIP4(C, D, E, A, B, X2, 12, KL3);

                RIP5(B, C, D, E, A, X4, 9, KL4);
                RIP5(A, B, C, D, E, X0, 15, KL4);
                RIP5(E, A, B, C, D, X5, 5, KL4);
                RIP5(D, E, A, B, C, X9, 11, KL4);
                RIP5(C, D, E, A, B, X7, 6, KL4);
                RIP5(B, C, D, E, A, X12, 8, KL4);
                RIP5(A, B, C, D, E, X2, 13, KL4);
                RIP5(E, A, B, C, D, X10, 12, KL4);
                RIP5(D, E, A, B, C, X14, 5, KL4);
                RIP5(C, D, E, A, B, X1, 12, KL4);
                RIP5(B, C, D, E, A, X3, 13, KL4);
                RIP5(A, B, C, D, E, X8, 14, KL4);
                RIP5(E, A, B, C, D, X11, 11, KL4);
                RIP5(D, E, A, B, C, X6, 8, KL4);
                RIP5(C, D, E, A, B, X15, 5, KL4);
                RIP5(B, C, D, E, A, X13, 6, KL4);

                a = A;
                b = B;
                c = C;
                d = D;
                e = E;
                /* Do other half */
                A = ctx->A;
                B = ctx->B;
                C = ctx->C;
                D = ctx->D;
                E = ctx->E;

                RIP5(A, B, C, D, E, X5, 8, KR0);
                RIP5(E, A, B, C, D, X14, 9, KR0);
                RIP5(D, E, A, B, C, X7, 9, KR0);
                RIP5(C, D, E, A, B, X0, 11, KR0);
                RIP5(B, C, D, E, A, X9, 13, KR0);
                RIP5(A, B, C, D, E, X2, 15, KR0);
                RIP5(E, A, B, C, D, X11, 15, KR0);
                RIP5(D, E, A, B, C, X4, 5, KR0);
                RIP5(C, D, E, A, B, X13, 7, KR0);
                RIP5(B, C, D, E, A, X6, 7, KR0);
                RIP5(A, B, C, D, E, X15, 8, KR0);
                RIP5(E, A, B, C, D, X8, 11, KR0);
                RIP5(D, E, A, B, C, X1, 14, KR0);
                RIP5(C, D, E, A, B, X10, 14, KR0);
                RIP5(B, C, D, E, A, X3, 12, KR0);
                RIP5(A, B, C, D, E, X12, 6, KR0);

                RIP4(E, A, B, C, D, X6, 9, KR1);
                RIP4(D, E, A, B, C, X11, 13, KR1);
                RIP4(C, D, E, A, B, X3, 15, KR1);
                RIP4(B, C, D, E, A, X7, 7, KR1);
                RIP4(A, B, C, D, E, X0, 12, KR1);
                RIP4(E, A, B, C, D, X13, 8, KR1);
                RIP4(D, E, A, B, C, X5, 9, KR1);
                RIP4(C, D, E, A, B, X10, 11, KR1);
                RIP4(B, C, D, E, A, X14, 7, KR1);
                RIP4(A, B, C, D, E, X15, 7, KR1);
                RIP4(E, A, B, C, D, X8, 12, KR1);
                RIP4(D, E, A, B, C, X12, 7, KR1);
                RIP4(C, D, E, A, B, X4, 6, KR1);
                RIP4(B, C, D, E, A, X9, 15, KR1);
                RIP4(A, B, C, D, E, X1, 13, KR1);
                RIP4(E, A, B, C, D, X2, 11, KR1);

                RIP3(D, E, A, B, C, X15, 9, KR2);
                RIP3(C, D, E, A, B, X5, 7, KR2);
                RIP3(B, C, D, E, A, X1, 15, KR2);
                RIP3(A, B, C, D, E, X3, 11, KR2);
                RIP3(E, A, B, C, D, X7, 8, KR2);
                RIP3(D, E, A, B, C, X14, 6, KR2);
                RIP3(C, D, E, A, B, X6, 6, KR2);
                RIP3(B, C, D, E, A, X9, 14, KR2);
                RIP3(A, B, C, D, E, X11, 12, KR2);
                RIP3(E, A, B, C, D, X8, 13, KR2);
                RIP3(D, E, A, B, C, X12, 5, KR2);
                RIP3(C, D, E, A, B, X2, 14, KR2);
                RIP3(B, C, D, E, A, X10, 13, KR2);
                RIP3(A, B, C, D, E, X0, 13, KR2);
                RIP3(E, A, B, C, D, X4, 7, KR2);
                RIP3(D, E, A, B, C, X13, 5, KR2);

                RIP2(C, D, E, A, B, X8, 15, KR3);
                RIP2(B, C, D, E, A, X6, 5, KR3);
                RIP2(A, B, C, D, E, X4, 8, KR3);
                RIP2(E, A, B, C, D, X1, 11, KR3);
                RIP2(D, E, A, B, C, X3, 14, KR3);
                RIP2(C, D, E, A, B, X11, 14, KR3);
                RIP2(B, C, D, E, A, X15, 6, KR3);
                RIP2(A, B, C, D, E, X0, 14, KR3);
                RIP2(E, A, B, C, D, X5, 6, KR3);
                RIP2(D, E, A, B, C, X12, 9, KR3);
                RIP2(C, D, E, A, B, X2, 12, KR3);
                RIP2(B, C, D, E, A, X13, 9, KR3);
                RIP2(A, B, C, D, E, X9, 12, KR3);
                RIP2(E, A, B, C, D, X7, 5, KR3);
                RIP2(D, E, A, B, C, X10, 15, KR3);
                RIP2(C, D, E, A, B, X14, 8, KR3);

                RIP1(B, C, D, E, A, X12, 8);
                RIP1(A, B, C, D, E, X15, 5);
                RIP1(E, A, B, C, D, X10, 12);
                RIP1(D, E, A, B, C, X4, 9);
                RIP1(C, D, E, A, B, X1, 12);
                RIP1(B, C, D, E, A, X5, 5);
                RIP1(A, B, C, D, E, X8, 14);
                RIP1(E, A, B, C, D, X7, 6);
                RIP1(D, E, A, B, C, X6, 8);
                RIP1(C, D, E, A, B, X2, 13);
                RIP1(B, C, D, E, A, X13, 6);
                RIP1(A, B, C, D, E, X14, 5);
                RIP1(E, A, B, C, D, X0, 15);
                RIP1(D, E, A, B, C, X3, 13);
                RIP1(C, D, E, A, B, X9, 11);
                RIP1(B, C, D, E, A, X11, 11);

                D = ctx->B + c + D;
                ctx->B = ctx->C + d + E;
                ctx->C = ctx->D + e + A;
                ctx->D = ctx->E + a + B;
                ctx->E = ctx->A + b + C;
                ctx->A = D;
        }
}

int
RIPEMD160_Init(RIPEMD160_CTX *c)
{
        memset(c, 0, sizeof(*c));

        c->A = 0x67452301UL;
        c->B = 0xEFCDAB89UL;
        c->C = 0x98BADCFEUL;
        c->D = 0x10325476UL;
        c->E = 0xC3D2E1F0UL;

        return 1;
}
LCRYPTO_ALIAS(RIPEMD160_Init);

int
RIPEMD160_Update(RIPEMD160_CTX *c, const void *data_, size_t len)
{
        const unsigned char *data = data_;
        unsigned char *p;
        RIPEMD160_LONG l;
        size_t n;

        if (len == 0)
                return 1;

        l = (c->Nl + (((RIPEMD160_LONG)len) << 3))&0xffffffffUL;
        /* 95-05-24 eay Fixed a bug with the overflow handling, thanks to
         * Wei Dai <weidai@eskimo.com> for pointing it out. */
        if (l < c->Nl) /* overflow */
                c->Nh++;
        c->Nh+=(RIPEMD160_LONG)(len>>29);       /* might cause compiler warning on 16-bit */
        c->Nl = l;

        n = c->num;
        if (n != 0) {
                p = (unsigned char *)c->data;

                if (len >= RIPEMD160_CBLOCK || len + n >= RIPEMD160_CBLOCK) {
                        memcpy(p + n, data, RIPEMD160_CBLOCK - n);
                        ripemd160_block_data_order(c, p, 1);
                        n = RIPEMD160_CBLOCK - n;
                        data += n;
                        len -= n;
                        c->num = 0;
                        memset(p, 0, RIPEMD160_CBLOCK); /* keep it zeroed */
                } else {
                        memcpy(p + n, data, len);
                        c->num += (unsigned int)len;
                        return 1;
                }
        }

        n = len/RIPEMD160_CBLOCK;
        if (n > 0) {
                ripemd160_block_data_order(c, data, n);
                n    *= RIPEMD160_CBLOCK;
                data += n;
                len -= n;
        }

        if (len != 0) {
                p = (unsigned char *)c->data;
                c->num = (unsigned int)len;
                memcpy(p, data, len);
        }
        return 1;
}
LCRYPTO_ALIAS(RIPEMD160_Update);

void
RIPEMD160_Transform(RIPEMD160_CTX *c, const unsigned char *data)
{
        ripemd160_block_data_order(c, data, 1);
}
LCRYPTO_ALIAS(RIPEMD160_Transform);

int
RIPEMD160_Final(unsigned char *md, RIPEMD160_CTX *c)
{
        unsigned char *p = (unsigned char *)c->data;
        size_t n = c->num;

        p[n] = 0x80; /* there is always room for one */
        n++;

        if (n > (RIPEMD160_CBLOCK - 8)) {
                memset(p + n, 0, RIPEMD160_CBLOCK - n);
                n = 0;
                ripemd160_block_data_order(c, p, 1);
        }

        memset(p + n, 0, RIPEMD160_CBLOCK - 8 - n);
        c->data[RIPEMD160_LBLOCK - 2] = htole32(c->Nl);
        c->data[RIPEMD160_LBLOCK - 1] = htole32(c->Nh);

        ripemd160_block_data_order(c, p, 1);
        c->num = 0;
        memset(p, 0, RIPEMD160_CBLOCK);

        crypto_store_htole32(&md[0 * 4], c->A);
        crypto_store_htole32(&md[1 * 4], c->B);
        crypto_store_htole32(&md[2 * 4], c->C);
        crypto_store_htole32(&md[3 * 4], c->D);
        crypto_store_htole32(&md[4 * 4], c->E);

        return 1;
}
LCRYPTO_ALIAS(RIPEMD160_Final);

unsigned char *
RIPEMD160(const unsigned char *d, size_t n, unsigned char *md)
{
        RIPEMD160_CTX c;

        if (!RIPEMD160_Init(&c))
                return NULL;
        RIPEMD160_Update(&c, d, n);
        RIPEMD160_Final(md, &c);
        explicit_bzero(&c, sizeof(c));
        return (md);
}
LCRYPTO_ALIAS(RIPEMD160);