Coverage Report

Created: 2025-06-13 06:58

/src/openssl31/crypto/rc5/rc5_enc.c
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Source (jump to first uncovered line)
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/*
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 * Copyright 1995-2020 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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/*
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 * RC5 low level APIs are deprecated for public use, but still ok for internal
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 * use.
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 */
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#include "internal/deprecated.h"
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#include <stdio.h>
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#include <openssl/rc5.h>
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#include "rc5_local.h"
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void RC5_32_cbc_encrypt(const unsigned char *in, unsigned char *out,
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                        long length, RC5_32_KEY *ks, unsigned char *iv,
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                        int encrypt)
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0
{
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0
    register unsigned long tin0, tin1;
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0
    register unsigned long tout0, tout1, xor0, xor1;
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0
    register long l = length;
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0
    unsigned long tin[2];
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0
    if (encrypt) {
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0
        c2l(iv, tout0);
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0
        c2l(iv, tout1);
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0
        iv -= 8;
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0
        for (l -= 8; l >= 0; l -= 8) {
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0
            c2l(in, tin0);
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0
            c2l(in, tin1);
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            tin0 ^= tout0;
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0
            tin1 ^= tout1;
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            tin[0] = tin0;
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            tin[1] = tin1;
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0
            RC5_32_encrypt(tin, ks);
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0
            tout0 = tin[0];
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0
            l2c(tout0, out);
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0
            tout1 = tin[1];
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0
            l2c(tout1, out);
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0
        }
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0
        if (l != -8) {
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0
            c2ln(in, tin0, tin1, l + 8);
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0
            tin0 ^= tout0;
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0
            tin1 ^= tout1;
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0
            tin[0] = tin0;
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0
            tin[1] = tin1;
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0
            RC5_32_encrypt(tin, ks);
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0
            tout0 = tin[0];
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0
            l2c(tout0, out);
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0
            tout1 = tin[1];
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0
            l2c(tout1, out);
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0
        }
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0
        l2c(tout0, iv);
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0
        l2c(tout1, iv);
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0
    } else {
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0
        c2l(iv, xor0);
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0
        c2l(iv, xor1);
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0
        iv -= 8;
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0
        for (l -= 8; l >= 0; l -= 8) {
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0
            c2l(in, tin0);
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0
            tin[0] = tin0;
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0
            c2l(in, tin1);
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            tin[1] = tin1;
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            RC5_32_decrypt(tin, ks);
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0
            tout0 = tin[0] ^ xor0;
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0
            tout1 = tin[1] ^ xor1;
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0
            l2c(tout0, out);
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0
            l2c(tout1, out);
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0
            xor0 = tin0;
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0
            xor1 = tin1;
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0
        }
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0
        if (l != -8) {
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0
            c2l(in, tin0);
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0
            tin[0] = tin0;
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0
            c2l(in, tin1);
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0
            tin[1] = tin1;
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            RC5_32_decrypt(tin, ks);
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0
            tout0 = tin[0] ^ xor0;
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0
            tout1 = tin[1] ^ xor1;
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0
            l2cn(tout0, tout1, out, l + 8);
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0
            xor0 = tin0;
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0
            xor1 = tin1;
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0
        }
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0
        l2c(xor0, iv);
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0
        l2c(xor1, iv);
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0
    }
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    tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
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    tin[0] = tin[1] = 0;
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0
}
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void RC5_32_encrypt(unsigned long *d, RC5_32_KEY *key)
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0
{
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    RC5_32_INT a, b, *s;
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    s = key->data;
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    a = d[0] + s[0];
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    b = d[1] + s[1];
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    E_RC5_32(a, b, s, 2);
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    E_RC5_32(a, b, s, 4);
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    E_RC5_32(a, b, s, 6);
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    E_RC5_32(a, b, s, 8);
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    E_RC5_32(a, b, s, 10);
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    E_RC5_32(a, b, s, 12);
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    E_RC5_32(a, b, s, 14);
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    E_RC5_32(a, b, s, 16);
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    if (key->rounds == 12) {
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        E_RC5_32(a, b, s, 18);
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        E_RC5_32(a, b, s, 20);
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        E_RC5_32(a, b, s, 22);
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0
        E_RC5_32(a, b, s, 24);
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0
    } else if (key->rounds == 16) {
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        /* Do a full expansion to avoid a jump */
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        E_RC5_32(a, b, s, 18);
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        E_RC5_32(a, b, s, 20);
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        E_RC5_32(a, b, s, 22);
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        E_RC5_32(a, b, s, 24);
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        E_RC5_32(a, b, s, 26);
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        E_RC5_32(a, b, s, 28);
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        E_RC5_32(a, b, s, 30);
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        E_RC5_32(a, b, s, 32);
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0
    }
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    d[0] = a;
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0
    d[1] = b;
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}
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void RC5_32_decrypt(unsigned long *d, RC5_32_KEY *key)
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0
{
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    RC5_32_INT a, b, *s;
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    s = key->data;
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    a = d[0];
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0
    b = d[1];
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    if (key->rounds == 16) {
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        D_RC5_32(a, b, s, 32);
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        D_RC5_32(a, b, s, 30);
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        D_RC5_32(a, b, s, 28);
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        D_RC5_32(a, b, s, 26);
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        /* Do a full expansion to avoid a jump */
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        D_RC5_32(a, b, s, 24);
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        D_RC5_32(a, b, s, 22);
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0
        D_RC5_32(a, b, s, 20);
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        D_RC5_32(a, b, s, 18);
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    } else if (key->rounds == 12) {
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        D_RC5_32(a, b, s, 24);
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        D_RC5_32(a, b, s, 22);
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        D_RC5_32(a, b, s, 20);
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        D_RC5_32(a, b, s, 18);
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0
    }
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    D_RC5_32(a, b, s, 16);
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    D_RC5_32(a, b, s, 14);
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    D_RC5_32(a, b, s, 12);
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    D_RC5_32(a, b, s, 10);
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    D_RC5_32(a, b, s, 8);
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    D_RC5_32(a, b, s, 6);
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    D_RC5_32(a, b, s, 4);
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    D_RC5_32(a, b, s, 2);
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0
    d[0] = a - s[0];
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0
    d[1] = b - s[1];
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0
}