diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/rc2/rc2_cbc.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/rc2/rc2_cbc.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/rc2/rc2_cbc.c b/openssl-1.1.0h/crypto/rc2/rc2_cbc.c new file mode 100644 index 0000000..2b59353 --- /dev/null +++ b/openssl-1.1.0h/crypto/rc2/rc2_cbc.c @@ -0,0 +1,179 @@ +/* + * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include <openssl/rc2.h> +#include "rc2_locl.h" + +void RC2_cbc_encrypt(const unsigned char *in, unsigned char *out, long length, + RC2_KEY *ks, unsigned char *iv, int encrypt) +{ + register unsigned long tin0, tin1; + register unsigned long tout0, tout1, xor0, xor1; + register long l = length; + unsigned long tin[2]; + + if (encrypt) { + c2l(iv, tout0); + c2l(iv, tout1); + iv -= 8; + for (l -= 8; l >= 0; l -= 8) { + c2l(in, tin0); + c2l(in, tin1); + tin0 ^= tout0; + tin1 ^= tout1; + tin[0] = tin0; + tin[1] = tin1; + RC2_encrypt(tin, ks); + tout0 = tin[0]; + l2c(tout0, out); + tout1 = tin[1]; + l2c(tout1, out); + } + if (l != -8) { + c2ln(in, tin0, tin1, l + 8); + tin0 ^= tout0; + tin1 ^= tout1; + tin[0] = tin0; + tin[1] = tin1; + RC2_encrypt(tin, ks); + tout0 = tin[0]; + l2c(tout0, out); + tout1 = tin[1]; + l2c(tout1, out); + } + l2c(tout0, iv); + l2c(tout1, iv); + } else { + c2l(iv, xor0); + c2l(iv, xor1); + iv -= 8; + for (l -= 8; l >= 0; l -= 8) { + c2l(in, tin0); + tin[0] = tin0; + c2l(in, tin1); + tin[1] = tin1; + RC2_decrypt(tin, ks); + tout0 = tin[0] ^ xor0; + tout1 = tin[1] ^ xor1; + l2c(tout0, out); + l2c(tout1, out); + xor0 = tin0; + xor1 = tin1; + } + if (l != -8) { + c2l(in, tin0); + tin[0] = tin0; + c2l(in, tin1); + tin[1] = tin1; + RC2_decrypt(tin, ks); + tout0 = tin[0] ^ xor0; + tout1 = tin[1] ^ xor1; + l2cn(tout0, tout1, out, l + 8); + xor0 = tin0; + xor1 = tin1; + } + l2c(xor0, iv); + l2c(xor1, iv); + } + tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; + tin[0] = tin[1] = 0; +} + +void RC2_encrypt(unsigned long *d, RC2_KEY *key) +{ + int i, n; + register RC2_INT *p0, *p1; + register RC2_INT x0, x1, x2, x3, t; + unsigned long l; + + l = d[0]; + x0 = (RC2_INT) l & 0xffff; + x1 = (RC2_INT) (l >> 16L); + l = d[1]; + x2 = (RC2_INT) l & 0xffff; + x3 = (RC2_INT) (l >> 16L); + + n = 3; + i = 5; + + p0 = p1 = &(key->data[0]); + for (;;) { + t = (x0 + (x1 & ~x3) + (x2 & x3) + *(p0++)) & 0xffff; + x0 = (t << 1) | (t >> 15); + t = (x1 + (x2 & ~x0) + (x3 & x0) + *(p0++)) & 0xffff; + x1 = (t << 2) | (t >> 14); + t = (x2 + (x3 & ~x1) + (x0 & x1) + *(p0++)) & 0xffff; + x2 = (t << 3) | (t >> 13); + t = (x3 + (x0 & ~x2) + (x1 & x2) + *(p0++)) & 0xffff; + x3 = (t << 5) | (t >> 11); + + if (--i == 0) { + if (--n == 0) + break; + i = (n == 2) ? 6 : 5; + + x0 += p1[x3 & 0x3f]; + x1 += p1[x0 & 0x3f]; + x2 += p1[x1 & 0x3f]; + x3 += p1[x2 & 0x3f]; + } + } + + d[0] = + (unsigned long)(x0 & 0xffff) | ((unsigned long)(x1 & 0xffff) << 16L); + d[1] = + (unsigned long)(x2 & 0xffff) | ((unsigned long)(x3 & 0xffff) << 16L); +} + +void RC2_decrypt(unsigned long *d, RC2_KEY *key) +{ + int i, n; + register RC2_INT *p0, *p1; + register RC2_INT x0, x1, x2, x3, t; + unsigned long l; + + l = d[0]; + x0 = (RC2_INT) l & 0xffff; + x1 = (RC2_INT) (l >> 16L); + l = d[1]; + x2 = (RC2_INT) l & 0xffff; + x3 = (RC2_INT) (l >> 16L); + + n = 3; + i = 5; + + p0 = &(key->data[63]); + p1 = &(key->data[0]); + for (;;) { + t = ((x3 << 11) | (x3 >> 5)) & 0xffff; + x3 = (t - (x0 & ~x2) - (x1 & x2) - *(p0--)) & 0xffff; + t = ((x2 << 13) | (x2 >> 3)) & 0xffff; + x2 = (t - (x3 & ~x1) - (x0 & x1) - *(p0--)) & 0xffff; + t = ((x1 << 14) | (x1 >> 2)) & 0xffff; + x1 = (t - (x2 & ~x0) - (x3 & x0) - *(p0--)) & 0xffff; + t = ((x0 << 15) | (x0 >> 1)) & 0xffff; + x0 = (t - (x1 & ~x3) - (x2 & x3) - *(p0--)) & 0xffff; + + if (--i == 0) { + if (--n == 0) + break; + i = (n == 2) ? 6 : 5; + + x3 = (x3 - p1[x2 & 0x3f]) & 0xffff; + x2 = (x2 - p1[x1 & 0x3f]) & 0xffff; + x1 = (x1 - p1[x0 & 0x3f]) & 0xffff; + x0 = (x0 - p1[x3 & 0x3f]) & 0xffff; + } + } + + d[0] = + (unsigned long)(x0 & 0xffff) | ((unsigned long)(x1 & 0xffff) << 16L); + d[1] = + (unsigned long)(x2 & 0xffff) | ((unsigned long)(x3 & 0xffff) << 16L); +} |