diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/cast/c_enc.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/cast/c_enc.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/cast/c_enc.c b/openssl-1.1.0h/crypto/cast/c_enc.c new file mode 100644 index 0000000..700b6d1 --- /dev/null +++ b/openssl-1.1.0h/crypto/cast/c_enc.c @@ -0,0 +1,151 @@ +/* + * 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/cast.h> +#include "cast_lcl.h" + +void CAST_encrypt(CAST_LONG *data, const CAST_KEY *key) +{ + CAST_LONG l, r, t; + const CAST_LONG *k; + + k = &(key->data[0]); + l = data[0]; + r = data[1]; + + E_CAST(0, k, l, r, +, ^, -); + E_CAST(1, k, r, l, ^, -, +); + E_CAST(2, k, l, r, -, +, ^); + E_CAST(3, k, r, l, +, ^, -); + E_CAST(4, k, l, r, ^, -, +); + E_CAST(5, k, r, l, -, +, ^); + E_CAST(6, k, l, r, +, ^, -); + E_CAST(7, k, r, l, ^, -, +); + E_CAST(8, k, l, r, -, +, ^); + E_CAST(9, k, r, l, +, ^, -); + E_CAST(10, k, l, r, ^, -, +); + E_CAST(11, k, r, l, -, +, ^); + if (!key->short_key) { + E_CAST(12, k, l, r, +, ^, -); + E_CAST(13, k, r, l, ^, -, +); + E_CAST(14, k, l, r, -, +, ^); + E_CAST(15, k, r, l, +, ^, -); + } + + data[1] = l & 0xffffffffL; + data[0] = r & 0xffffffffL; +} + +void CAST_decrypt(CAST_LONG *data, const CAST_KEY *key) +{ + CAST_LONG l, r, t; + const CAST_LONG *k; + + k = &(key->data[0]); + l = data[0]; + r = data[1]; + + if (!key->short_key) { + E_CAST(15, k, l, r, +, ^, -); + E_CAST(14, k, r, l, -, +, ^); + E_CAST(13, k, l, r, ^, -, +); + E_CAST(12, k, r, l, +, ^, -); + } + E_CAST(11, k, l, r, -, +, ^); + E_CAST(10, k, r, l, ^, -, +); + E_CAST(9, k, l, r, +, ^, -); + E_CAST(8, k, r, l, -, +, ^); + E_CAST(7, k, l, r, ^, -, +); + E_CAST(6, k, r, l, +, ^, -); + E_CAST(5, k, l, r, -, +, ^); + E_CAST(4, k, r, l, ^, -, +); + E_CAST(3, k, l, r, +, ^, -); + E_CAST(2, k, r, l, -, +, ^); + E_CAST(1, k, l, r, ^, -, +); + E_CAST(0, k, r, l, +, ^, -); + + data[1] = l & 0xffffffffL; + data[0] = r & 0xffffffffL; +} + +void CAST_cbc_encrypt(const unsigned char *in, unsigned char *out, + long length, const CAST_KEY *ks, unsigned char *iv, + int enc) +{ + register CAST_LONG tin0, tin1; + register CAST_LONG tout0, tout1, xor0, xor1; + register long l = length; + CAST_LONG tin[2]; + + if (enc) { + n2l(iv, tout0); + n2l(iv, tout1); + iv -= 8; + for (l -= 8; l >= 0; l -= 8) { + n2l(in, tin0); + n2l(in, tin1); + tin0 ^= tout0; + tin1 ^= tout1; + tin[0] = tin0; + tin[1] = tin1; + CAST_encrypt(tin, ks); + tout0 = tin[0]; + tout1 = tin[1]; + l2n(tout0, out); + l2n(tout1, out); + } + if (l != -8) { + n2ln(in, tin0, tin1, l + 8); + tin0 ^= tout0; + tin1 ^= tout1; + tin[0] = tin0; + tin[1] = tin1; + CAST_encrypt(tin, ks); + tout0 = tin[0]; + tout1 = tin[1]; + l2n(tout0, out); + l2n(tout1, out); + } + l2n(tout0, iv); + l2n(tout1, iv); + } else { + n2l(iv, xor0); + n2l(iv, xor1); + iv -= 8; + for (l -= 8; l >= 0; l -= 8) { + n2l(in, tin0); + n2l(in, tin1); + tin[0] = tin0; + tin[1] = tin1; + CAST_decrypt(tin, ks); + tout0 = tin[0] ^ xor0; + tout1 = tin[1] ^ xor1; + l2n(tout0, out); + l2n(tout1, out); + xor0 = tin0; + xor1 = tin1; + } + if (l != -8) { + n2l(in, tin0); + n2l(in, tin1); + tin[0] = tin0; + tin[1] = tin1; + CAST_decrypt(tin, ks); + tout0 = tin[0] ^ xor0; + tout1 = tin[1] ^ xor1; + l2nn(tout0, tout1, out, l + 8); + xor0 = tin0; + xor1 = tin1; + } + l2n(xor0, iv); + l2n(xor1, iv); + } + tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; + tin[0] = tin[1] = 0; +} |