| File: | out/../deps/openssl/openssl/crypto/cast/c_cfb64.c |
| Warning: | line 78, column 10 Although the value stored to 'v1' is used in the enclosing expression, the value is never actually read from 'v1' |
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| 1 | /* |
| 2 | * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. |
| 3 | * |
| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
| 5 | * this file except in compliance with the License. You can obtain a copy |
| 6 | * in the file LICENSE in the source distribution or at |
| 7 | * https://www.openssl.org/source/license.html |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * CAST low level APIs are deprecated for public use, but still ok for |
| 12 | * internal use. |
| 13 | */ |
| 14 | #include "internal/deprecated.h" |
| 15 | |
| 16 | #include <openssl/cast.h> |
| 17 | #include "cast_local.h" |
| 18 | |
| 19 | /* |
| 20 | * The input and output encrypted as though 64bit cfb mode is being used. |
| 21 | * The extra state information to record how much of the 64bit block we have |
| 22 | * used is contained in *num; |
| 23 | */ |
| 24 | |
| 25 | void CAST_cfb64_encrypt(const unsigned char *in, unsigned char *out, |
| 26 | long length, const CAST_KEY *schedule, |
| 27 | unsigned char *ivec, int *num, int enc) |
| 28 | { |
| 29 | register CAST_LONGunsigned int v0, v1, t; |
| 30 | register int n = *num; |
| 31 | register long l = length; |
| 32 | CAST_LONGunsigned int ti[2]; |
| 33 | unsigned char *iv, c, cc; |
| 34 | |
| 35 | iv = ivec; |
| 36 | if (enc) { |
| 37 | while (l--) { |
| 38 | if (n == 0) { |
| 39 | n2l(iv, v0)(v0 =((unsigned long)(*((iv)++)))<<24L, v0|=((unsigned long )(*((iv)++)))<<16L, v0|=((unsigned long)(*((iv)++)))<< 8L, v0|=((unsigned long)(*((iv)++)))); |
| 40 | ti[0] = v0; |
| 41 | n2l(iv, v1)(v1 =((unsigned long)(*((iv)++)))<<24L, v1|=((unsigned long )(*((iv)++)))<<16L, v1|=((unsigned long)(*((iv)++)))<< 8L, v1|=((unsigned long)(*((iv)++)))); |
| 42 | ti[1] = v1; |
| 43 | CAST_encrypt((CAST_LONGunsigned int *)ti, schedule); |
| 44 | iv = ivec; |
| 45 | t = ti[0]; |
| 46 | l2n(t, iv)(*((iv)++)=(unsigned char)(((t)>>24L)&0xff), *((iv) ++)=(unsigned char)(((t)>>16L)&0xff), *((iv)++)=(unsigned char)(((t)>> 8L)&0xff), *((iv)++)=(unsigned char)( ((t) )&0xff)); |
| 47 | t = ti[1]; |
| 48 | l2n(t, iv)(*((iv)++)=(unsigned char)(((t)>>24L)&0xff), *((iv) ++)=(unsigned char)(((t)>>16L)&0xff), *((iv)++)=(unsigned char)(((t)>> 8L)&0xff), *((iv)++)=(unsigned char)( ((t) )&0xff)); |
| 49 | iv = ivec; |
| 50 | } |
| 51 | c = *(in++) ^ iv[n]; |
| 52 | *(out++) = c; |
| 53 | iv[n] = c; |
| 54 | n = (n + 1) & 0x07; |
| 55 | } |
| 56 | } else { |
| 57 | while (l--) { |
| 58 | if (n == 0) { |
| 59 | n2l(iv, v0)(v0 =((unsigned long)(*((iv)++)))<<24L, v0|=((unsigned long )(*((iv)++)))<<16L, v0|=((unsigned long)(*((iv)++)))<< 8L, v0|=((unsigned long)(*((iv)++)))); |
| 60 | ti[0] = v0; |
| 61 | n2l(iv, v1)(v1 =((unsigned long)(*((iv)++)))<<24L, v1|=((unsigned long )(*((iv)++)))<<16L, v1|=((unsigned long)(*((iv)++)))<< 8L, v1|=((unsigned long)(*((iv)++)))); |
| 62 | ti[1] = v1; |
| 63 | CAST_encrypt((CAST_LONGunsigned int *)ti, schedule); |
| 64 | iv = ivec; |
| 65 | t = ti[0]; |
| 66 | l2n(t, iv)(*((iv)++)=(unsigned char)(((t)>>24L)&0xff), *((iv) ++)=(unsigned char)(((t)>>16L)&0xff), *((iv)++)=(unsigned char)(((t)>> 8L)&0xff), *((iv)++)=(unsigned char)( ((t) )&0xff)); |
| 67 | t = ti[1]; |
| 68 | l2n(t, iv)(*((iv)++)=(unsigned char)(((t)>>24L)&0xff), *((iv) ++)=(unsigned char)(((t)>>16L)&0xff), *((iv)++)=(unsigned char)(((t)>> 8L)&0xff), *((iv)++)=(unsigned char)( ((t) )&0xff)); |
| 69 | iv = ivec; |
| 70 | } |
| 71 | cc = *(in++); |
| 72 | c = iv[n]; |
| 73 | iv[n] = cc; |
| 74 | *(out++) = c ^ cc; |
| 75 | n = (n + 1) & 0x07; |
| 76 | } |
| 77 | } |
| 78 | v0 = v1 = ti[0] = ti[1] = t = c = cc = 0; |
Although the value stored to 'v1' is used in the enclosing expression, the value is never actually read from 'v1' | |
| 79 | *num = n; |
| 80 | } |