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author | Wojtek Kosior <wk@koszkonutek-tmp.pl.eu.org> | 2021-04-30 00:33:56 +0200 |
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committer | Wojtek Kosior <wk@koszkonutek-tmp.pl.eu.org> | 2021-04-30 00:33:56 +0200 |
commit | aa4d426b4d3527d7e166df1a05058c9a4a0f6683 (patch) | |
tree | 4ff17ce8b89a2321b9d0ed4bcfc37c447bcb6820 /openssl-1.1.0h/crypto/des/cfb64enc.c | |
download | smtps-and-pop3s-console-program-master.tar.gz smtps-and-pop3s-console-program-master.zip |
Diffstat (limited to 'openssl-1.1.0h/crypto/des/cfb64enc.c')
-rw-r--r-- | openssl-1.1.0h/crypto/des/cfb64enc.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/des/cfb64enc.c b/openssl-1.1.0h/crypto/des/cfb64enc.c new file mode 100644 index 0000000..96de51b --- /dev/null +++ b/openssl-1.1.0h/crypto/des/cfb64enc.c @@ -0,0 +1,73 @@ +/* + * 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 "des_locl.h" + +/* + * The input and output encrypted as though 64bit cfb mode is being used. + * The extra state information to record how much of the 64bit block we have + * used is contained in *num; + */ + +void DES_cfb64_encrypt(const unsigned char *in, unsigned char *out, + long length, DES_key_schedule *schedule, + DES_cblock *ivec, int *num, int enc) +{ + register DES_LONG v0, v1; + register long l = length; + register int n = *num; + DES_LONG ti[2]; + unsigned char *iv, c, cc; + + iv = &(*ivec)[0]; + if (enc) { + while (l--) { + if (n == 0) { + c2l(iv, v0); + ti[0] = v0; + c2l(iv, v1); + ti[1] = v1; + DES_encrypt1(ti, schedule, DES_ENCRYPT); + iv = &(*ivec)[0]; + v0 = ti[0]; + l2c(v0, iv); + v0 = ti[1]; + l2c(v0, iv); + iv = &(*ivec)[0]; + } + c = *(in++) ^ iv[n]; + *(out++) = c; + iv[n] = c; + n = (n + 1) & 0x07; + } + } else { + while (l--) { + if (n == 0) { + c2l(iv, v0); + ti[0] = v0; + c2l(iv, v1); + ti[1] = v1; + DES_encrypt1(ti, schedule, DES_ENCRYPT); + iv = &(*ivec)[0]; + v0 = ti[0]; + l2c(v0, iv); + v0 = ti[1]; + l2c(v0, iv); + iv = &(*ivec)[0]; + } + cc = *(in++); + c = iv[n]; + iv[n] = cc; + *(out++) = c ^ cc; + n = (n + 1) & 0x07; + } + } + v0 = v1 = ti[0] = ti[1] = c = cc = 0; + *num = n; +} |