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| author | Jeffrey Walton <noloader@gmail.com> | 2015-11-05 01:59:46 -0500 |
|---|---|---|
| committer | Jeffrey Walton <noloader@gmail.com> | 2015-11-05 01:59:46 -0500 |
| commit | 48809d4e85c125814425c621d8d0d89f95405924 (patch) | |
| tree | 1010fd16c4b1199f3d27dd726dda241a2bd29f83 /blowfish.cpp | |
| parent | 025337a94aceb75d188149db70c2094673772816 (diff) | |
| download | cryptopp-git-48809d4e85c125814425c621d8d0d89f95405924.tar.gz | |
CRYPTOPP 5.6.3 RC6 checkin
Diffstat (limited to 'blowfish.cpp')
| -rw-r--r-- | blowfish.cpp | 198 |
1 files changed, 99 insertions, 99 deletions
diff --git a/blowfish.cpp b/blowfish.cpp index 0e95d3ea..7fe9a56f 100644 --- a/blowfish.cpp +++ b/blowfish.cpp @@ -1,99 +1,99 @@ -// blowfish.cpp - written and placed in the public domain by Wei Dai - -#include "pch.h" -#include "blowfish.h" -#include "misc.h" - -NAMESPACE_BEGIN(CryptoPP) - -void Blowfish::Base::UncheckedSetKey(const byte *key_string, unsigned int keylength, const NameValuePairs &) -{ - AssertValidKeyLength(keylength); - - unsigned i, j=0, k; - word32 data, dspace[2] = {0, 0}; - - memcpy(pbox, p_init, sizeof(p_init)); - memcpy(sbox, s_init, sizeof(s_init)); - - // Xor key string into encryption key vector - for (i=0 ; i<static_cast<unsigned int>(ROUNDS)+2 ; ++i) - { - data = 0 ; - for (k=0 ; k<4 ; ++k ) - data = (data << 8) | key_string[j++ % keylength]; - pbox[i] ^= data; - } - - crypt_block(dspace, pbox); - - for (i=0; i<static_cast<unsigned int>(ROUNDS); i+=2) - crypt_block(pbox+i, pbox+i+2); - - crypt_block(pbox+ROUNDS, sbox); - - for (i=0; i<4*256-2; i+=2) - crypt_block(sbox+i, sbox+i+2); - - if (!IsForwardTransformation()) - for (i=0; i<(static_cast<unsigned int>(ROUNDS)+2)/2; i++) - std::swap(pbox[i], pbox[ROUNDS+1-i]); -} - -// this version is only used to make pbox and sbox -void Blowfish::Base::crypt_block(const word32 in[2], word32 out[2]) const -{ - word32 left = in[0]; - word32 right = in[1]; - - const word32 *const s=sbox; - const word32 *p=pbox; - - left ^= p[0]; - - for (unsigned i=0; i<ROUNDS/2; i++) - { - right ^= (((s[GETBYTE(left,3)] + s[256+GETBYTE(left,2)]) - ^ s[2*256+GETBYTE(left,1)]) + s[3*256+GETBYTE(left,0)]) - ^ p[2*i+1]; - - left ^= (((s[GETBYTE(right,3)] + s[256+GETBYTE(right,2)]) - ^ s[2*256+GETBYTE(right,1)]) + s[3*256+GETBYTE(right,0)]) - ^ p[2*i+2]; - } - - right ^= p[ROUNDS+1]; - - out[0] = right; - out[1] = left; -} - -void Blowfish::Base::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - typedef BlockGetAndPut<word32, BigEndian> Block; - - word32 left, right; - Block::Get(inBlock)(left)(right); - - const word32 *const s=sbox; - const word32 *p=pbox; - - left ^= p[0]; - - for (unsigned i=0; i<ROUNDS/2; i++) - { - right ^= (((s[GETBYTE(left,3)] + s[256+GETBYTE(left,2)]) - ^ s[2*256+GETBYTE(left,1)]) + s[3*256+GETBYTE(left,0)]) - ^ p[2*i+1]; - - left ^= (((s[GETBYTE(right,3)] + s[256+GETBYTE(right,2)]) - ^ s[2*256+GETBYTE(right,1)]) + s[3*256+GETBYTE(right,0)]) - ^ p[2*i+2]; - } - - right ^= p[ROUNDS+1]; - - Block::Put(xorBlock, outBlock)(right)(left); -} - -NAMESPACE_END +// blowfish.cpp - written and placed in the public domain by Wei Dai
+
+#include "pch.h"
+#include "blowfish.h"
+#include "misc.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+void Blowfish::Base::UncheckedSetKey(const byte *key_string, unsigned int keylength, const NameValuePairs &)
+{
+ AssertValidKeyLength(keylength);
+
+ unsigned i, j=0, k;
+ word32 data, dspace[2] = {0, 0};
+
+ memcpy(pbox, p_init, sizeof(p_init));
+ memcpy(sbox, s_init, sizeof(s_init));
+
+ // Xor key string into encryption key vector
+ for (i=0 ; i<ROUNDS+2 ; ++i)
+ {
+ data = 0 ;
+ for (k=0 ; k<4 ; ++k )
+ data = (data << 8) | key_string[j++ % keylength];
+ pbox[i] ^= data;
+ }
+
+ crypt_block(dspace, pbox);
+
+ for (i=0; i<ROUNDS; i+=2)
+ crypt_block(pbox+i, pbox+i+2);
+
+ crypt_block(pbox+ROUNDS, sbox);
+
+ for (i=0; i<4*256-2; i+=2)
+ crypt_block(sbox+i, sbox+i+2);
+
+ if (!IsForwardTransformation())
+ for (i=0; i<(ROUNDS+2)/2; i++)
+ std::swap(pbox[i], pbox[ROUNDS+1-i]);
+}
+
+// this version is only used to make pbox and sbox
+void Blowfish::Base::crypt_block(const word32 in[2], word32 out[2]) const
+{
+ word32 left = in[0];
+ word32 right = in[1];
+
+ const word32 *const s=sbox;
+ const word32 *p=pbox;
+
+ left ^= p[0];
+
+ for (unsigned i=0; i<ROUNDS/2; i++)
+ {
+ right ^= (((s[GETBYTE(left,3)] + s[256+GETBYTE(left,2)])
+ ^ s[2*256+GETBYTE(left,1)]) + s[3*256+GETBYTE(left,0)])
+ ^ p[2*i+1];
+
+ left ^= (((s[GETBYTE(right,3)] + s[256+GETBYTE(right,2)])
+ ^ s[2*256+GETBYTE(right,1)]) + s[3*256+GETBYTE(right,0)])
+ ^ p[2*i+2];
+ }
+
+ right ^= p[ROUNDS+1];
+
+ out[0] = right;
+ out[1] = left;
+}
+
+void Blowfish::Base::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
+{
+ typedef BlockGetAndPut<word32, BigEndian> Block;
+
+ word32 left, right;
+ Block::Get(inBlock)(left)(right);
+
+ const word32 *const s=sbox;
+ const word32 *p=pbox;
+
+ left ^= p[0];
+
+ for (unsigned i=0; i<ROUNDS/2; i++)
+ {
+ right ^= (((s[GETBYTE(left,3)] + s[256+GETBYTE(left,2)])
+ ^ s[2*256+GETBYTE(left,1)]) + s[3*256+GETBYTE(left,0)])
+ ^ p[2*i+1];
+
+ left ^= (((s[GETBYTE(right,3)] + s[256+GETBYTE(right,2)])
+ ^ s[2*256+GETBYTE(right,1)]) + s[3*256+GETBYTE(right,0)])
+ ^ p[2*i+2];
+ }
+
+ right ^= p[ROUNDS+1];
+
+ Block::Put(xorBlock, outBlock)(right)(left);
+}
+
+NAMESPACE_END
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