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bf_cbc.c (55714) bf_cbc.c (59191)
1/* crypto/bf/bf_cbc.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *

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54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <openssl/blowfish.h>
60#include "bf_locl.h"
61
1/* crypto/bf/bf_cbc.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *

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54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <openssl/blowfish.h>
60#include "bf_locl.h"
61
62void BF_cbc_encrypt(unsigned char *in, unsigned char *out, long length,
63 BF_KEY *ks, unsigned char *iv, int encrypt)
62void BF_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
63 const BF_KEY *schedule, unsigned char *ivec, int encrypt)
64 {
65 register BF_LONG tin0,tin1;
66 register BF_LONG tout0,tout1,xor0,xor1;
67 register long l=length;
68 BF_LONG tin[2];
69
70 if (encrypt)
71 {
64 {
65 register BF_LONG tin0,tin1;
66 register BF_LONG tout0,tout1,xor0,xor1;
67 register long l=length;
68 BF_LONG tin[2];
69
70 if (encrypt)
71 {
72 n2l(iv,tout0);
73 n2l(iv,tout1);
74 iv-=8;
72 n2l(ivec,tout0);
73 n2l(ivec,tout1);
74 ivec-=8;
75 for (l-=8; l>=0; l-=8)
76 {
77 n2l(in,tin0);
78 n2l(in,tin1);
79 tin0^=tout0;
80 tin1^=tout1;
81 tin[0]=tin0;
82 tin[1]=tin1;
75 for (l-=8; l>=0; l-=8)
76 {
77 n2l(in,tin0);
78 n2l(in,tin1);
79 tin0^=tout0;
80 tin1^=tout1;
81 tin[0]=tin0;
82 tin[1]=tin1;
83 BF_encrypt(tin,ks);
83 BF_encrypt(tin,schedule);
84 tout0=tin[0];
85 tout1=tin[1];
86 l2n(tout0,out);
87 l2n(tout1,out);
88 }
89 if (l != -8)
90 {
91 n2ln(in,tin0,tin1,l+8);
92 tin0^=tout0;
93 tin1^=tout1;
94 tin[0]=tin0;
95 tin[1]=tin1;
84 tout0=tin[0];
85 tout1=tin[1];
86 l2n(tout0,out);
87 l2n(tout1,out);
88 }
89 if (l != -8)
90 {
91 n2ln(in,tin0,tin1,l+8);
92 tin0^=tout0;
93 tin1^=tout1;
94 tin[0]=tin0;
95 tin[1]=tin1;
96 BF_encrypt(tin,ks);
96 BF_encrypt(tin,schedule);
97 tout0=tin[0];
98 tout1=tin[1];
99 l2n(tout0,out);
100 l2n(tout1,out);
101 }
97 tout0=tin[0];
98 tout1=tin[1];
99 l2n(tout0,out);
100 l2n(tout1,out);
101 }
102 l2n(tout0,iv);
103 l2n(tout1,iv);
102 l2n(tout0,ivec);
103 l2n(tout1,ivec);
104 }
105 else
106 {
104 }
105 else
106 {
107 n2l(iv,xor0);
108 n2l(iv,xor1);
109 iv-=8;
107 n2l(ivec,xor0);
108 n2l(ivec,xor1);
109 ivec-=8;
110 for (l-=8; l>=0; l-=8)
111 {
112 n2l(in,tin0);
113 n2l(in,tin1);
114 tin[0]=tin0;
115 tin[1]=tin1;
110 for (l-=8; l>=0; l-=8)
111 {
112 n2l(in,tin0);
113 n2l(in,tin1);
114 tin[0]=tin0;
115 tin[1]=tin1;
116 BF_decrypt(tin,ks);
116 BF_decrypt(tin,schedule);
117 tout0=tin[0]^xor0;
118 tout1=tin[1]^xor1;
119 l2n(tout0,out);
120 l2n(tout1,out);
121 xor0=tin0;
122 xor1=tin1;
123 }
124 if (l != -8)
125 {
126 n2l(in,tin0);
127 n2l(in,tin1);
128 tin[0]=tin0;
129 tin[1]=tin1;
117 tout0=tin[0]^xor0;
118 tout1=tin[1]^xor1;
119 l2n(tout0,out);
120 l2n(tout1,out);
121 xor0=tin0;
122 xor1=tin1;
123 }
124 if (l != -8)
125 {
126 n2l(in,tin0);
127 n2l(in,tin1);
128 tin[0]=tin0;
129 tin[1]=tin1;
130 BF_decrypt(tin,ks);
130 BF_decrypt(tin,schedule);
131 tout0=tin[0]^xor0;
132 tout1=tin[1]^xor1;
133 l2nn(tout0,tout1,out,l+8);
134 xor0=tin0;
135 xor1=tin1;
136 }
131 tout0=tin[0]^xor0;
132 tout1=tin[1]^xor1;
133 l2nn(tout0,tout1,out,l+8);
134 xor0=tin0;
135 xor1=tin1;
136 }
137 l2n(xor0,iv);
138 l2n(xor1,iv);
137 l2n(xor0,ivec);
138 l2n(xor1,ivec);
139 }
140 tin0=tin1=tout0=tout1=xor0=xor1=0;
141 tin[0]=tin[1]=0;
142 }
143
139 }
140 tin0=tin1=tout0=tout1=xor0=xor1=0;
141 tin[0]=tin[1]=0;
142 }
143