Index: fusl/src/crypt/encrypt.c |
diff --git a/fusl/src/crypt/encrypt.c b/fusl/src/crypt/encrypt.c |
new file mode 100644 |
index 0000000000000000000000000000000000000000..9332a6dee10a56f40b800af37bbb404d80737daa |
--- /dev/null |
+++ b/fusl/src/crypt/encrypt.c |
@@ -0,0 +1,60 @@ |
+#include <stdint.h> |
+#include <stdlib.h> |
+#include <unistd.h> |
+ |
+struct expanded_key { |
+ uint32_t l[16], r[16]; |
+}; |
+ |
+void __des_setkey(const unsigned char *key, struct expanded_key *ekey); |
+void __do_des(uint32_t l_in, uint32_t r_in, |
+ uint32_t *l_out, uint32_t *r_out, |
+ uint32_t count, uint32_t saltbits, const struct expanded_key *ekey); |
+ |
+ |
+static struct expanded_key __encrypt_key; |
+ |
+void setkey(const char *key) |
+{ |
+ unsigned char bkey[8]; |
+ int i, j; |
+ |
+ for (i = 0; i < 8; i++) { |
+ bkey[i] = 0; |
+ for (j = 7; j >= 0; j--, key++) |
+ bkey[i] |= (uint32_t)(*key & 1) << j; |
+ } |
+ |
+ __des_setkey(bkey, &__encrypt_key); |
+} |
+ |
+void encrypt(char *block, int edflag) |
+{ |
+ struct expanded_key decrypt_key, *key; |
+ uint32_t b[2]; |
+ int i, j; |
+ char *p; |
+ |
+ p = block; |
+ for (i = 0; i < 2; i++) { |
+ b[i] = 0; |
+ for (j = 31; j >= 0; j--, p++) |
+ b[i] |= (uint32_t)(*p & 1) << j; |
+ } |
+ |
+ key = &__encrypt_key; |
+ if (edflag) { |
+ key = &decrypt_key; |
+ for (i = 0; i < 16; i++) { |
+ decrypt_key.l[i] = __encrypt_key.l[15-i]; |
+ decrypt_key.r[i] = __encrypt_key.r[15-i]; |
+ } |
+ } |
+ |
+ __do_des(b[0], b[1], b, b + 1, 1, 0, key); |
+ |
+ p = block; |
+ for (i = 0; i < 2; i++) |
+ for (j = 31; j >= 0; j--) |
+ *p++ = b[i]>>j & 1; |
+} |