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[PuTTY_svn.git] / sshdes.c

diff --git a/sshdes.c b/sshdes.c
index 81aee8ba0594643a0bb5ac77d8b8102ad40e7c2d..f54990e7ceac2f359b1de1cfe90fd590ad397a95 100644 (file)
--- a/sshdes.c
+++ b/sshdes.c
@@ -1031,3 +1031,58 @@ const struct ssh_cipher ssh_des = {
     des_encrypt_blk, des_decrypt_blk,
     8, "single-DES CBC"
 };
+
+#ifdef TEST_XDM_AUTH
+
+/*
+ * Small standalone utility which allows encryption and decryption of
+ * single cipher blocks in the XDM-AUTHORIZATION-1 style. Written
+ * during the rework of X authorisation for connection sharing, to
+ * check the corner case when xa1_firstblock matches but the rest of
+ * the authorisation is bogus.
+ *
+ * Just compile this file on its own with the above ifdef symbol
+ * predefined:
+
+gcc -DTEST_XDM_AUTH -o sshdes sshdes.c
+
+ */
+
+#include <stdlib.h>
+void *safemalloc(size_t n, size_t size) { return calloc(n, size); }
+void safefree(void *p) { return free(p); }
+void smemclr(void *p, size_t size) { memset(p, 0, size); }
+int main(int argc, char **argv)
+{
+    unsigned char words[2][8];
+    unsigned char out[8];
+    int i, j;
+
+    memset(words, 0, sizeof(words));
+
+    for (i = 0; i < 2; i++) {
+        for (j = 0; j < 8 && argv[i+1][2*j]; j++) {
+            char x[3];
+            unsigned u;
+            x[0] = argv[i+1][2*j];
+            x[1] = argv[i+1][2*j+1];
+            x[2] = 0;
+            sscanf(x, "%02x", &u);
+            words[i][j] = u;
+        }
+    }
+
+    memcpy(out, words[0], 8);
+    des_decrypt_xdmauth(words[1], out, 8);
+    printf("decrypt(%s,%s) = ", argv[1], argv[2]);
+    for (i = 0; i < 8; i++) printf("%02x", out[i]);
+    printf("\n");
+
+    memcpy(out, words[0], 8);
+    des_encrypt_xdmauth(words[1], out, 8);
+    printf("encrypt(%s,%s) = ", argv[1], argv[2]);
+    for (i = 0; i < 8; i++) printf("%02x", out[i]);
+    printf("\n");
+}
+
+#endif