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authorRuan HE <ruan.he@orange.com>2015-09-04 07:35:06 +0000
committerGerrit Code Review <gerrit@172.30.200.206>2015-09-04 07:35:06 +0000
commitca6aa8198d2335f8c326c3dd4d26bf5899064214 (patch)
tree6274a2d971fc0cac0896efe8583927d0190e3d20 /moon-abe/cpabe-0.11/dec.c
parent92fd2dbfb672d7b2b1cdfd5dd5cf89f7716b3e12 (diff)
parent3baeb11a8fbcfcdbc31976d421f17b85503b3ecd (diff)
Merge "init attribute-based encryption"
Diffstat (limited to 'moon-abe/cpabe-0.11/dec.c')
-rw-r--r--moon-abe/cpabe-0.11/dec.c173
1 files changed, 173 insertions, 0 deletions
diff --git a/moon-abe/cpabe-0.11/dec.c b/moon-abe/cpabe-0.11/dec.c
new file mode 100644
index 00000000..218be2aa
--- /dev/null
+++ b/moon-abe/cpabe-0.11/dec.c
@@ -0,0 +1,173 @@
+#include <assert.h>
+#include <string.h>
+#include <unistd.h>
+#include <glib.h>
+#include <pbc.h>
+#include <pbc_random.h>
+
+#include "bswabe.h"
+#include "common.h"
+
+
+char* usage =
+"Usage: cpabe-dec [OPTION ...] PUB_KEY PRIV_KEY FILE\n"
+"\n"
+"Decrypt FILE using private key PRIV_KEY and assuming public key\n"
+"PUB_KEY. If the name of FILE is X.cpabe, the decrypted file will\n"
+"be written as X and FILE will be removed. Otherwise the file will be\n"
+"decrypted in place. Use of the -o option overrides this\n"
+"behavior.\n"
+"\n"
+"Mandatory arguments to long options are mandatory for short options too.\n\n"
+" -h, --help print this message\n\n"
+" -v, --version print version information\n\n"
+" -k, --keep-input-file don't delete original file\n\n"
+" -o, --output FILE write output to FILE\n\n"
+" -d, --deterministic use deterministic \"random\" numbers\n"
+" (only for debugging)\n\n"
+/* " -s, --no-opt-sat pick an arbitrary way of satisfying the policy\n" */
+/* " (only for performance comparison)\n\n" */
+/* " -n, --naive-dec use slower decryption algorithm\n" */
+/* " (only for performance comparison)\n\n" */
+/* " -f, --flatten use slightly different decryption algorithm\n" */
+/* " (may result in higher or lower performance)\n\n" */
+/* " -r, --report-ops report numbers of group operations\n" */
+/* " (only for performance evaluation)\n\n" */
+"";
+
+/* enum { */
+/* DEC_NAIVE, */
+/* DEC_FLATTEN, */
+/* DEC_MERGE, */
+/* } dec_strategy = DEC_MERGE; */
+
+char* pub_file = 0;
+char* prv_file = 0;
+char* in_file = 0;
+char* out_file = 0;
+/* int no_opt_sat = 0; */
+/* int report_ops = 0; */
+int keep = 0;
+
+/* int num_pairings = 0; */
+/* int num_exps = 0; */
+/* int num_muls = 0; */
+
+void
+parse_args( int argc, char** argv )
+{
+ int i;
+
+ for( i = 1; i < argc; i++ )
+ if( !strcmp(argv[i], "-h") || !strcmp(argv[i], "--help") )
+ {
+ printf("%s", usage);
+ exit(0);
+ }
+ else if( !strcmp(argv[i], "-v") || !strcmp(argv[i], "--version") )
+ {
+ printf(CPABE_VERSION, "-dec");
+ exit(0);
+ }
+ else if( !strcmp(argv[i], "-k") || !strcmp(argv[i], "--keep-input-file") )
+ {
+ keep = 1;
+ }
+ else if( !strcmp(argv[i], "-o") || !strcmp(argv[i], "--output") )
+ {
+ if( ++i >= argc )
+ die(usage);
+ else
+ out_file = argv[i];
+ }
+ else if( !strcmp(argv[i], "-d") || !strcmp(argv[i], "--deterministic") )
+ {
+ pbc_random_set_deterministic(0);
+ }
+/* else if( !strcmp(argv[i], "-s") || !strcmp(argv[i], "--no-opt-sat") ) */
+/* { */
+/* no_opt_sat = 1; */
+/* } */
+/* else if( !strcmp(argv[i], "-n") || !strcmp(argv[i], "--naive-dec") ) */
+/* { */
+/* dec_strategy = DEC_NAIVE; */
+/* } */
+/* else if( !strcmp(argv[i], "-f") || !strcmp(argv[i], "--flatten") ) */
+/* { */
+/* dec_strategy = DEC_FLATTEN; */
+/* } */
+/* else if( !strcmp(argv[i], "-r") || !strcmp(argv[i], "--report-ops") ) */
+/* { */
+/* report_ops = 1; */
+/* } */
+ else if( !pub_file )
+ {
+ pub_file = argv[i];
+ }
+ else if( !prv_file )
+ {
+ prv_file = argv[i];
+ }
+ else if( !in_file )
+ {
+ in_file = argv[i];
+ }
+ else
+ die(usage);
+
+ if( !pub_file || !prv_file || !in_file )
+ die(usage);
+
+ if( !out_file )
+ {
+ if( strlen(in_file) > 6 &&
+ !strcmp(in_file + strlen(in_file) - 6, ".cpabe") )
+ out_file = g_strndup(in_file, strlen(in_file) - 6);
+ else
+ out_file = strdup(in_file);
+ }
+
+ if( keep && !strcmp(in_file, out_file) )
+ die("cannot keep input file when decrypting file in place (try -o)\n");
+}
+
+int
+main( int argc, char** argv )
+{
+ bswabe_pub_t* pub;
+ bswabe_prv_t* prv;
+ int file_len;
+ GByteArray* aes_buf;
+ GByteArray* plt;
+ GByteArray* cph_buf;
+ bswabe_cph_t* cph;
+ element_t m;
+
+ parse_args(argc, argv);
+
+ pub = bswabe_pub_unserialize(suck_file(pub_file), 1);
+ prv = bswabe_prv_unserialize(pub, suck_file(prv_file), 1);
+
+ read_cpabe_file(in_file, &cph_buf, &file_len, &aes_buf);
+
+ cph = bswabe_cph_unserialize(pub, cph_buf, 1);
+ if( !bswabe_dec(pub, prv, cph, m) )
+ die("%s", bswabe_error());
+ bswabe_cph_free(cph);
+ plt = aes_128_cbc_decrypt(aes_buf, m);
+ g_byte_array_set_size(plt, file_len);
+ g_byte_array_free(aes_buf, 1);
+
+ spit_file(out_file, plt, 1);
+
+ if( !keep )
+ unlink(in_file);
+
+ /* report ops if necessary */
+/* if( report_ops ) */
+/* printf("pairings: %5d\n" */
+/* "exponentiations: %5d\n" */
+/* "multiplications: %5d\n", num_pairings, num_exps, num_muls); */
+
+ return 0;
+}