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-rw-r--r--libtomcrypt/src/pk/dh/dh.c237
-rw-r--r--libtomcrypt/src/pk/dh/dh_check_pubkey.c65
-rw-r--r--libtomcrypt/src/pk/dh/dh_export.c62
-rw-r--r--libtomcrypt/src/pk/dh/dh_export_key.c47
-rw-r--r--libtomcrypt/src/pk/dh/dh_free.c28
-rw-r--r--libtomcrypt/src/pk/dh/dh_generate_key.c102
-rw-r--r--libtomcrypt/src/pk/dh/dh_import.c99
-rw-r--r--libtomcrypt/src/pk/dh/dh_set.c124
-rw-r--r--libtomcrypt/src/pk/dh/dh_set_pg_dhparam.c54
-rw-r--r--libtomcrypt/src/pk/dh/dh_shared_secret.c80
10 files changed, 898 insertions, 0 deletions
diff --git a/libtomcrypt/src/pk/dh/dh.c b/libtomcrypt/src/pk/dh/dh.c
new file mode 100644
index 0000000..763b007
--- /dev/null
+++ b/libtomcrypt/src/pk/dh/dh.c
@@ -0,0 +1,237 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+
+#include "tomcrypt.h"
+
+#ifdef LTC_MDH
+
+/* This holds the key settings. ***MUST*** be organized by size from smallest to largest. */
+const ltc_dh_set_type ltc_dh_sets[] = {
+#ifdef LTC_DH768
+{ /* 768-bit MODP Group 1 - https://tools.ietf.org/html/rfc7296#appendix-B.1 */
+ 96,
+ "DH-768",
+ "2",
+ "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
+ "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
+ "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
+ "E485B576625E7EC6F44C42E9A63A3620FFFFFFFFFFFFFFFF"
+},
+#endif
+#ifdef LTC_DH1024
+{ /* 1024-bit MODP Group 2 - https://tools.ietf.org/html/rfc7296#appendix-B.2 */
+ 128,
+ "DH-1024",
+ "2",
+ "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
+ "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
+ "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
+ "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
+ "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381"
+ "FFFFFFFFFFFFFFFF"
+},
+#endif
+#ifdef LTC_DH1536
+{ /* 1536-bit MODP Group 5 - https://tools.ietf.org/html/rfc3526#section-2 */
+ 192,
+ "DH-1536",
+ "2",
+ "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
+ "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
+ "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
+ "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
+ "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
+ "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"
+ "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
+ "670C354E4ABC9804F1746C08CA237327FFFFFFFFFFFFFFFF"
+},
+#endif
+#ifdef LTC_DH2048
+{ /* 2048-bit MODP Group 14 - https://tools.ietf.org/html/rfc3526#section-3 */
+ 256,
+ "DH-2048",
+ "2",
+ "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
+ "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
+ "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
+ "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
+ "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
+ "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"
+ "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
+ "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B"
+ "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"
+ "DE2BCBF6955817183995497CEA956AE515D2261898FA0510"
+ "15728E5A8AACAA68FFFFFFFFFFFFFFFF"
+},
+#endif
+#ifdef LTC_DH3072
+{ /* 3072-bit MODP Group 15 - https://tools.ietf.org/html/rfc3526#section-4 */
+ 384,
+ "DH-3072",
+ "2",
+ "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
+ "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
+ "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
+ "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
+ "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
+ "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"
+ "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
+ "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B"
+ "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"
+ "DE2BCBF6955817183995497CEA956AE515D2261898FA0510"
+ "15728E5A8AAAC42DAD33170D04507A33A85521ABDF1CBA64"
+ "ECFB850458DBEF0A8AEA71575D060C7DB3970F85A6E1E4C7"
+ "ABF5AE8CDB0933D71E8C94E04A25619DCEE3D2261AD2EE6B"
+ "F12FFA06D98A0864D87602733EC86A64521F2B18177B200C"
+ "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB31"
+ "43DB5BFCE0FD108E4B82D120A93AD2CAFFFFFFFFFFFFFFFF"
+},
+#endif
+#ifdef LTC_DH4096
+{ /* 4096-bit MODP Group 16 - https://tools.ietf.org/html/rfc3526#section-5 */
+ 512,
+ "DH-4096",
+ "2",
+ "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
+ "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
+ "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
+ "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
+ "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
+ "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"
+ "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
+ "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B"
+ "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"
+ "DE2BCBF6955817183995497CEA956AE515D2261898FA0510"
+ "15728E5A8AAAC42DAD33170D04507A33A85521ABDF1CBA64"
+ "ECFB850458DBEF0A8AEA71575D060C7DB3970F85A6E1E4C7"
+ "ABF5AE8CDB0933D71E8C94E04A25619DCEE3D2261AD2EE6B"
+ "F12FFA06D98A0864D87602733EC86A64521F2B18177B200C"
+ "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB31"
+ "43DB5BFCE0FD108E4B82D120A92108011A723C12A787E6D7"
+ "88719A10BDBA5B2699C327186AF4E23C1A946834B6150BDA"
+ "2583E9CA2AD44CE8DBBBC2DB04DE8EF92E8EFC141FBECAA6"
+ "287C59474E6BC05D99B2964FA090C3A2233BA186515BE7ED"
+ "1F612970CEE2D7AFB81BDD762170481CD0069127D5B05AA9"
+ "93B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934063199"
+ "FFFFFFFFFFFFFFFF"
+},
+#endif
+#ifdef LTC_DH6144
+{ /* 6144-bit MODP Group 17 - https://tools.ietf.org/html/rfc3526#section-6 */
+ 768,
+ "DH-6144",
+ "2",
+ "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
+ "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
+ "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
+ "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
+ "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
+ "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"
+ "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
+ "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B"
+ "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"
+ "DE2BCBF6955817183995497CEA956AE515D2261898FA0510"
+ "15728E5A8AAAC42DAD33170D04507A33A85521ABDF1CBA64"
+ "ECFB850458DBEF0A8AEA71575D060C7DB3970F85A6E1E4C7"
+ "ABF5AE8CDB0933D71E8C94E04A25619DCEE3D2261AD2EE6B"
+ "F12FFA06D98A0864D87602733EC86A64521F2B18177B200C"
+ "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB31"
+ "43DB5BFCE0FD108E4B82D120A92108011A723C12A787E6D7"
+ "88719A10BDBA5B2699C327186AF4E23C1A946834B6150BDA"
+ "2583E9CA2AD44CE8DBBBC2DB04DE8EF92E8EFC141FBECAA6"
+ "287C59474E6BC05D99B2964FA090C3A2233BA186515BE7ED"
+ "1F612970CEE2D7AFB81BDD762170481CD0069127D5B05AA9"
+ "93B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934028492"
+ "36C3FAB4D27C7026C1D4DCB2602646DEC9751E763DBA37BD"
+ "F8FF9406AD9E530EE5DB382F413001AEB06A53ED9027D831"
+ "179727B0865A8918DA3EDBEBCF9B14ED44CE6CBACED4BB1B"
+ "DB7F1447E6CC254B332051512BD7AF426FB8F401378CD2BF"
+ "5983CA01C64B92ECF032EA15D1721D03F482D7CE6E74FEF6"
+ "D55E702F46980C82B5A84031900B1C9E59E7C97FBEC7E8F3"
+ "23A97A7E36CC88BE0F1D45B7FF585AC54BD407B22B4154AA"
+ "CC8F6D7EBF48E1D814CC5ED20F8037E0A79715EEF29BE328"
+ "06A1D58BB7C5DA76F550AA3D8A1FBFF0EB19CCB1A313D55C"
+ "DA56C9EC2EF29632387FE8D76E3C0468043E8F663F4860EE"
+ "12BF2D5B0B7474D6E694F91E6DCC4024FFFFFFFFFFFFFFFF"
+},
+#endif
+#ifdef LTC_DH8192
+{ /* 8192-bit MODP Group 18 - https://tools.ietf.org/html/rfc3526#section-7 */
+ 1024,
+ "DH-8192",
+ "2",
+ "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
+ "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
+ "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
+ "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
+ "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
+ "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"
+ "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
+ "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B"
+ "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"
+ "DE2BCBF6955817183995497CEA956AE515D2261898FA0510"
+ "15728E5A8AAAC42DAD33170D04507A33A85521ABDF1CBA64"
+ "ECFB850458DBEF0A8AEA71575D060C7DB3970F85A6E1E4C7"
+ "ABF5AE8CDB0933D71E8C94E04A25619DCEE3D2261AD2EE6B"
+ "F12FFA06D98A0864D87602733EC86A64521F2B18177B200C"
+ "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB31"
+ "43DB5BFCE0FD108E4B82D120A92108011A723C12A787E6D7"
+ "88719A10BDBA5B2699C327186AF4E23C1A946834B6150BDA"
+ "2583E9CA2AD44CE8DBBBC2DB04DE8EF92E8EFC141FBECAA6"
+ "287C59474E6BC05D99B2964FA090C3A2233BA186515BE7ED"
+ "1F612970CEE2D7AFB81BDD762170481CD0069127D5B05AA9"
+ "93B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934028492"
+ "36C3FAB4D27C7026C1D4DCB2602646DEC9751E763DBA37BD"
+ "F8FF9406AD9E530EE5DB382F413001AEB06A53ED9027D831"
+ "179727B0865A8918DA3EDBEBCF9B14ED44CE6CBACED4BB1B"
+ "DB7F1447E6CC254B332051512BD7AF426FB8F401378CD2BF"
+ "5983CA01C64B92ECF032EA15D1721D03F482D7CE6E74FEF6"
+ "D55E702F46980C82B5A84031900B1C9E59E7C97FBEC7E8F3"
+ "23A97A7E36CC88BE0F1D45B7FF585AC54BD407B22B4154AA"
+ "CC8F6D7EBF48E1D814CC5ED20F8037E0A79715EEF29BE328"
+ "06A1D58BB7C5DA76F550AA3D8A1FBFF0EB19CCB1A313D55C"
+ "DA56C9EC2EF29632387FE8D76E3C0468043E8F663F4860EE"
+ "12BF2D5B0B7474D6E694F91E6DBE115974A3926F12FEE5E4"
+ "38777CB6A932DF8CD8BEC4D073B931BA3BC832B68D9DD300"
+ "741FA7BF8AFC47ED2576F6936BA424663AAB639C5AE4F568"
+ "3423B4742BF1C978238F16CBE39D652DE3FDB8BEFC848AD9"
+ "22222E04A4037C0713EB57A81A23F0C73473FC646CEA306B"
+ "4BCBC8862F8385DDFA9D4B7FA2C087E879683303ED5BDD3A"
+ "062B3CF5B3A278A66D2A13F83F44F82DDF310EE074AB6A36"
+ "4597E899A0255DC164F31CC50846851DF9AB48195DED7EA1"
+ "B1D510BD7EE74D73FAF36BC31ECFA268359046F4EB879F92"
+ "4009438B481C6CD7889A002ED5EE382BC9190DA6FC026E47"
+ "9558E4475677E9AA9E3050E2765694DFC81F56E880B96E71"
+ "60C980DD98EDD3DFFFFFFFFFFFFFFFFF"
+},
+#endif
+{
+ 0,
+ NULL,
+ NULL,
+ NULL
+}
+};
+
+/**
+ Returns the DH group size (octets) for given key
+ @param key The DH key to get the size of
+ @return The group size in octets (0 on error)
+ */
+int dh_get_groupsize(dh_key *key)
+{
+ if (key == NULL) return 0;
+ return mp_unsigned_bin_size(key->prime);
+}
+
+#endif /* LTC_MDH */
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */
diff --git a/libtomcrypt/src/pk/dh/dh_check_pubkey.c b/libtomcrypt/src/pk/dh/dh_check_pubkey.c
new file mode 100644
index 0000000..fb4f37b
--- /dev/null
+++ b/libtomcrypt/src/pk/dh/dh_check_pubkey.c
@@ -0,0 +1,65 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+
+#include "tomcrypt.h"
+
+#ifdef LTC_MDH
+
+/**
+ Check DH public key (INTERNAL ONLY, not part of public API)
+ @param key The key you wish to test
+ @return CRYPT_OK if successful
+*/
+int dh_check_pubkey(dh_key *key)
+{
+ void *p_minus1;
+ ltc_mp_digit digit;
+ int i, digit_count, bits_set = 0, err;
+
+ LTC_ARGCHK(key != NULL);
+
+ if ((err = mp_init(&p_minus1)) != CRYPT_OK) {
+ return err;
+ }
+
+ /* avoid: y <= 1 OR y >= p-1 */
+ if ((err = mp_sub_d(key->prime, 1, p_minus1)) != CRYPT_OK) {
+ goto error;
+ }
+ if (mp_cmp(key->y, p_minus1) != LTC_MP_LT || mp_cmp_d(key->y, 1) != LTC_MP_GT) {
+ err = CRYPT_INVALID_ARG;
+ goto error;
+ }
+
+ /* public key must have more than one bit set */
+ digit_count = mp_get_digit_count(key->y);
+ for (i = 0; i < digit_count && bits_set < 2; i++) {
+ digit = mp_get_digit(key->y, i);
+ while (digit > 0) {
+ if (digit & 1) bits_set++;
+ digit >>= 1;
+ }
+ }
+ if (bits_set > 1) {
+ err = CRYPT_OK;
+ }
+ else {
+ err = CRYPT_INVALID_ARG;
+ }
+
+error:
+ mp_clear(p_minus1);
+ return err;
+}
+
+#endif /* LTC_MDH */
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */
diff --git a/libtomcrypt/src/pk/dh/dh_export.c b/libtomcrypt/src/pk/dh/dh_export.c
new file mode 100644
index 0000000..6a02a89
--- /dev/null
+++ b/libtomcrypt/src/pk/dh/dh_export.c
@@ -0,0 +1,62 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+
+#include "tomcrypt.h"
+
+#ifdef LTC_MDH
+
+/**
+ Export a DH key to a binary packet
+ @param out [out] The destination for the key
+ @param outlen [in/out] The max size and resulting size of the DH key
+ @param type Which type of key (PK_PRIVATE or PK_PUBLIC)
+ @param key The key you wish to export
+ @return CRYPT_OK if successful
+*/
+int dh_export(unsigned char *out, unsigned long *outlen, int type, dh_key *key)
+{
+ unsigned char flags[1];
+ int err;
+ unsigned long version = 0;
+
+ LTC_ARGCHK(out != NULL);
+ LTC_ARGCHK(outlen != NULL);
+ LTC_ARGCHK(key != NULL);
+
+ if (type == PK_PRIVATE) {
+ /* export x - private key */
+ flags[0] = 1;
+ err = der_encode_sequence_multi(out, outlen,
+ LTC_ASN1_SHORT_INTEGER, 1UL, &version,
+ LTC_ASN1_BIT_STRING, 1UL, flags,
+ LTC_ASN1_INTEGER, 1UL, key->prime,
+ LTC_ASN1_INTEGER, 1UL, key->base,
+ LTC_ASN1_INTEGER, 1UL, key->x,
+ LTC_ASN1_EOL, 0UL, NULL);
+ }
+ else {
+ /* export y - public key */
+ flags[0] = 0;
+ err = der_encode_sequence_multi(out, outlen,
+ LTC_ASN1_SHORT_INTEGER, 1UL, &version,
+ LTC_ASN1_BIT_STRING, 1UL, flags,
+ LTC_ASN1_INTEGER, 1UL, key->prime,
+ LTC_ASN1_INTEGER, 1UL, key->base,
+ LTC_ASN1_INTEGER, 1UL, key->y,
+ LTC_ASN1_EOL, 0UL, NULL);
+ }
+
+ return err;
+}
+
+#endif /* LTC_MDH */
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */
diff --git a/libtomcrypt/src/pk/dh/dh_export_key.c b/libtomcrypt/src/pk/dh/dh_export_key.c
new file mode 100644
index 0000000..d48c011
--- /dev/null
+++ b/libtomcrypt/src/pk/dh/dh_export_key.c
@@ -0,0 +1,47 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+
+#include "tomcrypt.h"
+
+#ifdef LTC_MDH
+
+/**
+ Binary export a DH key to a buffer
+ @param out [out] The destination for the key
+ @param outlen [in/out] The max size and resulting size of the DH key
+ @param type Which type of key (PK_PRIVATE or PK_PUBLIC)
+ @param key The key you wish to export
+ @return CRYPT_OK if successful
+*/
+int dh_export_key(void *out, unsigned long *outlen, int type, dh_key *key)
+{
+ unsigned long len;
+ void *k;
+
+ LTC_ARGCHK(out != NULL);
+ LTC_ARGCHK(outlen != NULL);
+ LTC_ARGCHK(key != NULL);
+
+ k = (type == PK_PRIVATE) ? key->x : key->y;
+ len = mp_unsigned_bin_size(k);
+
+ if (*outlen < len) {
+ *outlen = len;
+ return CRYPT_BUFFER_OVERFLOW;
+ }
+ *outlen = len;
+
+ return mp_to_unsigned_bin(k, out);
+}
+
+#endif /* LTC_MDH */
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */
diff --git a/libtomcrypt/src/pk/dh/dh_free.c b/libtomcrypt/src/pk/dh/dh_free.c
new file mode 100644
index 0000000..b4f58ca
--- /dev/null
+++ b/libtomcrypt/src/pk/dh/dh_free.c
@@ -0,0 +1,28 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+
+#include "tomcrypt.h"
+
+#ifdef LTC_MDH
+
+/**
+ Free the allocated ram for a DH key
+ @param key The key which you wish to free
+*/
+void dh_free(dh_key *key)
+{
+ LTC_ARGCHKVD(key != NULL);
+ mp_cleanup_multi(&key->prime, &key->base, &key->y, &key->x, NULL);
+}
+
+#endif /* LTC_MDH */
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */
diff --git a/libtomcrypt/src/pk/dh/dh_generate_key.c b/libtomcrypt/src/pk/dh/dh_generate_key.c
new file mode 100644
index 0000000..69fb6f9
--- /dev/null
+++ b/libtomcrypt/src/pk/dh/dh_generate_key.c
@@ -0,0 +1,102 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+
+#include "tomcrypt.h"
+
+#ifdef LTC_MDH
+
+static int _dh_groupsize_to_keysize(int groupsize)
+{
+ /* The strength estimates from https://tools.ietf.org/html/rfc3526#section-8
+ * We use "Estimate 2" to get an appropriate private key (exponent) size.
+ */
+ if (groupsize <= 0) {
+ return 0;
+ }
+ else if (groupsize <= 192) {
+ return 30; /* 1536-bit => key size 240-bit */
+ }
+ else if (groupsize <= 256) {
+ return 40; /* 2048-bit => key size 320-bit */
+ }
+ else if (groupsize <= 384) {
+ return 52; /* 3072-bit => key size 416-bit */
+ }
+ else if (groupsize <= 512) {
+ return 60; /* 4096-bit => key size 480-bit */
+ }
+ else if (groupsize <= 768) {
+ return 67; /* 6144-bit => key size 536-bit */
+ }
+ else if (groupsize <= 1024) {
+ return 77; /* 8192-bit => key size 616-bit */
+ }
+ else {
+ return 0;
+ }
+}
+
+int dh_generate_key(prng_state *prng, int wprng, dh_key *key)
+{
+ unsigned char *buf;
+ unsigned long keysize;
+ int err, max_iterations = LTC_PK_MAX_RETRIES;
+
+ LTC_ARGCHK(key != NULL);
+ LTC_ARGCHK(ltc_mp.name != NULL);
+
+ /* good prng? */
+ if ((err = prng_is_valid(wprng)) != CRYPT_OK) {
+ return err;
+ }
+
+ keysize = _dh_groupsize_to_keysize(mp_unsigned_bin_size(key->prime));
+ if (keysize == 0) {
+ err = CRYPT_INVALID_KEYSIZE;
+ goto freemp;
+ }
+
+ /* allocate buffer */
+ buf = XMALLOC(keysize);
+ if (buf == NULL) {
+ err = CRYPT_MEM;
+ goto freemp;
+ }
+
+ key->type = PK_PRIVATE;
+ do {
+ /* make up random buf */
+ if (prng_descriptor[wprng].read(buf, keysize, prng) != keysize) {
+ err = CRYPT_ERROR_READPRNG;
+ goto freebuf;
+ }
+ /* load the x value - private key */
+ if ((err = mp_read_unsigned_bin(key->x, buf, keysize)) != CRYPT_OK) {
+ goto freebuf;
+ }
+ /* compute the y value - public key */
+ if ((err = mp_exptmod(key->base, key->x, key->prime, key->y)) != CRYPT_OK) {
+ goto freebuf;
+ }
+ err = dh_check_pubkey(key);
+ } while (err != CRYPT_OK && max_iterations-- > 0);
+
+freebuf:
+ zeromem(buf, keysize);
+ XFREE(buf);
+freemp:
+ if (err != CRYPT_OK) dh_free(key);
+ return err;
+}
+
+#endif /* LTC_MDH */
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */
diff --git a/libtomcrypt/src/pk/dh/dh_import.c b/libtomcrypt/src/pk/dh/dh_import.c
new file mode 100644
index 0000000..601e5e7
--- /dev/null
+++ b/libtomcrypt/src/pk/dh/dh_import.c
@@ -0,0 +1,99 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+
+#include "tomcrypt.h"
+
+#ifdef LTC_MDH
+
+/**
+ Import a DH key from a binary packet
+ @param in The packet to read
+ @param inlen The length of the input packet
+ @param key [out] Where to import the key to
+ @return CRYPT_OK if successful, on error all allocated memory is freed automatically
+*/
+int dh_import(const unsigned char *in, unsigned long inlen, dh_key *key)
+{
+ unsigned char flags[1];
+ int err;
+ unsigned long version;
+
+ LTC_ARGCHK(in != NULL);
+ LTC_ARGCHK(key != NULL);
+
+ /* init */
+ if ((err = mp_init_multi(&key->x, &key->y, &key->base, &key->prime, NULL)) != CRYPT_OK) {
+ return err;
+ }
+
+ /* find out what type of key it is */
+ err = der_decode_sequence_multi(in, inlen,
+ LTC_ASN1_SHORT_INTEGER, 1UL, &version,
+ LTC_ASN1_BIT_STRING, 1UL, &flags,
+ LTC_ASN1_EOL, 0UL, NULL);
+ if (err != CRYPT_OK && err != CRYPT_INPUT_TOO_LONG) {
+ goto error;
+ }
+
+ if (version == 0) {
+ if (flags[0] == 1) {
+ key->type = PK_PRIVATE;
+ if ((err = der_decode_sequence_multi(in, inlen,
+ LTC_ASN1_SHORT_INTEGER, 1UL, &version,
+ LTC_ASN1_BIT_STRING, 1UL, flags,
+ LTC_ASN1_INTEGER, 1UL, key->prime,
+ LTC_ASN1_INTEGER, 1UL, key->base,
+ LTC_ASN1_INTEGER, 1UL, key->x,
+ LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) {
+ goto error;
+ }
+ /* compute public key: y = (base ^ x) mod prime */
+ if ((err = mp_exptmod(key->base, key->x, key->prime, key->y)) != CRYPT_OK) {
+ goto error;
+ }
+ }
+ else if (flags[0] == 0) {
+ key->type = PK_PUBLIC;
+ if ((err = der_decode_sequence_multi(in, inlen,
+ LTC_ASN1_SHORT_INTEGER, 1UL, &version,
+ LTC_ASN1_BIT_STRING, 1UL, flags,
+ LTC_ASN1_INTEGER, 1UL, key->prime,
+ LTC_ASN1_INTEGER, 1UL, key->base,
+ LTC_ASN1_INTEGER, 1UL, key->y,
+ LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) {
+ goto error;
+ }
+ }
+ else {
+ err = CRYPT_INVALID_PACKET;
+ goto error;
+ }
+ }
+ else {
+ err = CRYPT_INVALID_PACKET;
+ goto error;
+ }
+
+ /* check public key */
+ if ((err = dh_check_pubkey(key)) != CRYPT_OK) {
+ goto error;
+ }
+
+ return CRYPT_OK;
+
+error:
+ dh_free(key);
+ return err;
+}
+
+#endif /* LTC_MDH */
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */
diff --git a/libtomcrypt/src/pk/dh/dh_set.c b/libtomcrypt/src/pk/dh/dh_set.c
new file mode 100644
index 0000000..8d0af7d
--- /dev/null
+++ b/libtomcrypt/src/pk/dh/dh_set.c
@@ -0,0 +1,124 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+
+#include "tomcrypt.h"
+
+#ifdef LTC_MDH
+
+/**
+ Import DH key parts p and g from raw numbers
+
+ @param p DH's p (prime)
+ @param plen DH's p's length
+ @param g DH's g (group)
+ @param glen DH's g's length
+ @param key [out] the destination for the imported key
+ @return CRYPT_OK if successful
+*/
+int dh_set_pg(const unsigned char *p, unsigned long plen,
+ const unsigned char *g, unsigned long glen,
+ dh_key *key)
+{
+ int err;
+
+ LTC_ARGCHK(key != NULL);
+ LTC_ARGCHK(p != NULL);
+ LTC_ARGCHK(g != NULL);
+ LTC_ARGCHK(ltc_mp.name != NULL);
+
+ if ((err = mp_init_multi(&key->x, &key->y, &key->base, &key->prime, NULL)) != CRYPT_OK) {
+ return err;
+ }
+
+ if ((err = mp_read_unsigned_bin(key->base, (unsigned char*)g, glen)) != CRYPT_OK) { goto LBL_ERR; }
+ if ((err = mp_read_unsigned_bin(key->prime, (unsigned char*)p, plen)) != CRYPT_OK) { goto LBL_ERR; }
+
+ return CRYPT_OK;
+
+LBL_ERR:
+ dh_free(key);
+ return err;
+}
+
+/**
+ Import DH key parts p and g from built-in DH groups
+
+ @param groupsize The size of the DH group to use
+ @param key [out] Where the newly created DH key will be stored
+ @return CRYPT_OK if successful, note: on error all allocated memory will be freed automatically.
+*/
+int dh_set_pg_groupsize(int groupsize, dh_key *key)
+{
+ int err, i;
+
+ LTC_ARGCHK(key != NULL);
+ LTC_ARGCHK(ltc_mp.name != NULL);
+ LTC_ARGCHK(groupsize > 0);
+
+ for (i = 0; (groupsize > ltc_dh_sets[i].size) && (ltc_dh_sets[i].size != 0); i++);
+ if (ltc_dh_sets[i].size == 0) return CRYPT_INVALID_KEYSIZE;
+
+ if ((err = mp_init_multi(&key->x, &key->y, &key->base, &key->prime, NULL)) != CRYPT_OK) {
+ return err;
+ }
+ if ((err = mp_read_radix(key->base, ltc_dh_sets[i].base, 16)) != CRYPT_OK) { goto LBL_ERR; }
+ if ((err = mp_read_radix(key->prime, ltc_dh_sets[i].prime, 16)) != CRYPT_OK) { goto LBL_ERR; }
+
+ return CRYPT_OK;
+
+LBL_ERR:
+ dh_free(key);
+ return err;
+}
+
+/**
+ Import DH public or private key part from raw numbers
+
+ NB: The p & g parts must be set beforehand
+
+ @param in The key-part to import, either public or private.
+ @param inlen The key-part's length
+ @param type Which type of key (PK_PRIVATE or PK_PUBLIC)
+ @param key [out] the destination for the imported key
+ @return CRYPT_OK if successful
+*/
+int dh_set_key(const unsigned char *in, unsigned long inlen, int type, dh_key *key)
+{
+ int err;
+
+ LTC_ARGCHK(key != NULL);
+ LTC_ARGCHK(ltc_mp.name != NULL);
+
+ if (type == PK_PRIVATE) {
+ key->type = PK_PRIVATE;
+ if ((err = mp_read_unsigned_bin(key->x, (unsigned char*)in, inlen)) != CRYPT_OK) { goto LBL_ERR; }
+ if ((err = mp_exptmod(key->base, key->x, key->prime, key->y)) != CRYPT_OK) { goto LBL_ERR; }
+ }
+ else {
+ key->type = PK_PUBLIC;
+ if ((err = mp_read_unsigned_bin(key->y, (unsigned char*)in, inlen)) != CRYPT_OK) { goto LBL_ERR; }
+ }
+
+ /* check public key */
+ if ((err = dh_check_pubkey(key)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+
+ return CRYPT_OK;
+
+LBL_ERR:
+ dh_free(key);
+ return err;
+}
+
+#endif /* LTC_MDH */
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */
diff --git a/libtomcrypt/src/pk/dh/dh_set_pg_dhparam.c b/libtomcrypt/src/pk/dh/dh_set_pg_dhparam.c
new file mode 100644
index 0000000..7003011
--- /dev/null
+++ b/libtomcrypt/src/pk/dh/dh_set_pg_dhparam.c
@@ -0,0 +1,54 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+
+#include "tomcrypt.h"
+
+#ifdef LTC_MDH
+
+/**
+ Import DH key parts p and g from dhparam
+
+ dhparam data: openssl dhparam -outform DER -out dhparam.der 2048
+
+ @param dhparam The DH param DER encoded data
+ @param dhparamlen The length of dhparam data
+ @param key [out] Where the newly created DH key will be stored
+ @return CRYPT_OK if successful, note: on error all allocated memory will be freed automatically.
+*/
+int dh_set_pg_dhparam(const unsigned char *dhparam, unsigned long dhparamlen, dh_key *key)
+{
+ int err;
+
+ LTC_ARGCHK(key != NULL);
+ LTC_ARGCHK(ltc_mp.name != NULL);
+ LTC_ARGCHK(dhparam != NULL);
+ LTC_ARGCHK(dhparamlen > 0);
+
+ if ((err = mp_init_multi(&key->x, &key->y, &key->base, &key->prime, NULL)) != CRYPT_OK) {
+ return err;
+ }
+ if ((err = der_decode_sequence_multi(dhparam, dhparamlen,
+ LTC_ASN1_INTEGER, 1UL, key->prime,
+ LTC_ASN1_INTEGER, 1UL, key->base,
+ LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+
+ return CRYPT_OK;
+
+LBL_ERR:
+ dh_free(key);
+ return err;
+}
+
+#endif /* LTC_MDH */
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */
diff --git a/libtomcrypt/src/pk/dh/dh_shared_secret.c b/libtomcrypt/src/pk/dh/dh_shared_secret.c
new file mode 100644
index 0000000..1eb69fb
--- /dev/null
+++ b/libtomcrypt/src/pk/dh/dh_shared_secret.c
@@ -0,0 +1,80 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+
+#include "tomcrypt.h"
+
+#ifdef LTC_MDH
+
+/**
+ Create a DH shared secret.
+ @param private_key The private DH key in the pair
+ @param public_key The public DH key in the pair
+ @param out [out] The destination of the shared data
+ @param outlen [in/out] The max size and resulting size of the shared data.
+ @return CRYPT_OK if successful
+*/
+int dh_shared_secret(dh_key *private_key, dh_key *public_key,
+ unsigned char *out, unsigned long *outlen)
+{
+ void *tmp;
+ unsigned long x;
+ int err;
+
+ LTC_ARGCHK(private_key != NULL);
+ LTC_ARGCHK(public_key != NULL);
+ LTC_ARGCHK(out != NULL);
+ LTC_ARGCHK(outlen != NULL);
+
+ /* types valid? */
+ if (private_key->type != PK_PRIVATE) {
+ return CRYPT_PK_NOT_PRIVATE;
+ }
+
+ /* same DH group? */
+ if (mp_cmp(private_key->prime, public_key->prime) != LTC_MP_EQ) { return CRYPT_PK_TYPE_MISMATCH; }
+ if (mp_cmp(private_key->base, public_key->base) != LTC_MP_EQ) { return CRYPT_PK_TYPE_MISMATCH; }
+
+ /* init big numbers */
+ if ((err = mp_init(&tmp)) != CRYPT_OK) {
+ return err;
+ }
+
+ /* check public key */
+ if ((err = dh_check_pubkey(public_key)) != CRYPT_OK) {
+ goto error;
+ }
+
+ /* compute tmp = y^x mod p */
+ if ((err = mp_exptmod(public_key->y, private_key->x, private_key->prime, tmp)) != CRYPT_OK) {
+ goto error;
+ }
+
+ /* enough space for output? */
+ x = (unsigned long)mp_unsigned_bin_size(tmp);
+ if (*outlen < x) {
+ *outlen = x;
+ err = CRYPT_BUFFER_OVERFLOW;
+ goto error;
+ }
+ if ((err = mp_to_unsigned_bin(tmp, out)) != CRYPT_OK) {
+ goto error;
+ }
+ *outlen = x;
+ err = CRYPT_OK;
+
+error:
+ mp_clear(tmp);
+ return err;
+}
+
+#endif /* LTC_MDH */
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 10:31:41 +0000