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| author | Dennis Brentjes <d.brentjes@gmail.com> | 2017-12-23 17:49:59 +0100 |
|---|---|---|
| committer | Dennis Brentjes <d.brentjes@gmail.com> | 2017-12-23 17:49:59 +0100 |
| commit | 126021b3766e6fb33333b7939d78dadd1c632eb4 (patch) | |
| tree | 56ed7de471d2ad9cd85403cffc309379f922dc3f /libcmix-crypto | |
| parent | e1e1e9ac34ab70c3a1f2344361c7e04e5f15c3bd (diff) | |
| download | cmix-126021b3766e6fb33333b7939d78dadd1c632eb4.tar.gz cmix-126021b3766e6fb33333b7939d78dadd1c632eb4.tar.bz2 cmix-126021b3766e6fb33333b7939d78dadd1c632eb4.zip | |
Preparing multiple mixes
Diffstat (limited to 'libcmix-crypto')
| -rw-r--r-- | libcmix-crypto/ed25519/gcrypt/gcrypt_ed25519.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/libcmix-crypto/ed25519/gcrypt/gcrypt_ed25519.c b/libcmix-crypto/ed25519/gcrypt/gcrypt_ed25519.c index bcaca51..afee9b1 100644 --- a/libcmix-crypto/ed25519/gcrypt/gcrypt_ed25519.c +++ b/libcmix-crypto/ed25519/gcrypt/gcrypt_ed25519.c @@ -322,11 +322,9 @@ GroupElement DEF(get_group_element)(bool secure) { check(error); } while(gcry_mpi_cmp_ui(a, 0) == 0 || gcry_mpi_cmp(a, p) != -1); - char* encoded_point = (char*) calloc(nr_bytes+1, sizeof(char)); - TRACE(__FILE__, __LINE__, encoded_point) - free(encoded_point); encoded_point = (char*) calloc(nr_bytes+1, sizeof(char)); + TRACE(__FILE__, __LINE__, encoded_point) encoded_point[0] = 0x40; unsigned int byte_size = (unsigned) ceil(gcry_mpi_get_nbits(a) / 8.0); @@ -456,10 +454,14 @@ GroupElement DEF(derive_shared_key)(struct KeyPair keypair, unsigned char const* (void)swap; GroupElement ga = DEF(array_to_element)((const char*) value, value_len, false); - + gcry_mpi_point_t gab = gcry_mpi_point_new(nr_point_bits); - gcry_mpi_ec_mul(gab, (gcry_mpi_t) priv_value, (gcry_mpi_point_t) ga, ctx); + + gcry_mpi_t x = gcry_mpi_new(0); + gcry_mpi_ec_get_affine(x, NULL, (gcry_mpi_point_t) priv_value, ctx); + gcry_mpi_ec_mul(gab, x, (gcry_mpi_point_t) ga, ctx); + gcry_mpi_release(x); gcry_mpi_point_release((gcry_mpi_point_t) ga); TRACE(__FILE__, __LINE__, gab); |