diff options
Diffstat (limited to 'cipher')
| -rw-r--r-- | cipher/ecc-misc.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/cipher/ecc-misc.c b/cipher/ecc-misc.c index 33af6f74..e0dfec3c 100644 --- a/cipher/ecc-misc.c +++ b/cipher/ecc-misc.c @@ -342,10 +342,8 @@ _gcry_ecc_mont_decodepoint (gcry_mpi_t pk, mpi_ec_t ctx, mpi_point_t result) * Only when it's the prefix, we remove it. */ if (rawmpilen > nbytes) - {/* Prefix 0x40 or 0x00 */ - rawmpi++; - rawmpilen = nbytes; - } + /* Prefix 0x40 or 0x00, which comes at the end (reverse) */ + rawmpilen = nbytes; else if (rawmpilen < nbytes) {/* * It is possible for data created by older implementation @@ -364,6 +362,7 @@ _gcry_ecc_mont_decodepoint (gcry_mpi_t pk, mpi_ec_t ctx, mpi_point_t result) } } + rawmpi[0] &= (1 << (ctx->nbits % 8)) - 1; _gcry_mpi_set_buffer (result->x, rawmpi, rawmpilen, 0); xfree (a); mpi_set_ui (result->z, 1); |