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Fix bug in ecdh_calc_secret()

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Only affects curves with nbits != pbits (currently only secp224k1)
This commit is contained in:
Manuel Pégourié-Gonnard 2014-01-17 21:24:04 +01:00
parent 5304812b2d
commit 0a56c2c698
1 changed files with 1 additions and 1 deletions
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2
library/ecdh.c
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@ -246,7 +246,7 @@ int ecdh_calc_secret( ecdh_context *ctx, size_t *olen,
if( mpi_size( &ctx->z ) > blen ) if( mpi_size( &ctx->z ) > blen )
return( POLARSSL_ERR_ECP_BAD_INPUT_DATA ); return( POLARSSL_ERR_ECP_BAD_INPUT_DATA );
*olen = ctx->grp.nbits / 8 + ( ( ctx->grp.nbits % 8 ) != 0 ); *olen = ctx->grp.pbits / 8 + ( ( ctx->grp.pbits % 8 ) != 0 );
return mpi_write_binary( &ctx->z, buf, *olen ); return mpi_write_binary( &ctx->z, buf, *olen );
} }