40 lines
1.4 KiB
C
40 lines
1.4 KiB
C
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/* Copyright 2017 Cedric Mesnil <cslashm@gmail.com>, Ledger SAS
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "os.h"
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#include "cx.h"
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#include "gpg_types.h"
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#include "gpg_api.h"
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#include "gpg_vars.h"
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int gpg_apdu_get_challenge() {
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if (G_gpg_vstate.io_le > GPG_EXT_CHALLENGE_LENTH) {
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THROW(SW_WRONG_LENGTH);
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}
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gpg_io_discard(1);
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cx_rng(G_gpg_vstate.work.io_buffer+G_gpg_vstate.io_offset, G_gpg_vstate.io_le);
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cx_rng(G_gpg_vstate.work.io_buffer+G_gpg_vstate.io_offset, G_gpg_vstate.io_le);
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cx_rng(G_gpg_vstate.work.io_buffer+G_gpg_vstate.io_offset, G_gpg_vstate.io_le);
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cx_rng(G_gpg_vstate.work.io_buffer+G_gpg_vstate.io_offset, G_gpg_vstate.io_le);
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cx_rng(G_gpg_vstate.work.io_buffer+G_gpg_vstate.io_offset, G_gpg_vstate.io_le);
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if (G_gpg_vstate.io_p1 & 0x80) {
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cx_math_next_prime(G_gpg_vstate.work.io_buffer+G_gpg_vstate.io_offset,G_gpg_vstate.io_le);
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}
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gpg_io_inserted(G_gpg_vstate.io_le);
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return SW_OK;
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}
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