39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
/*******************************************************************************
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* Ledger Blue - Bitcoin Wallet
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* (c) 2016 Ledger
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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 "btchip_internal.h"
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#include "btchip_apdu_constants.h"
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#define MAX_LENGTH 248
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unsigned short btchip_apdu_get_random() {
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unsigned char length = G_io_apdu_buffer[ISO_OFFSET_LC];
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if (length == 0) {
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length = MAX_LENGTH;
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}
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if (length > MAX_LENGTH) {
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return BTCHIP_SW_INCORRECT_LENGTH;
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}
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cx_rng(G_io_apdu_buffer, length);
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btchip_context_D.outLength = length;
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return BTCHIP_SW_OK;
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}
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