76 lines
2.6 KiB
C
76 lines
2.6 KiB
C
/*******************************************************************************
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* Ledger Ethereum App
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* (c) 2016-2019 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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#ifndef _ETHUTILS_H_
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#define _ETHUTILS_H_
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#include <stdint.h>
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#include "cx.h"
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#include "chainConfig.h"
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/**
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* @brief Decode an RLP encoded field - see
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* https://github.com/ethereum/wiki/wiki/RLP
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* @param [in] buffer buffer containing the RLP encoded field to decode
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* @param [in] bufferLength size of the buffer
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* @param [out] fieldLength length of the RLP encoded field
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* @param [out] offset offset to the beginning of the RLP encoded field from the
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* buffer
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* @param [out] list true if the field encodes a list, false if it encodes a
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* string
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* @return true if the RLP header is consistent
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*/
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bool rlpDecodeLength(uint8_t *buffer, uint32_t bufferLength,
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uint32_t *fieldLength, uint32_t *offset, bool *list);
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bool rlpCanDecode(uint8_t *buffer, uint32_t bufferLength, bool *valid);
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void getEthAddressFromKey(cx_ecfp_public_key_t *publicKey, uint8_t *out,
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cx_sha3_t *sha3Context);
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void getEthAddressStringFromKey(cx_ecfp_public_key_t *publicKey, uint8_t *out,
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cx_sha3_t *sha3Context,
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chain_config_t* chain_config);
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void getEthAddressStringFromBinary(uint8_t *address, uint8_t *out,
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cx_sha3_t *sha3Context,
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chain_config_t* chain_config);
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bool adjustDecimals(char *src, uint32_t srcLength, char *target,
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uint32_t targetLength, uint8_t decimals);
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__attribute__((no_instrument_function))
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inline int allzeroes(uint8_t *buf, int n) {
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for (int i = 0; i < n; ++i) {
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if (buf[i]) {
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return 0;
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}
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}
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return 1;
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}
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__attribute__((no_instrument_function))
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inline int ismaxint(uint8_t *buf, int n) {
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for (int i = 0; i < n; ++i) {
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if (buf[i] != 0xff) {
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return 0;
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}
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}
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return 1;
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}
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#endif /* _ETHUTILS_H_ */
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