mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-10-11 10:29:01 +00:00
53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
#include <string.h>
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#include "sha2.h"
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#include "ed25519-donna/ed25519.h"
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#include "crypto.h"
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/*
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void hash_flash(uint8_t hash[SHA256_DIGEST_LENGTH])
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{
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sha256_Raw((const uint8_t *)FLASH_BASE, 1024*1024, hash);
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}
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bool ed25519_verify(const uint8_t *msg, uint32_t msglen, uint8_t *pubkey, uint8_t *signature)
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{
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return (0 == ed25519_sign_open(msg, msglen, *(const ed25519_public_key *)pubkey, *(const ed25519_signature *)signature));
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}
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*/
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bool check_header(const uint8_t *data)
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{
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uint32_t magic;
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memcpy(&magic, data, 4);
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if (magic != 0x425A5254) return false; // TRZB
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uint32_t hdrlen;
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memcpy(&hdrlen, data + 4, 4);
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if (hdrlen != 256) return false;
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uint32_t expiry;
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memcpy(&expiry, data + 8, 4);
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if (expiry != 0) return false;
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uint32_t codelen;
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memcpy(&codelen, data + 12, 4);
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if (codelen != 64 * 1024) return false;
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uint32_t version;
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memcpy(&version, data + 16, 4);
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// uint8_t reserved[171];
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uint8_t sigidx;
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memcpy(&sigidx, data + 0x00BF, 1);
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uint8_t sig[64];
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memcpy(sig, data + 0x00C0, 64);
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// TODO: check signature
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return true;
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}
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