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https://github.com/trezor/trezor-firmware.git
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small cosmetic changes
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parent
9308fddb7f
commit
a439d8674d
9
ecdsa.c
9
ecdsa.c
@ -379,8 +379,7 @@ int ecdsa_verify(const uint8_t *pub_key, const uint8_t *sig, const uint8_t *msg,
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bn_read_be(hash, &z);
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if (bn_is_zero(&r) ||
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bn_is_zero(&s) ||
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if (bn_is_zero(&r) || bn_is_zero(&s) ||
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(!bn_is_less(&r, &order256k1)) ||
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(!bn_is_less(&s, &order256k1))) return 2;
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@ -410,10 +409,14 @@ int ecdsa_verify(const uint8_t *pub_key, const uint8_t *sig, const uint8_t *msg,
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bn_mod(&(res.x), &prime256k1);
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bn_mod(&(res.x), &order256k1);
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// signature does not match
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for (i = 0; i < 9; i++) {
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if (res.x.val[i] != r.val[i]) {
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return 3;
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return 4;
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}
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}
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// all OK
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return 0;
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}
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