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hf 14a info - add MFC EV1 signature checks

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This commit is contained in:
iceman1001
2021-02-19 13:39:35 +01:00
parent 848722f851
commit 9293a25e3e
7 changed files with 126 additions and 58 deletions
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7
client/src/crypto/libpcrypto.c
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@@ -384,9 +384,8 @@ int ecdsa_signature_verify(mbedtls_ecp_group_id curveid, uint8_t *key_xy, uint8_
// take signature bytes, converts to ASN1 signature and tries to verify
int ecdsa_signature_r_s_verify(mbedtls_ecp_group_id curveid, uint8_t *key_xy, uint8_t *input, int length, uint8_t *r_s, size_t r_s_len, bool hash) {
int res;
uint8_t signature[MBEDTLS_ECDSA_MAX_LEN];
size_t signature_len;
uint8_t signature[MBEDTLS_ECDSA_MAX_LEN] = {0};
size_t signature_len = 0;
// convert r & s to ASN.1 signature
mbedtls_mpi r, s;
@@ -395,7 +394,7 @@ int ecdsa_signature_r_s_verify(mbedtls_ecp_group_id curveid, uint8_t *key_xy, ui
mbedtls_mpi_read_binary(&r, r_s, r_s_len / 2);
mbedtls_mpi_read_binary(&s, r_s + r_s_len / 2, r_s_len / 2);
res = ecdsa_signature_to_asn1(&r, &s, signature, &signature_len);
int res = ecdsa_signature_to_asn1(&r, &s, signature, &signature_len);
if (res < 0) {
return res;
}