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Added ECDSA signature.

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Added RSA cleanups.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2022-03-01 01:15:55 +01:00
parent 486c4eb449
commit 9202c4db66
1 changed files with 53 additions and 8 deletions
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61
sc_hsm.c
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@@ -1168,7 +1168,7 @@ static int cmd_signature() {
uint8_t p2 = P2(apdu);
mbedtls_md_type_t md = MBEDTLS_MD_NONE;
file_t *fkey;
int key_size = file_read(fkey->data);
int key_size = file_read_uint16(fkey->data);
if (!(fkey = search_dynamic_file((KEY_PREFIX << 8) | key_id)))
return SW_FILE_NOT_FOUND();
if (p2 == ALGO_RSA_PKCS1_SHA1 || ALGO_RSA_PSS_SHA1 || ALGO_EC_SHA1)
@@ -1179,6 +1179,7 @@ static int cmd_signature() {
md = MBEDTLS_MD_SHA224;
if (p2 == ALGO_RSA_RAW || p2 == ALGO_RSA_PKCS1 || p2 == ALGO_RSA_PKCS1_SHA1 || p2 == ALGO_RSA_PKCS1_SHA256 || p2 == ALGO_RSA_PSS || p2 == ALGO_RSA_PSS_SHA1 || p2 == ALGO_RSA_PSS_SHA256) {
mbedtls_rsa_context ctx;
mbedtls_rsa_init(&ctx);
if (p2 == ALGO_RSA_PSS || p2 == ALGO_RSA_PSS_SHA1 || p2 == ALGO_RSA_PSS_SHA256) {
mbedtls_rsa_set_padding(&ctx, MBEDTLS_RSA_PKCS_V21, md);
}
@@ -1197,24 +1198,68 @@ static int cmd_signature() {
else if (algo == SC_ALGORITHM_RSA_HASH_SHA512)
md = MBEDTLS_MD_SHA512;
}
if (mbedtls_mpi_read_binary(&ctx.P, fkey->data+2, key_size/2) != 0)
if (mbedtls_mpi_read_binary(&ctx.P, fkey->data+2, key_size/2) != 0) {
mbedtls_rsa_free(&ctx);
return SW_DATA_INVALID();
if (mbedtls_mpi_read_binary(&ctx.Q, fkey->data+2+key_size/2, key_size/2) != 0)
}
if (mbedtls_mpi_read_binary(&ctx.Q, fkey->data+2+key_size/2, key_size/2) != 0) {
mbedtls_rsa_free(&ctx);
return SW_DATA_INVALID();
if (mbedtls_mpi_lset(&ctx.E, 0x10001) != 0)
}
if (mbedtls_mpi_lset(&ctx.E, 0x10001) != 0) {
mbedtls_rsa_free(&ctx);
return SW_EXEC_ERROR();
if (mbedtls_rsa_import(&ctx, NULL, &ctx.P, &ctx.Q, NULL, &ctx.E) != 0)
}
if (mbedtls_rsa_import(&ctx, NULL, &ctx.P, &ctx.Q, NULL, &ctx.E) != 0) {
mbedtls_rsa_free(&ctx);
return SW_DATA_INVALID();
if (mbedtls_rsa_complete(&ctx) != 0)
}
if (mbedtls_rsa_complete(&ctx) != 0) {
mbedtls_rsa_free(&ctx);
return SW_DATA_INVALID();
if (mbedtls_rsa_check_privkey(&ctx) != 0)
}
if (mbedtls_rsa_check_privkey(&ctx) != 0) {
mbedtls_rsa_free(&ctx);
return SW_DATA_INVALID();
if (mbedtls_rsa_pkcs1_sign(&ctx, random_gen, NULL, md, apdu.cmd_apdu_data_len, apdu.cmd_apdu_data, res_APDU) != 0)
}
if (mbedtls_rsa_pkcs1_sign(&ctx, random_gen, NULL, md, apdu.cmd_apdu_data_len, apdu.cmd_apdu_data, res_APDU) != 0) {
mbedtls_rsa_free(&ctx);
return SW_EXEC_ERROR();
}
res_APDU_size = key_size;
apdu.expected_res_size = key_size;
mbedtls_rsa_free(&ctx);
}
else if (p2 == ALGO_EC_RAW || p2 == ALGO_EC_SHA1 || p2 == ALGO_EC_SHA224 || p2 == ALGO_EC_SHA256) {
mbedtls_ecdsa_context ctx;
mbedtls_ecdsa_init(&ctx);
mbedtls_ecp_group_id gid = file_read_uint8(fkey->data+2);
if (p2 == ALGO_EC_RAW) {
if (apdu.cmd_apdu_data_len == 32)
md = MBEDTLS_MD_SHA256;
else if (apdu.cmd_apdu_data_len == 20)
md = MBEDTLS_MD_SHA1;
else if (apdu.cmd_apdu_data_len == 28)
md = MBEDTLS_MD_SHA224;
else if (apdu.cmd_apdu_data_len == 48)
md = MBEDTLS_MD_SHA384;
else if (apdu.cmd_apdu_data_len == 64)
md = MBEDTLS_MD_SHA512;
}
if (mbedtls_ecp_group_load(&ctx.grp, gid) != 0) {
mbedtls_ecdsa_free(&ctx);
return SW_DATA_INVALID();
}
if (mbedtls_mpi_read_binary(&ctx.d, fkey->data+3, key_size-1) != 0) {
mbedtls_ecdsa_free(&ctx);
return SW_DATA_INVALID();
}
if (mbedtls_ecdsa_write_signature(&ctx, md, apdu.cmd_apdu_data, apdu.cmd_apdu_data_len, res_APDU, MBEDTLS_ECDSA_MAX_LEN, (size_t *)&res_APDU_size, random_gen, NULL) != 0) {
mbedtls_ecdsa_free(&ctx);
return SW_EXEC_ERROR();
}
apdu.expected_res_size = res_APDU_size;
mbedtls_ecdsa_free(&ctx);
}
}