dearsky/pico-hsm
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Some optimizations.

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Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2022-10-31 00:38:30 +01:00
parent ab61b2a2d5
commit cfc0cc8f6e
1 changed files with 3 additions and 8 deletions
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11
src/hsm/cmd_derive_asym.c
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@@ -19,7 +19,7 @@
#include "mbedtls/ecdsa.h" #include "mbedtls/ecdsa.h"
#include "crypto_utils.h" #include "crypto_utils.h"
#include "sc_hsm.h" #include "sc_hsm.h"
#include "cvc.h"
#define MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED -0x006E #define MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED -0x006E
#define MOD_ADD( N ) \ #define MOD_ADD( N ) \
@@ -72,29 +72,24 @@ int cmd_derive_asym() {
return SW_DATA_INVALID(); return SW_DATA_INVALID();
} }
r = mbedtls_mpi_add_mod(&ctx.grp, &nd, &ctx.d, &a); r = mbedtls_mpi_add_mod(&ctx.grp, &nd, &ctx.d, &a);
mbedtls_mpi_free(&a);
if (r != 0) { if (r != 0) {
mbedtls_ecdsa_free(&ctx); mbedtls_ecdsa_free(&ctx);
mbedtls_mpi_free(&a);
mbedtls_mpi_free(&nd); mbedtls_mpi_free(&nd);
return SW_EXEC_ERROR(); return SW_EXEC_ERROR();
} }
r = mbedtls_mpi_copy(&ctx.d, &nd); r = mbedtls_mpi_copy(&ctx.d, &nd);
mbedtls_mpi_free(&nd);
if (r != 0) { if (r != 0) {
mbedtls_ecdsa_free(&ctx); mbedtls_ecdsa_free(&ctx);
mbedtls_mpi_free(&a);
mbedtls_mpi_free(&nd);
return SW_EXEC_ERROR(); return SW_EXEC_ERROR();
} }
r = store_keys(&ctx, HSM_KEY_EC, dest_id); r = store_keys(&ctx, HSM_KEY_EC, dest_id);
if (r != CCID_OK) { if (r != CCID_OK) {
mbedtls_ecdsa_free(&ctx); mbedtls_ecdsa_free(&ctx);
mbedtls_mpi_free(&a);
mbedtls_mpi_free(&nd);
return SW_EXEC_ERROR(); return SW_EXEC_ERROR();
} }
mbedtls_ecdsa_free(&ctx); mbedtls_ecdsa_free(&ctx);
mbedtls_mpi_free(&a);
mbedtls_mpi_free(&nd);
} }
else else
return SW_WRONG_DATA(); return SW_WRONG_DATA();