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Remove unrequired mpis from sign operation struct

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These are only used at the output stage.

Signed-off-by: Paul Elliott <paul.elliott@arm.com>
This commit is contained in:
Paul Elliott
2023-02-03 14:59:11 +00:00
parent a3a8abadff
commit 4684525ae9
2 changed files with 12 additions and 17 deletions
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23
library/psa_crypto.c
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@@ -3511,9 +3511,6 @@ psa_status_t mbedtls_psa_sign_hash_start(
mbedtls_ecdsa_restart_init(&operation->restart_ctx);
mbedtls_mpi_init(&operation->r);
mbedtls_mpi_init(&operation->s);
operation->curve_bytes = PSA_BITS_TO_BYTES(
operation->ctx->grp.pbits);
@@ -3547,6 +3544,8 @@ psa_status_t mbedtls_psa_sign_hash_complete(
size_t *signature_length)
{
psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
mbedtls_mpi r;
mbedtls_mpi s;
#if (defined(MBEDTLS_PSA_BUILTIN_ALG_ECDSA) || \
defined(MBEDTLS_PSA_BUILTIN_ALG_DETERMINISTIC_ECDSA)) && \
@@ -3556,13 +3555,16 @@ psa_status_t mbedtls_psa_sign_hash_complete(
return PSA_ERROR_BUFFER_TOO_SMALL;
}
mbedtls_mpi_init(&r);
mbedtls_mpi_init(&s);
if (PSA_ALG_ECDSA_IS_DETERMINISTIC(operation->alg)) {
#if defined(MBEDTLS_PSA_BUILTIN_ALG_DETERMINISTIC_ECDSA)
status = mbedtls_to_psa_error(
mbedtls_ecdsa_sign_det_restartable(&operation->ctx->grp,
&operation->r,
&operation->s,
&r,
&s,
&operation->ctx->d,
operation->hash,
operation->hash_length,
@@ -3577,8 +3579,8 @@ psa_status_t mbedtls_psa_sign_hash_complete(
status = mbedtls_to_psa_error(
mbedtls_ecdsa_sign_restartable(&operation->ctx->grp,
&operation->r,
&operation->s,
&r,
&s,
&operation->ctx->d,
operation->hash,
operation->hash_length,
@@ -3593,7 +3595,7 @@ psa_status_t mbedtls_psa_sign_hash_complete(
return status;
} else {
status = mbedtls_to_psa_error(
mbedtls_mpi_write_binary(&operation->r,
mbedtls_mpi_write_binary(&r,
signature,
operation->curve_bytes));
@@ -3602,7 +3604,7 @@ psa_status_t mbedtls_psa_sign_hash_complete(
}
status = mbedtls_to_psa_error(
mbedtls_mpi_write_binary(&operation->s,
mbedtls_mpi_write_binary(&s,
signature +
operation->curve_bytes,
operation->curve_bytes));
@@ -3645,9 +3647,6 @@ psa_status_t mbedtls_psa_sign_hash_abort(
mbedtls_ecdsa_restart_free(&operation->restart_ctx);
mbedtls_mpi_free(&operation->r);
mbedtls_mpi_free(&operation->s);
return PSA_SUCCESS;
#else