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feat(mbedtls): Wrap mbedtls_ecdsa_read_signature to use ECDSA hardware when possible

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This commit is contained in:
harshal.patil 2024-09-05 12:19:00 +05:30
parent f648fca1b9
commit 9ebd2ed8fe
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GPG Key ID: 5B5EC97C35B9A2E5
2 changed files with 113 additions and 4 deletions
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3
components/mbedtls/CMakeLists.txt
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@ -266,6 +266,9 @@ if(CONFIG_MBEDTLS_HARDWARE_ECDSA_SIGN OR CONFIG_MBEDTLS_HARDWARE_ECDSA_VERIFY)
if(CONFIG_MBEDTLS_HARDWARE_ECDSA_VERIFY)
target_link_libraries(${COMPONENT_LIB} INTERFACE "-Wl,--wrap=mbedtls_ecdsa_verify")
target_link_libraries(${COMPONENT_LIB} INTERFACE "-Wl,--wrap=mbedtls_ecdsa_verify_restartable")
target_link_libraries(${COMPONENT_LIB} INTERFACE "-Wl,--wrap=mbedtls_ecdsa_read_signature")
target_link_libraries(${COMPONENT_LIB} INTERFACE "-Wl,--wrap=mbedtls_ecdsa_read_signature_restartable")
endif()
endif()

114
components/mbedtls/port/ecdsa/ecdsa_alt.c
View File

@ -10,6 +10,7 @@
#include "mbedtls/ecp.h"
#include "mbedtls/error.h"
#include "mbedtls/ecdsa.h"
#include "mbedtls/asn1.h"
#include "mbedtls/asn1write.h"
#include "mbedtls/platform_util.h"
#include "esp_private/periph_ctrl.h"
@ -417,6 +418,37 @@ static int esp_ecdsa_verify(mbedtls_ecp_group *grp,
return ret;
}
/*
* Verify ECDSA signature of hashed message
*/
extern int __real_mbedtls_ecdsa_verify_restartable(mbedtls_ecp_group *grp,
const unsigned char *buf, size_t blen,
const mbedtls_ecp_point *Q,
const mbedtls_mpi *r,
const mbedtls_mpi *s,
mbedtls_ecdsa_restart_ctx *rs_ctx);
int __wrap_mbedtls_ecdsa_verify_restartable(mbedtls_ecp_group *grp,
const unsigned char *buf, size_t blen,
const mbedtls_ecp_point *Q,
const mbedtls_mpi *r,
const mbedtls_mpi *s,
mbedtls_ecdsa_restart_ctx *rs_ctx);
int __wrap_mbedtls_ecdsa_verify_restartable(mbedtls_ecp_group *grp,
const unsigned char *buf, size_t blen,
const mbedtls_ecp_point *Q,
const mbedtls_mpi *r,
const mbedtls_mpi *s,
mbedtls_ecdsa_restart_ctx *rs_ctx)
{
if ((grp->id == MBEDTLS_ECP_DP_SECP192R1 || grp->id == MBEDTLS_ECP_DP_SECP256R1) && blen == ECDSA_SHA_LEN) {
return esp_ecdsa_verify(grp, buf, blen, Q, r, s);
} else {
return __real_mbedtls_ecdsa_verify_restartable(grp, buf, blen, Q, r, s, rs_ctx);
}
}
/*
* Verify ECDSA signature of hashed message
*/
@ -438,10 +470,84 @@ int __wrap_mbedtls_ecdsa_verify(mbedtls_ecp_group *grp,
const mbedtls_mpi *r,
const mbedtls_mpi *s)
{
if ((grp->id == MBEDTLS_ECP_DP_SECP192R1 || grp->id == MBEDTLS_ECP_DP_SECP256R1) && blen == ECDSA_SHA_LEN) {
return esp_ecdsa_verify(grp, buf, blen, Q, r, s);
} else {
return __real_mbedtls_ecdsa_verify(grp, buf, blen, Q, r, s);
return __wrap_mbedtls_ecdsa_verify_restartable(grp, buf, blen, Q, r, s, NULL);
}
int __real_mbedtls_ecdsa_read_signature_restartable(mbedtls_ecdsa_context *ctx,
const unsigned char *hash, size_t hlen,
const unsigned char *sig, size_t slen,
mbedtls_ecdsa_restart_ctx *rs_ctx);
int __wrap_mbedtls_ecdsa_read_signature_restartable(mbedtls_ecdsa_context *ctx,
const unsigned char *hash, size_t hlen,
const unsigned char *sig, size_t slen,
mbedtls_ecdsa_restart_ctx *rs_ctx);
int __wrap_mbedtls_ecdsa_read_signature_restartable(mbedtls_ecdsa_context *ctx,
const unsigned char *hash, size_t hlen,
const unsigned char *sig, size_t slen,
mbedtls_ecdsa_restart_ctx *rs_ctx)
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char *p = (unsigned char *) sig;
const unsigned char *end = sig + slen;
size_t len;
mbedtls_mpi r, s;
mbedtls_mpi_init(&r);
mbedtls_mpi_init(&s);
if ((ret = mbedtls_asn1_get_tag(&p, end, &len,
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
ret += MBEDTLS_ERR_ECP_BAD_INPUT_DATA;
goto cleanup;
}
if (p + len != end) {
ret = MBEDTLS_ERROR_ADD(MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
goto cleanup;
}
if ((ret = mbedtls_asn1_get_mpi(&p, end, &r)) != 0 ||
(ret = mbedtls_asn1_get_mpi(&p, end, &s)) != 0) {
ret += MBEDTLS_ERR_ECP_BAD_INPUT_DATA;
goto cleanup;
}
if ((ret = __wrap_mbedtls_ecdsa_verify_restartable(&ctx->MBEDTLS_PRIVATE(grp), hash, hlen,
&ctx->MBEDTLS_PRIVATE(Q), &r, &s, NULL)) != 0) {
goto cleanup;
}
/* At this point we know that the buffer starts with a valid signature.
* Return 0 if the buffer just contains the signature, and a specific
* error code if the valid signature is followed by more data. */
if (p != end) {
ret = MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH;
}
cleanup:
mbedtls_mpi_free(&r);
mbedtls_mpi_free(&s);
return ret;
}
int __real_mbedtls_ecdsa_read_signature(mbedtls_ecdsa_context *ctx,
const unsigned char *hash, size_t hlen,
const unsigned char *sig, size_t slen);
int __wrap_mbedtls_ecdsa_read_signature(mbedtls_ecdsa_context *ctx,
const unsigned char *hash, size_t hlen,
const unsigned char *sig, size_t slen);
int __wrap_mbedtls_ecdsa_read_signature(mbedtls_ecdsa_context *ctx,
const unsigned char *hash, size_t hlen,
const unsigned char *sig, size_t slen)
{
return __wrap_mbedtls_ecdsa_read_signature_restartable(
ctx, hash, hlen, sig, slen, NULL);
}
#endif /* CONFIG_MBEDTLS_HARDWARE_ECDSA_VERIFY */