+++ /dev/null
-/*
- * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the Apache License 2.0 (the "License"). You may not use
- * this file except in compliance with the License. You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
-
-#include <openssl/crypto.h>
-#include <openssl/core_dispatch.h>
-#include <openssl/core_names.h>
-#include <openssl/err.h>
-#include <openssl/params.h>
-#include <openssl/evp.h>
-#include <openssl/err.h>
-#include <openssl/proverr.h>
-#include "internal/nelem.h"
-#include "internal/sizes.h"
-#include "prov/providercommon.h"
-#include "prov/implementations.h"
-#include "prov/provider_ctx.h"
-#include "prov/der_ecx.h"
-#include "crypto/ecx.h"
-
-#ifdef S390X_EC_ASM
-# include "s390x_arch.h"
-
-# define S390X_CAN_SIGN(edtype) \
-((OPENSSL_s390xcap_P.pcc[1] & S390X_CAPBIT(S390X_SCALAR_MULTIPLY_##edtype)) \
-&& (OPENSSL_s390xcap_P.kdsa[0] & S390X_CAPBIT(S390X_EDDSA_SIGN_##edtype)) \
-&& (OPENSSL_s390xcap_P.kdsa[0] & S390X_CAPBIT(S390X_EDDSA_VERIFY_##edtype)))
-
-static int s390x_ed25519_digestsign(const ECX_KEY *edkey, unsigned char *sig,
- const unsigned char *tbs, size_t tbslen);
-static int s390x_ed448_digestsign(const ECX_KEY *edkey, unsigned char *sig,
- const unsigned char *tbs, size_t tbslen);
-static int s390x_ed25519_digestverify(const ECX_KEY *edkey,
- const unsigned char *sig,
- const unsigned char *tbs, size_t tbslen);
-static int s390x_ed448_digestverify(const ECX_KEY *edkey,
- const unsigned char *sig,
- const unsigned char *tbs, size_t tbslen);
-
-#endif /* S390X_EC_ASM */
-
-static OSSL_FUNC_signature_newctx_fn eddsa_newctx;
-static OSSL_FUNC_signature_digest_sign_init_fn eddsa_digest_signverify_init;
-static OSSL_FUNC_signature_digest_sign_fn ed25519_digest_sign;
-static OSSL_FUNC_signature_digest_sign_fn ed448_digest_sign;
-static OSSL_FUNC_signature_digest_verify_fn ed25519_digest_verify;
-static OSSL_FUNC_signature_digest_verify_fn ed448_digest_verify;
-static OSSL_FUNC_signature_freectx_fn eddsa_freectx;
-static OSSL_FUNC_signature_dupctx_fn eddsa_dupctx;
-static OSSL_FUNC_signature_get_ctx_params_fn eddsa_get_ctx_params;
-static OSSL_FUNC_signature_gettable_ctx_params_fn eddsa_gettable_ctx_params;
-
-typedef struct {
- OSSL_LIB_CTX *libctx;
- ECX_KEY *key;
-
- /* The Algorithm Identifier of the signature algorithm */
- unsigned char aid_buf[OSSL_MAX_ALGORITHM_ID_SIZE];
- unsigned char *aid;
- size_t aid_len;
-} PROV_EDDSA_CTX;
-
-static void *eddsa_newctx(void *provctx, const char *propq_unused)
-{
- PROV_EDDSA_CTX *peddsactx;
-
- if (!ossl_prov_is_running())
- return NULL;
-
- peddsactx = OPENSSL_zalloc(sizeof(PROV_EDDSA_CTX));
- if (peddsactx == NULL) {
- ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
-
- peddsactx->libctx = PROV_LIBCTX_OF(provctx);
-
- return peddsactx;
-}
-
-static int eddsa_digest_signverify_init(void *vpeddsactx, const char *mdname,
- void *vedkey)
-{
- PROV_EDDSA_CTX *peddsactx = (PROV_EDDSA_CTX *)vpeddsactx;
- ECX_KEY *edkey = (ECX_KEY *)vedkey;
- WPACKET pkt;
- int ret;
-
- if (!ossl_prov_is_running())
- return 0;
-
- if (mdname != NULL && mdname[0] != '\0') {
- ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_DIGEST);
- return 0;
- }
-
- if (!ossl_ecx_key_up_ref(edkey)) {
- ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
- return 0;
- }
-
- /*
- * TODO(3.0) Should we care about DER writing errors?
- * All it really means is that for some reason, there's no
- * AlgorithmIdentifier to be had, but the operation itself is
- * still valid, just as long as it's not used to construct
- * anything that needs an AlgorithmIdentifier.
- */
- peddsactx->aid_len = 0;
- ret = WPACKET_init_der(&pkt, peddsactx->aid_buf, sizeof(peddsactx->aid_buf));
- switch (edkey->type) {
- case ECX_KEY_TYPE_ED25519:
- ret = ret && ossl_DER_w_algorithmIdentifier_ED25519(&pkt, -1, edkey);
- break;
- case ECX_KEY_TYPE_ED448:
- ret = ret && ossl_DER_w_algorithmIdentifier_ED448(&pkt, -1, edkey);
- break;
- default:
- /* Should never happen */
- ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
- return 0;
- }
- if (ret && WPACKET_finish(&pkt)) {
- WPACKET_get_total_written(&pkt, &peddsactx->aid_len);
- peddsactx->aid = WPACKET_get_curr(&pkt);
- }
- WPACKET_cleanup(&pkt);
-
- peddsactx->key = edkey;
-
- return 1;
-}
-
-int ed25519_digest_sign(void *vpeddsactx, unsigned char *sigret,
- size_t *siglen, size_t sigsize,
- const unsigned char *tbs, size_t tbslen)
-{
- PROV_EDDSA_CTX *peddsactx = (PROV_EDDSA_CTX *)vpeddsactx;
- const ECX_KEY *edkey = peddsactx->key;
-
- if (!ossl_prov_is_running())
- return 0;
-
- if (sigret == NULL) {
- *siglen = ED25519_SIGSIZE;
- return 1;
- }
- if (sigsize < ED25519_SIGSIZE) {
- ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
- return 0;
- }
-#ifdef S390X_EC_ASM
- if (S390X_CAN_SIGN(ED25519))
- return s390x_ed25519_digestsign(edkey, sigret, tbs, tbslen);
-#endif /* S390X_EC_ASM */
- if (ED25519_sign(sigret, tbs, tbslen, edkey->pubkey, edkey->privkey,
- peddsactx->libctx, NULL) == 0) {
- ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SIGN);
- return 0;
- }
- *siglen = ED25519_SIGSIZE;
- return 1;
-}
-
-int ed448_digest_sign(void *vpeddsactx, unsigned char *sigret,
- size_t *siglen, size_t sigsize,
- const unsigned char *tbs, size_t tbslen)
-{
- PROV_EDDSA_CTX *peddsactx = (PROV_EDDSA_CTX *)vpeddsactx;
- const ECX_KEY *edkey = peddsactx->key;
-
- if (!ossl_prov_is_running())
- return 0;
-
- if (sigret == NULL) {
- *siglen = ED448_SIGSIZE;
- return 1;
- }
- if (sigsize < ED448_SIGSIZE) {
- ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
- return 0;
- }
-#ifdef S390X_EC_ASM
- if (S390X_CAN_SIGN(ED448))
- return s390x_ed448_digestsign(edkey, sigret, tbs, tbslen);
-#endif /* S390X_EC_ASM */
- if (ED448_sign(peddsactx->libctx, sigret, tbs, tbslen, edkey->pubkey,
- edkey->privkey, NULL, 0, edkey->propq) == 0) {
- ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SIGN);
- return 0;
- }
- *siglen = ED448_SIGSIZE;
- return 1;
-}
-
-int ed25519_digest_verify(void *vpeddsactx, const unsigned char *sig,
- size_t siglen, const unsigned char *tbs,
- size_t tbslen)
-{
- PROV_EDDSA_CTX *peddsactx = (PROV_EDDSA_CTX *)vpeddsactx;
- const ECX_KEY *edkey = peddsactx->key;
-
- if (!ossl_prov_is_running() || siglen != ED25519_SIGSIZE)
- return 0;
-
-#ifdef S390X_EC_ASM
- if (S390X_CAN_SIGN(ED25519))
- return s390x_ed25519_digestverify(edkey, sig, tbs, tbslen);
-#endif /* S390X_EC_ASM */
-
- return ED25519_verify(tbs, tbslen, sig, edkey->pubkey, peddsactx->libctx,
- edkey->propq);
-}
-
-int ed448_digest_verify(void *vpeddsactx, const unsigned char *sig,
- size_t siglen, const unsigned char *tbs,
- size_t tbslen)
-{
- PROV_EDDSA_CTX *peddsactx = (PROV_EDDSA_CTX *)vpeddsactx;
- const ECX_KEY *edkey = peddsactx->key;
-
- if (!ossl_prov_is_running() || siglen != ED448_SIGSIZE)
- return 0;
-
-#ifdef S390X_EC_ASM
- if (S390X_CAN_SIGN(ED448))
- return s390x_ed448_digestverify(edkey, sig, tbs, tbslen);
-#endif /* S390X_EC_ASM */
-
- return ED448_verify(peddsactx->libctx, tbs, tbslen, sig, edkey->pubkey,
- NULL, 0, edkey->propq);
-}
-
-static void eddsa_freectx(void *vpeddsactx)
-{
- PROV_EDDSA_CTX *peddsactx = (PROV_EDDSA_CTX *)vpeddsactx;
-
- ossl_ecx_key_free(peddsactx->key);
-
- OPENSSL_free(peddsactx);
-}
-
-static void *eddsa_dupctx(void *vpeddsactx)
-{
- PROV_EDDSA_CTX *srcctx = (PROV_EDDSA_CTX *)vpeddsactx;
- PROV_EDDSA_CTX *dstctx;
-
- if (!ossl_prov_is_running())
- return NULL;
-
- dstctx = OPENSSL_zalloc(sizeof(*srcctx));
- if (dstctx == NULL)
- return NULL;
-
- *dstctx = *srcctx;
- dstctx->key = NULL;
-
- if (srcctx->key != NULL && !ossl_ecx_key_up_ref(srcctx->key)) {
- ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- dstctx->key = srcctx->key;
-
- return dstctx;
- err:
- eddsa_freectx(dstctx);
- return NULL;
-}
-
-static int eddsa_get_ctx_params(void *vpeddsactx, OSSL_PARAM *params)
-{
- PROV_EDDSA_CTX *peddsactx = (PROV_EDDSA_CTX *)vpeddsactx;
- OSSL_PARAM *p;
-
- if (peddsactx == NULL || params == NULL)
- return 0;
-
- p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_ALGORITHM_ID);
- if (p != NULL && !OSSL_PARAM_set_octet_string(p, peddsactx->aid,
- peddsactx->aid_len))
- return 0;
-
- return 1;
-}
-
-static const OSSL_PARAM known_gettable_ctx_params[] = {
- OSSL_PARAM_octet_string(OSSL_SIGNATURE_PARAM_ALGORITHM_ID, NULL, 0),
- OSSL_PARAM_END
-};
-
-static const OSSL_PARAM *eddsa_gettable_ctx_params(ossl_unused void *provctx)
-{
- return known_gettable_ctx_params;
-}
-
-const OSSL_DISPATCH ossl_ed25519_signature_functions[] = {
- { OSSL_FUNC_SIGNATURE_NEWCTX, (void (*)(void))eddsa_newctx },
- { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_INIT,
- (void (*)(void))eddsa_digest_signverify_init },
- { OSSL_FUNC_SIGNATURE_DIGEST_SIGN,
- (void (*)(void))ed25519_digest_sign },
- { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT,
- (void (*)(void))eddsa_digest_signverify_init },
- { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY,
- (void (*)(void))ed25519_digest_verify },
- { OSSL_FUNC_SIGNATURE_FREECTX, (void (*)(void))eddsa_freectx },
- { OSSL_FUNC_SIGNATURE_DUPCTX, (void (*)(void))eddsa_dupctx },
- { OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS, (void (*)(void))eddsa_get_ctx_params },
- { OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS,
- (void (*)(void))eddsa_gettable_ctx_params },
- { 0, NULL }
-};
-
-const OSSL_DISPATCH ossl_ed448_signature_functions[] = {
- { OSSL_FUNC_SIGNATURE_NEWCTX, (void (*)(void))eddsa_newctx },
- { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_INIT,
- (void (*)(void))eddsa_digest_signverify_init },
- { OSSL_FUNC_SIGNATURE_DIGEST_SIGN,
- (void (*)(void))ed448_digest_sign },
- { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT,
- (void (*)(void))eddsa_digest_signverify_init },
- { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY,
- (void (*)(void))ed448_digest_verify },
- { OSSL_FUNC_SIGNATURE_FREECTX, (void (*)(void))eddsa_freectx },
- { OSSL_FUNC_SIGNATURE_DUPCTX, (void (*)(void))eddsa_dupctx },
- { OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS, (void (*)(void))eddsa_get_ctx_params },
- { OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS,
- (void (*)(void))eddsa_gettable_ctx_params },
- { 0, NULL }
-};
-
-#ifdef S390X_EC_ASM
-
-static int s390x_ed25519_digestsign(const ECX_KEY *edkey, unsigned char *sig,
- const unsigned char *tbs, size_t tbslen)
-{
- int rc;
- union {
- struct {
- unsigned char sig[64];
- unsigned char priv[32];
- } ed25519;
- unsigned long long buff[512];
- } param;
-
- memset(¶m, 0, sizeof(param));
- memcpy(param.ed25519.priv, edkey->privkey, sizeof(param.ed25519.priv));
-
- rc = s390x_kdsa(S390X_EDDSA_SIGN_ED25519, ¶m.ed25519, tbs, tbslen);
- OPENSSL_cleanse(param.ed25519.priv, sizeof(param.ed25519.priv));
- if (rc != 0)
- return 0;
-
- s390x_flip_endian32(sig, param.ed25519.sig);
- s390x_flip_endian32(sig + 32, param.ed25519.sig + 32);
- return 1;
-}
-
-static int s390x_ed448_digestsign(const ECX_KEY *edkey, unsigned char *sig,
- const unsigned char *tbs, size_t tbslen)
-{
- int rc;
- union {
- struct {
- unsigned char sig[128];
- unsigned char priv[64];
- } ed448;
- unsigned long long buff[512];
- } param;
-
- memset(¶m, 0, sizeof(param));
- memcpy(param.ed448.priv + 64 - 57, edkey->privkey, 57);
-
- rc = s390x_kdsa(S390X_EDDSA_SIGN_ED448, ¶m.ed448, tbs, tbslen);
- OPENSSL_cleanse(param.ed448.priv, sizeof(param.ed448.priv));
- if (rc != 0)
- return 0;
-
- s390x_flip_endian64(param.ed448.sig, param.ed448.sig);
- s390x_flip_endian64(param.ed448.sig + 64, param.ed448.sig + 64);
- memcpy(sig, param.ed448.sig, 57);
- memcpy(sig + 57, param.ed448.sig + 64, 57);
- return 1;
-}
-
-static int s390x_ed25519_digestverify(const ECX_KEY *edkey,
- const unsigned char *sig,
- const unsigned char *tbs, size_t tbslen)
-{
- union {
- struct {
- unsigned char sig[64];
- unsigned char pub[32];
- } ed25519;
- unsigned long long buff[512];
- } param;
-
- memset(¶m, 0, sizeof(param));
- s390x_flip_endian32(param.ed25519.sig, sig);
- s390x_flip_endian32(param.ed25519.sig + 32, sig + 32);
- s390x_flip_endian32(param.ed25519.pub, edkey->pubkey);
-
- return s390x_kdsa(S390X_EDDSA_VERIFY_ED25519,
- ¶m.ed25519, tbs, tbslen) == 0 ? 1 : 0;
-}
-
-static int s390x_ed448_digestverify(const ECX_KEY *edkey,
- const unsigned char *sig,
- const unsigned char *tbs,
- size_t tbslen)
-{
- union {
- struct {
- unsigned char sig[128];
- unsigned char pub[64];
- } ed448;
- unsigned long long buff[512];
- } param;
-
- memset(¶m, 0, sizeof(param));
- memcpy(param.ed448.sig, sig, 57);
- s390x_flip_endian64(param.ed448.sig, param.ed448.sig);
- memcpy(param.ed448.sig + 64, sig + 57, 57);
- s390x_flip_endian64(param.ed448.sig + 64, param.ed448.sig + 64);
- memcpy(param.ed448.pub, edkey->pubkey, 57);
- s390x_flip_endian64(param.ed448.pub, param.ed448.pub);
-
- return s390x_kdsa(S390X_EDDSA_VERIFY_ED448,
- ¶m.ed448, tbs, tbslen) == 0 ? 1 : 0;
-}
-
-#endif /* S390X_EC_ASM */
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