2 * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include <openssl/crypto.h>
11 #include <openssl/core_dispatch.h>
12 #include <openssl/core_names.h>
13 #include <openssl/err.h>
14 #include <openssl/params.h>
15 #include <openssl/evp.h>
16 #include <openssl/err.h>
17 #include <openssl/proverr.h>
18 #include "internal/nelem.h"
19 #include "internal/sizes.h"
20 #include "prov/providercommon.h"
21 #include "prov/implementations.h"
22 #include "prov/provider_ctx.h"
23 #include "prov/der_ecx.h"
24 #include "crypto/ecx.h"
27 # include "s390x_arch.h"
29 # define S390X_CAN_SIGN(edtype) \
30 ((OPENSSL_s390xcap_P.pcc[1] & S390X_CAPBIT(S390X_SCALAR_MULTIPLY_##edtype)) \
31 && (OPENSSL_s390xcap_P.kdsa[0] & S390X_CAPBIT(S390X_EDDSA_SIGN_##edtype)) \
32 && (OPENSSL_s390xcap_P.kdsa[0] & S390X_CAPBIT(S390X_EDDSA_VERIFY_##edtype)))
34 static int s390x_ed25519_digestsign(const ECX_KEY *edkey, unsigned char *sig,
35 const unsigned char *tbs, size_t tbslen);
36 static int s390x_ed448_digestsign(const ECX_KEY *edkey, unsigned char *sig,
37 const unsigned char *tbs, size_t tbslen);
38 static int s390x_ed25519_digestverify(const ECX_KEY *edkey,
39 const unsigned char *sig,
40 const unsigned char *tbs, size_t tbslen);
41 static int s390x_ed448_digestverify(const ECX_KEY *edkey,
42 const unsigned char *sig,
43 const unsigned char *tbs, size_t tbslen);
45 #endif /* S390X_EC_ASM */
47 static OSSL_FUNC_signature_newctx_fn eddsa_newctx;
48 static OSSL_FUNC_signature_digest_sign_init_fn eddsa_digest_signverify_init;
49 static OSSL_FUNC_signature_digest_sign_fn ed25519_digest_sign;
50 static OSSL_FUNC_signature_digest_sign_fn ed448_digest_sign;
51 static OSSL_FUNC_signature_digest_verify_fn ed25519_digest_verify;
52 static OSSL_FUNC_signature_digest_verify_fn ed448_digest_verify;
53 static OSSL_FUNC_signature_freectx_fn eddsa_freectx;
54 static OSSL_FUNC_signature_dupctx_fn eddsa_dupctx;
55 static OSSL_FUNC_signature_get_ctx_params_fn eddsa_get_ctx_params;
56 static OSSL_FUNC_signature_gettable_ctx_params_fn eddsa_gettable_ctx_params;
62 /* The Algorithm Identifier of the signature algorithm */
63 unsigned char aid_buf[OSSL_MAX_ALGORITHM_ID_SIZE];
68 static void *eddsa_newctx(void *provctx, const char *propq_unused)
70 PROV_EDDSA_CTX *peddsactx;
72 if (!ossl_prov_is_running())
75 peddsactx = OPENSSL_zalloc(sizeof(PROV_EDDSA_CTX));
76 if (peddsactx == NULL) {
77 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
81 peddsactx->libctx = PROV_LIBCTX_OF(provctx);
86 static int eddsa_digest_signverify_init(void *vpeddsactx, const char *mdname,
88 ossl_unused const OSSL_PARAM params[])
90 PROV_EDDSA_CTX *peddsactx = (PROV_EDDSA_CTX *)vpeddsactx;
91 ECX_KEY *edkey = (ECX_KEY *)vedkey;
95 if (!ossl_prov_is_running())
98 if (mdname != NULL && mdname[0] != '\0') {
99 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_DIGEST);
103 if (!ossl_ecx_key_up_ref(edkey)) {
104 ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
109 * We do not care about DER writing errors.
110 * All it really means is that for some reason, there's no
111 * AlgorithmIdentifier to be had, but the operation itself is
112 * still valid, just as long as it's not used to construct
113 * anything that needs an AlgorithmIdentifier.
115 peddsactx->aid_len = 0;
116 ret = WPACKET_init_der(&pkt, peddsactx->aid_buf, sizeof(peddsactx->aid_buf));
117 switch (edkey->type) {
118 case ECX_KEY_TYPE_ED25519:
119 ret = ret && ossl_DER_w_algorithmIdentifier_ED25519(&pkt, -1, edkey);
121 case ECX_KEY_TYPE_ED448:
122 ret = ret && ossl_DER_w_algorithmIdentifier_ED448(&pkt, -1, edkey);
125 /* Should never happen */
126 ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
129 if (ret && WPACKET_finish(&pkt)) {
130 WPACKET_get_total_written(&pkt, &peddsactx->aid_len);
131 peddsactx->aid = WPACKET_get_curr(&pkt);
133 WPACKET_cleanup(&pkt);
135 peddsactx->key = edkey;
140 int ed25519_digest_sign(void *vpeddsactx, unsigned char *sigret,
141 size_t *siglen, size_t sigsize,
142 const unsigned char *tbs, size_t tbslen)
144 PROV_EDDSA_CTX *peddsactx = (PROV_EDDSA_CTX *)vpeddsactx;
145 const ECX_KEY *edkey = peddsactx->key;
147 if (!ossl_prov_is_running())
150 if (sigret == NULL) {
151 *siglen = ED25519_SIGSIZE;
154 if (sigsize < ED25519_SIGSIZE) {
155 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
159 if (S390X_CAN_SIGN(ED25519))
160 return s390x_ed25519_digestsign(edkey, sigret, tbs, tbslen);
161 #endif /* S390X_EC_ASM */
162 if (ossl_ed25519_sign(sigret, tbs, tbslen, edkey->pubkey, edkey->privkey,
163 peddsactx->libctx, NULL) == 0) {
164 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SIGN);
167 *siglen = ED25519_SIGSIZE;
171 int ed448_digest_sign(void *vpeddsactx, unsigned char *sigret,
172 size_t *siglen, size_t sigsize,
173 const unsigned char *tbs, size_t tbslen)
175 PROV_EDDSA_CTX *peddsactx = (PROV_EDDSA_CTX *)vpeddsactx;
176 const ECX_KEY *edkey = peddsactx->key;
178 if (!ossl_prov_is_running())
181 if (sigret == NULL) {
182 *siglen = ED448_SIGSIZE;
185 if (sigsize < ED448_SIGSIZE) {
186 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
190 if (S390X_CAN_SIGN(ED448))
191 return s390x_ed448_digestsign(edkey, sigret, tbs, tbslen);
192 #endif /* S390X_EC_ASM */
193 if (ossl_ed448_sign(peddsactx->libctx, sigret, tbs, tbslen, edkey->pubkey,
194 edkey->privkey, NULL, 0, edkey->propq) == 0) {
195 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SIGN);
198 *siglen = ED448_SIGSIZE;
202 int ed25519_digest_verify(void *vpeddsactx, const unsigned char *sig,
203 size_t siglen, const unsigned char *tbs,
206 PROV_EDDSA_CTX *peddsactx = (PROV_EDDSA_CTX *)vpeddsactx;
207 const ECX_KEY *edkey = peddsactx->key;
209 if (!ossl_prov_is_running() || siglen != ED25519_SIGSIZE)
213 if (S390X_CAN_SIGN(ED25519))
214 return s390x_ed25519_digestverify(edkey, sig, tbs, tbslen);
215 #endif /* S390X_EC_ASM */
217 return ossl_ed25519_verify(tbs, tbslen, sig, edkey->pubkey,
218 peddsactx->libctx, edkey->propq);
221 int ed448_digest_verify(void *vpeddsactx, const unsigned char *sig,
222 size_t siglen, const unsigned char *tbs,
225 PROV_EDDSA_CTX *peddsactx = (PROV_EDDSA_CTX *)vpeddsactx;
226 const ECX_KEY *edkey = peddsactx->key;
228 if (!ossl_prov_is_running() || siglen != ED448_SIGSIZE)
232 if (S390X_CAN_SIGN(ED448))
233 return s390x_ed448_digestverify(edkey, sig, tbs, tbslen);
234 #endif /* S390X_EC_ASM */
236 return ossl_ed448_verify(peddsactx->libctx, tbs, tbslen, sig, edkey->pubkey,
237 NULL, 0, edkey->propq);
240 static void eddsa_freectx(void *vpeddsactx)
242 PROV_EDDSA_CTX *peddsactx = (PROV_EDDSA_CTX *)vpeddsactx;
244 ossl_ecx_key_free(peddsactx->key);
246 OPENSSL_free(peddsactx);
249 static void *eddsa_dupctx(void *vpeddsactx)
251 PROV_EDDSA_CTX *srcctx = (PROV_EDDSA_CTX *)vpeddsactx;
252 PROV_EDDSA_CTX *dstctx;
254 if (!ossl_prov_is_running())
257 dstctx = OPENSSL_zalloc(sizeof(*srcctx));
264 if (srcctx->key != NULL && !ossl_ecx_key_up_ref(srcctx->key)) {
265 ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
268 dstctx->key = srcctx->key;
272 eddsa_freectx(dstctx);
276 static int eddsa_get_ctx_params(void *vpeddsactx, OSSL_PARAM *params)
278 PROV_EDDSA_CTX *peddsactx = (PROV_EDDSA_CTX *)vpeddsactx;
281 if (peddsactx == NULL)
284 p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_ALGORITHM_ID);
285 if (p != NULL && !OSSL_PARAM_set_octet_string(p, peddsactx->aid,
292 static const OSSL_PARAM known_gettable_ctx_params[] = {
293 OSSL_PARAM_octet_string(OSSL_SIGNATURE_PARAM_ALGORITHM_ID, NULL, 0),
297 static const OSSL_PARAM *eddsa_gettable_ctx_params(ossl_unused void *vpeddsactx,
298 ossl_unused void *provctx)
300 return known_gettable_ctx_params;
303 const OSSL_DISPATCH ossl_ed25519_signature_functions[] = {
304 { OSSL_FUNC_SIGNATURE_NEWCTX, (void (*)(void))eddsa_newctx },
305 { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_INIT,
306 (void (*)(void))eddsa_digest_signverify_init },
307 { OSSL_FUNC_SIGNATURE_DIGEST_SIGN,
308 (void (*)(void))ed25519_digest_sign },
309 { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT,
310 (void (*)(void))eddsa_digest_signverify_init },
311 { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY,
312 (void (*)(void))ed25519_digest_verify },
313 { OSSL_FUNC_SIGNATURE_FREECTX, (void (*)(void))eddsa_freectx },
314 { OSSL_FUNC_SIGNATURE_DUPCTX, (void (*)(void))eddsa_dupctx },
315 { OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS, (void (*)(void))eddsa_get_ctx_params },
316 { OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS,
317 (void (*)(void))eddsa_gettable_ctx_params },
321 const OSSL_DISPATCH ossl_ed448_signature_functions[] = {
322 { OSSL_FUNC_SIGNATURE_NEWCTX, (void (*)(void))eddsa_newctx },
323 { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_INIT,
324 (void (*)(void))eddsa_digest_signverify_init },
325 { OSSL_FUNC_SIGNATURE_DIGEST_SIGN,
326 (void (*)(void))ed448_digest_sign },
327 { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT,
328 (void (*)(void))eddsa_digest_signverify_init },
329 { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY,
330 (void (*)(void))ed448_digest_verify },
331 { OSSL_FUNC_SIGNATURE_FREECTX, (void (*)(void))eddsa_freectx },
332 { OSSL_FUNC_SIGNATURE_DUPCTX, (void (*)(void))eddsa_dupctx },
333 { OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS, (void (*)(void))eddsa_get_ctx_params },
334 { OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS,
335 (void (*)(void))eddsa_gettable_ctx_params },
341 static int s390x_ed25519_digestsign(const ECX_KEY *edkey, unsigned char *sig,
342 const unsigned char *tbs, size_t tbslen)
347 unsigned char sig[64];
348 unsigned char priv[32];
350 unsigned long long buff[512];
353 memset(¶m, 0, sizeof(param));
354 memcpy(param.ed25519.priv, edkey->privkey, sizeof(param.ed25519.priv));
356 rc = s390x_kdsa(S390X_EDDSA_SIGN_ED25519, ¶m.ed25519, tbs, tbslen);
357 OPENSSL_cleanse(param.ed25519.priv, sizeof(param.ed25519.priv));
361 s390x_flip_endian32(sig, param.ed25519.sig);
362 s390x_flip_endian32(sig + 32, param.ed25519.sig + 32);
366 static int s390x_ed448_digestsign(const ECX_KEY *edkey, unsigned char *sig,
367 const unsigned char *tbs, size_t tbslen)
372 unsigned char sig[128];
373 unsigned char priv[64];
375 unsigned long long buff[512];
378 memset(¶m, 0, sizeof(param));
379 memcpy(param.ed448.priv + 64 - 57, edkey->privkey, 57);
381 rc = s390x_kdsa(S390X_EDDSA_SIGN_ED448, ¶m.ed448, tbs, tbslen);
382 OPENSSL_cleanse(param.ed448.priv, sizeof(param.ed448.priv));
386 s390x_flip_endian64(param.ed448.sig, param.ed448.sig);
387 s390x_flip_endian64(param.ed448.sig + 64, param.ed448.sig + 64);
388 memcpy(sig, param.ed448.sig, 57);
389 memcpy(sig + 57, param.ed448.sig + 64, 57);
393 static int s390x_ed25519_digestverify(const ECX_KEY *edkey,
394 const unsigned char *sig,
395 const unsigned char *tbs, size_t tbslen)
399 unsigned char sig[64];
400 unsigned char pub[32];
402 unsigned long long buff[512];
405 memset(¶m, 0, sizeof(param));
406 s390x_flip_endian32(param.ed25519.sig, sig);
407 s390x_flip_endian32(param.ed25519.sig + 32, sig + 32);
408 s390x_flip_endian32(param.ed25519.pub, edkey->pubkey);
410 return s390x_kdsa(S390X_EDDSA_VERIFY_ED25519,
411 ¶m.ed25519, tbs, tbslen) == 0 ? 1 : 0;
414 static int s390x_ed448_digestverify(const ECX_KEY *edkey,
415 const unsigned char *sig,
416 const unsigned char *tbs,
421 unsigned char sig[128];
422 unsigned char pub[64];
424 unsigned long long buff[512];
427 memset(¶m, 0, sizeof(param));
428 memcpy(param.ed448.sig, sig, 57);
429 s390x_flip_endian64(param.ed448.sig, param.ed448.sig);
430 memcpy(param.ed448.sig + 64, sig + 57, 57);
431 s390x_flip_endian64(param.ed448.sig + 64, param.ed448.sig + 64);
432 memcpy(param.ed448.pub, edkey->pubkey, 57);
433 s390x_flip_endian64(param.ed448.pub, param.ed448.pub);
435 return s390x_kdsa(S390X_EDDSA_VERIFY_ED448,
436 ¶m.ed448, tbs, tbslen) == 0 ? 1 : 0;
439 #endif /* S390X_EC_ASM */