--- /dev/null
+/*
+ * Copyright 2019 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
+ */
+
+/* Dispatch functions for AES SIV mode */
+
+#include "cipher_aes_siv.h"
+#include "prov/implementations.h"
+#include "prov/providercommonerr.h"
+#include "prov/cipher_aead.h"
+
+#define siv_stream_update siv_cipher
+#define SIV_FLAGS AEAD_FLAGS
+
+static void *aes_siv_newctx(void *provctx, size_t keybits, unsigned int mode,
+ uint64_t flags)
+{
+ PROV_AES_SIV_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
+
+ if (ctx != NULL) {
+ ctx->taglen = SIV_LEN;
+ ctx->mode = mode;
+ ctx->flags = flags;
+ ctx->keylen = keybits / 8;
+ ctx->hw = PROV_CIPHER_HW_aes_siv(keybits);
+ }
+ return ctx;
+}
+
+static void aes_siv_freectx(void *vctx)
+{
+ PROV_AES_SIV_CTX *ctx = (PROV_AES_SIV_CTX *)vctx;
+
+ if (ctx != NULL) {
+ ctx->hw->cleanup(ctx);
+ OPENSSL_clear_free(ctx, sizeof(*ctx));
+ }
+}
+
+static int siv_init(void *vctx, const unsigned char *key, size_t keylen,
+ const unsigned char *iv, size_t ivlen, int enc)
+{
+ PROV_AES_SIV_CTX *ctx = (PROV_AES_SIV_CTX *)vctx;
+
+ ctx->enc = enc;
+
+ if (iv != NULL)
+ return 0;
+
+ if (key != NULL) {
+ if (keylen != ctx->keylen) {
+ ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
+ return 0;
+ }
+ return ctx->hw->initkey(ctx, key, ctx->keylen);
+ }
+ return 1;
+}
+
+static int siv_einit(void *vctx, const unsigned char *key, size_t keylen,
+ const unsigned char *iv, size_t ivlen)
+{
+ return siv_init(vctx, key, keylen, iv, ivlen, 1);
+}
+
+static int siv_dinit(void *vctx, const unsigned char *key, size_t keylen,
+ const unsigned char *iv, size_t ivlen)
+{
+ return siv_init(vctx, key, keylen, iv, ivlen, 0);
+}
+
+static int siv_cipher(void *vctx, unsigned char *out, size_t *outl,
+ size_t outsize, const unsigned char *in, size_t inl)
+{
+ PROV_AES_SIV_CTX *ctx = (PROV_AES_SIV_CTX *)vctx;
+
+ if (outsize < inl) {
+ ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
+ return 0;
+ }
+
+ if (ctx->hw->cipher(ctx, out, in, inl) <= 0)
+ return 0;
+
+ if (outl != NULL)
+ *outl = inl;
+ return 1;
+}
+
+static int siv_stream_final(void *vctx, unsigned char *out, size_t *outl,
+ size_t outsize)
+{
+ PROV_AES_SIV_CTX *ctx = (PROV_AES_SIV_CTX *)vctx;
+
+ if (!ctx->hw->cipher(vctx, out, NULL, 0))
+ return 0;
+
+ if (outl != NULL)
+ *outl = 0;
+ return 1;
+}
+
+static int aes_siv_get_ctx_params(void *vctx, OSSL_PARAM params[])
+{
+ PROV_AES_SIV_CTX *ctx = (PROV_AES_SIV_CTX *)vctx;
+ SIV128_CONTEXT *sctx = &ctx->siv;
+ OSSL_PARAM *p;
+
+ p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_AEAD_TAG);
+ if (p != NULL && p->data_type == OSSL_PARAM_OCTET_STRING) {
+ if (!ctx->enc
+ || p->data_size != ctx->taglen
+ || !OSSL_PARAM_set_octet_string(p, &sctx->tag.byte, ctx->taglen)) {
+ ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
+ return 0;
+ }
+ }
+ p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_AEAD_TAGLEN);
+ if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->taglen)) {
+ ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
+ return 0;
+ }
+ p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_KEYLEN);
+ if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->keylen)) {
+ ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
+ return 0;
+ }
+ return 1;
+}
+
+static const OSSL_PARAM aes_siv_known_gettable_ctx_params[] = {
+ OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
+ OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_AEAD_TAGLEN, NULL),
+ OSSL_PARAM_uint(OSSL_CIPHER_PARAM_SPEED, NULL),
+ OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, NULL, 0),
+ OSSL_PARAM_END
+};
+static const OSSL_PARAM *aes_siv_gettable_ctx_params(void)
+{
+ return aes_siv_known_gettable_ctx_params;
+}
+
+static int aes_siv_set_ctx_params(void *vctx, const OSSL_PARAM params[])
+{
+ PROV_AES_SIV_CTX *ctx = (PROV_AES_SIV_CTX *)vctx;
+ const OSSL_PARAM *p;
+ unsigned int speed = 0;
+
+ p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_AEAD_TAG);
+ if (p != NULL) {
+ if (ctx->enc)
+ return 1;
+ if (p->data_type != OSSL_PARAM_OCTET_STRING
+ || !ctx->hw->settag(ctx, p->data, p->data_size)) {
+ ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
+ return 0;
+ }
+ }
+ p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_SPEED);
+ if (p != NULL) {
+ if (!OSSL_PARAM_get_uint(p, &speed)) {
+ ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
+ return 0;
+ }
+ ctx->hw->setspeed(ctx, (int)speed);
+ }
+ p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN);
+ if (p != NULL) {
+ size_t keylen;
+
+ if (!OSSL_PARAM_get_size_t(p, &keylen)) {
+ ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
+ return 0;
+ }
+ /* The key length can not be modified */
+ if (keylen != ctx->keylen)
+ return 0;
+ }
+ return 1;
+}
+
+static const OSSL_PARAM aes_siv_known_settable_ctx_params[] = {
+ OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
+ OSSL_PARAM_uint(OSSL_CIPHER_PARAM_SPEED, NULL),
+ OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, NULL, 0),
+ OSSL_PARAM_END
+};
+static const OSSL_PARAM *aes_siv_settable_ctx_params(void)
+{
+ return aes_siv_known_settable_ctx_params;
+}
+
+#define IMPLEMENT_cipher(alg, lc, UCMODE, flags, kbits, blkbits, ivbits) \
+static OSSL_OP_cipher_get_params_fn alg##_##kbits##_##lc##_get_params; \
+static int alg##_##kbits##_##lc##_get_params(OSSL_PARAM params[]) \
+{ \
+ return cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, \
+ flags, 2*kbits, blkbits, ivbits); \
+} \
+static OSSL_OP_cipher_newctx_fn alg##kbits##lc##_newctx; \
+static void * alg##kbits##lc##_newctx(void *provctx) \
+{ \
+ return alg##_##lc##_newctx(provctx, 2*kbits, EVP_CIPH_##UCMODE##_MODE, \
+ flags); \
+} \
+const OSSL_DISPATCH alg##kbits##lc##_functions[] = { \
+ { OSSL_FUNC_CIPHER_NEWCTX, (void (*)(void))alg##kbits##lc##_newctx }, \
+ { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))alg##_##lc##_freectx }, \
+ { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void)) lc##_einit }, \
+ { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void)) lc##_dinit }, \
+ { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void)) lc##_stream_update }, \
+ { OSSL_FUNC_CIPHER_FINAL, (void (*)(void)) lc##_stream_final }, \
+ { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void)) lc##_cipher }, \
+ { OSSL_FUNC_CIPHER_GET_PARAMS, \
+ (void (*)(void)) alg##_##kbits##_##lc##_get_params }, \
+ { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \
+ (void (*)(void))cipher_generic_gettable_params }, \
+ { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \
+ (void (*)(void)) alg##_##lc##_get_ctx_params }, \
+ { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \
+ (void (*)(void)) alg##_##lc##_gettable_ctx_params }, \
+ { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \
+ (void (*)(void)) alg##_##lc##_set_ctx_params }, \
+ { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \
+ (void (*)(void)) alg##_##lc##_settable_ctx_params }, \
+ { 0, NULL } \
+};
+
+IMPLEMENT_cipher(aes, siv, SIV, SIV_FLAGS, 128, 8, 0)
+IMPLEMENT_cipher(aes, siv, SIV, SIV_FLAGS, 192, 8, 0)
+IMPLEMENT_cipher(aes, siv, SIV, SIV_FLAGS, 256, 8, 0)
--- /dev/null
+/*
+ * Copyright 2019 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 "cipher_aes_siv.h"
+
+static int aes_siv_initkey(void *vctx, const unsigned char *key, size_t keylen)
+{
+ PROV_AES_SIV_CTX *ctx = (PROV_AES_SIV_CTX *)vctx;
+ SIV128_CONTEXT *sctx = &ctx->siv;
+ size_t klen = keylen / 2;
+
+ switch (klen) {
+ case 16:
+ ctx->cbc = EVP_CIPHER_fetch(NULL, "AES-128-CBC", "");
+ ctx->ctr = EVP_CIPHER_fetch(NULL, "AES-128-CTR", "");
+ break;
+ case 24:
+ ctx->cbc = EVP_CIPHER_fetch(NULL, "AES-192-CBC", "");
+ ctx->ctr = EVP_CIPHER_fetch(NULL, "AES-192-CTR", "");
+ break;
+ case 32:
+ ctx->cbc = EVP_CIPHER_fetch(NULL, "AES-256-CBC", "");
+ ctx->ctr = EVP_CIPHER_fetch(NULL, "AES-256-CTR", "");
+ break;
+ default:
+ return 0;
+ }
+ /*
+ * klen is the length of the underlying cipher, not the input key,
+ * which should be twice as long
+ */
+ return CRYPTO_siv128_init(sctx, key, klen, ctx->cbc, ctx->ctr);
+}
+
+static int aes_siv_settag(void *vctx, const unsigned char *tag, size_t tagl)
+{
+ PROV_AES_SIV_CTX *ctx = (PROV_AES_SIV_CTX *)vctx;
+ SIV128_CONTEXT *sctx = &ctx->siv;
+
+ return CRYPTO_siv128_set_tag(sctx, tag, tagl);
+}
+
+static void aes_siv_setspeed(void *vctx, int speed)
+{
+ PROV_AES_SIV_CTX *ctx = (PROV_AES_SIV_CTX *)vctx;
+ SIV128_CONTEXT *sctx = &ctx->siv;
+
+ CRYPTO_siv128_speed(sctx, (int)speed);
+}
+
+static void aes_siv_cleanup(void *vctx)
+{
+ PROV_AES_SIV_CTX *ctx = (PROV_AES_SIV_CTX *)vctx;
+ SIV128_CONTEXT *sctx = &ctx->siv;
+
+ CRYPTO_siv128_cleanup(sctx);
+ EVP_CIPHER_free(ctx->cbc);
+ EVP_CIPHER_free(ctx->ctr);
+}
+
+static int aes_siv_cipher(void *vctx, unsigned char *out,
+ const unsigned char *in, size_t len)
+{
+ PROV_AES_SIV_CTX *ctx = (PROV_AES_SIV_CTX *)vctx;
+ SIV128_CONTEXT *sctx = &ctx->siv;
+
+ /* EncryptFinal or DecryptFinal */
+ if (in == NULL)
+ return CRYPTO_siv128_finish(sctx) == 0;
+
+ /* Deal with associated data */
+ if (out == NULL)
+ return (CRYPTO_siv128_aad(sctx, in, len) == 1);
+
+ if (ctx->enc)
+ return CRYPTO_siv128_encrypt(sctx, in, out, len) > 0;
+
+ return CRYPTO_siv128_decrypt(sctx, in, out, len) > 0;
+}
+
+static const PROV_CIPHER_HW_AES_SIV aes_siv_hw =
+{
+ aes_siv_initkey,
+ aes_siv_cipher,
+ aes_siv_setspeed,
+ aes_siv_settag,
+ aes_siv_cleanup
+};
+
+const PROV_CIPHER_HW_AES_SIV *PROV_CIPHER_HW_aes_siv(size_t keybits)
+{
+ return &aes_siv_hw;
+}
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