2 * Copyright 2006-2016 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
12 #include <openssl/objects.h>
13 #include <openssl/evp.h>
14 #include "internal/cryptlib.h"
15 #include "crypto/evp.h"
16 #include "internal/provider.h"
17 #include "evp_local.h"
19 static int evp_pkey_asym_cipher_init(EVP_PKEY_CTX *ctx, int operation)
23 EVP_ASYM_CIPHER *cipher = NULL;
24 EVP_KEYMGMT *tmp_keymgmt = NULL;
25 const char *supported_ciph = NULL;
28 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
32 evp_pkey_ctx_free_old_ops(ctx);
33 ctx->operation = operation;
35 if (ctx->keytype == NULL || ctx->engine != NULL)
38 /* Ensure that the key is provided. If not, go legacy */
39 tmp_keymgmt = ctx->keymgmt;
40 provkey = evp_pkey_make_provided(ctx->pkey, ctx->libctx,
41 &tmp_keymgmt, ctx->propquery, 0);
44 EVP_KEYMGMT_up_ref(tmp_keymgmt);
45 EVP_KEYMGMT_free(ctx->keymgmt);
46 ctx->keymgmt = tmp_keymgmt;
48 if (ctx->keymgmt->query_operation_name != NULL)
50 ctx->keymgmt->query_operation_name(OSSL_OP_ASYM_CIPHER);
53 * If we didn't get a supported ciph, assume there is one with the
54 * same name as the key type.
56 if (supported_ciph == NULL)
57 supported_ciph = ctx->keytype;
60 * Because we cleared out old ops, we shouldn't need to worry about
61 * checking if cipher is already there.
64 EVP_ASYM_CIPHER_fetch(ctx->libctx, supported_ciph, ctx->propquery);
67 || (EVP_KEYMGMT_provider(ctx->keymgmt)
68 != EVP_ASYM_CIPHER_provider(cipher))) {
70 * We don't have the full support we need with provided methods,
71 * let's go see if legacy does. Also, we don't need to free
72 * ctx->keymgmt here, as it's not necessarily tied to this
73 * operation. It will be freed by EVP_PKEY_CTX_free().
75 EVP_ASYM_CIPHER_free(cipher);
79 ctx->op.ciph.cipher = cipher;
80 ctx->op.ciph.ciphprovctx = cipher->newctx(ossl_provider_ctx(cipher->prov));
81 if (ctx->op.ciph.ciphprovctx == NULL) {
82 /* The provider key can stay in the cache */
83 EVPerr(0, EVP_R_INITIALIZATION_ERROR);
88 case EVP_PKEY_OP_ENCRYPT:
89 if (cipher->encrypt_init == NULL) {
90 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
94 ret = cipher->encrypt_init(ctx->op.ciph.ciphprovctx, provkey);
96 case EVP_PKEY_OP_DECRYPT:
97 if (cipher->decrypt_init == NULL) {
98 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
102 ret = cipher->decrypt_init(ctx->op.ciph.ciphprovctx, provkey);
105 EVPerr(0, EVP_R_INITIALIZATION_ERROR);
110 cipher->freectx(ctx->op.ciph.ciphprovctx);
111 ctx->op.ciph.ciphprovctx = NULL;
117 if (ctx->pmeth == NULL || ctx->pmeth->encrypt == NULL) {
118 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
121 switch(ctx->operation) {
122 case EVP_PKEY_OP_ENCRYPT:
123 if (ctx->pmeth->encrypt_init == NULL)
125 ret = ctx->pmeth->encrypt_init(ctx);
127 case EVP_PKEY_OP_DECRYPT:
128 if (ctx->pmeth->decrypt_init == NULL)
130 ret = ctx->pmeth->decrypt_init(ctx);
133 EVPerr(0, EVP_R_INITIALIZATION_ERROR);
139 ctx->operation = EVP_PKEY_OP_UNDEFINED;
143 int EVP_PKEY_encrypt_init(EVP_PKEY_CTX *ctx)
145 return evp_pkey_asym_cipher_init(ctx, EVP_PKEY_OP_ENCRYPT);
148 int EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx,
149 unsigned char *out, size_t *outlen,
150 const unsigned char *in, size_t inlen)
155 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
159 if (ctx->operation != EVP_PKEY_OP_ENCRYPT) {
160 EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
164 if (ctx->op.ciph.ciphprovctx == NULL)
167 ret = ctx->op.ciph.cipher->encrypt(ctx->op.ciph.ciphprovctx, out, outlen,
168 (out == NULL ? 0 : *outlen), in, inlen);
172 if (ctx->pmeth == NULL || ctx->pmeth->encrypt == NULL) {
173 EVPerr(EVP_F_EVP_PKEY_ENCRYPT,
174 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
177 M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_ENCRYPT)
178 return ctx->pmeth->encrypt(ctx, out, outlen, in, inlen);
181 int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx)
183 return evp_pkey_asym_cipher_init(ctx, EVP_PKEY_OP_DECRYPT);
186 int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx,
187 unsigned char *out, size_t *outlen,
188 const unsigned char *in, size_t inlen)
193 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
197 if (ctx->operation != EVP_PKEY_OP_DECRYPT) {
198 EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
202 if (ctx->op.ciph.ciphprovctx == NULL)
205 ret = ctx->op.ciph.cipher->decrypt(ctx->op.ciph.ciphprovctx, out, outlen,
206 (out == NULL ? 0 : *outlen), in, inlen);
210 if (ctx->pmeth == NULL || ctx->pmeth->decrypt == NULL) {
211 EVPerr(EVP_F_EVP_PKEY_DECRYPT,
212 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
215 M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_DECRYPT)
216 return ctx->pmeth->decrypt(ctx, out, outlen, in, inlen);
220 static EVP_ASYM_CIPHER *evp_asym_cipher_new(OSSL_PROVIDER *prov)
222 EVP_ASYM_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_ASYM_CIPHER));
224 if (cipher == NULL) {
225 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
229 cipher->lock = CRYPTO_THREAD_lock_new();
230 if (cipher->lock == NULL) {
231 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
232 OPENSSL_free(cipher);
236 ossl_provider_up_ref(prov);
242 static void *evp_asym_cipher_from_dispatch(int name_id,
243 const OSSL_DISPATCH *fns,
246 EVP_ASYM_CIPHER *cipher = NULL;
247 int ctxfncnt = 0, encfncnt = 0, decfncnt = 0;
248 int gparamfncnt = 0, sparamfncnt = 0;
250 if ((cipher = evp_asym_cipher_new(prov)) == NULL) {
251 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
255 cipher->name_id = name_id;
257 for (; fns->function_id != 0; fns++) {
258 switch (fns->function_id) {
259 case OSSL_FUNC_ASYM_CIPHER_NEWCTX:
260 if (cipher->newctx != NULL)
262 cipher->newctx = OSSL_get_OP_asym_cipher_newctx(fns);
265 case OSSL_FUNC_ASYM_CIPHER_ENCRYPT_INIT:
266 if (cipher->encrypt_init != NULL)
268 cipher->encrypt_init = OSSL_get_OP_asym_cipher_encrypt_init(fns);
271 case OSSL_FUNC_ASYM_CIPHER_ENCRYPT:
272 if (cipher->encrypt != NULL)
274 cipher->encrypt = OSSL_get_OP_asym_cipher_encrypt(fns);
277 case OSSL_FUNC_ASYM_CIPHER_DECRYPT_INIT:
278 if (cipher->decrypt_init != NULL)
280 cipher->decrypt_init = OSSL_get_OP_asym_cipher_decrypt_init(fns);
283 case OSSL_FUNC_ASYM_CIPHER_DECRYPT:
284 if (cipher->decrypt != NULL)
286 cipher->decrypt = OSSL_get_OP_asym_cipher_decrypt(fns);
289 case OSSL_FUNC_ASYM_CIPHER_FREECTX:
290 if (cipher->freectx != NULL)
292 cipher->freectx = OSSL_get_OP_asym_cipher_freectx(fns);
295 case OSSL_FUNC_ASYM_CIPHER_DUPCTX:
296 if (cipher->dupctx != NULL)
298 cipher->dupctx = OSSL_get_OP_asym_cipher_dupctx(fns);
300 case OSSL_FUNC_ASYM_CIPHER_GET_CTX_PARAMS:
301 if (cipher->get_ctx_params != NULL)
303 cipher->get_ctx_params
304 = OSSL_get_OP_asym_cipher_get_ctx_params(fns);
307 case OSSL_FUNC_ASYM_CIPHER_GETTABLE_CTX_PARAMS:
308 if (cipher->gettable_ctx_params != NULL)
310 cipher->gettable_ctx_params
311 = OSSL_get_OP_asym_cipher_gettable_ctx_params(fns);
314 case OSSL_FUNC_ASYM_CIPHER_SET_CTX_PARAMS:
315 if (cipher->set_ctx_params != NULL)
317 cipher->set_ctx_params
318 = OSSL_get_OP_asym_cipher_set_ctx_params(fns);
321 case OSSL_FUNC_ASYM_CIPHER_SETTABLE_CTX_PARAMS:
322 if (cipher->settable_ctx_params != NULL)
324 cipher->settable_ctx_params
325 = OSSL_get_OP_asym_cipher_settable_ctx_params(fns);
331 || (encfncnt != 0 && encfncnt != 2)
332 || (decfncnt != 0 && decfncnt != 2)
333 || (encfncnt != 2 && decfncnt != 2)
334 || (gparamfncnt != 0 && gparamfncnt != 2)
335 || (sparamfncnt != 0 && sparamfncnt != 2)) {
337 * In order to be a consistent set of functions we must have at least
338 * a set of context functions (newctx and freectx) as well as a pair of
339 * "cipher" functions: (encrypt_init, encrypt) or
340 * (decrypt_init decrypt). set_ctx_params and settable_ctx_params are
341 * optional, but if one of them is present then the other one must also
342 * be present. The same applies to get_ctx_params and
343 * gettable_ctx_params. The dupctx function is optional.
345 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
351 EVP_ASYM_CIPHER_free(cipher);
355 void EVP_ASYM_CIPHER_free(EVP_ASYM_CIPHER *cipher)
357 if (cipher != NULL) {
360 CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock);
363 ossl_provider_free(cipher->prov);
364 CRYPTO_THREAD_lock_free(cipher->lock);
365 OPENSSL_free(cipher);
369 int EVP_ASYM_CIPHER_up_ref(EVP_ASYM_CIPHER *cipher)
373 CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock);
377 OSSL_PROVIDER *EVP_ASYM_CIPHER_provider(const EVP_ASYM_CIPHER *cipher)
382 EVP_ASYM_CIPHER *EVP_ASYM_CIPHER_fetch(OPENSSL_CTX *ctx, const char *algorithm,
383 const char *properties)
385 return evp_generic_fetch(ctx, OSSL_OP_ASYM_CIPHER, algorithm, properties,
386 evp_asym_cipher_from_dispatch,
387 (int (*)(void *))EVP_ASYM_CIPHER_up_ref,
388 (void (*)(void *))EVP_ASYM_CIPHER_free);
391 int EVP_ASYM_CIPHER_is_a(const EVP_ASYM_CIPHER *cipher, const char *name)
393 return evp_is_a(cipher->prov, cipher->name_id, NULL, name);
396 int EVP_ASYM_CIPHER_number(const EVP_ASYM_CIPHER *cipher)
398 return cipher->name_id;
401 void EVP_ASYM_CIPHER_do_all_provided(OPENSSL_CTX *libctx,
402 void (*fn)(EVP_ASYM_CIPHER *cipher,
406 evp_generic_do_all(libctx, OSSL_OP_ASYM_CIPHER,
407 (void (*)(void *, void *))fn, arg,
408 evp_asym_cipher_from_dispatch,
409 (void (*)(void *))EVP_ASYM_CIPHER_free);
413 void EVP_ASYM_CIPHER_names_do_all(const EVP_ASYM_CIPHER *cipher,
414 void (*fn)(const char *name, void *data),
417 if (cipher->prov != NULL)
418 evp_names_do_all(cipher->prov, cipher->name_id, fn, data);