2 * Copyright 2019 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
11 * Generic dispatch table functions for ciphers.
14 #include "cipher_locl.h"
15 #include "internal/provider_ctx.h"
16 #include "internal/providercommonerr.h"
19 * Generic cipher functions for OSSL_PARAM gettables and settables
21 static const OSSL_PARAM cipher_known_gettable_params[] = {
22 OSSL_PARAM_uint(OSSL_CIPHER_PARAM_MODE, NULL),
23 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
24 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
25 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_BLOCK_SIZE, NULL),
26 OSSL_PARAM_ulong(OSSL_CIPHER_PARAM_FLAGS, NULL),
29 const OSSL_PARAM *cipher_generic_gettable_params(void)
31 return cipher_known_gettable_params;
34 int cipher_generic_get_params(OSSL_PARAM params[], unsigned int md,
36 size_t kbits, size_t blkbits, size_t ivbits)
40 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_MODE);
41 if (p != NULL && !OSSL_PARAM_set_uint(p, md)) {
42 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
45 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_FLAGS);
46 if (p != NULL && !OSSL_PARAM_set_ulong(p, flags)) {
47 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
50 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_KEYLEN);
51 if (p != NULL && !OSSL_PARAM_set_size_t(p, kbits / 8)) {
52 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
55 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_BLOCK_SIZE);
56 if (p != NULL && !OSSL_PARAM_set_size_t(p, blkbits / 8)) {
57 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
60 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IVLEN);
61 if (p != NULL && !OSSL_PARAM_set_size_t(p, ivbits / 8)) {
62 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
68 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(cipher_generic)
69 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(cipher_generic)
71 static const OSSL_PARAM cipher_known_settable_ctx_params[] = {
72 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
73 OSSL_PARAM_uint(OSSL_CIPHER_PARAM_PADDING, NULL),
74 OSSL_PARAM_uint(OSSL_CIPHER_PARAM_NUM, NULL),
77 const OSSL_PARAM *cipher_generic_settable_ctx_params(void)
79 return cipher_known_settable_ctx_params;
83 * AEAD cipher functions for OSSL_PARAM gettables and settables
85 static const OSSL_PARAM cipher_aead_known_gettable_ctx_params[] = {
86 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
87 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
88 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_AEAD_TAGLEN, NULL),
89 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_IV, NULL, 0),
90 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, NULL, 0),
91 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, NULL),
94 const OSSL_PARAM *cipher_aead_gettable_ctx_params(void)
96 return cipher_aead_known_gettable_ctx_params;
99 static const OSSL_PARAM cipher_aead_known_settable_ctx_params[] = {
100 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
101 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_AEAD_IVLEN, NULL),
102 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, NULL, 0),
103 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD, NULL, 0),
104 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, NULL, 0),
107 const OSSL_PARAM *cipher_aead_settable_ctx_params(void)
109 return cipher_aead_known_settable_ctx_params;
112 static int cipher_generic_init_internal(PROV_CIPHER_CTX *ctx,
113 const unsigned char *key, size_t keylen,
114 const unsigned char *iv, size_t ivlen,
117 ctx->enc = enc ? 1 : 0;
119 if (iv != NULL && ctx->mode != EVP_CIPH_ECB_MODE) {
120 if (ivlen != ctx->ivlen) {
121 ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
124 memcpy(ctx->iv, iv, ctx->ivlen);
127 if ((ctx->flags & EVP_CIPH_VARIABLE_LENGTH) == 0) {
128 if (keylen != ctx->keylen) {
129 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEYLEN);
133 ctx->keylen = keylen;
135 return ctx->hw->init(ctx, key, ctx->keylen);
140 int cipher_generic_einit(void *vctx, const unsigned char *key, size_t keylen,
141 const unsigned char *iv, size_t ivlen)
143 return cipher_generic_init_internal((PROV_CIPHER_CTX *)vctx, key, keylen,
147 int cipher_generic_dinit(void *vctx, const unsigned char *key, size_t keylen,
148 const unsigned char *iv, size_t ivlen)
150 return cipher_generic_init_internal((PROV_CIPHER_CTX *)vctx, key, keylen,
154 int cipher_generic_block_update(void *vctx, unsigned char *out, size_t *outl,
155 size_t outsize, const unsigned char *in,
159 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
160 size_t blksz = ctx->blocksize;
161 size_t nextblocks = fillblock(ctx->buf, &ctx->bufsz, blksz, &in, &inl);
164 * If we're decrypting and we end an update on a block boundary we hold
165 * the last block back in case this is the last update call and the last
168 if (ctx->bufsz == blksz && (ctx->enc || inl > 0 || !ctx->pad)) {
169 if (outsize < blksz) {
170 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
173 if (!ctx->hw->cipher(ctx, out, ctx->buf, blksz)) {
174 ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
181 if (nextblocks > 0) {
182 if (!ctx->enc && ctx->pad && nextblocks == inl) {
183 if (!ossl_assert(inl >= blksz)) {
184 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
189 outlint += nextblocks;
190 if (outsize < outlint) {
191 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
194 if (!ctx->hw->cipher(ctx, out, in, nextblocks)) {
195 ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
201 if (!trailingdata(ctx->buf, &ctx->bufsz, blksz, &in, &inl)) {
202 /* ERR_raise already called */
210 int cipher_generic_block_final(void *vctx, unsigned char *out, size_t *outl,
213 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
214 size_t blksz = ctx->blocksize;
218 padblock(ctx->buf, &ctx->bufsz, blksz);
219 } else if (ctx->bufsz == 0) {
222 } else if (ctx->bufsz != blksz) {
223 ERR_raise(ERR_LIB_PROV, PROV_R_WRONG_FINAL_BLOCK_LENGTH);
227 if (outsize < blksz) {
228 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
231 if (!ctx->hw->cipher(ctx, out, ctx->buf, blksz)) {
232 ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
241 if (ctx->bufsz != blksz) {
242 if (ctx->bufsz == 0 && !ctx->pad) {
246 ERR_raise(ERR_LIB_PROV, PROV_R_WRONG_FINAL_BLOCK_LENGTH);
250 if (!ctx->hw->cipher(ctx, ctx->buf, ctx->buf, blksz)) {
251 ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
255 if (ctx->pad && !unpadblock(ctx->buf, &ctx->bufsz, blksz)) {
256 /* ERR_raise already called */
260 if (outsize < ctx->bufsz) {
261 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
264 memcpy(out, ctx->buf, ctx->bufsz);
270 int cipher_generic_stream_update(void *vctx, unsigned char *out, size_t *outl,
271 size_t outsize, const unsigned char *in,
274 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
277 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
281 if (!ctx->hw->cipher(ctx, out, in, inl)) {
282 ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
289 int cipher_generic_stream_final(void *vctx, unsigned char *out, size_t *outl,
296 int cipher_generic_cipher(void *vctx,
297 unsigned char *out, size_t *outl, size_t outsize,
298 const unsigned char *in, size_t inl)
300 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
303 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
307 if (!ctx->hw->cipher(ctx, out, in, inl)) {
308 ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
316 int cipher_generic_get_ctx_params(void *vctx, OSSL_PARAM params[])
318 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
321 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IVLEN);
322 if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->ivlen)) {
323 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
326 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_PADDING);
327 if (p != NULL && !OSSL_PARAM_set_uint(p, ctx->pad)) {
328 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
331 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IV);
333 && !OSSL_PARAM_set_octet_ptr(p, &ctx->iv, ctx->ivlen)
334 && !OSSL_PARAM_set_octet_string(p, &ctx->iv, ctx->ivlen)) {
335 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
338 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_NUM);
339 if (p != NULL && !OSSL_PARAM_set_uint(p, ctx->num)) {
340 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
343 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_KEYLEN);
344 if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->keylen)) {
345 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
352 int cipher_generic_set_ctx_params(void *vctx, const OSSL_PARAM params[])
354 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
357 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_PADDING);
361 if (!OSSL_PARAM_get_uint(p, &pad)) {
362 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
365 ctx->pad = pad ? 1 : 0;
367 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_NUM);
371 if (!OSSL_PARAM_get_uint(p, &num)) {
372 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
377 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN);
381 if (!OSSL_PARAM_get_size_t(p, &keylen)) {
382 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
385 ctx->keylen = keylen;
390 void cipher_generic_initkey(void *vctx, size_t kbits, size_t blkbits,
391 size_t ivbits, unsigned int mode, uint64_t flags,
392 const PROV_CIPHER_HW *hw, void *provctx)
394 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
398 ctx->keylen = ((kbits) / 8);
399 ctx->ivlen = ((ivbits) / 8);
402 ctx->blocksize = blkbits / 8;
404 ctx->libctx = PROV_LIBRARY_CONTEXT_OF(provctx); /* used for rand */