2 * Copyright 2019-2020 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 "ciphercommon_local.h"
15 #include "prov/provider_ctx.h"
16 #include "prov/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 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(cipher_generic)
72 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(cipher_generic)
75 * Variable key length cipher functions for OSSL_PARAM settables
78 int cipher_var_keylen_set_ctx_params(void *vctx, const OSSL_PARAM params[])
80 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
83 if (!cipher_generic_set_ctx_params(vctx, params))
85 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN);
89 if (!OSSL_PARAM_get_size_t(p, &keylen)) {
90 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
98 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(cipher_var_keylen)
99 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
100 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(cipher_var_keylen)
103 * AEAD cipher functions for OSSL_PARAM gettables and settables
105 static const OSSL_PARAM cipher_aead_known_gettable_ctx_params[] = {
106 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
107 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
108 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_AEAD_TAGLEN, NULL),
109 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_IV, NULL, 0),
110 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, NULL, 0),
111 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, NULL),
112 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, NULL, 0),
115 const OSSL_PARAM *cipher_aead_gettable_ctx_params(void)
117 return cipher_aead_known_gettable_ctx_params;
120 static const OSSL_PARAM cipher_aead_known_settable_ctx_params[] = {
121 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_AEAD_IVLEN, NULL),
122 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, NULL, 0),
123 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD, NULL, 0),
124 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, NULL, 0),
125 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, NULL, 0),
128 const OSSL_PARAM *cipher_aead_settable_ctx_params(void)
130 return cipher_aead_known_settable_ctx_params;
133 static int cipher_generic_init_internal(PROV_CIPHER_CTX *ctx,
134 const unsigned char *key, size_t keylen,
135 const unsigned char *iv, size_t ivlen,
138 ctx->enc = enc ? 1 : 0;
140 if (iv != NULL && ctx->mode != EVP_CIPH_ECB_MODE) {
141 if (!cipher_generic_initiv(ctx, iv, ivlen))
145 if ((ctx->flags & EVP_CIPH_VARIABLE_LENGTH) == 0) {
146 if (keylen != ctx->keylen) {
147 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEYLEN);
151 ctx->keylen = keylen;
153 return ctx->hw->init(ctx, key, ctx->keylen);
158 int cipher_generic_einit(void *vctx, const unsigned char *key, size_t keylen,
159 const unsigned char *iv, size_t ivlen)
161 return cipher_generic_init_internal((PROV_CIPHER_CTX *)vctx, key, keylen,
165 int cipher_generic_dinit(void *vctx, const unsigned char *key, size_t keylen,
166 const unsigned char *iv, size_t ivlen)
168 return cipher_generic_init_internal((PROV_CIPHER_CTX *)vctx, key, keylen,
172 int cipher_generic_block_update(void *vctx, unsigned char *out, size_t *outl,
173 size_t outsize, const unsigned char *in,
177 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
178 size_t blksz = ctx->blocksize;
182 nextblocks = fillblock(ctx->buf, &ctx->bufsz, blksz, &in, &inl);
184 nextblocks = inl & ~(blksz-1);
187 * If we're decrypting and we end an update on a block boundary we hold
188 * the last block back in case this is the last update call and the last
191 if (ctx->bufsz == blksz && (ctx->enc || inl > 0 || !ctx->pad)) {
192 if (outsize < blksz) {
193 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
196 if (!ctx->hw->cipher(ctx, out, ctx->buf, blksz)) {
197 ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
204 if (nextblocks > 0) {
205 if (!ctx->enc && ctx->pad && nextblocks == inl) {
206 if (!ossl_assert(inl >= blksz)) {
207 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
212 outlint += nextblocks;
213 if (outsize < outlint) {
214 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
218 if (nextblocks > 0) {
219 if (!ctx->hw->cipher(ctx, out, in, nextblocks)) {
220 ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
226 if (inl != 0 && !trailingdata(ctx->buf, &ctx->bufsz, blksz, &in, &inl)) {
227 /* ERR_raise already called */
235 int cipher_generic_block_final(void *vctx, unsigned char *out, size_t *outl,
238 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
239 size_t blksz = ctx->blocksize;
243 padblock(ctx->buf, &ctx->bufsz, blksz);
244 } else if (ctx->bufsz == 0) {
247 } else if (ctx->bufsz != blksz) {
248 ERR_raise(ERR_LIB_PROV, PROV_R_WRONG_FINAL_BLOCK_LENGTH);
252 if (outsize < blksz) {
253 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
256 if (!ctx->hw->cipher(ctx, out, ctx->buf, blksz)) {
257 ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
266 if (ctx->bufsz != blksz) {
267 if (ctx->bufsz == 0 && !ctx->pad) {
271 ERR_raise(ERR_LIB_PROV, PROV_R_WRONG_FINAL_BLOCK_LENGTH);
275 if (!ctx->hw->cipher(ctx, ctx->buf, ctx->buf, blksz)) {
276 ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
280 if (ctx->pad && !unpadblock(ctx->buf, &ctx->bufsz, blksz)) {
281 /* ERR_raise already called */
285 if (outsize < ctx->bufsz) {
286 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
289 memcpy(out, ctx->buf, ctx->bufsz);
295 int cipher_generic_stream_update(void *vctx, unsigned char *out, size_t *outl,
296 size_t outsize, const unsigned char *in,
299 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
307 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
311 if (!ctx->hw->cipher(ctx, out, in, inl)) {
312 ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
319 int cipher_generic_stream_final(void *vctx, unsigned char *out, size_t *outl,
326 int cipher_generic_cipher(void *vctx,
327 unsigned char *out, size_t *outl, size_t outsize,
328 const unsigned char *in, size_t inl)
330 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
333 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
337 if (!ctx->hw->cipher(ctx, out, in, inl)) {
338 ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
346 int cipher_generic_get_ctx_params(void *vctx, OSSL_PARAM params[])
348 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
351 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IVLEN);
352 if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->ivlen)) {
353 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
356 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_PADDING);
357 if (p != NULL && !OSSL_PARAM_set_uint(p, ctx->pad)) {
358 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
361 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IV);
363 && !OSSL_PARAM_set_octet_ptr(p, &ctx->oiv, ctx->ivlen)
364 && !OSSL_PARAM_set_octet_string(p, &ctx->oiv, ctx->ivlen)) {
365 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
368 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_NUM);
369 if (p != NULL && !OSSL_PARAM_set_uint(p, ctx->num)) {
370 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
373 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_KEYLEN);
374 if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->keylen)) {
375 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
381 int cipher_generic_set_ctx_params(void *vctx, const OSSL_PARAM params[])
383 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
386 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_PADDING);
390 if (!OSSL_PARAM_get_uint(p, &pad)) {
391 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
394 ctx->pad = pad ? 1 : 0;
396 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_NUM);
400 if (!OSSL_PARAM_get_uint(p, &num)) {
401 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
409 int cipher_generic_initiv(PROV_CIPHER_CTX *ctx, const unsigned char *iv,
412 if (ivlen != ctx->ivlen
413 || ivlen > sizeof(ctx->iv)) {
414 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IVLEN);
418 memcpy(ctx->iv, iv, ivlen);
419 memcpy(ctx->oiv, iv, ivlen);
423 void cipher_generic_initkey(void *vctx, size_t kbits, size_t blkbits,
424 size_t ivbits, unsigned int mode, uint64_t flags,
425 const PROV_CIPHER_HW *hw, void *provctx)
427 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
431 ctx->keylen = ((kbits) / 8);
432 ctx->ivlen = ((ivbits) / 8);
435 ctx->blocksize = blkbits / 8;
437 ctx->libctx = PROV_LIBRARY_CONTEXT_OF(provctx); /* used for rand */