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openssl/providers/implementations/ciphers/ciphercommon.c
Tomas Mraz 085e3cecbd Move libssl related defines used by fips provider to prov_ssl.h 
This nicely reduces the number of files considered as fips
provider sources.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15609)
2021-06-04 17:06:47 +02:00

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/*
* Copyright 2019-2021 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
*/
/*
* Generic dispatch table functions for ciphers.
*/
/* For SSL3_VERSION */
#include <openssl/prov_ssl.h>
#include <openssl/proverr.h>
#include "ciphercommon_local.h"
#include "prov/provider_ctx.h"
#include "prov/providercommon.h"
/*-
* Generic cipher functions for OSSL_PARAM gettables and settables
*/
static const OSSL_PARAM cipher_known_gettable_params[] = {
OSSL_PARAM_uint(OSSL_CIPHER_PARAM_MODE, NULL),
OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_BLOCK_SIZE, NULL),
OSSL_PARAM_int(OSSL_CIPHER_PARAM_AEAD, NULL),
OSSL_PARAM_int(OSSL_CIPHER_PARAM_CUSTOM_IV, NULL),
OSSL_PARAM_int(OSSL_CIPHER_PARAM_CTS, NULL),
OSSL_PARAM_int(OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK, NULL),
OSSL_PARAM_END
};
const OSSL_PARAM *ossl_cipher_generic_gettable_params(ossl_unused void *provctx)
{
return cipher_known_gettable_params;
}
int ossl_cipher_generic_get_params(OSSL_PARAM params[], unsigned int md,
uint64_t flags,
size_t kbits, size_t blkbits, size_t ivbits)
{
OSSL_PARAM *p;
p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_MODE);
if (p != NULL && !OSSL_PARAM_set_uint(p, md)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
return 0;
}
p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_AEAD);
if (p != NULL
&& !OSSL_PARAM_set_int(p, (flags & PROV_CIPHER_FLAG_AEAD) != 0)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
return 0;
}
p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_CUSTOM_IV);
if (p != NULL
&& !OSSL_PARAM_set_int(p, (flags & PROV_CIPHER_FLAG_CUSTOM_IV) != 0)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
return 0;
}
p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_CTS);
if (p != NULL
&& !OSSL_PARAM_set_int(p, (flags & PROV_CIPHER_FLAG_CTS) != 0)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
return 0;
}
p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK);
if (p != NULL
&& !OSSL_PARAM_set_int(p, (flags & PROV_CIPHER_FLAG_TLS1_MULTIBLOCK) != 0)) {
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, kbits / 8)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
return 0;
}
p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_BLOCK_SIZE);
if (p != NULL && !OSSL_PARAM_set_size_t(p, blkbits / 8)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
return 0;
}
p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IVLEN);
if (p != NULL && !OSSL_PARAM_set_size_t(p, ivbits / 8)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
return 0;
}
return 1;
}
CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(ossl_cipher_generic)
{ OSSL_CIPHER_PARAM_TLS_MAC, OSSL_PARAM_OCTET_PTR, NULL, 0, OSSL_PARAM_UNMODIFIED },
CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(ossl_cipher_generic)
CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(ossl_cipher_generic)
OSSL_PARAM_uint(OSSL_CIPHER_PARAM_USE_BITS, NULL),
OSSL_PARAM_uint(OSSL_CIPHER_PARAM_TLS_VERSION, NULL),
OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_TLS_MAC_SIZE, NULL),
CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(ossl_cipher_generic)
/*
* Variable key length cipher functions for OSSL_PARAM settables
*/
int ossl_cipher_var_keylen_set_ctx_params(void *vctx, const OSSL_PARAM params[])
{
PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
const OSSL_PARAM *p;
if (params == NULL)
return 1;
if (!ossl_cipher_generic_set_ctx_params(vctx, params))
return 0;
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;
}
ctx->keylen = keylen;
}
return 1;
}
CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(ossl_cipher_var_keylen)
OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(ossl_cipher_var_keylen)
/*-
* AEAD cipher functions for OSSL_PARAM gettables and settables
*/
static const OSSL_PARAM cipher_aead_known_gettable_ctx_params[] = {
OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_AEAD_TAGLEN, NULL),
OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_IV, NULL, 0),
OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_UPDATED_IV, NULL, 0),
OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, NULL, 0),
OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, NULL),
OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, NULL, 0),
OSSL_PARAM_END
};
const OSSL_PARAM *ossl_cipher_aead_gettable_ctx_params(
ossl_unused void *cctx, ossl_unused void *provctx
)
{
return cipher_aead_known_gettable_ctx_params;
}
static const OSSL_PARAM cipher_aead_known_settable_ctx_params[] = {
OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_AEAD_IVLEN, NULL),
OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, NULL, 0),
OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD, NULL, 0),
OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, NULL, 0),
OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, NULL, 0),
OSSL_PARAM_END
};
const OSSL_PARAM *ossl_cipher_aead_settable_ctx_params(
ossl_unused void *cctx, ossl_unused void *provctx
)
{
return cipher_aead_known_settable_ctx_params;
}
void ossl_cipher_generic_reset_ctx(PROV_CIPHER_CTX *ctx)
{
if (ctx != NULL && ctx->alloced) {
OPENSSL_free(ctx->tlsmac);
ctx->alloced = 0;
ctx->tlsmac = NULL;
}
}
static int cipher_generic_init_internal(PROV_CIPHER_CTX *ctx,
const unsigned char *key, size_t keylen,
const unsigned char *iv, size_t ivlen,
const OSSL_PARAM params[], int enc)
{
ctx->num = 0;
ctx->bufsz = 0;
ctx->updated = 0;
ctx->enc = enc ? 1 : 0;
if (!ossl_prov_is_running())
return 0;
if (iv != NULL && ctx->mode != EVP_CIPH_ECB_MODE) {
if (!ossl_cipher_generic_initiv(ctx, iv, ivlen))
return 0;
}
if (iv == NULL && ctx->iv_set
&& (ctx->mode == EVP_CIPH_CBC_MODE
|| ctx->mode == EVP_CIPH_CFB_MODE
|| ctx->mode == EVP_CIPH_OFB_MODE))
/* reset IV for these modes to keep compatibility with 1.1.1 */
memcpy(ctx->iv, ctx->oiv, ctx->ivlen);
if (key != NULL) {
if (ctx->variable_keylength == 0) {
if (keylen != ctx->keylen) {
ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
return 0;
}
} else {
ctx->keylen = keylen;
}
if (!ctx->hw->init(ctx, key, ctx->keylen))
return 0;
}
return ossl_cipher_generic_set_ctx_params(ctx, params);
}
int ossl_cipher_generic_einit(void *vctx, const unsigned char *key,
size_t keylen, const unsigned char *iv,
size_t ivlen, const OSSL_PARAM params[])
{
return cipher_generic_init_internal((PROV_CIPHER_CTX *)vctx, key, keylen,
iv, ivlen, params, 1);
}
int ossl_cipher_generic_dinit(void *vctx, const unsigned char *key,
size_t keylen, const unsigned char *iv,
size_t ivlen, const OSSL_PARAM params[])
{
return cipher_generic_init_internal((PROV_CIPHER_CTX *)vctx, key, keylen,
iv, ivlen, params, 0);
}
/* Max padding including padding length byte */
#define MAX_PADDING 256
int ossl_cipher_generic_block_update(void *vctx, unsigned char *out,
size_t *outl, size_t outsize,
const unsigned char *in, size_t inl)
{
size_t outlint = 0;
PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
size_t blksz = ctx->blocksize;
size_t nextblocks;
if (ctx->tlsversion > 0) {
/*
* Each update call corresponds to a TLS record and is individually
* padded
*/
/* Sanity check inputs */
if (in == NULL
|| in != out
|| outsize < inl
|| !ctx->pad) {
ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
return 0;
}
if (ctx->enc) {
unsigned char padval;
size_t padnum, loop;
/* Add padding */
padnum = blksz - (inl % blksz);
if (outsize < inl + padnum) {
ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
return 0;
}
if (padnum > MAX_PADDING) {
ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
return 0;
}
padval = (unsigned char)(padnum - 1);
if (ctx->tlsversion == SSL3_VERSION) {
if (padnum > 1)
memset(out + inl, 0, padnum - 1);
*(out + inl + padnum - 1) = padval;
} else {
/* we need to add 'padnum' padding bytes of value padval */
for (loop = inl; loop < inl + padnum; loop++)
out[loop] = padval;
}
inl += padnum;
}
if ((inl % blksz) != 0) {
ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
return 0;
}
/* Shouldn't normally fail */
if (!ctx->hw->cipher(ctx, out, in, inl)) {
ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
return 0;
}
if (ctx->alloced) {
OPENSSL_free(ctx->tlsmac);
ctx->alloced = 0;
ctx->tlsmac = NULL;
}
/* This only fails if padding is publicly invalid */
*outl = inl;
if (!ctx->enc
&& !ossl_cipher_tlsunpadblock(ctx->libctx, ctx->tlsversion,
out, outl,
blksz, &ctx->tlsmac, &ctx->alloced,
ctx->tlsmacsize, 0)) {
ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
return 0;
}
return 1;
}
if (ctx->bufsz != 0)
nextblocks = ossl_cipher_fillblock(ctx->buf, &ctx->bufsz, blksz,
&in, &inl);
else
nextblocks = inl & ~(blksz-1);
/*
* If we're decrypting and we end an update on a block boundary we hold
* the last block back in case this is the last update call and the last
* block is padded.
*/
if (ctx->bufsz == blksz && (ctx->enc || inl > 0 || !ctx->pad)) {
if (outsize < blksz) {
ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
return 0;
}
if (!ctx->hw->cipher(ctx, out, ctx->buf, blksz)) {
ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
return 0;
}
ctx->bufsz = 0;
outlint = blksz;
out += blksz;
}
if (nextblocks > 0) {
if (!ctx->enc && ctx->pad && nextblocks == inl) {
if (!ossl_assert(inl >= blksz)) {
ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
return 0;
}
nextblocks -= blksz;
}
outlint += nextblocks;
if (outsize < outlint) {
ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
return 0;
}
}
if (nextblocks > 0) {
if (!ctx->hw->cipher(ctx, out, in, nextblocks)) {
ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
return 0;
}
in += nextblocks;
inl -= nextblocks;
}
if (inl != 0
&& !ossl_cipher_trailingdata(ctx->buf, &ctx->bufsz, blksz, &in, &inl)) {
/* ERR_raise already called */
return 0;
}
*outl = outlint;
return inl == 0;
}
int ossl_cipher_generic_block_final(void *vctx, unsigned char *out,
size_t *outl, size_t outsize)
{
PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
size_t blksz = ctx->blocksize;
if (!ossl_prov_is_running())
return 0;
if (ctx->tlsversion > 0) {
/* We never finalize TLS, so this is an error */
ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
return 0;
}
if (ctx->enc) {
if (ctx->pad) {
ossl_cipher_padblock(ctx->buf, &ctx->bufsz, blksz);
} else if (ctx->bufsz == 0) {
*outl = 0;
return 1;
} else if (ctx->bufsz != blksz) {
ERR_raise(ERR_LIB_PROV, PROV_R_WRONG_FINAL_BLOCK_LENGTH);
return 0;
}
if (outsize < blksz) {
ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
return 0;
}
if (!ctx->hw->cipher(ctx, out, ctx->buf, blksz)) {
ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
return 0;
}
ctx->bufsz = 0;
*outl = blksz;
return 1;
}
/* Decrypting */
if (ctx->bufsz != blksz) {
if (ctx->bufsz == 0 && !ctx->pad) {
*outl = 0;
return 1;
}
ERR_raise(ERR_LIB_PROV, PROV_R_WRONG_FINAL_BLOCK_LENGTH);
return 0;
}
if (!ctx->hw->cipher(ctx, ctx->buf, ctx->buf, blksz)) {
ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
return 0;
}
if (ctx->pad && !ossl_cipher_unpadblock(ctx->buf, &ctx->bufsz, blksz)) {
/* ERR_raise already called */
return 0;
}
if (outsize < ctx->bufsz) {
ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
return 0;
}
memcpy(out, ctx->buf, ctx->bufsz);
*outl = ctx->bufsz;
ctx->bufsz = 0;
return 1;
}
int ossl_cipher_generic_stream_update(void *vctx, unsigned char *out,
size_t *outl, size_t outsize,
const unsigned char *in, size_t inl)
{
PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
if (inl == 0) {
*outl = 0;
return 1;
}
if (outsize < inl) {
ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
return 0;
}
if (!ctx->hw->cipher(ctx, out, in, inl)) {
ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
return 0;
}
*outl = inl;
if (!ctx->enc && ctx->tlsversion > 0) {
/*
* Remove any TLS padding. Only used by cipher_aes_cbc_hmac_sha1_hw.c and
* cipher_aes_cbc_hmac_sha256_hw.c
*/
if (ctx->removetlspad) {
/*
* We should have already failed in the cipher() call above if this
* isn't true.
*/
if (!ossl_assert(*outl >= (size_t)(out[inl - 1] + 1)))
return 0;
/* The actual padding length */
*outl -= out[inl - 1] + 1;
}
/* TLS MAC and explicit IV if relevant. We should have already failed
* in the cipher() call above if *outl is too short.
*/
if (!ossl_assert(*outl >= ctx->removetlsfixed))
return 0;
*outl -= ctx->removetlsfixed;
/* Extract the MAC if there is one */
if (ctx->tlsmacsize > 0) {
if (*outl < ctx->tlsmacsize)
return 0;
ctx->tlsmac = out + *outl - ctx->tlsmacsize;
*outl -= ctx->tlsmacsize;
}
}
return 1;
}
int ossl_cipher_generic_stream_final(void *vctx, unsigned char *out,
size_t *outl, size_t outsize)
{
if (!ossl_prov_is_running())
return 0;
*outl = 0;
return 1;
}
int ossl_cipher_generic_cipher(void *vctx, unsigned char *out, size_t *outl,
size_t outsize, const unsigned char *in,
size_t inl)
{
PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
if (!ossl_prov_is_running())
return 0;
if (outsize < inl) {
ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
return 0;
}
if (!ctx->hw->cipher(ctx, out, in, inl)) {
ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
return 0;
}
*outl = inl;
return 1;
}
int ossl_cipher_generic_get_ctx_params(void *vctx, OSSL_PARAM params[])
{
PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
OSSL_PARAM *p;
p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IVLEN);
if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->ivlen)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
return 0;
}
p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_PADDING);
if (p != NULL && !OSSL_PARAM_set_uint(p, ctx->pad)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
return 0;
}
p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IV);
if (p != NULL
&& !OSSL_PARAM_set_octet_ptr(p, &ctx->oiv, ctx->ivlen)
&& !OSSL_PARAM_set_octet_string(p, &ctx->oiv, ctx->ivlen)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
return 0;
}
p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_UPDATED_IV);
if (p != NULL
&& !OSSL_PARAM_set_octet_ptr(p, &ctx->iv, ctx->ivlen)
&& !OSSL_PARAM_set_octet_string(p, &ctx->iv, ctx->ivlen)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
return 0;
}
p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_NUM);
if (p != NULL && !OSSL_PARAM_set_uint(p, ctx->num)) {
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;
}
p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_TLS_MAC);
if (p != NULL
&& !OSSL_PARAM_set_octet_ptr(p, ctx->tlsmac, ctx->tlsmacsize)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
return 0;
}
return 1;
}
int ossl_cipher_generic_set_ctx_params(void *vctx, const OSSL_PARAM params[])
{
PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
const OSSL_PARAM *p;
if (params == NULL)
return 1;
p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_PADDING);
if (p != NULL) {
unsigned int pad;
if (!OSSL_PARAM_get_uint(p, &pad)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
return 0;
}
ctx->pad = pad ? 1 : 0;
}
p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_USE_BITS);
if (p != NULL) {
unsigned int bits;
if (!OSSL_PARAM_get_uint(p, &bits)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
return 0;
}
ctx->use_bits = bits ? 1 : 0;
}
p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_TLS_VERSION);
if (p != NULL) {
if (!OSSL_PARAM_get_uint(p, &ctx->tlsversion)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
return 0;
}
}
p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_TLS_MAC_SIZE);
if (p != NULL) {
if (!OSSL_PARAM_get_size_t(p, &ctx->tlsmacsize)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
return 0;
}
}
p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_NUM);
if (p != NULL) {
unsigned int num;
if (!OSSL_PARAM_get_uint(p, &num)) {
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
return 0;
}
ctx->num = num;
}
return 1;
}
int ossl_cipher_generic_initiv(PROV_CIPHER_CTX *ctx, const unsigned char *iv,
size_t ivlen)
{
if (ivlen != ctx->ivlen
|| ivlen > sizeof(ctx->iv)) {
ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IV_LENGTH);
return 0;
}
ctx->iv_set = 1;
memcpy(ctx->iv, iv, ivlen);
memcpy(ctx->oiv, iv, ivlen);
return 1;
}
void ossl_cipher_generic_initkey(void *vctx, size_t kbits, size_t blkbits,
size_t ivbits, unsigned int mode,
uint64_t flags, const PROV_CIPHER_HW *hw,
void *provctx)
{
PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
if ((flags & PROV_CIPHER_FLAG_INVERSE_CIPHER) != 0)
ctx->inverse_cipher = 1;
if ((flags & PROV_CIPHER_FLAG_VARIABLE_LENGTH) != 0)
ctx->variable_keylength = 1;
ctx->pad = 1;
ctx->keylen = ((kbits) / 8);
ctx->ivlen = ((ivbits) / 8);
ctx->hw = hw;
ctx->mode = mode;
ctx->blocksize = blkbits / 8;
if (provctx != NULL)
ctx->libctx = PROV_LIBCTX_OF(provctx); /* used for rand */
}
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