/src/openssl/providers/implementations/ciphers/ciphercommon.c

Source
/*
 * Copyright 2019-2025 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 <string.h>
#include <openssl/prov_ssl.h>
#include <openssl/proverr.h>
#include "ciphercommon_local.h"
#include "prov/provider_ctx.h"
#include "prov/providercommon.h"
#include "internal/skey.h"
#include "internal/e_os.h"
#include "crypto/types.h"

#define cipher_generic_get_ctx_params_st ossl_cipher_get_ctx_param_list_st
#define cipher_generic_set_ctx_params_st ossl_cipher_set_ctx_param_list_st
#define cipher_var_keylen_set_ctx_params_st ossl_cipher_set_ctx_param_list_st

#include "providers/implementations/ciphers/ciphercommon.inc"

/*-
 * Generic cipher functions for OSSL_PARAM gettables and settables
 */

const OSSL_PARAM *ossl_cipher_generic_gettable_params(ossl_unused void *provctx)
{
    return ossl_cipher_generic_get_params_list;
}

int ossl_cipher_generic_get_params(OSSL_PARAM params[], unsigned int md,
    uint64_t flags,
    size_t kbits, size_t blkbits, size_t ivbits)
{
    struct ossl_cipher_generic_get_params_st p;

    if (!ossl_cipher_generic_get_params_decoder(params, &p))
        return 0;

    if (p.mode != NULL && !OSSL_PARAM_set_uint(p.mode, md)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }
    if (p.aead != NULL
        && !OSSL_PARAM_set_int(p.aead, (flags & PROV_CIPHER_FLAG_AEAD) != 0)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }
    if (p.custiv != NULL
        && !OSSL_PARAM_set_int(p.custiv, (flags & PROV_CIPHER_FLAG_CUSTOM_IV) != 0)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }
    if (p.cts != NULL
        && !OSSL_PARAM_set_int(p.cts, (flags & PROV_CIPHER_FLAG_CTS) != 0)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }
    if (p.mb != NULL
        && !OSSL_PARAM_set_int(p.mb, (flags & PROV_CIPHER_FLAG_TLS1_MULTIBLOCK) != 0)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }
    if (p.rand != NULL
        && !OSSL_PARAM_set_int(p.rand, (flags & PROV_CIPHER_FLAG_RAND_KEY) != 0)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }
    if (p.etm != NULL
        && !OSSL_PARAM_set_int(p.etm, (flags & EVP_CIPH_FLAG_ENC_THEN_MAC) != 0)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }
    if (p.keylen != NULL && !OSSL_PARAM_set_size_t(p.keylen, kbits / 8)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }
    if (p.bsize != NULL && !OSSL_PARAM_set_size_t(p.bsize, blkbits / 8)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }
    if (p.ivlen != NULL && !OSSL_PARAM_set_size_t(p.ivlen, ivbits / 8)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }
    return 1;
}

const OSSL_PARAM *ossl_cipher_generic_gettable_ctx_params(ossl_unused void *cctx, ossl_unused void *provctx)
{
    return cipher_generic_get_ctx_params_list;
}

const OSSL_PARAM *ossl_cipher_generic_settable_ctx_params(ossl_unused void *cctx, ossl_unused void *provctx)
{
    return cipher_generic_set_ctx_params_list;
}

/*
 * Variable key length cipher functions for OSSL_PARAM settables
 */

const OSSL_PARAM *ossl_cipher_var_keylen_settable_ctx_params(ossl_unused void *cctx, ossl_unused void *provctx)
{
    return cipher_var_keylen_set_ctx_params_list;
}

int ossl_cipher_var_keylen_set_ctx_params(void *vctx, const OSSL_PARAM params[])
{
    PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
    struct ossl_cipher_set_ctx_param_list_st p;

    if (ctx == NULL
        || !cipher_var_keylen_set_ctx_params_decoder(params, &p)
        || !ossl_cipher_common_set_ctx_params(ctx, &p))
        return 0;

    if (p.keylen != NULL) {
        size_t keylen;

        if (!OSSL_PARAM_get_size_t(p.keylen, &keylen)) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
            return 0;
        }
        if (ctx->keylen != keylen) {
            ctx->keylen = keylen;
            ctx->key_set = 0;
        }
    }
    return 1;
}

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;
        ctx->key_set = 1;
    }
    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);
}

int ossl_cipher_generic_skey_einit(void *vctx, void *skeydata,
    const unsigned char *iv, size_t ivlen,
    const OSSL_PARAM params[])
{
    PROV_SKEY *key = skeydata;

    return cipher_generic_init_internal((PROV_CIPHER_CTX *)vctx,
        key->data, key->length,
        iv, ivlen, params, 1);
}

int ossl_cipher_generic_skey_dinit(void *vctx, void *skeydata,
    const unsigned char *iv, size_t ivlen,
    const OSSL_PARAM params[])
{
    PROV_SKEY *key = skeydata;

    return cipher_generic_init_internal((PROV_CIPHER_CTX *)vctx,
        key->data, key->length,
        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->key_set) {
        ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET);
        return 0;
    }

    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);
            /* 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->key_set) {
        ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET);
        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 (!ctx->key_set) {
        ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET);
        return 0;
    }

    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)
{
    PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;

    if (!ossl_prov_is_running())
        return 0;

    if (!ctx->key_set) {
        ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET);
        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 (!ctx->key_set) {
        ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET);
        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_common_get_ctx_params(PROV_CIPHER_CTX *ctx, const struct ossl_cipher_get_ctx_param_list_st *p)
{
    if (p->ivlen != NULL && !OSSL_PARAM_set_size_t(p->ivlen, ctx->ivlen)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }

    if (p->pad != NULL && !OSSL_PARAM_set_uint(p->pad, ctx->pad)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }

    if (p->iv != NULL
        && !OSSL_PARAM_set_octet_string_or_ptr(p->iv, ctx->oiv, ctx->ivlen)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }

    if (p->updiv != NULL
        && !OSSL_PARAM_set_octet_string_or_ptr(p->updiv, ctx->iv, ctx->ivlen)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }

    if (p->num != NULL && !OSSL_PARAM_set_uint(p->num, ctx->num)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }

    if (p->keylen != NULL && !OSSL_PARAM_set_size_t(p->keylen, ctx->keylen)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }

    if (p->tlsmac != NULL
        && !OSSL_PARAM_set_octet_ptr(p->tlsmac, ctx->tlsmac, ctx->tlsmacsize)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }
    return 1;
}

int ossl_cipher_generic_get_ctx_params(void *vctx, OSSL_PARAM params[])
{
    PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
    struct ossl_cipher_get_ctx_param_list_st p;

    if (ctx == NULL || !cipher_generic_get_ctx_params_decoder(params, &p))
        return 0;
    return ossl_cipher_common_get_ctx_params(ctx, &p);
}

int ossl_cipher_common_set_ctx_params(PROV_CIPHER_CTX *ctx, const struct ossl_cipher_set_ctx_param_list_st *p)
{
    if (p->pad != NULL) {
        unsigned int pad;

        if (!OSSL_PARAM_get_uint(p->pad, &pad)) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
            return 0;
        }
        ctx->pad = pad ? 1 : 0;
    }

    if (p->bits != NULL) {
        unsigned int bits;

        if (!OSSL_PARAM_get_uint(p->bits, &bits)) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
            return 0;
        }
        ctx->use_bits = bits ? 1 : 0;
    }

    if (p->tlsvers != NULL) {
        if (!OSSL_PARAM_get_uint(p->tlsvers, &ctx->tlsversion)) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
            return 0;
        }
    }

    if (p->tlsmacsize != NULL) {
        if (!OSSL_PARAM_get_size_t(p->tlsmacsize, &ctx->tlsmacsize)) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
            return 0;
        }
    }

    if (p->num != NULL) {
        unsigned int num;

        if (!OSSL_PARAM_get_uint(p->num, &num)) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
            return 0;
        }
        if (ctx->blocksize > 0 && num >= (unsigned int)ctx->blocksize) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
            return 0;
        }
        ctx->num = num;
    }
    return 1;
}

int ossl_cipher_generic_set_ctx_params(void *vctx, const OSSL_PARAM params[])
{
    PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
    struct ossl_cipher_set_ctx_param_list_st p;

    if (ossl_param_is_empty(params))
        return 1;

    if (ctx == NULL || !cipher_generic_set_ctx_params_decoder(params, &p))
        return 0;
    return ossl_cipher_common_set_ctx_params(ctx, &p);
}

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 */
}

Coverage Report

Created: 2026-07-16 06:59

Line	Count	Source
1		/*
2		* Copyright 2019-2025 The OpenSSL Project Authors. All Rights Reserved.
3		*
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
8		*/
9
10		/*
11		* Generic dispatch table functions for ciphers.
12		*/
13
14		/* For SSL3_VERSION */
15		#include <string.h>
16		#include <openssl/prov_ssl.h>
17		#include <openssl/proverr.h>
18		#include "ciphercommon_local.h"
19		#include "prov/provider_ctx.h"
20		#include "prov/providercommon.h"
21		#include "internal/skey.h"
22		#include "internal/e_os.h"
23		#include "crypto/types.h"
24
25		#define cipher_generic_get_ctx_params_st ossl_cipher_get_ctx_param_list_st
26		#define cipher_generic_set_ctx_params_st ossl_cipher_set_ctx_param_list_st
27		#define cipher_var_keylen_set_ctx_params_st ossl_cipher_set_ctx_param_list_st
28
29		#include "providers/implementations/ciphers/ciphercommon.inc"
30
31		/*-
32		* Generic cipher functions for OSSL_PARAM gettables and settables
33		*/
34
35		const OSSL_PARAM ossl_cipher_generic_gettable_params(ossl_unused void provctx)
36	0	{
37	0	return ossl_cipher_generic_get_params_list;
38	0	}
39
40		int ossl_cipher_generic_get_params(OSSL_PARAM params[], unsigned int md,
41		uint64_t flags,
42		size_t kbits, size_t blkbits, size_t ivbits)
43	158	{
44	158	struct ossl_cipher_generic_get_params_st p;
45
46	158	if (!ossl_cipher_generic_get_params_decoder(params, &p))
47	0	return 0;
48
49	158	if (p.mode != NULL && !OSSL_PARAM_set_uint(p.mode, md)) {
50	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
51	0	return 0;
52	0	}
53	158	if (p.aead != NULL
54	158	&& !OSSL_PARAM_set_int(p.aead, (flags & PROV_CIPHER_FLAG_AEAD) != 0)) {
55	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
56	0	return 0;
57	0	}
58	158	if (p.custiv != NULL
59	158	&& !OSSL_PARAM_set_int(p.custiv, (flags & PROV_CIPHER_FLAG_CUSTOM_IV) != 0)) {
60	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
61	0	return 0;
62	0	}
63	158	if (p.cts != NULL
64	158	&& !OSSL_PARAM_set_int(p.cts, (flags & PROV_CIPHER_FLAG_CTS) != 0)) {
65	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
66	0	return 0;
67	0	}
68	158	if (p.mb != NULL
69	158	&& !OSSL_PARAM_set_int(p.mb, (flags & PROV_CIPHER_FLAG_TLS1_MULTIBLOCK) != 0)) {
70	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
71	0	return 0;
72	0	}
73	158	if (p.rand != NULL
74	158	&& !OSSL_PARAM_set_int(p.rand, (flags & PROV_CIPHER_FLAG_RAND_KEY) != 0)) {
75	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
76	0	return 0;
77	0	}
78	158	if (p.etm != NULL
79	158	&& !OSSL_PARAM_set_int(p.etm, (flags & EVP_CIPH_FLAG_ENC_THEN_MAC) != 0)) {
80	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
81	0	return 0;
82	0	}
83	158	if (p.keylen != NULL && !OSSL_PARAM_set_size_t(p.keylen, kbits / 8)) {
84	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
85	0	return 0;
86	0	}
87	158	if (p.bsize != NULL && !OSSL_PARAM_set_size_t(p.bsize, blkbits / 8)) {
88	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
89	0	return 0;
90	0	}
91	158	if (p.ivlen != NULL && !OSSL_PARAM_set_size_t(p.ivlen, ivbits / 8)) {
92	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
93	0	return 0;
94	0	}
95	158	return 1;
96	158	}
97
98		const OSSL_PARAM ossl_cipher_generic_gettable_ctx_params(ossl_unused void cctx, ossl_unused void *provctx)
99	101	{
100	101	return cipher_generic_get_ctx_params_list;
101	101	}
102
103		const OSSL_PARAM ossl_cipher_generic_settable_ctx_params(ossl_unused void cctx, ossl_unused void *provctx)
104	0	{
105	0	return cipher_generic_set_ctx_params_list;
106	0	}
107
108		/*
109		* Variable key length cipher functions for OSSL_PARAM settables
110		*/
111
112		const OSSL_PARAM ossl_cipher_var_keylen_settable_ctx_params(ossl_unused void cctx, ossl_unused void *provctx)
113	0	{
114	0	return cipher_var_keylen_set_ctx_params_list;
115	0	}
116
117		int ossl_cipher_var_keylen_set_ctx_params(void *vctx, const OSSL_PARAM params[])
118	0	{
119	0	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
120	0	struct ossl_cipher_set_ctx_param_list_st p;
121
122	0	if (ctx == NULL
123	0	\|\| !cipher_var_keylen_set_ctx_params_decoder(params, &p)
124	0	\|\| !ossl_cipher_common_set_ctx_params(ctx, &p))
125	0	return 0;
126
127	0	if (p.keylen != NULL) {
128	0	size_t keylen;
129
130	0	if (!OSSL_PARAM_get_size_t(p.keylen, &keylen)) {
131	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
132	0	return 0;
133	0	}
134	0	if (ctx->keylen != keylen) {
135	0	ctx->keylen = keylen;
136	0	ctx->key_set = 0;
137	0	}
138	0	}
139	0	return 1;
140	0	}
141
142		void ossl_cipher_generic_reset_ctx(PROV_CIPHER_CTX *ctx)
143	473	{
144	473	if (ctx != NULL && ctx->alloced) {
145	0	OPENSSL_free(ctx->tlsmac);
146	0	ctx->alloced = 0;
147	0	ctx->tlsmac = NULL;
148	0	}
149	473	}
150
151		static int cipher_generic_init_internal(PROV_CIPHER_CTX *ctx,
152		const unsigned char *key, size_t keylen,
153		const unsigned char *iv, size_t ivlen,
154		const OSSL_PARAM params[], int enc)
155	0	{
156	0	ctx->num = 0;
157	0	ctx->bufsz = 0;
158	0	ctx->updated = 0;
159	0	ctx->enc = enc ? 1 : 0;
160
161	0	if (!ossl_prov_is_running())
162	0	return 0;
163
164	0	if (iv != NULL && ctx->mode != EVP_CIPH_ECB_MODE) {
165	0	if (!ossl_cipher_generic_initiv(ctx, iv, ivlen))
166	0	return 0;
167	0	}
168	0	if (iv == NULL && ctx->iv_set
169	0	&& (ctx->mode == EVP_CIPH_CBC_MODE
170	0	\|\| ctx->mode == EVP_CIPH_CFB_MODE
171	0	\|\| ctx->mode == EVP_CIPH_OFB_MODE))
172		/* reset IV for these modes to keep compatibility with 1.1.1 */
173	0	memcpy(ctx->iv, ctx->oiv, ctx->ivlen);
174
175	0	if (key != NULL) {
176	0	if (ctx->variable_keylength == 0) {
177	0	if (keylen != ctx->keylen) {
178	0	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
179	0	return 0;
180	0	}
181	0	} else {
182	0	ctx->keylen = keylen;
183	0	}
184	0	if (!ctx->hw->init(ctx, key, ctx->keylen))
185	0	return 0;
186	0	ctx->key_set = 1;
187	0	}
188	0	return ossl_cipher_generic_set_ctx_params(ctx, params);
189	0	}
190
191		int ossl_cipher_generic_einit(void vctx, const unsigned char key,
192		size_t keylen, const unsigned char *iv,
193		size_t ivlen, const OSSL_PARAM params[])
194	0	{
195	0	return cipher_generic_init_internal((PROV_CIPHER_CTX *)vctx, key, keylen,
196	0	iv, ivlen, params, 1);
197	0	}
198
199		int ossl_cipher_generic_dinit(void vctx, const unsigned char key,
200		size_t keylen, const unsigned char *iv,
201		size_t ivlen, const OSSL_PARAM params[])
202	0	{
203	0	return cipher_generic_init_internal((PROV_CIPHER_CTX *)vctx, key, keylen,
204	0	iv, ivlen, params, 0);
205	0	}
206
207		int ossl_cipher_generic_skey_einit(void vctx, void skeydata,
208		const unsigned char *iv, size_t ivlen,
209		const OSSL_PARAM params[])
210	0	{
211	0	PROV_SKEY *key = skeydata;
212
213	0	return cipher_generic_init_internal((PROV_CIPHER_CTX *)vctx,
214	0	key->data, key->length,
215	0	iv, ivlen, params, 1);
216	0	}
217
218		int ossl_cipher_generic_skey_dinit(void vctx, void skeydata,
219		const unsigned char *iv, size_t ivlen,
220		const OSSL_PARAM params[])
221	0	{
222	0	PROV_SKEY *key = skeydata;
223
224	0	return cipher_generic_init_internal((PROV_CIPHER_CTX *)vctx,
225	0	key->data, key->length,
226	0	iv, ivlen, params, 0);
227	0	}
228
229		/* Max padding including padding length byte */
230	0	#define MAX_PADDING 256
231
232		int ossl_cipher_generic_block_update(void vctx, unsigned char out,
233		size_t *outl, size_t outsize,
234		const unsigned char *in, size_t inl)
235	0	{
236	0	size_t outlint = 0;
237	0	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
238	0	size_t blksz = ctx->blocksize;
239	0	size_t nextblocks;
240
241	0	if (!ctx->key_set) {
242	0	ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET);
243	0	return 0;
244	0	}
245
246	0	if (ctx->tlsversion > 0) {
247		/*
248		* Each update call corresponds to a TLS record and is individually
249		* padded
250		*/
251
252		/* Sanity check inputs */
253	0	if (in == NULL
254	0	\|\| in != out
255	0	\|\| outsize < inl
256	0	\|\| !ctx->pad) {
257	0	ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
258	0	return 0;
259	0	}
260
261	0	if (ctx->enc) {
262	0	unsigned char padval;
263	0	size_t padnum, loop;
264
265		/* Add padding */
266
267	0	padnum = blksz - (inl % blksz);
268
269	0	if (outsize < inl + padnum) {
270	0	ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
271	0	return 0;
272	0	}
273
274	0	if (padnum > MAX_PADDING) {
275	0	ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
276	0	return 0;
277	0	}
278	0	padval = (unsigned char)(padnum - 1);
279		/* we need to add 'padnum' padding bytes of value padval */
280	0	for (loop = inl; loop < inl + padnum; loop++)
281	0	out[loop] = padval;
282	0	inl += padnum;
283	0	}
284
285	0	if ((inl % blksz) != 0) {
286	0	ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
287	0	return 0;
288	0	}
289
290		/* Shouldn't normally fail */
291	0	if (!ctx->hw->cipher(ctx, out, in, inl)) {
292	0	ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
293	0	return 0;
294	0	}
295
296	0	if (ctx->alloced) {
297	0	OPENSSL_free(ctx->tlsmac);
298	0	ctx->alloced = 0;
299	0	ctx->tlsmac = NULL;
300	0	}
301
302		/* This only fails if padding is publicly invalid */
303	0	*outl = inl;
304	0	if (!ctx->enc
305	0	&& !ossl_cipher_tlsunpadblock(ctx->libctx, ctx->tlsversion,
306	0	out, outl,
307	0	blksz, &ctx->tlsmac, &ctx->alloced,
308	0	ctx->tlsmacsize, 0)) {
309	0	ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
310	0	return 0;
311	0	}
312	0	return 1;
313	0	}
314
315	0	if (ctx->bufsz != 0)
316	0	nextblocks = ossl_cipher_fillblock(ctx->buf, &ctx->bufsz, blksz,
317	0	&in, &inl);
318	0	else
319	0	nextblocks = inl & ~(blksz - 1);
320
321		/*
322		* If we're decrypting and we end an update on a block boundary we hold
323		* the last block back in case this is the last update call and the last
324		* block is padded.
325		*/
326	0	if (ctx->bufsz == blksz && (ctx->enc \|\| inl > 0 \|\| !ctx->pad)) {
327	0	if (outsize < blksz) {
328	0	ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
329	0	return 0;
330	0	}
331	0	if (!ctx->hw->cipher(ctx, out, ctx->buf, blksz)) {
332	0	ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
333	0	return 0;
334	0	}
335	0	ctx->bufsz = 0;
336	0	outlint = blksz;
337	0	out += blksz;
338	0	}
339	0	if (nextblocks > 0) {
340	0	if (!ctx->enc && ctx->pad && nextblocks == inl) {
341	0	if (!ossl_assert(inl >= blksz)) {
342	0	ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
343	0	return 0;
344	0	}
345	0	nextblocks -= blksz;
346	0	}
347	0	outlint += nextblocks;
348	0	if (outsize < outlint) {
349	0	ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
350	0	return 0;
351	0	}
352	0	}
353	0	if (nextblocks > 0) {
354	0	if (!ctx->hw->cipher(ctx, out, in, nextblocks)) {
355	0	ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
356	0	return 0;
357	0	}
358	0	in += nextblocks;
359	0	inl -= nextblocks;
360	0	}
361	0	if (inl != 0
362	0	&& !ossl_cipher_trailingdata(ctx->buf, &ctx->bufsz, blksz, &in, &inl)) {
363		/* ERR_raise already called */
364	0	return 0;
365	0	}
366
367	0	*outl = outlint;
368	0	return inl == 0;
369	0	}
370
371		int ossl_cipher_generic_block_final(void vctx, unsigned char out,
372		size_t *outl, size_t outsize)
373	0	{
374	0	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
375	0	size_t blksz = ctx->blocksize;
376
377	0	if (!ossl_prov_is_running())
378	0	return 0;
379
380	0	if (!ctx->key_set) {
381	0	ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET);
382	0	return 0;
383	0	}
384
385	0	if (ctx->tlsversion > 0) {
386		/* We never finalize TLS, so this is an error */
387	0	ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
388	0	return 0;
389	0	}
390
391	0	if (ctx->enc) {
392	0	if (ctx->pad) {
393	0	ossl_cipher_padblock(ctx->buf, &ctx->bufsz, blksz);
394	0	} else if (ctx->bufsz == 0) {
395	0	*outl = 0;
396	0	return 1;
397	0	} else if (ctx->bufsz != blksz) {
398	0	ERR_raise(ERR_LIB_PROV, PROV_R_WRONG_FINAL_BLOCK_LENGTH);
399	0	return 0;
400	0	}
401
402	0	if (outsize < blksz) {
403	0	ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
404	0	return 0;
405	0	}
406	0	if (!ctx->hw->cipher(ctx, out, ctx->buf, blksz)) {
407	0	ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
408	0	return 0;
409	0	}
410	0	ctx->bufsz = 0;
411	0	*outl = blksz;
412	0	return 1;
413	0	}
414
415		/* Decrypting */
416	0	if (ctx->bufsz != blksz) {
417	0	if (ctx->bufsz == 0 && !ctx->pad) {
418	0	*outl = 0;
419	0	return 1;
420	0	}
421	0	ERR_raise(ERR_LIB_PROV, PROV_R_WRONG_FINAL_BLOCK_LENGTH);
422	0	return 0;
423	0	}
424
425	0	if (!ctx->hw->cipher(ctx, ctx->buf, ctx->buf, blksz)) {
426	0	ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
427	0	return 0;
428	0	}
429
430	0	if (ctx->pad && !ossl_cipher_unpadblock(ctx->buf, &ctx->bufsz, blksz)) {
431		/* ERR_raise already called */
432	0	return 0;
433	0	}
434
435	0	if (outsize < ctx->bufsz) {
436	0	ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
437	0	return 0;
438	0	}
439	0	memcpy(out, ctx->buf, ctx->bufsz);
440	0	*outl = ctx->bufsz;
441	0	ctx->bufsz = 0;
442	0	return 1;
443	0	}
444
445		int ossl_cipher_generic_stream_update(void vctx, unsigned char out,
446		size_t *outl, size_t outsize,
447		const unsigned char *in, size_t inl)
448	0	{
449	0	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
450
451	0	if (!ctx->key_set) {
452	0	ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET);
453	0	return 0;
454	0	}
455
456	0	if (inl == 0) {
457	0	*outl = 0;
458	0	return 1;
459	0	}
460
461	0	if (outsize < inl) {
462	0	ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
463	0	return 0;
464	0	}
465
466	0	if (!ctx->hw->cipher(ctx, out, in, inl)) {
467	0	ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
468	0	return 0;
469	0	}
470
471	0	*outl = inl;
472	0	if (!ctx->enc && ctx->tlsversion > 0) {
473		/*
474		* Remove any TLS padding. Only used by cipher_aes_cbc_hmac_sha1_hw.c and
475		* cipher_aes_cbc_hmac_sha256_hw.c
476		*/
477	0	if (ctx->removetlspad) {
478		/*
479		* We should have already failed in the cipher() call above if this
480		* isn't true.
481		*/
482	0	if (!ossl_assert(*outl >= (size_t)(out[inl - 1] + 1)))
483	0	return 0;
484		/* The actual padding length */
485	0	*outl -= out[inl - 1] + 1;
486	0	}
487
488		/* TLS MAC and explicit IV if relevant. We should have already failed
489		* in the cipher() call above if *outl is too short.
490		*/
491	0	if (!ossl_assert(*outl >= ctx->removetlsfixed))
492	0	return 0;
493	0	*outl -= ctx->removetlsfixed;
494
495		/* Extract the MAC if there is one */
496	0	if (ctx->tlsmacsize > 0) {
497	0	if (*outl < ctx->tlsmacsize)
498	0	return 0;
499
500	0	ctx->tlsmac = out + *outl - ctx->tlsmacsize;
501	0	*outl -= ctx->tlsmacsize;
502	0	}
503	0	}
504
505	0	return 1;
506	0	}
507		int ossl_cipher_generic_stream_final(void vctx, unsigned char out,
508		size_t *outl, size_t outsize)
509	0	{
510	0	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
511
512	0	if (!ossl_prov_is_running())
513	0	return 0;
514
515	0	if (!ctx->key_set) {
516	0	ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET);
517	0	return 0;
518	0	}
519
520	0	*outl = 0;
521	0	return 1;
522	0	}
523
524		int ossl_cipher_generic_cipher(void vctx, unsigned char out, size_t *outl,
525		size_t outsize, const unsigned char *in,
526		size_t inl)
527	0	{
528	0	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
529
530	0	if (!ossl_prov_is_running())
531	0	return 0;
532
533	0	if (!ctx->key_set) {
534	0	ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET);
535	0	return 0;
536	0	}
537
538	0	if (outsize < inl) {
539	0	ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
540	0	return 0;
541	0	}
542
543	0	if (!ctx->hw->cipher(ctx, out, in, inl)) {
544	0	ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
545	0	return 0;
546	0	}
547
548	0	*outl = inl;
549	0	return 1;
550	0	}
551
552		int ossl_cipher_common_get_ctx_params(PROV_CIPHER_CTX ctx, const struct ossl_cipher_get_ctx_param_list_st p)
553	614	{
554	614	if (p->ivlen != NULL && !OSSL_PARAM_set_size_t(p->ivlen, ctx->ivlen)) {
555	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
556	0	return 0;
557	0	}
558
559	614	if (p->pad != NULL && !OSSL_PARAM_set_uint(p->pad, ctx->pad)) {
560	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
561	0	return 0;
562	0	}
563
564	614	if (p->iv != NULL
565	0	&& !OSSL_PARAM_set_octet_string_or_ptr(p->iv, ctx->oiv, ctx->ivlen)) {
566	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
567	0	return 0;
568	0	}
569
570	614	if (p->updiv != NULL
571	0	&& !OSSL_PARAM_set_octet_string_or_ptr(p->updiv, ctx->iv, ctx->ivlen)) {
572	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
573	0	return 0;
574	0	}
575
576	614	if (p->num != NULL && !OSSL_PARAM_set_uint(p->num, ctx->num)) {
577	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
578	0	return 0;
579	0	}
580
581	614	if (p->keylen != NULL && !OSSL_PARAM_set_size_t(p->keylen, ctx->keylen)) {
582	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
583	0	return 0;
584	0	}
585
586	614	if (p->tlsmac != NULL
587	0	&& !OSSL_PARAM_set_octet_ptr(p->tlsmac, ctx->tlsmac, ctx->tlsmacsize)) {
588	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
589	0	return 0;
590	0	}
591	614	return 1;
592	614	}
593
594		int ossl_cipher_generic_get_ctx_params(void *vctx, OSSL_PARAM params[])
595	614	{
596	614	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
597	614	struct ossl_cipher_get_ctx_param_list_st p;
598
599	614	if (ctx == NULL \|\| !cipher_generic_get_ctx_params_decoder(params, &p))
600	0	return 0;
601	614	return ossl_cipher_common_get_ctx_params(ctx, &p);
602	614	}
603
604		int ossl_cipher_common_set_ctx_params(PROV_CIPHER_CTX ctx, const struct ossl_cipher_set_ctx_param_list_st p)
605	0	{
606	0	if (p->pad != NULL) {
607	0	unsigned int pad;
608
609	0	if (!OSSL_PARAM_get_uint(p->pad, &pad)) {
610	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
611	0	return 0;
612	0	}
613	0	ctx->pad = pad ? 1 : 0;
614	0	}
615
616	0	if (p->bits != NULL) {
617	0	unsigned int bits;
618
619	0	if (!OSSL_PARAM_get_uint(p->bits, &bits)) {
620	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
621	0	return 0;
622	0	}
623	0	ctx->use_bits = bits ? 1 : 0;
624	0	}
625
626	0	if (p->tlsvers != NULL) {
627	0	if (!OSSL_PARAM_get_uint(p->tlsvers, &ctx->tlsversion)) {
628	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
629	0	return 0;
630	0	}
631	0	}
632
633	0	if (p->tlsmacsize != NULL) {
634	0	if (!OSSL_PARAM_get_size_t(p->tlsmacsize, &ctx->tlsmacsize)) {
635	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
636	0	return 0;
637	0	}
638	0	}
639
640	0	if (p->num != NULL) {
641	0	unsigned int num;
642
643	0	if (!OSSL_PARAM_get_uint(p->num, &num)) {
644	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
645	0	return 0;
646	0	}
647	0	if (ctx->blocksize > 0 && num >= (unsigned int)ctx->blocksize) {
648	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
649	0	return 0;
650	0	}
651	0	ctx->num = num;
652	0	}
653	0	return 1;
654	0	}
655
656		int ossl_cipher_generic_set_ctx_params(void *vctx, const OSSL_PARAM params[])
657	0	{
658	0	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
659	0	struct ossl_cipher_set_ctx_param_list_st p;
660
661	0	if (ossl_param_is_empty(params))
662	0	return 1;
663
664	0	if (ctx == NULL \|\| !cipher_generic_set_ctx_params_decoder(params, &p))
665	0	return 0;
666	0	return ossl_cipher_common_set_ctx_params(ctx, &p);
667	0	}
668
669		int ossl_cipher_generic_initiv(PROV_CIPHER_CTX ctx, const unsigned char iv,
670		size_t ivlen)
671	141	{
672	141	if (ivlen != ctx->ivlen
673	141	\|\| ivlen > sizeof(ctx->iv)) {
674	0	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IV_LENGTH);
675	0	return 0;
676	0	}
677	141	ctx->iv_set = 1;
678	141	memcpy(ctx->iv, iv, ivlen);
679	141	memcpy(ctx->oiv, iv, ivlen);
680	141	return 1;
681	141	}
682
683		void ossl_cipher_generic_initkey(void *vctx, size_t kbits, size_t blkbits,
684		size_t ivbits, unsigned int mode,
685		uint64_t flags, const PROV_CIPHER_HW *hw,
686		void *provctx)
687	473	{
688	473	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
689
690	473	if ((flags & PROV_CIPHER_FLAG_INVERSE_CIPHER) != 0)
691	0	ctx->inverse_cipher = 1;
692	473	if ((flags & PROV_CIPHER_FLAG_VARIABLE_LENGTH) != 0)
693	0	ctx->variable_keylength = 1;
694
695	473	ctx->pad = 1;
696	473	ctx->keylen = ((kbits) / 8);
697	473	ctx->ivlen = ((ivbits) / 8);
698	473	ctx->hw = hw;
699	473	ctx->mode = mode;
700	473	ctx->blocksize = blkbits / 8;
701	473	if (provctx != NULL)
702	0	ctx->libctx = PROV_LIBCTX_OF(provctx); /* used for rand */
703	473	}