[thirdparty/openssl.git] / providers / implementations / asymciphers / rsa_enc.c

/*
 * Copyright 2019-2020 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
 */

/*
 * RSA low level APIs are deprecated for public use, but still ok for
 * internal use.
 */
#include "internal/deprecated.h"

#include <openssl/crypto.h>
#include <openssl/evp.h>
#include <openssl/core_dispatch.h>
#include <openssl/core_names.h>
#include <openssl/rsa.h>
#include <openssl/params.h>
#include <openssl/err.h>
/* Just for SSL_MAX_MASTER_KEY_LENGTH */
#include <openssl/ssl.h>
#include "internal/constant_time.h"
#include "internal/sizes.h"
#include "crypto/rsa.h"
#include "prov/providercommonerr.h"
#include "prov/provider_ctx.h"
#include "prov/implementations.h"
#include "prov/providercommon.h"
#include "prov/securitycheck.h"

#include <stdlib.h>

static OSSL_FUNC_asym_cipher_newctx_fn rsa_newctx;
static OSSL_FUNC_asym_cipher_encrypt_init_fn rsa_encrypt_init;
static OSSL_FUNC_asym_cipher_encrypt_fn rsa_encrypt;
static OSSL_FUNC_asym_cipher_decrypt_init_fn rsa_decrypt_init;
static OSSL_FUNC_asym_cipher_decrypt_fn rsa_decrypt;
static OSSL_FUNC_asym_cipher_freectx_fn rsa_freectx;
static OSSL_FUNC_asym_cipher_dupctx_fn rsa_dupctx;
static OSSL_FUNC_asym_cipher_get_ctx_params_fn rsa_get_ctx_params;
static OSSL_FUNC_asym_cipher_gettable_ctx_params_fn rsa_gettable_ctx_params;
static OSSL_FUNC_asym_cipher_set_ctx_params_fn rsa_set_ctx_params;
static OSSL_FUNC_asym_cipher_settable_ctx_params_fn rsa_settable_ctx_params;

static OSSL_ITEM padding_item[] = {
    { RSA_PKCS1_PADDING,        OSSL_PKEY_RSA_PAD_MODE_PKCSV15 },
    { RSA_SSLV23_PADDING,       OSSL_PKEY_RSA_PAD_MODE_SSLV23 },
    { RSA_NO_PADDING,           OSSL_PKEY_RSA_PAD_MODE_NONE },
    { RSA_PKCS1_OAEP_PADDING,   OSSL_PKEY_RSA_PAD_MODE_OAEP }, /* Correct spelling first */
    { RSA_PKCS1_OAEP_PADDING,   "oeap"   },
    { RSA_X931_PADDING,         OSSL_PKEY_RSA_PAD_MODE_X931 },
    { 0,                        NULL     }
};

/*
 * What's passed as an actual key is defined by the KEYMGMT interface.
 * We happen to know that our KEYMGMT simply passes RSA structures, so
 * we use that here too.
 */

typedef struct {
    OPENSSL_CTX *libctx;
    RSA *rsa;
    int pad_mode;
    int operation;
    /* OAEP message digest */
    EVP_MD *oaep_md;
    /* message digest for MGF1 */
    EVP_MD *mgf1_md;
    /* OAEP label */
    unsigned char *oaep_label;
    size_t oaep_labellen;
    /* TLS padding */
    unsigned int client_version;
    unsigned int alt_version;
} PROV_RSA_CTX;

static void *rsa_newctx(void *provctx)
{
    PROV_RSA_CTX *prsactx;

    if (!ossl_prov_is_running())
        return NULL;
    prsactx = OPENSSL_zalloc(sizeof(PROV_RSA_CTX));
    if (prsactx == NULL)
        return NULL;
    prsactx->libctx = PROV_LIBRARY_CONTEXT_OF(provctx);

    return prsactx;
}

static int rsa_init(void *vprsactx, void *vrsa, int operation)
{
    PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;

    if (!ossl_prov_is_running()
            || prsactx == NULL
            || vrsa == NULL
            || !RSA_up_ref(vrsa))
        return 0;
    RSA_free(prsactx->rsa);
    prsactx->rsa = vrsa;
    prsactx->operation = operation;

    switch (RSA_test_flags(prsactx->rsa, RSA_FLAG_TYPE_MASK)) {
    case RSA_FLAG_TYPE_RSA:
        prsactx->pad_mode = RSA_PKCS1_PADDING;
        break;
    default:
        ERR_raise(ERR_LIB_PROV, PROV_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
        return 0;
    }
    if (!rsa_check_key(vrsa, operation == EVP_PKEY_OP_ENCRYPT)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
        return 0;
    }
    return 1;
}

static int rsa_encrypt_init(void *vprsactx, void *vrsa)
{
    return rsa_init(vprsactx, vrsa, EVP_PKEY_OP_ENCRYPT);
}

static int rsa_decrypt_init(void *vprsactx, void *vrsa)
{
    return rsa_init(vprsactx, vrsa, EVP_PKEY_OP_DECRYPT);
}

static int rsa_encrypt(void *vprsactx, unsigned char *out, size_t *outlen,
                       size_t outsize, const unsigned char *in, size_t inlen)
{
    PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
    int ret;

    if (!ossl_prov_is_running())
        return 0;

    if (out == NULL) {
        size_t len = RSA_size(prsactx->rsa);

        if (len == 0) {
            ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
            return 0;
        }
        *outlen = len;
        return 1;
    }

    if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
        int rsasize = RSA_size(prsactx->rsa);
        unsigned char *tbuf;

        if ((tbuf = OPENSSL_malloc(rsasize)) == NULL) {
            PROVerr(0, ERR_R_MALLOC_FAILURE);
            return 0;
        }
        if (prsactx->oaep_md == NULL) {
            OPENSSL_free(tbuf);
            prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
            PROVerr(0, ERR_R_INTERNAL_ERROR);
            return 0;
        }
        ret =
            rsa_padding_add_PKCS1_OAEP_mgf1_with_libctx(prsactx->libctx, tbuf,
                                                        rsasize, in, inlen,
                                                        prsactx->oaep_label,
                                                        prsactx->oaep_labellen,
                                                        prsactx->oaep_md,
                                                        prsactx->mgf1_md);

        if (!ret) {
            OPENSSL_free(tbuf);
            return 0;
        }
        ret = RSA_public_encrypt(rsasize, tbuf, out, prsactx->rsa,
                                 RSA_NO_PADDING);
        OPENSSL_free(tbuf);
    } else {
        ret = RSA_public_encrypt(inlen, in, out, prsactx->rsa,
                                 prsactx->pad_mode);
    }
    /* A ret value of 0 is not an error */
    if (ret < 0)
        return ret;
    *outlen = ret;
    return 1;
}

static int rsa_decrypt(void *vprsactx, unsigned char *out, size_t *outlen,
                       size_t outsize, const unsigned char *in, size_t inlen)
{
    PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
    int ret;
    size_t len = RSA_size(prsactx->rsa);

    if (!ossl_prov_is_running())
        return 0;

    if (prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
        if (out == NULL) {
            *outlen = SSL_MAX_MASTER_KEY_LENGTH;
            return 1;
        }
        if (outsize < SSL_MAX_MASTER_KEY_LENGTH) {
            ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
            return 0;
        }
    } else {
        if (out == NULL) {
            if (len == 0) {
                ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
                return 0;
            }
            *outlen = len;
            return 1;
        }

        if (outsize < len) {
            ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
            return 0;
        }
    }

    if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING
            || prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
        unsigned char *tbuf;

        if ((tbuf = OPENSSL_malloc(len)) == NULL) {
            PROVerr(0, ERR_R_MALLOC_FAILURE);
            return 0;
        }
        ret = RSA_private_decrypt(inlen, in, tbuf, prsactx->rsa,
                                  RSA_NO_PADDING);
        /*
         * With no padding then, on success ret should be len, otherwise an
         * error occurred (non-constant time)
         */
        if (ret != (int)len) {
            OPENSSL_free(tbuf);
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_DECRYPT);
            return 0;
        }
        if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
            if (prsactx->oaep_md == NULL) {
                prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
                if (prsactx->oaep_md == NULL) {
                    PROVerr(0, ERR_R_INTERNAL_ERROR);
                    return 0;
                }
            }
            ret = RSA_padding_check_PKCS1_OAEP_mgf1(out, outsize, tbuf,
                                                    len, len,
                                                    prsactx->oaep_label,
                                                    prsactx->oaep_labellen,
                                                    prsactx->oaep_md,
                                                    prsactx->mgf1_md);
        } else {
            /* RSA_PKCS1_WITH_TLS_PADDING */
            if (prsactx->client_version <= 0) {
                ERR_raise(ERR_LIB_PROV, PROV_R_BAD_TLS_CLIENT_VERSION);
                return 0;
            }
            ret = rsa_padding_check_PKCS1_type_2_TLS(prsactx->libctx, out,
                                                     outsize,
                                                     tbuf, len,
                                                     prsactx->client_version,
                                                     prsactx->alt_version);
        }
        OPENSSL_free(tbuf);
    } else {
        ret = RSA_private_decrypt(inlen, in, out, prsactx->rsa,
                                  prsactx->pad_mode);
    }
    *outlen = constant_time_select_s(constant_time_msb_s(ret), *outlen, ret);
    ret = constant_time_select_int(constant_time_msb(ret), 0, 1);
    return ret;
}

static void rsa_freectx(void *vprsactx)
{
    PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;

    RSA_free(prsactx->rsa);

    EVP_MD_free(prsactx->oaep_md);
    EVP_MD_free(prsactx->mgf1_md);
    OPENSSL_free(prsactx->oaep_label);

    OPENSSL_free(prsactx);
}

static void *rsa_dupctx(void *vprsactx)
{
    PROV_RSA_CTX *srcctx = (PROV_RSA_CTX *)vprsactx;
    PROV_RSA_CTX *dstctx;

    if (!ossl_prov_is_running())
        return NULL;

    dstctx = OPENSSL_zalloc(sizeof(*srcctx));
    if (dstctx == NULL)
        return NULL;

    *dstctx = *srcctx;
    if (dstctx->rsa != NULL && !RSA_up_ref(dstctx->rsa)) {
        OPENSSL_free(dstctx);
        return NULL;
    }

    if (dstctx->oaep_md != NULL && !EVP_MD_up_ref(dstctx->oaep_md)) {
        RSA_free(dstctx->rsa);
        OPENSSL_free(dstctx);
        return NULL;
    }

    if (dstctx->mgf1_md != NULL && !EVP_MD_up_ref(dstctx->mgf1_md)) {
        RSA_free(dstctx->rsa);
        EVP_MD_free(dstctx->oaep_md);
        OPENSSL_free(dstctx);
        return NULL;
    }

    return dstctx;
}

static int rsa_get_ctx_params(void *vprsactx, OSSL_PARAM *params)
{
    PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
    OSSL_PARAM *p;

    if (prsactx == NULL || params == NULL)
        return 0;

    p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
    if (p != NULL)
        switch (p->data_type) {
        case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
            if (!OSSL_PARAM_set_int(p, prsactx->pad_mode))
                return 0;
            break;
        case OSSL_PARAM_UTF8_STRING:
            {
                int i;
                const char *word = NULL;

                for (i = 0; padding_item[i].id != 0; i++) {
                    if (prsactx->pad_mode == (int)padding_item[i].id) {
                        word = padding_item[i].ptr;
                        break;
                    }
                }

                if (word != NULL) {
                    if (!OSSL_PARAM_set_utf8_string(p, word))
                        return 0;
                } else {
                    ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
                }
            }
            break;
        default:
            return 0;
        }

    p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
    if (p != NULL && !OSSL_PARAM_set_utf8_string(p, prsactx->oaep_md == NULL
                                                    ? ""
                                                    : EVP_MD_name(prsactx->oaep_md)))
        return 0;

    p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
    if (p != NULL) {
        EVP_MD *mgf1_md = prsactx->mgf1_md == NULL ? prsactx->oaep_md
                                                   : prsactx->mgf1_md;

        if (!OSSL_PARAM_set_utf8_string(p, mgf1_md == NULL
                                           ? ""
                                           : EVP_MD_name(mgf1_md)))
        return 0;
    }

    p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
    if (p != NULL && !OSSL_PARAM_set_octet_ptr(p, prsactx->oaep_label, 0))
        return 0;

    p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL_LEN);
    if (p != NULL && !OSSL_PARAM_set_size_t(p, prsactx->oaep_labellen))
        return 0;

    p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
    if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->client_version))
        return 0;

    p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
    if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->alt_version))
        return 0;

    return 1;
}

static const OSSL_PARAM known_gettable_ctx_params[] = {
    OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
    OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
    OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
    OSSL_PARAM_DEFN(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, OSSL_PARAM_OCTET_PTR,
                    NULL, 0),
    OSSL_PARAM_size_t(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL_LEN, NULL),
    OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
    OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
    OSSL_PARAM_END
};

static const OSSL_PARAM *rsa_gettable_ctx_params(ossl_unused void *provctx)
{
    return known_gettable_ctx_params;
}

static int rsa_set_ctx_params(void *vprsactx, const OSSL_PARAM params[])
{
    PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
    const OSSL_PARAM *p;
    char mdname[OSSL_MAX_NAME_SIZE];
    char mdprops[OSSL_MAX_PROPQUERY_SIZE] = { '\0' };
    char *str = mdname;

    if (prsactx == NULL || params == NULL)
        return 0;

    p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
    if (p != NULL) {
        if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
            return 0;

        str = mdprops;
        p = OSSL_PARAM_locate_const(params,
                                    OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS);
        if (p != NULL) {
            if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
                return 0;
        }

        EVP_MD_free(prsactx->oaep_md);
        prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, mdname, mdprops);

        if (prsactx->oaep_md == NULL)
            return 0;
    }

    p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
    if (p != NULL) {
        int pad_mode = 0;

        switch (p->data_type) {
        case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
            if (!OSSL_PARAM_get_int(p, &pad_mode))
                return 0;
            break;
        case OSSL_PARAM_UTF8_STRING:
            {
                int i;

                if (p->data == NULL)
                    return 0;

                for (i = 0; padding_item[i].id != 0; i++) {
                    if (strcmp(p->data, padding_item[i].ptr) == 0) {
                        pad_mode = padding_item[i].id;
                        break;
                    }
                }
            }
            break;
        default:
            return 0;
        }

        /*
         * PSS padding is for signatures only so is not compatible with
         * asymmetric cipher use.
         */
        if (pad_mode == RSA_PKCS1_PSS_PADDING)
            return 0;
        if (pad_mode == RSA_PKCS1_OAEP_PADDING && prsactx->oaep_md == NULL) {
            prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA1", mdprops);
            if (prsactx->oaep_md == NULL)
                return 0;
        }
        prsactx->pad_mode = pad_mode;
    }

    p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
    if (p != NULL) {
        if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
            return 0;

        str = mdprops;
        p = OSSL_PARAM_locate_const(params,
                                    OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS);
        if (p != NULL) {
            if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
                return 0;
        } else {
            str = NULL;
        }

        EVP_MD_free(prsactx->mgf1_md);
        prsactx->mgf1_md = EVP_MD_fetch(prsactx->libctx, mdname, str);

        if (prsactx->mgf1_md == NULL)
            return 0;
    }

    p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
    if (p != NULL) {
        void *tmp_label = NULL;
        size_t tmp_labellen;

        if (!OSSL_PARAM_get_octet_string(p, &tmp_label, 0, &tmp_labellen))
            return 0;
        OPENSSL_free(prsactx->oaep_label);
        prsactx->oaep_label = (unsigned char *)tmp_label;
        prsactx->oaep_labellen = tmp_labellen;
    }

    p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
    if (p != NULL) {
        unsigned int client_version;

        if (!OSSL_PARAM_get_uint(p, &client_version))
            return 0;
        prsactx->client_version = client_version;
    }

    p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
    if (p != NULL) {
        unsigned int alt_version;

        if (!OSSL_PARAM_get_uint(p, &alt_version))
            return 0;
        prsactx->alt_version = alt_version;
    }

    return 1;
}

static const OSSL_PARAM known_settable_ctx_params[] = {
    OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
    OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
    OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
    OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS, NULL, 0),
    OSSL_PARAM_octet_string(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, NULL, 0),
    OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
    OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
    OSSL_PARAM_END
};

static const OSSL_PARAM *rsa_settable_ctx_params(ossl_unused void *provctx)
{
    return known_settable_ctx_params;
}

const OSSL_DISPATCH ossl_rsa_asym_cipher_functions[] = {
    { OSSL_FUNC_ASYM_CIPHER_NEWCTX, (void (*)(void))rsa_newctx },
    { OSSL_FUNC_ASYM_CIPHER_ENCRYPT_INIT, (void (*)(void))rsa_encrypt_init },
    { OSSL_FUNC_ASYM_CIPHER_ENCRYPT, (void (*)(void))rsa_encrypt },
    { OSSL_FUNC_ASYM_CIPHER_DECRYPT_INIT, (void (*)(void))rsa_decrypt_init },
    { OSSL_FUNC_ASYM_CIPHER_DECRYPT, (void (*)(void))rsa_decrypt },
    { OSSL_FUNC_ASYM_CIPHER_FREECTX, (void (*)(void))rsa_freectx },
    { OSSL_FUNC_ASYM_CIPHER_DUPCTX, (void (*)(void))rsa_dupctx },
    { OSSL_FUNC_ASYM_CIPHER_GET_CTX_PARAMS,
      (void (*)(void))rsa_get_ctx_params },
    { OSSL_FUNC_ASYM_CIPHER_GETTABLE_CTX_PARAMS,
      (void (*)(void))rsa_gettable_ctx_params },
    { OSSL_FUNC_ASYM_CIPHER_SET_CTX_PARAMS,
      (void (*)(void))rsa_set_ctx_params },
    { OSSL_FUNC_ASYM_CIPHER_SETTABLE_CTX_PARAMS,
      (void (*)(void))rsa_settable_ctx_params },
    { 0, NULL }
};
Commit	Line	Data
89abd1b6	1	/*
33388b44	2	* Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
89abd1b6 MC	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
c5f87134 P	10	/*
	11	* RSA low level APIs are deprecated for public use, but still ok for
	12	* internal use.
	13	*/
	14	#include "internal/deprecated.h"
	15
89abd1b6 MC	16	#include <openssl/crypto.h>
89abd1b6 MC	17	#include <openssl/evp.h>
23c48d94	18	#include <openssl/core_dispatch.h>
89abd1b6 MC	19	#include <openssl/core_names.h>
	20	#include <openssl/rsa.h>
	21	#include <openssl/params.h>
	22	#include <openssl/err.h>
d9a75107 MC	23	/* Just for SSL_MAX_MASTER_KEY_LENGTH */
d9a75107 MC	24	#include <openssl/ssl.h>
89abd1b6	25	#include "internal/constant_time.h"
c24937d5	26	#include "internal/sizes.h"
d9a75107	27	#include "crypto/rsa.h"
89abd1b6 MC	28	#include "prov/providercommonerr.h"
	29	#include "prov/provider_ctx.h"
	30	#include "prov/implementations.h"
87fe138d	31	#include "prov/providercommon.h"
7a810fac	32	#include "prov/securitycheck.h"
89abd1b6 MC	33
	34	#include <stdlib.h>
	35
363b1e5d	36	static OSSL_FUNC_asym_cipher_newctx_fn rsa_newctx;
8d17cca5	37	static OSSL_FUNC_asym_cipher_encrypt_init_fn rsa_encrypt_init;
363b1e5d	38	static OSSL_FUNC_asym_cipher_encrypt_fn rsa_encrypt;
8d17cca5	39	static OSSL_FUNC_asym_cipher_decrypt_init_fn rsa_decrypt_init;
363b1e5d DMSP	40	static OSSL_FUNC_asym_cipher_decrypt_fn rsa_decrypt;
	41	static OSSL_FUNC_asym_cipher_freectx_fn rsa_freectx;
	42	static OSSL_FUNC_asym_cipher_dupctx_fn rsa_dupctx;
	43	static OSSL_FUNC_asym_cipher_get_ctx_params_fn rsa_get_ctx_params;
	44	static OSSL_FUNC_asym_cipher_gettable_ctx_params_fn rsa_gettable_ctx_params;
	45	static OSSL_FUNC_asym_cipher_set_ctx_params_fn rsa_set_ctx_params;
	46	static OSSL_FUNC_asym_cipher_settable_ctx_params_fn rsa_settable_ctx_params;
89abd1b6	47
31a796d1	48	static OSSL_ITEM padding_item[] = {
b8086652 SL	49	{ RSA_PKCS1_PADDING, OSSL_PKEY_RSA_PAD_MODE_PKCSV15 },
	50	{ RSA_SSLV23_PADDING, OSSL_PKEY_RSA_PAD_MODE_SSLV23 },
	51	{ RSA_NO_PADDING, OSSL_PKEY_RSA_PAD_MODE_NONE },
	52	{ RSA_PKCS1_OAEP_PADDING, OSSL_PKEY_RSA_PAD_MODE_OAEP }, /* Correct spelling first */
31a796d1	53	{ RSA_PKCS1_OAEP_PADDING, "oeap" },
b8086652	54	{ RSA_X931_PADDING, OSSL_PKEY_RSA_PAD_MODE_X931 },
31a796d1 RL	55	{ 0, NULL }
31a796d1 RL	56	};
89abd1b6 MC	57
	58	/*
	59	* What's passed as an actual key is defined by the KEYMGMT interface.
	60	* We happen to know that our KEYMGMT simply passes RSA structures, so
	61	* we use that here too.
	62	*/
	63
	64	typedef struct {
	65	OPENSSL_CTX *libctx;
	66	RSA *rsa;
	67	int pad_mode;
8d17cca5	68	int operation;
89abd1b6 MC	69	/* OAEP message digest */
	70	EVP_MD *oaep_md;
	71	/* message digest for MGF1 */
	72	EVP_MD *mgf1_md;
	73	/* OAEP label */
	74	unsigned char *oaep_label;
	75	size_t oaep_labellen;
d9a75107 MC	76	/* TLS padding */
	77	unsigned int client_version;
	78	unsigned int alt_version;
89abd1b6 MC	79	} PROV_RSA_CTX;
	80
	81	static void rsa_newctx(void provctx)
	82	{
87fe138d	83	PROV_RSA_CTX *prsactx;
89abd1b6	84
87fe138d P	85	if (!ossl_prov_is_running())
	86	return NULL;
	87	prsactx = OPENSSL_zalloc(sizeof(PROV_RSA_CTX));
89abd1b6 MC	88	if (prsactx == NULL)
	89	return NULL;
	90	prsactx->libctx = PROV_LIBRARY_CONTEXT_OF(provctx);
	91
	92	return prsactx;
	93	}
	94
8d17cca5	95	static int rsa_init(void vprsactx, void vrsa, int operation)
89abd1b6 MC	96	{
	97	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
	98
87fe138d P	99	if (!ossl_prov_is_running()
	100	\|\| prsactx == NULL
	101	\|\| vrsa == NULL
	102	\|\| !RSA_up_ref(vrsa))
89abd1b6 MC	103	return 0;
	104	RSA_free(prsactx->rsa);
	105	prsactx->rsa = vrsa;
8d17cca5	106	prsactx->operation = operation;
106ec30b RL	107
	108	switch (RSA_test_flags(prsactx->rsa, RSA_FLAG_TYPE_MASK)) {
	109	case RSA_FLAG_TYPE_RSA:
	110	prsactx->pad_mode = RSA_PKCS1_PADDING;
	111	break;
	112	default:
	113	ERR_raise(ERR_LIB_PROV, PROV_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	114	return 0;
	115	}
8d17cca5 SL	116	if (!rsa_check_key(vrsa, operation == EVP_PKEY_OP_ENCRYPT)) {
	117	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
	118	return 0;
	119	}
89abd1b6 MC	120	return 1;
	121	}
	122
8d17cca5 SL	123	static int rsa_encrypt_init(void vprsactx, void vrsa)
	124	{
	125	return rsa_init(vprsactx, vrsa, EVP_PKEY_OP_ENCRYPT);
	126	}
	127
	128	static int rsa_decrypt_init(void vprsactx, void vrsa)
	129	{
	130	return rsa_init(vprsactx, vrsa, EVP_PKEY_OP_DECRYPT);
	131	}
	132
89abd1b6 MC	133	static int rsa_encrypt(void vprsactx, unsigned char out, size_t *outlen,
	134	size_t outsize, const unsigned char *in, size_t inlen)
	135	{
	136	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
	137	int ret;
	138
87fe138d P	139	if (!ossl_prov_is_running())
	140	return 0;
	141
89abd1b6 MC	142	if (out == NULL) {
	143	size_t len = RSA_size(prsactx->rsa);
	144
	145	if (len == 0) {
	146	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
	147	return 0;
	148	}
	149	*outlen = len;
	150	return 1;
	151	}
	152
	153	if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
	154	int rsasize = RSA_size(prsactx->rsa);
	155	unsigned char *tbuf;
	156
	157	if ((tbuf = OPENSSL_malloc(rsasize)) == NULL) {
	158	PROVerr(0, ERR_R_MALLOC_FAILURE);
	159	return 0;
	160	}
afb638f1	161	if (prsactx->oaep_md == NULL) {
5472821e	162	OPENSSL_free(tbuf);
afb638f1 MC	163	prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
	164	PROVerr(0, ERR_R_INTERNAL_ERROR);
	165	return 0;
	166	}
f7f53d7d RL	167	ret =
	168	rsa_padding_add_PKCS1_OAEP_mgf1_with_libctx(prsactx->libctx, tbuf,
	169	rsasize, in, inlen,
	170	prsactx->oaep_label,
	171	prsactx->oaep_labellen,
	172	prsactx->oaep_md,
	173	prsactx->mgf1_md);
89abd1b6 MC	174
	175	if (!ret) {
	176	OPENSSL_free(tbuf);
	177	return 0;
	178	}
	179	ret = RSA_public_encrypt(rsasize, tbuf, out, prsactx->rsa,
	180	RSA_NO_PADDING);
	181	OPENSSL_free(tbuf);
	182	} else {
	183	ret = RSA_public_encrypt(inlen, in, out, prsactx->rsa,
	184	prsactx->pad_mode);
	185	}
	186	/* A ret value of 0 is not an error */
	187	if (ret < 0)
	188	return ret;
	189	*outlen = ret;
	190	return 1;
	191	}
	192
	193	static int rsa_decrypt(void vprsactx, unsigned char out, size_t *outlen,
	194	size_t outsize, const unsigned char *in, size_t inlen)
	195	{
	196	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
	197	int ret;
d9a75107	198	size_t len = RSA_size(prsactx->rsa);
89abd1b6	199
87fe138d P	200	if (!ossl_prov_is_running())
	201	return 0;
	202
d9a75107 MC	203	if (prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
	204	if (out == NULL) {
	205	*outlen = SSL_MAX_MASTER_KEY_LENGTH;
	206	return 1;
	207	}
	208	if (outsize < SSL_MAX_MASTER_KEY_LENGTH) {
	209	ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
	210	return 0;
	211	}
	212	} else {
	213	if (out == NULL) {
	214	if (len == 0) {
	215	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
	216	return 0;
	217	}
	218	*outlen = len;
	219	return 1;
	220	}
89abd1b6	221
d9a75107 MC	222	if (outsize < len) {
d9a75107 MC	223	ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
89abd1b6 MC	224	return 0;
89abd1b6 MC	225	}
89abd1b6 MC	226	}
89abd1b6 MC	227
d9a75107 MC	228	if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING
d9a75107 MC	229	\|\| prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
89abd1b6 MC	230	unsigned char *tbuf;
89abd1b6 MC	231
d9a75107	232	if ((tbuf = OPENSSL_malloc(len)) == NULL) {
89abd1b6 MC	233	PROVerr(0, ERR_R_MALLOC_FAILURE);
	234	return 0;
	235	}
	236	ret = RSA_private_decrypt(inlen, in, tbuf, prsactx->rsa,
	237	RSA_NO_PADDING);
d9a75107 MC	238	/*
	239	* With no padding then, on success ret should be len, otherwise an
	240	* error occurred (non-constant time)
	241	*/
	242	if (ret != (int)len) {
89abd1b6	243	OPENSSL_free(tbuf);
d9a75107	244	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_DECRYPT);
89abd1b6 MC	245	return 0;
89abd1b6 MC	246	}
d9a75107	247	if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
afb638f1 MC	248	if (prsactx->oaep_md == NULL) {
	249	prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
	250	if (prsactx->oaep_md == NULL) {
	251	PROVerr(0, ERR_R_INTERNAL_ERROR);
	252	return 0;
	253	}
	254	}
d9a75107 MC	255	ret = RSA_padding_check_PKCS1_OAEP_mgf1(out, outsize, tbuf,
	256	len, len,
	257	prsactx->oaep_label,
	258	prsactx->oaep_labellen,
	259	prsactx->oaep_md,
	260	prsactx->mgf1_md);
	261	} else {
	262	/* RSA_PKCS1_WITH_TLS_PADDING */
	263	if (prsactx->client_version <= 0) {
	264	ERR_raise(ERR_LIB_PROV, PROV_R_BAD_TLS_CLIENT_VERSION);
	265	return 0;
	266	}
0f2deef5 MC	267	ret = rsa_padding_check_PKCS1_type_2_TLS(prsactx->libctx, out,
0f2deef5 MC	268	outsize,
d9a75107 MC	269	tbuf, len,
	270	prsactx->client_version,
	271	prsactx->alt_version);
	272	}
89abd1b6 MC	273	OPENSSL_free(tbuf);
	274	} else {
	275	ret = RSA_private_decrypt(inlen, in, out, prsactx->rsa,
	276	prsactx->pad_mode);
	277	}
	278	outlen = constant_time_select_s(constant_time_msb_s(ret), outlen, ret);
	279	ret = constant_time_select_int(constant_time_msb(ret), 0, 1);
	280	return ret;
	281	}
	282
	283	static void rsa_freectx(void *vprsactx)
	284	{
	285	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
	286
	287	RSA_free(prsactx->rsa);
	288
	289	EVP_MD_free(prsactx->oaep_md);
	290	EVP_MD_free(prsactx->mgf1_md);
5606922c	291	OPENSSL_free(prsactx->oaep_label);
89abd1b6 MC	292
	293	OPENSSL_free(prsactx);
	294	}
	295
	296	static void rsa_dupctx(void vprsactx)
	297	{
	298	PROV_RSA_CTX srcctx = (PROV_RSA_CTX )vprsactx;
	299	PROV_RSA_CTX *dstctx;
	300
87fe138d P	301	if (!ossl_prov_is_running())
	302	return NULL;
	303
89abd1b6 MC	304	dstctx = OPENSSL_zalloc(sizeof(*srcctx));
	305	if (dstctx == NULL)
	306	return NULL;
	307
	308	dstctx = srcctx;
	309	if (dstctx->rsa != NULL && !RSA_up_ref(dstctx->rsa)) {
	310	OPENSSL_free(dstctx);
	311	return NULL;
	312	}
	313
	314	if (dstctx->oaep_md != NULL && !EVP_MD_up_ref(dstctx->oaep_md)) {
	315	RSA_free(dstctx->rsa);
	316	OPENSSL_free(dstctx);
	317	return NULL;
	318	}
	319
	320	if (dstctx->mgf1_md != NULL && !EVP_MD_up_ref(dstctx->mgf1_md)) {
	321	RSA_free(dstctx->rsa);
	322	EVP_MD_free(dstctx->oaep_md);
	323	OPENSSL_free(dstctx);
	324	return NULL;
	325	}
	326
	327	return dstctx;
	328	}
	329
	330	static int rsa_get_ctx_params(void vprsactx, OSSL_PARAM params)
	331	{
	332	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
	333	OSSL_PARAM *p;
	334
	335	if (prsactx == NULL \|\| params == NULL)
	336	return 0;
	337
	338	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
31a796d1 RL	339	if (p != NULL)
	340	switch (p->data_type) {
	341	case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
	342	if (!OSSL_PARAM_set_int(p, prsactx->pad_mode))
	343	return 0;
	344	break;
	345	case OSSL_PARAM_UTF8_STRING:
	346	{
	347	int i;
	348	const char *word = NULL;
	349
	350	for (i = 0; padding_item[i].id != 0; i++) {
	351	if (prsactx->pad_mode == (int)padding_item[i].id) {
	352	word = padding_item[i].ptr;
	353	break;
	354	}
	355	}
	356
	357	if (word != NULL) {
	358	if (!OSSL_PARAM_set_utf8_string(p, word))
	359	return 0;
	360	} else {
	361	ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
	362	}
	363	}
	364	break;
	365	default:
	366	return 0;
	367	}
89abd1b6 MC	368
	369	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
	370	if (p != NULL && !OSSL_PARAM_set_utf8_string(p, prsactx->oaep_md == NULL
	371	? ""
	372	: EVP_MD_name(prsactx->oaep_md)))
	373	return 0;
	374
	375	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
	376	if (p != NULL) {
	377	EVP_MD *mgf1_md = prsactx->mgf1_md == NULL ? prsactx->oaep_md
	378	: prsactx->mgf1_md;
	379
	380	if (!OSSL_PARAM_set_utf8_string(p, mgf1_md == NULL
	381	? ""
	382	: EVP_MD_name(mgf1_md)))
	383	return 0;
	384	}
	385
	386	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
	387	if (p != NULL && !OSSL_PARAM_set_octet_ptr(p, prsactx->oaep_label, 0))
	388	return 0;
	389
	390	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL_LEN);
	391	if (p != NULL && !OSSL_PARAM_set_size_t(p, prsactx->oaep_labellen))
	392	return 0;
	393
d9a75107 MC	394	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
	395	if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->client_version))
	396	return 0;
	397
	398	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
	399	if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->alt_version))
	400	return 0;
	401
89abd1b6 MC	402	return 1;
	403	}
	404
	405	static const OSSL_PARAM known_gettable_ctx_params[] = {
	406	OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
31a796d1	407	OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
89abd1b6 MC	408	OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
	409	OSSL_PARAM_DEFN(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, OSSL_PARAM_OCTET_PTR,
	410	NULL, 0),
	411	OSSL_PARAM_size_t(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL_LEN, NULL),
d9a75107 MC	412	OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
d9a75107 MC	413	OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
89abd1b6 MC	414	OSSL_PARAM_END
	415	};
	416
1017ab21	417	static const OSSL_PARAM rsa_gettable_ctx_params(ossl_unused void provctx)
89abd1b6 MC	418	{
	419	return known_gettable_ctx_params;
	420	}
	421
	422	static int rsa_set_ctx_params(void *vprsactx, const OSSL_PARAM params[])
	423	{
	424	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
	425	const OSSL_PARAM *p;
c24937d5 RL	426	char mdname[OSSL_MAX_NAME_SIZE];
c24937d5 RL	427	char mdprops[OSSL_MAX_PROPQUERY_SIZE] = { '\0' };
89abd1b6	428	char *str = mdname;
89abd1b6 MC	429
	430	if (prsactx == NULL \|\| params == NULL)
	431	return 0;
	432
	433	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
	434	if (p != NULL) {
	435	if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
	436	return 0;
	437
	438	str = mdprops;
	439	p = OSSL_PARAM_locate_const(params,
	440	OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS);
	441	if (p != NULL) {
	442	if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
	443	return 0;
	444	}
	445
	446	EVP_MD_free(prsactx->oaep_md);
	447	prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, mdname, mdprops);
	448
	449	if (prsactx->oaep_md == NULL)
	450	return 0;
	451	}
	452
	453	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
	454	if (p != NULL) {
31a796d1 RL	455	int pad_mode = 0;
	456
	457	switch (p->data_type) {
	458	case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
	459	if (!OSSL_PARAM_get_int(p, &pad_mode))
	460	return 0;
	461	break;
	462	case OSSL_PARAM_UTF8_STRING:
	463	{
	464	int i;
	465
	466	if (p->data == NULL)
	467	return 0;
	468
	469	for (i = 0; padding_item[i].id != 0; i++) {
	470	if (strcmp(p->data, padding_item[i].ptr) == 0) {
	471	pad_mode = padding_item[i].id;
	472	break;
	473	}
	474	}
	475	}
	476	break;
	477	default:
89abd1b6	478	return 0;
31a796d1 RL	479	}
31a796d1 RL	480
89abd1b6 MC	481	/*
	482	* PSS padding is for signatures only so is not compatible with
	483	* asymmetric cipher use.
	484	*/
	485	if (pad_mode == RSA_PKCS1_PSS_PADDING)
	486	return 0;
	487	if (pad_mode == RSA_PKCS1_OAEP_PADDING && prsactx->oaep_md == NULL) {
	488	prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA1", mdprops);
	489	if (prsactx->oaep_md == NULL)
	490	return 0;
	491	}
	492	prsactx->pad_mode = pad_mode;
	493	}
	494
	495	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
	496	if (p != NULL) {
	497	if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
	498	return 0;
	499
	500	str = mdprops;
	501	p = OSSL_PARAM_locate_const(params,
	502	OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS);
	503	if (p != NULL) {
	504	if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
	505	return 0;
	506	} else {
	507	str = NULL;
	508	}
	509
	510	EVP_MD_free(prsactx->mgf1_md);
	511	prsactx->mgf1_md = EVP_MD_fetch(prsactx->libctx, mdname, str);
	512
	513	if (prsactx->mgf1_md == NULL)
	514	return 0;
	515	}
	516
	517	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
	518	if (p != NULL) {
	519	void *tmp_label = NULL;
	520	size_t tmp_labellen;
	521
	522	if (!OSSL_PARAM_get_octet_string(p, &tmp_label, 0, &tmp_labellen))
	523	return 0;
	524	OPENSSL_free(prsactx->oaep_label);
	525	prsactx->oaep_label = (unsigned char *)tmp_label;
	526	prsactx->oaep_labellen = tmp_labellen;
	527	}
	528
d9a75107 MC	529	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
	530	if (p != NULL) {
	531	unsigned int client_version;
	532
	533	if (!OSSL_PARAM_get_uint(p, &client_version))
	534	return 0;
	535	prsactx->client_version = client_version;
	536	}
	537
	538	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
	539	if (p != NULL) {
	540	unsigned int alt_version;
	541
	542	if (!OSSL_PARAM_get_uint(p, &alt_version))
	543	return 0;
	544	prsactx->alt_version = alt_version;
	545	}
	546
89abd1b6 MC	547	return 1;
	548	}
	549
	550	static const OSSL_PARAM known_settable_ctx_params[] = {
	551	OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
31a796d1	552	OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
89abd1b6 MC	553	OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
	554	OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS, NULL, 0),
	555	OSSL_PARAM_octet_string(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, NULL, 0),
d9a75107 MC	556	OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
d9a75107 MC	557	OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
89abd1b6 MC	558	OSSL_PARAM_END
	559	};
	560
1017ab21	561	static const OSSL_PARAM rsa_settable_ctx_params(ossl_unused void provctx)
89abd1b6 MC	562	{
	563	return known_settable_ctx_params;
	564	}
	565
1be63951	566	const OSSL_DISPATCH ossl_rsa_asym_cipher_functions[] = {
89abd1b6	567	{ OSSL_FUNC_ASYM_CIPHER_NEWCTX, (void (*)(void))rsa_newctx },
8d17cca5	568	{ OSSL_FUNC_ASYM_CIPHER_ENCRYPT_INIT, (void (*)(void))rsa_encrypt_init },
89abd1b6	569	{ OSSL_FUNC_ASYM_CIPHER_ENCRYPT, (void (*)(void))rsa_encrypt },
8d17cca5	570	{ OSSL_FUNC_ASYM_CIPHER_DECRYPT_INIT, (void (*)(void))rsa_decrypt_init },
89abd1b6 MC	571	{ OSSL_FUNC_ASYM_CIPHER_DECRYPT, (void (*)(void))rsa_decrypt },
	572	{ OSSL_FUNC_ASYM_CIPHER_FREECTX, (void (*)(void))rsa_freectx },
	573	{ OSSL_FUNC_ASYM_CIPHER_DUPCTX, (void (*)(void))rsa_dupctx },
	574	{ OSSL_FUNC_ASYM_CIPHER_GET_CTX_PARAMS,
	575	(void (*)(void))rsa_get_ctx_params },
	576	{ OSSL_FUNC_ASYM_CIPHER_GETTABLE_CTX_PARAMS,
	577	(void (*)(void))rsa_gettable_ctx_params },
	578	{ OSSL_FUNC_ASYM_CIPHER_SET_CTX_PARAMS,
	579	(void (*)(void))rsa_set_ctx_params },
	580	{ OSSL_FUNC_ASYM_CIPHER_SETTABLE_CTX_PARAMS,
	581	(void (*)(void))rsa_settable_ctx_params },
	582	{ 0, NULL }
	583	};