/src/openssl31/providers/implementations/asymciphers/rsa_enc.c

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/*
 * Copyright 2019-2023 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>
#include <openssl/proverr.h>
/* Just for SSL_MAX_MASTER_KEY_LENGTH */
#include <openssl/prov_ssl.h>
#include "internal/constant_time.h"
#include "internal/sizes.h"
#include "crypto/rsa.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_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 {
    OSSL_LIB_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_LIBCTX_OF(provctx);

    return prsactx;
}

static int rsa_init(void *vprsactx, void *vrsa, const OSSL_PARAM params[],
                    int operation)
{
    PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;

    if (!ossl_prov_is_running() || prsactx == NULL || vrsa == NULL)
        return 0;

    if (!ossl_rsa_check_key(prsactx->libctx, vrsa, operation))
        return 0;

    if (!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:
        /* This should not happen due to the check above */
        ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
        return 0;
    }
    return rsa_set_ctx_params(prsactx, params);
}

static int rsa_encrypt_init(void *vprsactx, void *vrsa,
                            const OSSL_PARAM params[])
{
    return rsa_init(vprsactx, vrsa, params, EVP_PKEY_OP_ENCRYPT);
}

static int rsa_decrypt_init(void *vprsactx, void *vrsa,
                            const OSSL_PARAM params[])
{
    return rsa_init(vprsactx, vrsa, params, 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) {
            ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
            return 0;
        }
        if (prsactx->oaep_md == NULL) {
            prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
            if (prsactx->oaep_md == NULL) {
                OPENSSL_free(tbuf);
                ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
                return 0;
            }
        }
        ret =
            ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex(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) {
            ERR_raise(ERR_LIB_PROV, 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) {
                    OPENSSL_free(tbuf);
                    ERR_raise(ERR_LIB_PROV, 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);
                OPENSSL_free(tbuf);
                return 0;
            }
            ret = ossl_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)
        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_get0_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_get0_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,
                                  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_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 *vprsactx,
                                                 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 = NULL;

    if (prsactx == NULL)
        return 0;
    if (params == NULL)
        return 1;

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

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

        p = OSSL_PARAM_locate_const(params,
                                    OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS);
        if (p != NULL) {
            str = mdprops;
            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_OAEP_DIGEST_PROPS, 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 *vprsactx,
                                                 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 }
};

Coverage Report

Created: 2025-06-13 06:58

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 2019-2023 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		* RSA low level APIs are deprecated for public use, but still ok for
12		* internal use.
13		*/
14		#include "internal/deprecated.h"
15
16		#include <openssl/crypto.h>
17		#include <openssl/evp.h>
18		#include <openssl/core_dispatch.h>
19		#include <openssl/core_names.h>
20		#include <openssl/rsa.h>
21		#include <openssl/params.h>
22		#include <openssl/err.h>
23		#include <openssl/proverr.h>
24		/* Just for SSL_MAX_MASTER_KEY_LENGTH */
25		#include <openssl/prov_ssl.h>
26		#include "internal/constant_time.h"
27		#include "internal/sizes.h"
28		#include "crypto/rsa.h"
29		#include "prov/provider_ctx.h"
30		#include "prov/implementations.h"
31		#include "prov/providercommon.h"
32		#include "prov/securitycheck.h"
33
34		#include <stdlib.h>
35
36		static OSSL_FUNC_asym_cipher_newctx_fn rsa_newctx;
37		static OSSL_FUNC_asym_cipher_encrypt_init_fn rsa_encrypt_init;
38		static OSSL_FUNC_asym_cipher_encrypt_fn rsa_encrypt;
39		static OSSL_FUNC_asym_cipher_decrypt_init_fn rsa_decrypt_init;
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;
47
48		static OSSL_ITEM padding_item[] = {
49		{ RSA_PKCS1_PADDING, OSSL_PKEY_RSA_PAD_MODE_PKCSV15 },
50		{ RSA_NO_PADDING, OSSL_PKEY_RSA_PAD_MODE_NONE },
51		{ RSA_PKCS1_OAEP_PADDING, OSSL_PKEY_RSA_PAD_MODE_OAEP }, /* Correct spelling first */
52		{ RSA_PKCS1_OAEP_PADDING, "oeap" },
53		{ RSA_X931_PADDING, OSSL_PKEY_RSA_PAD_MODE_X931 },
54		{ 0, NULL }
55		};
56
57		/*
58		* What's passed as an actual key is defined by the KEYMGMT interface.
59		* We happen to know that our KEYMGMT simply passes RSA structures, so
60		* we use that here too.
61		*/
62
63		typedef struct {
64		OSSL_LIB_CTX *libctx;
65		RSA *rsa;
66		int pad_mode;
67		int operation;
68		/* OAEP message digest */
69		EVP_MD *oaep_md;
70		/* message digest for MGF1 */
71		EVP_MD *mgf1_md;
72		/* OAEP label */
73		unsigned char *oaep_label;
74		size_t oaep_labellen;
75		/* TLS padding */
76		unsigned int client_version;
77		unsigned int alt_version;
78		} PROV_RSA_CTX;
79
80		static void rsa_newctx(void provctx)
81	6.96k	{
82	6.96k	PROV_RSA_CTX *prsactx;
83
84	6.96k	if (!ossl_prov_is_running())
85	0	return NULL;
86	6.96k	prsactx = OPENSSL_zalloc(sizeof(PROV_RSA_CTX));
87	6.96k	if (prsactx == NULL)
88	0	return NULL;
89	6.96k	prsactx->libctx = PROV_LIBCTX_OF(provctx);
90
91	6.96k	return prsactx;
92	6.96k	}
93
94		static int rsa_init(void vprsactx, void vrsa, const OSSL_PARAM params[],
95		int operation)
96	4.09k	{
97	4.09k	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
98
99	4.09k	if (!ossl_prov_is_running() \|\| prsactx == NULL \|\| vrsa == NULL)
100	0	return 0;
101
102	4.09k	if (!ossl_rsa_check_key(prsactx->libctx, vrsa, operation))
103	0	return 0;
104
105	4.09k	if (!RSA_up_ref(vrsa))
106	0	return 0;
107	4.09k	RSA_free(prsactx->rsa);
108	4.09k	prsactx->rsa = vrsa;
109	4.09k	prsactx->operation = operation;
110
111	4.09k	switch (RSA_test_flags(prsactx->rsa, RSA_FLAG_TYPE_MASK)) {
112	4.09k	case RSA_FLAG_TYPE_RSA:
113	4.09k	prsactx->pad_mode = RSA_PKCS1_PADDING;
114	4.09k	break;
115	0	default:
116		/* This should not happen due to the check above */
117	0	ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
118	0	return 0;
119	4.09k	}
120	4.09k	return rsa_set_ctx_params(prsactx, params);
121	4.09k	}
122
123		static int rsa_encrypt_init(void vprsactx, void vrsa,
124		const OSSL_PARAM params[])
125	1.36k	{
126	1.36k	return rsa_init(vprsactx, vrsa, params, EVP_PKEY_OP_ENCRYPT);
127	1.36k	}
128
129		static int rsa_decrypt_init(void vprsactx, void vrsa,
130		const OSSL_PARAM params[])
131	5.60k	{
132	5.60k	return rsa_init(vprsactx, vrsa, params, EVP_PKEY_OP_DECRYPT);
133	5.60k	}
134
135		static int rsa_encrypt(void vprsactx, unsigned char out, size_t *outlen,
136		size_t outsize, const unsigned char *in, size_t inlen)
137	2.71k	{
138	2.71k	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
139	2.71k	int ret;
140
141	2.71k	if (!ossl_prov_is_running())
142	0	return 0;
143
144	2.71k	if (out == NULL) {
145	1.36k	size_t len = RSA_size(prsactx->rsa);
146
147	1.36k	if (len == 0) {
148	4	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
149	4	return 0;
150	4	}
151	1.35k	*outlen = len;
152	1.35k	return 1;
153	1.36k	}
154
155	1.35k	if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
156	0	int rsasize = RSA_size(prsactx->rsa);
157	0	unsigned char *tbuf;
158
159	0	if ((tbuf = OPENSSL_malloc(rsasize)) == NULL) {
160	0	ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
161	0	return 0;
162	0	}
163	0	if (prsactx->oaep_md == NULL) {
164	0	prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
165	0	if (prsactx->oaep_md == NULL) {
166	0	OPENSSL_free(tbuf);
167	0	ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
168	0	return 0;
169	0	}
170	0	}
171	0	ret =
172	0	ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex(prsactx->libctx, tbuf,
173	0	rsasize, in, inlen,
174	0	prsactx->oaep_label,
175	0	prsactx->oaep_labellen,
176	0	prsactx->oaep_md,
177	0	prsactx->mgf1_md);
178
179	0	if (!ret) {
180	0	OPENSSL_free(tbuf);
181	0	return 0;
182	0	}
183	0	ret = RSA_public_encrypt(rsasize, tbuf, out, prsactx->rsa,
184	0	RSA_NO_PADDING);
185	0	OPENSSL_free(tbuf);
186	1.35k	} else {
187	1.35k	ret = RSA_public_encrypt(inlen, in, out, prsactx->rsa,
188	1.35k	prsactx->pad_mode);
189	1.35k	}
190		/* A ret value of 0 is not an error */
191	1.35k	if (ret < 0)
192	266	return ret;
193	1.09k	*outlen = ret;
194	1.09k	return 1;
195	1.35k	}
196
197		static int rsa_decrypt(void vprsactx, unsigned char out, size_t *outlen,
198		size_t outsize, const unsigned char *in, size_t inlen)
199	1.78k	{
200	1.78k	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
201	1.78k	int ret;
202	1.78k	size_t len = RSA_size(prsactx->rsa);
203
204	1.78k	if (!ossl_prov_is_running())
205	0	return 0;
206
207	1.78k	if (prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
208	1.78k	if (out == NULL) {
209	0	*outlen = SSL_MAX_MASTER_KEY_LENGTH;
210	0	return 1;
211	0	}
212	1.78k	if (outsize < SSL_MAX_MASTER_KEY_LENGTH) {
213	0	ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
214	0	return 0;
215	0	}
216	1.78k	} else {
217	0	if (out == NULL) {
218	0	if (len == 0) {
219	0	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
220	0	return 0;
221	0	}
222	0	*outlen = len;
223	0	return 1;
224	0	}
225
226	0	if (outsize < len) {
227	0	ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
228	0	return 0;
229	0	}
230	0	}
231
232	1.78k	if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING
233	1.78k	\|\| prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
234	1.78k	unsigned char *tbuf;
235
236	1.78k	if ((tbuf = OPENSSL_malloc(len)) == NULL) {
237	0	ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
238	0	return 0;
239	0	}
240	1.78k	ret = RSA_private_decrypt(inlen, in, tbuf, prsactx->rsa,
241	1.78k	RSA_NO_PADDING);
242		/*
243		* With no padding then, on success ret should be len, otherwise an
244		* error occurred (non-constant time)
245		*/
246	1.78k	if (ret != (int)len) {
247	6	OPENSSL_free(tbuf);
248	6	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_DECRYPT);
249	6	return 0;
250	6	}
251	1.77k	if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
252	0	if (prsactx->oaep_md == NULL) {
253	0	prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
254	0	if (prsactx->oaep_md == NULL) {
255	0	OPENSSL_free(tbuf);
256	0	ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
257	0	return 0;
258	0	}
259	0	}
260	0	ret = RSA_padding_check_PKCS1_OAEP_mgf1(out, outsize, tbuf,
261	0	len, len,
262	0	prsactx->oaep_label,
263	0	prsactx->oaep_labellen,
264	0	prsactx->oaep_md,
265	0	prsactx->mgf1_md);
266	1.77k	} else {
267		/* RSA_PKCS1_WITH_TLS_PADDING */
268	1.77k	if (prsactx->client_version <= 0) {
269	0	ERR_raise(ERR_LIB_PROV, PROV_R_BAD_TLS_CLIENT_VERSION);
270	0	OPENSSL_free(tbuf);
271	0	return 0;
272	0	}
273	1.77k	ret = ossl_rsa_padding_check_PKCS1_type_2_TLS(
274	1.77k	prsactx->libctx, out, outsize, tbuf, len,
275	1.77k	prsactx->client_version, prsactx->alt_version);
276	1.77k	}
277	1.77k	OPENSSL_free(tbuf);
278	1.77k	} else {
279	0	ret = RSA_private_decrypt(inlen, in, out, prsactx->rsa,
280	0	prsactx->pad_mode);
281	0	}
282	1.77k	outlen = constant_time_select_s(constant_time_msb_s(ret), outlen, ret);
283	1.77k	ret = constant_time_select_int(constant_time_msb(ret), 0, 1);
284	1.77k	return ret;
285	1.78k	}
286
287		static void rsa_freectx(void *vprsactx)
288	6.96k	{
289	6.96k	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
290
291	6.96k	RSA_free(prsactx->rsa);
292
293	6.96k	EVP_MD_free(prsactx->oaep_md);
294	6.96k	EVP_MD_free(prsactx->mgf1_md);
295	6.96k	OPENSSL_free(prsactx->oaep_label);
296
297	6.96k	OPENSSL_free(prsactx);
298	6.96k	}
299
300		static void rsa_dupctx(void vprsactx)
301	0	{
302	0	PROV_RSA_CTX srcctx = (PROV_RSA_CTX )vprsactx;
303	0	PROV_RSA_CTX *dstctx;
304
305	0	if (!ossl_prov_is_running())
306	0	return NULL;
307
308	0	dstctx = OPENSSL_zalloc(sizeof(*srcctx));
309	0	if (dstctx == NULL)
310	0	return NULL;
311
312	0	dstctx = srcctx;
313	0	if (dstctx->rsa != NULL && !RSA_up_ref(dstctx->rsa)) {
314	0	OPENSSL_free(dstctx);
315	0	return NULL;
316	0	}
317
318	0	if (dstctx->oaep_md != NULL && !EVP_MD_up_ref(dstctx->oaep_md)) {
319	0	RSA_free(dstctx->rsa);
320	0	OPENSSL_free(dstctx);
321	0	return NULL;
322	0	}
323
324	0	if (dstctx->mgf1_md != NULL && !EVP_MD_up_ref(dstctx->mgf1_md)) {
325	0	RSA_free(dstctx->rsa);
326	0	EVP_MD_free(dstctx->oaep_md);
327	0	OPENSSL_free(dstctx);
328	0	return NULL;
329	0	}
330
331	0	return dstctx;
332	0	}
333
334		static int rsa_get_ctx_params(void vprsactx, OSSL_PARAM params)
335	0	{
336	0	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
337	0	OSSL_PARAM *p;
338
339	0	if (prsactx == NULL)
340	0	return 0;
341
342	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
343	0	if (p != NULL)
344	0	switch (p->data_type) {
345	0	case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
346	0	if (!OSSL_PARAM_set_int(p, prsactx->pad_mode))
347	0	return 0;
348	0	break;
349	0	case OSSL_PARAM_UTF8_STRING:
350	0	{
351	0	int i;
352	0	const char *word = NULL;
353
354	0	for (i = 0; padding_item[i].id != 0; i++) {
355	0	if (prsactx->pad_mode == (int)padding_item[i].id) {
356	0	word = padding_item[i].ptr;
357	0	break;
358	0	}
359	0	}
360
361	0	if (word != NULL) {
362	0	if (!OSSL_PARAM_set_utf8_string(p, word))
363	0	return 0;
364	0	} else {
365	0	ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
366	0	}
367	0	}
368	0	break;
369	0	default:
370	0	return 0;
371	0	}
372
373	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
374	0	if (p != NULL && !OSSL_PARAM_set_utf8_string(p, prsactx->oaep_md == NULL
375	0	? ""
376	0	: EVP_MD_get0_name(prsactx->oaep_md)))
377	0	return 0;
378
379	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
380	0	if (p != NULL) {
381	0	EVP_MD *mgf1_md = prsactx->mgf1_md == NULL ? prsactx->oaep_md
382	0	: prsactx->mgf1_md;
383
384	0	if (!OSSL_PARAM_set_utf8_string(p, mgf1_md == NULL
385	0	? ""
386	0	: EVP_MD_get0_name(mgf1_md)))
387	0	return 0;
388	0	}
389
390	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
391	0	if (p != NULL &&
392	0	!OSSL_PARAM_set_octet_ptr(p, prsactx->oaep_label,
393	0	prsactx->oaep_labellen))
394	0	return 0;
395
396	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
397	0	if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->client_version))
398	0	return 0;
399
400	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
401	0	if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->alt_version))
402	0	return 0;
403
404	0	return 1;
405	0	}
406
407		static const OSSL_PARAM known_gettable_ctx_params[] = {
408		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
409		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
410		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
411		OSSL_PARAM_DEFN(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, OSSL_PARAM_OCTET_PTR,
412		NULL, 0),
413		OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
414		OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
415		OSSL_PARAM_END
416		};
417
418		static const OSSL_PARAM rsa_gettable_ctx_params(ossl_unused void vprsactx,
419		ossl_unused void *provctx)
420	0	{
421	0	return known_gettable_ctx_params;
422	0	}
423
424		static int rsa_set_ctx_params(void *vprsactx, const OSSL_PARAM params[])
425	5.97k	{
426	5.97k	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
427	5.97k	const OSSL_PARAM *p;
428	5.97k	char mdname[OSSL_MAX_NAME_SIZE];
429	5.97k	char mdprops[OSSL_MAX_PROPQUERY_SIZE] = { '\0' };
430	5.97k	char *str = NULL;
431
432	5.97k	if (prsactx == NULL)
433	0	return 0;
434	5.97k	if (params == NULL)
435	2.41k	return 1;
436
437	3.56k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
438	3.56k	if (p != NULL) {
439	0	str = mdname;
440	0	if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
441	0	return 0;
442
443	0	p = OSSL_PARAM_locate_const(params,
444	0	OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS);
445	0	if (p != NULL) {
446	0	str = mdprops;
447	0	if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
448	0	return 0;
449	0	}
450
451	0	EVP_MD_free(prsactx->oaep_md);
452	0	prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, mdname, mdprops);
453
454	0	if (prsactx->oaep_md == NULL)
455	0	return 0;
456	0	}
457
458	3.56k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
459	3.56k	if (p != NULL) {
460	1.78k	int pad_mode = 0;
461
462	1.78k	switch (p->data_type) {
463	1.78k	case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
464	1.78k	if (!OSSL_PARAM_get_int(p, &pad_mode))
465	0	return 0;
466	1.78k	break;
467	1.78k	case OSSL_PARAM_UTF8_STRING:
468	0	{
469	0	int i;
470
471	0	if (p->data == NULL)
472	0	return 0;
473
474	0	for (i = 0; padding_item[i].id != 0; i++) {
475	0	if (strcmp(p->data, padding_item[i].ptr) == 0) {
476	0	pad_mode = padding_item[i].id;
477	0	break;
478	0	}
479	0	}
480	0	}
481	0	break;
482	0	default:
483	0	return 0;
484	1.78k	}
485
486		/*
487		* PSS padding is for signatures only so is not compatible with
488		* asymmetric cipher use.
489		*/
490	1.78k	if (pad_mode == RSA_PKCS1_PSS_PADDING)
491	0	return 0;
492	1.78k	if (pad_mode == RSA_PKCS1_OAEP_PADDING && prsactx->oaep_md == NULL) {
493	0	prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA1", mdprops);
494	0	if (prsactx->oaep_md == NULL)
495	0	return 0;
496	0	}
497	1.78k	prsactx->pad_mode = pad_mode;
498	1.78k	}
499
500	3.56k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
501	3.56k	if (p != NULL) {
502	0	str = mdname;
503	0	if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
504	0	return 0;
505
506	0	p = OSSL_PARAM_locate_const(params,
507	0	OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS);
508	0	if (p != NULL) {
509	0	str = mdprops;
510	0	if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
511	0	return 0;
512	0	} else {
513	0	str = NULL;
514	0	}
515
516	0	EVP_MD_free(prsactx->mgf1_md);
517	0	prsactx->mgf1_md = EVP_MD_fetch(prsactx->libctx, mdname, str);
518
519	0	if (prsactx->mgf1_md == NULL)
520	0	return 0;
521	0	}
522
523	3.56k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
524	3.56k	if (p != NULL) {
525	0	void *tmp_label = NULL;
526	0	size_t tmp_labellen;
527
528	0	if (!OSSL_PARAM_get_octet_string(p, &tmp_label, 0, &tmp_labellen))
529	0	return 0;
530	0	OPENSSL_free(prsactx->oaep_label);
531	0	prsactx->oaep_label = (unsigned char *)tmp_label;
532	0	prsactx->oaep_labellen = tmp_labellen;
533	0	}
534
535	3.56k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
536	3.56k	if (p != NULL) {
537	1.78k	unsigned int client_version;
538
539	1.78k	if (!OSSL_PARAM_get_uint(p, &client_version))
540	0	return 0;
541	1.78k	prsactx->client_version = client_version;
542	1.78k	}
543
544	3.56k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
545	3.56k	if (p != NULL) {
546	0	unsigned int alt_version;
547
548	0	if (!OSSL_PARAM_get_uint(p, &alt_version))
549	0	return 0;
550	0	prsactx->alt_version = alt_version;
551	0	}
552
553	3.56k	return 1;
554	3.56k	}
555
556		static const OSSL_PARAM known_settable_ctx_params[] = {
557		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
558		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS, NULL, 0),
559		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
560		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
561		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS, NULL, 0),
562		OSSL_PARAM_octet_string(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, NULL, 0),
563		OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
564		OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
565		OSSL_PARAM_END
566		};
567
568		static const OSSL_PARAM rsa_settable_ctx_params(ossl_unused void vprsactx,
569		ossl_unused void *provctx)
570	5.61k	{
571	5.61k	return known_settable_ctx_params;
572	5.61k	}
573
574		const OSSL_DISPATCH ossl_rsa_asym_cipher_functions[] = {
575		{ OSSL_FUNC_ASYM_CIPHER_NEWCTX, (void (*)(void))rsa_newctx },
576		{ OSSL_FUNC_ASYM_CIPHER_ENCRYPT_INIT, (void (*)(void))rsa_encrypt_init },
577		{ OSSL_FUNC_ASYM_CIPHER_ENCRYPT, (void (*)(void))rsa_encrypt },
578		{ OSSL_FUNC_ASYM_CIPHER_DECRYPT_INIT, (void (*)(void))rsa_decrypt_init },
579		{ OSSL_FUNC_ASYM_CIPHER_DECRYPT, (void (*)(void))rsa_decrypt },
580		{ OSSL_FUNC_ASYM_CIPHER_FREECTX, (void (*)(void))rsa_freectx },
581		{ OSSL_FUNC_ASYM_CIPHER_DUPCTX, (void (*)(void))rsa_dupctx },
582		{ OSSL_FUNC_ASYM_CIPHER_GET_CTX_PARAMS,
583		(void (*)(void))rsa_get_ctx_params },
584		{ OSSL_FUNC_ASYM_CIPHER_GETTABLE_CTX_PARAMS,
585		(void (*)(void))rsa_gettable_ctx_params },
586		{ OSSL_FUNC_ASYM_CIPHER_SET_CTX_PARAMS,
587		(void (*)(void))rsa_set_ctx_params },
588		{ OSSL_FUNC_ASYM_CIPHER_SETTABLE_CTX_PARAMS,
589		(void (*)(void))rsa_settable_ctx_params },
590		{ 0, NULL }
591		};