/src/openssl30/providers/implementations/asymciphers/rsa_enc.c

Source
/*
 * Copyright 2019-2026 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;
    size_t len = RSA_size(prsactx->rsa);
    int ret;

    if (!ossl_prov_is_running())
        return 0;

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

    if (out == NULL) {
        *outlen = len;
        return 1;
    }

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

    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;
    }

    if (dstctx->oaep_label != NULL
        && (dstctx->oaep_label = OPENSSL_memdup(dstctx->oaep_label, dstctx->oaep_labellen)) == NULL) {
        rsa_freectx(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: 2026-02-14 07:20

Line	Count	Source
1		/*
2		* Copyright 2019-2026 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	16.7k	{
82	16.7k	PROV_RSA_CTX *prsactx;
83
84	16.7k	if (!ossl_prov_is_running())
85	0	return NULL;
86	16.7k	prsactx = OPENSSL_zalloc(sizeof(PROV_RSA_CTX));
87	16.7k	if (prsactx == NULL)
88	0	return NULL;
89	16.7k	prsactx->libctx = PROV_LIBCTX_OF(provctx);
90
91	16.7k	return prsactx;
92	16.7k	}
93
94		static int rsa_init(void vprsactx, void vrsa, const OSSL_PARAM params[],
95		int operation)
96	5.19k	{
97	5.19k	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
98
99	5.19k	if (!ossl_prov_is_running() \|\| prsactx == NULL \|\| vrsa == NULL)
100	0	return 0;
101
102	5.19k	if (!ossl_rsa_check_key(prsactx->libctx, vrsa, operation))
103	0	return 0;
104
105	5.19k	if (!RSA_up_ref(vrsa))
106	0	return 0;
107	5.19k	RSA_free(prsactx->rsa);
108	5.19k	prsactx->rsa = vrsa;
109	5.19k	prsactx->operation = operation;
110
111	5.19k	switch (RSA_test_flags(prsactx->rsa, RSA_FLAG_TYPE_MASK)) {
112	5.19k	case RSA_FLAG_TYPE_RSA:
113	5.19k	prsactx->pad_mode = RSA_PKCS1_PADDING;
114	5.19k	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	5.19k	}
120	5.19k	return rsa_set_ctx_params(prsactx, params);
121	5.19k	}
122
123		static int rsa_encrypt_init(void vprsactx, void vrsa,
124		const OSSL_PARAM params[])
125	6.26k	{
126	6.26k	return rsa_init(vprsactx, vrsa, params, EVP_PKEY_OP_ENCRYPT);
127	6.26k	}
128
129		static int rsa_decrypt_init(void vprsactx, void vrsa,
130		const OSSL_PARAM params[])
131	10.4k	{
132	10.4k	return rsa_init(vprsactx, vrsa, params, EVP_PKEY_OP_DECRYPT);
133	10.4k	}
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	12.5k	{
138	12.5k	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
139	12.5k	size_t len = RSA_size(prsactx->rsa);
140	12.5k	int ret;
141
142	12.5k	if (!ossl_prov_is_running())
143	0	return 0;
144
145	12.5k	if (len == 0) {
146	8	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
147	8	return 0;
148	8	}
149
150	12.5k	if (out == NULL) {
151	6.25k	*outlen = len;
152	6.25k	return 1;
153	6.25k	}
154
155	6.25k	if (outsize < len) {
156	0	ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
157	0	return 0;
158	0	}
159
160	6.25k	if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
161	0	int rsasize = RSA_size(prsactx->rsa);
162	0	unsigned char *tbuf;
163
164	0	if ((tbuf = OPENSSL_malloc(rsasize)) == NULL) {
165	0	ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
166	0	return 0;
167	0	}
168	0	if (prsactx->oaep_md == NULL) {
169	0	prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
170	0	if (prsactx->oaep_md == NULL) {
171	0	OPENSSL_free(tbuf);
172	0	ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
173	0	return 0;
174	0	}
175	0	}
176	0	ret = ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex(prsactx->libctx, tbuf,
177	0	rsasize, in, inlen,
178	0	prsactx->oaep_label,
179	0	prsactx->oaep_labellen,
180	0	prsactx->oaep_md,
181	0	prsactx->mgf1_md);
182
183	0	if (!ret) {
184	0	OPENSSL_free(tbuf);
185	0	return 0;
186	0	}
187	0	ret = RSA_public_encrypt(rsasize, tbuf, out, prsactx->rsa,
188	0	RSA_NO_PADDING);
189	0	OPENSSL_free(tbuf);
190	6.25k	} else {
191	6.25k	ret = RSA_public_encrypt(inlen, in, out, prsactx->rsa,
192	6.25k	prsactx->pad_mode);
193	6.25k	}
194		/* A ret value of 0 is not an error */
195	6.25k	if (ret < 0)
196	734	return ret;
197	5.52k	*outlen = ret;
198	5.52k	return 1;
199	6.25k	}
200
201		static int rsa_decrypt(void vprsactx, unsigned char out, size_t *outlen,
202		size_t outsize, const unsigned char *in, size_t inlen)
203	538	{
204	538	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
205	538	int ret;
206	538	size_t len = RSA_size(prsactx->rsa);
207
208	538	if (!ossl_prov_is_running())
209	0	return 0;
210
211	538	if (prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
212	538	if (out == NULL) {
213	0	*outlen = SSL_MAX_MASTER_KEY_LENGTH;
214	0	return 1;
215	0	}
216	538	if (outsize < SSL_MAX_MASTER_KEY_LENGTH) {
217	0	ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
218	0	return 0;
219	0	}
220	538	} else {
221	0	if (out == NULL) {
222	0	if (len == 0) {
223	0	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
224	0	return 0;
225	0	}
226	0	*outlen = len;
227	0	return 1;
228	0	}
229
230	0	if (outsize < len) {
231	0	ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
232	0	return 0;
233	0	}
234	0	}
235
236	538	if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING
237	538	\|\| prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
238	538	unsigned char *tbuf;
239
240	538	if ((tbuf = OPENSSL_malloc(len)) == NULL) {
241	0	ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
242	0	return 0;
243	0	}
244	538	ret = RSA_private_decrypt(inlen, in, tbuf, prsactx->rsa,
245	538	RSA_NO_PADDING);
246		/*
247		* With no padding then, on success ret should be len, otherwise an
248		* error occurred (non-constant time)
249		*/
250	538	if (ret != (int)len) {
251	1	OPENSSL_free(tbuf);
252	1	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_DECRYPT);
253	1	return 0;
254	1	}
255	537	if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
256	0	if (prsactx->oaep_md == NULL) {
257	0	prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
258	0	if (prsactx->oaep_md == NULL) {
259	0	OPENSSL_free(tbuf);
260	0	ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
261	0	return 0;
262	0	}
263	0	}
264	0	ret = RSA_padding_check_PKCS1_OAEP_mgf1(out, outsize, tbuf,
265	0	len, len,
266	0	prsactx->oaep_label,
267	0	prsactx->oaep_labellen,
268	0	prsactx->oaep_md,
269	0	prsactx->mgf1_md);
270	537	} else {
271		/* RSA_PKCS1_WITH_TLS_PADDING */
272	537	if (prsactx->client_version <= 0) {
273	0	ERR_raise(ERR_LIB_PROV, PROV_R_BAD_TLS_CLIENT_VERSION);
274	0	OPENSSL_free(tbuf);
275	0	return 0;
276	0	}
277	537	ret = ossl_rsa_padding_check_PKCS1_type_2_TLS(
278	537	prsactx->libctx, out, outsize, tbuf, len,
279	537	prsactx->client_version, prsactx->alt_version);
280	537	}
281	537	OPENSSL_free(tbuf);
282	537	} else {
283	0	ret = RSA_private_decrypt(inlen, in, out, prsactx->rsa,
284	0	prsactx->pad_mode);
285	0	}
286	537	outlen = constant_time_select_s(constant_time_msb_s(ret), outlen, ret);
287	537	ret = constant_time_select_int(constant_time_msb(ret), 0, 1);
288	537	return ret;
289	538	}
290
291		static void rsa_freectx(void *vprsactx)
292	16.7k	{
293	16.7k	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
294
295	16.7k	RSA_free(prsactx->rsa);
296
297	16.7k	EVP_MD_free(prsactx->oaep_md);
298	16.7k	EVP_MD_free(prsactx->mgf1_md);
299	16.7k	OPENSSL_free(prsactx->oaep_label);
300
301	16.7k	OPENSSL_free(prsactx);
302	16.7k	}
303
304		static void rsa_dupctx(void vprsactx)
305	0	{
306	0	PROV_RSA_CTX srcctx = (PROV_RSA_CTX )vprsactx;
307	0	PROV_RSA_CTX *dstctx;
308
309	0	if (!ossl_prov_is_running())
310	0	return NULL;
311
312	0	dstctx = OPENSSL_zalloc(sizeof(*srcctx));
313	0	if (dstctx == NULL)
314	0	return NULL;
315
316	0	dstctx = srcctx;
317	0	if (dstctx->rsa != NULL && !RSA_up_ref(dstctx->rsa)) {
318	0	OPENSSL_free(dstctx);
319	0	return NULL;
320	0	}
321
322	0	if (dstctx->oaep_md != NULL && !EVP_MD_up_ref(dstctx->oaep_md)) {
323	0	RSA_free(dstctx->rsa);
324	0	OPENSSL_free(dstctx);
325	0	return NULL;
326	0	}
327
328	0	if (dstctx->mgf1_md != NULL && !EVP_MD_up_ref(dstctx->mgf1_md)) {
329	0	RSA_free(dstctx->rsa);
330	0	EVP_MD_free(dstctx->oaep_md);
331	0	OPENSSL_free(dstctx);
332	0	return NULL;
333	0	}
334
335	0	if (dstctx->oaep_label != NULL
336	0	&& (dstctx->oaep_label = OPENSSL_memdup(dstctx->oaep_label, dstctx->oaep_labellen)) == NULL) {
337	0	rsa_freectx(dstctx);
338	0	return NULL;
339	0	}
340
341	0	return dstctx;
342	0	}
343
344		static int rsa_get_ctx_params(void vprsactx, OSSL_PARAM params)
345	0	{
346	0	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
347	0	OSSL_PARAM *p;
348
349	0	if (prsactx == NULL)
350	0	return 0;
351
352	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
353	0	if (p != NULL)
354	0	switch (p->data_type) {
355	0	case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
356	0	if (!OSSL_PARAM_set_int(p, prsactx->pad_mode))
357	0	return 0;
358	0	break;
359	0	case OSSL_PARAM_UTF8_STRING: {
360	0	int i;
361	0	const char *word = NULL;
362
363	0	for (i = 0; padding_item[i].id != 0; i++) {
364	0	if (prsactx->pad_mode == (int)padding_item[i].id) {
365	0	word = padding_item[i].ptr;
366	0	break;
367	0	}
368	0	}
369
370	0	if (word != NULL) {
371	0	if (!OSSL_PARAM_set_utf8_string(p, word))
372	0	return 0;
373	0	} else {
374	0	ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
375	0	}
376	0	} break;
377	0	default:
378	0	return 0;
379	0	}
380
381	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
382	0	if (p != NULL && !OSSL_PARAM_set_utf8_string(p, prsactx->oaep_md == NULL ? "" : EVP_MD_get0_name(prsactx->oaep_md)))
383	0	return 0;
384
385	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
386	0	if (p != NULL) {
387	0	EVP_MD *mgf1_md = prsactx->mgf1_md == NULL ? prsactx->oaep_md
388	0	: prsactx->mgf1_md;
389
390	0	if (!OSSL_PARAM_set_utf8_string(p, mgf1_md == NULL ? "" : EVP_MD_get0_name(mgf1_md)))
391	0	return 0;
392	0	}
393
394	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
395	0	if (p != NULL && !OSSL_PARAM_set_octet_ptr(p, prsactx->oaep_label, prsactx->oaep_labellen))
396	0	return 0;
397
398	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
399	0	if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->client_version))
400	0	return 0;
401
402	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
403	0	if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->alt_version))
404	0	return 0;
405
406	0	return 1;
407	0	}
408
409		static const OSSL_PARAM known_gettable_ctx_params[] = {
410		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
411		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
412		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
413		OSSL_PARAM_DEFN(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, OSSL_PARAM_OCTET_PTR,
414		NULL, 0),
415		OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
416		OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
417		OSSL_PARAM_END
418		};
419
420		static const OSSL_PARAM rsa_gettable_ctx_params(ossl_unused void vprsactx,
421		ossl_unused void *provctx)
422	0	{
423	0	return known_gettable_ctx_params;
424	0	}
425
426		static int rsa_set_ctx_params(void *vprsactx, const OSSL_PARAM params[])
427	1.91k	{
428	1.91k	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
429	1.91k	const OSSL_PARAM *p;
430	1.91k	char mdname[OSSL_MAX_NAME_SIZE];
431	1.91k	char mdprops[OSSL_MAX_PROPQUERY_SIZE] = { '\0' };
432	1.91k	char *str = NULL;
433
434	1.91k	if (prsactx == NULL)
435	0	return 0;
436	1.91k	if (params == NULL)
437	840	return 1;
438
439	1.07k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
440	1.07k	if (p != NULL) {
441	0	str = mdname;
442	0	if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
443	0	return 0;
444
445	0	p = OSSL_PARAM_locate_const(params,
446	0	OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS);
447	0	if (p != NULL) {
448	0	str = mdprops;
449	0	if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
450	0	return 0;
451	0	}
452
453	0	EVP_MD_free(prsactx->oaep_md);
454	0	prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, mdname, mdprops);
455
456	0	if (prsactx->oaep_md == NULL)
457	0	return 0;
458	0	}
459
460	1.07k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
461	1.07k	if (p != NULL) {
462	538	int pad_mode = 0;
463
464	538	switch (p->data_type) {
465	538	case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
466	538	if (!OSSL_PARAM_get_int(p, &pad_mode))
467	0	return 0;
468	538	break;
469	538	case OSSL_PARAM_UTF8_STRING: {
470	0	int i;
471
472	0	if (p->data == NULL)
473	0	return 0;
474
475	0	for (i = 0; padding_item[i].id != 0; i++) {
476	0	if (strcmp(p->data, padding_item[i].ptr) == 0) {
477	0	pad_mode = padding_item[i].id;
478	0	break;
479	0	}
480	0	}
481	0	} break;
482	0	default:
483	0	return 0;
484	538	}
485
486		/*
487		* PSS padding is for signatures only so is not compatible with
488		* asymmetric cipher use.
489		*/
490	538	if (pad_mode == RSA_PKCS1_PSS_PADDING)
491	0	return 0;
492	538	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	538	prsactx->pad_mode = pad_mode;
498	538	}
499
500	1.07k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
501	1.07k	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	1.07k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
524	1.07k	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	1.07k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
536	1.07k	if (p != NULL) {
537	538	unsigned int client_version;
538
539	538	if (!OSSL_PARAM_get_uint(p, &client_version))
540	0	return 0;
541	538	prsactx->client_version = client_version;
542	538	}
543
544	1.07k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
545	1.07k	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	1.07k	return 1;
554	1.07k	}
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	10.5k	{
571	10.5k	return known_settable_ctx_params;
572	10.5k	}
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		};