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

Source
/*
 * Copyright 2019-2025 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

/*
 * 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;
    }

    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: 2025-11-16 06:40

Line	Count	Source
1		/*
2		* Copyright 2019-2025 The OpenSSL Project Authors. All Rights Reserved.
3		*
4		* Licensed under the Apache License 2.0 (the "License"). You may not use
5		* this file except in compliance with the License. You can obtain a copy
6		* in the file LICENSE in the source distribution or at
7		* https://www.openssl.org/source/license.html
8		*/
9
10		/*
11		* 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	15.3k	{
82	15.3k	PROV_RSA_CTX *prsactx;
83
84	15.3k	if (!ossl_prov_is_running())
85	0	return NULL;
86	15.3k	prsactx = OPENSSL_zalloc(sizeof(PROV_RSA_CTX));
87	15.3k	if (prsactx == NULL)
88	0	return NULL;
89	15.3k	prsactx->libctx = PROV_LIBCTX_OF(provctx);
90
91	15.3k	return prsactx;
92	15.3k	}
93
94		static int rsa_init(void vprsactx, void vrsa, const OSSL_PARAM params[],
95		int operation)
96	5.89k	{
97	5.89k	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
98
99	5.89k	if (!ossl_prov_is_running() \|\| prsactx == NULL \|\| vrsa == NULL)
100	0	return 0;
101
102	5.89k	if (!ossl_rsa_check_key(prsactx->libctx, vrsa, operation))
103	0	return 0;
104
105	5.89k	if (!RSA_up_ref(vrsa))
106	0	return 0;
107	5.89k	RSA_free(prsactx->rsa);
108	5.89k	prsactx->rsa = vrsa;
109	5.89k	prsactx->operation = operation;
110
111	5.89k	switch (RSA_test_flags(prsactx->rsa, RSA_FLAG_TYPE_MASK)) {
112	5.89k	case RSA_FLAG_TYPE_RSA:
113	5.89k	prsactx->pad_mode = RSA_PKCS1_PADDING;
114	5.89k	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	5.89k	}
120	5.89k	return rsa_set_ctx_params(prsactx, params);
121	5.89k	}
122
123		static int rsa_encrypt_init(void vprsactx, void vrsa,
124		const OSSL_PARAM params[])
125	5.41k	{
126	5.41k	return rsa_init(vprsactx, vrsa, params, EVP_PKEY_OP_ENCRYPT);
127	5.41k	}
128
129		static int rsa_decrypt_init(void vprsactx, void vrsa,
130		const OSSL_PARAM params[])
131	9.90k	{
132	9.90k	return rsa_init(vprsactx, vrsa, params, EVP_PKEY_OP_DECRYPT);
133	9.90k	}
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	10.8k	{
138	10.8k	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
139	10.8k	size_t len = RSA_size(prsactx->rsa);
140	10.8k	int ret;
141
142	10.8k	if (!ossl_prov_is_running())
143	0	return 0;
144
145	10.8k	if (len == 0) {
146	8	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
147	8	return 0;
148	8	}
149
150	10.8k	if (out == NULL) {
151	5.40k	*outlen = len;
152	5.40k	return 1;
153	5.40k	}
154
155	5.40k	if (outsize < len) {
156	0	ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
157	0	return 0;
158	0	}
159
160	5.40k	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 =
177	0	ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex(prsactx->libctx, tbuf,
178	0	rsasize, in, inlen,
179	0	prsactx->oaep_label,
180	0	prsactx->oaep_labellen,
181	0	prsactx->oaep_md,
182	0	prsactx->mgf1_md);
183
184	0	if (!ret) {
185	0	OPENSSL_free(tbuf);
186	0	return 0;
187	0	}
188	0	ret = RSA_public_encrypt(rsasize, tbuf, out, prsactx->rsa,
189	0	RSA_NO_PADDING);
190	0	OPENSSL_free(tbuf);
191	5.40k	} else {
192	5.40k	ret = RSA_public_encrypt(inlen, in, out, prsactx->rsa,
193	5.40k	prsactx->pad_mode);
194	5.40k	}
195		/* A ret value of 0 is not an error */
196	5.40k	if (ret < 0)
197	705	return ret;
198	4.69k	*outlen = ret;
199	4.69k	return 1;
200	5.40k	}
201
202		static int rsa_decrypt(void vprsactx, unsigned char out, size_t *outlen,
203		size_t outsize, const unsigned char *in, size_t inlen)
204	580	{
205	580	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
206	580	int ret;
207	580	size_t len = RSA_size(prsactx->rsa);
208
209	580	if (!ossl_prov_is_running())
210	0	return 0;
211
212	580	if (prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
213	580	if (out == NULL) {
214	0	*outlen = SSL_MAX_MASTER_KEY_LENGTH;
215	0	return 1;
216	0	}
217	580	if (outsize < SSL_MAX_MASTER_KEY_LENGTH) {
218	0	ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
219	0	return 0;
220	0	}
221	580	} else {
222	0	if (out == NULL) {
223	0	if (len == 0) {
224	0	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
225	0	return 0;
226	0	}
227	0	*outlen = len;
228	0	return 1;
229	0	}
230
231	0	if (outsize < len) {
232	0	ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
233	0	return 0;
234	0	}
235	0	}
236
237	580	if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING
238	580	\|\| prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
239	580	unsigned char *tbuf;
240
241	580	if ((tbuf = OPENSSL_malloc(len)) == NULL) {
242	0	ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
243	0	return 0;
244	0	}
245	580	ret = RSA_private_decrypt(inlen, in, tbuf, prsactx->rsa,
246	580	RSA_NO_PADDING);
247		/*
248		* With no padding then, on success ret should be len, otherwise an
249		* error occurred (non-constant time)
250		*/
251	580	if (ret != (int)len) {
252	1	OPENSSL_free(tbuf);
253	1	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_DECRYPT);
254	1	return 0;
255	1	}
256	579	if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
257	0	if (prsactx->oaep_md == NULL) {
258	0	prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
259	0	if (prsactx->oaep_md == NULL) {
260	0	OPENSSL_free(tbuf);
261	0	ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
262	0	return 0;
263	0	}
264	0	}
265	0	ret = RSA_padding_check_PKCS1_OAEP_mgf1(out, outsize, tbuf,
266	0	len, len,
267	0	prsactx->oaep_label,
268	0	prsactx->oaep_labellen,
269	0	prsactx->oaep_md,
270	0	prsactx->mgf1_md);
271	579	} else {
272		/* RSA_PKCS1_WITH_TLS_PADDING */
273	579	if (prsactx->client_version <= 0) {
274	0	ERR_raise(ERR_LIB_PROV, PROV_R_BAD_TLS_CLIENT_VERSION);
275	0	OPENSSL_free(tbuf);
276	0	return 0;
277	0	}
278	579	ret = ossl_rsa_padding_check_PKCS1_type_2_TLS(
279	579	prsactx->libctx, out, outsize, tbuf, len,
280	579	prsactx->client_version, prsactx->alt_version);
281	579	}
282	579	OPENSSL_free(tbuf);
283	579	} else {
284	0	ret = RSA_private_decrypt(inlen, in, out, prsactx->rsa,
285	0	prsactx->pad_mode);
286	0	}
287	579	outlen = constant_time_select_s(constant_time_msb_s(ret), outlen, ret);
288	579	ret = constant_time_select_int(constant_time_msb(ret), 0, 1);
289	579	return ret;
290	580	}
291
292		static void rsa_freectx(void *vprsactx)
293	15.3k	{
294	15.3k	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
295
296	15.3k	RSA_free(prsactx->rsa);
297
298	15.3k	EVP_MD_free(prsactx->oaep_md);
299	15.3k	EVP_MD_free(prsactx->mgf1_md);
300	15.3k	OPENSSL_free(prsactx->oaep_label);
301
302	15.3k	OPENSSL_free(prsactx);
303	15.3k	}
304
305		static void rsa_dupctx(void vprsactx)
306	0	{
307	0	PROV_RSA_CTX srcctx = (PROV_RSA_CTX )vprsactx;
308	0	PROV_RSA_CTX *dstctx;
309
310	0	if (!ossl_prov_is_running())
311	0	return NULL;
312
313	0	dstctx = OPENSSL_zalloc(sizeof(*srcctx));
314	0	if (dstctx == NULL)
315	0	return NULL;
316
317	0	dstctx = srcctx;
318	0	if (dstctx->rsa != NULL && !RSA_up_ref(dstctx->rsa)) {
319	0	OPENSSL_free(dstctx);
320	0	return NULL;
321	0	}
322
323	0	if (dstctx->oaep_md != NULL && !EVP_MD_up_ref(dstctx->oaep_md)) {
324	0	RSA_free(dstctx->rsa);
325	0	OPENSSL_free(dstctx);
326	0	return NULL;
327	0	}
328
329	0	if (dstctx->mgf1_md != NULL && !EVP_MD_up_ref(dstctx->mgf1_md)) {
330	0	RSA_free(dstctx->rsa);
331	0	EVP_MD_free(dstctx->oaep_md);
332	0	OPENSSL_free(dstctx);
333	0	return NULL;
334	0	}
335
336	0	return dstctx;
337	0	}
338
339		static int rsa_get_ctx_params(void vprsactx, OSSL_PARAM params)
340	0	{
341	0	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
342	0	OSSL_PARAM *p;
343
344	0	if (prsactx == NULL)
345	0	return 0;
346
347	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
348	0	if (p != NULL)
349	0	switch (p->data_type) {
350	0	case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
351	0	if (!OSSL_PARAM_set_int(p, prsactx->pad_mode))
352	0	return 0;
353	0	break;
354	0	case OSSL_PARAM_UTF8_STRING:
355	0	{
356	0	int i;
357	0	const char *word = NULL;
358
359	0	for (i = 0; padding_item[i].id != 0; i++) {
360	0	if (prsactx->pad_mode == (int)padding_item[i].id) {
361	0	word = padding_item[i].ptr;
362	0	break;
363	0	}
364	0	}
365
366	0	if (word != NULL) {
367	0	if (!OSSL_PARAM_set_utf8_string(p, word))
368	0	return 0;
369	0	} else {
370	0	ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
371	0	}
372	0	}
373	0	break;
374	0	default:
375	0	return 0;
376	0	}
377
378	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
379	0	if (p != NULL && !OSSL_PARAM_set_utf8_string(p, prsactx->oaep_md == NULL
380	0	? ""
381	0	: EVP_MD_get0_name(prsactx->oaep_md)))
382	0	return 0;
383
384	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
385	0	if (p != NULL) {
386	0	EVP_MD *mgf1_md = prsactx->mgf1_md == NULL ? prsactx->oaep_md
387	0	: prsactx->mgf1_md;
388
389	0	if (!OSSL_PARAM_set_utf8_string(p, mgf1_md == NULL
390	0	? ""
391	0	: EVP_MD_get0_name(mgf1_md)))
392	0	return 0;
393	0	}
394
395	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
396	0	if (p != NULL &&
397	0	!OSSL_PARAM_set_octet_ptr(p, prsactx->oaep_label,
398	0	prsactx->oaep_labellen))
399	0	return 0;
400
401	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
402	0	if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->client_version))
403	0	return 0;
404
405	0	p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
406	0	if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->alt_version))
407	0	return 0;
408
409	0	return 1;
410	0	}
411
412		static const OSSL_PARAM known_gettable_ctx_params[] = {
413		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
414		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
415		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
416		OSSL_PARAM_DEFN(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, OSSL_PARAM_OCTET_PTR,
417		NULL, 0),
418		OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
419		OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
420		OSSL_PARAM_END
421		};
422
423		static const OSSL_PARAM rsa_gettable_ctx_params(ossl_unused void vprsactx,
424		ossl_unused void *provctx)
425	0	{
426	0	return known_gettable_ctx_params;
427	0	}
428
429		static int rsa_set_ctx_params(void *vprsactx, const OSSL_PARAM params[])
430	2.01k	{
431	2.01k	PROV_RSA_CTX prsactx = (PROV_RSA_CTX )vprsactx;
432	2.01k	const OSSL_PARAM *p;
433	2.01k	char mdname[OSSL_MAX_NAME_SIZE];
434	2.01k	char mdprops[OSSL_MAX_PROPQUERY_SIZE] = { '\0' };
435	2.01k	char *str = NULL;
436
437	2.01k	if (prsactx == NULL)
438	0	return 0;
439	2.01k	if (params == NULL)
440	852	return 1;
441
442	1.16k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
443	1.16k	if (p != NULL) {
444	0	str = mdname;
445	0	if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
446	0	return 0;
447
448	0	p = OSSL_PARAM_locate_const(params,
449	0	OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS);
450	0	if (p != NULL) {
451	0	str = mdprops;
452	0	if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
453	0	return 0;
454	0	}
455
456	0	EVP_MD_free(prsactx->oaep_md);
457	0	prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, mdname, mdprops);
458
459	0	if (prsactx->oaep_md == NULL)
460	0	return 0;
461	0	}
462
463	1.16k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
464	1.16k	if (p != NULL) {
465	580	int pad_mode = 0;
466
467	580	switch (p->data_type) {
468	580	case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
469	580	if (!OSSL_PARAM_get_int(p, &pad_mode))
470	0	return 0;
471	580	break;
472	580	case OSSL_PARAM_UTF8_STRING:
473	0	{
474	0	int i;
475
476	0	if (p->data == NULL)
477	0	return 0;
478
479	0	for (i = 0; padding_item[i].id != 0; i++) {
480	0	if (strcmp(p->data, padding_item[i].ptr) == 0) {
481	0	pad_mode = padding_item[i].id;
482	0	break;
483	0	}
484	0	}
485	0	}
486	0	break;
487	0	default:
488	0	return 0;
489	580	}
490
491		/*
492		* PSS padding is for signatures only so is not compatible with
493		* asymmetric cipher use.
494		*/
495	580	if (pad_mode == RSA_PKCS1_PSS_PADDING)
496	0	return 0;
497	580	if (pad_mode == RSA_PKCS1_OAEP_PADDING && prsactx->oaep_md == NULL) {
498	0	prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA1", mdprops);
499	0	if (prsactx->oaep_md == NULL)
500	0	return 0;
501	0	}
502	580	prsactx->pad_mode = pad_mode;
503	580	}
504
505	1.16k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
506	1.16k	if (p != NULL) {
507	0	str = mdname;
508	0	if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
509	0	return 0;
510
511	0	p = OSSL_PARAM_locate_const(params,
512	0	OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS);
513	0	if (p != NULL) {
514	0	str = mdprops;
515	0	if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
516	0	return 0;
517	0	} else {
518	0	str = NULL;
519	0	}
520
521	0	EVP_MD_free(prsactx->mgf1_md);
522	0	prsactx->mgf1_md = EVP_MD_fetch(prsactx->libctx, mdname, str);
523
524	0	if (prsactx->mgf1_md == NULL)
525	0	return 0;
526	0	}
527
528	1.16k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
529	1.16k	if (p != NULL) {
530	0	void *tmp_label = NULL;
531	0	size_t tmp_labellen;
532
533	0	if (!OSSL_PARAM_get_octet_string(p, &tmp_label, 0, &tmp_labellen))
534	0	return 0;
535	0	OPENSSL_free(prsactx->oaep_label);
536	0	prsactx->oaep_label = (unsigned char *)tmp_label;
537	0	prsactx->oaep_labellen = tmp_labellen;
538	0	}
539
540	1.16k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
541	1.16k	if (p != NULL) {
542	580	unsigned int client_version;
543
544	580	if (!OSSL_PARAM_get_uint(p, &client_version))
545	0	return 0;
546	580	prsactx->client_version = client_version;
547	580	}
548
549	1.16k	p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
550	1.16k	if (p != NULL) {
551	0	unsigned int alt_version;
552
553	0	if (!OSSL_PARAM_get_uint(p, &alt_version))
554	0	return 0;
555	0	prsactx->alt_version = alt_version;
556	0	}
557
558	1.16k	return 1;
559	1.16k	}
560
561		static const OSSL_PARAM known_settable_ctx_params[] = {
562		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
563		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS, NULL, 0),
564		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
565		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
566		OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS, NULL, 0),
567		OSSL_PARAM_octet_string(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, NULL, 0),
568		OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
569		OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
570		OSSL_PARAM_END
571		};
572
573		static const OSSL_PARAM rsa_settable_ctx_params(ossl_unused void vprsactx,
574		ossl_unused void *provctx)
575	9.92k	{
576	9.92k	return known_settable_ctx_params;
577	9.92k	}
578
579		const OSSL_DISPATCH ossl_rsa_asym_cipher_functions[] = {
580		{ OSSL_FUNC_ASYM_CIPHER_NEWCTX, (void (*)(void))rsa_newctx },
581		{ OSSL_FUNC_ASYM_CIPHER_ENCRYPT_INIT, (void (*)(void))rsa_encrypt_init },
582		{ OSSL_FUNC_ASYM_CIPHER_ENCRYPT, (void (*)(void))rsa_encrypt },
583		{ OSSL_FUNC_ASYM_CIPHER_DECRYPT_INIT, (void (*)(void))rsa_decrypt_init },
584		{ OSSL_FUNC_ASYM_CIPHER_DECRYPT, (void (*)(void))rsa_decrypt },
585		{ OSSL_FUNC_ASYM_CIPHER_FREECTX, (void (*)(void))rsa_freectx },
586		{ OSSL_FUNC_ASYM_CIPHER_DUPCTX, (void (*)(void))rsa_dupctx },
587		{ OSSL_FUNC_ASYM_CIPHER_GET_CTX_PARAMS,
588		(void (*)(void))rsa_get_ctx_params },
589		{ OSSL_FUNC_ASYM_CIPHER_GETTABLE_CTX_PARAMS,
590		(void (*)(void))rsa_gettable_ctx_params },
591		{ OSSL_FUNC_ASYM_CIPHER_SET_CTX_PARAMS,
592		(void (*)(void))rsa_set_ctx_params },
593		{ OSSL_FUNC_ASYM_CIPHER_SETTABLE_CTX_PARAMS,
594		(void (*)(void))rsa_settable_ctx_params },
595		{ 0, NULL }
596		};