[thirdparty/openssl.git] / crypto / rsa / rsa_pmeth.c

/* crypto/rsa/rsa_pmeth.c */
/*
 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
 * 2006.
 */
/* ====================================================================
 * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/asn1t.h>
#include <openssl/x509.h>
#include <openssl/rsa.h>
#include <openssl/bn.h>
#include <openssl/evp.h>
#include <openssl/x509v3.h>
#ifndef OPENSSL_NO_CMS
# include <openssl/cms.h>
#endif
#include "internal/evp_int.h"
#include "rsa_locl.h"

/* RSA pkey context structure */

typedef struct {
    /* Key gen parameters */
    int nbits;
    BIGNUM *pub_exp;
    /* Keygen callback info */
    int gentmp[2];
    /* RSA padding mode */
    int pad_mode;
    /* message digest */
    const EVP_MD *md;
    /* message digest for MGF1 */
    const EVP_MD *mgf1md;
    /* PSS salt length */
    int saltlen;
    /* Temp buffer */
    unsigned char *tbuf;
    /* OAEP label */
    unsigned char *oaep_label;
    size_t oaep_labellen;
} RSA_PKEY_CTX;

static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
{
    RSA_PKEY_CTX *rctx;
    rctx = OPENSSL_zalloc(sizeof(*rctx));
    if (rctx == NULL)
        return 0;
    rctx->nbits = 1024;
    rctx->pad_mode = RSA_PKCS1_PADDING;
    rctx->saltlen = -2;
    ctx->data = rctx;
    ctx->keygen_info = rctx->gentmp;
    ctx->keygen_info_count = 2;

    return 1;
}

static int pkey_rsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
{
    RSA_PKEY_CTX *dctx, *sctx;
    if (!pkey_rsa_init(dst))
        return 0;
    sctx = src->data;
    dctx = dst->data;
    dctx->nbits = sctx->nbits;
    if (sctx->pub_exp) {
        dctx->pub_exp = BN_dup(sctx->pub_exp);
        if (!dctx->pub_exp)
            return 0;
    }
    dctx->pad_mode = sctx->pad_mode;
    dctx->md = sctx->md;
    dctx->mgf1md = sctx->mgf1md;
    if (sctx->oaep_label) {
        OPENSSL_free(dctx->oaep_label);
        dctx->oaep_label = OPENSSL_memdup(sctx->oaep_label, sctx->oaep_labellen);
        if (!dctx->oaep_label)
            return 0;
        dctx->oaep_labellen = sctx->oaep_labellen;
    }
    return 1;
}

static int setup_tbuf(RSA_PKEY_CTX *ctx, EVP_PKEY_CTX *pk)
{
    if (ctx->tbuf)
        return 1;
    ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey));
    if (ctx->tbuf == NULL)
        return 0;
    return 1;
}

static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx)
{
    RSA_PKEY_CTX *rctx = ctx->data;
    if (rctx) {
        BN_free(rctx->pub_exp);
        OPENSSL_free(rctx->tbuf);
        OPENSSL_free(rctx->oaep_label);
        OPENSSL_free(rctx);
    }
}

static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig,
                         size_t *siglen, const unsigned char *tbs,
                         size_t tbslen)
{
    int ret;
    RSA_PKEY_CTX *rctx = ctx->data;
    RSA *rsa = ctx->pkey->pkey.rsa;

    if (rctx->md) {
        if (tbslen != (size_t)EVP_MD_size(rctx->md)) {
            RSAerr(RSA_F_PKEY_RSA_SIGN, RSA_R_INVALID_DIGEST_LENGTH);
            return -1;
        }

        if (EVP_MD_type(rctx->md) == NID_mdc2) {
            unsigned int sltmp;
            if (rctx->pad_mode != RSA_PKCS1_PADDING)
                return -1;
            ret = RSA_sign_ASN1_OCTET_STRING(NID_mdc2,
                                             tbs, tbslen, sig, &sltmp, rsa);

            if (ret <= 0)
                return ret;
            ret = sltmp;
        } else if (rctx->pad_mode == RSA_X931_PADDING) {
            if ((size_t)EVP_PKEY_size(ctx->pkey) < tbslen + 1) {
                RSAerr(RSA_F_PKEY_RSA_SIGN, RSA_R_KEY_SIZE_TOO_SMALL);
                return -1;
            }
            if (!setup_tbuf(rctx, ctx)) {
                RSAerr(RSA_F_PKEY_RSA_SIGN, ERR_R_MALLOC_FAILURE);
                return -1;
            }
            memcpy(rctx->tbuf, tbs, tbslen);
            rctx->tbuf[tbslen] = RSA_X931_hash_id(EVP_MD_type(rctx->md));
            ret = RSA_private_encrypt(tbslen + 1, rctx->tbuf,
                                      sig, rsa, RSA_X931_PADDING);
        } else if (rctx->pad_mode == RSA_PKCS1_PADDING) {
            unsigned int sltmp;
            ret = RSA_sign(EVP_MD_type(rctx->md),
                           tbs, tbslen, sig, &sltmp, rsa);
            if (ret <= 0)
                return ret;
            ret = sltmp;
        } else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING) {
            if (!setup_tbuf(rctx, ctx))
                return -1;
            if (!RSA_padding_add_PKCS1_PSS_mgf1(rsa,
                                                rctx->tbuf, tbs,
                                                rctx->md, rctx->mgf1md,
                                                rctx->saltlen))
                return -1;
            ret = RSA_private_encrypt(RSA_size(rsa), rctx->tbuf,
                                      sig, rsa, RSA_NO_PADDING);
        } else
            return -1;
    } else
        ret = RSA_private_encrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
                                  rctx->pad_mode);
    if (ret < 0)
        return ret;
    *siglen = ret;
    return 1;
}

static int pkey_rsa_verifyrecover(EVP_PKEY_CTX *ctx,
                                  unsigned char *rout, size_t *routlen,
                                  const unsigned char *sig, size_t siglen)
{
    int ret;
    RSA_PKEY_CTX *rctx = ctx->data;

    if (rctx->md) {
        if (rctx->pad_mode == RSA_X931_PADDING) {
            if (!setup_tbuf(rctx, ctx))
                return -1;
            ret = RSA_public_decrypt(siglen, sig,
                                     rctx->tbuf, ctx->pkey->pkey.rsa,
                                     RSA_X931_PADDING);
            if (ret < 1)
                return 0;
            ret--;
            if (rctx->tbuf[ret] != RSA_X931_hash_id(EVP_MD_type(rctx->md))) {
                RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
                       RSA_R_ALGORITHM_MISMATCH);
                return 0;
            }
            if (ret != EVP_MD_size(rctx->md)) {
                RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
                       RSA_R_INVALID_DIGEST_LENGTH);
                return 0;
            }
            if (rout)
                memcpy(rout, rctx->tbuf, ret);
        } else if (rctx->pad_mode == RSA_PKCS1_PADDING) {
            size_t sltmp;
            ret = int_rsa_verify(EVP_MD_type(rctx->md),
                                 NULL, 0, rout, &sltmp,
                                 sig, siglen, ctx->pkey->pkey.rsa);
            if (ret <= 0)
                return 0;
            ret = sltmp;
        } else
            return -1;
    } else
        ret = RSA_public_decrypt(siglen, sig, rout, ctx->pkey->pkey.rsa,
                                 rctx->pad_mode);
    if (ret < 0)
        return ret;
    *routlen = ret;
    return 1;
}

static int pkey_rsa_verify(EVP_PKEY_CTX *ctx,
                           const unsigned char *sig, size_t siglen,
                           const unsigned char *tbs, size_t tbslen)
{
    RSA_PKEY_CTX *rctx = ctx->data;
    RSA *rsa = ctx->pkey->pkey.rsa;
    size_t rslen;
    if (rctx->md) {
        if (rctx->pad_mode == RSA_PKCS1_PADDING)
            return RSA_verify(EVP_MD_type(rctx->md), tbs, tbslen,
                              sig, siglen, rsa);
        if (rctx->pad_mode == RSA_X931_PADDING) {
            if (pkey_rsa_verifyrecover(ctx, NULL, &rslen, sig, siglen) <= 0)
                return 0;
        } else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING) {
            int ret;
            if (!setup_tbuf(rctx, ctx))
                return -1;
            ret = RSA_public_decrypt(siglen, sig, rctx->tbuf,
                                     rsa, RSA_NO_PADDING);
            if (ret <= 0)
                return 0;
            ret = RSA_verify_PKCS1_PSS_mgf1(rsa, tbs,
                                            rctx->md, rctx->mgf1md,
                                            rctx->tbuf, rctx->saltlen);
            if (ret <= 0)
                return 0;
            return 1;
        } else
            return -1;
    } else {
        if (!setup_tbuf(rctx, ctx))
            return -1;
        rslen = RSA_public_decrypt(siglen, sig, rctx->tbuf,
                                   rsa, rctx->pad_mode);
        if (rslen == 0)
            return 0;
    }

    if ((rslen != tbslen) || memcmp(tbs, rctx->tbuf, rslen))
        return 0;

    return 1;

}

static int pkey_rsa_encrypt(EVP_PKEY_CTX *ctx,
                            unsigned char *out, size_t *outlen,
                            const unsigned char *in, size_t inlen)
{
    int ret;
    RSA_PKEY_CTX *rctx = ctx->data;
    if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
        int klen = RSA_size(ctx->pkey->pkey.rsa);
        if (!setup_tbuf(rctx, ctx))
            return -1;
        if (!RSA_padding_add_PKCS1_OAEP_mgf1(rctx->tbuf, klen,
                                             in, inlen,
                                             rctx->oaep_label,
                                             rctx->oaep_labellen,
                                             rctx->md, rctx->mgf1md))
            return -1;
        ret = RSA_public_encrypt(klen, rctx->tbuf, out,
                                 ctx->pkey->pkey.rsa, RSA_NO_PADDING);
    } else
        ret = RSA_public_encrypt(inlen, in, out, ctx->pkey->pkey.rsa,
                                 rctx->pad_mode);
    if (ret < 0)
        return ret;
    *outlen = ret;
    return 1;
}

static int pkey_rsa_decrypt(EVP_PKEY_CTX *ctx,
                            unsigned char *out, size_t *outlen,
                            const unsigned char *in, size_t inlen)
{
    int ret;
    RSA_PKEY_CTX *rctx = ctx->data;
    if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
        int i;
        if (!setup_tbuf(rctx, ctx))
            return -1;
        ret = RSA_private_decrypt(inlen, in, rctx->tbuf,
                                  ctx->pkey->pkey.rsa, RSA_NO_PADDING);
        if (ret <= 0)
            return ret;
        for (i = 0; i < ret; i++) {
            if (rctx->tbuf[i])
                break;
        }
        ret = RSA_padding_check_PKCS1_OAEP_mgf1(out, ret, rctx->tbuf + i,
                                                ret - i, ret,
                                                rctx->oaep_label,
                                                rctx->oaep_labellen,
                                                rctx->md, rctx->mgf1md);
    } else
        ret = RSA_private_decrypt(inlen, in, out, ctx->pkey->pkey.rsa,
                                  rctx->pad_mode);
    if (ret < 0)
        return ret;
    *outlen = ret;
    return 1;
}

static int check_padding_md(const EVP_MD *md, int padding)
{
    int mdnid;
    if (!md)
        return 1;

    mdnid = EVP_MD_type(md);

    if (padding == RSA_NO_PADDING) {
        RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_PADDING_MODE);
        return 0;
    }

    if (padding == RSA_X931_PADDING) {
        if (RSA_X931_hash_id(mdnid) == -1) {
            RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_X931_DIGEST);
            return 0;
        }
    } else {
        switch(mdnid) {
        /* List of all supported RSA digests */
        case NID_sha1:
        case NID_sha224:
        case NID_sha256:
        case NID_sha384:
        case NID_sha512:
        case NID_md5:
        case NID_md5_sha1:
        case NID_md2:
        case NID_md4:
        case NID_mdc2:
        case NID_ripemd160:
            return 1;

        default:
            RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_DIGEST);
            return 0;

        }
    }

    return 1;
}

static int pkey_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
{
    RSA_PKEY_CTX *rctx = ctx->data;
    switch (type) {
    case EVP_PKEY_CTRL_RSA_PADDING:
        if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_PKCS1_PSS_PADDING)) {
            if (!check_padding_md(rctx->md, p1))
                return 0;
            if (p1 == RSA_PKCS1_PSS_PADDING) {
                if (!(ctx->operation &
                      (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY)))
                    goto bad_pad;
                if (!rctx->md)
                    rctx->md = EVP_sha1();
            }
            if (p1 == RSA_PKCS1_OAEP_PADDING) {
                if (!(ctx->operation & EVP_PKEY_OP_TYPE_CRYPT))
                    goto bad_pad;
                if (!rctx->md)
                    rctx->md = EVP_sha1();
            }
            rctx->pad_mode = p1;
            return 1;
        }
 bad_pad:
        RSAerr(RSA_F_PKEY_RSA_CTRL,
               RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
        return -2;

    case EVP_PKEY_CTRL_GET_RSA_PADDING:
        *(int *)p2 = rctx->pad_mode;
        return 1;

    case EVP_PKEY_CTRL_RSA_PSS_SALTLEN:
    case EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN:
        if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING) {
            RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PSS_SALTLEN);
            return -2;
        }
        if (type == EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN)
            *(int *)p2 = rctx->saltlen;
        else {
            if (p1 < -2)
                return -2;
            rctx->saltlen = p1;
        }
        return 1;

    case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
        if (p1 < 512) {
            RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_KEY_SIZE_TOO_SMALL);
            return -2;
        }
        rctx->nbits = p1;
        return 1;

    case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP:
        if (!p2)
            return -2;
        BN_free(rctx->pub_exp);
        rctx->pub_exp = p2;
        return 1;

    case EVP_PKEY_CTRL_RSA_OAEP_MD:
    case EVP_PKEY_CTRL_GET_RSA_OAEP_MD:
        if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
            RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
            return -2;
        }
        if (type == EVP_PKEY_CTRL_GET_RSA_OAEP_MD)
            *(const EVP_MD **)p2 = rctx->md;
        else
            rctx->md = p2;
        return 1;

    case EVP_PKEY_CTRL_MD:
        if (!check_padding_md(p2, rctx->pad_mode))
            return 0;
        rctx->md = p2;
        return 1;

    case EVP_PKEY_CTRL_GET_MD:
        *(const EVP_MD **)p2 = rctx->md;
        return 1;

    case EVP_PKEY_CTRL_RSA_MGF1_MD:
    case EVP_PKEY_CTRL_GET_RSA_MGF1_MD:
        if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING
            && rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
            RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_MGF1_MD);
            return -2;
        }
        if (type == EVP_PKEY_CTRL_GET_RSA_MGF1_MD) {
            if (rctx->mgf1md)
                *(const EVP_MD **)p2 = rctx->mgf1md;
            else
                *(const EVP_MD **)p2 = rctx->md;
        } else
            rctx->mgf1md = p2;
        return 1;

    case EVP_PKEY_CTRL_RSA_OAEP_LABEL:
        if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
            RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
            return -2;
        }
        OPENSSL_free(rctx->oaep_label);
        if (p2 && p1 > 0) {
            rctx->oaep_label = p2;
            rctx->oaep_labellen = p1;
        } else {
            rctx->oaep_label = NULL;
            rctx->oaep_labellen = 0;
        }
        return 1;

    case EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL:
        if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
            RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
            return -2;
        }
        *(unsigned char **)p2 = rctx->oaep_label;
        return rctx->oaep_labellen;

    case EVP_PKEY_CTRL_DIGESTINIT:
    case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
    case EVP_PKEY_CTRL_PKCS7_DECRYPT:
    case EVP_PKEY_CTRL_PKCS7_SIGN:
        return 1;
#ifndef OPENSSL_NO_CMS
    case EVP_PKEY_CTRL_CMS_DECRYPT:
    case EVP_PKEY_CTRL_CMS_ENCRYPT:
    case EVP_PKEY_CTRL_CMS_SIGN:
        return 1;
#endif
    case EVP_PKEY_CTRL_PEER_KEY:
        RSAerr(RSA_F_PKEY_RSA_CTRL,
               RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
        return -2;

    default:
        return -2;

    }
}

static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
                             const char *type, const char *value)
{
    if (!value) {
        RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_VALUE_MISSING);
        return 0;
    }
    if (strcmp(type, "rsa_padding_mode") == 0) {
        int pm;
        if (strcmp(value, "pkcs1") == 0)
            pm = RSA_PKCS1_PADDING;
        else if (strcmp(value, "sslv23") == 0)
            pm = RSA_SSLV23_PADDING;
        else if (strcmp(value, "none") == 0)
            pm = RSA_NO_PADDING;
        else if (strcmp(value, "oeap") == 0)
            pm = RSA_PKCS1_OAEP_PADDING;
        else if (strcmp(value, "oaep") == 0)
            pm = RSA_PKCS1_OAEP_PADDING;
        else if (strcmp(value, "x931") == 0)
            pm = RSA_X931_PADDING;
        else if (strcmp(value, "pss") == 0)
            pm = RSA_PKCS1_PSS_PADDING;
        else {
            RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_UNKNOWN_PADDING_TYPE);
            return -2;
        }
        return EVP_PKEY_CTX_set_rsa_padding(ctx, pm);
    }

    if (strcmp(type, "rsa_pss_saltlen") == 0) {
        int saltlen;
        saltlen = atoi(value);
        return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, saltlen);
    }

    if (strcmp(type, "rsa_keygen_bits") == 0) {
        int nbits;
        nbits = atoi(value);
        return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, nbits);
    }

    if (strcmp(type, "rsa_keygen_pubexp") == 0) {
        int ret;
        BIGNUM *pubexp = NULL;
        if (!BN_asc2bn(&pubexp, value))
            return 0;
        ret = EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp);
        if (ret <= 0)
            BN_free(pubexp);
        return ret;
    }

    if (strcmp(type, "rsa_mgf1_md") == 0) {
        const EVP_MD *md;
        if ((md = EVP_get_digestbyname(value)) == NULL) {
            RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_INVALID_DIGEST);
            return 0;
        }
        return EVP_PKEY_CTX_set_rsa_mgf1_md(ctx, md);
    }

    if (strcmp(type, "rsa_oaep_md") == 0) {
        const EVP_MD *md;
        if ((md = EVP_get_digestbyname(value)) == NULL) {
            RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_INVALID_DIGEST);
            return 0;
        }
        return EVP_PKEY_CTX_set_rsa_oaep_md(ctx, md);
    }
    if (strcmp(type, "rsa_oaep_label") == 0) {
        unsigned char *lab;
        long lablen;
        int ret;
        lab = string_to_hex(value, &lablen);
        if (!lab)
            return 0;
        ret = EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, lab, lablen);
        if (ret <= 0)
            OPENSSL_free(lab);
        return ret;
    }

    return -2;
}

static int pkey_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
{
    RSA *rsa = NULL;
    RSA_PKEY_CTX *rctx = ctx->data;
    BN_GENCB *pcb;
    int ret;
    if (rctx->pub_exp == NULL) {
        rctx->pub_exp = BN_new();
        if (rctx->pub_exp == NULL || !BN_set_word(rctx->pub_exp, RSA_F4))
            return 0;
    }
    rsa = RSA_new();
    if (rsa == NULL)
        return 0;
    if (ctx->pkey_gencb) {
        pcb = BN_GENCB_new();
        if (pcb == NULL) {
            RSA_free(rsa);
            return 0;
        }
        evp_pkey_set_cb_translate(pcb, ctx);
    } else
        pcb = NULL;
    ret = RSA_generate_key_ex(rsa, rctx->nbits, rctx->pub_exp, pcb);
    BN_GENCB_free(pcb);
    if (ret > 0)
        EVP_PKEY_assign_RSA(pkey, rsa);
    else
        RSA_free(rsa);
    return ret;
}

const EVP_PKEY_METHOD rsa_pkey_meth = {
    EVP_PKEY_RSA,
    EVP_PKEY_FLAG_AUTOARGLEN,
    pkey_rsa_init,
    pkey_rsa_copy,
    pkey_rsa_cleanup,

    0, 0,

    0,
    pkey_rsa_keygen,

    0,
    pkey_rsa_sign,

    0,
    pkey_rsa_verify,

    0,
    pkey_rsa_verifyrecover,

    0, 0, 0, 0,

    0,
    pkey_rsa_encrypt,

    0,
    pkey_rsa_decrypt,

    0, 0,

    pkey_rsa_ctrl,
    pkey_rsa_ctrl_str
};
Commit	Line	Data
09b88a4a	1	/* crypto/rsa/rsa_pmeth.c */
0f113f3e MC	2	/*
	3	* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
	4	* 2006.
0b6f3c66 DSH	5	*/
	6	/* ====================================================================
	7	* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
	8	*
	9	* Redistribution and use in source and binary forms, with or without
	10	* modification, are permitted provided that the following conditions
	11	* are met:
	12	*
	13	* 1. Redistributions of source code must retain the above copyright
0f113f3e	14	* notice, this list of conditions and the following disclaimer.
0b6f3c66 DSH	15	*
	16	* 2. Redistributions in binary form must reproduce the above copyright
	17	* notice, this list of conditions and the following disclaimer in
	18	* the documentation and/or other materials provided with the
	19	* distribution.
	20	*
	21	* 3. All advertising materials mentioning features or use of this
	22	* software must display the following acknowledgment:
	23	* "This product includes software developed by the OpenSSL Project
	24	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
	25	*
	26	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	27	* endorse or promote products derived from this software without
	28	* prior written permission. For written permission, please contact
	29	* licensing@OpenSSL.org.
	30	*
	31	* 5. Products derived from this software may not be called "OpenSSL"
	32	* nor may "OpenSSL" appear in their names without prior written
	33	* permission of the OpenSSL Project.
	34	*
	35	* 6. Redistributions of any form whatsoever must retain the following
	36	* acknowledgment:
	37	* "This product includes software developed by the OpenSSL Project
	38	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	39	*
	40	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	41	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	42	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	43	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	44	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	45	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	46	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	47	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	48	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	49	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	50	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	51	* OF THE POSSIBILITY OF SUCH DAMAGE.
	52	* ====================================================================
	53	*
	54	* This product includes cryptographic software written by Eric Young
	55	* (eay@cryptsoft.com). This product includes software written by Tim
	56	* Hudson (tjh@cryptsoft.com).
	57	*
	58	*/
	59
	60	#include <stdio.h>
b39fc560	61	#include "internal/cryptlib.h"
0b6f3c66 DSH	62	#include <openssl/asn1t.h>
	63	#include <openssl/x509.h>
	64	#include <openssl/rsa.h>
1e26a8ba	65	#include <openssl/bn.h>
b2a97be7	66	#include <openssl/evp.h>
271fef0e	67	#include <openssl/x509v3.h>
b3339050	68	#ifndef OPENSSL_NO_CMS
0f113f3e	69	# include <openssl/cms.h>
b3339050	70	#endif
27af42f9	71	#include "internal/evp_int.h"
777c47ac	72	#include "rsa_locl.h"
b2a97be7	73
07e970c7 DSH	74	/* RSA pkey context structure */
07e970c7 DSH	75
0f113f3e MC	76	typedef struct {
	77	/* Key gen parameters */
	78	int nbits;
	79	BIGNUM *pub_exp;
	80	/* Keygen callback info */
	81	int gentmp[2];
	82	/* RSA padding mode */
	83	int pad_mode;
	84	/* message digest */
	85	const EVP_MD *md;
	86	/* message digest for MGF1 */
	87	const EVP_MD *mgf1md;
	88	/* PSS salt length */
	89	int saltlen;
	90	/* Temp buffer */
	91	unsigned char *tbuf;
	92	/* OAEP label */
	93	unsigned char *oaep_label;
	94	size_t oaep_labellen;
	95	} RSA_PKEY_CTX;
07e970c7 DSH	96
07e970c7 DSH	97	static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
0f113f3e MC	98	{
0f113f3e MC	99	RSA_PKEY_CTX *rctx;
64b25758	100	rctx = OPENSSL_zalloc(sizeof(*rctx));
90945fa3	101	if (rctx == NULL)
0f113f3e MC	102	return 0;
0f113f3e MC	103	rctx->nbits = 1024;
0f113f3e	104	rctx->pad_mode = RSA_PKCS1_PADDING;
0f113f3e	105	rctx->saltlen = -2;
0f113f3e MC	106	ctx->data = rctx;
	107	ctx->keygen_info = rctx->gentmp;
	108	ctx->keygen_info_count = 2;
	109
	110	return 1;
	111	}
b2a97be7	112
8bdcef40	113	static int pkey_rsa_copy(EVP_PKEY_CTX dst, EVP_PKEY_CTX src)
0f113f3e MC	114	{
	115	RSA_PKEY_CTX dctx, sctx;
	116	if (!pkey_rsa_init(dst))
	117	return 0;
	118	sctx = src->data;
	119	dctx = dst->data;
	120	dctx->nbits = sctx->nbits;
	121	if (sctx->pub_exp) {
	122	dctx->pub_exp = BN_dup(sctx->pub_exp);
	123	if (!dctx->pub_exp)
	124	return 0;
	125	}
	126	dctx->pad_mode = sctx->pad_mode;
	127	dctx->md = sctx->md;
	128	dctx->mgf1md = sctx->mgf1md;
	129	if (sctx->oaep_label) {
b548a1f1	130	OPENSSL_free(dctx->oaep_label);
7644a9ae	131	dctx->oaep_label = OPENSSL_memdup(sctx->oaep_label, sctx->oaep_labellen);
0f113f3e MC	132	if (!dctx->oaep_label)
	133	return 0;
	134	dctx->oaep_labellen = sctx->oaep_labellen;
	135	}
	136	return 1;
	137	}
8bdcef40	138
b2a97be7	139	static int setup_tbuf(RSA_PKEY_CTX ctx, EVP_PKEY_CTX pk)
0f113f3e MC	140	{
	141	if (ctx->tbuf)
	142	return 1;
	143	ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey));
90945fa3	144	if (ctx->tbuf == NULL)
0f113f3e MC	145	return 0;
	146	return 1;
	147	}
07e970c7 DSH	148
07e970c7 DSH	149	static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx)
0f113f3e MC	150	{
	151	RSA_PKEY_CTX *rctx = ctx->data;
	152	if (rctx) {
23a1d5e9	153	BN_free(rctx->pub_exp);
b548a1f1 RS	154	OPENSSL_free(rctx->tbuf);
b548a1f1 RS	155	OPENSSL_free(rctx->oaep_label);
0f113f3e MC	156	OPENSSL_free(rctx);
	157	}
	158	}
	159
	160	static int pkey_rsa_sign(EVP_PKEY_CTX ctx, unsigned char sig,
	161	size_t siglen, const unsigned char tbs,
	162	size_t tbslen)
	163	{
	164	int ret;
	165	RSA_PKEY_CTX *rctx = ctx->data;
	166	RSA *rsa = ctx->pkey->pkey.rsa;
	167
	168	if (rctx->md) {
	169	if (tbslen != (size_t)EVP_MD_size(rctx->md)) {
	170	RSAerr(RSA_F_PKEY_RSA_SIGN, RSA_R_INVALID_DIGEST_LENGTH);
	171	return -1;
	172	}
	173
	174	if (EVP_MD_type(rctx->md) == NID_mdc2) {
	175	unsigned int sltmp;
	176	if (rctx->pad_mode != RSA_PKCS1_PADDING)
	177	return -1;
	178	ret = RSA_sign_ASN1_OCTET_STRING(NID_mdc2,
	179	tbs, tbslen, sig, &sltmp, rsa);
	180
	181	if (ret <= 0)
	182	return ret;
	183	ret = sltmp;
	184	} else if (rctx->pad_mode == RSA_X931_PADDING) {
34166d41 MC	185	if ((size_t)EVP_PKEY_size(ctx->pkey) < tbslen + 1) {
34166d41 MC	186	RSAerr(RSA_F_PKEY_RSA_SIGN, RSA_R_KEY_SIZE_TOO_SMALL);
0f113f3e	187	return -1;
34166d41 MC	188	}
	189	if (!setup_tbuf(rctx, ctx)) {
	190	RSAerr(RSA_F_PKEY_RSA_SIGN, ERR_R_MALLOC_FAILURE);
	191	return -1;
	192	}
0f113f3e MC	193	memcpy(rctx->tbuf, tbs, tbslen);
	194	rctx->tbuf[tbslen] = RSA_X931_hash_id(EVP_MD_type(rctx->md));
	195	ret = RSA_private_encrypt(tbslen + 1, rctx->tbuf,
	196	sig, rsa, RSA_X931_PADDING);
	197	} else if (rctx->pad_mode == RSA_PKCS1_PADDING) {
	198	unsigned int sltmp;
	199	ret = RSA_sign(EVP_MD_type(rctx->md),
	200	tbs, tbslen, sig, &sltmp, rsa);
	201	if (ret <= 0)
	202	return ret;
	203	ret = sltmp;
	204	} else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING) {
	205	if (!setup_tbuf(rctx, ctx))
	206	return -1;
	207	if (!RSA_padding_add_PKCS1_PSS_mgf1(rsa,
	208	rctx->tbuf, tbs,
	209	rctx->md, rctx->mgf1md,
	210	rctx->saltlen))
	211	return -1;
	212	ret = RSA_private_encrypt(RSA_size(rsa), rctx->tbuf,
	213	sig, rsa, RSA_NO_PADDING);
	214	} else
	215	return -1;
	216	} else
	217	ret = RSA_private_encrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
	218	rctx->pad_mode);
	219	if (ret < 0)
	220	return ret;
	221	*siglen = ret;
	222	return 1;
	223	}
07e970c7 DSH	224
07e970c7 DSH	225	static int pkey_rsa_verifyrecover(EVP_PKEY_CTX *ctx,
0f113f3e MC	226	unsigned char rout, size_t routlen,
	227	const unsigned char *sig, size_t siglen)
	228	{
	229	int ret;
	230	RSA_PKEY_CTX *rctx = ctx->data;
	231
	232	if (rctx->md) {
	233	if (rctx->pad_mode == RSA_X931_PADDING) {
	234	if (!setup_tbuf(rctx, ctx))
	235	return -1;
	236	ret = RSA_public_decrypt(siglen, sig,
	237	rctx->tbuf, ctx->pkey->pkey.rsa,
	238	RSA_X931_PADDING);
	239	if (ret < 1)
	240	return 0;
	241	ret--;
	242	if (rctx->tbuf[ret] != RSA_X931_hash_id(EVP_MD_type(rctx->md))) {
	243	RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
	244	RSA_R_ALGORITHM_MISMATCH);
	245	return 0;
	246	}
	247	if (ret != EVP_MD_size(rctx->md)) {
	248	RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
	249	RSA_R_INVALID_DIGEST_LENGTH);
	250	return 0;
	251	}
	252	if (rout)
	253	memcpy(rout, rctx->tbuf, ret);
	254	} else if (rctx->pad_mode == RSA_PKCS1_PADDING) {
	255	size_t sltmp;
	256	ret = int_rsa_verify(EVP_MD_type(rctx->md),
	257	NULL, 0, rout, &sltmp,
	258	sig, siglen, ctx->pkey->pkey.rsa);
	259	if (ret <= 0)
	260	return 0;
	261	ret = sltmp;
	262	} else
	263	return -1;
	264	} else
	265	ret = RSA_public_decrypt(siglen, sig, rout, ctx->pkey->pkey.rsa,
	266	rctx->pad_mode);
	267	if (ret < 0)
	268	return ret;
	269	*routlen = ret;
	270	return 1;
	271	}
07e970c7	272
4f59b658	273	static int pkey_rsa_verify(EVP_PKEY_CTX *ctx,
0f113f3e MC	274	const unsigned char *sig, size_t siglen,
	275	const unsigned char *tbs, size_t tbslen)
	276	{
	277	RSA_PKEY_CTX *rctx = ctx->data;
	278	RSA *rsa = ctx->pkey->pkey.rsa;
	279	size_t rslen;
	280	if (rctx->md) {
	281	if (rctx->pad_mode == RSA_PKCS1_PADDING)
	282	return RSA_verify(EVP_MD_type(rctx->md), tbs, tbslen,
	283	sig, siglen, rsa);
	284	if (rctx->pad_mode == RSA_X931_PADDING) {
	285	if (pkey_rsa_verifyrecover(ctx, NULL, &rslen, sig, siglen) <= 0)
	286	return 0;
	287	} else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING) {
	288	int ret;
	289	if (!setup_tbuf(rctx, ctx))
	290	return -1;
	291	ret = RSA_public_decrypt(siglen, sig, rctx->tbuf,
	292	rsa, RSA_NO_PADDING);
	293	if (ret <= 0)
	294	return 0;
	295	ret = RSA_verify_PKCS1_PSS_mgf1(rsa, tbs,
	296	rctx->md, rctx->mgf1md,
	297	rctx->tbuf, rctx->saltlen);
	298	if (ret <= 0)
	299	return 0;
	300	return 1;
	301	} else
	302	return -1;
	303	} else {
	304	if (!setup_tbuf(rctx, ctx))
	305	return -1;
	306	rslen = RSA_public_decrypt(siglen, sig, rctx->tbuf,
	307	rsa, rctx->pad_mode);
	308	if (rslen == 0)
	309	return 0;
	310	}
	311
	312	if ((rslen != tbslen) \|\| memcmp(tbs, rctx->tbuf, rslen))
	313	return 0;
	314
	315	return 1;
	316
	317	}
4f59b658	318
eaff5a14	319	static int pkey_rsa_encrypt(EVP_PKEY_CTX *ctx,
0f113f3e MC	320	unsigned char out, size_t outlen,
	321	const unsigned char *in, size_t inlen)
	322	{
	323	int ret;
	324	RSA_PKEY_CTX *rctx = ctx->data;
	325	if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
	326	int klen = RSA_size(ctx->pkey->pkey.rsa);
	327	if (!setup_tbuf(rctx, ctx))
	328	return -1;
	329	if (!RSA_padding_add_PKCS1_OAEP_mgf1(rctx->tbuf, klen,
	330	in, inlen,
	331	rctx->oaep_label,
	332	rctx->oaep_labellen,
	333	rctx->md, rctx->mgf1md))
	334	return -1;
	335	ret = RSA_public_encrypt(klen, rctx->tbuf, out,
	336	ctx->pkey->pkey.rsa, RSA_NO_PADDING);
	337	} else
	338	ret = RSA_public_encrypt(inlen, in, out, ctx->pkey->pkey.rsa,
	339	rctx->pad_mode);
	340	if (ret < 0)
	341	return ret;
	342	*outlen = ret;
	343	return 1;
	344	}
8cd44e36	345
eaff5a14	346	static int pkey_rsa_decrypt(EVP_PKEY_CTX *ctx,
0f113f3e MC	347	unsigned char out, size_t outlen,
	348	const unsigned char *in, size_t inlen)
	349	{
	350	int ret;
	351	RSA_PKEY_CTX *rctx = ctx->data;
	352	if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
	353	int i;
	354	if (!setup_tbuf(rctx, ctx))
	355	return -1;
	356	ret = RSA_private_decrypt(inlen, in, rctx->tbuf,
	357	ctx->pkey->pkey.rsa, RSA_NO_PADDING);
	358	if (ret <= 0)
	359	return ret;
	360	for (i = 0; i < ret; i++) {
	361	if (rctx->tbuf[i])
	362	break;
	363	}
	364	ret = RSA_padding_check_PKCS1_OAEP_mgf1(out, ret, rctx->tbuf + i,
	365	ret - i, ret,
	366	rctx->oaep_label,
	367	rctx->oaep_labellen,
	368	rctx->md, rctx->mgf1md);
	369	} else
	370	ret = RSA_private_decrypt(inlen, in, out, ctx->pkey->pkey.rsa,
	371	rctx->pad_mode);
	372	if (ret < 0)
	373	return ret;
	374	*outlen = ret;
	375	return 1;
	376	}
07e970c7	377
75d44c04	378	static int check_padding_md(const EVP_MD *md, int padding)
0f113f3e	379	{
7f572e95	380	int mdnid;
0f113f3e MC	381	if (!md)
	382	return 1;
	383
7f572e95 DSH	384	mdnid = EVP_MD_type(md);
7f572e95 DSH	385
0f113f3e MC	386	if (padding == RSA_NO_PADDING) {
	387	RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_PADDING_MODE);
	388	return 0;
	389	}
	390
	391	if (padding == RSA_X931_PADDING) {
7f572e95	392	if (RSA_X931_hash_id(mdnid) == -1) {
0f113f3e MC	393	RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_X931_DIGEST);
	394	return 0;
	395	}
7f572e95 DSH	396	} else {
	397	switch(mdnid) {
	398	/* List of all supported RSA digests */
	399	case NID_sha1:
	400	case NID_sha224:
	401	case NID_sha256:
	402	case NID_sha384:
	403	case NID_sha512:
	404	case NID_md5:
	405	case NID_md5_sha1:
	406	case NID_md2:
	407	case NID_md4:
	408	case NID_mdc2:
	409	case NID_ripemd160:
	410	return 1;
	411
	412	default:
	413	RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_DIGEST);
	414	return 0;
	415
	416	}
0f113f3e MC	417	}
	418
	419	return 1;
	420	}
b2a97be7	421
4a3dc3c0	422	static int pkey_rsa_ctrl(EVP_PKEY_CTX ctx, int type, int p1, void p2)
0f113f3e MC	423	{
	424	RSA_PKEY_CTX *rctx = ctx->data;
	425	switch (type) {
	426	case EVP_PKEY_CTRL_RSA_PADDING:
	427	if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_PKCS1_PSS_PADDING)) {
	428	if (!check_padding_md(rctx->md, p1))
	429	return 0;
	430	if (p1 == RSA_PKCS1_PSS_PADDING) {
	431	if (!(ctx->operation &
	432	(EVP_PKEY_OP_SIGN \| EVP_PKEY_OP_VERIFY)))
	433	goto bad_pad;
	434	if (!rctx->md)
	435	rctx->md = EVP_sha1();
	436	}
	437	if (p1 == RSA_PKCS1_OAEP_PADDING) {
	438	if (!(ctx->operation & EVP_PKEY_OP_TYPE_CRYPT))
	439	goto bad_pad;
	440	if (!rctx->md)
	441	rctx->md = EVP_sha1();
	442	}
	443	rctx->pad_mode = p1;
	444	return 1;
	445	}
	446	bad_pad:
	447	RSAerr(RSA_F_PKEY_RSA_CTRL,
	448	RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
	449	return -2;
	450
	451	case EVP_PKEY_CTRL_GET_RSA_PADDING:
	452	(int )p2 = rctx->pad_mode;
	453	return 1;
	454
	455	case EVP_PKEY_CTRL_RSA_PSS_SALTLEN:
	456	case EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN:
	457	if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING) {
	458	RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PSS_SALTLEN);
	459	return -2;
	460	}
	461	if (type == EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN)
	462	(int )p2 = rctx->saltlen;
	463	else {
	464	if (p1 < -2)
	465	return -2;
	466	rctx->saltlen = p1;
	467	}
	468	return 1;
	469
	470	case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
	471	if (p1 < 512) {
	472	RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_KEY_SIZE_TOO_SMALL);
	473	return -2;
	474	}
	475	rctx->nbits = p1;
	476	return 1;
	477
	478	case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP:
	479	if (!p2)
	480	return -2;
	481	BN_free(rctx->pub_exp);
	482	rctx->pub_exp = p2;
	483	return 1;
	484
	485	case EVP_PKEY_CTRL_RSA_OAEP_MD:
	486	case EVP_PKEY_CTRL_GET_RSA_OAEP_MD:
487	if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
488	RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
489	return -2;
490	}
491	if (type == EVP_PKEY_CTRL_GET_RSA_OAEP_MD)
492	(const EVP_MD *)p2 = rctx->md;
493	else
494	rctx->md = p2;
495	return 1;
496
497	case EVP_PKEY_CTRL_MD:
498	if (!check_padding_md(p2, rctx->pad_mode))
499	return 0;
500	rctx->md = p2;
501	return 1;
502
503	case EVP_PKEY_CTRL_GET_MD:
504	(const EVP_MD *)p2 = rctx->md;
505	return 1;
506
507	case EVP_PKEY_CTRL_RSA_MGF1_MD:
508	case EVP_PKEY_CTRL_GET_RSA_MGF1_MD:
509	if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING
510	&& rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
511	RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_MGF1_MD);
512	return -2;
513	}
514	if (type == EVP_PKEY_CTRL_GET_RSA_MGF1_MD) {
515	if (rctx->mgf1md)
516	(const EVP_MD *)p2 = rctx->mgf1md;
517	else
518	(const EVP_MD *)p2 = rctx->md;
519	} else
520	rctx->mgf1md = p2;
521	return 1;
522
523	case EVP_PKEY_CTRL_RSA_OAEP_LABEL:
524	if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
525	RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
526	return -2;
527	}
b548a1f1	528	OPENSSL_free(rctx->oaep_label);
0f113f3e MC	529	if (p2 && p1 > 0) {
	530	rctx->oaep_label = p2;
	531	rctx->oaep_labellen = p1;
	532	} else {
	533	rctx->oaep_label = NULL;
	534	rctx->oaep_labellen = 0;
	535	}
	536	return 1;
	537
	538	case EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL:
	539	if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
	540	RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
	541	return -2;
	542	}
	543	(unsigned char *)p2 = rctx->oaep_label;
	544	return rctx->oaep_labellen;
	545
	546	case EVP_PKEY_CTRL_DIGESTINIT:
	547	case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
	548	case EVP_PKEY_CTRL_PKCS7_DECRYPT:
	549	case EVP_PKEY_CTRL_PKCS7_SIGN:
	550	return 1;
8931b30d	551	#ifndef OPENSSL_NO_CMS
0f113f3e MC	552	case EVP_PKEY_CTRL_CMS_DECRYPT:
	553	case EVP_PKEY_CTRL_CMS_ENCRYPT:
	554	case EVP_PKEY_CTRL_CMS_SIGN:
	555	return 1;
b3339050	556	#endif
0f113f3e MC	557	case EVP_PKEY_CTRL_PEER_KEY:
	558	RSAerr(RSA_F_PKEY_RSA_CTRL,
	559	RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	560	return -2;
	561
	562	default:
	563	return -2;
399a6f0b	564
0f113f3e MC	565	}
0f113f3e MC	566	}
4a3dc3c0	567
4a3dc3c0	568	static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
0f113f3e MC	569	const char type, const char value)
	570	{
	571	if (!value) {
	572	RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_VALUE_MISSING);
	573	return 0;
	574	}
86885c28	575	if (strcmp(type, "rsa_padding_mode") == 0) {
0f113f3e	576	int pm;
86885c28	577	if (strcmp(value, "pkcs1") == 0)
0f113f3e	578	pm = RSA_PKCS1_PADDING;
86885c28	579	else if (strcmp(value, "sslv23") == 0)
0f113f3e	580	pm = RSA_SSLV23_PADDING;
86885c28	581	else if (strcmp(value, "none") == 0)
0f113f3e	582	pm = RSA_NO_PADDING;
86885c28	583	else if (strcmp(value, "oeap") == 0)
0f113f3e	584	pm = RSA_PKCS1_OAEP_PADDING;
86885c28	585	else if (strcmp(value, "oaep") == 0)
0f113f3e	586	pm = RSA_PKCS1_OAEP_PADDING;
86885c28	587	else if (strcmp(value, "x931") == 0)
0f113f3e	588	pm = RSA_X931_PADDING;
86885c28	589	else if (strcmp(value, "pss") == 0)
0f113f3e MC	590	pm = RSA_PKCS1_PSS_PADDING;
	591	else {
	592	RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_UNKNOWN_PADDING_TYPE);
	593	return -2;
	594	}
	595	return EVP_PKEY_CTX_set_rsa_padding(ctx, pm);
	596	}
	597
86885c28	598	if (strcmp(type, "rsa_pss_saltlen") == 0) {
0f113f3e MC	599	int saltlen;
	600	saltlen = atoi(value);
	601	return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, saltlen);
	602	}
	603
86885c28	604	if (strcmp(type, "rsa_keygen_bits") == 0) {
0f113f3e MC	605	int nbits;
	606	nbits = atoi(value);
	607	return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, nbits);
	608	}
	609
86885c28	610	if (strcmp(type, "rsa_keygen_pubexp") == 0) {
0f113f3e MC	611	int ret;
	612	BIGNUM *pubexp = NULL;
	613	if (!BN_asc2bn(&pubexp, value))
	614	return 0;
	615	ret = EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp);
	616	if (ret <= 0)
	617	BN_free(pubexp);
	618	return ret;
	619	}
	620
86885c28	621	if (strcmp(type, "rsa_mgf1_md") == 0) {
0f113f3e	622	const EVP_MD *md;
75ebbd9a	623	if ((md = EVP_get_digestbyname(value)) == NULL) {
0f113f3e MC	624	RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_INVALID_DIGEST);
	625	return 0;
	626	}
	627	return EVP_PKEY_CTX_set_rsa_mgf1_md(ctx, md);
	628	}
	629
86885c28	630	if (strcmp(type, "rsa_oaep_md") == 0) {
0f113f3e	631	const EVP_MD *md;
75ebbd9a	632	if ((md = EVP_get_digestbyname(value)) == NULL) {
0f113f3e MC	633	RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_INVALID_DIGEST);
	634	return 0;
	635	}
	636	return EVP_PKEY_CTX_set_rsa_oaep_md(ctx, md);
	637	}
86885c28	638	if (strcmp(type, "rsa_oaep_label") == 0) {
0f113f3e MC	639	unsigned char *lab;
	640	long lablen;
	641	int ret;
	642	lab = string_to_hex(value, &lablen);
	643	if (!lab)
	644	return 0;
	645	ret = EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, lab, lablen);
	646	if (ret <= 0)
	647	OPENSSL_free(lab);
	648	return ret;
	649	}
	650
	651	return -2;
	652	}
4a3dc3c0	653
f5cda4cb	654	static int pkey_rsa_keygen(EVP_PKEY_CTX ctx, EVP_PKEY pkey)
0f113f3e MC	655	{
	656	RSA *rsa = NULL;
	657	RSA_PKEY_CTX *rctx = ctx->data;
	658	BN_GENCB *pcb;
	659	int ret;
90945fa3	660	if (rctx->pub_exp == NULL) {
0f113f3e	661	rctx->pub_exp = BN_new();
90945fa3	662	if (rctx->pub_exp == NULL \|\| !BN_set_word(rctx->pub_exp, RSA_F4))
0f113f3e MC	663	return 0;
	664	}
	665	rsa = RSA_new();
90945fa3	666	if (rsa == NULL)
0f113f3e MC	667	return 0;
	668	if (ctx->pkey_gencb) {
	669	pcb = BN_GENCB_new();
90945fa3	670	if (pcb == NULL) {
0f113f3e MC	671	RSA_free(rsa);
	672	return 0;
	673	}
	674	evp_pkey_set_cb_translate(pcb, ctx);
	675	} else
	676	pcb = NULL;
	677	ret = RSA_generate_key_ex(rsa, rctx->nbits, rctx->pub_exp, pcb);
	678	BN_GENCB_free(pcb);
	679	if (ret > 0)
	680	EVP_PKEY_assign_RSA(pkey, rsa);
	681	else
	682	RSA_free(rsa);
	683	return ret;
	684	}
	685
	686	const EVP_PKEY_METHOD rsa_pkey_meth = {
	687	EVP_PKEY_RSA,
	688	EVP_PKEY_FLAG_AUTOARGLEN,
	689	pkey_rsa_init,
	690	pkey_rsa_copy,
	691	pkey_rsa_cleanup,
	692
	693	0, 0,
	694
	695	0,
	696	pkey_rsa_keygen,
	697
	698	0,
	699	pkey_rsa_sign,
	700
	701	0,
	702	pkey_rsa_verify,
	703
	704	0,
	705	pkey_rsa_verifyrecover,
	706
	707	0, 0, 0, 0,
	708
	709	0,
	710	pkey_rsa_encrypt,
	711
	712	0,
	713	pkey_rsa_decrypt,
	714
	715	0, 0,
	716
	717	pkey_rsa_ctrl,
	718	pkey_rsa_ctrl_str
	719	};