[thirdparty/openssl.git] / crypto / cms / cms_rsa.c

/*
 * Copyright 2006-2023 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <assert.h>
#include <openssl/cms.h>
#include <openssl/err.h>
#include <openssl/core_names.h>
#include "crypto/asn1.h"
#include "crypto/rsa.h"
#include "crypto/evp.h"
#include "cms_local.h"

static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg)
{
    RSA_OAEP_PARAMS *oaep;

    oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
                                     alg->parameter);

    if (oaep == NULL)
        return NULL;

    if (oaep->maskGenFunc != NULL) {
        oaep->maskHash = ossl_x509_algor_mgf1_decode(oaep->maskGenFunc);
        if (oaep->maskHash == NULL) {
            RSA_OAEP_PARAMS_free(oaep);
            return NULL;
        }
    }
    return oaep;
}

static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
{
    EVP_PKEY_CTX *pkctx;
    X509_ALGOR *cmsalg;
    int nid;
    int rv = -1;
    unsigned char *label = NULL;
    int labellen = 0;
    const EVP_MD *mgf1md = NULL, *md = NULL;
    RSA_OAEP_PARAMS *oaep;

    pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
    if (pkctx == NULL)
        return 0;
    if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
        return -1;
    nid = OBJ_obj2nid(cmsalg->algorithm);
    if (nid == NID_rsaEncryption)
        return 1;
    if (nid != NID_rsaesOaep) {
        ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_ENCRYPTION_TYPE);
        return -1;
    }
    /* Decode OAEP parameters */
    oaep = rsa_oaep_decode(cmsalg);

    if (oaep == NULL) {
        ERR_raise(ERR_LIB_CMS, CMS_R_INVALID_OAEP_PARAMETERS);
        goto err;
    }

    mgf1md = ossl_x509_algor_get_md(oaep->maskHash);
    if (mgf1md == NULL)
        goto err;
    md = ossl_x509_algor_get_md(oaep->hashFunc);
    if (md == NULL)
        goto err;

    if (oaep->pSourceFunc != NULL) {
        X509_ALGOR *plab = oaep->pSourceFunc;

        if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
            ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_LABEL_SOURCE);
            goto err;
        }
        if (plab->parameter->type != V_ASN1_OCTET_STRING) {
            ERR_raise(ERR_LIB_CMS, CMS_R_INVALID_LABEL);
            goto err;
        }

        label = plab->parameter->value.octet_string->data;
        /* Stop label being freed when OAEP parameters are freed */
        plab->parameter->value.octet_string->data = NULL;
        labellen = plab->parameter->value.octet_string->length;
    }

    if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
        goto err;
    if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
        goto err;
    if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
        goto err;
    if (label != NULL
            && EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
        goto err;
    /* Carry on */
    rv = 1;

 err:
    RSA_OAEP_PARAMS_free(oaep);
    return rv;
}

static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
{
    const EVP_MD *md, *mgf1md;
    RSA_OAEP_PARAMS *oaep = NULL;
    ASN1_STRING *os = NULL;
    X509_ALGOR *alg;
    EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
    int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
    unsigned char *label;

    if (CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg) <= 0)
        return 0;
    if (pkctx != NULL) {
        if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
            return 0;
    }
    if (pad_mode == RSA_PKCS1_PADDING)
        return X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
                               V_ASN1_NULL, NULL);

    /* Not supported */
    if (pad_mode != RSA_PKCS1_OAEP_PADDING)
        return 0;
    if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
        goto err;
    if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
        goto err;
    labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
    if (labellen < 0)
        goto err;
    oaep = RSA_OAEP_PARAMS_new();
    if (oaep == NULL)
        goto err;
    if (!ossl_x509_algor_new_from_md(&oaep->hashFunc, md))
        goto err;
    if (!ossl_x509_algor_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
        goto err;
    if (labellen > 0) {
        ASN1_OCTET_STRING *los = ASN1_OCTET_STRING_new();

        if (los == NULL)
            goto err;
        if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
            ASN1_OCTET_STRING_free(los);
            goto err;
        }
        oaep->pSourceFunc = ossl_X509_ALGOR_from_nid(NID_pSpecified,
                                                     V_ASN1_OCTET_STRING, los);
        if (oaep->pSourceFunc == NULL)
            goto err;
    }
    /* create string with pss parameter encoding. */
    if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
        goto err;
    if (!X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os))
        goto err;
    os = NULL;
    rv = 1;
 err:
    RSA_OAEP_PARAMS_free(oaep);
    ASN1_STRING_free(os);
    return rv;
}

int ossl_cms_rsa_envelope(CMS_RecipientInfo *ri, int decrypt)
{
    assert(decrypt == 0 || decrypt == 1);

    if (decrypt == 1)
        return rsa_cms_decrypt(ri);

    if (decrypt == 0)
        return rsa_cms_encrypt(ri);

    ERR_raise(ERR_LIB_CMS, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
    return 0;
}

static int rsa_cms_sign(CMS_SignerInfo *si)
{
    int pad_mode = RSA_PKCS1_PADDING;
    X509_ALGOR *alg;
    EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
    unsigned char aid[128];
    const unsigned char *pp = aid;
    size_t aid_len = 0;
    OSSL_PARAM params[2];

    CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
    if (pkctx != NULL) {
        if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
            return 0;
    }
    if (pad_mode == RSA_PKCS1_PADDING)
        return X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
                               V_ASN1_NULL, NULL);

    /* We don't support it */
    if (pad_mode != RSA_PKCS1_PSS_PADDING)
        return 0;

    if (evp_pkey_ctx_is_legacy(pkctx)) {
        /* No provider -> we cannot query it for algorithm ID. */
        ASN1_STRING *os = NULL;

        os = ossl_rsa_ctx_to_pss_string(pkctx);
        if (os == NULL)
            return 0;
        return X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os);
    }

    params[0] = OSSL_PARAM_construct_octet_string(
        OSSL_SIGNATURE_PARAM_ALGORITHM_ID, aid, sizeof(aid));
    params[1] = OSSL_PARAM_construct_end();

    if (EVP_PKEY_CTX_get_params(pkctx, params) <= 0)
        return 0;
    if ((aid_len = params[0].return_size) == 0)
        return 0;
    if (d2i_X509_ALGOR(&alg, &pp, aid_len) == NULL)
        return 0;
    return 1;
}

static int rsa_cms_verify(CMS_SignerInfo *si)
{
    int nid, nid2;
    X509_ALGOR *alg;
    EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
    EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(pkctx);

    CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
    nid = OBJ_obj2nid(alg->algorithm);
    if (nid == EVP_PKEY_RSA_PSS)
        return ossl_rsa_pss_to_ctx(NULL, pkctx, alg, NULL) > 0;
    /* Only PSS allowed for PSS keys */
    if (EVP_PKEY_is_a(pkey, "RSA-PSS")) {
        ERR_raise(ERR_LIB_RSA, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
        return 0;
    }
    if (nid == NID_rsaEncryption)
        return 1;
    /* Workaround for some implementation that use a signature OID */
    if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
        if (nid2 == NID_rsaEncryption)
            return 1;
    }
    return 0;
}

int ossl_cms_rsa_sign(CMS_SignerInfo *si, int verify)
{
    assert(verify == 0 || verify == 1);

    if (verify == 1)
        return rsa_cms_verify(si);

    if (verify == 0)
        return rsa_cms_sign(si);

    ERR_raise(ERR_LIB_CMS, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
    return 0;
}
Commit	Line	Data
0b3a4ef2	1	/*
da1c088f	2	* Copyright 2006-2023 The OpenSSL Project Authors. All Rights Reserved.
0b3a4ef2 MC	3	*
	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
	5	* this file except in compliance with the License. You can obtain a copy
	6	* in the file LICENSE in the source distribution or at
	7	* https://www.openssl.org/source/license.html
	8	*/
	9
9ab7fe48	10	#include <assert.h>
0b3a4ef2 MC	11	#include <openssl/cms.h>
0b3a4ef2 MC	12	#include <openssl/err.h>
5a3bbe17	13	#include <openssl/core_names.h>
0b3a4ef2	14	#include "crypto/asn1.h"
9ab7fe48	15	#include "crypto/rsa.h"
3410a72d	16	#include "crypto/evp.h"
0b3a4ef2 MC	17	#include "cms_local.h"
0b3a4ef2 MC	18
0b3a4ef2 MC	19	static RSA_OAEP_PARAMS rsa_oaep_decode(const X509_ALGOR alg)
	20	{
	21	RSA_OAEP_PARAMS *oaep;
	22
	23	oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
	24	alg->parameter);
	25
	26	if (oaep == NULL)
	27	return NULL;
	28
	29	if (oaep->maskGenFunc != NULL) {
adf7e6d1	30	oaep->maskHash = ossl_x509_algor_mgf1_decode(oaep->maskGenFunc);
0b3a4ef2 MC	31	if (oaep->maskHash == NULL) {
	32	RSA_OAEP_PARAMS_free(oaep);
	33	return NULL;
	34	}
	35	}
	36	return oaep;
	37	}
	38
	39	static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
	40	{
	41	EVP_PKEY_CTX *pkctx;
	42	X509_ALGOR *cmsalg;
	43	int nid;
	44	int rv = -1;
	45	unsigned char *label = NULL;
	46	int labellen = 0;
	47	const EVP_MD mgf1md = NULL, md = NULL;
	48	RSA_OAEP_PARAMS *oaep;
	49
	50	pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
	51	if (pkctx == NULL)
	52	return 0;
	53	if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
	54	return -1;
	55	nid = OBJ_obj2nid(cmsalg->algorithm);
	56	if (nid == NID_rsaEncryption)
	57	return 1;
	58	if (nid != NID_rsaesOaep) {
9311d0c4	59	ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_ENCRYPTION_TYPE);
0b3a4ef2 MC	60	return -1;
	61	}
	62	/* Decode OAEP parameters */
	63	oaep = rsa_oaep_decode(cmsalg);
	64
	65	if (oaep == NULL) {
9311d0c4	66	ERR_raise(ERR_LIB_CMS, CMS_R_INVALID_OAEP_PARAMETERS);
0b3a4ef2 MC	67	goto err;
	68	}
	69
adf7e6d1	70	mgf1md = ossl_x509_algor_get_md(oaep->maskHash);
0b3a4ef2 MC	71	if (mgf1md == NULL)
0b3a4ef2 MC	72	goto err;
adf7e6d1	73	md = ossl_x509_algor_get_md(oaep->hashFunc);
0b3a4ef2 MC	74	if (md == NULL)
	75	goto err;
	76
	77	if (oaep->pSourceFunc != NULL) {
	78	X509_ALGOR *plab = oaep->pSourceFunc;
	79
	80	if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
9311d0c4	81	ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_LABEL_SOURCE);
0b3a4ef2 MC	82	goto err;
	83	}
	84	if (plab->parameter->type != V_ASN1_OCTET_STRING) {
9311d0c4	85	ERR_raise(ERR_LIB_CMS, CMS_R_INVALID_LABEL);
0b3a4ef2 MC	86	goto err;
	87	}
	88
	89	label = plab->parameter->value.octet_string->data;
	90	/* Stop label being freed when OAEP parameters are freed */
	91	plab->parameter->value.octet_string->data = NULL;
	92	labellen = plab->parameter->value.octet_string->length;
	93	}
	94
	95	if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
	96	goto err;
	97	if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
	98	goto err;
	99	if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
	100	goto err;
	101	if (label != NULL
	102	&& EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
	103	goto err;
	104	/* Carry on */
	105	rv = 1;
	106
	107	err:
	108	RSA_OAEP_PARAMS_free(oaep);
	109	return rv;
	110	}
	111
	112	static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
	113	{
	114	const EVP_MD md, mgf1md;
	115	RSA_OAEP_PARAMS *oaep = NULL;
	116	ASN1_STRING *os = NULL;
	117	X509_ALGOR *alg;
	118	EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
	119	int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
	120	unsigned char *label;
	121
	122	if (CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg) <= 0)
	123	return 0;
9ab7fe48	124	if (pkctx != NULL) {
0b3a4ef2 MC	125	if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
	126	return 0;
	127	}
04bc3c12 DDO	128	if (pad_mode == RSA_PKCS1_PADDING)
	129	return X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
	130	V_ASN1_NULL, NULL);
	131
0b3a4ef2 MC	132	/* Not supported */
	133	if (pad_mode != RSA_PKCS1_OAEP_PADDING)
	134	return 0;
	135	if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
	136	goto err;
	137	if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
	138	goto err;
	139	labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
	140	if (labellen < 0)
	141	goto err;
	142	oaep = RSA_OAEP_PARAMS_new();
	143	if (oaep == NULL)
	144	goto err;
adf7e6d1	145	if (!ossl_x509_algor_new_from_md(&oaep->hashFunc, md))
0b3a4ef2	146	goto err;
adf7e6d1	147	if (!ossl_x509_algor_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
0b3a4ef2 MC	148	goto err;
0b3a4ef2 MC	149	if (labellen > 0) {
9944df11	150	ASN1_OCTET_STRING *los = ASN1_OCTET_STRING_new();
9ab7fe48	151
0b3a4ef2 MC	152	if (los == NULL)
	153	goto err;
	154	if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
	155	ASN1_OCTET_STRING_free(los);
	156	goto err;
	157	}
9944df11 DDO	158	oaep->pSourceFunc = ossl_X509_ALGOR_from_nid(NID_pSpecified,
	159	V_ASN1_OCTET_STRING, los);
	160	if (oaep->pSourceFunc == NULL)
	161	goto err;
0b3a4ef2 MC	162	}
	163	/* create string with pss parameter encoding. */
	164	if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
04bc3c12 DDO	165	goto err;
	166	if (!X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os))
	167	goto err;
0b3a4ef2 MC	168	os = NULL;
	169	rv = 1;
	170	err:
	171	RSA_OAEP_PARAMS_free(oaep);
	172	ASN1_STRING_free(os);
	173	return rv;
	174	}
	175
53155f1c	176	int ossl_cms_rsa_envelope(CMS_RecipientInfo *ri, int decrypt)
0b3a4ef2	177	{
9ab7fe48 MC	178	assert(decrypt == 0 \|\| decrypt == 1);
9ab7fe48 MC	179
0b3a4ef2 MC	180	if (decrypt == 1)
0b3a4ef2 MC	181	return rsa_cms_decrypt(ri);
9ab7fe48 MC	182
9ab7fe48 MC	183	if (decrypt == 0)
0b3a4ef2 MC	184	return rsa_cms_encrypt(ri);
0b3a4ef2 MC	185
9311d0c4	186	ERR_raise(ERR_LIB_CMS, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
0b3a4ef2	187	return 0;
9ab7fe48 MC	188	}
	189
	190	static int rsa_cms_sign(CMS_SignerInfo *si)
	191	{
	192	int pad_mode = RSA_PKCS1_PADDING;
	193	X509_ALGOR *alg;
	194	EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
5a3bbe17 CL	195	unsigned char aid[128];
	196	const unsigned char *pp = aid;
	197	size_t aid_len = 0;
	198	OSSL_PARAM params[2];
9ab7fe48 MC	199
	200	CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
	201	if (pkctx != NULL) {
	202	if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
	203	return 0;
	204	}
04bc3c12 DDO	205	if (pad_mode == RSA_PKCS1_PADDING)
	206	return X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
	207	V_ASN1_NULL, NULL);
	208
9ab7fe48 MC	209	/* We don't support it */
	210	if (pad_mode != RSA_PKCS1_PSS_PADDING)
	211	return 0;
5a3bbe17	212
3410a72d TM	213	if (evp_pkey_ctx_is_legacy(pkctx)) {
	214	/* No provider -> we cannot query it for algorithm ID. */
	215	ASN1_STRING *os = NULL;
	216
	217	os = ossl_rsa_ctx_to_pss_string(pkctx);
	218	if (os == NULL)
	219	return 0;
	220	return X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os);
	221	}
	222
5a3bbe17 CL	223	params[0] = OSSL_PARAM_construct_octet_string(
	224	OSSL_SIGNATURE_PARAM_ALGORITHM_ID, aid, sizeof(aid));
	225	params[1] = OSSL_PARAM_construct_end();
	226
	227	if (EVP_PKEY_CTX_get_params(pkctx, params) <= 0)
9ab7fe48	228	return 0;
5a3bbe17 CL	229	if ((aid_len = params[0].return_size) == 0)
	230	return 0;
	231	if (d2i_X509_ALGOR(&alg, &pp, aid_len) == NULL)
	232	return 0;
	233	return 1;
9ab7fe48 MC	234	}
	235
	236	static int rsa_cms_verify(CMS_SignerInfo *si)
	237	{
	238	int nid, nid2;
	239	X509_ALGOR *alg;
	240	EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
	241	EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(pkctx);
	242
	243	CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
	244	nid = OBJ_obj2nid(alg->algorithm);
	245	if (nid == EVP_PKEY_RSA_PSS)
643ce310	246	return ossl_rsa_pss_to_ctx(NULL, pkctx, alg, NULL) > 0;
9ab7fe48 MC	247	/* Only PSS allowed for PSS keys */
9ab7fe48 MC	248	if (EVP_PKEY_is_a(pkey, "RSA-PSS")) {
9311d0c4	249	ERR_raise(ERR_LIB_RSA, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
9ab7fe48 MC	250	return 0;
	251	}
	252	if (nid == NID_rsaEncryption)
	253	return 1;
	254	/* Workaround for some implementation that use a signature OID */
	255	if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
	256	if (nid2 == NID_rsaEncryption)
	257	return 1;
	258	}
	259	return 0;
	260	}
	261
53155f1c	262	int ossl_cms_rsa_sign(CMS_SignerInfo *si, int verify)
9ab7fe48 MC	263	{
	264	assert(verify == 0 \|\| verify == 1);
	265
	266	if (verify == 1)
	267	return rsa_cms_verify(si);
	268
	269	if (verify == 0)
	270	return rsa_cms_sign(si);
	271
9311d0c4	272	ERR_raise(ERR_LIB_CMS, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
9ab7fe48 MC	273	return 0;
9ab7fe48 MC	274	}