/src/rauc/subprojects/openssl-3.0.8/crypto/cms/cms_rsa.c

Source (jump to first uncovered line)
/*
 * Copyright 2006-2021 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 "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) {
        X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
        return 1;
    }
    /* 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;

        oaep->pSourceFunc = X509_ALGOR_new();
        if (oaep->pSourceFunc == NULL)
            goto err;
        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;
        }
        X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
                        V_ASN1_OCTET_STRING, los);
    }
    /* create string with pss parameter encoding. */
    if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
         goto err;
    X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
    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) {
        X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
        return 1;
    }
    /* We don't support it */
    if (pad_mode != RSA_PKCS1_PSS_PADDING)
        return 0;

    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;
}

Coverage Report

Created: 2025-07-23 06:49

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 2006-2021 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		#include <assert.h>
11		#include <openssl/cms.h>
12		#include <openssl/err.h>
13		#include <openssl/core_names.h>
14		#include "crypto/asn1.h"
15		#include "crypto/rsa.h"
16		#include "cms_local.h"
17
18		static RSA_OAEP_PARAMS rsa_oaep_decode(const X509_ALGOR alg)
19	0	{
20	0	RSA_OAEP_PARAMS *oaep;
21
22	0	oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
23	0	alg->parameter);
24
25	0	if (oaep == NULL)
26	0	return NULL;
27
28	0	if (oaep->maskGenFunc != NULL) {
29	0	oaep->maskHash = ossl_x509_algor_mgf1_decode(oaep->maskGenFunc);
30	0	if (oaep->maskHash == NULL) {
31	0	RSA_OAEP_PARAMS_free(oaep);
32	0	return NULL;
33	0	}
34	0	}
35	0	return oaep;
36	0	}
37
38		static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
39	0	{
40	0	EVP_PKEY_CTX *pkctx;
41	0	X509_ALGOR *cmsalg;
42	0	int nid;
43	0	int rv = -1;
44	0	unsigned char *label = NULL;
45	0	int labellen = 0;
46	0	const EVP_MD mgf1md = NULL, md = NULL;
47	0	RSA_OAEP_PARAMS *oaep;
48
49	0	pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
50	0	if (pkctx == NULL)
51	0	return 0;
52	0	if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
53	0	return -1;
54	0	nid = OBJ_obj2nid(cmsalg->algorithm);
55	0	if (nid == NID_rsaEncryption)
56	0	return 1;
57	0	if (nid != NID_rsaesOaep) {
58	0	ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_ENCRYPTION_TYPE);
59	0	return -1;
60	0	}
61		/* Decode OAEP parameters */
62	0	oaep = rsa_oaep_decode(cmsalg);
63
64	0	if (oaep == NULL) {
65	0	ERR_raise(ERR_LIB_CMS, CMS_R_INVALID_OAEP_PARAMETERS);
66	0	goto err;
67	0	}
68
69	0	mgf1md = ossl_x509_algor_get_md(oaep->maskHash);
70	0	if (mgf1md == NULL)
71	0	goto err;
72	0	md = ossl_x509_algor_get_md(oaep->hashFunc);
73	0	if (md == NULL)
74	0	goto err;
75
76	0	if (oaep->pSourceFunc != NULL) {
77	0	X509_ALGOR *plab = oaep->pSourceFunc;
78
79	0	if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
80	0	ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_LABEL_SOURCE);
81	0	goto err;
82	0	}
83	0	if (plab->parameter->type != V_ASN1_OCTET_STRING) {
84	0	ERR_raise(ERR_LIB_CMS, CMS_R_INVALID_LABEL);
85	0	goto err;
86	0	}
87
88	0	label = plab->parameter->value.octet_string->data;
89		/* Stop label being freed when OAEP parameters are freed */
90	0	plab->parameter->value.octet_string->data = NULL;
91	0	labellen = plab->parameter->value.octet_string->length;
92	0	}
93
94	0	if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
95	0	goto err;
96	0	if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
97	0	goto err;
98	0	if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
99	0	goto err;
100	0	if (label != NULL
101	0	&& EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
102	0	goto err;
103		/* Carry on */
104	0	rv = 1;
105
106	0	err:
107	0	RSA_OAEP_PARAMS_free(oaep);
108	0	return rv;
109	0	}
110
111		static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
112	0	{
113	0	const EVP_MD md, mgf1md;
114	0	RSA_OAEP_PARAMS *oaep = NULL;
115	0	ASN1_STRING *os = NULL;
116	0	X509_ALGOR *alg;
117	0	EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
118	0	int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
119	0	unsigned char *label;
120
121	0	if (CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg) <= 0)
122	0	return 0;
123	0	if (pkctx != NULL) {
124	0	if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
125	0	return 0;
126	0	}
127	0	if (pad_mode == RSA_PKCS1_PADDING) {
128	0	X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
129	0	return 1;
130	0	}
131		/* Not supported */
132	0	if (pad_mode != RSA_PKCS1_OAEP_PADDING)
133	0	return 0;
134	0	if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
135	0	goto err;
136	0	if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
137	0	goto err;
138	0	labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
139	0	if (labellen < 0)
140	0	goto err;
141	0	oaep = RSA_OAEP_PARAMS_new();
142	0	if (oaep == NULL)
143	0	goto err;
144	0	if (!ossl_x509_algor_new_from_md(&oaep->hashFunc, md))
145	0	goto err;
146	0	if (!ossl_x509_algor_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
147	0	goto err;
148	0	if (labellen > 0) {
149	0	ASN1_OCTET_STRING *los;
150
151	0	oaep->pSourceFunc = X509_ALGOR_new();
152	0	if (oaep->pSourceFunc == NULL)
153	0	goto err;
154	0	los = ASN1_OCTET_STRING_new();
155	0	if (los == NULL)
156	0	goto err;
157	0	if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
158	0	ASN1_OCTET_STRING_free(los);
159	0	goto err;
160	0	}
161	0	X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
162	0	V_ASN1_OCTET_STRING, los);
163	0	}
164		/* create string with pss parameter encoding. */
165	0	if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
166	0	goto err;
167	0	X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
168	0	os = NULL;
169	0	rv = 1;
170	0	err:
171	0	RSA_OAEP_PARAMS_free(oaep);
172	0	ASN1_STRING_free(os);
173	0	return rv;
174	0	}
175
176		int ossl_cms_rsa_envelope(CMS_RecipientInfo *ri, int decrypt)
177	0	{
178	0	assert(decrypt == 0 \|\| decrypt == 1);
179
180	0	if (decrypt == 1)
181	0	return rsa_cms_decrypt(ri);
182
183	0	if (decrypt == 0)
184	0	return rsa_cms_encrypt(ri);
185
186	0	ERR_raise(ERR_LIB_CMS, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
187	0	return 0;
188	0	}
189
190		static int rsa_cms_sign(CMS_SignerInfo *si)
191	0	{
192	0	int pad_mode = RSA_PKCS1_PADDING;
193	0	X509_ALGOR *alg;
194	0	EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
195	0	unsigned char aid[128];
196	0	const unsigned char *pp = aid;
197	0	size_t aid_len = 0;
198	0	OSSL_PARAM params[2];
199
200	0	CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
201	0	if (pkctx != NULL) {
202	0	if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
203	0	return 0;
204	0	}
205	0	if (pad_mode == RSA_PKCS1_PADDING) {
206	0	X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
207	0	return 1;
208	0	}
209		/* We don't support it */
210	0	if (pad_mode != RSA_PKCS1_PSS_PADDING)
211	0	return 0;
212
213	0	params[0] = OSSL_PARAM_construct_octet_string(
214	0	OSSL_SIGNATURE_PARAM_ALGORITHM_ID, aid, sizeof(aid));
215	0	params[1] = OSSL_PARAM_construct_end();
216
217	0	if (EVP_PKEY_CTX_get_params(pkctx, params) <= 0)
218	0	return 0;
219	0	if ((aid_len = params[0].return_size) == 0)
220	0	return 0;
221	0	if (d2i_X509_ALGOR(&alg, &pp, aid_len) == NULL)
222	0	return 0;
223	0	return 1;
224	0	}
225
226		static int rsa_cms_verify(CMS_SignerInfo *si)
227	0	{
228	0	int nid, nid2;
229	0	X509_ALGOR *alg;
230	0	EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
231	0	EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(pkctx);
232
233	0	CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
234	0	nid = OBJ_obj2nid(alg->algorithm);
235	0	if (nid == EVP_PKEY_RSA_PSS)
236	0	return ossl_rsa_pss_to_ctx(NULL, pkctx, alg, NULL) > 0;
237		/* Only PSS allowed for PSS keys */
238	0	if (EVP_PKEY_is_a(pkey, "RSA-PSS")) {
239	0	ERR_raise(ERR_LIB_RSA, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
240	0	return 0;
241	0	}
242	0	if (nid == NID_rsaEncryption)
243	0	return 1;
244		/* Workaround for some implementation that use a signature OID */
245	0	if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
246	0	if (nid2 == NID_rsaEncryption)
247	0	return 1;
248	0	}
249	0	return 0;
250	0	}
251
252		int ossl_cms_rsa_sign(CMS_SignerInfo *si, int verify)
253	0	{
254	0	assert(verify == 0 \|\| verify == 1);
255
256	0	if (verify == 1)
257	0	return rsa_cms_verify(si);
258
259	0	if (verify == 0)
260	0	return rsa_cms_sign(si);
261
262	0	ERR_raise(ERR_LIB_CMS, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
263	0	return 0;
264	0	}