cms_smime.c

OpenSSL 0.9.8k 最新版OpenSSL

			{
			CMSerr(CMS_F_CMS_VERIFY,ERR_R_MALLOC_FAILURE);
			return 0;
			}
		}
	else
		tmpin = dcont;
		

	cmsbio=CMS_dataInit(cms, tmpin);
	if (!cmsbio)
		goto err;

	if (!cms_copy_content(out, cmsbio, flags))
		goto err;

	if (!(flags & CMS_NO_CONTENT_VERIFY))
		{
		for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
			{
			si = sk_CMS_SignerInfo_value(sinfos, i);
			if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0)
				{
				CMSerr(CMS_F_CMS_VERIFY,
					CMS_R_CONTENT_VERIFY_ERROR);
				goto err;
				}
			}
		}

	ret = 1;

	err:
	
	if (dcont && (tmpin == dcont))
		do_free_upto(cmsbio, dcont);
	else
		BIO_free_all(cmsbio);

	if (cms_certs)
		sk_X509_pop_free(cms_certs, X509_free);
	if (crls)
		sk_X509_CRL_pop_free(crls, X509_CRL_free);

	return ret;
	}

int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
			STACK_OF(X509) *certs,
			X509_STORE *store, unsigned int flags)
	{
	int r;
	r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
	if (r <= 0)
		return r;
	return cms_Receipt_verify(rcms, ocms);
	}

CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
						BIO *data, unsigned int flags)
	{
	CMS_ContentInfo *cms;
	int i;

	cms = CMS_ContentInfo_new();
	if (!cms || !CMS_SignedData_init(cms))
		goto merr;

	if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags))
		{
		CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
		goto err;
		}

	for (i = 0; i < sk_X509_num(certs); i++)
		{
		X509 *x = sk_X509_value(certs, i);
		if (!CMS_add1_cert(cms, x))
			goto merr;
		}

	if(!(flags & CMS_DETACHED))
		{
		flags &= ~CMS_STREAM;
		CMS_set_detached(cms, 0);
		}

	if ((flags & (CMS_STREAM|CMS_PARTIAL))
		|| CMS_final(cms, data, NULL, flags))
		return cms;
	else
		goto err;

	merr:
	CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);

	err:
	if (cms)
		CMS_ContentInfo_free(cms);
	return NULL;
	}

CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
					X509 *signcert, EVP_PKEY *pkey,
					STACK_OF(X509) *certs,
					unsigned int flags)
	{
	CMS_SignerInfo *rct_si;
	CMS_ContentInfo *cms = NULL;
	ASN1_OCTET_STRING **pos, *os;
	BIO *rct_cont = NULL;
	int r = 0;

	flags &= ~CMS_STREAM;
	/* Not really detached but avoids content being allocated */
	flags |= CMS_PARTIAL|CMS_BINARY|CMS_DETACHED;
	if (!pkey || !signcert)
		{
		CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
		return NULL;
		}

	/* Initialize signed data */

	cms = CMS_sign(NULL, NULL, certs, NULL, flags);
	if (!cms)
		goto err;

	/* Set inner content type to signed receipt */
	if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
		goto err;

	rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
	if (!rct_si)
		{
		CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
		goto err;
		}

	os = cms_encode_Receipt(si);

	if (!os)
		goto err;

	/* Set content to digest */
	rct_cont = BIO_new_mem_buf(os->data, os->length);
	if (!rct_cont)
		goto err;

	/* Add msgSigDigest attribute */

	if (!cms_msgSigDigest_add1(rct_si, si))
		goto err;

	/* Finalize structure */
	if (!CMS_final(cms, rct_cont, NULL, flags))
		goto err;

	/* Set embedded content */
	pos = CMS_get0_content(cms);
	*pos = os;

	r = 1;

	err:
	if (rct_cont)
		BIO_free(rct_cont);
	if (r)
		return cms;
	CMS_ContentInfo_free(cms);
	return NULL;

	}

CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
				const EVP_CIPHER *cipher, unsigned int flags)
	{
	CMS_ContentInfo *cms;
	int i;
	X509 *recip;
	cms = CMS_EnvelopedData_create(cipher);
	if (!cms)
		goto merr;
	for (i = 0; i < sk_X509_num(certs); i++)
		{
		recip = sk_X509_value(certs, i);
		if (!CMS_add1_recipient_cert(cms, recip, flags))
			{
			CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
			goto err;
			}
		}

	if(!(flags & CMS_DETACHED))
		{
		flags &= ~CMS_STREAM;
		CMS_set_detached(cms, 0);
		}

	if ((flags & (CMS_STREAM|CMS_PARTIAL))
		|| CMS_final(cms, data, NULL, flags))
		return cms;
	else
		goto err;

	merr:
	CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
	err:
	if (cms)
		CMS_ContentInfo_free(cms);
	return NULL;
	}

int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
	{
	STACK_OF(CMS_RecipientInfo) *ris;
	CMS_RecipientInfo *ri;
	int i, r;
	ris = CMS_get0_RecipientInfos(cms);
	for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
		{
		ri = sk_CMS_RecipientInfo_value(ris, i);
		if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_TRANS)
				continue;
		/* If we have a cert try matching RecipientInfo
		 * otherwise try them all.
		 */
		if (!cert || (CMS_RecipientInfo_ktri_cert_cmp(ri, cert) == 0))
			{
			CMS_RecipientInfo_set0_pkey(ri, pk);
			r = CMS_RecipientInfo_decrypt(cms, ri);
			CMS_RecipientInfo_set0_pkey(ri, NULL);
			if (r > 0)
				return 1;
			if (cert)
				{
				CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
						CMS_R_DECRYPT_ERROR);
				return 0;
				}
			ERR_clear_error();
			}
		}

	CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
	return 0;

	}

int CMS_decrypt_set1_key(CMS_ContentInfo *cms, 
				unsigned char *key, size_t keylen,
				unsigned char *id, size_t idlen)
	{
	STACK_OF(CMS_RecipientInfo) *ris;
	CMS_RecipientInfo *ri;
	int i, r;
	ris = CMS_get0_RecipientInfos(cms);
	for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
		{
		ri = sk_CMS_RecipientInfo_value(ris, i);
		if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
				continue;

		/* If we have an id try matching RecipientInfo
		 * otherwise try them all.
		 */
		if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0))
			{
			CMS_RecipientInfo_set0_key(ri, key, keylen);
			r = CMS_RecipientInfo_decrypt(cms, ri);
			CMS_RecipientInfo_set0_key(ri, NULL, 0);
			if (r > 0)
				return 1;
			if (id)
				{
				CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY,
						CMS_R_DECRYPT_ERROR);
				return 0;
				}
			ERR_clear_error();
			}
		}

	CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
	return 0;

	}
	
int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
				BIO *dcont, BIO *out,
				unsigned int flags)
	{
	int r;
	BIO *cont;
	if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped)
		{
		CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
		return 0;
		}
	if (!dcont && !check_content(cms))
		return 0;
	if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
		return 0;

	cont = CMS_dataInit(cms, dcont);
	if (!cont)
		return 0;
	r = cms_copy_content(out, cont, flags);
	do_free_upto(cont, dcont);
	return r;
	}

int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
	{
	BIO *cmsbio;
	int ret = 0;
	if (!(cmsbio = CMS_dataInit(cms, dcont)))
		{
		CMSerr(CMS_F_CMS_FINAL,ERR_R_MALLOC_FAILURE);
		return 0;
		}

	SMIME_crlf_copy(data, cmsbio, flags);

	(void)BIO_flush(cmsbio);


        if (!CMS_dataFinal(cms, cmsbio))
		{
		CMSerr(CMS_F_CMS_FINAL,CMS_R_CMS_DATAFINAL_ERROR);
		goto err;
		}

	ret = 1;

	err:
	do_free_upto(cmsbio, dcont);

	return ret;

	}

#ifdef ZLIB

int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
							unsigned int flags)
	{
	BIO *cont;
	int r;
	if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData)
		{
		CMSerr(CMS_F_CMS_UNCOMPRESS,
					CMS_R_TYPE_NOT_COMPRESSED_DATA);
		return 0;
		}

	if (!dcont && !check_content(cms))
		return 0;

	cont = CMS_dataInit(cms, dcont);
	if (!cont)
		return 0;
	r = cms_copy_content(out, cont, flags);
	do_free_upto(cont, dcont);
	return r;
	}

CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
	{
	CMS_ContentInfo *cms;
	if (comp_nid <= 0)
		comp_nid = NID_zlib_compression;
	cms = cms_CompressedData_create(comp_nid);
	if (!cms)
		return NULL;

	if(!(flags & CMS_DETACHED))
		{
		flags &= ~CMS_STREAM;
		CMS_set_detached(cms, 0);
		}

	if (CMS_final(cms, in, NULL, flags))
		return cms;

	CMS_ContentInfo_free(cms);
	return NULL;
	}

#else

int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
							unsigned int flags)
	{
	CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
	return 0;
	}

CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
	{
	CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
	return NULL;
	}

#endif