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cms.c
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/*
* Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
*
* http://www.apache.org/licenses/LICENSE-2.0
*/
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <gmssl/asn1.h>
#include <gmssl/aes.h>
#include <gmssl/sm4.h>
#include <gmssl/sm3.h>
#include <gmssl/sm2.h>
#include <gmssl/digest.h>
#include <gmssl/error.h>
#include <gmssl/x509.h>
#include <gmssl/x509_alg.h>
#include <gmssl/x509_ext.h>
#include <gmssl/x509_crl.h>
#include <gmssl/rand.h>
#include <gmssl/pem.h>
#include <gmssl/cms.h>
static uint32_t oid_cms_data[] = { oid_sm2_cms,1 };
static uint32_t oid_cms_signed_data[] = { oid_sm2_cms,2 };
static uint32_t oid_cms_enveloped_data[] = { oid_sm2_cms,3 };
static uint32_t oid_cms_signed_and_enveloped_data[] = { oid_sm2_cms,4 };
static uint32_t oid_cms_encrypted_data[] = { oid_sm2_cms,5 };
static uint32_t oid_cms_key_agreement_info[] = { oid_sm2_cms,6 };
#define OID_CMS_CONUNT (sizeof(oid_cms_data)/sizeof(int))
static const ASN1_OID_INFO cms_content_types[] = {
{ OID_cms_data, "data", oid_cms_data, OID_CMS_CONUNT },
{ OID_cms_signed_data, "signedData", oid_cms_signed_data, OID_CMS_CONUNT },
{ OID_cms_enveloped_data, "envelopedData", oid_cms_enveloped_data, OID_CMS_CONUNT },
{ OID_cms_signed_and_enveloped_data, "signedAndEnvelopedData", oid_cms_signed_and_enveloped_data, OID_CMS_CONUNT },
{ OID_cms_encrypted_data, "encryptedData", oid_cms_encrypted_data, OID_CMS_CONUNT },
{ OID_cms_key_agreement_info, "keyAgreementInfo", oid_cms_key_agreement_info, OID_CMS_CONUNT }
};
static const size_t cms_content_types_count =
sizeof(cms_content_types)/sizeof(cms_content_types[0]);
const char *cms_content_type_name(int oid)
{
const ASN1_OID_INFO *info;
if (!(info = asn1_oid_info_from_oid(cms_content_types, cms_content_types_count, oid))) {
error_print();
return NULL;
}
return info->name;
}
int cms_content_type_from_name(const char *name)
{
const ASN1_OID_INFO *info;
if (!(info = asn1_oid_info_from_name(cms_content_types, cms_content_types_count, name))) {
error_print();
return OID_undef;
}
return info->oid;
}
int cms_content_type_to_der(int oid, uint8_t **out, size_t *outlen)
{
const ASN1_OID_INFO *info;
if (oid == -1) {
return 0;
}
if (!(info = asn1_oid_info_from_oid(cms_content_types, cms_content_types_count, oid))) {
error_print();
return -1;
}
if (asn1_object_identifier_to_der(info->nodes, info->nodes_cnt, out, outlen) != 1) {
error_print();
return -1;
}
return 1;
}
int cms_content_type_from_der(int *oid, const uint8_t **in, size_t *inlen)
{
int ret;
const ASN1_OID_INFO *info;
if ((ret = asn1_oid_info_from_der(&info, cms_content_types, cms_content_types_count, in, inlen)) != 1) {
if (ret < 0) error_print();
else *oid = -1;
return ret;
}
*oid = info->oid;
return 1;
}
/*
static int cms_content_info_data_header_to_der(size_t dlen, uint8_t **out, size_t *outlen)
{
uint8_t d[1];
size_t len = 0;
size_t content_len = 0;
if (asn1_octet_string_to_der(p, dlen, NULL, &content_len) != 1
|| cms_content_type_to_der(OID_cms_data, out, outlen) != 1
|| asn1_explicit_header_to_der(0, content_len, out, outlen) < 0
|| asn1_octet_string_to_der(dlen, out, outlen) < 0) {
error_print();
return -1;
}
return 1;
}
*/
int cms_content_info_header_to_der(int content_type, size_t content_len, uint8_t **out, size_t *outlen)
{
size_t len = content_len; // 注意：由于header_to_der没有输出数据，因此需要加上数据的长度，header length 才是正确的值
/*
if (content_type == OID_cms_data) {
return cms_content_info_data_header_to_der(content_len, out, outlen);
}
*/
if (cms_content_type_to_der(content_type, NULL, &len) != 1
|| asn1_explicit_header_to_der(0, content_len, NULL, &len) < 0
|| asn1_sequence_header_to_der(len, out, outlen) != 1
|| cms_content_type_to_der(content_type, out, outlen) != 1
|| asn1_explicit_header_to_der(0, content_len, out, outlen) < 0) {
error_print();
return -1;
}
return 1;
}
static int cms_content_info_data_to_der(const uint8_t *d, size_t dlen, uint8_t **out, size_t *outlen)
{
size_t len = 0;
size_t content_len = 0;
if (asn1_octet_string_to_der(d, dlen, NULL, &content_len) != 1
|| cms_content_type_to_der(OID_cms_data, NULL, &len) != 1
|| asn1_explicit_to_der(0, d, content_len, NULL, &len) != 1
|| asn1_sequence_header_to_der(len, out, outlen) != 1
|| cms_content_type_to_der(OID_cms_data, out, outlen) != 1
|| asn1_explicit_header_to_der(0, content_len, out, outlen) != 1
|| asn1_octet_string_to_der(d, dlen, out, outlen) != 1) {
error_print();
return -1;
}
return 1;
}
int cms_content_info_to_der(
int content_type, const uint8_t *content, size_t content_len,
uint8_t **out, size_t *outlen)
{
size_t len = 0;
if (content_type == OID_cms_data) {
return cms_content_info_data_to_der(content, content_len, out, outlen);
}
if (cms_content_type_to_der(content_type, NULL, &len) != 1
|| asn1_explicit_to_der(0, content, content_len, NULL, &len) < 0
|| asn1_sequence_header_to_der(len, out, outlen) != 1
|| cms_content_type_to_der(content_type, out, outlen) != 1
|| asn1_explicit_to_der(0, content, content_len, out, outlen) < 0) {
error_print();
return -1;
}
return 1;
}
int cms_content_info_from_der(
int *content_type,
const uint8_t **content, size_t *content_len,
const uint8_t **in, size_t *inlen)
{
int ret;
const uint8_t *d;
size_t dlen;
if ((ret = asn1_sequence_from_der(&d, &dlen, in, inlen)) != 1) {
if (ret < 0) error_print();
return ret;
}
if (cms_content_type_from_der(content_type, &d, &dlen) != 1
|| asn1_explicit_from_der(0, content, content_len, &d, &dlen) < 0
|| asn1_length_is_zero(dlen) != 1) {
error_print();
return -1;
}
return 1;
}
int cms_content_info_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *d, size_t dlen)
{
int ret;
int content_type;
const uint8_t *content;
size_t content_len;
const uint8_t *p;
size_t len;
format_print(fp, fmt, ind, "%s\n", label);
ind += 4;
if (cms_content_type_from_der(&content_type, &d, &dlen) != 1) goto err;
format_print(fp, fmt, ind, "contentType: %s\n", cms_content_type_name(content_type));
/*
if (content_type == OID_cms_data) {
if (asn1_octet_string_from_der(&p, &len, &content, &content_len) != 1) goto err;
} else {
if (asn1_sequence_from_der(&p, &len, &content, &content_len) != 1) goto err;
}
*/
//format_bytes(stderr, 0, 0, "content", d, dlen);
if ((ret = asn1_explicit_from_der(0, &content, &content_len, &d, &dlen)) < 0) { error_print(); goto err; }
if (ret == 0) { error_print(); goto err; }
if (content_type == OID_cms_data) {
if (asn1_octet_string_from_der(&p, &len, &content, &content_len) != 1
|| asn1_length_is_zero(content_len) != 1) {
error_print();
return -1;
}
format_bytes(fp, fmt, ind, "content", p, len);
return 1;
}
if (asn1_sequence_from_der(&p, &len, &content, &content_len) != 1) { error_print(); goto err; }
switch (content_type) {
//case OID_cms_data: format_bytes(fp, fmt, ind, "content", p, len); break;
case OID_cms_signed_data: cms_signed_data_print(fp, fmt, ind, "content", p, len); break;
case OID_cms_enveloped_data: cms_enveloped_data_print(fp, fmt, ind, "content", p, len); break;
case OID_cms_signed_and_enveloped_data: cms_signed_and_enveloped_data_print(fp, fmt, ind, "content", p, len); break;
case OID_cms_encrypted_data: cms_encrypted_data_print(fp, fmt, ind, "content", p, len); break;
case OID_cms_key_agreement_info: cms_key_agreement_info_print(fp, fmt, ind, "content", p, len); break;
}
if (asn1_length_is_zero(content_len) != 1) goto err;
if (asn1_length_is_zero(dlen) != 1) goto err;
return 1;
err:
error_print();
return -1;
}
int cms_enced_content_info_to_der(
int content_type,
int enc_algor, const uint8_t *enc_iv, size_t enc_iv_len,
const uint8_t *enced_content, size_t enced_content_len,
const uint8_t *shared_info1, size_t shared_info1_len,
const uint8_t *shared_info2, size_t shared_info2_len,
uint8_t **out, size_t *outlen)
{
size_t len = 0;
if (cms_content_type_to_der(content_type, NULL, &len) != 1
|| x509_encryption_algor_to_der(enc_algor, enc_iv, enc_iv_len, NULL, &len) != 1
|| asn1_implicit_octet_string_to_der(0, enced_content, enced_content_len, NULL, &len) < 0
|| asn1_implicit_octet_string_to_der(1, shared_info1, shared_info1_len, NULL, &len) < 0
|| asn1_implicit_octet_string_to_der(2, shared_info2, shared_info2_len, NULL, &len) < 0
|| asn1_sequence_header_to_der(len, out, outlen) != 1
|| cms_content_type_to_der(content_type, out, outlen) != 1
|| x509_encryption_algor_to_der(enc_algor, enc_iv, enc_iv_len, out, outlen) != 1
|| asn1_implicit_octet_string_to_der(0, enced_content, enced_content_len, out, outlen) < 0
|| asn1_implicit_octet_string_to_der(1, shared_info1, shared_info1_len, out, outlen) < 0
|| asn1_implicit_octet_string_to_der(2, shared_info2, shared_info2_len, out, outlen) < 0) {
error_print();
return -1;
}
return 1;
}
int cms_enced_content_info_from_der(
int *content_type,
int *enc_algor, const uint8_t **enc_iv, size_t *enc_iv_len,
const uint8_t **enced_content, size_t *enced_content_len,
const uint8_t **shared_info1, size_t *shared_info1_len,
const uint8_t **shared_info2, size_t *shared_info2_len,
const uint8_t **in, size_t *inlen)
{
int ret;
const uint8_t *d;
size_t dlen;
if ((ret = asn1_sequence_from_der(&d, &dlen, in, inlen)) != 1) {
if (ret < 0) error_print();
return ret;
}
if (cms_content_type_from_der(content_type, &d, &dlen) != 1
|| x509_encryption_algor_from_der(enc_algor, enc_iv, enc_iv_len, &d, &dlen) != 1
|| asn1_implicit_octet_string_from_der(0, enced_content, enced_content_len, &d, &dlen) < 0
|| asn1_implicit_octet_string_from_der(1, shared_info1, shared_info1_len, &d, &dlen) < 0
|| asn1_implicit_octet_string_from_der(2, shared_info2, shared_info2_len, &d, &dlen) < 0
|| asn1_length_is_zero(dlen) != 1) {
error_print();
return -1;
}
return 1;
}
int cms_enced_content_info_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *d, size_t dlen)
{
int ret, val;
const uint8_t *p;
size_t len;
format_print(fp, fmt, ind, "%s\n", label);
ind += 4;
if (cms_content_type_from_der(&val, &d, &dlen) != 1) goto err;
format_print(fp, fmt, ind, "contentType: %s\n", cms_content_type_name(val));
if (asn1_sequence_from_der(&p, &len, &d, &dlen) != 1) goto err;
x509_encryption_algor_print(fp, fmt, ind, "contentEncryptionAlgorithm", p, len);
if ((ret = asn1_implicit_octet_string_from_der(0, &p, &len, &d, &dlen)) < 0) goto err;
if (ret) format_bytes(fp, fmt, ind, "encryptedContent", p, len);
if ((ret = asn1_implicit_octet_string_from_der(1, &p, &len, &d, &dlen)) < 0) goto err;
if (ret) format_bytes(fp, fmt, ind, "sharedInfo1", p, len);
if ((ret = asn1_implicit_octet_string_from_der(2, &p, &len, &d, &dlen)) < 0) goto err;
if (ret) format_bytes(fp, fmt, ind, "sharedInfo2", p, len);
if (asn1_length_is_zero(dlen) != 1) goto err;
return 1;
err:
error_print();
return -1;
}
int cms_enced_content_info_encrypt_to_der(
int enc_algor, const uint8_t *key, size_t keylen, const uint8_t *iv, size_t ivlen,
int content_type, const uint8_t *content, size_t content_len,
const uint8_t *shared_info1, size_t shared_info1_len,
const uint8_t *shared_info2, size_t shared_info2_len,
uint8_t **out, size_t *outlen)
{
int ret;
SM4_KEY sm4_key;
uint8_t* enced_content = NULL;
size_t enced_content_len = 100; // FIXME: why 100?
if (!(enced_content = malloc(32 + content_len))) {
error_print();
return -1;
}
if (enc_algor != OID_sm4_cbc || keylen != 16 || ivlen != 16) {
error_print();
if (enced_content) free(enced_content);
return -1;
}
sm4_set_encrypt_key(&sm4_key, key);
if (sm4_cbc_padding_encrypt(&sm4_key, iv, content, content_len,
enced_content, &enced_content_len) != 1) {
if (enced_content) free(enced_content);
memset(&sm4_key, 0, sizeof(SM4_KEY));
error_print();
return -1;
}
memset(&sm4_key, 0, sizeof(SM4_KEY));
if ((ret = cms_enced_content_info_to_der(content_type,
enc_algor, iv, ivlen, enced_content, enced_content_len,
shared_info1, shared_info1_len,
shared_info2, shared_info2_len,
out, outlen)) != 1) {
if (enced_content) free(enced_content);
if (ret < 0) error_print();
return ret;
}
free(enced_content); //FIXME: use goto end to clean enced_content
return 1;
}
// 这个函数显然是有问题的，调用方根本不知道应该准备多大的buffer
// 应该为content_len 输出给一个maxlen 的最大buffer值
int cms_enced_content_info_decrypt_from_der(
int *enc_algor, const uint8_t *key, size_t keylen,
int *content_type, uint8_t *content, size_t *content_len,
const uint8_t **shared_info1, size_t *shared_info1_len,// 支持可选null输出
const uint8_t **shared_info2, size_t *shared_info2_len,// 支持可选null输出
const uint8_t **in, size_t *inlen)
{
SM4_KEY sm4_key;
const uint8_t *iv;
size_t ivlen;
const uint8_t *enced_content;
size_t enced_content_len;
if (cms_enced_content_info_from_der(content_type,
enc_algor, &iv, &ivlen, &enced_content, &enced_content_len,
shared_info1, shared_info1_len,
shared_info2, shared_info2_len,
in, inlen) != 1
|| asn1_check(*enc_algor == OID_sm4_cbc) != 1
|| asn1_check(ivlen == SM4_BLOCK_SIZE) != 1
|| asn1_check(keylen == SM4_KEY_SIZE) != 1) {
error_print();
return -1;
}
sm4_set_decrypt_key(&sm4_key, key);
if (sm4_cbc_padding_decrypt(&sm4_key, iv, enced_content, enced_content_len,
content, content_len) != 1) {
memset(&sm4_key, 0, sizeof(SM4_KEY));
return -1;
}
memset(&sm4_key, 0, sizeof(SM4_KEY));
return 1;
}
int cms_encrypted_data_to_der(
int version,
int content_type,
int enc_algor, const uint8_t *iv, size_t ivlen,
const uint8_t *enced_content, size_t enced_content_len,
const uint8_t *shared_info1, size_t shared_info1_len,
const uint8_t *shared_info2, size_t shared_info2_len,
uint8_t **out, size_t *outlen)
{
size_t len = 0;
if (version != 1) {
error_print();
return -1;
}
if (asn1_int_to_der(version, NULL, &len) != 1
|| cms_enced_content_info_to_der(
content_type,
enc_algor, iv, ivlen,
enced_content, enced_content_len,
shared_info1, shared_info1_len,
shared_info2, shared_info2_len,
NULL, &len) != 1
|| asn1_sequence_header_to_der(len, out, outlen) != 1
|| asn1_int_to_der(version, out, outlen) != 1
|| cms_enced_content_info_to_der(
content_type,
enc_algor, iv, ivlen,
enced_content, enced_content_len,
shared_info1, shared_info1_len,
shared_info2, shared_info2_len,
NULL, &len) != 1) {
error_print();
return -1;
}
return 1;
}
int cms_encrypted_data_from_der(
int *version,
int *content_type,
int *enc_algor, const uint8_t **iv, size_t *ivlen,
const uint8_t **enced_content, size_t *enced_content_len,
const uint8_t **shared_info1, size_t *shared_info1_len,
const uint8_t **shared_info2, size_t *shared_info2_len,
const uint8_t **in, size_t *inlen)
{
int ret;
const uint8_t *d;
size_t dlen;
if ((ret = asn1_sequence_from_der(&d, &dlen, in, inlen)) != 1) {
if (ret < 0) error_print();
return ret;
}
if (asn1_int_from_der(version, &d, &dlen) != 1
|| cms_enced_content_info_from_der(
content_type,
enc_algor, iv, ivlen,
enced_content, enced_content_len,
shared_info1, shared_info1_len,
shared_info2, shared_info2_len,
&d, &dlen) != 1
|| asn1_length_is_zero(dlen) != 1) {
error_print();
return -1;
}
if (*version != 1) {
error_print();
return -1;
}
return 1;
}
int cms_encrypted_data_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *d, size_t dlen)
{
int val;
const uint8_t *p;
size_t len;
format_print(fp, fmt, ind, "%s\n", label);
ind += 4;
if (asn1_int_from_der(&val, &d, &dlen) != 1) goto err;
format_print(fp, fmt, ind, "version: %d\n", val);
if (asn1_sequence_from_der(&p, &len, &d, &dlen) != 1) goto err;
cms_enced_content_info_print(fp, fmt, ind, "encryptedContentInfo", p, len);
if (asn1_length_is_zero(dlen) != 1) goto err;
return 1;
err:
error_print();
return -1;
}
int cms_encrypted_data_encrypt_to_der(
int enc_algor, const uint8_t *key, size_t keylen, const uint8_t *iv, size_t ivlen,
int content_type, const uint8_t *content, size_t content_len,
const uint8_t *shared_info1, size_t shared_info1_len,
const uint8_t *shared_info2, size_t shared_info2_len,
uint8_t **out, size_t *outlen)
{
size_t len = 0;
if (asn1_int_to_der(CMS_version_v1, NULL, &len) != 1
|| cms_enced_content_info_encrypt_to_der(
enc_algor, key, keylen, iv, ivlen,
content_type, content, content_len,
shared_info1, shared_info1_len,
shared_info2, shared_info2_len,
NULL, &len) != 1
|| asn1_sequence_header_to_der(len, out, outlen) != 1
|| asn1_int_to_der(CMS_version_v1, out, outlen) != 1
|| cms_enced_content_info_encrypt_to_der(
enc_algor, key, keylen, iv, ivlen,
content_type, content, content_len,
shared_info1, shared_info1_len,
shared_info2, shared_info2_len,
out, outlen) != 1) {
error_print();
return -1;
}
return 1;
}
int cms_encrypted_data_decrypt_from_der(
int *enc_algor, const uint8_t *key, size_t keylen,
int *content_type, uint8_t *content, size_t *content_len,
const uint8_t **shared_info1, size_t *shared_info1_len,
const uint8_t **shared_info2, size_t *shared_info2_len,
const uint8_t **in, size_t *inlen)
{
int ret, version;
const uint8_t *d;
size_t dlen;
if ((ret = asn1_sequence_from_der(&d, &dlen, in, inlen)) != 1) {
if (ret < 0) error_print();
return ret;
}
if (asn1_int_from_der(&version, &d, &dlen) != 1
|| asn1_check(version == CMS_version_v1) != 1
|| cms_enced_content_info_decrypt_from_der(
enc_algor, key, keylen,
content_type, content, content_len,
shared_info1, shared_info1_len,
shared_info2, shared_info2_len,
&d, &dlen) != 1
|| asn1_length_is_zero(dlen) != 1) {
error_print();
return -1;
}
return 1;
}
int cms_issuer_and_serial_number_to_der(
const uint8_t *issuer, size_t issuer_len,
const uint8_t *serial_number, size_t serial_number_len,
uint8_t **out, size_t *outlen)
{
size_t len = 0;
if (asn1_sequence_to_der(issuer, issuer_len, NULL, &len) != 1
|| asn1_integer_to_der(serial_number, serial_number_len, NULL, &len) != 1
|| asn1_sequence_header_to_der(len, out, outlen) != 1
|| asn1_sequence_to_der(issuer, issuer_len, out, outlen) != 1
|| asn1_integer_to_der(serial_number, serial_number_len, out, outlen) != 1) {
error_print();
return -1;
}
return 1;
}
int cms_issuer_and_serial_number_from_der(
const uint8_t **issuer, size_t *issuer_len,
const uint8_t **serial_number, size_t *serial_number_len,
const uint8_t **in, size_t *inlen)
{
int ret;
const uint8_t *d;
size_t dlen;
if ((ret = asn1_sequence_from_der(&d, &dlen, in, inlen)) != 1) {
if (ret < 0) error_print();
return ret;
}
if (asn1_sequence_from_der(issuer, issuer_len, &d, &dlen) != 1
|| asn1_integer_from_der(serial_number, serial_number_len, &d, &dlen) != 1
|| asn1_length_is_zero(dlen) != 1) {
error_print();
return -1;
}
return 1;
}
int cms_issuer_and_serial_number_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *d, size_t dlen)
{
const uint8_t *p;
size_t len;
format_print(fp, fmt, ind, "%s\n", label);
ind += 4;
if (asn1_sequence_from_der(&p, &len, &d, &dlen) != 1) goto err;
x509_name_print(fp, fmt, ind, "issuer", p, len);
if (asn1_integer_from_der(&p, &len, &d, &dlen) != 1) goto err;
format_bytes(fp, fmt, ind, "serialNumber", p, len);
if (asn1_length_is_zero(dlen) != 1) goto err;
return 1;
err:
error_print();
return -1;
}
int cms_signer_info_to_der(
int version,
const uint8_t *issuer, size_t issuer_len,
const uint8_t *serial_number, size_t serial_number_len,
int digest_algor,
const uint8_t *authed_attrs, size_t authed_attrs_len,
int signature_algor,
const uint8_t *enced_digest, size_t enced_digest_len,
const uint8_t *unauthed_attrs, size_t unauthed_attrs_len,
uint8_t **out, size_t *outlen)
{
size_t len = 0;
if (version != 1) {
error_print();
return -1;
}
if (asn1_int_to_der(version, NULL, &len) != 1
|| cms_issuer_and_serial_number_to_der(
issuer, issuer_len,
serial_number, serial_number_len, NULL, &len) != 1
|| x509_digest_algor_to_der(digest_algor, NULL, &len) != 1
|| asn1_implicit_set_to_der(0, authed_attrs, authed_attrs_len, NULL, &len) < 0
|| x509_signature_algor_to_der(signature_algor, NULL, &len) != 1
|| asn1_octet_string_to_der(enced_digest, enced_digest_len, NULL, &len) != 1
|| asn1_implicit_set_to_der(1, unauthed_attrs, unauthed_attrs_len, NULL, &len) < 0
|| asn1_sequence_header_to_der(len, out, outlen) != 1
|| asn1_int_to_der(version, out, outlen) != 1
|| cms_issuer_and_serial_number_to_der(
issuer, issuer_len,
serial_number, serial_number_len, out, outlen) != 1
|| x509_digest_algor_to_der(digest_algor, out, outlen) != 1
|| asn1_implicit_set_to_der(0, authed_attrs, authed_attrs_len, out, outlen) < 0
|| x509_signature_algor_to_der(signature_algor, out, outlen) != 1
|| asn1_octet_string_to_der(enced_digest, enced_digest_len, out, outlen) != 1
|| asn1_implicit_set_to_der(1, unauthed_attrs, unauthed_attrs_len, out, outlen) < 0) {
error_print();
return -1;
}
return 1;
}
int cms_signer_info_from_der(
int *version,
const uint8_t **issuer, size_t *issuer_len,
const uint8_t **serial_number, size_t *serial_number_len,
int *digest_algor,
const uint8_t **authed_attrs, size_t *authed_attrs_len,
int *signature_algor,
const uint8_t **enced_digest, size_t *enced_digest_len,
const uint8_t **unauthed_attrs, size_t *unauthed_attrs_len,
const uint8_t **in, size_t *inlen)
{
int ret;
const uint8_t *d;
size_t dlen;
if ((ret = asn1_sequence_from_der(&d, &dlen, in, inlen)) != 1) {
if (ret < 0) error_print();
return ret;
}
if (asn1_int_from_der(version, &d, &dlen) != 1
|| cms_issuer_and_serial_number_from_der(issuer, issuer_len,
serial_number, serial_number_len, &d, &dlen) != 1
|| x509_digest_algor_from_der(digest_algor, &d, &dlen) != 1
|| asn1_implicit_set_from_der(0, authed_attrs, authed_attrs_len, &d, &dlen) < 0
|| x509_signature_algor_from_der(signature_algor, &d, &dlen) != 1
|| asn1_octet_string_from_der(enced_digest, enced_digest_len, &d, &dlen) != 1
|| asn1_implicit_set_from_der(1, unauthed_attrs, unauthed_attrs_len, &d, &dlen) < 0
|| asn1_length_is_zero(dlen) != 1) {
error_print();
return -1;
}
return 1;
}
int cms_signer_info_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *d, size_t dlen)
{
int ret, val;
const uint8_t *p;
size_t len;
format_print(fp, fmt, ind, "%s\n", label);
ind += 4;
if (asn1_int_from_der(&val, &d, &dlen) != 1) goto err;
format_print(fp, fmt, ind, "version: %d\n", val);
if (asn1_sequence_from_der(&p, &len, &d, &dlen) != 1) goto err;
cms_issuer_and_serial_number_print(fp, fmt, ind, "issuerAndSerialNumber", p, len);
if (x509_digest_algor_from_der(&val, &d, &dlen) != 1) goto err;
format_print(fp, fmt, ind, "digestAlgorithm: %s\n", x509_digest_algor_name(val));
if ((ret = asn1_implicit_set_from_der(0, &p, &len, &d, &dlen)) < 0) goto err;
if (ret) x509_attributes_print(fp, fmt, ind, "authenticatedAttributes", p, len);
if (asn1_sequence_from_der(&p, &len, &d, &dlen) != 1) goto err;
x509_signature_algor_print(fp, fmt, ind, "digestEncryptionAlgorithm", p, len);
if (asn1_octet_string_from_der(&p, &len, &d, &dlen) != 1) goto err;
format_bytes(fp, fmt, ind, "encryptedDigest", p, len);
if ((ret = asn1_implicit_set_from_der(1, &p, &len, &d, &dlen)) < 0) goto err;
if (ret) x509_attributes_print(fp, fmt, ind, "unauthenticatedAttributes", p, len);
if (asn1_length_is_zero(dlen) != 1) goto err;
return 1;
err:
error_print();
return -1;
}
int cms_signer_info_sign_to_der(
const SM3_CTX *sm3_ctx, const SM2_KEY *sign_key,
const uint8_t *issuer, size_t issuer_len,
const uint8_t *serial_number, size_t serial_number_len,
const uint8_t *authed_attrs, size_t authed_attrs_len,
const uint8_t *unauthed_attrs, size_t unauthed_attrs_len,
uint8_t **out, size_t *outlen)
{
SM3_CTX ctx = *sm3_ctx;
int fixed_outlen = 1;
uint8_t dgst[SM3_DIGEST_SIZE];
uint8_t sig[SM2_MAX_SIGNATURE_SIZE];
size_t siglen = SM2_signature_typical_size;
sm3_update(&ctx, authed_attrs, authed_attrs_len);
sm3_finish(&ctx, dgst);
if (sm2_sign_fixlen(sign_key, dgst, siglen, sig) != 1) {
error_print();
return -1;
}
if (cms_signer_info_to_der(CMS_version_v1,
issuer, issuer_len, serial_number, serial_number_len,
OID_sm3, authed_attrs, authed_attrs_len,
OID_sm2sign_with_sm3, sig, siglen,
unauthed_attrs, unauthed_attrs_len, out, outlen) != 1) {
error_print();
return -1;
}
return 1;
}
int cms_signer_info_verify_from_der(
const SM3_CTX *ctx, const uint8_t *certs, size_t certslen,
const uint8_t **cert, size_t *certlen,
const uint8_t **issuer, size_t *issuer_len,
const uint8_t **serial, size_t *serial_len,
const uint8_t **authed_attrs, size_t *authed_attrs_len,
const uint8_t **unauthed_attrs, size_t *unauthed_attrs_len,
const uint8_t **in, size_t *inlen)
{
int version;
int digest_algor;
int signature_algor;
const uint8_t *sig;
size_t siglen;
SM2_KEY public_key;
SM3_CTX sm3_ctx = *ctx;
uint8_t dgst[32];
if (cms_signer_info_from_der(&version,
issuer, issuer_len,
serial, serial_len,
&digest_algor, authed_attrs, authed_attrs_len,
&signature_algor, &sig, &siglen,
unauthed_attrs, unauthed_attrs_len,
in, inlen) != 1
|| asn1_check(version == CMS_version_v1) != 1
|| asn1_check(digest_algor == OID_sm3) != 1
|| asn1_check(signature_algor == OID_sm2sign_with_sm3) != 1) {
error_print();
return -1;
}
if (x509_certs_get_cert_by_issuer_and_serial_number(certs, certslen,
*issuer, *issuer_len, *serial, *serial_len, cert, certlen) != 1
|| x509_cert_get_subject_public_key(*cert, *certlen, &public_key) != 1) {
error_print();
return -1;
}
sm3_update(&sm3_ctx, *authed_attrs, *authed_attrs_len);
sm3_finish(&sm3_ctx, dgst);
if (sm2_verify(&public_key, dgst, sig, siglen) != 1) {
error_print();
return -1;
}
return 1;
}
int cms_signer_infos_add_signer_info(
uint8_t *d, size_t *dlen, size_t maxlen,
const SM3_CTX *sm3_ctx, const SM2_KEY *sign_key,
const uint8_t *issuer, size_t issuer_len,
const uint8_t *serial_number, size_t serial_number_len,
const uint8_t *authed_attrs, size_t authed_attrs_len,
const uint8_t *unauthed_attrs, size_t unauthed_attrs_len)
{
size_t len = *dlen;
d += *dlen;
if (cms_signer_info_sign_to_der(sm3_ctx, sign_key,
issuer, issuer_len, serial_number, serial_number_len,
authed_attrs, authed_attrs_len,
unauthed_attrs, unauthed_attrs_len,
NULL, &len) != 1
|| asn1_length_le(len, maxlen) != 1
|| cms_signer_info_sign_to_der(sm3_ctx, sign_key,
issuer, issuer_len, serial_number, serial_number_len,
authed_attrs, authed_attrs_len,
unauthed_attrs, unauthed_attrs_len,
&d, dlen) != 1) {
error_print();
return -1;
}
return 1;
}
int cms_signer_infos_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *d, size_t dlen)
{
const uint8_t *p;
size_t len;
format_print(fp, fmt, ind, "%s\n", label);
ind += 4;
while (dlen) {
if (asn1_sequence_from_der(&p, &len, &d, &dlen) != 1) {
error_print();
return -1;
}
cms_signer_info_print(fp, fmt, ind, "SignerInfo", p, len);
}
return 1;
}
int cms_digest_algors_to_der(const int *digest_algors, size_t digest_algors_cnt,
uint8_t **out, size_t *outlen)
{
size_t len = 0, i;
for (i = 0; i < digest_algors_cnt; i++) {
if (x509_digest_algor_to_der(digest_algors[i], NULL, &len) != 1) {
error_print();
return -1;
}
}
if (asn1_set_header_to_der(len, out, outlen) != 1) {
error_print();
return -1;
}
for (i = 0; i < digest_algors_cnt; i++) {
if (x509_digest_algor_to_der(digest_algors[i], out, outlen) != 1) {
error_print();
return -1;
}
}
return 1;
}
int cms_digest_algors_from_der(int *digest_algors, size_t *digest_algors_cnt, size_t max_digest_algors,
const uint8_t **in, size_t *inlen)
{
int ret;
const uint8_t *d;
size_t dlen;
if ((ret = asn1_set_from_der(&d, &dlen, in, inlen)) != 1) {
if (ret < 0) error_print();
return ret;
}
*digest_algors_cnt = 0;
while (dlen) {
if (*digest_algors_cnt > max_digest_algors) {
error_print();
return -1;
}
if (x509_digest_algor_from_der(digest_algors, &d, &dlen) != 1) {
error_print();
return -1;
}
digest_algors++;
(*digest_algors_cnt)++;
}
return 1;
}
int cms_digest_algors_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *d, size_t dlen)
{
int oid;
format_print(fp, fmt, ind, "%s\n", label);
ind += 4;
while (dlen) {
if (x509_digest_algor_from_der(&oid, &d, &dlen) != 1) {
error_print();
return -1;
}
format_print(fp, fmt, ind, "%s\n", x509_digest_algor_name(oid));
}
return 1;
}
int cms_signed_data_to_der(
int version,
const int *digest_algors, size_t digest_algors_cnt,
const int content_type, const uint8_t *content, const size_t content_len,
const uint8_t *certs, size_t certs_len,
const uint8_t *crls, const size_t crls_len,
const uint8_t *signer_infos, size_t signer_infos_len,
uint8_t **out, size_t *outlen)
{
size_t len = 0;
if (asn1_int_to_der(version, NULL, &len) != 1
|| cms_digest_algors_to_der(digest_algors, digest_algors_cnt, NULL, &len) != 1
|| cms_content_info_to_der(content_type, content, content_len, NULL, &len) != 1
|| asn1_implicit_set_to_der(0, certs, certs_len, NULL, &len) < 0
|| asn1_implicit_set_to_der(1, crls, crls_len, NULL, &len) < 0
|| cms_signer_infos_to_der(signer_infos, signer_infos_len, NULL, &len) != 1
|| asn1_sequence_header_to_der(len, out, outlen) != 1
|| asn1_int_to_der(version, out, outlen) != 1
|| cms_digest_algors_to_der(digest_algors, digest_algors_cnt, out, outlen) != 1
|| cms_content_info_to_der(content_type, content, content_len, out, outlen) != 1
|| asn1_implicit_set_to_der(0, certs, certs_len, out, outlen) < 0
|| asn1_implicit_set_to_der(1, crls, crls_len, out, outlen) < 0
|| cms_signer_infos_to_der(signer_infos, signer_infos_len, out, outlen) != 1) {
error_print();
return -1;
}
return 1;
}
int cms_signed_data_from_der(
int *version,
int *digest_algors, size_t *digest_algors_cnt, size_t max_digest_algors,
int *content_type, const uint8_t **content, size_t *content_len,
const uint8_t **certs, size_t *certs_len,
const uint8_t **crls, size_t *crls_len,
const uint8_t **signer_infos, size_t *signer_infos_len,
const uint8_t **in, size_t *inlen)
{
int ret;
const uint8_t *d;
size_t dlen;
if ((ret = asn1_sequence_from_der(&d, &dlen, in, inlen)) != 1) {
if (ret < 0) error_print();
return ret;
}
if (asn1_int_from_der(version, &d, &dlen) != 1
|| cms_digest_algors_from_der(digest_algors, digest_algors_cnt, max_digest_algors, &d, &dlen) != 1
|| cms_content_info_from_der(content_type, content, content_len, &d, &dlen) != 1
|| asn1_implicit_set_from_der(0, certs, certs_len, &d, &dlen) < 0
|| asn1_implicit_set_from_der(1, crls, crls_len, &d, &dlen) < 0
|| asn1_set_from_der(signer_infos, signer_infos_len, &d, &dlen) != 1
|| asn1_length_is_zero(dlen) != 1) {
error_print();
return -1;
}
if (*version != CMS_version_v1) {
error_print();
return -1;
}
return 1;
}
int cms_signed_data_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *d, size_t dlen)
{
int ret, val;
const uint8_t *p;