mirror of
https://github.com/openssl/openssl.git
synced 2024-12-09 05:51:54 +08:00
bf3f8f2c0e
If the cipher being used in ossl_cms_EncryptedContent_init_bio() has no associated OID then we should report an error rather than continuing on regardless. Continuing on still ends up failing - but later on and with a more cryptic error message. Reviewed-by: Hugo Landau <hlandau@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19918)
255 lines
7.8 KiB
C
255 lines
7.8 KiB
C
/*
|
|
* Copyright 2008-2021 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 "internal/cryptlib.h"
|
|
#include <openssl/asn1t.h>
|
|
#include <openssl/pem.h>
|
|
#include <openssl/x509v3.h>
|
|
#include <openssl/err.h>
|
|
#include <openssl/cms.h>
|
|
#include <openssl/rand.h>
|
|
#include "crypto/evp.h"
|
|
#include "cms_local.h"
|
|
|
|
/* CMS EncryptedData Utilities */
|
|
|
|
/* Return BIO based on EncryptedContentInfo and key */
|
|
|
|
BIO *ossl_cms_EncryptedContent_init_bio(CMS_EncryptedContentInfo *ec,
|
|
const CMS_CTX *cms_ctx)
|
|
{
|
|
BIO *b;
|
|
EVP_CIPHER_CTX *ctx;
|
|
EVP_CIPHER *fetched_ciph = NULL;
|
|
const EVP_CIPHER *cipher = NULL;
|
|
X509_ALGOR *calg = ec->contentEncryptionAlgorithm;
|
|
evp_cipher_aead_asn1_params aparams;
|
|
unsigned char iv[EVP_MAX_IV_LENGTH], *piv = NULL;
|
|
unsigned char *tkey = NULL;
|
|
int len;
|
|
int ivlen = 0;
|
|
size_t tkeylen = 0;
|
|
int ok = 0;
|
|
int enc, keep_key = 0;
|
|
OSSL_LIB_CTX *libctx = ossl_cms_ctx_get0_libctx(cms_ctx);
|
|
const char *propq = ossl_cms_ctx_get0_propq(cms_ctx);
|
|
|
|
enc = ec->cipher ? 1 : 0;
|
|
|
|
b = BIO_new(BIO_f_cipher());
|
|
if (b == NULL) {
|
|
ERR_raise(ERR_LIB_CMS, ERR_R_BIO_LIB);
|
|
return NULL;
|
|
}
|
|
|
|
BIO_get_cipher_ctx(b, &ctx);
|
|
|
|
(void)ERR_set_mark();
|
|
if (enc) {
|
|
cipher = ec->cipher;
|
|
/*
|
|
* If not keeping key set cipher to NULL so subsequent calls decrypt.
|
|
*/
|
|
if (ec->key != NULL)
|
|
ec->cipher = NULL;
|
|
} else {
|
|
cipher = EVP_get_cipherbyobj(calg->algorithm);
|
|
}
|
|
if (cipher != NULL) {
|
|
fetched_ciph = EVP_CIPHER_fetch(libctx, EVP_CIPHER_get0_name(cipher),
|
|
propq);
|
|
if (fetched_ciph != NULL)
|
|
cipher = fetched_ciph;
|
|
}
|
|
if (cipher == NULL) {
|
|
(void)ERR_clear_last_mark();
|
|
ERR_raise(ERR_LIB_CMS, CMS_R_UNKNOWN_CIPHER);
|
|
goto err;
|
|
}
|
|
(void)ERR_pop_to_mark();
|
|
|
|
if (EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc) <= 0) {
|
|
ERR_raise(ERR_LIB_CMS, CMS_R_CIPHER_INITIALISATION_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
if (enc) {
|
|
calg->algorithm = OBJ_nid2obj(EVP_CIPHER_CTX_get_type(ctx));
|
|
if (calg->algorithm == NULL) {
|
|
ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_CONTENT_ENCRYPTION_ALGORITHM);
|
|
goto err;
|
|
}
|
|
/* Generate a random IV if we need one */
|
|
ivlen = EVP_CIPHER_CTX_get_iv_length(ctx);
|
|
if (ivlen < 0) {
|
|
ERR_raise(ERR_LIB_CMS, ERR_R_EVP_LIB);
|
|
goto err;
|
|
}
|
|
|
|
if (ivlen > 0) {
|
|
if (RAND_bytes_ex(libctx, iv, ivlen, 0) <= 0)
|
|
goto err;
|
|
piv = iv;
|
|
}
|
|
} else {
|
|
if (evp_cipher_asn1_to_param_ex(ctx, calg->parameter, &aparams) <= 0) {
|
|
ERR_raise(ERR_LIB_CMS, CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
|
|
goto err;
|
|
}
|
|
if ((EVP_CIPHER_get_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
|
|
piv = aparams.iv;
|
|
if (ec->taglen > 0
|
|
&& EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG,
|
|
ec->taglen, ec->tag) <= 0) {
|
|
ERR_raise(ERR_LIB_CMS, CMS_R_CIPHER_AEAD_SET_TAG_ERROR);
|
|
goto err;
|
|
}
|
|
}
|
|
}
|
|
len = EVP_CIPHER_CTX_get_key_length(ctx);
|
|
if (len <= 0)
|
|
goto err;
|
|
tkeylen = (size_t)len;
|
|
|
|
/* Generate random session key */
|
|
if (!enc || !ec->key) {
|
|
tkey = OPENSSL_malloc(tkeylen);
|
|
if (tkey == NULL)
|
|
goto err;
|
|
if (EVP_CIPHER_CTX_rand_key(ctx, tkey) <= 0)
|
|
goto err;
|
|
}
|
|
|
|
if (!ec->key) {
|
|
ec->key = tkey;
|
|
ec->keylen = tkeylen;
|
|
tkey = NULL;
|
|
if (enc)
|
|
keep_key = 1;
|
|
else
|
|
ERR_clear_error();
|
|
|
|
}
|
|
|
|
if (ec->keylen != tkeylen) {
|
|
/* If necessary set key length */
|
|
if (EVP_CIPHER_CTX_set_key_length(ctx, ec->keylen) <= 0) {
|
|
/*
|
|
* Only reveal failure if debugging so we don't leak information
|
|
* which may be useful in MMA.
|
|
*/
|
|
if (enc || ec->debug) {
|
|
ERR_raise(ERR_LIB_CMS, CMS_R_INVALID_KEY_LENGTH);
|
|
goto err;
|
|
} else {
|
|
/* Use random key */
|
|
OPENSSL_clear_free(ec->key, ec->keylen);
|
|
ec->key = tkey;
|
|
ec->keylen = tkeylen;
|
|
tkey = NULL;
|
|
ERR_clear_error();
|
|
}
|
|
}
|
|
}
|
|
|
|
if (EVP_CipherInit_ex(ctx, NULL, NULL, ec->key, piv, enc) <= 0) {
|
|
ERR_raise(ERR_LIB_CMS, CMS_R_CIPHER_INITIALISATION_ERROR);
|
|
goto err;
|
|
}
|
|
if (enc) {
|
|
calg->parameter = ASN1_TYPE_new();
|
|
if (calg->parameter == NULL) {
|
|
ERR_raise(ERR_LIB_CMS, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
if ((EVP_CIPHER_get_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
|
|
memcpy(aparams.iv, piv, ivlen);
|
|
aparams.iv_len = ivlen;
|
|
aparams.tag_len = EVP_CIPHER_CTX_get_tag_length(ctx);
|
|
if (aparams.tag_len <= 0)
|
|
goto err;
|
|
}
|
|
|
|
if (evp_cipher_param_to_asn1_ex(ctx, calg->parameter, &aparams) <= 0) {
|
|
ERR_raise(ERR_LIB_CMS, CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
|
|
goto err;
|
|
}
|
|
/* If parameter type not set omit parameter */
|
|
if (calg->parameter->type == V_ASN1_UNDEF) {
|
|
ASN1_TYPE_free(calg->parameter);
|
|
calg->parameter = NULL;
|
|
}
|
|
}
|
|
ok = 1;
|
|
|
|
err:
|
|
EVP_CIPHER_free(fetched_ciph);
|
|
if (!keep_key || !ok) {
|
|
OPENSSL_clear_free(ec->key, ec->keylen);
|
|
ec->key = NULL;
|
|
}
|
|
OPENSSL_clear_free(tkey, tkeylen);
|
|
if (ok)
|
|
return b;
|
|
BIO_free(b);
|
|
return NULL;
|
|
}
|
|
|
|
int ossl_cms_EncryptedContent_init(CMS_EncryptedContentInfo *ec,
|
|
const EVP_CIPHER *cipher,
|
|
const unsigned char *key, size_t keylen,
|
|
const CMS_CTX *cms_ctx)
|
|
{
|
|
ec->cipher = cipher;
|
|
if (key) {
|
|
if ((ec->key = OPENSSL_malloc(keylen)) == NULL)
|
|
return 0;
|
|
memcpy(ec->key, key, keylen);
|
|
}
|
|
ec->keylen = keylen;
|
|
if (cipher != NULL)
|
|
ec->contentType = OBJ_nid2obj(NID_pkcs7_data);
|
|
return 1;
|
|
}
|
|
|
|
int CMS_EncryptedData_set1_key(CMS_ContentInfo *cms, const EVP_CIPHER *ciph,
|
|
const unsigned char *key, size_t keylen)
|
|
{
|
|
CMS_EncryptedContentInfo *ec;
|
|
|
|
if (!key || !keylen) {
|
|
ERR_raise(ERR_LIB_CMS, CMS_R_NO_KEY);
|
|
return 0;
|
|
}
|
|
if (ciph) {
|
|
cms->d.encryptedData = M_ASN1_new_of(CMS_EncryptedData);
|
|
if (!cms->d.encryptedData) {
|
|
ERR_raise(ERR_LIB_CMS, ERR_R_ASN1_LIB);
|
|
return 0;
|
|
}
|
|
cms->contentType = OBJ_nid2obj(NID_pkcs7_encrypted);
|
|
cms->d.encryptedData->version = 0;
|
|
} else if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_encrypted) {
|
|
ERR_raise(ERR_LIB_CMS, CMS_R_NOT_ENCRYPTED_DATA);
|
|
return 0;
|
|
}
|
|
ec = cms->d.encryptedData->encryptedContentInfo;
|
|
return ossl_cms_EncryptedContent_init(ec, ciph, key, keylen,
|
|
ossl_cms_get0_cmsctx(cms));
|
|
}
|
|
|
|
BIO *ossl_cms_EncryptedData_init_bio(const CMS_ContentInfo *cms)
|
|
{
|
|
CMS_EncryptedData *enc = cms->d.encryptedData;
|
|
if (enc->encryptedContentInfo->cipher && enc->unprotectedAttrs)
|
|
enc->version = 2;
|
|
return ossl_cms_EncryptedContent_init_bio(enc->encryptedContentInfo,
|
|
ossl_cms_get0_cmsctx(cms));
|
|
}
|