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-rw-r--r--crypto/cms/cms_enc.c382
1 files changed, 174 insertions, 208 deletions
diff --git a/crypto/cms/cms_enc.c b/crypto/cms/cms_enc.c
index bebeaf29c7ba..85ae928a496f 100644
--- a/crypto/cms/cms_enc.c
+++ b/crypto/cms/cms_enc.c
@@ -1,5 +1,6 @@
/* crypto/cms/cms_enc.c */
-/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project.
*/
/* ====================================================================
@@ -10,7 +11,7 @@
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
@@ -67,228 +68,193 @@ DECLARE_ASN1_ITEM(CMS_EncryptedData)
/* Return BIO based on EncryptedContentInfo and key */
BIO *cms_EncryptedContent_init_bio(CMS_EncryptedContentInfo *ec)
- {
- BIO *b;
- EVP_CIPHER_CTX *ctx;
- const EVP_CIPHER *ciph;
- X509_ALGOR *calg = ec->contentEncryptionAlgorithm;
- unsigned char iv[EVP_MAX_IV_LENGTH], *piv = NULL;
- unsigned char *tkey = NULL;
- size_t tkeylen = 0;
+{
+ BIO *b;
+ EVP_CIPHER_CTX *ctx;
+ const EVP_CIPHER *ciph;
+ X509_ALGOR *calg = ec->contentEncryptionAlgorithm;
+ unsigned char iv[EVP_MAX_IV_LENGTH], *piv = NULL;
+ unsigned char *tkey = NULL;
+ size_t tkeylen = 0;
- int ok = 0;
+ int ok = 0;
- int enc, keep_key = 0;
+ int enc, keep_key = 0;
- enc = ec->cipher ? 1 : 0;
+ enc = ec->cipher ? 1 : 0;
- b = BIO_new(BIO_f_cipher());
- if (!b)
- {
- CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
- ERR_R_MALLOC_FAILURE);
- return NULL;
- }
+ b = BIO_new(BIO_f_cipher());
+ if (!b) {
+ CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
- BIO_get_cipher_ctx(b, &ctx);
+ BIO_get_cipher_ctx(b, &ctx);
- if (enc)
- {
- ciph = ec->cipher;
- /* If not keeping key set cipher to NULL so subsequent calls
- * decrypt.
- */
- if (ec->key)
- ec->cipher = NULL;
- }
- else
- {
- ciph = EVP_get_cipherbyobj(calg->algorithm);
+ if (enc) {
+ ciph = ec->cipher;
+ /*
+ * If not keeping key set cipher to NULL so subsequent calls decrypt.
+ */
+ if (ec->key)
+ ec->cipher = NULL;
+ } else {
+ ciph = EVP_get_cipherbyobj(calg->algorithm);
- if (!ciph)
- {
- CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
- CMS_R_UNKNOWN_CIPHER);
- goto err;
- }
- }
+ if (!ciph) {
+ CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO, CMS_R_UNKNOWN_CIPHER);
+ goto err;
+ }
+ }
- if (EVP_CipherInit_ex(ctx, ciph, NULL, NULL, NULL, enc) <= 0)
- {
- CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
- CMS_R_CIPHER_INITIALISATION_ERROR);
- goto err;
- }
+ if (EVP_CipherInit_ex(ctx, ciph, NULL, NULL, NULL, enc) <= 0) {
+ CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
+ CMS_R_CIPHER_INITIALISATION_ERROR);
+ goto err;
+ }
- if (enc)
- {
- int ivlen;
- calg->algorithm = OBJ_nid2obj(EVP_CIPHER_CTX_type(ctx));
- /* Generate a random IV if we need one */
- ivlen = EVP_CIPHER_CTX_iv_length(ctx);
- if (ivlen > 0)
- {
- if (RAND_pseudo_bytes(iv, ivlen) <= 0)
- goto err;
- piv = iv;
- }
- }
- else if (EVP_CIPHER_asn1_to_param(ctx, calg->parameter) <= 0)
- {
- CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
- CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
- goto err;
- }
- tkeylen = EVP_CIPHER_CTX_key_length(ctx);
- /* Generate random session key */
- if (!enc || !ec->key)
- {
- tkey = OPENSSL_malloc(tkeylen);
- if (!tkey)
- {
- CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
- ERR_R_MALLOC_FAILURE);
- goto err;
- }
- if (EVP_CIPHER_CTX_rand_key(ctx, tkey) <= 0)
- goto err;
- }
+ if (enc) {
+ int ivlen;
+ calg->algorithm = OBJ_nid2obj(EVP_CIPHER_CTX_type(ctx));
+ /* Generate a random IV if we need one */
+ ivlen = EVP_CIPHER_CTX_iv_length(ctx);
+ if (ivlen > 0) {
+ if (RAND_pseudo_bytes(iv, ivlen) <= 0)
+ goto err;
+ piv = iv;
+ }
+ } else if (EVP_CIPHER_asn1_to_param(ctx, calg->parameter) <= 0) {
+ CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
+ CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
+ goto err;
+ }
+ tkeylen = EVP_CIPHER_CTX_key_length(ctx);
+ /* Generate random session key */
+ if (!enc || !ec->key) {
+ tkey = OPENSSL_malloc(tkeylen);
+ if (!tkey) {
+ CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO, ERR_R_MALLOC_FAILURE);
+ 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->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)
- {
- CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
- CMS_R_INVALID_KEY_LENGTH);
- goto err;
- }
- else
- {
- /* Use random key */
- OPENSSL_cleanse(ec->key, ec->keylen);
- OPENSSL_free(ec->key);
- ec->key = tkey;
- ec->keylen = tkeylen;
- tkey = NULL;
- ERR_clear_error();
- }
- }
- }
+ }
- if (EVP_CipherInit_ex(ctx, NULL, NULL, ec->key, piv, enc) <= 0)
- {
- CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
- CMS_R_CIPHER_INITIALISATION_ERROR);
- goto err;
- }
+ 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) {
+ CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
+ CMS_R_INVALID_KEY_LENGTH);
+ goto err;
+ } else {
+ /* Use random key */
+ OPENSSL_cleanse(ec->key, ec->keylen);
+ OPENSSL_free(ec->key);
+ ec->key = tkey;
+ ec->keylen = tkeylen;
+ tkey = NULL;
+ ERR_clear_error();
+ }
+ }
+ }
- if (piv)
- {
- calg->parameter = ASN1_TYPE_new();
- if (!calg->parameter)
- {
- CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
- ERR_R_MALLOC_FAILURE);
- goto err;
- }
- if (EVP_CIPHER_param_to_asn1(ctx, calg->parameter) <= 0)
- {
- CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
- CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
- goto err;
- }
- }
- ok = 1;
+ if (EVP_CipherInit_ex(ctx, NULL, NULL, ec->key, piv, enc) <= 0) {
+ CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
+ CMS_R_CIPHER_INITIALISATION_ERROR);
+ goto err;
+ }
- err:
- if (ec->key && !keep_key)
- {
- OPENSSL_cleanse(ec->key, ec->keylen);
- OPENSSL_free(ec->key);
- ec->key = NULL;
- }
- if (tkey)
- {
- OPENSSL_cleanse(tkey, tkeylen);
- OPENSSL_free(tkey);
- }
- if (ok)
- return b;
- BIO_free(b);
- return NULL;
- }
+ if (piv) {
+ calg->parameter = ASN1_TYPE_new();
+ if (!calg->parameter) {
+ CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ if (EVP_CIPHER_param_to_asn1(ctx, calg->parameter) <= 0) {
+ CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
+ CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
+ goto err;
+ }
+ }
+ ok = 1;
-int cms_EncryptedContent_init(CMS_EncryptedContentInfo *ec,
- const EVP_CIPHER *cipher,
- const unsigned char *key, size_t keylen)
- {
- ec->cipher = cipher;
- if (key)
- {
- ec->key = OPENSSL_malloc(keylen);
- if (!ec->key)
- return 0;
- memcpy(ec->key, key, keylen);
- }
- ec->keylen = keylen;
- if (cipher)
- ec->contentType = OBJ_nid2obj(NID_pkcs7_data);
- return 1;
- }
+ err:
+ if (ec->key && !keep_key) {
+ OPENSSL_cleanse(ec->key, ec->keylen);
+ OPENSSL_free(ec->key);
+ ec->key = NULL;
+ }
+ if (tkey) {
+ OPENSSL_cleanse(tkey, tkeylen);
+ OPENSSL_free(tkey);
+ }
+ if (ok)
+ return b;
+ BIO_free(b);
+ return NULL;
+}
+
+int cms_EncryptedContent_init(CMS_EncryptedContentInfo *ec,
+ const EVP_CIPHER *cipher,
+ const unsigned char *key, size_t keylen)
+{
+ ec->cipher = cipher;
+ if (key) {
+ ec->key = OPENSSL_malloc(keylen);
+ if (!ec->key)
+ return 0;
+ memcpy(ec->key, key, keylen);
+ }
+ ec->keylen = keylen;
+ if (cipher)
+ 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)
- {
- CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY, CMS_R_NO_KEY);
- return 0;
- }
- if (ciph)
- {
- cms->d.encryptedData = M_ASN1_new_of(CMS_EncryptedData);
- if (!cms->d.encryptedData)
- {
- CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY,
- ERR_R_MALLOC_FAILURE);
- return 0;
- }
- cms->contentType = OBJ_nid2obj(NID_pkcs7_encrypted);
- cms->d.encryptedData->version = 0;
- }
- else if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_encrypted)
- {
- CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY,
- CMS_R_NOT_ENCRYPTED_DATA);
- return 0;
- }
- ec = cms->d.encryptedData->encryptedContentInfo;
- return cms_EncryptedContent_init(ec, ciph, key, keylen);
- }
+ const unsigned char *key, size_t keylen)
+{
+ CMS_EncryptedContentInfo *ec;
+ if (!key || !keylen) {
+ CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY, CMS_R_NO_KEY);
+ return 0;
+ }
+ if (ciph) {
+ cms->d.encryptedData = M_ASN1_new_of(CMS_EncryptedData);
+ if (!cms->d.encryptedData) {
+ CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ cms->contentType = OBJ_nid2obj(NID_pkcs7_encrypted);
+ cms->d.encryptedData->version = 0;
+ } else if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_encrypted) {
+ CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY, CMS_R_NOT_ENCRYPTED_DATA);
+ return 0;
+ }
+ ec = cms->d.encryptedData->encryptedContentInfo;
+ return cms_EncryptedContent_init(ec, ciph, key, keylen);
+}
BIO *cms_EncryptedData_init_bio(CMS_ContentInfo *cms)
- {
- CMS_EncryptedData *enc = cms->d.encryptedData;
- if (enc->encryptedContentInfo->cipher && enc->unprotectedAttrs)
- enc->version = 2;
- return cms_EncryptedContent_init_bio(enc->encryptedContentInfo);
- }
+{
+ CMS_EncryptedData *enc = cms->d.encryptedData;
+ if (enc->encryptedContentInfo->cipher && enc->unprotectedAttrs)
+ enc->version = 2;
+ return cms_EncryptedContent_init_bio(enc->encryptedContentInfo);
+}