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author | marha <marha@users.sourceforge.net> | 2015-02-22 21:39:56 +0100 |
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committer | marha <marha@users.sourceforge.net> | 2015-02-22 21:39:56 +0100 |
commit | 462f18c7b25fe3e467f837647d07ab0a78aa8d2b (patch) | |
tree | fc8013c0a1bac05a1945846c1697e973f4c35013 /openssl/crypto/cms/cms_enc.c | |
parent | 36f711ee12b6dd5184198abed3aa551efb585587 (diff) | |
download | vcxsrv-462f18c7b25fe3e467f837647d07ab0a78aa8d2b.tar.gz vcxsrv-462f18c7b25fe3e467f837647d07ab0a78aa8d2b.tar.bz2 vcxsrv-462f18c7b25fe3e467f837647d07ab0a78aa8d2b.zip |
Merged origin/release (checked in because wanted to merge new stuff)
Diffstat (limited to 'openssl/crypto/cms/cms_enc.c')
-rw-r--r-- | openssl/crypto/cms/cms_enc.c | 382 |
1 files changed, 174 insertions, 208 deletions
diff --git a/openssl/crypto/cms/cms_enc.c b/openssl/crypto/cms/cms_enc.c index bebeaf29c..85ae928a4 100644 --- a/openssl/crypto/cms/cms_enc.c +++ b/openssl/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); +} |