minor function to build with Ruby's cipher module

crypto/CMakeLists.txt

@@ -524,6 +524,7 @@ add_library(
  decrepit/cfb/cfb.c
  decrepit/dh/dh_decrepit.c
  decrepit/evp/evp_do_all.c
+ decrepit/obj/obj_decrepit.c
  decrepit/ripemd/ripemd.c
  decrepit/rsa/rsa_decrepit.c
  decrepit/x509/x509_decrepit.c

crypto/cipher_extra/derive_key.c

@@ -60,10 +60,9 @@
 
 #include <openssl/digest.h>
 #include <openssl/mem.h>
+#include <openssl/evp.h>
 
 
-#define PKCS5_SALT_LEN 8
-
 int EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md,
  const uint8_t *salt, const uint8_t *data, size_t data_len,
  unsigned count, uint8_t *key, uint8_t *iv) {

crypto/decrepit/obj/obj_decrepit.c

@@ -0,0 +1,70 @@
+/* Copyright (c) 2016, Google Inc. 
+ * 
+ * Permission to use, copy, modify, and/or distribute this software for any 
+ * purpose with or without fee is hereby granted, provided that the above 
+ * copyright notice and this permission notice appear in all copies. 
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ 
+
+#include <openssl/obj.h>
+
+#include <assert.h>
+#include <string.h>
+
+#include <openssl/evp.h>
+
+#include "../../internal.h"
+
+
+struct wrapped_callback {
+ void (*callback)(const OBJ_NAME *, void *arg);
+ void *arg;
+};
+
+static void cipher_callback(const EVP_CIPHER *cipher, const char *name,
+ const char *unused, void *arg) {
+ const struct wrapped_callback *wrapped = (struct wrapped_callback *)arg;
+ OBJ_NAME obj_name;
+
+ OPENSSL_memset(&obj_name, 0, sizeof(obj_name));
+ obj_name.type = OBJ_NAME_TYPE_CIPHER_METH;
+ obj_name.name = name;
+ obj_name.data = (const char *)cipher;
+
+ wrapped->callback(&obj_name, wrapped->arg);
+}
+
+static void md_callback(const EVP_MD *md, const char *name, const char *unused,
+ void *arg) {
+ const struct wrapped_callback *wrapped = (struct wrapped_callback*) arg;
+ OBJ_NAME obj_name;
+
+ OPENSSL_memset(&obj_name, 0, sizeof(obj_name));
+ obj_name.type = OBJ_NAME_TYPE_MD_METH;
+ obj_name.name = name;
+ obj_name.data = (const char *)md;
+
+ wrapped->callback(&obj_name, wrapped->arg);
+} 
+
+void OBJ_NAME_do_all_sorted(int type,
+ void (*callback)(const OBJ_NAME *, void *arg),
+ void *arg) {
+ struct wrapped_callback wrapped;
+ wrapped.callback = callback;
+ wrapped.arg = arg;
+
+ if (type == OBJ_NAME_TYPE_CIPHER_METH) {
+ EVP_CIPHER_do_all_sorted(cipher_callback, &wrapped);
+ } else if (type == OBJ_NAME_TYPE_MD_METH) {
+ EVP_MD_do_all_sorted(md_callback, &wrapped);
+ } else {
+ assert(0);
+ }
+}

crypto/fipsmodule/bn/bn.c

@@ -441,3 +441,7 @@ void bn_set_minimal_width(BIGNUM *bn) {
  bn->neg = 0;
  }
 }
+
+int BN_get_flags(const BIGNUM *bn, int flags) {
+ return bn->flags & flags;
+}

crypto/fipsmodule/cipher/cipher.c

@@ -63,6 +63,7 @@
 #include <openssl/err.h>
 #include <openssl/mem.h>
 #include <openssl/nid.h>
+#include <openssl/obj.h>
 
 #include "internal.h"
 #include "../../internal.h"
@@ -703,6 +704,13 @@ uint32_t EVP_CIPHER_mode(const EVP_CIPHER *cipher) {
  return cipher->flags & EVP_CIPH_MODE_MASK;
 }
 
+const char *EVP_CIPHER_name(const EVP_CIPHER *cipher) {
+ if (cipher != NULL) {
+ return OBJ_nid2sn(cipher->nid);
+ }
+ return NULL;
+}
+
 int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
  const uint8_t *key, const uint8_t *iv, int enc) {
  if (cipher) {

crypto/pkcs8/internal.h

@@ -112,8 +112,6 @@ struct pbe_suite {
  const char *pass, size_t pass_len, CBS *param);
 };
 
-#define PKCS5_SALT_LEN 8
-
 int PKCS5_pbe2_decrypt_init(const struct pbe_suite *suite, EVP_CIPHER_CTX *ctx,
  const char *pass, size_t pass_len, CBS *param);
 

include/openssl/bn.h

@@ -336,6 +336,11 @@ OPENSSL_EXPORT BN_ULONG BN_get_word(const BIGNUM *bn);
 // returns zero.
 OPENSSL_EXPORT int BN_get_u64(const BIGNUM *bn, uint64_t *out);
 
+// BN_get_flags interprets |flags| as a bitmask and returns the flags for |bn|.
+// The returned value is a set of bitmask of |BN_FLG_*| values, ORed together,
+// or 0 if none of the given flags are set.
+OPENSSL_EXPORT int BN_get_flags(const BIGNUM *bn, int flags);
+
 
 // ASN.1 functions.
 

include/openssl/cipher.h

@@ -309,6 +309,9 @@ OPENSSL_EXPORT int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *ctx,
 // |NID_aes_128_gcm|.)
 OPENSSL_EXPORT int EVP_CIPHER_nid(const EVP_CIPHER *cipher);
 
+// EVP_CIPHER_name returns the short name of |cipher|.
+OPENSSL_EXPORT const char *EVP_CIPHER_name(const EVP_CIPHER *cipher);
+
 // EVP_CIPHER_block_size returns the block size, in bytes, for |cipher|, or one
 // if |cipher| is a stream cipher.
 OPENSSL_EXPORT unsigned EVP_CIPHER_block_size(const EVP_CIPHER *cipher);

include/openssl/evp.h

@@ -489,6 +489,8 @@ OPENSSL_EXPORT int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
 // function that results in a key suitable for use in symmetric
 // cryptography.
 
+#define PKCS5_SALT_LEN 8
+
 // PKCS5_PBKDF2_HMAC computes |iterations| iterations of PBKDF2 of |password|
 // and |salt|, using |digest|, and outputs |key_len| bytes to |out_key|. It
 // returns one on success and zero on allocation failure or if |iterations| is

include/openssl/obj.h

@@ -238,6 +238,17 @@ typedef struct obj_name_st {
 #define OBJ_NAME_TYPE_MD_METH 1
 #define OBJ_NAME_TYPE_CIPHER_METH 2
 
+// OBJ_NAME_do_all_sorted calls |callback| zero or more times, each time with
+// the name of a different primitive. If |type| is |OBJ_NAME_TYPE_MD_METH| then
+// the primitives will be hash functions, alternatively if |type| is
+// |OBJ_NAME_TYPE_CIPHER_METH| then the primitives will be ciphers or cipher
+// modes.
+//
+// This function is ill-specified and should never be used.
+OPENSSL_EXPORT void OBJ_NAME_do_all_sorted(
+ int type, void (*callback)(const OBJ_NAME *, void *arg), void *arg);
+
+
 // OBJ_cleanup does nothing.
 OPENSSL_EXPORT void OBJ_cleanup(void);