1 files changed, 125 insertions, 0 deletions
diff --git a/cryptography/hazmat/bindings/openssl/evp.py b/cryptography/hazmat/bindings/openssl/evp.py
new file mode 100644
index 00000000..c426e52e
--- /dev/null
+++ b/cryptography/hazmat/bindings/openssl/evp.py
@@ -0,0 +1,125 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+INCLUDES = """
+#include <openssl/evp.h>
+"""
+
+TYPES = """
+typedef ... EVP_CIPHER;
+typedef struct {
+    const EVP_CIPHER *cipher;
+    ENGINE *engine;
+    int encrypt;
+    ...;
+} EVP_CIPHER_CTX;
+typedef ... EVP_MD;
+typedef struct env_md_ctx_st {
+    ...;
+} EVP_MD_CTX;
+
+typedef struct evp_pkey_st {
+    int type;
+    ...;
+} EVP_PKEY;
+static const int EVP_PKEY_RSA;
+static const int EVP_PKEY_DSA;
+static const int EVP_MAX_MD_SIZE;
+static const int EVP_CTRL_GCM_SET_IVLEN;
+static const int EVP_CTRL_GCM_GET_TAG;
+static const int EVP_CTRL_GCM_SET_TAG;
+
+static const int Cryptography_HAS_GCM;
+"""
+
+FUNCTIONS = """
+const EVP_CIPHER *EVP_get_cipherbyname(const char *);
+int EVP_EncryptInit_ex(EVP_CIPHER_CTX *, const EVP_CIPHER *, ENGINE *,
+                       const unsigned char *, const unsigned char *);
+int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *, int);
+int EVP_EncryptUpdate(EVP_CIPHER_CTX *, unsigned char *, int *,
+                      const unsigned char *, int);
+int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *, unsigned char *, int *);
+int EVP_DecryptInit_ex(EVP_CIPHER_CTX *, const EVP_CIPHER *, ENGINE *,
+                       const unsigned char *, const unsigned char *);
+int EVP_DecryptUpdate(EVP_CIPHER_CTX *, unsigned char *, int *,
+                      const unsigned char *, int);
+int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *, unsigned char *, int *);
+int EVP_CipherInit_ex(EVP_CIPHER_CTX *, const EVP_CIPHER *, ENGINE *,
+                      const unsigned char *, const unsigned char *, int);
+int EVP_CipherUpdate(EVP_CIPHER_CTX *, unsigned char *, int *,
+                     const unsigned char *, int);
+int EVP_CipherFinal_ex(EVP_CIPHER_CTX *, unsigned char *, int *);
+int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *);
+const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *);
+int EVP_CIPHER_block_size(const EVP_CIPHER *);
+void EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *);
+EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void);
+void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *);
+int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *, int);
+
+EVP_MD_CTX *EVP_MD_CTX_create(void);
+int EVP_MD_CTX_copy_ex(EVP_MD_CTX *, const EVP_MD_CTX *);
+int EVP_DigestInit_ex(EVP_MD_CTX *, const EVP_MD *, ENGINE *);
+int EVP_DigestUpdate(EVP_MD_CTX *, const void *, size_t);
+int EVP_DigestFinal_ex(EVP_MD_CTX *, unsigned char *, unsigned int *);
+int EVP_MD_CTX_cleanup(EVP_MD_CTX *);
+void EVP_MD_CTX_destroy(EVP_MD_CTX *);
+const EVP_MD *EVP_get_digestbyname(const char *);
+const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *);
+int EVP_MD_size(const EVP_MD *);
+
+EVP_PKEY *EVP_PKEY_new(void);
+void EVP_PKEY_free(EVP_PKEY *);
+int EVP_PKEY_type(int);
+int EVP_PKEY_bits(EVP_PKEY *);
+RSA *EVP_PKEY_get1_RSA(EVP_PKEY *);
+
+int EVP_SignInit(EVP_MD_CTX *, const EVP_MD *);
+int EVP_SignUpdate(EVP_MD_CTX *, const void *, size_t);
+int EVP_SignFinal(EVP_MD_CTX *, unsigned char *, unsigned int *, EVP_PKEY *);
+
+int EVP_VerifyInit(EVP_MD_CTX *, const EVP_MD *);
+int EVP_VerifyUpdate(EVP_MD_CTX *, const void *, size_t);
+int EVP_VerifyFinal(EVP_MD_CTX *, const unsigned char *, unsigned int,
+                    EVP_PKEY *);
+
+const EVP_MD *EVP_md5(void);
+"""
+
+MACROS = """
+void OpenSSL_add_all_algorithms(void);
+int EVP_PKEY_assign_RSA(EVP_PKEY *, RSA *);
+int EVP_PKEY_assign_DSA(EVP_PKEY *, DSA *);
+int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *);
+int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *, int, int, void *);
+"""
+
+CUSTOMIZATIONS = """
+#ifdef EVP_CTRL_GCM_SET_TAG
+const long Cryptography_HAS_GCM = 1;
+#else
+const long Cryptography_HAS_GCM = 0;
+const long EVP_CTRL_GCM_GET_TAG = -1;
+const long EVP_CTRL_GCM_SET_TAG = -1;
+const long EVP_CTRL_GCM_SET_IVLEN = -1;
+#endif
+"""
+
+CONDITIONAL_NAMES = {
+    "Cryptography_HAS_GCM": [
+        "EVP_CTRL_GCM_GET_TAG",
+        "EVP_CTRL_GCM_SET_TAG",
+        "EVP_CTRL_GCM_SET_IVLEN",
+    ]
+}