diff options
Diffstat (limited to 'cryptography/hazmat/bindings/openssl')
| -rw-r--r-- | cryptography/hazmat/bindings/openssl/backend.py | 89 | ||||
| -rw-r--r-- | cryptography/hazmat/bindings/openssl/bignum.py | 3 | ||||
| -rw-r--r-- | cryptography/hazmat/bindings/openssl/engine.py | 10 | ||||
| -rw-r--r-- | cryptography/hazmat/bindings/openssl/err.py | 7 | ||||
| -rw-r--r-- | cryptography/hazmat/bindings/openssl/pem.py | 9 | ||||
| -rw-r--r-- | cryptography/hazmat/bindings/openssl/rsa.py | 27 |
6 files changed, 139 insertions, 6 deletions
diff --git a/cryptography/hazmat/bindings/openssl/backend.py b/cryptography/hazmat/bindings/openssl/backend.py index 9f8ea939..f19c8cca 100644 --- a/cryptography/hazmat/bindings/openssl/backend.py +++ b/cryptography/hazmat/bindings/openssl/backend.py @@ -19,7 +19,7 @@ import sys import cffi from cryptography import utils -from cryptography.exceptions import UnsupportedAlgorithm +from cryptography.exceptions import UnsupportedAlgorithm, InvalidTag from cryptography.hazmat.bindings.interfaces import ( CipherBackend, HashBackend, HMACBackend ) @@ -28,9 +28,27 @@ from cryptography.hazmat.primitives.ciphers.algorithms import ( AES, Blowfish, Camellia, CAST5, TripleDES, ARC4, ) from cryptography.hazmat.primitives.ciphers.modes import ( - CBC, CTR, ECB, OFB, CFB + CBC, CTR, ECB, OFB, CFB, GCM, ) +_OSX_PRE_INCLUDE = """ +#ifdef __APPLE__ +#include <AvailabilityMacros.h> +#define __ORIG_DEPRECATED_IN_MAC_OS_X_VERSION_10_7_AND_LATER \ + DEPRECATED_IN_MAC_OS_X_VERSION_10_7_AND_LATER +#undef DEPRECATED_IN_MAC_OS_X_VERSION_10_7_AND_LATER +#define DEPRECATED_IN_MAC_OS_X_VERSION_10_7_AND_LATER +#endif +""" + +_OSX_POST_INCLUDE = """ +#ifdef __APPLE__ +#undef DEPRECATED_IN_MAC_OS_X_VERSION_10_7_AND_LATER +#define DEPRECATED_IN_MAC_OS_X_VERSION_10_7_AND_LATER \ + __ORIG_DEPRECATED_IN_MAC_OS_X_VERSION_10_7_AND_LATER +#endif +""" + @utils.register_interface(CipherBackend) @utils.register_interface(HashBackend) @@ -111,8 +129,15 @@ class Backend(object): # is legal, but the following will fail to compile: # int foo(int); # int foo(short); + lib = ffi.verify( - source="\n".join(includes + functions + customizations), + source="\n".join( + [_OSX_PRE_INCLUDE] + + includes + + [_OSX_POST_INCLUDE] + + functions + + customizations + ), libraries=["crypto", "ssl"], ) @@ -186,6 +211,11 @@ class Backend(object): type(None), GetCipherByName("rc4") ) + self.register_cipher_adapter( + AES, + GCM, + GetCipherByName("{cipher.name}-{cipher.key_size}-{mode.name}") + ) def create_symmetric_encryption_ctx(self, cipher, mode): return _CipherContext(self, cipher, mode, _CipherContext._ENCRYPT) @@ -193,8 +223,10 @@ class Backend(object): def create_symmetric_decryption_ctx(self, cipher, mode): return _CipherContext(self, cipher, mode, _CipherContext._DECRYPT) - def _handle_error(self): + def _handle_error(self, mode): code = self.lib.ERR_get_error() + if not code and isinstance(mode, GCM): + raise InvalidTag assert code != 0 lib = self.lib.ERR_GET_LIB(code) func = self.lib.ERR_GET_FUNC(code) @@ -231,6 +263,8 @@ class GetCipherByName(object): @utils.register_interface(interfaces.CipherContext) +@utils.register_interface(interfaces.AEADCipherContext) +@utils.register_interface(interfaces.AEADEncryptionContext) class _CipherContext(object): _ENCRYPT = 1 _DECRYPT = 0 @@ -238,6 +272,9 @@ class _CipherContext(object): def __init__(self, backend, cipher, mode, operation): self._backend = backend self._cipher = cipher + self._mode = mode + self._operation = operation + self._tag = None ctx = self._backend.lib.EVP_CIPHER_CTX_new() ctx = self._backend.ffi.gc(ctx, self._backend.lib.EVP_CIPHER_CTX_free) @@ -270,6 +307,26 @@ class _CipherContext(object): ctx, len(cipher.key) ) assert res != 0 + if isinstance(mode, GCM): + res = self._backend.lib.EVP_CIPHER_CTX_ctrl( + ctx, self._backend.lib.Cryptography_EVP_CTRL_GCM_SET_IVLEN, + len(iv_nonce), self._backend.ffi.NULL + ) + assert res != 0 + if operation == self._DECRYPT: + if not mode.tag: + raise ValueError("Authentication tag must be supplied " + "when decrypting") + res = self._backend.lib.EVP_CIPHER_CTX_ctrl( + ctx, self._backend.lib.Cryptography_EVP_CTRL_GCM_SET_TAG, + len(mode.tag), mode.tag + ) + assert res != 0 + else: + if mode.tag: + raise ValueError("Authentication tag must be None when " + "encrypting") + # pass key/iv res = self._backend.lib.EVP_CipherInit_ex(ctx, self._backend.ffi.NULL, self._backend.ffi.NULL, @@ -296,12 +353,34 @@ class _CipherContext(object): outlen = self._backend.ffi.new("int *") res = self._backend.lib.EVP_CipherFinal_ex(self._ctx, buf, outlen) if res == 0: - self._backend._handle_error() + self._backend._handle_error(self._mode) + + if (isinstance(self._mode, GCM) and + self._operation == self._ENCRYPT): + block_byte_size = self._cipher.block_size // 8 + tag_buf = self._backend.ffi.new("unsigned char[]", block_byte_size) + res = self._backend.lib.EVP_CIPHER_CTX_ctrl( + self._ctx, self._backend.lib.Cryptography_EVP_CTRL_GCM_GET_TAG, + block_byte_size, tag_buf + ) + assert res != 0 + self._tag = self._backend.ffi.buffer(tag_buf)[:] res = self._backend.lib.EVP_CIPHER_CTX_cleanup(self._ctx) assert res == 1 return self._backend.ffi.buffer(buf)[:outlen[0]] + def authenticate_additional_data(self, data): + outlen = self._backend.ffi.new("int *") + res = self._backend.lib.EVP_CipherUpdate( + self._ctx, self._backend.ffi.NULL, outlen, data, len(data) + ) + assert res != 0 + + @property + def tag(self): + return self._tag + @utils.register_interface(interfaces.HashContext) class _HashContext(object): diff --git a/cryptography/hazmat/bindings/openssl/bignum.py b/cryptography/hazmat/bindings/openssl/bignum.py index fcfadff1..1b0fe5ab 100644 --- a/cryptography/hazmat/bindings/openssl/bignum.py +++ b/cryptography/hazmat/bindings/openssl/bignum.py @@ -28,6 +28,9 @@ int BN_set_word(BIGNUM *, BN_ULONG); char *BN_bn2hex(const BIGNUM *); int BN_hex2bn(BIGNUM **, const char *); +int BN_dec2bn(BIGNUM **, const char *); + +int BN_num_bits(const BIGNUM *); """ MACROS = """ diff --git a/cryptography/hazmat/bindings/openssl/engine.py b/cryptography/hazmat/bindings/openssl/engine.py index b76befce..1f377665 100644 --- a/cryptography/hazmat/bindings/openssl/engine.py +++ b/cryptography/hazmat/bindings/openssl/engine.py @@ -36,6 +36,16 @@ void ENGINE_load_builtin_engines(); int ENGINE_ctrl_cmd_string(ENGINE *, const char *, const char *, int); int ENGINE_set_default(ENGINE *, unsigned int); int ENGINE_register_complete(ENGINE *); + +int ENGINE_set_default_RSA(ENGINE *); +int ENGINE_set_default_string(ENGINE *, const char *); +int ENGINE_set_default_DSA(ENGINE *); +int ENGINE_set_default_ECDH(ENGINE *); +int ENGINE_set_default_ECDSA(ENGINE *); +int ENGINE_set_default_DH(ENGINE *); +int ENGINE_set_default_RAND(ENGINE *); +int ENGINE_set_default_ciphers(ENGINE *); +int ENGINE_set_default_digests(ENGINE *); """ MACROS = """ diff --git a/cryptography/hazmat/bindings/openssl/err.py b/cryptography/hazmat/bindings/openssl/err.py index 3dac6948..f31c2405 100644 --- a/cryptography/hazmat/bindings/openssl/err.py +++ b/cryptography/hazmat/bindings/openssl/err.py @@ -23,11 +23,18 @@ struct ERR_string_data_st { typedef struct ERR_string_data_st ERR_STRING_DATA; static const int ERR_LIB_EVP; +static const int ERR_LIB_PEM; static const int EVP_F_EVP_ENCRYPTFINAL_EX; static const int EVP_F_EVP_DECRYPTFINAL_EX; static const int EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH; + +static const int PEM_F_PEM_READ_BIO_PRIVATEKEY; +static const int PEM_F_D2I_PKCS8PRIVATEKEY_BIO; + +static const int PEM_R_BAD_PASSWORD_READ; +static const int ASN1_R_BAD_PASSWORD_READ; """ FUNCTIONS = """ diff --git a/cryptography/hazmat/bindings/openssl/pem.py b/cryptography/hazmat/bindings/openssl/pem.py index 00f0dc36..cef7839f 100644 --- a/cryptography/hazmat/bindings/openssl/pem.py +++ b/cryptography/hazmat/bindings/openssl/pem.py @@ -29,6 +29,15 @@ int PEM_write_bio_PrivateKey(BIO *, EVP_PKEY *, const EVP_CIPHER *, EVP_PKEY *PEM_read_bio_PrivateKey(BIO *, EVP_PKEY **, pem_password_cb *, void *); +int PEM_write_bio_PKCS8PrivateKey(BIO *, EVP_PKEY *, const EVP_CIPHER *, + char *, int, pem_password_cb *, void *); + +int i2d_PKCS8PrivateKey_bio(BIO *, EVP_PKEY *, const EVP_CIPHER *, + char *, int, pem_password_cb *, void *); + +EVP_PKEY *d2i_PKCS8PrivateKey_bio(BIO *, EVP_PKEY **, pem_password_cb *, + void *); + int PEM_write_bio_X509_REQ(BIO *, X509_REQ *); X509_REQ *PEM_read_bio_X509_REQ(BIO *, X509_REQ **, pem_password_cb *, void *); diff --git a/cryptography/hazmat/bindings/openssl/rsa.py b/cryptography/hazmat/bindings/openssl/rsa.py index 21ed5d67..ad0d37b4 100644 --- a/cryptography/hazmat/bindings/openssl/rsa.py +++ b/cryptography/hazmat/bindings/openssl/rsa.py @@ -16,15 +16,40 @@ INCLUDES = """ """ TYPES = """ -typedef ... RSA; +typedef struct rsa_st { + BIGNUM *n; + BIGNUM *e; + BIGNUM *d; + BIGNUM *p; + BIGNUM *q; + BIGNUM *dmp1; + BIGNUM *dmq1; + BIGNUM *iqmp; + ...; +} RSA; typedef ... BN_GENCB; +static const int RSA_PKCS1_PADDING; +static const int RSA_SSLV23_PADDING; +static const int RSA_NO_PADDING; +static const int RSA_PKCS1_OAEP_PADDING; +static const int RSA_X931_PADDING; """ FUNCTIONS = """ RSA *RSA_new(); void RSA_free(RSA *); +int RSA_size(const RSA *); int RSA_generate_key_ex(RSA *, int, BIGNUM *, BN_GENCB *); int RSA_check_key(const RSA *); +RSA *RSAPublicKey_dup(RSA *); +int RSA_public_encrypt(int, const unsigned char *, unsigned char *, + RSA *, int); +int RSA_private_encrypt(int, const unsigned char *, unsigned char *, + RSA *, int); +int RSA_public_decrypt(int, const unsigned char *, unsigned char *, + RSA *, int); +int RSA_private_decrypt(int, const unsigned char *, unsigned char *, + RSA *, int); """ MACROS = """ |