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boringssl/crypto/rsa/internal.h

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Inital import. Initial fork from f2d678e6e89b6508147086610e985d4e8416e867 (1.0.2 beta). (This change contains substantial changes from the original and effectively starts a new history.)
2014-06-20 20:00:00 +01:00
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* 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 the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.] */
#ifndef OPENSSL_HEADER_RSA_INTERNAL_H
#define OPENSSL_HEADER_RSA_INTERNAL_H
#include <openssl/base.h>
#if defined(__cplusplus)
extern "C" {
#endif
Make it possible for a static linker to discard unused RSA functions. Having a single RSA_METHOD means they all get pulled in. Notably, RSA key generation pulls in the primality-checking code. Change-Id: Iece480113754da090ddf87b64d8769f01e05d26c Reviewed-on: https://boringssl-review.googlesource.com/6389 Reviewed-by: Adam Langley <agl@google.com>
2015-10-29 17:19:12 +00:00
/* Default implementations of RSA operations. */
extern const RSA_METHOD RSA_default_method;
size_t rsa_default_size(const RSA *rsa);
int rsa_default_encrypt(RSA *rsa, size_t *out_len, uint8_t *out, size_t max_out,
const uint8_t *in, size_t in_len, int padding);
int rsa_default_sign_raw(RSA *rsa, size_t *out_len, uint8_t *out,
size_t max_out, const uint8_t *in, size_t in_len,
int padding);
int rsa_default_decrypt(RSA *rsa, size_t *out_len, uint8_t *out, size_t max_out,
const uint8_t *in, size_t in_len, int padding);
int rsa_default_verify_raw(RSA *rsa, size_t *out_len, uint8_t *out,
size_t max_out, const uint8_t *in, size_t in_len,
int padding);
int rsa_default_private_transform(RSA *rsa, uint8_t *out, const uint8_t *in,
size_t len);
int rsa_default_multi_prime_keygen(RSA *rsa, int bits, int num_primes,
BIGNUM *e_value, BN_GENCB *cb);
int rsa_default_keygen(RSA *rsa, int bits, BIGNUM *e_value, BN_GENCB *cb);
Inital import. Initial fork from f2d678e6e89b6508147086610e985d4e8416e867 (1.0.2 beta). (This change contains substantial changes from the original and effectively starts a new history.)
2014-06-20 20:00:00 +01:00
#define RSA_PKCS1_PADDING_SIZE 11
BN_BLINDING *BN_BLINDING_new(const BIGNUM *A, const BIGNUM *Ai, BIGNUM *mod);
void BN_BLINDING_free(BN_BLINDING *b);
Always use |BN_mod_exp_mont|/|BN_mod_exp_mont_consttime| in RSA. This removes a hard dependency on |BN_mod_exp|, which will allow the linker to drop it in programs that don't use other features that require it. Also, remove the |mont| member of |bn_blinding_st| in favor of having callers pass it when necssaary. The |mont| member was a weak reference, and weak references tend to be error-prone. Finally, reduce the scope of some parts of the blinding code to |static|. Change-Id: I16d8ccc2d6d950c1bb40377988daf1a377a21fe6 Reviewed-on: https://boringssl-review.googlesource.com/7111 Reviewed-by: David Benjamin <davidben@google.com>
2016-02-09 06:36:51 +00:00
int BN_BLINDING_convert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx,
const BN_MONT_CTX *mont_ctx);
Remove unused bits of RSA blinding code. The |_ex| versions of these functions are unnecessary because when they are used, they are always passed |NULL| for |r|, which is what the non-|_ex| versions do. Just use the non-|_ex| versions instead and remove the |_ex| versions. Also, drop the unused flags mechanism. Change-Id: Ida4cb5a2d4c89d9cd318e06f71867aea98408d0d Reviewed-on: https://boringssl-review.googlesource.com/7110 Reviewed-by: David Benjamin <davidben@google.com>
2016-01-25 09:41:56 +00:00
int BN_BLINDING_invert(BIGNUM *n, const BN_BLINDING *b, BN_CTX *ctx);
Inital import. Initial fork from f2d678e6e89b6508147086610e985d4e8416e867 (1.0.2 beta). (This change contains substantial changes from the original and effectively starts a new history.)
2014-06-20 20:00:00 +01:00
BN_BLINDING *rsa_setup_blinding(RSA *rsa, BN_CTX *in_ctx);
int RSA_padding_add_PKCS1_type_1(uint8_t *to, unsigned to_len,
const uint8_t *from, unsigned from_len);
int RSA_padding_check_PKCS1_type_1(uint8_t *to, unsigned to_len,
Improvements in constant-time OAEP decoding. This change adds a new function, BN_bn2bin_padded, that attempts, as much as possible, to serialise a BIGNUM in constant time. This is used to avoid some timing leaks in RSA decryption.
2014-06-20 20:00:00 +01:00
const uint8_t *from, unsigned from_len);
Inital import. Initial fork from f2d678e6e89b6508147086610e985d4e8416e867 (1.0.2 beta). (This change contains substantial changes from the original and effectively starts a new history.)
2014-06-20 20:00:00 +01:00
int RSA_padding_add_PKCS1_type_2(uint8_t *to, unsigned to_len,
const uint8_t *from, unsigned from_len);
int RSA_padding_check_PKCS1_type_2(uint8_t *to, unsigned to_len,
Improvements in constant-time OAEP decoding. This change adds a new function, BN_bn2bin_padded, that attempts, as much as possible, to serialise a BIGNUM in constant time. This is used to avoid some timing leaks in RSA decryption.
2014-06-20 20:00:00 +01:00
const uint8_t *from, unsigned from_len);
Inital import. Initial fork from f2d678e6e89b6508147086610e985d4e8416e867 (1.0.2 beta). (This change contains substantial changes from the original and effectively starts a new history.)
2014-06-20 20:00:00 +01:00
int RSA_padding_add_PKCS1_OAEP_mgf1(uint8_t *to, unsigned to_len,
const uint8_t *from, unsigned from_len,
const uint8_t *param, unsigned plen,
const EVP_MD *md, const EVP_MD *mgf1md);
int RSA_padding_check_PKCS1_OAEP_mgf1(uint8_t *to, unsigned to_len,
const uint8_t *from, unsigned from_len,
Improvements in constant-time OAEP decoding. This change adds a new function, BN_bn2bin_padded, that attempts, as much as possible, to serialise a BIGNUM in constant time. This is used to avoid some timing leaks in RSA decryption.
2014-06-20 20:00:00 +01:00
const uint8_t *param, unsigned plen,
const EVP_MD *md, const EVP_MD *mgf1md);
Inital import. Initial fork from f2d678e6e89b6508147086610e985d4e8416e867 (1.0.2 beta). (This change contains substantial changes from the original and effectively starts a new history.)
2014-06-20 20:00:00 +01:00
int RSA_padding_add_none(uint8_t *to, unsigned to_len, const uint8_t *from,
unsigned from_len);
Split off private_transform function in RSA. This change extracts two, common parts of RSA_decrypt and RSA_sign into a function called |private_transform|. It also allows this to be overridden in a method, which is convenient for opaque keys that only expose the raw RSA transform as it means that the padding code from BoringSSL can be easily reimplemented. One significant change here is that short RSA ciphertexts will no longer be accepted. I think this is correct and OpenSSL has a comment about PGP mistakenly stripping leading zeros. However, these is the possibility that it could break something. Change-Id: I258c5cbbf21314cc9b6e8d2a2b898fd9a440cd40 Reviewed-on: https://boringssl-review.googlesource.com/1554 Reviewed-by: Adam Langley <agl@google.com>
2014-08-18 21:29:45 +01:00
/* RSA_private_transform calls either the method-specific |private_transform|
* function (if given) or the generic one. See the comment for
* |private_transform| in |rsa_meth_st|. */
int RSA_private_transform(RSA *rsa, uint8_t *out, const uint8_t *in,
size_t len);
Inital import. Initial fork from f2d678e6e89b6508147086610e985d4e8416e867 (1.0.2 beta). (This change contains substantial changes from the original and effectively starts a new history.)
2014-06-20 20:00:00 +01:00
Multi-prime RSA support. RSA with more than two primes is specified in https://tools.ietf.org/html/rfc3447, although the idea goes back far earier than that. This change ports some of the changes in http://rt.openssl.org/Ticket/Display.html?id=3477&user=guest&pass=guest to BoringSSL—specifically those bits that are under an OpenSSL license. Change-Id: I51e8e345e2148702b8ce12e00518f6ef4683d3e1 Reviewed-on: https://boringssl-review.googlesource.com/4870 Reviewed-by: Adam Langley <agl@google.com>
2015-05-26 19:36:46 +01:00
/* RSA_additional_prime contains information about the third, forth etc prime
* in a multi-prime RSA key. */
typedef struct RSA_additional_prime_st {
BIGNUM *prime;
/* exp is d^{prime-1} mod prime */
BIGNUM *exp;
/* coeff is such that r×coeff ≡ 1 mod prime. */
BIGNUM *coeff;
/* Values below here are not in the ASN.1 serialisation. */
/* r is the product of all primes (including p and q) prior to this one. */
BIGNUM *r;
Free BN_MONT_CTX in generic code. Although those are only created by code owned by RSA_METHOD, custom RSA_METHODs shouldn't be allowed to squat our internal fields and then change how you free things. Remove 'method' from their names now that they're not method-specific. Change-Id: I9494ef9a7754ad59ac9fba7fd463b3336d826e0b Reviewed-on: https://boringssl-review.googlesource.com/6423 Reviewed-by: Adam Langley <agl@google.com>
2015-11-03 23:24:07 +00:00
/* mont is a |BN_MONT_CTX| modulo |prime|. */
BN_MONT_CTX *mont;
Multi-prime RSA support. RSA with more than two primes is specified in https://tools.ietf.org/html/rfc3447, although the idea goes back far earier than that. This change ports some of the changes in http://rt.openssl.org/Ticket/Display.html?id=3477&user=guest&pass=guest to BoringSSL—specifically those bits that are under an OpenSSL license. Change-Id: I51e8e345e2148702b8ce12e00518f6ef4683d3e1 Reviewed-on: https://boringssl-review.googlesource.com/4870 Reviewed-by: Adam Langley <agl@google.com>
2015-05-26 19:36:46 +01:00
} RSA_additional_prime;
void RSA_additional_prime_free(RSA_additional_prime *ap);
Inital import. Initial fork from f2d678e6e89b6508147086610e985d4e8416e867 (1.0.2 beta). (This change contains substantial changes from the original and effectively starts a new history.)
2014-06-20 20:00:00 +01:00
#if defined(__cplusplus)
} /* extern C */
#endif
#endif /* OPENSSL_HEADER_RSA_INTERNAL_H */
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