--- /dev/null
+/* 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_EVP_H
+#define OPENSSL_HEADER_EVP_H
+
+#include <openssl/base.h>
+
+#include <openssl/thread.h>
+
+// OpenSSL included digest and cipher functions in this header so we include
+// them for users that still expect that.
+//
+// TODO(fork): clean up callers so that they include what they use.
+#include <openssl/aead.h>
+#include <openssl/base64.h>
+#include <openssl/cipher.h>
+#include <openssl/digest.h>
+#include <openssl/nid.h>
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+
+// EVP abstracts over public/private key algorithms.
+
+
+// Public key objects.
+
+// EVP_PKEY_new creates a new, empty public-key object and returns it or NULL
+// on allocation failure.
+OPENSSL_EXPORT EVP_PKEY *EVP_PKEY_new(void);
+
+// EVP_PKEY_free frees all data referenced by |pkey| and then frees |pkey|
+// itself.
+OPENSSL_EXPORT void EVP_PKEY_free(EVP_PKEY *pkey);
+
+// EVP_PKEY_up_ref increments the reference count of |pkey| and returns one.
+OPENSSL_EXPORT int EVP_PKEY_up_ref(EVP_PKEY *pkey);
+
+// EVP_PKEY_is_opaque returns one if |pkey| is opaque. Opaque keys are backed by
+// custom implementations which do not expose key material and parameters. It is
+// an error to attempt to duplicate, export, or compare an opaque key.
+OPENSSL_EXPORT int EVP_PKEY_is_opaque(const EVP_PKEY *pkey);
+
+// EVP_PKEY_cmp compares |a| and |b| and returns one if they are equal, zero if
+// not and a negative number on error.
+//
+// WARNING: this differs from the traditional return value of a "cmp"
+// function.
+OPENSSL_EXPORT int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b);
+
+// EVP_PKEY_copy_parameters sets the parameters of |to| to equal the parameters
+// of |from|. It returns one on success and zero on error.
+OPENSSL_EXPORT int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from);
+
+// EVP_PKEY_missing_parameters returns one if |pkey| is missing needed
+// parameters or zero if not, or if the algorithm doesn't take parameters.
+OPENSSL_EXPORT int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey);
+
+// EVP_PKEY_size returns the maximum size, in bytes, of a signature signed by
+// |pkey|. For an RSA key, this returns the number of bytes needed to represent
+// the modulus. For an EC key, this returns the maximum size of a DER-encoded
+// ECDSA signature.
+OPENSSL_EXPORT int EVP_PKEY_size(const EVP_PKEY *pkey);
+
+// EVP_PKEY_bits returns the "size", in bits, of |pkey|. For an RSA key, this
+// returns the bit length of the modulus. For an EC key, this returns the bit
+// length of the group order.
+OPENSSL_EXPORT int EVP_PKEY_bits(EVP_PKEY *pkey);
+
+// EVP_PKEY_id returns the type of |pkey|, which is one of the |EVP_PKEY_*|
+// values.
+OPENSSL_EXPORT int EVP_PKEY_id(const EVP_PKEY *pkey);
+
+// EVP_PKEY_type returns |nid| if |nid| is a known key type and |NID_undef|
+// otherwise.
+OPENSSL_EXPORT int EVP_PKEY_type(int nid);
+
+
+// Getting and setting concrete public key types.
+//
+// The following functions get and set the underlying public key in an
+// |EVP_PKEY| object. The |set1| functions take an additional reference to the
+// underlying key and return one on success or zero on error. The |assign|
+// functions adopt the caller's reference. The |get1| functions return a fresh
+// reference to the underlying object or NULL if |pkey| is not of the correct
+// type. The |get0| functions behave the same but return a non-owning
+// pointer.
+
+OPENSSL_EXPORT int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key);
+OPENSSL_EXPORT int EVP_PKEY_assign_RSA(EVP_PKEY *pkey, RSA *key);
+OPENSSL_EXPORT RSA *EVP_PKEY_get0_RSA(EVP_PKEY *pkey);
+OPENSSL_EXPORT RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey);
+
+OPENSSL_EXPORT int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key);
+OPENSSL_EXPORT int EVP_PKEY_assign_DSA(EVP_PKEY *pkey, DSA *key);
+OPENSSL_EXPORT DSA *EVP_PKEY_get0_DSA(EVP_PKEY *pkey);
+OPENSSL_EXPORT DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey);
+
+OPENSSL_EXPORT int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key);
+OPENSSL_EXPORT int EVP_PKEY_assign_EC_KEY(EVP_PKEY *pkey, EC_KEY *key);
+OPENSSL_EXPORT EC_KEY *EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey);
+OPENSSL_EXPORT EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey);
+
+// EVP_PKEY_new_ed25519_public returns a newly allocated |EVP_PKEY| wrapping an
+// Ed25519 public key, or NULL on allocation error.
+OPENSSL_EXPORT EVP_PKEY *EVP_PKEY_new_ed25519_public(
+ const uint8_t public_key[32]);
+
+// EVP_PKEY_new_ed25519_private returns a newly allocated |EVP_PKEY| wrapping an
+// Ed25519 private key, or NULL on allocation error.
+OPENSSL_EXPORT EVP_PKEY *EVP_PKEY_new_ed25519_private(
+ const uint8_t private_key[64]);
+
+#define EVP_PKEY_NONE NID_undef
+#define EVP_PKEY_RSA NID_rsaEncryption
+#define EVP_PKEY_DSA NID_dsa
+#define EVP_PKEY_EC NID_X9_62_id_ecPublicKey
+#define EVP_PKEY_ED25519 NID_ED25519
+
+// EVP_PKEY_assign sets the underlying key of |pkey| to |key|, which must be of
+// the given type. The |type| argument should be one of the |EVP_PKEY_*|
+// values.
+OPENSSL_EXPORT int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key);
+
+// EVP_PKEY_set_type sets the type of |pkey| to |type|, which should be one of
+// the |EVP_PKEY_*| values. It returns one if successful or zero otherwise. If
+// |pkey| is NULL, it simply reports whether the type is known.
+OPENSSL_EXPORT int EVP_PKEY_set_type(EVP_PKEY *pkey, int type);
+
+// EVP_PKEY_cmp_parameters compares the parameters of |a| and |b|. It returns
+// one if they match, zero if not, or a negative number of on error.
+//
+// WARNING: the return value differs from the usual return value convention.
+OPENSSL_EXPORT int EVP_PKEY_cmp_parameters(const EVP_PKEY *a,
+ const EVP_PKEY *b);
+
+
+// ASN.1 functions
+
+// EVP_parse_public_key decodes a DER-encoded SubjectPublicKeyInfo structure
+// (RFC 5280) from |cbs| and advances |cbs|. It returns a newly-allocated
+// |EVP_PKEY| or NULL on error.
+//
+// The caller must check the type of the parsed public key to ensure it is
+// suitable and validate other desired key properties such as RSA modulus size
+// or EC curve.
+OPENSSL_EXPORT EVP_PKEY *EVP_parse_public_key(CBS *cbs);
+
+// EVP_marshal_public_key marshals |key| as a DER-encoded SubjectPublicKeyInfo
+// structure (RFC 5280) and appends the result to |cbb|. It returns one on
+// success and zero on error.
+OPENSSL_EXPORT int EVP_marshal_public_key(CBB *cbb, const EVP_PKEY *key);
+
+// EVP_parse_private_key decodes a DER-encoded PrivateKeyInfo structure (RFC
+// 5208) from |cbs| and advances |cbs|. It returns a newly-allocated |EVP_PKEY|
+// or NULL on error.
+//
+// The caller must check the type of the parsed private key to ensure it is
+// suitable and validate other desired key properties such as RSA modulus size
+// or EC curve.
+//
+// A PrivateKeyInfo ends with an optional set of attributes. These are not
+// processed and so this function will silently ignore any trailing data in the
+// structure.
+OPENSSL_EXPORT EVP_PKEY *EVP_parse_private_key(CBS *cbs);
+
+// EVP_marshal_private_key marshals |key| as a DER-encoded PrivateKeyInfo
+// structure (RFC 5208) and appends the result to |cbb|. It returns one on
+// success and zero on error.
+OPENSSL_EXPORT int EVP_marshal_private_key(CBB *cbb, const EVP_PKEY *key);
+
+
+// Signing
+
+// EVP_DigestSignInit sets up |ctx| for a signing operation with |type| and
+// |pkey|. The |ctx| argument must have been initialised with
+// |EVP_MD_CTX_init|. If |pctx| is not NULL, the |EVP_PKEY_CTX| of the signing
+// operation will be written to |*pctx|; this can be used to set alternative
+// signing options.
+//
+// For single-shot signing algorithms which do not use a pre-hash, such as
+// Ed25519, |type| should be NULL. The |EVP_MD_CTX| itself is unused but is
+// present so the API is uniform. See |EVP_DigestSign|.
+//
+// It returns one on success, or zero on error.
+OPENSSL_EXPORT int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
+ const EVP_MD *type, ENGINE *e,
+ EVP_PKEY *pkey);
+
+// EVP_DigestSignUpdate appends |len| bytes from |data| to the data which will
+// be signed in |EVP_DigestSignFinal|. It returns one.
+//
+// This function performs a streaming signing operation and will fail for
+// signature algorithms which do not support this. Use |EVP_DigestSign| for a
+// single-shot operation.
+OPENSSL_EXPORT int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data,
+ size_t len);
+
+// EVP_DigestSignFinal signs the data that has been included by one or more
+// calls to |EVP_DigestSignUpdate|. If |out_sig| is NULL then |*out_sig_len| is
+// set to the maximum number of output bytes. Otherwise, on entry,
+// |*out_sig_len| must contain the length of the |out_sig| buffer. If the call
+// is successful, the signature is written to |out_sig| and |*out_sig_len| is
+// set to its length.
+//
+// This function performs a streaming signing operation and will fail for
+// signature algorithms which do not support this. Use |EVP_DigestSign| for a
+// single-shot operation.
+//
+// It returns one on success, or zero on error.
+OPENSSL_EXPORT int EVP_DigestSignFinal(EVP_MD_CTX *ctx, uint8_t *out_sig,
+ size_t *out_sig_len);
+
+// EVP_DigestSign signs |data_len| bytes from |data| using |ctx|. If |out_sig|
+// is NULL then |*out_sig_len| is set to the maximum number of output
+// bytes. Otherwise, on entry, |*out_sig_len| must contain the length of the
+// |out_sig| buffer. If the call is successful, the signature is written to
+// |out_sig| and |*out_sig_len| is set to its length.
+//
+// It returns one on success and zero on error.
+OPENSSL_EXPORT int EVP_DigestSign(EVP_MD_CTX *ctx, uint8_t *out_sig,
+ size_t *out_sig_len, const uint8_t *data,
+ size_t data_len);
+
+
+// Verifying
+
+// EVP_DigestVerifyInit sets up |ctx| for a signature verification operation
+// with |type| and |pkey|. The |ctx| argument must have been initialised with
+// |EVP_MD_CTX_init|. If |pctx| is not NULL, the |EVP_PKEY_CTX| of the signing
+// operation will be written to |*pctx|; this can be used to set alternative
+// signing options.
+//
+// For single-shot signing algorithms which do not use a pre-hash, such as
+// Ed25519, |type| should be NULL. The |EVP_MD_CTX| itself is unused but is
+// present so the API is uniform. See |EVP_DigestVerify|.
+//
+// It returns one on success, or zero on error.
+OPENSSL_EXPORT int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
+ const EVP_MD *type, ENGINE *e,
+ EVP_PKEY *pkey);
+
+// EVP_DigestVerifyUpdate appends |len| bytes from |data| to the data which
+// will be verified by |EVP_DigestVerifyFinal|. It returns one.
+//
+// This function performs streaming signature verification and will fail for
+// signature algorithms which do not support this. Use |EVP_PKEY_verify_message|
+// for a single-shot verification.
+OPENSSL_EXPORT int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data,
+ size_t len);
+
+// EVP_DigestVerifyFinal verifies that |sig_len| bytes of |sig| are a valid
+// signature for the data that has been included by one or more calls to
+// |EVP_DigestVerifyUpdate|. It returns one on success and zero otherwise.
+//
+// This function performs streaming signature verification and will fail for
+// signature algorithms which do not support this. Use |EVP_PKEY_verify_message|
+// for a single-shot verification.
+OPENSSL_EXPORT int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const uint8_t *sig,
+ size_t sig_len);
+
+// EVP_DigestVerify verifies that |sig_len| bytes from |sig| are a valid
+// signature for |data|. It returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_DigestVerify(EVP_MD_CTX *ctx, const uint8_t *sig,
+ size_t sig_len, const uint8_t *data,
+ size_t len);
+
+
+// Signing (old functions)
+
+// EVP_SignInit_ex configures |ctx|, which must already have been initialised,
+// for a fresh signing operation using the hash function |type|. It returns one
+// on success and zero otherwise.
+//
+// (In order to initialise |ctx|, either obtain it initialised with
+// |EVP_MD_CTX_create|, or use |EVP_MD_CTX_init|.)
+OPENSSL_EXPORT int EVP_SignInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type,
+ ENGINE *impl);
+
+// EVP_SignInit is a deprecated version of |EVP_SignInit_ex|.
+//
+// TODO(fork): remove.
+OPENSSL_EXPORT int EVP_SignInit(EVP_MD_CTX *ctx, const EVP_MD *type);
+
+// EVP_SignUpdate appends |len| bytes from |data| to the data which will be
+// signed in |EVP_SignFinal|.
+OPENSSL_EXPORT int EVP_SignUpdate(EVP_MD_CTX *ctx, const void *data,
+ size_t len);
+
+// EVP_SignFinal signs the data that has been included by one or more calls to
+// |EVP_SignUpdate|, using the key |pkey|, and writes it to |sig|. On entry,
+// |sig| must point to at least |EVP_PKEY_size(pkey)| bytes of space. The
+// actual size of the signature is written to |*out_sig_len|.
+//
+// It returns one on success and zero otherwise.
+//
+// It does not modify |ctx|, thus it's possible to continue to use |ctx| in
+// order to sign a longer message.
+OPENSSL_EXPORT int EVP_SignFinal(const EVP_MD_CTX *ctx, uint8_t *sig,
+ unsigned int *out_sig_len, EVP_PKEY *pkey);
+
+
+// Verifying (old functions)
+
+// EVP_VerifyInit_ex configures |ctx|, which must already have been
+// initialised, for a fresh signature verification operation using the hash
+// function |type|. It returns one on success and zero otherwise.
+//
+// (In order to initialise |ctx|, either obtain it initialised with
+// |EVP_MD_CTX_create|, or use |EVP_MD_CTX_init|.)
+OPENSSL_EXPORT int EVP_VerifyInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type,
+ ENGINE *impl);
+
+// EVP_VerifyInit is a deprecated version of |EVP_VerifyInit_ex|.
+//
+// TODO(fork): remove.
+OPENSSL_EXPORT int EVP_VerifyInit(EVP_MD_CTX *ctx, const EVP_MD *type);
+
+// EVP_VerifyUpdate appends |len| bytes from |data| to the data which will be
+// signed in |EVP_VerifyFinal|.
+OPENSSL_EXPORT int EVP_VerifyUpdate(EVP_MD_CTX *ctx, const void *data,
+ size_t len);
+
+// EVP_VerifyFinal verifies that |sig_len| bytes of |sig| are a valid
+// signature, by |pkey|, for the data that has been included by one or more
+// calls to |EVP_VerifyUpdate|.
+//
+// It returns one on success and zero otherwise.
+//
+// It does not modify |ctx|, thus it's possible to continue to use |ctx| in
+// order to sign a longer message.
+OPENSSL_EXPORT int EVP_VerifyFinal(EVP_MD_CTX *ctx, const uint8_t *sig,
+ size_t sig_len, EVP_PKEY *pkey);
+
+
+// Printing
+
+// EVP_PKEY_print_public prints a textual representation of the public key in
+// |pkey| to |out|. Returns one on success or zero otherwise.
+OPENSSL_EXPORT int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
+ int indent, ASN1_PCTX *pctx);
+
+// EVP_PKEY_print_private prints a textual representation of the private key in
+// |pkey| to |out|. Returns one on success or zero otherwise.
+OPENSSL_EXPORT int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
+ int indent, ASN1_PCTX *pctx);
+
+// EVP_PKEY_print_params prints a textual representation of the parameters in
+// |pkey| to |out|. Returns one on success or zero otherwise.
+OPENSSL_EXPORT int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
+ int indent, ASN1_PCTX *pctx);
+
+
+// Password stretching.
+//
+// Password stretching functions take a low-entropy password and apply a slow
+// function that results in a key suitable for use in symmetric
+// cryptography.
+
+// 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 error.
+OPENSSL_EXPORT int PKCS5_PBKDF2_HMAC(const char *password, size_t password_len,
+ const uint8_t *salt, size_t salt_len,
+ unsigned iterations, const EVP_MD *digest,
+ size_t key_len, uint8_t *out_key);
+
+// PKCS5_PBKDF2_HMAC_SHA1 is the same as PKCS5_PBKDF2_HMAC, but with |digest|
+// fixed to |EVP_sha1|.
+OPENSSL_EXPORT int PKCS5_PBKDF2_HMAC_SHA1(const char *password,
+ size_t password_len,
+ const uint8_t *salt, size_t salt_len,
+ unsigned iterations, size_t key_len,
+ uint8_t *out_key);
+
+// EVP_PBE_scrypt expands |password| into a secret key of length |key_len| using
+// scrypt, as described in RFC 7914, and writes the result to |out_key|. It
+// returns one on success and zero on error.
+//
+// |N|, |r|, and |p| are as described in RFC 7914 section 6. They determine the
+// cost of the operation. If the memory required exceeds |max_mem|, the
+// operation will fail instead. If |max_mem| is zero, a defult limit of 32MiB
+// will be used.
+OPENSSL_EXPORT int EVP_PBE_scrypt(const char *password, size_t password_len,
+ const uint8_t *salt, size_t salt_len,
+ uint64_t N, uint64_t r, uint64_t p,
+ size_t max_mem, uint8_t *out_key,
+ size_t key_len);
+
+
+// Public key contexts.
+//
+// |EVP_PKEY_CTX| objects hold the context of an operation (e.g. signing or
+// encrypting) that uses a public key.
+
+// EVP_PKEY_CTX_new allocates a fresh |EVP_PKEY_CTX| for use with |pkey|. It
+// returns the context or NULL on error.
+OPENSSL_EXPORT EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e);
+
+// EVP_PKEY_CTX_new_id allocates a fresh |EVP_PKEY_CTX| for a key of type |id|
+// (e.g. |EVP_PKEY_HMAC|). This can be used for key generation where
+// |EVP_PKEY_CTX_new| can't be used because there isn't an |EVP_PKEY| to pass
+// it. It returns the context or NULL on error.
+OPENSSL_EXPORT EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e);
+
+// EVP_PKEY_CTX_free frees |ctx| and the data it owns.
+OPENSSL_EXPORT void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx);
+
+// EVP_PKEY_CTX_dup allocates a fresh |EVP_PKEY_CTX| and sets it equal to the
+// state of |ctx|. It returns the fresh |EVP_PKEY_CTX| or NULL on error.
+OPENSSL_EXPORT EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *ctx);
+
+// EVP_PKEY_CTX_get0_pkey returns the |EVP_PKEY| associated with |ctx|.
+OPENSSL_EXPORT EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx);
+
+// EVP_PKEY_sign_init initialises an |EVP_PKEY_CTX| for a signing operation. It
+// should be called before |EVP_PKEY_sign|.
+//
+// It returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx);
+
+// EVP_PKEY_sign signs |digest_len| bytes from |digest| using |ctx|. If |sig| is
+// NULL, the maximum size of the signature is written to
+// |out_sig_len|. Otherwise, |*sig_len| must contain the number of bytes of
+// space available at |sig|. If sufficient, the signature will be written to
+// |sig| and |*sig_len| updated with the true length.
+//
+// This function expects a pre-hashed input and will fail for signature
+// algorithms which do not support this. Use |EVP_DigestSignInit| to sign an
+// unhashed input.
+//
+// WARNING: Setting |sig| to NULL only gives the maximum size of the
+// signature. The actual signature may be smaller.
+//
+// It returns one on success or zero on error. (Note: this differs from
+// OpenSSL, which can also return negative values to indicate an error. )
+OPENSSL_EXPORT int EVP_PKEY_sign(EVP_PKEY_CTX *ctx, uint8_t *sig,
+ size_t *sig_len, const uint8_t *digest,
+ size_t digest_len);
+
+// EVP_PKEY_verify_init initialises an |EVP_PKEY_CTX| for a signature
+// verification operation. It should be called before |EVP_PKEY_verify|.
+//
+// It returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx);
+
+// EVP_PKEY_verify verifies that |sig_len| bytes from |sig| are a valid
+// signature for |digest|.
+//
+// This function expects a pre-hashed input and will fail for signature
+// algorithms which do not support this. Use |EVP_DigestVerifyInit| to verify a
+// signature given the unhashed input.
+//
+// It returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_verify(EVP_PKEY_CTX *ctx, const uint8_t *sig,
+ size_t sig_len, const uint8_t *digest,
+ size_t digest_len);
+
+// EVP_PKEY_encrypt_init initialises an |EVP_PKEY_CTX| for an encryption
+// operation. It should be called before |EVP_PKEY_encrypt|.
+//
+// It returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_encrypt_init(EVP_PKEY_CTX *ctx);
+
+// EVP_PKEY_encrypt encrypts |in_len| bytes from |in|. If |out| is NULL, the
+// maximum size of the ciphertext is written to |out_len|. Otherwise, |*out_len|
+// must contain the number of bytes of space available at |out|. If sufficient,
+// the ciphertext will be written to |out| and |*out_len| updated with the true
+// length.
+//
+// WARNING: Setting |out| to NULL only gives the maximum size of the
+// ciphertext. The actual ciphertext may be smaller.
+//
+// It returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx, uint8_t *out,
+ size_t *out_len, const uint8_t *in,
+ size_t in_len);
+
+// EVP_PKEY_decrypt_init initialises an |EVP_PKEY_CTX| for a decryption
+// operation. It should be called before |EVP_PKEY_decrypt|.
+//
+// It returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx);
+
+// EVP_PKEY_decrypt decrypts |in_len| bytes from |in|. If |out| is NULL, the
+// maximum size of the plaintext is written to |out_len|. Otherwise, |*out_len|
+// must contain the number of bytes of space available at |out|. If sufficient,
+// the ciphertext will be written to |out| and |*out_len| updated with the true
+// length.
+//
+// WARNING: Setting |out| to NULL only gives the maximum size of the
+// plaintext. The actual plaintext may be smaller.
+//
+// It returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx, uint8_t *out,
+ size_t *out_len, const uint8_t *in,
+ size_t in_len);
+
+// EVP_PKEY_verify_recover_init initialises an |EVP_PKEY_CTX| for a public-key
+// decryption operation. It should be called before |EVP_PKEY_verify_recover|.
+//
+// Public-key decryption is a very obscure operation that is only implemented
+// by RSA keys. It is effectively a signature verification operation that
+// returns the signed message directly. It is almost certainly not what you
+// want.
+//
+// It returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx);
+
+// EVP_PKEY_verify_recover decrypts |sig_len| bytes from |sig|. If |out| is
+// NULL, the maximum size of the plaintext is written to |out_len|. Otherwise,
+// |*out_len| must contain the number of bytes of space available at |out|. If
+// sufficient, the ciphertext will be written to |out| and |*out_len| updated
+// with the true length.
+//
+// WARNING: Setting |out| to NULL only gives the maximum size of the
+// plaintext. The actual plaintext may be smaller.
+//
+// See the warning about this operation in |EVP_PKEY_verify_recover_init|. It
+// is probably not what you want.
+//
+// It returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx, uint8_t *out,
+ size_t *out_len, const uint8_t *sig,
+ size_t siglen);
+
+// EVP_PKEY_derive_init initialises an |EVP_PKEY_CTX| for a key derivation
+// operation. It should be called before |EVP_PKEY_derive_set_peer| and
+// |EVP_PKEY_derive|.
+//
+// It returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_derive_init(EVP_PKEY_CTX *ctx);
+
+// EVP_PKEY_derive_set_peer sets the peer's key to be used for key derivation
+// by |ctx| to |peer|. It should be called after |EVP_PKEY_derive_init|. (For
+// example, this is used to set the peer's key in (EC)DH.) It returns one on
+// success and zero on error.
+OPENSSL_EXPORT int EVP_PKEY_derive_set_peer(EVP_PKEY_CTX *ctx, EVP_PKEY *peer);
+
+// EVP_PKEY_derive derives a shared key between the two keys configured in
+// |ctx|. If |key| is non-NULL then, on entry, |out_key_len| must contain the
+// amount of space at |key|. If sufficient then the shared key will be written
+// to |key| and |*out_key_len| will be set to the length. If |key| is NULL then
+// |out_key_len| will be set to the maximum length.
+//
+// WARNING: Setting |out| to NULL only gives the maximum size of the key. The
+// actual key may be smaller.
+//
+// It returns one on success and zero on error.
+OPENSSL_EXPORT int EVP_PKEY_derive(EVP_PKEY_CTX *ctx, uint8_t *key,
+ size_t *out_key_len);
+
+// EVP_PKEY_keygen_init initialises an |EVP_PKEY_CTX| for a key generation
+// operation. It should be called before |EVP_PKEY_keygen|.
+//
+// It returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx);
+
+// EVP_PKEY_keygen performs a key generation operation using the values from
+// |ctx| and sets |*ppkey| to a fresh |EVP_PKEY| containing the resulting key.
+// It returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey);
+
+
+// Generic control functions.
+
+// EVP_PKEY_CTX_set_signature_md sets |md| as the digest to be used in a
+// signature operation. It returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_CTX_set_signature_md(EVP_PKEY_CTX *ctx,
+ const EVP_MD *md);
+
+// EVP_PKEY_CTX_get_signature_md sets |*out_md| to the digest to be used in a
+// signature operation. It returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_CTX_get_signature_md(EVP_PKEY_CTX *ctx,
+ const EVP_MD **out_md);
+
+
+// RSA specific control functions.
+
+// EVP_PKEY_CTX_set_rsa_padding sets the padding type to use. It should be one
+// of the |RSA_*_PADDING| values. Returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_CTX_set_rsa_padding(EVP_PKEY_CTX *ctx, int padding);
+
+// EVP_PKEY_CTX_get_rsa_padding sets |*out_padding| to the current padding
+// value, which is one of the |RSA_*_PADDING| values. Returns one on success or
+// zero on error.
+OPENSSL_EXPORT int EVP_PKEY_CTX_get_rsa_padding(EVP_PKEY_CTX *ctx,
+ int *out_padding);
+
+// EVP_PKEY_CTX_set_rsa_pss_saltlen sets the length of the salt in a PSS-padded
+// signature. A value of -1 cause the salt to be the same length as the digest
+// in the signature. A value of -2 causes the salt to be the maximum length
+// that will fit when signing and recovered from the signature when verifying.
+// Otherwise the value gives the size of the salt in bytes.
+//
+// If unsure, use -1.
+//
+// Returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_CTX_set_rsa_pss_saltlen(EVP_PKEY_CTX *ctx,
+ int salt_len);
+
+// EVP_PKEY_CTX_get_rsa_pss_saltlen sets |*out_salt_len| to the salt length of
+// a PSS-padded signature. See the documentation for
+// |EVP_PKEY_CTX_set_rsa_pss_saltlen| for details of the special values that it
+// can take.
+//
+// Returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_CTX_get_rsa_pss_saltlen(EVP_PKEY_CTX *ctx,
+ int *out_salt_len);
+
+// EVP_PKEY_CTX_set_rsa_keygen_bits sets the size of the desired RSA modulus,
+// in bits, for key generation. Returns one on success or zero on
+// error.
+OPENSSL_EXPORT int EVP_PKEY_CTX_set_rsa_keygen_bits(EVP_PKEY_CTX *ctx,
+ int bits);
+
+// EVP_PKEY_CTX_set_rsa_keygen_pubexp sets |e| as the public exponent for key
+// generation. Returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_CTX_set_rsa_keygen_pubexp(EVP_PKEY_CTX *ctx,
+ BIGNUM *e);
+
+// EVP_PKEY_CTX_set_rsa_oaep_md sets |md| as the digest used in OAEP padding.
+// Returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_CTX_set_rsa_oaep_md(EVP_PKEY_CTX *ctx,
+ const EVP_MD *md);
+
+// EVP_PKEY_CTX_get_rsa_oaep_md sets |*out_md| to the digest function used in
+// OAEP padding. Returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_CTX_get_rsa_oaep_md(EVP_PKEY_CTX *ctx,
+ const EVP_MD **out_md);
+
+// EVP_PKEY_CTX_set_rsa_mgf1_md sets |md| as the digest used in MGF1. Returns
+// one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_CTX_set_rsa_mgf1_md(EVP_PKEY_CTX *ctx,
+ const EVP_MD *md);
+
+// EVP_PKEY_CTX_get_rsa_mgf1_md sets |*out_md| to the digest function used in
+// MGF1. Returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_CTX_get_rsa_mgf1_md(EVP_PKEY_CTX *ctx,
+ const EVP_MD **out_md);
+
+// EVP_PKEY_CTX_set0_rsa_oaep_label sets |label_len| bytes from |label| as the
+// label used in OAEP. DANGER: On success, this call takes ownership of |label|
+// and will call |OPENSSL_free| on it when |ctx| is destroyed.
+//
+// Returns one on success or zero on error.
+OPENSSL_EXPORT int EVP_PKEY_CTX_set0_rsa_oaep_label(EVP_PKEY_CTX *ctx,
+ uint8_t *label,
+ size_t label_len);
+
+// EVP_PKEY_CTX_get0_rsa_oaep_label sets |*out_label| to point to the internal
+// buffer containing the OAEP label (which may be NULL) and returns the length
+// of the label or a negative value on error.
+//
+// WARNING: the return value differs from the usual return value convention.
+OPENSSL_EXPORT int EVP_PKEY_CTX_get0_rsa_oaep_label(EVP_PKEY_CTX *ctx,
+ const uint8_t **out_label);
+
+
+// Deprecated functions.
+
+// EVP_PKEY_DH is defined for compatibility, but it is impossible to create an
+// |EVP_PKEY| of that type.
+#define EVP_PKEY_DH NID_dhKeyAgreement
+
+// EVP_PKEY_RSA2 was historically an alternate form for RSA public keys (OID
+// 2.5.8.1.1), but is no longer accepted.
+#define EVP_PKEY_RSA2 NID_rsa
+
+// OpenSSL_add_all_algorithms does nothing.
+OPENSSL_EXPORT void OpenSSL_add_all_algorithms(void);
+
+// OPENSSL_add_all_algorithms_conf does nothing.
+OPENSSL_EXPORT void OPENSSL_add_all_algorithms_conf(void);
+
+// OpenSSL_add_all_ciphers does nothing.
+OPENSSL_EXPORT void OpenSSL_add_all_ciphers(void);
+
+// OpenSSL_add_all_digests does nothing.
+OPENSSL_EXPORT void OpenSSL_add_all_digests(void);
+
+// EVP_cleanup does nothing.
+OPENSSL_EXPORT void EVP_cleanup(void);
+
+OPENSSL_EXPORT void EVP_CIPHER_do_all_sorted(
+ void (*callback)(const EVP_CIPHER *cipher, const char *name,
+ const char *unused, void *arg),
+ void *arg);
+
+OPENSSL_EXPORT void EVP_MD_do_all_sorted(void (*callback)(const EVP_MD *cipher,
+ const char *name,
+ const char *unused,
+ void *arg),
+ void *arg);
+
+// i2d_PrivateKey marshals a private key from |key| to an ASN.1, DER
+// structure. If |outp| is not NULL then the result is written to |*outp| and
+// |*outp| is advanced just past the output. It returns the number of bytes in
+// the result, whether written or not, or a negative value on error.
+//
+// RSA keys are serialized as a DER-encoded RSAPublicKey (RFC 3447) structure.
+// EC keys are serialized as a DER-encoded ECPrivateKey (RFC 5915) structure.
+//
+// Use |RSA_marshal_private_key| or |EC_KEY_marshal_private_key| instead.
+OPENSSL_EXPORT int i2d_PrivateKey(const EVP_PKEY *key, uint8_t **outp);
+
+// i2d_PublicKey marshals a public key from |key| to a type-specific format.
+// If |outp| is not NULL then the result is written to |*outp| and
+// |*outp| is advanced just past the output. It returns the number of bytes in
+// the result, whether written or not, or a negative value on error.
+//
+// RSA keys are serialized as a DER-encoded RSAPublicKey (RFC 3447) structure.
+// EC keys are serialized as an EC point per SEC 1.
+//
+// Use |RSA_marshal_public_key| or |EC_POINT_point2cbb| instead.
+OPENSSL_EXPORT int i2d_PublicKey(EVP_PKEY *key, uint8_t **outp);
+
+// d2i_PrivateKey parses an ASN.1, DER-encoded, private key from |len| bytes at
+// |*inp|. If |out| is not NULL then, on exit, a pointer to the result is in
+// |*out|. Note that, even if |*out| is already non-NULL on entry, it will not
+// be written to. Rather, a fresh |EVP_PKEY| is allocated and the previous one
+// is freed. On successful exit, |*inp| is advanced past the DER structure. It
+// returns the result or NULL on error.
+//
+// This function tries to detect one of several formats. Instead, use
+// |EVP_parse_private_key| for a PrivateKeyInfo, |RSA_parse_private_key| for an
+// RSAPrivateKey, and |EC_parse_private_key| for an ECPrivateKey.
+OPENSSL_EXPORT EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **out,
+ const uint8_t **inp, long len);
+
+// d2i_AutoPrivateKey acts the same as |d2i_PrivateKey|, but detects the type
+// of the private key.
+//
+// This function tries to detect one of several formats. Instead, use
+// |EVP_parse_private_key| for a PrivateKeyInfo, |RSA_parse_private_key| for an
+// RSAPrivateKey, and |EC_parse_private_key| for an ECPrivateKey.
+OPENSSL_EXPORT EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **out, const uint8_t **inp,
+ long len);
+
+// EVP_PKEY_get0_DH returns NULL.
+OPENSSL_EXPORT DH *EVP_PKEY_get0_DH(EVP_PKEY *pkey);
+
+
+// Private structures.
+
+struct evp_pkey_st {
+ CRYPTO_refcount_t references;
+
+ // type contains one of the EVP_PKEY_* values or NID_undef and determines
+ // which element (if any) of the |pkey| union is valid.
+ int type;
+
+ union {
+ void *ptr;
+ RSA *rsa;
+ DSA *dsa;
+ DH *dh;
+ EC_KEY *ec;
+ } pkey;
+
+ // ameth contains a pointer to a method table that contains many ASN.1
+ // methods for the key type.
+ const EVP_PKEY_ASN1_METHOD *ameth;
+} /* EVP_PKEY */;
+
+
+#if defined(__cplusplus)
+} // extern C
+
+extern "C++" {
+namespace bssl {
+
+BORINGSSL_MAKE_DELETER(EVP_PKEY, EVP_PKEY_free)
+BORINGSSL_MAKE_DELETER(EVP_PKEY_CTX, EVP_PKEY_CTX_free)
+
+} // namespace bssl
+
+} // extern C++
+
+#endif
+
+#define EVP_R_BUFFER_TOO_SMALL 100
+#define EVP_R_COMMAND_NOT_SUPPORTED 101
+#define EVP_R_DECODE_ERROR 102
+#define EVP_R_DIFFERENT_KEY_TYPES 103
+#define EVP_R_DIFFERENT_PARAMETERS 104
+#define EVP_R_ENCODE_ERROR 105
+#define EVP_R_EXPECTING_AN_EC_KEY_KEY 106
+#define EVP_R_EXPECTING_AN_RSA_KEY 107
+#define EVP_R_EXPECTING_A_DSA_KEY 108
+#define EVP_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE 109
+#define EVP_R_INVALID_DIGEST_LENGTH 110
+#define EVP_R_INVALID_DIGEST_TYPE 111
+#define EVP_R_INVALID_KEYBITS 112
+#define EVP_R_INVALID_MGF1_MD 113
+#define EVP_R_INVALID_OPERATION 114
+#define EVP_R_INVALID_PADDING_MODE 115
+#define EVP_R_INVALID_PSS_SALTLEN 116
+#define EVP_R_KEYS_NOT_SET 117
+#define EVP_R_MISSING_PARAMETERS 118
+#define EVP_R_NO_DEFAULT_DIGEST 119
+#define EVP_R_NO_KEY_SET 120
+#define EVP_R_NO_MDC2_SUPPORT 121
+#define EVP_R_NO_NID_FOR_CURVE 122
+#define EVP_R_NO_OPERATION_SET 123
+#define EVP_R_NO_PARAMETERS_SET 124
+#define EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE 125
+#define EVP_R_OPERATON_NOT_INITIALIZED 126
+#define EVP_R_UNKNOWN_PUBLIC_KEY_TYPE 127
+#define EVP_R_UNSUPPORTED_ALGORITHM 128
+#define EVP_R_UNSUPPORTED_PUBLIC_KEY_TYPE 129
+#define EVP_R_NOT_A_PRIVATE_KEY 130
+#define EVP_R_INVALID_SIGNATURE 131
+#define EVP_R_MEMORY_LIMIT_EXCEEDED 132
+#define EVP_R_INVALID_PARAMETERS 133
+
+#endif // OPENSSL_HEADER_EVP_H
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