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openssl/crypto/evp/pmeth_lib.c

Index: openssl/crypto/evp/pmeth_lib.c
===================================================================
--- openssl/crypto/evp/pmeth_lib.c	(revision 0)
+++ openssl/crypto/evp/pmeth_lib.c	(revision 0)
@@ -0,0 +1,540 @@
+/* pmeth_lib.c */
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project 2006.
+ */
+/* ====================================================================
+ * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
+ *
+ * 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 above 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 acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "cryptlib.h"
+#include <openssl/objects.h>
+#include <openssl/evp.h>
+#ifndef OPENSSL_NO_ENGINE
+#include <openssl/engine.h>
+#endif
+#include "asn1_locl.h"
+#include "evp_locl.h"
+
+typedef int sk_cmp_fn_type(const char * const *a, const char * const *b);
+
+DECLARE_STACK_OF(EVP_PKEY_METHOD)
+STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
+
+extern const EVP_PKEY_METHOD rsa_pkey_meth, dh_pkey_meth, dsa_pkey_meth;
+extern const EVP_PKEY_METHOD ec_pkey_meth, hmac_pkey_meth;
+
+static const EVP_PKEY_METHOD *standard_methods[] =
+	{
+#ifndef OPENSSL_NO_RSA
+	&rsa_pkey_meth,
+#endif
+#ifndef OPENSSL_NO_DH
+	&dh_pkey_meth,
+#endif
+#ifndef OPENSSL_NO_DSA
+	&dsa_pkey_meth,
+#endif
+#ifndef OPENSSL_NO_EC
+	&ec_pkey_meth,
+#endif
+	&hmac_pkey_meth,
+	};
+
+DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
+			   pmeth);
+
+static int pmeth_cmp(const EVP_PKEY_METHOD * const *a,
+		     const EVP_PKEY_METHOD * const *b)
+	{
+        return ((*a)->pkey_id - (*b)->pkey_id);
+	}
+
+IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
+			     pmeth);
+
+const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
+	{
+	EVP_PKEY_METHOD tmp;
+	const EVP_PKEY_METHOD *t = &tmp, **ret;
+	tmp.pkey_id = type;
+	if (app_pkey_methods)
+		{
+		int idx;
+		idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
+		if (idx >= 0)
+			return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
+		}
+	ret = OBJ_bsearch_pmeth(&t, standard_methods,
+			  sizeof(standard_methods)/sizeof(EVP_PKEY_METHOD *));
+	if (!ret || !*ret)
+		return NULL;
+	return *ret;
+	}
+
+static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
+	{
+	EVP_PKEY_CTX *ret;
+	const EVP_PKEY_METHOD *pmeth;
+	if (id == -1)
+		{
+		if (!pkey || !pkey->ameth)
+			return NULL;
+		id = pkey->ameth->pkey_id;
+		}
+#ifndef OPENSSL_NO_ENGINE
+	if (pkey && pkey->engine)
+		e = pkey->engine;
+	/* Try to find an ENGINE which implements this method */
+	if (e)
+		{
+		if (!ENGINE_init(e))
+			{
+			EVPerr(EVP_F_INT_CTX_NEW,ERR_R_ENGINE_LIB);
+			return NULL;
+			}
+		}
+	else
+		e = ENGINE_get_pkey_meth_engine(id);
+
+	/* If an ENGINE handled this method look it up. Othewise
+	 * use internal tables.
+	 */
+
+	if (e)
+		pmeth = ENGINE_get_pkey_meth(e, id);
+	else
+#endif
+		pmeth = EVP_PKEY_meth_find(id);
+
+	if (pmeth == NULL)
+		{
+		EVPerr(EVP_F_INT_CTX_NEW,EVP_R_UNSUPPORTED_ALGORITHM);
+		return NULL;
+		}
+
+	ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
+	if (!ret)
+		{
+#ifndef OPENSSL_NO_ENGINE
+		if (e)
+			ENGINE_finish(e);
+#endif
+		EVPerr(EVP_F_INT_CTX_NEW,ERR_R_MALLOC_FAILURE);
+		return NULL;
+		}
+	ret->engine = e;
+	ret->pmeth = pmeth;
+	ret->operation = EVP_PKEY_OP_UNDEFINED;
+	ret->pkey = pkey;
+	ret->peerkey = NULL;
+	ret->pkey_gencb = 0;
+	if (pkey)
+		CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
+	ret->data = NULL;
+
+	if (pmeth->init)
+		{
+		if (pmeth->init(ret) <= 0)
+			{
+			EVP_PKEY_CTX_free(ret);
+			return NULL;
+			}
+		}
+
+	return ret;
+	}
+
+EVP_PKEY_METHOD* EVP_PKEY_meth_new(int id, int flags)
+	{
+	EVP_PKEY_METHOD *pmeth;
+	pmeth = OPENSSL_malloc(sizeof(EVP_PKEY_METHOD));
+	if (!pmeth)
+		return NULL;
+
+	pmeth->pkey_id = id;
+	pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
+
+	pmeth->init = 0;
+	pmeth->copy = 0;
+	pmeth->cleanup = 0;
+	pmeth->paramgen_init = 0;
+	pmeth->paramgen = 0;
+	pmeth->keygen_init = 0;
+	pmeth->keygen = 0;
+	pmeth->sign_init = 0;
+	pmeth->sign = 0;
+	pmeth->verify_init = 0;
+	pmeth->verify = 0;
+	pmeth->verify_recover_init = 0;
+	pmeth->verify_recover = 0;
+	pmeth->signctx_init = 0;
+	pmeth->signctx = 0;
+	pmeth->verifyctx_init = 0;
+	pmeth->verifyctx = 0;
+	pmeth->encrypt_init = 0;
+	pmeth->encrypt = 0;
+	pmeth->decrypt_init = 0;
+	pmeth->decrypt = 0;
+	pmeth->derive_init = 0;
+	pmeth->derive = 0;
+	pmeth->ctrl = 0;
+	pmeth->ctrl_str = 0;
+
+	return pmeth;
+	}
+
+void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
+	{
+	if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
+		OPENSSL_free(pmeth);
+	}
+
+EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
+	{
+	return int_ctx_new(pkey, e, -1);
+	}
+
+EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
+	{
+	return int_ctx_new(NULL, e, id);
+	}
+
+EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
+	{
+	EVP_PKEY_CTX *rctx;
+	if (!pctx->pmeth || !pctx->pmeth->copy)
+		return NULL;
+#ifndef OPENSSL_NO_ENGINE
+	/* Make sure it's safe to copy a pkey context using an ENGINE */
+	if (pctx->engine && !ENGINE_init(pctx->engine))
+		{
+		EVPerr(EVP_F_EVP_PKEY_CTX_DUP,ERR_R_ENGINE_LIB);
+		return 0;
+		}
+#endif
+	rctx = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
+	if (!rctx)
+		return NULL;
+
+	rctx->pmeth = pctx->pmeth;
+#ifndef OPENSSL_NO_ENGINE
+	rctx->engine = pctx->engine;
+#endif
+
+	if (pctx->pkey)
+		CRYPTO_add(&pctx->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
+
+	rctx->pkey = pctx->pkey;
+
+	if (pctx->peerkey)
+		CRYPTO_add(&pctx->peerkey->references,1,CRYPTO_LOCK_EVP_PKEY);
+
+	rctx->peerkey = pctx->peerkey;
+
+	rctx->data = NULL;
+	rctx->app_data = NULL;
+	rctx->operation = pctx->operation;
+
+	if (pctx->pmeth->copy(rctx, pctx) > 0)
+		return rctx;
+
+	EVP_PKEY_CTX_free(rctx);
+	return NULL;
+
+	}
+
+int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
+	{
+	if (app_pkey_methods == NULL)
+		{
+		app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
+		if (!app_pkey_methods)
+			return 0;
+		}
+	if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
+		return 0;
+	sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
+	return 1;
+	}
+
+void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
+	{
+	if (ctx == NULL)
+		return;
+	if (ctx->pmeth && ctx->pmeth->cleanup)
+		ctx->pmeth->cleanup(ctx);
+	if (ctx->pkey)
+		EVP_PKEY_free(ctx->pkey);
+	if (ctx->peerkey)
+		EVP_PKEY_free(ctx->peerkey);
+#ifndef OPENSSL_NO_ENGINE
+	if(ctx->engine)
+		/* The EVP_PKEY_CTX we used belongs to an ENGINE, release the
+		 * functional reference we held for this reason. */
+		ENGINE_finish(ctx->engine);
+#endif
+	OPENSSL_free(ctx);
+	}
+
+int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
+				int cmd, int p1, void *p2)
+	{
+	int ret;
+	if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl)
+		{
+		EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
+		return -2;
+		}
+	if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
+		return -1;
+
+	if (ctx->operation == EVP_PKEY_OP_UNDEFINED)
+		{
+		EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
+		return -1;
+		}
+
+	if ((optype != -1) && !(ctx->operation & optype))
+		{
+		EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
+		return -1;
+		}
+
+	ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
+
+	if (ret == -2)
+		EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
+
+	return ret;
+
+	}
+
+int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
+					const char *name, const char *value)
+	{
+	if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str)
+		{
+		EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
+						EVP_R_COMMAND_NOT_SUPPORTED);
+		return -2;
+		}
+	if (!strcmp(name, "digest"))
+		{
+		const EVP_MD *md;
+		if (!value || !(md = EVP_get_digestbyname(value)))
+			{
+			EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
+						EVP_R_INVALID_DIGEST);
+			return 0;
+			}
+		return EVP_PKEY_CTX_set_signature_md(ctx, md);
+		}
+	return ctx->pmeth->ctrl_str(ctx, name, value);
+	}
+
+int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
+	{
+	return ctx->operation;
+	}
+
+void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
+	{
+	ctx->keygen_info = dat;
+	ctx->keygen_info_count = datlen;
+	}
+
+void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
+	{
+	ctx->data = data;
+	}
+
+void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
+	{
+	return ctx->data;
+	}
+
+EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
+	{
+	return ctx->pkey;
+	}
+
+EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
+	{
+	return ctx->peerkey;
+	}
+	
+void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
+	{
+	ctx->app_data = data;
+	}
+
+void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
+	{
+	return ctx->app_data;
+	}
+
+void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
+	int (*init)(EVP_PKEY_CTX *ctx))
+	{
+	pmeth->init = init;
+	}
+
+void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
+	int (*copy)(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src))
+	{
+	pmeth->copy = copy;
+	}
+
+void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
+	void (*cleanup)(EVP_PKEY_CTX *ctx))
+	{
+	pmeth->cleanup = cleanup;
+	}
+
+void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
+	int (*paramgen_init)(EVP_PKEY_CTX *ctx),
+	int (*paramgen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
+	{
+	pmeth->paramgen_init = paramgen_init;
+	pmeth->paramgen = paramgen;
+	}
+
+void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
+	int (*keygen_init)(EVP_PKEY_CTX *ctx),
+	int (*keygen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
+	{
+	pmeth->keygen_init = keygen_init;
+	pmeth->keygen = keygen;
+	}
+
+void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
+	int (*sign_init)(EVP_PKEY_CTX *ctx),
+	int (*sign)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
+					const unsigned char *tbs, size_t tbslen))
+	{
+	pmeth->sign_init = sign_init;
+	pmeth->sign = sign;
+	}
+
+void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
+	int (*verify_init)(EVP_PKEY_CTX *ctx),
+	int (*verify)(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen,
+					const unsigned char *tbs, size_t tbslen))
+	{
+	pmeth->verify_init = verify_init;
+	pmeth->verify = verify;
+	}
+
+void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
+	int (*verify_recover_init)(EVP_PKEY_CTX *ctx),
+	int (*verify_recover)(EVP_PKEY_CTX *ctx,
+					unsigned char *sig, size_t *siglen,
+					const unsigned char *tbs, size_t tbslen))
+	{
+	pmeth->verify_recover_init = verify_recover_init;
+	pmeth->verify_recover = verify_recover;
+	}
+
+void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
+	int (*signctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
+	int (*signctx)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
+					EVP_MD_CTX *mctx))
+	{
+	pmeth->signctx_init = signctx_init;
+	pmeth->signctx = signctx;
+	}
+
+void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
+	int (*verifyctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
+	int (*verifyctx)(EVP_PKEY_CTX *ctx, const unsigned char *sig,int siglen,
+					EVP_MD_CTX *mctx))
+	{
+	pmeth->verifyctx_init = verifyctx_init;
+	pmeth->verifyctx = verifyctx;
+	}
+
+void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
+	int (*encrypt_init)(EVP_PKEY_CTX *ctx),
+	int (*encryptfn)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
+					const unsigned char *in, size_t inlen))
+	{
+	pmeth->encrypt_init = encrypt_init;
+	pmeth->encrypt = encryptfn;
+	}
+
+void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
+	int (*decrypt_init)(EVP_PKEY_CTX *ctx),
+	int (*decrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
+					const unsigned char *in, size_t inlen))
+	{
+	pmeth->decrypt_init = decrypt_init;
+	pmeth->decrypt = decrypt;
+	}
+
+void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
+	int (*derive_init)(EVP_PKEY_CTX *ctx),
+	int (*derive)(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen))
+	{
+	pmeth->derive_init = derive_init;
+	pmeth->derive = derive;
+	}
+
+void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
+	int (*ctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2),
+	int (*ctrl_str)(EVP_PKEY_CTX *ctx, const char *type, const char *value))
+	{
+	pmeth->ctrl = ctrl;
+	pmeth->ctrl_str = ctrl_str;
+	}