crypto/x509/a_sign.c - boringssl - Git at Google

 /* 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.] */

 #include <openssl/asn1.h>
 #include <openssl/digest.h>
 #include <openssl/err.h>
 #include <openssl/evp.h>
 #include <openssl/mem.h>
 #include <openssl/obj.h>
 #include <openssl/x509.h>

 #include "../evp/internal.h"


 /* TODO(fork): this code appears to be dead. */
 #if 0
 #ifndef NO_ASN1_OLD

 int ASN1_sign(i2d_of_void *i2d, X509_ALGOR *algor1, X509_ALGOR *algor2,
 	      ASN1_BIT_STRING *signature, char *data, EVP_PKEY *pkey,
 	      const EVP_MD *type)
 	{
 	EVP_MD_CTX ctx;
 	unsigned char *p,*buf_in=NULL,*buf_out=NULL;
 	int i,inl=0,outl=0,outll=0;
 	X509_ALGOR *a;

 	EVP_MD_CTX_init(&ctx);
 	for (i=0; i<2; i++)
 		{
 		if (i == 0)
 			a=algor1;
 		else
 			a=algor2;
 		if (a == NULL) continue;
                 if (type->pkey_type == NID_dsaWithSHA1)
 			{
 			/* special case: RFC 2459 tells us to omit 'parameters'
 			 * with id-dsa-with-sha1 */
 			ASN1_TYPE_free(a->parameter);
 			a->parameter = NULL;
 			}
 		else if ((a->parameter == NULL) ||
 			(a->parameter->type != V_ASN1_NULL))
 			{
 			ASN1_TYPE_free(a->parameter);
 			if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err;
 			a->parameter->type=V_ASN1_NULL;
 			}
 		ASN1_OBJECT_free(a->algorithm);
 		a->algorithm=OBJ_nid2obj(type->pkey_type);
 		if (a->algorithm == NULL)
 			{
 			OPENSSL_PUT_ERROR(ASN1, XXX, ASN1_R_UNKNOWN_OBJECT_TYPE);
 			goto err;
 			}
 		if (a->algorithm->length == 0)
 			{
 			OPENSSL_PUT_ERROR(ASN1, XXX, ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
 			goto err;
 			}
 		}
 	inl=i2d(data,NULL);
 	buf_in=(unsigned char *)OPENSSL_malloc((unsigned int)inl);
 	outll=outl=EVP_PKEY_size(pkey);
 	buf_out=(unsigned char *)OPENSSL_malloc((unsigned int)outl);
 	if ((buf_in == NULL) || (buf_out == NULL))
 		{
 		outl=0;
 		OPENSSL_PUT_ERROR(ASN1, XXX, ERR_R_MALLOC_FAILURE);
 		goto err;
 		}
 	p=buf_in;

 	i2d(data,&p);
 	if (!EVP_SignInit_ex(&ctx,type, NULL)
 		|| !EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl)
 		|| !EVP_SignFinal(&ctx,(unsigned char *)buf_out,
 			(unsigned int *)&outl,pkey))
 		{
 		outl=0;
 		OPENSSL_PUT_ERROR(ASN1, XXX, ERR_R_EVP_LIB);
 		goto err;
 		}
 	if (signature->data != NULL) OPENSSL_free(signature->data);
 	signature->data=buf_out;
 	buf_out=NULL;
 	signature->length=outl;
 	/* In the interests of compatibility, I'll make sure that
 	 * the bit string has a 'not-used bits' value of 0
 	 */
 	signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
 	signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
 err:
 	EVP_MD_CTX_cleanup(&ctx);
 	if (buf_in != NULL)
 		{ OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); }
 	if (buf_out != NULL)
 		{ OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); }
 	return(outl);
 	}

 #endif
 #endif

 int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, X509_ALGOR *algor2,
 	     ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey,
 	     const EVP_MD *type)
 	{
 	EVP_MD_CTX ctx;
 	EVP_MD_CTX_init(&ctx);
 	if (!EVP_DigestSignInit(&ctx, NULL, type, NULL, pkey))
 		{
 		EVP_MD_CTX_cleanup(&ctx);
 		return 0;
 		}
 	return ASN1_item_sign_ctx(it, algor1, algor2, signature, asn, &ctx);
 	}


 int ASN1_item_sign_ctx(const ASN1_ITEM *it,
 		X509_ALGOR *algor1, X509_ALGOR *algor2,
 	     	ASN1_BIT_STRING *signature, void *asn, EVP_MD_CTX *ctx)
 	{
 	const EVP_MD *type;
 	EVP_PKEY *pkey;
 	unsigned char *buf_in=NULL,*buf_out=NULL;
 	size_t inl=0,outl=0,outll=0;
 	int signid, paramtype;
 	int rv;

 	type = EVP_MD_CTX_md(ctx);
 	pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx);

 	if (!type || !pkey)
 		{
 		OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, X509_R_CONTEXT_NOT_INITIALISED);
 		return 0;
 		}

 	if (pkey->ameth->item_sign)
 		{
 		rv = pkey->ameth->item_sign(ctx, it, asn, algor1, algor2,
 						signature);
 		if (rv == 1)
 			outl = signature->length;
 		/* Return value meanings:
 		 * <=0: error.
 		 *   1: method does everything.
 		 *   2: carry on as normal.
 		 *   3: ASN1 method sets algorithm identifiers: just sign.
 		 */
 		if (rv <= 0)
 			OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, ERR_R_EVP_LIB);
 		if (rv <= 1)
 			goto err;
 		}
 	else
 		rv = 2;

 	if (rv == 2)
 		{
 		/* TODO(fork): EVP_MD_FLAG_PKEY_METHOD_SIGNATURE seems to mean
 		 * "is SHA". */
 		if (!pkey->ameth ||
 			!OBJ_find_sigid_by_algs(&signid,
 						EVP_MD_type(type),
 						pkey->ameth->pkey_id))
 			{
 			OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, X509_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED);
 			return 0;
 			}

 		if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL)
 			paramtype = V_ASN1_NULL;
 		else
 			paramtype = V_ASN1_UNDEF;

 		if (algor1)
 			X509_ALGOR_set0(algor1, OBJ_nid2obj(signid), paramtype, NULL);
 		if (algor2)
 			X509_ALGOR_set0(algor2, OBJ_nid2obj(signid), paramtype, NULL);

 		}

 	inl=ASN1_item_i2d(asn,&buf_in, it);
 	outll=outl=EVP_PKEY_size(pkey);
 	buf_out=OPENSSL_malloc((unsigned int)outl);
 	if ((buf_in == NULL) || (buf_out == NULL))
 		{
 		outl=0;
 		OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, ERR_R_MALLOC_FAILURE);
 		goto err;
 		}

 	if (!EVP_DigestSignUpdate(ctx, buf_in, inl)
 		|| !EVP_DigestSignFinal(ctx, buf_out, &outl))
 		{
 		outl=0;
 		OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, ERR_R_EVP_LIB);
 		goto err;
 		}
 	if (signature->data != NULL) OPENSSL_free(signature->data);
 	signature->data=buf_out;
 	buf_out=NULL;
 	signature->length=outl;
 	/* In the interests of compatibility, I'll make sure that
 	 * the bit string has a 'not-used bits' value of 0
 	 */
 	signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
 	signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
 err:
 	EVP_MD_CTX_cleanup(ctx);
 	if (buf_in != NULL)
 		{ OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); }
 	if (buf_out != NULL)
 		{ OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); }
 	return(outl);
 	}
	/* 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.] */

	#include <openssl/asn1.h>
	#include <openssl/digest.h>
	#include <openssl/err.h>
	#include <openssl/evp.h>
	#include <openssl/mem.h>
	#include <openssl/obj.h>
	#include <openssl/x509.h>

	#include "../evp/internal.h"


	/* TODO(fork): this code appears to be dead. */
	#if 0
	#ifndef NO_ASN1_OLD

	int ASN1_sign(i2d_of_void i2d, X509_ALGOR algor1, X509_ALGOR *algor2,
	ASN1_BIT_STRING signature, char data, EVP_PKEY *pkey,
	const EVP_MD *type)
	{
	EVP_MD_CTX ctx;
	unsigned char p,buf_in=NULL,*buf_out=NULL;
	int i,inl=0,outl=0,outll=0;
	X509_ALGOR *a;

	EVP_MD_CTX_init(&ctx);
	for (i=0; i<2; i++)
	{
	if (i == 0)
	a=algor1;
	else
	a=algor2;
	if (a == NULL) continue;
	if (type->pkey_type == NID_dsaWithSHA1)
	{
	/* special case: RFC 2459 tells us to omit 'parameters'
	* with id-dsa-with-sha1 */
	ASN1_TYPE_free(a->parameter);
	a->parameter = NULL;
	}
	else if ((a->parameter == NULL) \|\|
	(a->parameter->type != V_ASN1_NULL))
	{
	ASN1_TYPE_free(a->parameter);
	if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err;
	a->parameter->type=V_ASN1_NULL;
	}
	ASN1_OBJECT_free(a->algorithm);
	a->algorithm=OBJ_nid2obj(type->pkey_type);
	if (a->algorithm == NULL)
	{
	OPENSSL_PUT_ERROR(ASN1, XXX, ASN1_R_UNKNOWN_OBJECT_TYPE);
	goto err;
	}
	if (a->algorithm->length == 0)
	{
	OPENSSL_PUT_ERROR(ASN1, XXX, ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
	goto err;
	}
	}
	inl=i2d(data,NULL);
	buf_in=(unsigned char *)OPENSSL_malloc((unsigned int)inl);
	outll=outl=EVP_PKEY_size(pkey);
	buf_out=(unsigned char *)OPENSSL_malloc((unsigned int)outl);
	if ((buf_in == NULL) \|\| (buf_out == NULL))
	{
	outl=0;
	OPENSSL_PUT_ERROR(ASN1, XXX, ERR_R_MALLOC_FAILURE);
	goto err;
	}
	p=buf_in;

	i2d(data,&p);
	if (!EVP_SignInit_ex(&ctx,type, NULL)
	\|\| !EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl)
	\|\| !EVP_SignFinal(&ctx,(unsigned char *)buf_out,
	(unsigned int *)&outl,pkey))
	{
	outl=0;
	OPENSSL_PUT_ERROR(ASN1, XXX, ERR_R_EVP_LIB);
	goto err;
	}
	if (signature->data != NULL) OPENSSL_free(signature->data);
	signature->data=buf_out;
	buf_out=NULL;
	signature->length=outl;
	/* In the interests of compatibility, I'll make sure that
	* the bit string has a 'not-used bits' value of 0
	*/
	signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT\|0x07);
	signature->flags\|=ASN1_STRING_FLAG_BITS_LEFT;
	err:
	EVP_MD_CTX_cleanup(&ctx);
	if (buf_in != NULL)
	{ OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); }
	if (buf_out != NULL)
	{ OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); }
	return(outl);
	}

	#endif
	#endif

	int ASN1_item_sign(const ASN1_ITEM it, X509_ALGOR algor1, X509_ALGOR *algor2,
	ASN1_BIT_STRING signature, void asn, EVP_PKEY *pkey,
	const EVP_MD *type)
	{
	EVP_MD_CTX ctx;
	EVP_MD_CTX_init(&ctx);
	if (!EVP_DigestSignInit(&ctx, NULL, type, NULL, pkey))
	{
	EVP_MD_CTX_cleanup(&ctx);
	return 0;
	}
	return ASN1_item_sign_ctx(it, algor1, algor2, signature, asn, &ctx);
	}


	int ASN1_item_sign_ctx(const ASN1_ITEM *it,
	X509_ALGOR algor1, X509_ALGOR algor2,
	ASN1_BIT_STRING signature, void asn, EVP_MD_CTX *ctx)
	{
	const EVP_MD *type;
	EVP_PKEY *pkey;
	unsigned char buf_in=NULL,buf_out=NULL;
	size_t inl=0,outl=0,outll=0;
	int signid, paramtype;
	int rv;

	type = EVP_MD_CTX_md(ctx);
	pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx);

	if (!type \|\| !pkey)
	{
	OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, X509_R_CONTEXT_NOT_INITIALISED);
	return 0;
	}

	if (pkey->ameth->item_sign)
	{
	rv = pkey->ameth->item_sign(ctx, it, asn, algor1, algor2,
	signature);
	if (rv == 1)
	outl = signature->length;
	/* Return value meanings:
	* <=0: error.
	* 1: method does everything.
	* 2: carry on as normal.
	* 3: ASN1 method sets algorithm identifiers: just sign.
	*/
	if (rv <= 0)
	OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, ERR_R_EVP_LIB);
	if (rv <= 1)
	goto err;
	}
	else
	rv = 2;

	if (rv == 2)
	{
	/* TODO(fork): EVP_MD_FLAG_PKEY_METHOD_SIGNATURE seems to mean
	* "is SHA". */
	if (!pkey->ameth \|\|
	!OBJ_find_sigid_by_algs(&signid,
	EVP_MD_type(type),
	pkey->ameth->pkey_id))
	{
	OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, X509_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED);
	return 0;
	}

	if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL)
	paramtype = V_ASN1_NULL;
	else
	paramtype = V_ASN1_UNDEF;

	if (algor1)
	X509_ALGOR_set0(algor1, OBJ_nid2obj(signid), paramtype, NULL);
	if (algor2)
	X509_ALGOR_set0(algor2, OBJ_nid2obj(signid), paramtype, NULL);

	}

	inl=ASN1_item_i2d(asn,&buf_in, it);
	outll=outl=EVP_PKEY_size(pkey);
	buf_out=OPENSSL_malloc((unsigned int)outl);
	if ((buf_in == NULL) \|\| (buf_out == NULL))
	{
	outl=0;
	OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, ERR_R_MALLOC_FAILURE);
	goto err;
	}

	if (!EVP_DigestSignUpdate(ctx, buf_in, inl)
	\|\| !EVP_DigestSignFinal(ctx, buf_out, &outl))
	{
	outl=0;
	OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, ERR_R_EVP_LIB);
	goto err;
	}
	if (signature->data != NULL) OPENSSL_free(signature->data);
	signature->data=buf_out;
	buf_out=NULL;
	signature->length=outl;
	/* In the interests of compatibility, I'll make sure that
	* the bit string has a 'not-used bits' value of 0
	*/
	signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT\|0x07);
	signature->flags\|=ASN1_STRING_FLAG_BITS_LEFT;
	err:
	EVP_MD_CTX_cleanup(ctx);
	if (buf_in != NULL)
	{ OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); }
	if (buf_out != NULL)
	{ OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); }
	return(outl);
	}