[thirdparty/openssl.git] / crypto / pem / pem_seal.c

/* crypto/pem/pem_seal.c */
/* 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 <stdio.h>
#include "cryptlib.h"
#include "evp.h"
#include "rand.h"
#include "objects.h"
#include "x509.h"
#include "pem.h"

int PEM_SealInit(ctx,type,md_type,ek,ekl,iv,pubk,npubk)
PEM_ENCODE_SEAL_CTX *ctx;
EVP_CIPHER *type;
EVP_MD *md_type;
unsigned char **ek;
int *ekl;
unsigned char *iv;
EVP_PKEY **pubk;
int npubk;
	{
	unsigned char key[EVP_MAX_KEY_LENGTH];
	int ret= -1;
	int i,j,max=0;
	char *s=NULL;

	for (i=0; i<npubk; i++)
		{
		if (pubk[i]->type != EVP_PKEY_RSA)
			{
			PEMerr(PEM_F_PEM_SEALINIT,PEM_R_PUBLIC_KEY_NO_RSA);
			goto err;
			}
		j=RSA_size(pubk[i]->pkey.rsa);
		if (j > max) max=j;
		}
	s=(char *)Malloc(max*2);
	if (s == NULL)
		{
		PEMerr(PEM_F_PEM_SEALINIT,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	EVP_EncodeInit(&(ctx->encode));
	EVP_SignInit(&(ctx->md),md_type);

	ret=EVP_SealInit(&(ctx->cipher),type,ek,ekl,iv,pubk,npubk);
	if (!ret) goto err;

	/* base64 encode the keys */
	for (i=0; i<npubk; i++)
		{
		j=EVP_EncodeBlock((unsigned char *)s,ek[i],
			RSA_size(pubk[i]->pkey.rsa));
		ekl[i]=j;
		memcpy(ek[i],s,j+1);
		}

	ret=npubk;
err:
	if (s != NULL) Free(s);
	memset(key,0,EVP_MAX_KEY_LENGTH);
	return(ret);
	}

void PEM_SealUpdate(ctx,out,outl,in,inl)
PEM_ENCODE_SEAL_CTX *ctx;
unsigned char *out;
int *outl;
unsigned char *in;
int inl;
	{
	unsigned char buffer[1600];
	int i,j;

	*outl=0;
	EVP_SignUpdate(&(ctx->md),in,inl);
	for (;;)
		{
		if (inl <= 0) break;
		if (inl > 1200)
			i=1200;
		else
			i=inl;
		EVP_EncryptUpdate(&(ctx->cipher),buffer,&j,in,i);
		EVP_EncodeUpdate(&(ctx->encode),out,&j,buffer,j);
		*outl+=j;
		out+=j;
		in+=i;
		inl-=i;
		}
	}

int PEM_SealFinal(ctx,sig,sigl,out,outl,priv)
PEM_ENCODE_SEAL_CTX *ctx;
unsigned char *sig;
int *sigl;
unsigned char *out;
int *outl;
EVP_PKEY *priv;
	{
	unsigned char *s=NULL;
	int ret=0,j;
	unsigned int i;

	if (priv->type != EVP_PKEY_RSA)
		{
		PEMerr(PEM_F_PEM_SEALFINAL,PEM_R_PUBLIC_KEY_NO_RSA);
		goto err;
		}
	i=RSA_size(priv->pkey.rsa);
	if (i < 100) i=100;
	s=(unsigned char *)Malloc(i*2);
	if (s == NULL)
		{
		PEMerr(PEM_F_PEM_SEALFINAL,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	EVP_EncryptFinal(&(ctx->cipher),s,(int *)&i);
	EVP_EncodeUpdate(&(ctx->encode),out,&j,s,i);
	*outl=j;
	out+=j;
	EVP_EncodeFinal(&(ctx->encode),out,&j);
	*outl+=j;

	if (!EVP_SignFinal(&(ctx->md),s,&i,priv)) goto err;
	*sigl=EVP_EncodeBlock(sig,s,i);

	ret=1;
err:
	memset((char *)&(ctx->md),0,sizeof(ctx->md));
	memset((char *)&(ctx->cipher),0,sizeof(ctx->cipher));
	if (s != NULL) Free(s);
	return(ret);
	}
Commit	Line	Data
d02b48c6	1	/* crypto/pem/pem_seal.c */
58964a49	2	/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
d02b48c6 RE	3	* All rights reserved.
	4	*
	5	* This package is an SSL implementation written
	6	* by Eric Young (eay@cryptsoft.com).
	7	* The implementation was written so as to conform with Netscapes SSL.
	8	*
	9	* This library is free for commercial and non-commercial use as long as
	10	* the following conditions are aheared to. The following conditions
	11	* apply to all code found in this distribution, be it the RC4, RSA,
	12	* lhash, DES, etc., code; not just the SSL code. The SSL documentation
	13	* included with this distribution is covered by the same copyright terms
	14	* except that the holder is Tim Hudson (tjh@cryptsoft.com).
	15	*
	16	* Copyright remains Eric Young's, and as such any Copyright notices in
	17	* the code are not to be removed.
	18	* If this package is used in a product, Eric Young should be given attribution
	19	* as the author of the parts of the library used.
	20	* This can be in the form of a textual message at program startup or
	21	* in documentation (online or textual) provided with the package.
	22	*
	23	* Redistribution and use in source and binary forms, with or without
	24	* modification, are permitted provided that the following conditions
	25	* are met:
	26	* 1. Redistributions of source code must retain the copyright
	27	* notice, this list of conditions and the following disclaimer.
	28	* 2. Redistributions in binary form must reproduce the above copyright
	29	* notice, this list of conditions and the following disclaimer in the
	30	* documentation and/or other materials provided with the distribution.
	31	* 3. All advertising materials mentioning features or use of this software
	32	* must display the following acknowledgement:
	33	* "This product includes cryptographic software written by
	34	* Eric Young (eay@cryptsoft.com)"
	35	* The word 'cryptographic' can be left out if the rouines from the library
	36	* being used are not cryptographic related :-).
	37	* 4. If you include any Windows specific code (or a derivative thereof) from
	38	* the apps directory (application code) you must include an acknowledgement:
	39	* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
	40	*
	41	* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
	42	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	43	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	44	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	45	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	46	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	47	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	48	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	49	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	50	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	51	* SUCH DAMAGE.
	52	*
	53	* The licence and distribution terms for any publically available version or
	54	* derivative of this code cannot be changed. i.e. this code cannot simply be
	55	* copied and put under another distribution licence
	56	* [including the GNU Public Licence.]
	57	*/
	58
	59	#include <stdio.h>
	60	#include "cryptlib.h"
	61	#include "evp.h"
	62	#include "rand.h"
	63	#include "objects.h"
	64	#include "x509.h"
	65	#include "pem.h"
	66
67	int PEM_SealInit(ctx,type,md_type,ek,ekl,iv,pubk,npubk)
68	PEM_ENCODE_SEAL_CTX *ctx;
69	EVP_CIPHER *type;
70	EVP_MD *md_type;
71	unsigned char **ek;
72	int *ekl;
73	unsigned char *iv;
74	EVP_PKEY **pubk;
75	int npubk;
76	{
77	unsigned char key[EVP_MAX_KEY_LENGTH];
78	int ret= -1;
79	int i,j,max=0;
80	char *s=NULL;
81
82	for (i=0; i<npubk; i++)
83	{
84	if (pubk[i]->type != EVP_PKEY_RSA)
85	{
86	PEMerr(PEM_F_PEM_SEALINIT,PEM_R_PUBLIC_KEY_NO_RSA);
87	goto err;
88	}
89	j=RSA_size(pubk[i]->pkey.rsa);
90	if (j > max) max=j;
91	}
92	s=(char )Malloc(max2);
93	if (s == NULL)
94	{
95	PEMerr(PEM_F_PEM_SEALINIT,ERR_R_MALLOC_FAILURE);
96	goto err;
97	}
98
99	EVP_EncodeInit(&(ctx->encode));
100	EVP_SignInit(&(ctx->md),md_type);
101
102	ret=EVP_SealInit(&(ctx->cipher),type,ek,ekl,iv,pubk,npubk);
103	if (!ret) goto err;
104
105	/* base64 encode the keys */
106	for (i=0; i<npubk; i++)
107	{
108	j=EVP_EncodeBlock((unsigned char *)s,ek[i],
109	RSA_size(pubk[i]->pkey.rsa));
110	ekl[i]=j;
111	memcpy(ek[i],s,j+1);
112	}
113
114	ret=npubk;
115	err:
116	if (s != NULL) Free(s);
117	memset(key,0,EVP_MAX_KEY_LENGTH);
118	return(ret);
119	}
120
121	void PEM_SealUpdate(ctx,out,outl,in,inl)
122	PEM_ENCODE_SEAL_CTX *ctx;
123	unsigned char *out;
124	int *outl;
125	unsigned char *in;
126	int inl;
127	{
128	unsigned char buffer[1600];
129	int i,j;
130
131	*outl=0;
132	EVP_SignUpdate(&(ctx->md),in,inl);
133	for (;;)
134	{
135	if (inl <= 0) break;
136	if (inl > 1200)
137	i=1200;
138	else
139	i=inl;
140	EVP_EncryptUpdate(&(ctx->cipher),buffer,&j,in,i);
141	EVP_EncodeUpdate(&(ctx->encode),out,&j,buffer,j);
142	*outl+=j;
143	out+=j;
144	in+=i;
145	inl-=i;
146	}
147	}
148
149	int PEM_SealFinal(ctx,sig,sigl,out,outl,priv)
150	PEM_ENCODE_SEAL_CTX *ctx;
151	unsigned char *sig;
152	int *sigl;
153	unsigned char *out;
154	int *outl;
155	EVP_PKEY *priv;
156	{
157	unsigned char *s=NULL;
158	int ret=0,j;
159	unsigned int i;
160
161	if (priv->type != EVP_PKEY_RSA)
162	{
163	PEMerr(PEM_F_PEM_SEALFINAL,PEM_R_PUBLIC_KEY_NO_RSA);
164	goto err;
165	}
166	i=RSA_size(priv->pkey.rsa);
167	if (i < 100) i=100;
168	s=(unsigned char )Malloc(i2);
169	if (s == NULL)
170	{
171	PEMerr(PEM_F_PEM_SEALFINAL,ERR_R_MALLOC_FAILURE);
172	goto err;
173	}
174
175	EVP_EncryptFinal(&(ctx->cipher),s,(int *)&i);
176	EVP_EncodeUpdate(&(ctx->encode),out,&j,s,i);
177	*outl=j;
178	out+=j;
179	EVP_EncodeFinal(&(ctx->encode),out,&j);
180	*outl+=j;
181
182	if (!EVP_SignFinal(&(ctx->md),s,&i,priv)) goto err;
183	*sigl=EVP_EncodeBlock(sig,s,i);
184
185	ret=1;
186	err:
187	memset((char *)&(ctx->md),0,sizeof(ctx->md));
188	memset((char *)&(ctx->cipher),0,sizeof(ctx->cipher));
189	if (s != NULL) Free(s);
190	return(ret);
191	}