| /* 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 <openssl/opensslconf.h> /* for OPENSSL_NO_RSA */ |
| #ifndef OPENSSL_NO_RSA |
| #include <stdio.h> |
| #include "cryptlib.h" |
| #include <openssl/evp.h> |
| #include <openssl/rand.h> |
| #include <openssl/objects.h> |
| #include <openssl/x509.h> |
| #include <openssl/pem.h> |
| #include <openssl/rsa.h> |
| |
| int PEM_SealInit(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 *)OPENSSL_malloc(max*2); |
| if (s == NULL) |
| { |
| PEMerr(PEM_F_PEM_SEALINIT,ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| |
| EVP_EncodeInit(&ctx->encode); |
| |
| EVP_MD_CTX_init(&ctx->md); |
| EVP_SignInit(&ctx->md,md_type); |
| |
| EVP_CIPHER_CTX_init(&ctx->cipher); |
| ret=EVP_SealInit(&ctx->cipher,type,ek,ekl,iv,pubk,npubk); |
| if (ret <= 0) 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) OPENSSL_free(s); |
| OPENSSL_cleanse(key,EVP_MAX_KEY_LENGTH); |
| return(ret); |
| } |
| |
| void PEM_SealUpdate(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(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 *)OPENSSL_malloc(i*2); |
| if (s == NULL) |
| { |
| PEMerr(PEM_F_PEM_SEALFINAL,ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| |
| EVP_EncryptFinal_ex(&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: |
| EVP_MD_CTX_cleanup(&ctx->md); |
| EVP_CIPHER_CTX_cleanup(&ctx->cipher); |
| if (s != NULL) OPENSSL_free(s); |
| return(ret); |
| } |
| #else /* !OPENSSL_NO_RSA */ |
| |
| # if PEDANTIC |
| static void *dummy=&dummy; |
| # endif |
| |
| #endif |