--- /dev/null
+/* 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);
+ if (!EVP_SignInit(&ctx->md,md_type))
+ goto err;
+
+ 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;
+ }
+
+ if (!EVP_EncryptFinal_ex(&ctx->cipher,s,(int *)&i))
+ goto err;
+ 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
projects / cassiopeia.git / blobdiff