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Diffstat (limited to 'crypto/pem/pem_seal.c')
| -rw-r--r-- | crypto/pem/pem_seal.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/crypto/pem/pem_seal.c b/crypto/pem/pem_seal.c new file mode 100644 index 000000000000..4e554e5481e0 --- /dev/null +++ b/crypto/pem/pem_seal.c @@ -0,0 +1,189 @@ +/* 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) 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 |