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#include <stdio.h>
#include "asn1.h"
#include "bio.h"
#include "x509.h"
#include "pem.h"
int verify_callback(int ok, X509_STORE_CTX *ctx);
BIO *bio_err=NULL;
main(argc,argv)
int argc;
char *argv[];
{
X509 *x509,*x;
PKCS7 *p7;
PKCS7_SIGNED *s;
PKCS7_SIGNER_INFO *si;
PKCS7_ISSUER_AND_SERIAL *ias;
X509_STORE_CTX cert_ctx;
X509_STORE *cert_store=NULL;
X509_LOOKUP *lookup=NULL;
BIO *data,*detached=NULL,*p7bio=NULL;
char buf[1024*4];
unsigned char *p,*pp;
int i,j,printit=0;
STACK *sk;
bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);
EVP_add_digest(EVP_md2());
EVP_add_digest(EVP_md5());
EVP_add_digest(EVP_sha1());
EVP_add_digest(EVP_mdc2());
data=BIO_new(BIO_s_file());
again:
pp=NULL;
while (argc > 1)
{
argc--;
argv++;
if (strcmp(argv[0],"-p") == 0)
{
printit=1;
}
else if ((strcmp(argv[0],"-d") == 0) && (argc >= 2))
{
detached=BIO_new(BIO_s_file());
if (!BIO_read_filename(detached,argv[1]))
goto err;
argc--;
argv++;
}
else
{
pp=argv[0];
if (!BIO_read_filename(data,argv[0]))
goto err;
}
}
if (pp == NULL)
BIO_set_fp(data,stdin,BIO_NOCLOSE);
/* Load the PKCS7 object from a file */
if ((p7=PEM_read_bio_PKCS7(data,NULL,NULL)) == NULL) goto err;
/* This stuff is being setup for certificate verification.
* When using SSL, it could be replaced with a
* cert_stre=SSL_CTX_get_cert_store(ssl_ctx); */
cert_store=X509_STORE_new();
X509_STORE_set_default_paths(cert_store);
X509_STORE_load_locations(cert_store,NULL,"../../certs");
X509_STORE_set_verify_cb_func(cert_store,verify_callback);
ERR_clear_errors();
/* We need to process the data */
if (PKCS7_get_detached(p7))
{
if (detached == NULL)
{
printf("no data to verify the signature on\n");
exit(1);
}
else
p7bio=PKCS7_dataInit(p7,detached);
}
else
{
p7bio=PKCS7_dataInit(p7,NULL);
}
/* We now have to 'read' from p7bio to calculate digests etc. */
for (;;)
{
i=BIO_read(p7bio,buf,sizeof(buf));
/* print it? */
if (i <= 0) break;
}
/* We can now verify signatures */
sk=PKCS7_get_signer_info(p7);
if (sk == NULL)
{
printf("there are no signatures on this data\n");
exit(1);
}
/* Ok, first we need to, for each subject entry, see if we can verify */
for (i=0; i<sk_num(sk); i++)
{
si=(PKCS7_SIGNER_INFO *)sk_value(sk,i);
i=PKCS7_dataVerify(cert_store,&cert_ctx,p7bio,p7,si);
if (i <= 0)
goto err;
}
X509_STORE_free(cert_store);
printf("done\n");
exit(0);
err:
ERR_load_crypto_strings();
ERR_print_errors_fp(stderr);
exit(1);
}
/* should be X509 * but we can just have them as char *. */
int verify_callback(ok, ctx)
int ok;
X509_STORE_CTX *ctx;
{
char buf[256];
X509 *err_cert;
int err,depth;
err_cert=X509_STORE_CTX_get_current_cert(ctx);
err= X509_STORE_CTX_get_error(ctx);
depth= X509_STORE_CTX_get_error_depth(ctx);
X509_NAME_oneline(X509_get_subject_name(err_cert),buf,256);
BIO_printf(bio_err,"depth=%d %s\n",depth,buf);
if (!ok)
{
BIO_printf(bio_err,"verify error:num=%d:%s\n",err,
X509_verify_cert_error_string(err));
if (depth < 6)
{
ok=1;
X509_STORE_CTX_set_error(ctx,X509_V_OK);
}
else
{
ok=0;
X509_STORE_CTX_set_error(ctx,X509_V_ERR_CERT_CHAIN_TOO_LONG);
}
}
switch (ctx->error)
{
case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert),buf,256);
BIO_printf(bio_err,"issuer= %s\n",buf);
break;
case X509_V_ERR_CERT_NOT_YET_VALID:
case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
BIO_printf(bio_err,"notBefore=");
ASN1_UTCTIME_print(bio_err,X509_get_notBefore(ctx->current_cert));
BIO_printf(bio_err,"\n");
break;
case X509_V_ERR_CERT_HAS_EXPIRED:
case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
BIO_printf(bio_err,"notAfter=");
ASN1_UTCTIME_print(bio_err,X509_get_notAfter(ctx->current_cert));
BIO_printf(bio_err,"\n");
break;
}
BIO_printf(bio_err,"verify return:%d\n",ok);
return(ok);
}
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