103 lines
1.9 KiB
C
103 lines
1.9 KiB
C
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/* S/MIME signing example: 2 signers */
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#include <openssl/pem.h>
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#include <openssl/cms.h>
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#include <openssl/err.h>
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int main(int argc, char **argv)
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{
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BIO *in = NULL, *out = NULL, *tbio = NULL;
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X509 *scert = NULL, *scert2 = NULL;
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EVP_PKEY *skey = NULL, *skey2 = NULL;
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CMS_ContentInfo *cms = NULL;
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int ret = 1;
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OpenSSL_add_all_algorithms();
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ERR_load_crypto_strings();
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tbio = BIO_new_file("signer.pem", "r");
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if (!tbio)
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goto err;
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scert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
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BIO_reset(tbio);
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skey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
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BIO_free(tbio);
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tbio = BIO_new_file("signer2.pem", "r");
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if (!tbio)
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goto err;
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scert2 = PEM_read_bio_X509(tbio, NULL, 0, NULL);
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BIO_reset(tbio);
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skey2 = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
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if (!scert2 || !skey2)
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goto err;
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in = BIO_new_file("sign.txt", "r");
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if (!in)
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goto err;
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cms = CMS_sign(NULL, NULL, NULL, in, CMS_STREAM | CMS_PARTIAL);
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if (!cms)
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goto err;
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/* Add each signer in turn */
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if (!CMS_add1_signer(cms, scert, skey, NULL, 0))
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goto err;
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if (!CMS_add1_signer(cms, scert2, skey2, NULL, 0))
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goto err;
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out = BIO_new_file("smout.txt", "w");
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if (!out)
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goto err;
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/* NB: content included and finalized by SMIME_write_CMS */
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if (!SMIME_write_CMS(out, cms, in, CMS_STREAM))
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goto err;
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ret = 0;
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err:
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if (ret) {
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fprintf(stderr, "Error Signing Data\n");
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ERR_print_errors_fp(stderr);
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}
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if (cms)
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CMS_ContentInfo_free(cms);
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if (scert)
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X509_free(scert);
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if (skey)
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EVP_PKEY_free(skey);
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if (scert2)
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X509_free(scert2);
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if (skey)
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EVP_PKEY_free(skey2);
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if (in)
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BIO_free(in);
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if (out)
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BIO_free(out);
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if (tbio)
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BIO_free(tbio);
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return ret;
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}
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