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88 lines
1.7 KiB
88 lines
1.7 KiB
/* Simple S/MIME signing example */ |
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#include <openssl/pem.h> |
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#include <openssl/pkcs7.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; |
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EVP_PKEY *skey = NULL; |
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PKCS7 *p7 = NULL; |
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int ret = 1; |
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/* |
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* For simple S/MIME signing use PKCS7_DETACHED. On OpenSSL 0.9.9 only: |
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* for streaming detached set PKCS7_DETACHED|PKCS7_STREAM for streaming |
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* non-detached set PKCS7_STREAM |
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*/ |
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int flags = PKCS7_DETACHED | PKCS7_STREAM; |
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OpenSSL_add_all_algorithms(); |
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ERR_load_crypto_strings(); |
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/* Read in signer certificate and private key */ |
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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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if (!scert || !skey) |
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goto err; |
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/* Open content being signed */ |
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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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/* Sign content */ |
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p7 = PKCS7_sign(scert, skey, NULL, in, flags); |
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if (!p7) |
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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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if (!(flags & PKCS7_STREAM)) |
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BIO_reset(in); |
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/* Write out S/MIME message */ |
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if (!SMIME_write_PKCS7(out, p7, in, flags)) |
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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 (p7) |
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PKCS7_free(p7); |
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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 (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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