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| 1 /* Simple S/MIME compress example */ |
| 2 #include <openssl/pem.h> |
| 3 #include <openssl/cms.h> |
| 4 #include <openssl/err.h> |
| 5 |
| 6 int main(int argc, char **argv) |
| 7 { |
| 8 BIO *in = NULL, *out = NULL; |
| 9 CMS_ContentInfo *cms = NULL; |
| 10 int ret = 1; |
| 11 |
| 12 /* |
| 13 * On OpenSSL 0.9.9 only: |
| 14 * for streaming set CMS_STREAM |
| 15 */ |
| 16 int flags = CMS_STREAM; |
| 17 |
| 18 OpenSSL_add_all_algorithms(); |
| 19 ERR_load_crypto_strings(); |
| 20 |
| 21 /* Open content being compressed */ |
| 22 |
| 23 in = BIO_new_file("comp.txt", "r"); |
| 24 |
| 25 if (!in) |
| 26 goto err; |
| 27 |
| 28 /* compress content */ |
| 29 cms = CMS_compress(in, NID_zlib_compression, flags); |
| 30 |
| 31 if (!cms) |
| 32 goto err; |
| 33 |
| 34 out = BIO_new_file("smcomp.txt", "w"); |
| 35 if (!out) |
| 36 goto err; |
| 37 |
| 38 /* Write out S/MIME message */ |
| 39 if (!SMIME_write_CMS(out, cms, in, flags)) |
| 40 goto err; |
| 41 |
| 42 ret = 0; |
| 43 |
| 44 err: |
| 45 |
| 46 if (ret) |
| 47 { |
| 48 fprintf(stderr, "Error Compressing Data\n"); |
| 49 ERR_print_errors_fp(stderr); |
| 50 } |
| 51 |
| 52 if (cms) |
| 53 CMS_ContentInfo_free(cms); |
| 54 if (in) |
| 55 BIO_free(in); |
| 56 if (out) |
| 57 BIO_free(out); |
| 58 |
| 59 return ret; |
| 60 |
| 61 } |
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