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| 1 /* Simple S/MIME verification 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, *tbio = NULL, *cont = NULL; |
| 9 X509_STORE *st = NULL; |
| 10 X509 *cacert = NULL; |
| 11 CMS_ContentInfo *cms = NULL; |
| 12 |
| 13 int ret = 1; |
| 14 |
| 15 OpenSSL_add_all_algorithms(); |
| 16 ERR_load_crypto_strings(); |
| 17 |
| 18 /* Set up trusted CA certificate store */ |
| 19 |
| 20 st = X509_STORE_new(); |
| 21 |
| 22 /* Read in CA certificate */ |
| 23 tbio = BIO_new_file("cacert.pem", "r"); |
| 24 |
| 25 if (!tbio) |
| 26 goto err; |
| 27 |
| 28 cacert = PEM_read_bio_X509(tbio, NULL, 0, NULL); |
| 29 |
| 30 if (!cacert) |
| 31 goto err; |
| 32 |
| 33 if (!X509_STORE_add_cert(st, cacert)) |
| 34 goto err; |
| 35 |
| 36 /* Open message being verified */ |
| 37 |
| 38 in = BIO_new_file("smout.txt", "r"); |
| 39 |
| 40 if (!in) |
| 41 goto err; |
| 42 |
| 43 /* parse message */ |
| 44 cms = SMIME_read_CMS(in, &cont); |
| 45 |
| 46 if (!cms) |
| 47 goto err; |
| 48 |
| 49 /* File to output verified content to */ |
| 50 out = BIO_new_file("smver.txt", "w"); |
| 51 if (!out) |
| 52 goto err; |
| 53 |
| 54 if (!CMS_verify(cms, NULL, st, cont, out, 0)) |
| 55 { |
| 56 fprintf(stderr, "Verification Failure\n"); |
| 57 goto err; |
| 58 } |
| 59 |
| 60 fprintf(stderr, "Verification Successful\n"); |
| 61 |
| 62 ret = 0; |
| 63 |
| 64 err: |
| 65 |
| 66 if (ret) |
| 67 { |
| 68 fprintf(stderr, "Error Verifying Data\n"); |
| 69 ERR_print_errors_fp(stderr); |
| 70 } |
| 71 |
| 72 if (cms) |
| 73 CMS_ContentInfo_free(cms); |
| 74 |
| 75 if (cacert) |
| 76 X509_free(cacert); |
| 77 |
| 78 if (in) |
| 79 BIO_free(in); |
| 80 if (out) |
| 81 BIO_free(out); |
| 82 if (tbio) |
| 83 BIO_free(tbio); |
| 84 |
| 85 return ret; |
| 86 |
| 87 } |
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