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| 1 /* Simple S/MIME encrypt 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; |
| 9 X509 *rcert = NULL; |
| 10 STACK_OF(X509) *recips = NULL; |
| 11 CMS_ContentInfo *cms = NULL; |
| 12 int ret = 1; |
| 13 |
| 14 /* |
| 15 * On OpenSSL 1.0.0 and later only: |
| 16 * for streaming set CMS_STREAM |
| 17 */ |
| 18 int flags = CMS_STREAM; |
| 19 |
| 20 OpenSSL_add_all_algorithms(); |
| 21 ERR_load_crypto_strings(); |
| 22 |
| 23 /* Read in recipient certificate */ |
| 24 tbio = BIO_new_file("signer.pem", "r"); |
| 25 |
| 26 if (!tbio) |
| 27 goto err; |
| 28 |
| 29 rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL); |
| 30 |
| 31 if (!rcert) |
| 32 goto err; |
| 33 |
| 34 /* Create recipient STACK and add recipient cert to it */ |
| 35 recips = sk_X509_new_null(); |
| 36 |
| 37 if (!recips || !sk_X509_push(recips, rcert)) |
| 38 goto err; |
| 39 |
| 40 /* sk_X509_pop_free will free up recipient STACK and its contents |
| 41 * so set rcert to NULL so it isn't freed up twice. |
| 42 */ |
| 43 rcert = NULL; |
| 44 |
| 45 /* Open content being encrypted */ |
| 46 |
| 47 in = BIO_new_file("encr.txt", "r"); |
| 48 |
| 49 if (!in) |
| 50 goto err; |
| 51 |
| 52 /* encrypt content */ |
| 53 cms = CMS_encrypt(recips, in, EVP_des_ede3_cbc(), flags); |
| 54 |
| 55 if (!cms) |
| 56 goto err; |
| 57 |
| 58 out = BIO_new_file("smencr.txt", "w"); |
| 59 if (!out) |
| 60 goto err; |
| 61 |
| 62 /* Write out S/MIME message */ |
| 63 if (!SMIME_write_CMS(out, cms, in, flags)) |
| 64 goto err; |
| 65 |
| 66 ret = 0; |
| 67 |
| 68 err: |
| 69 |
| 70 if (ret) |
| 71 { |
| 72 fprintf(stderr, "Error Encrypting Data\n"); |
| 73 ERR_print_errors_fp(stderr); |
| 74 } |
| 75 |
| 76 if (cms) |
| 77 CMS_ContentInfo_free(cms); |
| 78 if (rcert) |
| 79 X509_free(rcert); |
| 80 if (recips) |
| 81 sk_X509_pop_free(recips, X509_free); |
| 82 |
| 83 if (in) |
| 84 BIO_free(in); |
| 85 if (out) |
| 86 BIO_free(out); |
| 87 if (tbio) |
| 88 BIO_free(tbio); |
| 89 |
| 90 return ret; |
| 91 |
| 92 } |
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