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98 lines
2.0 KiB
98 lines
2.0 KiB
/* |
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* S/MIME detached data encrypt example: rarely done but should the need |
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* arise this is an example.... |
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*/ |
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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, *dout = NULL; |
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X509 *rcert = NULL; |
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STACK_OF(X509) *recips = NULL; |
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CMS_ContentInfo *cms = NULL; |
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int ret = 1; |
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int flags = CMS_STREAM | CMS_DETACHED; |
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OpenSSL_add_all_algorithms(); |
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ERR_load_crypto_strings(); |
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/* Read in recipient certificate */ |
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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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rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL); |
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if (!rcert) |
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goto err; |
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/* Create recipient STACK and add recipient cert to it */ |
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recips = sk_X509_new_null(); |
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if (!recips || !sk_X509_push(recips, rcert)) |
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goto err; |
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/* |
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* sk_X509_pop_free will free up recipient STACK and its contents so set |
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* rcert to NULL so it isn't freed up twice. |
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*/ |
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rcert = NULL; |
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/* Open content being encrypted */ |
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in = BIO_new_file("encr.txt", "r"); |
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dout = BIO_new_file("smencr.out", "wb"); |
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if (!in) |
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goto err; |
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/* encrypt content */ |
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cms = CMS_encrypt(recips, in, EVP_des_ede3_cbc(), flags); |
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if (!cms) |
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goto err; |
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out = BIO_new_file("smencr.pem", "w"); |
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if (!out) |
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goto err; |
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if (!CMS_final(cms, in, dout, flags)) |
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goto err; |
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/* Write out CMS structure without content */ |
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if (!PEM_write_bio_CMS(out, cms)) |
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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 Encrypting 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 (rcert) |
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X509_free(rcert); |
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if (recips) |
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sk_X509_pop_free(recips, X509_free); |
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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 (dout) |
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BIO_free(dout); |
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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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