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89 lines
1.7 KiB
89 lines
1.7 KiB
/* |
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* S/MIME detached data decrypt 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, *dcont = NULL; |
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X509 *rcert = NULL; |
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EVP_PKEY *rkey = NULL; |
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CMS_ContentInfo *cms = NULL; |
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int ret = 1; |
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OpenSSL_add_all_algorithms(); |
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ERR_load_crypto_strings(); |
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/* Read in recipient 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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rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL); |
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BIO_reset(tbio); |
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rkey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL); |
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if (!rcert || !rkey) |
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goto err; |
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/* Open PEM file containing enveloped data */ |
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in = BIO_new_file("smencr.pem", "r"); |
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if (!in) |
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goto err; |
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/* Parse PEM content */ |
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cms = PEM_read_bio_CMS(in, NULL, 0, NULL); |
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if (!cms) |
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goto err; |
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/* Open file containing detached content */ |
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dcont = BIO_new_file("smencr.out", "rb"); |
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if (!in) |
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goto err; |
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out = BIO_new_file("encrout.txt", "w"); |
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if (!out) |
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goto err; |
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/* Decrypt S/MIME message */ |
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if (!CMS_decrypt(cms, rkey, rcert, dcont, out, 0)) |
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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 Decrypting 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 (rkey) |
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EVP_PKEY_free(rkey); |
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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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if (dcont) |
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BIO_free(dcont); |
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return ret; |
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}
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