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85 lines
1.5 KiB
85 lines
1.5 KiB
/* Simple S/MIME verification example */ |
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#include <openssl/pem.h> |
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#include <openssl/pkcs7.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, *cont = NULL; |
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X509_STORE *st = NULL; |
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X509 *cacert = NULL; |
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PKCS7 *p7 = 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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/* Set up trusted CA certificate store */ |
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st = X509_STORE_new(); |
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/* Read in signer certificate and private key */ |
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tbio = BIO_new_file("cacert.pem", "r"); |
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if (!tbio) |
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goto err; |
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cacert = PEM_read_bio_X509(tbio, NULL, 0, NULL); |
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if (!cacert) |
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goto err; |
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if (!X509_STORE_add_cert(st, cacert)) |
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goto err; |
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/* Open content being signed */ |
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in = BIO_new_file("smout.txt", "r"); |
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if (!in) |
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goto err; |
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/* Sign content */ |
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p7 = SMIME_read_PKCS7(in, &cont); |
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if (!p7) |
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goto err; |
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/* File to output verified content to */ |
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out = BIO_new_file("smver.txt", "w"); |
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if (!out) |
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goto err; |
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if (!PKCS7_verify(p7, NULL, st, cont, out, 0)) { |
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fprintf(stderr, "Verification Failure\n"); |
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goto err; |
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} |
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fprintf(stderr, "Verification Successful\n"); |
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ret = 0; |
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err: |
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if (ret) { |
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fprintf(stderr, "Error Verifying Data\n"); |
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ERR_print_errors_fp(stderr); |
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} |
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if (p7) |
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PKCS7_free(p7); |
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if (cacert) |
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X509_free(cacert); |
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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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return ret; |
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}
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