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openssl: change how we load DH parameters

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The code already assumes the presence of fopen(3) and errno, and, by
extension, fclose(3) and strerror(3), so just use those instead of the
BIO wrappers.

Additionally, don't fail to initialise if the DH file does exist but
parsing it fails, as per the pre-existing comment about them being
optional.
This commit is contained in:
Aaron Jones 2016-05-25 21:53:09 +00:00
parent 828fe03888
commit 82d827469c
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GPG key ID: 6E854C0FAAD4CEA4
1 changed files with 15 additions and 16 deletions
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31
libratbox/src/openssl.c
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@ -457,26 +457,25 @@ rb_setup_ssl_server(const char *cert, const char *keyfile, const char *dhfile, c
if(dhfile != NULL) if(dhfile != NULL)
{ {
/* DH parameters aren't necessary, but they are nice..if they didn't pass one..that is their problem */ /* DH parameters aren't necessary, but they are nice..if they didn't pass one..that is their problem */
BIO *bio = BIO_new_file(dhfile, "r"); FILE *fp = fopen(dhfile, "r");
if(bio != NULL) DH *dh = NULL;
if(fp == NULL)
{ {
DH *dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); rb_lib_log("rb_setup_ssl_server: Error loading DH params file [%s]: %s",
if(dh == NULL) dhfile, strerror(errno));
{ }
rb_lib_log else if(PEM_read_DHparams(fp, &dh, NULL, NULL) == NULL)
("rb_setup_ssl_server: Error loading DH params file [%s]: %s", {
dhfile, get_ssl_error(ERR_get_error())); rb_lib_log("rb_setup_ssl_server: Error loading DH params file [%s]: %s",
BIO_free(bio); dhfile, get_ssl_error(ERR_get_error()));
return 0; fclose(fp);
}
BIO_free(bio);
SSL_CTX_set_tmp_dh(ssl_server_ctx, dh);
DH_free(dh);
} }
else else
{ {
rb_lib_log("rb_setup_ssl_server: Error loading DH params file [%s]: %s", SSL_CTX_set_tmp_dh(ssl_server_ctx, dh);
dhfile, get_ssl_error(ERR_get_error())); DH_free(dh);
fclose(fp);
} }
} }