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Allow unauthenticated CMP server if missing -trusted, -srvcert, and -secret options

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Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/12806)
This commit is contained in:
Dr. David von Oheimb 2020-08-28 13:37:04 +02:00
parent 15633d74dc
commit b434b2c08d
3 changed files with 18 additions and 4 deletions
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6
apps/cmp.c
View File

@ -1546,10 +1546,8 @@ static int setup_protection_ctx(OSSL_CMP_CTX *ctx, ENGINE *engine)
}
EVP_PKEY_free(pkey);
}
if (opt_secret == NULL && opt_srvcert == NULL && opt_trusted == NULL) {
CMP_err("missing -secret or -srvcert or -trusted");
goto err;
}
if (opt_secret == NULL && opt_srvcert == NULL && opt_trusted == NULL)
CMP_warn("will not authenticate server due to missing -secret, -trusted, or -srvcert");
if (opt_cert != NULL) {
X509 *cert;

8
crypto/cmp/cmp_vfy.c
View File

@ -568,6 +568,10 @@ int OSSL_CMP_validate_msg(OSSL_CMP_CTX *ctx, const OSSL_CMP_MSG *msg)
switch (ossl_cmp_hdr_get_protection_nid(msg->header)) {
/* 5.1.3.1. Shared Secret Information */
case NID_id_PasswordBasedMAC:
if (ctx->secretValue == NULL) {
ossl_cmp_warn(ctx, "no secret available for verifying PBM-based CMP message protection");
return 1;
}
if (verify_PBMAC(ctx, msg)) {
/*
* RFC 4210, 5.3.2: 'Note that if the PKI Message Protection is
@ -615,6 +619,10 @@ int OSSL_CMP_validate_msg(OSSL_CMP_CTX *ctx, const OSSL_CMP_MSG *msg)
default:
scrt = ctx->srvCert;
if (scrt == NULL) {
if (ctx->trusted == NULL) {
ossl_cmp_warn(ctx, "no trust store nor pinned server cert available for verifying signature-based CMP message protection");
return 1;
}
if (check_msg_find_cert(ctx, msg))
return 1;
} else { /* use pinned sender cert */

8
doc/man1/openssl-cmp.pod.in
View File

@ -174,6 +174,7 @@ Default filename is from the environment variable C<OPENSSL_CONF>.
Section(s) to use within config file defining CMP options.
An empty string C<""> means no specific section.
Default is C<cmp>.
Multiple section names may be given, separated by commas and/or whitespace
(where in the latter case the whole argument must be enclosed in "...").
Contents of sections named later may override contents of sections named before.
@ -485,6 +486,9 @@ This option gives more flexibility than the B<-srvcert> option because the
protection certificate is not pinned but may be any certificate
for which a chain to one of the given trusted certificates can be constructed.
If no B<-trusted>, B<-srvcert>, and B<-secret> option is given
then protected response messages from the server are not authenticated.
Multiple filenames may be given, separated by commas and/or whitespace
(where in the latter case the whole argument must be enclosed in "...").
Each source may contain multiple certificates.
@ -809,6 +813,7 @@ Default is one invocation.
=item B<-reqin> I<filenames>
Take sequence of CMP requests from file(s).
Multiple filenames may be given, separated by commas and/or whitespace
(where in the latter case the whole argument must be enclosed in "...").
As many files are read as needed for a complete transaction.
@ -823,18 +828,21 @@ and the CMP server complains that the transaction ID has already been used.
=item B<-reqout> I<filenames>
Save sequence of CMP requests to file(s).
Multiple filenames may be given, separated by commas and/or whitespace.
As many files are written as needed to store the complete transaction.
=item B<-rspin> I<filenames>
Process sequence of CMP responses provided in file(s), skipping server.
Multiple filenames may be given, separated by commas and/or whitespace.
As many files are read as needed for the complete transaction.
=item B<-rspout> I<filenames>
Save sequence of CMP responses to file(s).
Multiple filenames may be given, separated by commas and/or whitespace.
As many files are written as needed to store the complete transaction.