mail archive of the barebox mailing list
 help / color / mirror / Atom feed
From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
To: barebox@lists.infradead.org
Subject: [PATCH 3/9] digest: add verify callback
Date: Tue, 17 Mar 2015 12:53:10 +0100	[thread overview]
Message-ID: <1426593196-12509-3-git-send-email-plagnioj@jcrosoft.com> (raw)
In-Reply-To: <1426593196-12509-1-git-send-email-plagnioj@jcrosoft.com>

this will allow to compare a md with the original one

When calling this do not call final

For RSA_SIGN verification final does not exist only verify
as final will be for signing

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 crypto/digest.c   | 24 +++++++++++++++++++++++-
 crypto/hmac.c     |  1 +
 crypto/internal.h |  2 ++
 crypto/md5.c      |  1 +
 crypto/sha1.c     |  1 +
 crypto/sha2.c     |  2 ++
 crypto/sha4.c     |  2 ++
 include/digest.h  |  6 ++++++
 8 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/crypto/digest.c b/crypto/digest.c
index 208a204..7869c04 100644
--- a/crypto/digest.c
+++ b/crypto/digest.c
@@ -26,6 +26,8 @@
 #include <module.h>
 #include <linux/err.h>
 
+#include "internal.h"
+
 static LIST_HEAD(digests);
 
 static struct digest_algo *digest_algo_get_by_name(const char *name);
@@ -37,9 +39,29 @@ static int dummy_init(struct digest *d)
 
 static void dummy_free(struct digest *d) {}
 
+int digest_generic_verify(struct digest *d, const unsigned char *md)
+{
+	int ret;
+	int len = digest_length(d);
+	unsigned char *tmp;
+
+	tmp = xmalloc(len);
+
+	ret = digest_final(d, tmp);
+	if (ret)
+		goto end;
+
+	ret = memcmp(md, tmp, len);
+	ret = ret ? -EINVAL : 0;
+end:
+	free(tmp);
+	return ret;
+}
+
 int digest_algo_register(struct digest_algo *d)
 {
-	if (!d || !d->name || !d->update || !d->final || d->length < 1)
+	if (!d || !d->name || !d->update || !d->final || !d->verify ||
+	    d->length < 1)
 		return -EINVAL;
 
 	if (!d->init)
diff --git a/crypto/hmac.c b/crypto/hmac.c
index 1462730..f39e4c8 100644
--- a/crypto/hmac.c
+++ b/crypto/hmac.c
@@ -136,6 +136,7 @@ struct digest_algo hmac_algo = {
 	.init = digest_hmac_init,
 	.update = digest_hmac_update,
 	.final = digest_hmac_final,
+	.verify = digest_generic_verify,
 	.set_key = digest_hmac_set_key,
 	.free = digest_hmac_free,
 	.ctx_length = sizeof(struct digest_hmac),
diff --git a/crypto/internal.h b/crypto/internal.h
index cc409d8..f482654 100644
--- a/crypto/internal.h
+++ b/crypto/internal.h
@@ -13,3 +13,5 @@ static inline int digest_hmac_register(struct digest_algo *algo,
 	return 0;
 }
 #endif
+
+int digest_generic_verify(struct digest *d, const unsigned char *md);
diff --git a/crypto/md5.c b/crypto/md5.c
index fe17ff5..4847b38 100644
--- a/crypto/md5.c
+++ b/crypto/md5.c
@@ -294,6 +294,7 @@ static struct digest_algo md5 = {
 	.init = digest_md5_init,
 	.update = digest_md5_update,
 	.final = digest_md5_final,
+	.verify = digest_generic_verify,
 	.length = 16,
 	.ctx_length = sizeof(struct MD5Context),
 };
diff --git a/crypto/sha1.c b/crypto/sha1.c
index a244b5d..09dee87 100644
--- a/crypto/sha1.c
+++ b/crypto/sha1.c
@@ -315,6 +315,7 @@ static struct digest_algo m = {
 	.init = digest_sha1_init,
 	.update = digest_sha1_update,
 	.final = digest_sha1_final,
+	.verify = digest_generic_verify,
 	.length = SHA1_SUM_LEN,
 	.ctx_length = sizeof(sha1_context),
 };
diff --git a/crypto/sha2.c b/crypto/sha2.c
index cb89c82..9bf6541 100644
--- a/crypto/sha2.c
+++ b/crypto/sha2.c
@@ -304,6 +304,7 @@ static struct digest_algo m224 = {
 	.init = digest_sha224_init,
 	.update = digest_sha2_update,
 	.final = digest_sha2_final,
+	.verify = digest_generic_verify,
 	.length = SHA224_SUM_LEN,
 	.ctx_length = sizeof(sha2_context),
 };
@@ -335,6 +336,7 @@ static struct digest_algo m256 = {
 	.init = digest_sha256_init,
 	.update = digest_sha2_update,
 	.final = digest_sha2_final,
+	.verify = digest_generic_verify,
 	.length = SHA256_SUM_LEN,
 	.ctx_length = sizeof(sha2_context),
 };
diff --git a/crypto/sha4.c b/crypto/sha4.c
index 1c768e7..5c3097d 100644
--- a/crypto/sha4.c
+++ b/crypto/sha4.c
@@ -309,6 +309,7 @@ static struct digest_algo m384 = {
 	.init = digest_sha384_init,
 	.update = digest_sha4_update,
 	.final = digest_sha4_final,
+	.verify = digest_generic_verify,
 	.length = SHA384_SUM_LEN,
 	.ctx_length = sizeof(sha4_context),
 };
@@ -341,6 +342,7 @@ static struct digest_algo m512 = {
 	.init = digest_sha512_init,
 	.update = digest_sha4_update,
 	.final = digest_sha4_final,
+	.verify = digest_generic_verify,
 	.length = SHA512_SUM_LEN,
 	.ctx_length = sizeof(sha4_context),
 };
diff --git a/include/digest.h b/include/digest.h
index 1c742f6..5d1d80c 100644
--- a/include/digest.h
+++ b/include/digest.h
@@ -32,6 +32,7 @@ struct digest_algo {
 	int (*update)(struct digest *d, const void *data, unsigned long len);
 	int (*final)(struct digest *d, unsigned char *md);
 	int (*set_key)(struct digest *d, const unsigned char *key, unsigned int len);
+	int (*verify)(struct digest *d, const unsigned char *md);
 
 	unsigned int length;
 	unsigned int ctx_length;
@@ -77,6 +78,11 @@ static inline int digest_final(struct digest *d, unsigned char *md)
 	return d->algo->final(d, md);
 }
 
+static inline int digest_verify(struct digest *d, const unsigned char *md)
+{
+	return d->algo->verify(d, md);
+}
+
 static inline int digest_length(struct digest *d)
 {
 	return d->algo->length;
-- 
2.1.4


_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

  parent reply	other threads:[~2015-03-17 11:53 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-17 11:49 [PATCH 0/9 v4] prepare for rsa support Jean-Christophe PLAGNIOL-VILLARD
2015-03-17 11:53 ` [PATCH 1/9] crypto: digest: digest_file_window: check every digest_xxx return Jean-Christophe PLAGNIOL-VILLARD
2015-03-17 11:53   ` [PATCH 2/9] crypto: digest: digest_file_window/digest_file/digest_file_by_name drop key params Jean-Christophe PLAGNIOL-VILLARD
2015-03-17 11:53   ` Jean-Christophe PLAGNIOL-VILLARD [this message]
2015-03-17 11:53   ` [PATCH 4/9] digest: add digest callback Jean-Christophe PLAGNIOL-VILLARD
2015-03-17 11:53   ` [PATCH 5/9] crypto: hmac: use digest_digest and check the return of every digest_xxx Jean-Christophe PLAGNIOL-VILLARD
2015-03-17 11:53   ` [PATCH 6/9] crypto: add pbkdf2 hmac key generator Jean-Christophe PLAGNIOL-VILLARD
2015-03-17 11:53   ` [PATCH 7/9] command: allow runtime usage Jean-Christophe PLAGNIOL-VILLARD
2015-03-17 11:53   ` [PATCH 8/9] command: rename digest.c to hashsum.c Jean-Christophe PLAGNIOL-VILLARD
2015-03-17 11:53   ` [PATCH 9/9] command: add generic digest command Jean-Christophe PLAGNIOL-VILLARD
2015-03-17 12:54 ` [PATCH 0/9 v4] prepare for rsa support Jan Lübbe
2015-03-18  7:44 ` Sascha Hauer

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1426593196-12509-3-git-send-email-plagnioj@jcrosoft.com \
    --to=plagnioj@jcrosoft.com \
    --cc=barebox@lists.infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox