Attachment 3522 Details for Bug 3279 – debug failed libcrypto call

[patch] debug failed libcrypto call

bz3279_debug_libcrypto.diff (text/plain), 1.12 KB, created by Damien Miller on 2021-05-20 12:05:12 AEST

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Creator: Damien Miller

Created: 2021-05-20 12:05:12 AEST

Size: 1.12 KB

patch

obsolete

>commit f4fa73e82d001dc8f77efd9fa8a321e369be62d1
>Author: Damien Miller <djm@mindrot.org>
>Date:   Thu May 20 12:04:04 2021 +1000
>
>    debug rsa fail
>
>diff --git a/ssh-rsa.c b/ssh-rsa.c
>index 9b14f9a9a..d0bfb5d41 100644
>--- a/ssh-rsa.c
>+++ b/ssh-rsa.c
>@@ -34,6 +34,7 @@
> #include "sshkey.h"
> #include "digest.h"
> #include "log.h"
>+#include "misc.h"
> 
> #include "openbsd-compat/openssl-compat.h"
> 
>@@ -399,6 +400,14 @@ rsa_hash_alg_oid(int hash_alg, const u_char **oidp, size_t *oidlenp)
> 	return 0;
> }
> 
>+static int
>+dump_libcrypto_error(const char *str, size_t len, void *u)
>+{
>+	debug("%s: libcrypto: %.*s", (char*)u, (int)len, str);
>+	return 0;
>+}
>+
>+
> static int
> openssh_RSA_verify(int hash_alg, u_char *hash, size_t hashlen,
>     u_char *sigbuf, size_t siglen, RSA *rsa)
>@@ -428,6 +437,8 @@ openssh_RSA_verify(int hash_alg, u_char *hash, size_t hashlen,
> 	}
> 	if ((len = RSA_public_decrypt(siglen, sigbuf, decrypted, rsa,
> 	    RSA_PKCS1_PADDING)) < 0) {
>+		debug_f("failed RSA_public_decrypt: sig=%s", tohex(sigbuf, siglen));
>+		ERR_print_errors_cb(dump_libcrypto_error, (void*)__func__);
> 		ret = SSH_ERR_LIBCRYPTO_ERROR;
> 		goto done;
> 	}

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Attachments on bug 3279: 3505 | 3506 | 3507 | 3513 | 3514 | 3521 | 3522 | 3535 | 3536 | 3537 | 3538