sigcommon.c File Reference

Shared hashing, signing, and signature-checking code for directory objects. More...

#include "core/or/or.h"
#include "feature/dirparse/parsecommon.h"
#include "feature/dirparse/sigcommon.h"

Go to the source code of this file.

Functions
int	router_get_hash_impl_helper (const char *s, size_t s_len, const char *start_str, const char *end_str, char end_c, int log_severity, const char **start_out, const char **end_out)
int	router_get_hash_impl (const char *s, size_t s_len, char *digest, const char *start_str, const char *end_str, char end_c, digest_algorithm_t alg)
STATIC int	router_compute_hash_final (char *digest, const char *start, size_t len, digest_algorithm_t alg)
int	router_get_hashes_impl (const char *s, size_t s_len, common_digests_t *digests, const char *start_str, const char *end_str, char end_c)
STATIC int	signed_digest_equals (const uint8_t *d1, const uint8_t *d2, size_t len)
int	check_signature_token (const char *digest, ssize_t digest_len, directory_token_t *tok, crypto_pk_t *pkey, int flags, const char *doctype)

Detailed Description

Shared hashing, signing, and signature-checking code for directory objects.

Definition in file sigcommon.c.

Function Documentation

check_signature_token()

int check_signature_token	(	const char *	digest,
		ssize_t	digest_len,
		directory_token_t *	tok,
		crypto_pk_t *	pkey,
		int	flags,
		const char *	doctype
	)

Check whether the object body of the token in tok has a good signature for digest using key pkey. If CST_NO_CHECK_OBJTYPE is set, do not check the object type of the signature object. Use doctype as the type of the document when generating log messages. Return 0 on success, negative on failure.

Definition at line 148 of file sigcommon.c.

router_compute_hash_final()

STATIC int router_compute_hash_final	(	char *	digest,
		const char *	start,
		size_t	len,
		digest_algorithm_t	alg
	)

Compute the digest of the len-byte directory object at start, using alg. Store the result in digest, which must be long enough to hold it.

Definition at line 93 of file sigcommon.c.

Referenced by router_get_hash_impl().

router_get_hash_impl()

int router_get_hash_impl	(	const char *	s,
		size_t	s_len,
		char *	digest,
		const char *	start_str,
		const char *	end_str,
		char	end_c,
		digest_algorithm_t	alg
	)

Compute the digest of the substring of s taken from the first occurrence of start_str through the first instance of c after the first subsequent occurrence of end_str; store the 20-byte or 32-byte result in digest; return 0 on success.

If no such substring exists, return -1.

Definition at line 74 of file sigcommon.c.

Referenced by router_get_extrainfo_hash(), and router_get_router_hash().

router_get_hash_impl_helper()

int router_get_hash_impl_helper	(	const char *	s,
		size_t	s_len,
		const char *	start_str,
		const char *	end_str,
		char	end_c,
		int	log_severity,
		const char **	start_out,
		const char **	end_out
	)

Helper function for router_get_hash_impl: given s, s_len, start_str, end_str, and end_c with the same semantics as in that function, set *start_out (inclusive) and *end_out (exclusive) to the boundaries of the string to be hashed.

Return 0 on success and -1 on failure.

Definition at line 27 of file sigcommon.c.

Referenced by router_get_hash_impl(), router_get_hashes_impl(), and router_get_networkstatus_v3_signed_boundaries().

router_get_hashes_impl()

int router_get_hashes_impl	(	const char *	s,
		size_t	s_len,
		common_digests_t *	digests,
		const char *	start_str,
		const char *	end_str,
		char	end_c
	)

As router_get_hash_impl, but compute all hashes.

Definition at line 112 of file sigcommon.c.

Referenced by router_get_networkstatus_v3_hashes().