X-Git-Url: https://git.sommitrealweird.co.uk/onak.git/blobdiff_plain/0f4971d043c38bae1bfb95201622a1405110f899..393d83b8760584006eaefd6fc370abead228e02a:/keyid.c?ds=sidebyside

diff --git a/keyid.c b/keyid.c
index 8cf32ba..2bec710 100644
--- a/keyid.c
+++ b/keyid.c
@@ -4,8 +4,6 @@
  * Jonathan McDowell <noodles@earth.li>
  *
  * Copyright 2002 Project Purple
- *
- * $Id: keyid.c,v 1.7 2003/06/04 20:57:09 noodles Exp $
  */
 
 #include <sys/types.h>
@@ -14,7 +12,7 @@
 #include "keystructs.h"
 #include "log.h"
 #include "md5.h"
-#include "sha.h"
+#include "sha1.h"
 
 
 /**
@@ -40,60 +38,55 @@ unsigned char *get_fingerprint(struct openpgp_packet *packet,
 	unsigned char *fingerprint,
 	size_t *len)
 {
-	SHA1_CONTEXT sha_ctx;
-	MD5_CONTEXT md5_ctx;
+	SHA1_CTX sha_ctx;
+	struct md5_ctx md5_context;
 	unsigned char c;
-	unsigned char *buff = NULL;
 	size_t         modlen, explen;
 
-	assert(fingerprint != NULL);
-	assert(len != NULL);
+	log_assert(fingerprint != NULL);
+	log_assert(len != NULL);
 
 	*len = 0;
 
 	switch (packet->data[0]) {
 	case 2:
 	case 3:
-		md5_init(&md5_ctx);
+		md5_init_ctx(&md5_context);
 
 		/*
 		 * MD5 the modulus and exponent.
 		 */
 		modlen = ((packet->data[8] << 8) +
 			 packet->data[9] + 7) >> 3;
-		md5_write(&md5_ctx, &packet->data[10], modlen);
+		md5_process_bytes(&packet->data[10], modlen, &md5_context);
 
 		explen = ((packet->data[10+modlen] << 8) +
 			 packet->data[11+modlen] + 7) >> 3;
-		md5_write(&md5_ctx, &packet->data[12 + modlen], explen);
-
-		md5_final(&md5_ctx);
-		buff = md5_read(&md5_ctx);
+		md5_process_bytes(&packet->data[12 + modlen], explen,
+				&md5_context);
 
+		md5_finish_ctx(&md5_context, fingerprint);
 		*len = 16;
-		memcpy(fingerprint, buff, *len);
 
 		break;
 
 	case 4:
-		sha1_init(&sha_ctx);
+		SHA1Init(&sha_ctx);
 		/*
 		 * TODO: Can this be 0x99? Are all public key packets old
 		 * format with 2 bytes of length data?
 		 */
 		c = 0x99;
-		sha1_write(&sha_ctx, &c, sizeof(c));
+		SHA1Update(&sha_ctx, &c, sizeof(c));
 		c = packet->length >> 8;
-		sha1_write(&sha_ctx, &c, sizeof(c));
+		SHA1Update(&sha_ctx, &c, sizeof(c));
 		c = packet->length & 0xFF;
-		sha1_write(&sha_ctx, &c, sizeof(c));
-		sha1_write(&sha_ctx, packet->data,
+		SHA1Update(&sha_ctx, &c, sizeof(c));
+		SHA1Update(&sha_ctx, packet->data,
 			packet->length);
-		sha1_final(&sha_ctx);
-		buff = sha1_read(&sha_ctx);
-
+		SHA1Final(fingerprint, &sha_ctx);
 		*len = 20;
-		memcpy(fingerprint, buff, *len);
+
 		break;
 	default:
 		logthing(LOGTHING_ERROR, "Unknown key type: %d",
@@ -116,7 +109,7 @@ uint64_t get_packetid(struct openpgp_packet *packet)
 	size_t		length = 0;
 	unsigned char	buff[20];
 
-	assert(packet != NULL);
+	log_assert(packet != NULL);
 
 	switch (packet->data[0]) {
 	case 2:
@@ -125,21 +118,26 @@ uint64_t get_packetid(struct openpgp_packet *packet)
 		 * For a type 2 or 3 key the keyid is the last 64 bits of the
 		 * public modulus n, which is stored as an MPI from offset 8
 		 * onwards.
-		 *
-		 * We need to ensure it's an RSA key.
 		 */
-		if (packet->data[7] == 1) {
-			offset = (packet->data[8] << 8) +
-				packet->data[9];
-			offset = ((offset + 7) / 8) + 2;
-
-			for (keyid = 0, i = 0; i < 8; i++) {
-				keyid <<= 8;
-				keyid += packet->data[offset++];
-			}
-		} else {
-			logthing(LOGTHING_ERROR,
-					"Type 2 or 3 key, but not RSA.");
+		offset = (packet->data[8] << 8) +
+			packet->data[9];
+		offset = ((offset + 7) / 8) + 2;
+
+		for (keyid = 0, i = 0; i < 8; i++) {
+			keyid <<= 8;
+			keyid += packet->data[offset++];
+		}
+		/*
+		 * Check for an RSA key; if not then log but accept anyway.
+		 * 1 == RSA
+		 * 2 == RSA Encrypt-Only
+		 * 3 == RSA Sign-Only
+		 */
+		if (packet->data[7] < 1 || packet->data[7] > 3) {
+			logthing(LOGTHING_NOTICE,
+				"Type 2 or 3 key, but not RSA: %llx (type %d)",
+				keyid,
+				packet->data[7]);
 		}
 		break;
 	case 4: