X-Git-Url: https://git.sommitrealweird.co.uk/onak.git/blobdiff_plain/4b8483ae278577a3adc8d84da81d77019704466f..2ffd5444d8c7a73b12039f3a6cf336872f2558c4:/parsekey.c diff --git a/parsekey.c b/parsekey.c index df77493..0f02e8c 100644 --- a/parsekey.c +++ b/parsekey.c @@ -4,6 +4,8 @@ * Jonathan McDowell * * Copyright 2002 Project Purple + * + * $Id: parsekey.c,v 1.8 2003/06/08 19:04:32 noodles Exp $ */ #include @@ -15,6 +17,7 @@ #include "keyid.h" #include "keystructs.h" #include "ll.h" +#include "log.h" #include "mem.h" #include "parsekey.h" @@ -39,11 +42,23 @@ int add_key(struct openpgp_publickey *key) { * * This function takes an list of OpenPGP packets and attempts to parse it * into a list of public keys with signatures and subkeys. + * + * Returns a count of how many keys we parsed. */ int parse_keys(struct openpgp_packet_list *packets, struct openpgp_publickey **keys) { struct openpgp_publickey *curkey = NULL; + int count; + + count = 0; + + /* + * If keys already has some keys in it then set curkey to the last one + * so we add to the end of the list. + */ + for (curkey = *keys; curkey != NULL && curkey->next != NULL; + curkey = curkey->next) ; while (packets != NULL) { switch (packets->packet->tag) { @@ -82,6 +97,7 @@ int parse_keys(struct openpgp_packet_list *packets, } memset(curkey, 0, sizeof(*curkey)); curkey->publickey = packet_dup(packets->packet); + count++; break; case 13: case 17: @@ -103,14 +119,24 @@ int parse_keys(struct openpgp_packet_list *packets, subkey, packet_dup(packets->packet)); break; + case 12: + case 61: + /* + * One of: + * + * Trust packet. Ignore. + * Comment packet. Ignore. + */ + break; default: - printf("Unsupported packet type: %d\n", + logthing(LOGTHING_ERROR, + "Unsupported packet type: %d", packets->packet->tag); } packets = packets->next; } - return 0; + return count; } /** @@ -177,7 +203,9 @@ int read_openpgp_stream(int (*getchar_func)(void *ctx, size_t count, curpacket->packet->newformat = (curchar & 0x40); - // TODO: Better error checking on getchar_func. + /* + * TODO: Better error checking on getchar_func. + */ if (curpacket->packet->newformat) { curpacket->packet->tag = (curchar & 0x3F); rc = getchar_func(ctx, 1, &curchar); @@ -192,7 +220,7 @@ int read_openpgp_stream(int (*getchar_func)(void *ctx, size_t count, } else if (curpacket->packet->length > 223 && curpacket->packet->length < 255) { printf("Partial length; not supported.\n"); - } else { + } else if (curpacket->packet->length == 255) { /* * 5 byte length; ie 255 followed by 3 * bytes of MSB length. @@ -209,7 +237,6 @@ int read_openpgp_stream(int (*getchar_func)(void *ctx, size_t count, rc = getchar_func(ctx, 1, &curchar); curpacket->packet->length = curchar; } - } else { curpacket->packet->tag = (curchar & 0x3C) >> 2; switch (curchar & 3) { @@ -225,21 +252,39 @@ int read_openpgp_stream(int (*getchar_func)(void *ctx, size_t count, curpacket->packet->length += curchar; break; case 2: - printf("Unsupported length type 2.\n"); + rc = getchar_func(ctx, 1, &curchar); + curpacket->packet->length = + (curchar << 24); + rc = getchar_func(ctx, 1, &curchar); + curpacket->packet->length += + (curchar << 16); + rc = getchar_func(ctx, 1, &curchar); + curpacket->packet->length += + (curchar << 8); + rc = getchar_func(ctx, 1, &curchar); + curpacket->packet->length += curchar; break; case 3: - printf("Unsupported length type 3.\n"); + logthing(LOGTHING_ERROR, + "Unsupported length type 3."); + curpacket->packet->length = 0; + curpacket->packet->data = NULL; + rc = -1; break; } } - curpacket->packet->data = - malloc(curpacket->packet->length * + + if (rc == 0) { + curpacket->packet->data = + malloc(curpacket->packet->length * sizeof(unsigned char)); - rc = getchar_func(ctx, curpacket->packet->length, + rc = getchar_func(ctx, + curpacket->packet->length, curpacket->packet->data); + } inpacket = false; } else { - fprintf(stderr, "Unexpected character: 0x%X\n", + logthing(LOGTHING_ERROR, "Unexpected character: 0x%X", curchar); } } @@ -256,64 +301,65 @@ int read_openpgp_stream(int (*getchar_func)(void *ctx, size_t count, * This function uses putchar_func to write characters to an OpenPGP * packet stream from a linked list of packets. */ -int write_openpgp_stream(int (*putchar_func)(void *ctx, unsigned char c), +int write_openpgp_stream(int (*putchar_func)(void *ctx, size_t count, + unsigned char *c), void *ctx, struct openpgp_packet_list *packets) { unsigned char curchar = 0; - int i; while (packets != NULL) { curchar = 0x80; if (packets->packet->newformat) { curchar |= 0x40; curchar |= packets->packet->tag; - putchar_func(ctx, curchar); + putchar_func(ctx, 1, &curchar); if (packets->packet->length < 192) { - putchar_func(ctx, packets->packet->length); + curchar = packets->packet->length; + putchar_func(ctx, 1, &curchar); } else if (packets->packet->length > 191 && packets->packet->length < 8383) { -// fputs("Potentially dodgy code here.\n", stderr); - putchar_func(ctx, - (((packets->packet->length - 192) & - 0xFF00) >> 8) + 192); - - putchar_func(ctx, - (packets->packet->length - 192) & - 0xFF); + curchar = (((packets->packet->length - 192) & + 0xFF00) >> 8) + 192; + putchar_func(ctx, 1, &curchar); + curchar = (packets->packet->length - 192) & + 0xFF; + putchar_func(ctx, 1, &curchar); } else { - fputs("Unsupported new format length.\n", stderr); + logthing(LOGTHING_ERROR, + "Unsupported new format length."); } } else { curchar |= (packets->packet->tag << 2); if (packets->packet->length < 256) { - putchar_func(ctx, curchar); - putchar_func(ctx, packets->packet->length); + putchar_func(ctx, 1, &curchar); + curchar = packets->packet->length; + putchar_func(ctx, 1, &curchar); } else if (packets->packet->length < 0x10000) { curchar |= 1; - putchar_func(ctx, curchar); - putchar_func(ctx, packets->packet->length >> 8); - putchar_func(ctx, - packets->packet->length & 0xFF); + putchar_func(ctx, 1, &curchar); + curchar = packets->packet->length >> 8; + putchar_func(ctx, 1, &curchar); + curchar = packets->packet->length & 0xFF; + putchar_func(ctx, 1, &curchar); } else { curchar |= 2; - putchar_func(ctx, curchar); - putchar_func(ctx, - packets->packet->length >> 24); - putchar_func(ctx, - (packets->packet->length >> 16) & 0xFF); - putchar_func(ctx, - (packets->packet->length >> 8) & 0xFF); - putchar_func(ctx, - packets->packet->length & 0xFF); + putchar_func(ctx, 1, &curchar); + curchar = packets->packet->length >> 24; + putchar_func(ctx, 1, &curchar); + curchar = (packets->packet->length >> 16) & 0xFF; + putchar_func(ctx, 1, &curchar); + curchar = (packets->packet->length >> 8) & 0xFF; + putchar_func(ctx, 1, &curchar); + curchar = packets->packet->length & 0xFF; + putchar_func(ctx, 1, &curchar); } } - for (i = 0; i < packets->packet->length; i++) { - putchar_func(ctx, packets->packet->data[i]); - } + putchar_func(ctx, packets->packet->length, + packets->packet->data); packets = packets->next; } return 0;