/* * git-imap-send - drops patches into an imap Drafts folder * derived from isync/mbsync - mailbox synchronizer * * Copyright (C) 2000-2002 Michael R. Elkins * Copyright (C) 2002-2004 Oswald Buddenhagen * Copyright (C) 2004 Theodore Y. Ts'o * Copyright (C) 2006 Mike McCormack * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . */ #include "cache.h" #include "config.h" #include "credential.h" #include "exec-cmd.h" #include "run-command.h" #include "parse-options.h" #ifdef NO_OPENSSL typedef void *SSL; #endif #ifdef USE_CURL_FOR_IMAP_SEND #include "http.h" #endif #if defined(USE_CURL_FOR_IMAP_SEND) /* Always default to curl if it's available. */ #define USE_CURL_DEFAULT 1 #else /* We don't have curl, so continue to use the historical implementation */ #define USE_CURL_DEFAULT 0 #endif static int verbosity; static int use_curl = USE_CURL_DEFAULT; static const char * const imap_send_usage[] = { "git imap-send [-v] [-q] [--[no-]curl] < ", NULL }; static struct option imap_send_options[] = { OPT__VERBOSITY(&verbosity), OPT_BOOL(0, "curl", &use_curl, "use libcurl to communicate with the IMAP server"), OPT_END() }; #undef DRV_OK #define DRV_OK 0 #define DRV_MSG_BAD -1 #define DRV_BOX_BAD -2 #define DRV_STORE_BAD -3 __attribute__((format (printf, 1, 2))) static void imap_info(const char *, ...); __attribute__((format (printf, 1, 2))) static void imap_warn(const char *, ...); static char *next_arg(char **); __attribute__((format (printf, 3, 4))) static int nfsnprintf(char *buf, int blen, const char *fmt, ...); static int nfvasprintf(char **strp, const char *fmt, va_list ap) { int len; char tmp[8192]; len = vsnprintf(tmp, sizeof(tmp), fmt, ap); if (len < 0) die("Fatal: Out of memory"); if (len >= sizeof(tmp)) die("imap command overflow!"); *strp = xmemdupz(tmp, len); return len; } struct imap_server_conf { const char *name; const char *tunnel; const char *host; int port; const char *folder; const char *user; const char *pass; int use_ssl; int ssl_verify; int use_html; const char *auth_method; }; static struct imap_server_conf server = { NULL, /* name */ NULL, /* tunnel */ NULL, /* host */ 0, /* port */ NULL, /* folder */ NULL, /* user */ NULL, /* pass */ 0, /* use_ssl */ 1, /* ssl_verify */ 0, /* use_html */ NULL, /* auth_method */ }; struct imap_socket { int fd[2]; SSL *ssl; }; struct imap_buffer { struct imap_socket sock; int bytes; int offset; char buf[1024]; }; struct imap_cmd; struct imap { int uidnext; /* from SELECT responses */ unsigned caps, rcaps; /* CAPABILITY results */ /* command queue */ int nexttag, num_in_progress, literal_pending; struct imap_cmd *in_progress, **in_progress_append; struct imap_buffer buf; /* this is BIG, so put it last */ }; struct imap_store { /* currently open mailbox */ const char *name; /* foreign! maybe preset? */ int uidvalidity; struct imap *imap; const char *prefix; }; struct imap_cmd_cb { int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt); void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response); void *ctx; char *data; int dlen; int uid; }; struct imap_cmd { struct imap_cmd *next; struct imap_cmd_cb cb; char *cmd; int tag; }; #define CAP(cap) (imap->caps & (1 << (cap))) enum CAPABILITY { NOLOGIN = 0, UIDPLUS, LITERALPLUS, NAMESPACE, STARTTLS, AUTH_CRAM_MD5 }; static const char *cap_list[] = { "LOGINDISABLED", "UIDPLUS", "LITERAL+", "NAMESPACE", "STARTTLS", "AUTH=CRAM-MD5", }; #define RESP_OK 0 #define RESP_NO 1 #define RESP_BAD 2 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd); #ifndef NO_OPENSSL static void ssl_socket_perror(const char *func) { fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL)); } #endif static void socket_perror(const char *func, struct imap_socket *sock, int ret) { #ifndef NO_OPENSSL if (sock->ssl) { int sslerr = SSL_get_error(sock->ssl, ret); switch (sslerr) { case SSL_ERROR_NONE: break; case SSL_ERROR_SYSCALL: perror("SSL_connect"); break; default: ssl_socket_perror("SSL_connect"); break; } } else #endif { if (ret < 0) perror(func); else fprintf(stderr, "%s: unexpected EOF\n", func); } } #ifdef NO_OPENSSL static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify) { fprintf(stderr, "SSL requested but SSL support not compiled in\n"); return -1; } #else static int host_matches(const char *host, const char *pattern) { if (pattern[0] == '*' && pattern[1] == '.') { pattern += 2; if (!(host = strchr(host, '.'))) return 0; host++; } return *host && *pattern && !strcasecmp(host, pattern); } static int verify_hostname(X509 *cert, const char *hostname) { int len; X509_NAME *subj; char cname[1000]; int i, found; STACK_OF(GENERAL_NAME) *subj_alt_names; /* try the DNS subjectAltNames */ found = 0; if ((subj_alt_names = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL))) { int num_subj_alt_names = sk_GENERAL_NAME_num(subj_alt_names); for (i = 0; !found && i < num_subj_alt_names; i++) { GENERAL_NAME *subj_alt_name = sk_GENERAL_NAME_value(subj_alt_names, i); if (subj_alt_name->type == GEN_DNS && strlen((const char *)subj_alt_name->d.ia5->data) == (size_t)subj_alt_name->d.ia5->length && host_matches(hostname, (const char *)(subj_alt_name->d.ia5->data))) found = 1; } sk_GENERAL_NAME_pop_free(subj_alt_names, GENERAL_NAME_free); } if (found) return 0; /* try the common name */ if (!(subj = X509_get_subject_name(cert))) return error("cannot get certificate subject"); if ((len = X509_NAME_get_text_by_NID(subj, NID_commonName, cname, sizeof(cname))) < 0) return error("cannot get certificate common name"); if (strlen(cname) == (size_t)len && host_matches(hostname, cname)) return 0; return error("certificate owner '%s' does not match hostname '%s'", cname, hostname); } static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify) { #if (OPENSSL_VERSION_NUMBER >= 0x10000000L) const SSL_METHOD *meth; #else SSL_METHOD *meth; #endif SSL_CTX *ctx; int ret; X509 *cert; SSL_library_init(); SSL_load_error_strings(); meth = SSLv23_method(); if (!meth) { ssl_socket_perror("SSLv23_method"); return -1; } ctx = SSL_CTX_new(meth); if (!ctx) { ssl_socket_perror("SSL_CTX_new"); return -1; } if (use_tls_only) SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3); if (verify) SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL); if (!SSL_CTX_set_default_verify_paths(ctx)) { ssl_socket_perror("SSL_CTX_set_default_verify_paths"); return -1; } sock->ssl = SSL_new(ctx); if (!sock->ssl) { ssl_socket_perror("SSL_new"); return -1; } if (!SSL_set_rfd(sock->ssl, sock->fd[0])) { ssl_socket_perror("SSL_set_rfd"); return -1; } if (!SSL_set_wfd(sock->ssl, sock->fd[1])) { ssl_socket_perror("SSL_set_wfd"); return -1; } #ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME /* * SNI (RFC4366) * OpenSSL does not document this function, but the implementation * returns 1 on success, 0 on failure after calling SSLerr(). */ ret = SSL_set_tlsext_host_name(sock->ssl, server.host); if (ret != 1) warning("SSL_set_tlsext_host_name(%s) failed.", server.host); #endif ret = SSL_connect(sock->ssl); if (ret <= 0) { socket_perror("SSL_connect", sock, ret); return -1; } if (verify) { /* make sure the hostname matches that of the certificate */ cert = SSL_get_peer_certificate(sock->ssl); if (!cert) return error("unable to get peer certificate."); if (verify_hostname(cert, server.host) < 0) return -1; } return 0; } #endif static int socket_read(struct imap_socket *sock, char *buf, int len) { ssize_t n; #ifndef NO_OPENSSL if (sock->ssl) n = SSL_read(sock->ssl, buf, len); else #endif n = xread(sock->fd[0], buf, len); if (n <= 0) { socket_perror("read", sock, n); close(sock->fd[0]); close(sock->fd[1]); sock->fd[0] = sock->fd[1] = -1; } return n; } static int socket_write(struct imap_socket *sock, const char *buf, int len) { int n; #ifndef NO_OPENSSL if (sock->ssl) n = SSL_write(sock->ssl, buf, len); else #endif n = write_in_full(sock->fd[1], buf, len); if (n != len) { socket_perror("write", sock, n); close(sock->fd[0]); close(sock->fd[1]); sock->fd[0] = sock->fd[1] = -1; } return n; } static void socket_shutdown(struct imap_socket *sock) { #ifndef NO_OPENSSL if (sock->ssl) { SSL_shutdown(sock->ssl); SSL_free(sock->ssl); } #endif close(sock->fd[0]); close(sock->fd[1]); } /* simple line buffering */ static int buffer_gets(struct imap_buffer *b, char **s) { int n; int start = b->offset; *s = b->buf + start; for (;;) { /* make sure we have enough data to read the \r\n sequence */ if (b->offset + 1 >= b->bytes) { if (start) { /* shift down used bytes */ *s = b->buf; assert(start <= b->bytes); n = b->bytes - start; if (n) memmove(b->buf, b->buf + start, n); b->offset -= start; b->bytes = n; start = 0; } n = socket_read(&b->sock, b->buf + b->bytes, sizeof(b->buf) - b->bytes); if (n <= 0) return -1; b->bytes += n; } if (b->buf[b->offset] == '\r') { assert(b->offset + 1 < b->bytes); if (b->buf[b->offset + 1] == '\n') { b->buf[b->offset] = 0; /* terminate the string */ b->offset += 2; /* next line */ if (0 < verbosity) puts(*s); return 0; } } b->offset++; } /* not reached */ } __attribute__((format (printf, 1, 2))) static void imap_info(const char *msg, ...) { va_list va; if (0 <= verbosity) { va_start(va, msg); vprintf(msg, va); va_end(va); fflush(stdout); } } __attribute__((format (printf, 1, 2))) static void imap_warn(const char *msg, ...) { va_list va; if (-2 < verbosity) { va_start(va, msg); vfprintf(stderr, msg, va); va_end(va); } } static char *next_arg(char **s) { char *ret; if (!s || !*s) return NULL; while (isspace((unsigned char) **s)) (*s)++; if (!**s) { *s = NULL; return NULL; } if (**s == '"') { ++*s; ret = *s; *s = strchr(*s, '"'); } else { ret = *s; while (**s && !isspace((unsigned char) **s)) (*s)++; } if (*s) { if (**s) *(*s)++ = 0; if (!**s) *s = NULL; } return ret; } __attribute__((format (printf, 3, 4))) static int nfsnprintf(char *buf, int blen, const char *fmt, ...) { int ret; va_list va; va_start(va, fmt); if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen) BUG("buffer too small. Please report a bug."); va_end(va); return ret; } static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx, struct imap_cmd_cb *cb, const char *fmt, va_list ap) { struct imap *imap = ctx->imap; struct imap_cmd *cmd; int n, bufl; char buf[1024]; cmd = xmalloc(sizeof(struct imap_cmd)); nfvasprintf(&cmd->cmd, fmt, ap); cmd->tag = ++imap->nexttag; if (cb) cmd->cb = *cb; else memset(&cmd->cb, 0, sizeof(cmd->cb)); while (imap->literal_pending) get_cmd_result(ctx, NULL); if (!cmd->cb.data) bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd); else bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n", cmd->tag, cmd->cmd, cmd->cb.dlen, CAP(LITERALPLUS) ? "+" : ""); if (0 < verbosity) { if (imap->num_in_progress) printf("(%d in progress) ", imap->num_in_progress); if (!starts_with(cmd->cmd, "LOGIN")) printf(">>> %s", buf); else printf(">>> %d LOGIN \n", cmd->tag); } if (socket_write(&imap->buf.sock, buf, bufl) != bufl) { free(cmd->cmd); free(cmd); if (cb) free(cb->data); return NULL; } if (cmd->cb.data) { if (CAP(LITERALPLUS)) { n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen); free(cmd->cb.data); if (n != cmd->cb.dlen || socket_write(&imap->buf.sock, "\r\n", 2) != 2) { free(cmd->cmd); free(cmd); return NULL; } cmd->cb.data = NULL; } else imap->literal_pending = 1; } else if (cmd->cb.cont) imap->literal_pending = 1; cmd->next = NULL; *imap->in_progress_append = cmd; imap->in_progress_append = &cmd->next; imap->num_in_progress++; return cmd; } __attribute__((format (printf, 3, 4))) static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb, const char *fmt, ...) { va_list ap; struct imap_cmd *cmdp; va_start(ap, fmt); cmdp = issue_imap_cmd(ctx, cb, fmt, ap); va_end(ap); if (!cmdp) return RESP_BAD; return get_cmd_result(ctx, cmdp); } __attribute__((format (printf, 3, 4))) static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb, const char *fmt, ...) { va_list ap; struct imap_cmd *cmdp; va_start(ap, fmt); cmdp = issue_imap_cmd(ctx, cb, fmt, ap); va_end(ap); if (!cmdp) return DRV_STORE_BAD; switch (get_cmd_result(ctx, cmdp)) { case RESP_BAD: return DRV_STORE_BAD; case RESP_NO: return DRV_MSG_BAD; default: return DRV_OK; } } static int skip_imap_list_l(char **sp, int level) { char *s = *sp; for (;;) { while (isspace((unsigned char)*s)) s++; if (level && *s == ')') { s++; break; } if (*s == '(') { /* sublist */ s++; if (skip_imap_list_l(&s, level + 1)) goto bail; } else if (*s == '"') { /* quoted string */ s++; for (; *s != '"'; s++) if (!*s) goto bail; s++; } else { /* atom */ for (; *s && !isspace((unsigned char)*s); s++) if (level && *s == ')') break; } if (!level) break; if (!*s) goto bail; } *sp = s; return 0; bail: return -1; } static void skip_list(char **sp) { skip_imap_list_l(sp, 0); } static void parse_capability(struct imap *imap, char *cmd) { char *arg; unsigned i; imap->caps = 0x80000000; while ((arg = next_arg(&cmd))) for (i = 0; i < ARRAY_SIZE(cap_list); i++) if (!strcmp(cap_list[i], arg)) imap->caps |= 1 << i; imap->rcaps = imap->caps; } static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb, char *s) { struct imap *imap = ctx->imap; char *arg, *p; if (!s || *s != '[') return RESP_OK; /* no response code */ s++; if (!(p = strchr(s, ']'))) { fprintf(stderr, "IMAP error: malformed response code\n"); return RESP_BAD; } *p++ = 0; arg = next_arg(&s); if (!arg) { fprintf(stderr, "IMAP error: empty response code\n"); return RESP_BAD; } if (!strcmp("UIDVALIDITY", arg)) { if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg))) { fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n"); return RESP_BAD; } } else if (!strcmp("UIDNEXT", arg)) { if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) { fprintf(stderr, "IMAP error: malformed NEXTUID status\n"); return RESP_BAD; } } else if (!strcmp("CAPABILITY", arg)) { parse_capability(imap, s); } else if (!strcmp("ALERT", arg)) { /* RFC2060 says that these messages MUST be displayed * to the user */ for (; isspace((unsigned char)*p); p++); fprintf(stderr, "*** IMAP ALERT *** %s\n", p); } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) { if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg)) || !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) { fprintf(stderr, "IMAP error: malformed APPENDUID status\n"); return RESP_BAD; } } return RESP_OK; } static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd) { struct imap *imap = ctx->imap; struct imap_cmd *cmdp, **pcmdp; char *cmd; const char *arg, *arg1; int n, resp, resp2, tag; for (;;) { if (buffer_gets(&imap->buf, &cmd)) return RESP_BAD; arg = next_arg(&cmd); if (!arg) { fprintf(stderr, "IMAP error: empty response\n"); return RESP_BAD; } if (*arg == '*') { arg = next_arg(&cmd); if (!arg) { fprintf(stderr, "IMAP error: unable to parse untagged response\n"); return RESP_BAD; } if (!strcmp("NAMESPACE", arg)) { /* rfc2342 NAMESPACE response. */ skip_list(&cmd); /* Personal mailboxes */ skip_list(&cmd); /* Others' mailboxes */ skip_list(&cmd); /* Shared mailboxes */ } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) || !strcmp("NO", arg) || !strcmp("BYE", arg)) { if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK) return resp; } else if (!strcmp("CAPABILITY", arg)) { parse_capability(imap, cmd); } else if ((arg1 = next_arg(&cmd))) { ; /* * Unhandled response-data with at least two words. * Ignore it. * * NEEDSWORK: Previously this case handled ' EXISTS' * and ' RECENT' but as a probably-unintended side * effect it ignores other unrecognized two-word * responses. imap-send doesn't ever try to read * messages or mailboxes these days, so consider * eliminating this case. */ } else { fprintf(stderr, "IMAP error: unable to parse untagged response\n"); return RESP_BAD; } } else if (!imap->in_progress) { fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : ""); return RESP_BAD; } else if (*arg == '+') { /* This can happen only with the last command underway, as it enforces a round-trip. */ cmdp = (struct imap_cmd *)((char *)imap->in_progress_append - offsetof(struct imap_cmd, next)); if (cmdp->cb.data) { n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen); FREE_AND_NULL(cmdp->cb.data); if (n != (int)cmdp->cb.dlen) return RESP_BAD; } else if (cmdp->cb.cont) { if (cmdp->cb.cont(ctx, cmdp, cmd)) return RESP_BAD; } else { fprintf(stderr, "IMAP error: unexpected command continuation request\n"); return RESP_BAD; } if (socket_write(&imap->buf.sock, "\r\n", 2) != 2) return RESP_BAD; if (!cmdp->cb.cont) imap->literal_pending = 0; if (!tcmd) return DRV_OK; } else { tag = atoi(arg); for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next) if (cmdp->tag == tag) goto gottag; fprintf(stderr, "IMAP error: unexpected tag %s\n", arg); return RESP_BAD; gottag: if (!(*pcmdp = cmdp->next)) imap->in_progress_append = pcmdp; imap->num_in_progress--; if (cmdp->cb.cont || cmdp->cb.data) imap->literal_pending = 0; arg = next_arg(&cmd); if (!arg) arg = ""; if (!strcmp("OK", arg)) resp = DRV_OK; else { if (!strcmp("NO", arg)) resp = RESP_NO; else /*if (!strcmp("BAD", arg))*/ resp = RESP_BAD; fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n", !starts_with(cmdp->cmd, "LOGIN") ? cmdp->cmd : "LOGIN ", arg, cmd ? cmd : ""); } if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp) resp = resp2; if (cmdp->cb.done) cmdp->cb.done(ctx, cmdp, resp); free(cmdp->cb.data); free(cmdp->cmd); free(cmdp); if (!tcmd || tcmd == cmdp) return resp; } } /* not reached */ } static void imap_close_server(struct imap_store *ictx) { struct imap *imap = ictx->imap; if (imap->buf.sock.fd[0] != -1) { imap_exec(ictx, NULL, "LOGOUT"); socket_shutdown(&imap->buf.sock); } free(imap); } static void imap_close_store(struct imap_store *ctx) { imap_close_server(ctx); free(ctx); } #ifndef NO_OPENSSL /* * hexchar() and cram() functions are based on the code from the isync * project (http://isync.sf.net/). */ static char hexchar(unsigned int b) { return b < 10 ? '0' + b : 'a' + (b - 10); } #define ENCODED_SIZE(n) (4 * DIV_ROUND_UP((n), 3)) static char *cram(const char *challenge_64, const char *user, const char *pass) { int i, resp_len, encoded_len, decoded_len; unsigned char hash[16]; char hex[33]; char *response, *response_64, *challenge; /* * length of challenge_64 (i.e. base-64 encoded string) is a good * enough upper bound for challenge (decoded result). */ encoded_len = strlen(challenge_64); challenge = xmalloc(encoded_len); decoded_len = EVP_DecodeBlock((unsigned char *)challenge, (unsigned char *)challenge_64, encoded_len); if (decoded_len < 0) die("invalid challenge %s", challenge_64); if (!HMAC(EVP_md5(), pass, strlen(pass), (unsigned char *)challenge, decoded_len, hash, NULL)) die("HMAC error"); hex[32] = 0; for (i = 0; i < 16; i++) { hex[2 * i] = hexchar((hash[i] >> 4) & 0xf); hex[2 * i + 1] = hexchar(hash[i] & 0xf); } /* response: " " */ response = xstrfmt("%s %s", user, hex); resp_len = strlen(response); response_64 = xmallocz(ENCODED_SIZE(resp_len)); encoded_len = EVP_EncodeBlock((unsigned char *)response_64, (unsigned char *)response, resp_len); if (encoded_len < 0) die("EVP_EncodeBlock error"); return (char *)response_64; } #else static char *cram(const char *challenge_64, const char *user, const char *pass) { die("If you want to use CRAM-MD5 authenticate method, " "you have to build git-imap-send with OpenSSL library."); } #endif static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt) { int ret; char *response; response = cram(prompt, server.user, server.pass); ret = socket_write(&ctx->imap->buf.sock, response, strlen(response)); if (ret != strlen(response)) return error("IMAP error: sending response failed"); free(response); return 0; } static void server_fill_credential(struct imap_server_conf *srvc, struct credential *cred) { if (srvc->user && srvc->pass) return; cred->protocol = xstrdup(srvc->use_ssl ? "imaps" : "imap"); cred->host = xstrdup(srvc->host); cred->username = xstrdup_or_null(srvc->user); cred->password = xstrdup_or_null(srvc->pass); credential_fill(cred); if (!srvc->user) srvc->user = xstrdup(cred->username); if (!srvc->pass) srvc->pass = xstrdup(cred->password); } static struct imap_store *imap_open_store(struct imap_server_conf *srvc, const char *folder) { struct credential cred = CREDENTIAL_INIT; struct imap_store *ctx; struct imap *imap; char *arg, *rsp; int s = -1, preauth; CALLOC_ARRAY(ctx, 1); ctx->imap = CALLOC_ARRAY(imap, 1); imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1; imap->in_progress_append = &imap->in_progress; /* open connection to IMAP server */ if (srvc->tunnel) { struct child_process tunnel = CHILD_PROCESS_INIT; imap_info("Starting tunnel '%s'... ", srvc->tunnel); strvec_push(&tunnel.args, srvc->tunnel); tunnel.use_shell = 1; tunnel.in = -1; tunnel.out = -1; if (start_command(&tunnel)) die("cannot start proxy %s", srvc->tunnel); imap->buf.sock.fd[0] = tunnel.out; imap->buf.sock.fd[1] = tunnel.in; imap_info("ok\n"); } else { #ifndef NO_IPV6 struct addrinfo hints, *ai0, *ai; int gai; char portstr[6]; xsnprintf(portstr, sizeof(portstr), "%d", srvc->port); memset(&hints, 0, sizeof(hints)); hints.ai_socktype = SOCK_STREAM; hints.ai_protocol = IPPROTO_TCP; imap_info("Resolving %s... ", srvc->host); gai = getaddrinfo(srvc->host, portstr, &hints, &ai); if (gai) { fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai)); goto bail; } imap_info("ok\n"); for (ai0 = ai; ai; ai = ai->ai_next) { char addr[NI_MAXHOST]; s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); if (s < 0) continue; getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, sizeof(addr), NULL, 0, NI_NUMERICHOST); imap_info("Connecting to [%s]:%s... ", addr, portstr); if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) { close(s); s = -1; perror("connect"); continue; } break; } freeaddrinfo(ai0); #else /* NO_IPV6 */ struct hostent *he; struct sockaddr_in addr; memset(&addr, 0, sizeof(addr)); addr.sin_port = htons(srvc->port); addr.sin_family = AF_INET; imap_info("Resolving %s... ", srvc->host); he = gethostbyname(srvc->host); if (!he) { perror("gethostbyname"); goto bail; } imap_info("ok\n"); addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]); s = socket(PF_INET, SOCK_STREAM, 0); imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port)); if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) { close(s); s = -1; perror("connect"); } #endif if (s < 0) { fputs("Error: unable to connect to server.\n", stderr); goto bail; } imap->buf.sock.fd[0] = s; imap->buf.sock.fd[1] = dup(s); if (srvc->use_ssl && ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) { close(s); goto bail; } imap_info("ok\n"); } /* read the greeting string */ if (buffer_gets(&imap->buf, &rsp)) { fprintf(stderr, "IMAP error: no greeting response\n"); goto bail; } arg = next_arg(&rsp); if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) { fprintf(stderr, "IMAP error: invalid greeting response\n"); goto bail; } preauth = 0; if (!strcmp("PREAUTH", arg)) preauth = 1; else if (strcmp("OK", arg) != 0) { fprintf(stderr, "IMAP error: unknown greeting response\n"); goto bail; } parse_response_code(ctx, NULL, rsp); if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK) goto bail; if (!preauth) { #ifndef NO_OPENSSL if (!srvc->use_ssl && CAP(STARTTLS)) { if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK) goto bail; if (ssl_socket_connect(&imap->buf.sock, 1, srvc->ssl_verify)) goto bail; /* capabilities may have changed, so get the new capabilities */ if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK) goto bail; } #endif imap_info("Logging in...\n"); server_fill_credential(srvc, &cred); if (srvc->auth_method) { struct imap_cmd_cb cb; if (!strcmp(srvc->auth_method, "CRAM-MD5")) { if (!CAP(AUTH_CRAM_MD5)) { fprintf(stderr, "You specified " "CRAM-MD5 as authentication method, " "but %s doesn't support it.\n", srvc->host); goto bail; } /* CRAM-MD5 */ memset(&cb, 0, sizeof(cb)); cb.cont = auth_cram_md5; if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) { fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n"); goto bail; } } else { fprintf(stderr, "Unknown authentication method:%s\n", srvc->host); goto bail; } } else { if (CAP(NOLOGIN)) { fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host); goto bail; } if (!imap->buf.sock.ssl) imap_warn("*** IMAP Warning *** Password is being " "sent in the clear\n"); if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) { fprintf(stderr, "IMAP error: LOGIN failed\n"); goto bail; } } } /* !preauth */ if (cred.username) credential_approve(&cred); credential_clear(&cred); /* check the target mailbox exists */ ctx->name = folder; switch (imap_exec(ctx, NULL, "EXAMINE \"%s\"", ctx->name)) { case RESP_OK: /* ok */ break; case RESP_BAD: fprintf(stderr, "IMAP error: could not check mailbox\n"); goto out; case RESP_NO: if (imap_exec(ctx, NULL, "CREATE \"%s\"", ctx->name) == RESP_OK) { imap_info("Created missing mailbox\n"); } else { fprintf(stderr, "IMAP error: could not create missing mailbox\n"); goto out; } break; } ctx->prefix = ""; return ctx; bail: if (cred.username) credential_reject(&cred); credential_clear(&cred); out: imap_close_store(ctx); return NULL; } /* * Insert CR characters as necessary in *msg to ensure that every LF * character in *msg is preceded by a CR. */ static void lf_to_crlf(struct strbuf *msg) { char *new_msg; size_t i, j; char lastc; /* First pass: tally, in j, the size of the new_msg string: */ for (i = j = 0, lastc = '\0'; i < msg->len; i++) { if (msg->buf[i] == '\n' && lastc != '\r') j++; /* a CR will need to be added here */ lastc = msg->buf[i]; j++; } new_msg = xmallocz(j); /* * Second pass: write the new_msg string. Note that this loop is * otherwise identical to the first pass. */ for (i = j = 0, lastc = '\0'; i < msg->len; i++) { if (msg->buf[i] == '\n' && lastc != '\r') new_msg[j++] = '\r'; lastc = new_msg[j++] = msg->buf[i]; } strbuf_attach(msg, new_msg, j, j + 1); } /* * Store msg to IMAP. Also detach and free the data from msg->data, * leaving msg->data empty. */ static int imap_store_msg(struct imap_store *ctx, struct strbuf *msg) { struct imap *imap = ctx->imap; struct imap_cmd_cb cb; const char *prefix, *box; int ret; lf_to_crlf(msg); memset(&cb, 0, sizeof(cb)); cb.dlen = msg->len; cb.data = strbuf_detach(msg, NULL); box = ctx->name; prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix; ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box); imap->caps = imap->rcaps; if (ret != DRV_OK) return ret; return DRV_OK; } static void wrap_in_html(struct strbuf *msg) { struct strbuf buf = STRBUF_INIT; static char *content_type = "Content-Type: text/html;\n"; static char *pre_open = "
\n";
	static char *pre_close = "
\n"; const char *body = strstr(msg->buf, "\n\n"); if (!body) return; /* Headers but no body; no wrapping needed */ body += 2; strbuf_add(&buf, msg->buf, body - msg->buf - 1); strbuf_addstr(&buf, content_type); strbuf_addch(&buf, '\n'); strbuf_addstr(&buf, pre_open); strbuf_addstr_xml_quoted(&buf, body); strbuf_addstr(&buf, pre_close); strbuf_release(msg); *msg = buf; } static int count_messages(struct strbuf *all_msgs) { int count = 0; char *p = all_msgs->buf; while (1) { if (starts_with(p, "From ")) { p = strstr(p+5, "\nFrom: "); if (!p) break; p = strstr(p+7, "\nDate: "); if (!p) break; p = strstr(p+7, "\nSubject: "); if (!p) break; p += 10; count++; } p = strstr(p+5, "\nFrom "); if (!p) break; p++; } return count; } /* * Copy the next message from all_msgs, starting at offset *ofs, to * msg. Update *ofs to the start of the following message. Return * true iff a message was successfully copied. */ static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs) { char *p, *data; size_t len; if (*ofs >= all_msgs->len) return 0; data = &all_msgs->buf[*ofs]; len = all_msgs->len - *ofs; if (len < 5 || !starts_with(data, "From ")) return 0; p = strchr(data, '\n'); if (p) { p++; len -= p - data; *ofs += p - data; data = p; } p = strstr(data, "\nFrom "); if (p) len = &p[1] - data; strbuf_add(msg, data, len); *ofs += len; return 1; } static int git_imap_config(const char *var, const char *val, void *cb) { if (!strcmp("imap.sslverify", var)) server.ssl_verify = git_config_bool(var, val); else if (!strcmp("imap.preformattedhtml", var)) server.use_html = git_config_bool(var, val); else if (!strcmp("imap.folder", var)) return git_config_string(&server.folder, var, val); else if (!strcmp("imap.user", var)) return git_config_string(&server.user, var, val); else if (!strcmp("imap.pass", var)) return git_config_string(&server.pass, var, val); else if (!strcmp("imap.tunnel", var)) return git_config_string(&server.tunnel, var, val); else if (!strcmp("imap.authmethod", var)) return git_config_string(&server.auth_method, var, val); else if (!strcmp("imap.port", var)) server.port = git_config_int(var, val); else if (!strcmp("imap.host", var)) { if (!val) { git_die_config("imap.host", "Missing value for 'imap.host'"); } else { if (starts_with(val, "imap:")) val += 5; else if (starts_with(val, "imaps:")) { val += 6; server.use_ssl = 1; } if (starts_with(val, "//")) val += 2; server.host = xstrdup(val); } } else return git_default_config(var, val, cb); return 0; } static int append_msgs_to_imap(struct imap_server_conf *server, struct strbuf* all_msgs, int total) { struct strbuf msg = STRBUF_INIT; struct imap_store *ctx = NULL; int ofs = 0; int r; int n = 0; ctx = imap_open_store(server, server->folder); if (!ctx) { fprintf(stderr, "failed to open store\n"); return 1; } ctx->name = server->folder; fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : ""); while (1) { unsigned percent = n * 100 / total; fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total); if (!split_msg(all_msgs, &msg, &ofs)) break; if (server->use_html) wrap_in_html(&msg); r = imap_store_msg(ctx, &msg); if (r != DRV_OK) break; n++; } fprintf(stderr, "\n"); imap_close_store(ctx); return 0; } #ifdef USE_CURL_FOR_IMAP_SEND static CURL *setup_curl(struct imap_server_conf *srvc, struct credential *cred) { CURL *curl; struct strbuf path = STRBUF_INIT; char *uri_encoded_folder; if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK) die("curl_global_init failed"); curl = curl_easy_init(); if (!curl) die("curl_easy_init failed"); server_fill_credential(&server, cred); curl_easy_setopt(curl, CURLOPT_USERNAME, server.user); curl_easy_setopt(curl, CURLOPT_PASSWORD, server.pass); strbuf_addstr(&path, server.use_ssl ? "imaps://" : "imap://"); strbuf_addstr(&path, server.host); if (!path.len || path.buf[path.len - 1] != '/') strbuf_addch(&path, '/'); uri_encoded_folder = curl_easy_escape(curl, server.folder, 0); if (!uri_encoded_folder) die("failed to encode server folder"); strbuf_addstr(&path, uri_encoded_folder); curl_free(uri_encoded_folder); curl_easy_setopt(curl, CURLOPT_URL, path.buf); strbuf_release(&path); curl_easy_setopt(curl, CURLOPT_PORT, server.port); if (server.auth_method) { #if LIBCURL_VERSION_NUM < 0x072200 warning("No LOGIN_OPTIONS support in this cURL version"); #else struct strbuf auth = STRBUF_INIT; strbuf_addstr(&auth, "AUTH="); strbuf_addstr(&auth, server.auth_method); curl_easy_setopt(curl, CURLOPT_LOGIN_OPTIONS, auth.buf); strbuf_release(&auth); #endif } if (!server.use_ssl) curl_easy_setopt(curl, CURLOPT_USE_SSL, (long)CURLUSESSL_TRY); curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, server.ssl_verify); curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, server.ssl_verify); curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer); curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L); if (0 < verbosity || getenv("GIT_CURL_VERBOSE")) http_trace_curl_no_data(); setup_curl_trace(curl); return curl; } static int curl_append_msgs_to_imap(struct imap_server_conf *server, struct strbuf* all_msgs, int total) { int ofs = 0; int n = 0; struct buffer msgbuf = { STRBUF_INIT, 0 }; CURL *curl; CURLcode res = CURLE_OK; struct credential cred = CREDENTIAL_INIT; curl = setup_curl(server, &cred); curl_easy_setopt(curl, CURLOPT_READDATA, &msgbuf); fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : ""); while (1) { unsigned percent = n * 100 / total; int prev_len; fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total); prev_len = msgbuf.buf.len; if (!split_msg(all_msgs, &msgbuf.buf, &ofs)) break; if (server->use_html) wrap_in_html(&msgbuf.buf); lf_to_crlf(&msgbuf.buf); curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, (curl_off_t)(msgbuf.buf.len-prev_len)); res = curl_easy_perform(curl); if(res != CURLE_OK) { fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res)); break; } n++; } fprintf(stderr, "\n"); curl_easy_cleanup(curl); curl_global_cleanup(); if (cred.username) { if (res == CURLE_OK) credential_approve(&cred); else if (res == CURLE_LOGIN_DENIED) credential_reject(&cred); } credential_clear(&cred); return res != CURLE_OK; } #endif int cmd_main(int argc, const char **argv) { struct strbuf all_msgs = STRBUF_INIT; int total; int nongit_ok; setup_git_directory_gently(&nongit_ok); git_config(git_imap_config, NULL); argc = parse_options(argc, (const char **)argv, "", imap_send_options, imap_send_usage, 0); if (argc) usage_with_options(imap_send_usage, imap_send_options); #ifndef USE_CURL_FOR_IMAP_SEND if (use_curl) { warning("--curl not supported in this build"); use_curl = 0; } #elif defined(NO_OPENSSL) if (!use_curl) { warning("--no-curl not supported in this build"); use_curl = 1; } #endif if (!server.port) server.port = server.use_ssl ? 993 : 143; if (!server.folder) { fprintf(stderr, "no imap store specified\n"); return 1; } if (!server.host) { if (!server.tunnel) { fprintf(stderr, "no imap host specified\n"); return 1; } server.host = "tunnel"; } /* read the messages */ if (strbuf_read(&all_msgs, 0, 0) < 0) { error_errno(_("could not read from stdin")); return 1; } if (all_msgs.len == 0) { fprintf(stderr, "nothing to send\n"); return 1; } total = count_messages(&all_msgs); if (!total) { fprintf(stderr, "no messages to send\n"); return 1; } /* write it to the imap server */ if (server.tunnel) return append_msgs_to_imap(&server, &all_msgs, total); #ifdef USE_CURL_FOR_IMAP_SEND if (use_curl) return curl_append_msgs_to_imap(&server, &all_msgs, total); #endif return append_msgs_to_imap(&server, &all_msgs, total); }