diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/ocsp/ocsp_ht.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/ocsp/ocsp_ht.c | 502 |
1 files changed, 502 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/ocsp/ocsp_ht.c b/openssl-1.1.0h/crypto/ocsp/ocsp_ht.c new file mode 100644 index 0000000..d8796ca --- /dev/null +++ b/openssl-1.1.0h/crypto/ocsp/ocsp_ht.c @@ -0,0 +1,502 @@ +/* + * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include <stdio.h> +#include <stdlib.h> +#include <ctype.h> +#include <string.h> +#include "e_os.h" +#include <openssl/asn1.h> +#include <openssl/ocsp.h> +#include <openssl/err.h> +#include <openssl/buffer.h> + +/* Stateful OCSP request code, supporting non-blocking I/O */ + +/* Opaque OCSP request status structure */ + +struct ocsp_req_ctx_st { + int state; /* Current I/O state */ + unsigned char *iobuf; /* Line buffer */ + int iobuflen; /* Line buffer length */ + BIO *io; /* BIO to perform I/O with */ + BIO *mem; /* Memory BIO response is built into */ + unsigned long asn1_len; /* ASN1 length of response */ + unsigned long max_resp_len; /* Maximum length of response */ +}; + +#define OCSP_MAX_RESP_LENGTH (100 * 1024) +#define OCSP_MAX_LINE_LEN 4096; + +/* OCSP states */ + +/* If set no reading should be performed */ +#define OHS_NOREAD 0x1000 +/* Error condition */ +#define OHS_ERROR (0 | OHS_NOREAD) +/* First line being read */ +#define OHS_FIRSTLINE 1 +/* MIME headers being read */ +#define OHS_HEADERS 2 +/* OCSP initial header (tag + length) being read */ +#define OHS_ASN1_HEADER 3 +/* OCSP content octets being read */ +#define OHS_ASN1_CONTENT 4 +/* First call: ready to start I/O */ +#define OHS_ASN1_WRITE_INIT (5 | OHS_NOREAD) +/* Request being sent */ +#define OHS_ASN1_WRITE (6 | OHS_NOREAD) +/* Request being flushed */ +#define OHS_ASN1_FLUSH (7 | OHS_NOREAD) +/* Completed */ +#define OHS_DONE (8 | OHS_NOREAD) +/* Headers set, no final \r\n included */ +#define OHS_HTTP_HEADER (9 | OHS_NOREAD) + +static int parse_http_line1(char *line); + +OCSP_REQ_CTX *OCSP_REQ_CTX_new(BIO *io, int maxline) +{ + OCSP_REQ_CTX *rctx = OPENSSL_zalloc(sizeof(*rctx)); + + if (rctx == NULL) + return NULL; + rctx->state = OHS_ERROR; + rctx->max_resp_len = OCSP_MAX_RESP_LENGTH; + rctx->mem = BIO_new(BIO_s_mem()); + rctx->io = io; + if (maxline > 0) + rctx->iobuflen = maxline; + else + rctx->iobuflen = OCSP_MAX_LINE_LEN; + rctx->iobuf = OPENSSL_malloc(rctx->iobuflen); + if (rctx->iobuf == NULL || rctx->mem == NULL) { + OCSP_REQ_CTX_free(rctx); + return NULL; + } + return rctx; +} + +void OCSP_REQ_CTX_free(OCSP_REQ_CTX *rctx) +{ + if (!rctx) + return; + BIO_free(rctx->mem); + OPENSSL_free(rctx->iobuf); + OPENSSL_free(rctx); +} + +BIO *OCSP_REQ_CTX_get0_mem_bio(OCSP_REQ_CTX *rctx) +{ + return rctx->mem; +} + +void OCSP_set_max_response_length(OCSP_REQ_CTX *rctx, unsigned long len) +{ + if (len == 0) + rctx->max_resp_len = OCSP_MAX_RESP_LENGTH; + else + rctx->max_resp_len = len; +} + +int OCSP_REQ_CTX_i2d(OCSP_REQ_CTX *rctx, const ASN1_ITEM *it, ASN1_VALUE *val) +{ + static const char req_hdr[] = + "Content-Type: application/ocsp-request\r\n" + "Content-Length: %d\r\n\r\n"; + int reqlen = ASN1_item_i2d(val, NULL, it); + if (BIO_printf(rctx->mem, req_hdr, reqlen) <= 0) + return 0; + if (ASN1_item_i2d_bio(it, rctx->mem, val) <= 0) + return 0; + rctx->state = OHS_ASN1_WRITE_INIT; + return 1; +} + +int OCSP_REQ_CTX_nbio_d2i(OCSP_REQ_CTX *rctx, + ASN1_VALUE **pval, const ASN1_ITEM *it) +{ + int rv, len; + const unsigned char *p; + + rv = OCSP_REQ_CTX_nbio(rctx); + if (rv != 1) + return rv; + + len = BIO_get_mem_data(rctx->mem, &p); + *pval = ASN1_item_d2i(NULL, &p, len, it); + if (*pval == NULL) { + rctx->state = OHS_ERROR; + return 0; + } + return 1; +} + +int OCSP_REQ_CTX_http(OCSP_REQ_CTX *rctx, const char *op, const char *path) +{ + static const char http_hdr[] = "%s %s HTTP/1.0\r\n"; + + if (!path) + path = "/"; + + if (BIO_printf(rctx->mem, http_hdr, op, path) <= 0) + return 0; + rctx->state = OHS_HTTP_HEADER; + return 1; +} + +int OCSP_REQ_CTX_set1_req(OCSP_REQ_CTX *rctx, OCSP_REQUEST *req) +{ + return OCSP_REQ_CTX_i2d(rctx, ASN1_ITEM_rptr(OCSP_REQUEST), + (ASN1_VALUE *)req); +} + +int OCSP_REQ_CTX_add1_header(OCSP_REQ_CTX *rctx, + const char *name, const char *value) +{ + if (!name) + return 0; + if (BIO_puts(rctx->mem, name) <= 0) + return 0; + if (value) { + if (BIO_write(rctx->mem, ": ", 2) != 2) + return 0; + if (BIO_puts(rctx->mem, value) <= 0) + return 0; + } + if (BIO_write(rctx->mem, "\r\n", 2) != 2) + return 0; + rctx->state = OHS_HTTP_HEADER; + return 1; +} + +OCSP_REQ_CTX *OCSP_sendreq_new(BIO *io, const char *path, OCSP_REQUEST *req, + int maxline) +{ + + OCSP_REQ_CTX *rctx = NULL; + rctx = OCSP_REQ_CTX_new(io, maxline); + if (rctx == NULL) + return NULL; + + if (!OCSP_REQ_CTX_http(rctx, "POST", path)) + goto err; + + if (req && !OCSP_REQ_CTX_set1_req(rctx, req)) + goto err; + + return rctx; + + err: + OCSP_REQ_CTX_free(rctx); + return NULL; +} + +/* + * Parse the HTTP response. This will look like this: "HTTP/1.0 200 OK". We + * need to obtain the numeric code and (optional) informational message. + */ + +static int parse_http_line1(char *line) +{ + int retcode; + char *p, *q, *r; + /* Skip to first white space (passed protocol info) */ + + for (p = line; *p && !isspace((unsigned char)*p); p++) + continue; + if (!*p) { + OCSPerr(OCSP_F_PARSE_HTTP_LINE1, OCSP_R_SERVER_RESPONSE_PARSE_ERROR); + return 0; + } + + /* Skip past white space to start of response code */ + while (*p && isspace((unsigned char)*p)) + p++; + + if (!*p) { + OCSPerr(OCSP_F_PARSE_HTTP_LINE1, OCSP_R_SERVER_RESPONSE_PARSE_ERROR); + return 0; + } + + /* Find end of response code: first whitespace after start of code */ + for (q = p; *q && !isspace((unsigned char)*q); q++) + continue; + + if (!*q) { + OCSPerr(OCSP_F_PARSE_HTTP_LINE1, OCSP_R_SERVER_RESPONSE_PARSE_ERROR); + return 0; + } + + /* Set end of response code and start of message */ + *q++ = 0; + + /* Attempt to parse numeric code */ + retcode = strtoul(p, &r, 10); + + if (*r) + return 0; + + /* Skip over any leading white space in message */ + while (*q && isspace((unsigned char)*q)) + q++; + + if (*q) { + /* + * Finally zap any trailing white space in message (include CRLF) + */ + + /* We know q has a non white space character so this is OK */ + for (r = q + strlen(q) - 1; isspace((unsigned char)*r); r--) + *r = 0; + } + if (retcode != 200) { + OCSPerr(OCSP_F_PARSE_HTTP_LINE1, OCSP_R_SERVER_RESPONSE_ERROR); + if (!*q) + ERR_add_error_data(2, "Code=", p); + else + ERR_add_error_data(4, "Code=", p, ",Reason=", q); + return 0; + } + + return 1; + +} + +int OCSP_REQ_CTX_nbio(OCSP_REQ_CTX *rctx) +{ + int i, n; + const unsigned char *p; + next_io: + if (!(rctx->state & OHS_NOREAD)) { + n = BIO_read(rctx->io, rctx->iobuf, rctx->iobuflen); + + if (n <= 0) { + if (BIO_should_retry(rctx->io)) + return -1; + return 0; + } + + /* Write data to memory BIO */ + + if (BIO_write(rctx->mem, rctx->iobuf, n) != n) + return 0; + } + + switch (rctx->state) { + case OHS_HTTP_HEADER: + /* Last operation was adding headers: need a final \r\n */ + if (BIO_write(rctx->mem, "\r\n", 2) != 2) { + rctx->state = OHS_ERROR; + return 0; + } + rctx->state = OHS_ASN1_WRITE_INIT; + + /* fall thru */ + case OHS_ASN1_WRITE_INIT: + rctx->asn1_len = BIO_get_mem_data(rctx->mem, NULL); + rctx->state = OHS_ASN1_WRITE; + + /* fall thru */ + case OHS_ASN1_WRITE: + n = BIO_get_mem_data(rctx->mem, &p); + + i = BIO_write(rctx->io, p + (n - rctx->asn1_len), rctx->asn1_len); + + if (i <= 0) { + if (BIO_should_retry(rctx->io)) + return -1; + rctx->state = OHS_ERROR; + return 0; + } + + rctx->asn1_len -= i; + + if (rctx->asn1_len > 0) + goto next_io; + + rctx->state = OHS_ASN1_FLUSH; + + (void)BIO_reset(rctx->mem); + + /* fall thru */ + case OHS_ASN1_FLUSH: + + i = BIO_flush(rctx->io); + + if (i > 0) { + rctx->state = OHS_FIRSTLINE; + goto next_io; + } + + if (BIO_should_retry(rctx->io)) + return -1; + + rctx->state = OHS_ERROR; + return 0; + + case OHS_ERROR: + return 0; + + case OHS_FIRSTLINE: + case OHS_HEADERS: + + /* Attempt to read a line in */ + + next_line: + /* + * Due to &%^*$" memory BIO behaviour with BIO_gets we have to check + * there's a complete line in there before calling BIO_gets or we'll + * just get a partial read. + */ + n = BIO_get_mem_data(rctx->mem, &p); + if ((n <= 0) || !memchr(p, '\n', n)) { + if (n >= rctx->iobuflen) { + rctx->state = OHS_ERROR; + return 0; + } + goto next_io; + } + n = BIO_gets(rctx->mem, (char *)rctx->iobuf, rctx->iobuflen); + + if (n <= 0) { + if (BIO_should_retry(rctx->mem)) + goto next_io; + rctx->state = OHS_ERROR; + return 0; + } + + /* Don't allow excessive lines */ + if (n == rctx->iobuflen) { + rctx->state = OHS_ERROR; + return 0; + } + + /* First line */ + if (rctx->state == OHS_FIRSTLINE) { + if (parse_http_line1((char *)rctx->iobuf)) { + rctx->state = OHS_HEADERS; + goto next_line; + } else { + rctx->state = OHS_ERROR; + return 0; + } + } else { + /* Look for blank line: end of headers */ + for (p = rctx->iobuf; *p; p++) { + if ((*p != '\r') && (*p != '\n')) + break; + } + if (*p) + goto next_line; + + rctx->state = OHS_ASN1_HEADER; + + } + + /* Fall thru */ + + case OHS_ASN1_HEADER: + /* + * Now reading ASN1 header: can read at least 2 bytes which is enough + * for ASN1 SEQUENCE header and either length field or at least the + * length of the length field. + */ + n = BIO_get_mem_data(rctx->mem, &p); + if (n < 2) + goto next_io; + + /* Check it is an ASN1 SEQUENCE */ + if (*p++ != (V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)) { + rctx->state = OHS_ERROR; + return 0; + } + + /* Check out length field */ + if (*p & 0x80) { + /* + * If MSB set on initial length octet we can now always read 6 + * octets: make sure we have them. + */ + if (n < 6) + goto next_io; + n = *p & 0x7F; + /* Not NDEF or excessive length */ + if (!n || (n > 4)) { + rctx->state = OHS_ERROR; + return 0; + } + p++; + rctx->asn1_len = 0; + for (i = 0; i < n; i++) { + rctx->asn1_len <<= 8; + rctx->asn1_len |= *p++; + } + + if (rctx->asn1_len > rctx->max_resp_len) { + rctx->state = OHS_ERROR; + return 0; + } + + rctx->asn1_len += n + 2; + } else + rctx->asn1_len = *p + 2; + + rctx->state = OHS_ASN1_CONTENT; + + /* Fall thru */ + + case OHS_ASN1_CONTENT: + n = BIO_get_mem_data(rctx->mem, NULL); + if (n < (int)rctx->asn1_len) + goto next_io; + + rctx->state = OHS_DONE; + return 1; + + case OHS_DONE: + return 1; + + } + + return 0; + +} + +int OCSP_sendreq_nbio(OCSP_RESPONSE **presp, OCSP_REQ_CTX *rctx) +{ + return OCSP_REQ_CTX_nbio_d2i(rctx, + (ASN1_VALUE **)presp, + ASN1_ITEM_rptr(OCSP_RESPONSE)); +} + +/* Blocking OCSP request handler: now a special case of non-blocking I/O */ + +OCSP_RESPONSE *OCSP_sendreq_bio(BIO *b, const char *path, OCSP_REQUEST *req) +{ + OCSP_RESPONSE *resp = NULL; + OCSP_REQ_CTX *ctx; + int rv; + + ctx = OCSP_sendreq_new(b, path, req, -1); + + if (ctx == NULL) + return NULL; + + do { + rv = OCSP_sendreq_nbio(&resp, ctx); + } while ((rv == -1) && BIO_should_retry(b)); + + OCSP_REQ_CTX_free(ctx); + + if (rv) + return resp; + + return NULL; +} |