diff options
Diffstat (limited to 'lib/gssapi/krb5/cfx.c')
| -rw-r--r-- | lib/gssapi/krb5/cfx.c | 1245 |
1 files changed, 1066 insertions, 179 deletions
diff --git a/lib/gssapi/krb5/cfx.c b/lib/gssapi/krb5/cfx.c index 6452f802ab84..3c1536b60ea5 100644 --- a/lib/gssapi/krb5/cfx.c +++ b/lib/gssapi/krb5/cfx.c @@ -30,12 +30,10 @@ * SUCH DAMAGE. */ -#include "krb5/gsskrb5_locl.h" - -RCSID("$Id: cfx.c 19031 2006-11-13 18:02:57Z lha $"); +#include "gsskrb5_locl.h" /* - * Implementation of draft-ietf-krb-wg-gssapi-cfx-06.txt + * Implementation of RFC 4121 */ #define CFXSentByAcceptor (1 << 0) @@ -46,6 +44,7 @@ krb5_error_code _gsskrb5cfx_wrap_length_cfx(krb5_context context, krb5_crypto crypto, int conf_req_flag, + int dce_style, size_t input_length, size_t *output_length, size_t *cksumsize, @@ -72,7 +71,11 @@ _gsskrb5cfx_wrap_length_cfx(krb5_context context, /* Header is concatenated with data before encryption */ input_length += sizeof(gss_cfx_wrap_token_desc); - ret = krb5_crypto_getpadsize(context, crypto, &padsize); + if (dce_style) { + ret = krb5_crypto_getblocksize(context, crypto, &padsize); + } else { + ret = krb5_crypto_getpadsize(context, crypto, &padsize); + } if (ret) { return ret; } @@ -96,49 +99,48 @@ _gsskrb5cfx_wrap_length_cfx(krb5_context context, return 0; } -krb5_error_code -_gsskrb5cfx_max_wrap_length_cfx(krb5_context context, - krb5_crypto crypto, - int conf_req_flag, - size_t input_length, - OM_uint32 *output_length) +OM_uint32 +_gssapi_wrap_size_cfx(OM_uint32 *minor_status, + const gsskrb5_ctx ctx, + krb5_context context, + int conf_req_flag, + gss_qop_t qop_req, + OM_uint32 req_output_size, + OM_uint32 *max_input_size) { krb5_error_code ret; - *output_length = 0; + *max_input_size = 0; /* 16-byte header is always first */ - if (input_length < 16) + if (req_output_size < 16) return 0; - input_length -= 16; + req_output_size -= 16; if (conf_req_flag) { size_t wrapped_size, sz; - wrapped_size = input_length + 1; + wrapped_size = req_output_size + 1; do { wrapped_size--; - sz = krb5_get_wrapped_length(context, - crypto, wrapped_size); - } while (wrapped_size && sz > input_length); - if (wrapped_size == 0) { - *output_length = 0; + sz = krb5_get_wrapped_length(context, + ctx->crypto, wrapped_size); + } while (wrapped_size && sz > req_output_size); + if (wrapped_size == 0) return 0; - } /* inner header */ - if (wrapped_size < 16) { - *output_length = 0; + if (wrapped_size < 16) return 0; - } + wrapped_size -= 16; - *output_length = wrapped_size; + *max_input_size = wrapped_size; } else { krb5_cksumtype type; size_t cksumsize; - ret = krb5_crypto_get_checksum_type(context, crypto, &type); + ret = krb5_crypto_get_checksum_type(context, ctx->crypto, &type); if (ret) return ret; @@ -146,48 +148,16 @@ _gsskrb5cfx_max_wrap_length_cfx(krb5_context context, if (ret) return ret; - if (input_length < cksumsize) + if (req_output_size < cksumsize) return 0; /* Checksum is concatenated with data */ - *output_length = input_length - cksumsize; + *max_input_size = req_output_size - cksumsize; } return 0; } - -OM_uint32 _gssapi_wrap_size_cfx(OM_uint32 *minor_status, - const gsskrb5_ctx context_handle, - krb5_context context, - int conf_req_flag, - gss_qop_t qop_req, - OM_uint32 req_output_size, - OM_uint32 *max_input_size, - krb5_keyblock *key) -{ - krb5_error_code ret; - krb5_crypto crypto; - - ret = krb5_crypto_init(context, key, 0, &crypto); - if (ret != 0) { - *minor_status = ret; - return GSS_S_FAILURE; - } - - ret = _gsskrb5cfx_max_wrap_length_cfx(context, crypto, conf_req_flag, - req_output_size, max_input_size); - if (ret != 0) { - *minor_status = ret; - krb5_crypto_destroy(context, crypto); - return GSS_S_FAILURE; - } - - krb5_crypto_destroy(context, crypto); - - return GSS_S_COMPLETE; -} - /* * Rotate "rrc" bytes to the front or back */ @@ -212,10 +182,10 @@ rrc_rotate(void *data, size_t len, uint16_t rrc, krb5_boolean unrotate) tmp = buf; } else { tmp = malloc(rrc); - if (tmp == NULL) + if (tmp == NULL) return ENOMEM; } - + if (unrotate) { memcpy(tmp, data, rrc); memmove(data, (u_char *)data + rrc, left); @@ -226,23 +196,971 @@ rrc_rotate(void *data, size_t len, uint16_t rrc, krb5_boolean unrotate) memcpy(data, tmp, rrc); } - if (rrc > sizeof(buf)) + if (rrc > sizeof(buf)) free(tmp); return 0; } +gss_iov_buffer_desc * +_gk_find_buffer(gss_iov_buffer_desc *iov, int iov_count, OM_uint32 type) +{ + int i; + + for (i = 0; i < iov_count; i++) + if (type == GSS_IOV_BUFFER_TYPE(iov[i].type)) + return &iov[i]; + return NULL; +} + +OM_uint32 +_gk_allocate_buffer(OM_uint32 *minor_status, gss_iov_buffer_desc *buffer, size_t size) +{ + if (buffer->type & GSS_IOV_BUFFER_FLAG_ALLOCATED) { + if (buffer->buffer.length == size) + return GSS_S_COMPLETE; + free(buffer->buffer.value); + } + + buffer->buffer.value = malloc(size); + buffer->buffer.length = size; + if (buffer->buffer.value == NULL) { + *minor_status = ENOMEM; + return GSS_S_FAILURE; + } + buffer->type |= GSS_IOV_BUFFER_FLAG_ALLOCATED; + + return GSS_S_COMPLETE; +} + + +OM_uint32 +_gk_verify_buffers(OM_uint32 *minor_status, + const gsskrb5_ctx ctx, + const gss_iov_buffer_desc *header, + const gss_iov_buffer_desc *padding, + const gss_iov_buffer_desc *trailer) +{ + if (header == NULL) { + *minor_status = EINVAL; + return GSS_S_FAILURE; + } + + if (IS_DCE_STYLE(ctx)) { + /* + * In DCE style mode we reject having a padding or trailer buffer + */ + if (padding) { + *minor_status = EINVAL; + return GSS_S_FAILURE; + } + if (trailer) { + *minor_status = EINVAL; + return GSS_S_FAILURE; + } + } else { + /* + * In non-DCE style mode we require having a padding buffer + */ + if (padding == NULL) { + *minor_status = EINVAL; + return GSS_S_FAILURE; + } + } + + *minor_status = 0; + return GSS_S_COMPLETE; +} + +OM_uint32 +_gssapi_wrap_cfx_iov(OM_uint32 *minor_status, + gsskrb5_ctx ctx, + krb5_context context, + int conf_req_flag, + int *conf_state, + gss_iov_buffer_desc *iov, + int iov_count) +{ + OM_uint32 major_status, junk; + gss_iov_buffer_desc *header, *trailer, *padding; + size_t gsshsize, k5hsize; + size_t gsstsize, k5tsize; + size_t rrc = 0, ec = 0; + int i; + gss_cfx_wrap_token token; + krb5_error_code ret; + int32_t seq_number; + unsigned usage; + krb5_crypto_iov *data = NULL; + + header = _gk_find_buffer(iov, iov_count, GSS_IOV_BUFFER_TYPE_HEADER); + if (header == NULL) { + *minor_status = EINVAL; + return GSS_S_FAILURE; + } + + padding = _gk_find_buffer(iov, iov_count, GSS_IOV_BUFFER_TYPE_PADDING); + if (padding != NULL) { + padding->buffer.length = 0; + } + + trailer = _gk_find_buffer(iov, iov_count, GSS_IOV_BUFFER_TYPE_TRAILER); + + major_status = _gk_verify_buffers(minor_status, ctx, header, padding, trailer); + if (major_status != GSS_S_COMPLETE) { + return major_status; + } + + if (conf_req_flag) { + size_t k5psize = 0; + size_t k5pbase = 0; + size_t k5bsize = 0; + size_t size = 0; + + for (i = 0; i < iov_count; i++) { + switch (GSS_IOV_BUFFER_TYPE(iov[i].type)) { + case GSS_IOV_BUFFER_TYPE_DATA: + size += iov[i].buffer.length; + break; + default: + break; + } + } + + size += sizeof(gss_cfx_wrap_token_desc); + + *minor_status = krb5_crypto_length(context, ctx->crypto, + KRB5_CRYPTO_TYPE_HEADER, + &k5hsize); + if (*minor_status) + return GSS_S_FAILURE; + + *minor_status = krb5_crypto_length(context, ctx->crypto, + KRB5_CRYPTO_TYPE_TRAILER, + &k5tsize); + if (*minor_status) + return GSS_S_FAILURE; + + *minor_status = krb5_crypto_length(context, ctx->crypto, + KRB5_CRYPTO_TYPE_PADDING, + &k5pbase); + if (*minor_status) + return GSS_S_FAILURE; + + if (k5pbase > 1) { + k5psize = k5pbase - (size % k5pbase); + } else { + k5psize = 0; + } + + if (k5psize == 0 && IS_DCE_STYLE(ctx)) { + *minor_status = krb5_crypto_getblocksize(context, ctx->crypto, + &k5bsize); + if (*minor_status) + return GSS_S_FAILURE; + ec = k5bsize; + } else { + ec = k5psize; + } + + gsshsize = sizeof(gss_cfx_wrap_token_desc) + k5hsize; + gsstsize = sizeof(gss_cfx_wrap_token_desc) + ec + k5tsize; + } else { + if (IS_DCE_STYLE(ctx)) { + *minor_status = EINVAL; + return GSS_S_FAILURE; + } + + k5hsize = 0; + *minor_status = krb5_crypto_length(context, ctx->crypto, + KRB5_CRYPTO_TYPE_CHECKSUM, + &k5tsize); + if (*minor_status) + return GSS_S_FAILURE; + + gsshsize = sizeof(gss_cfx_wrap_token_desc); + gsstsize = k5tsize; + } + + /* + * + */ + + if (trailer == NULL) { + rrc = gsstsize; + if (IS_DCE_STYLE(ctx)) + rrc -= ec; + gsshsize += gsstsize; + gsstsize = 0; + } else if (GSS_IOV_BUFFER_FLAGS(trailer->type) & GSS_IOV_BUFFER_FLAG_ALLOCATE) { + major_status = _gk_allocate_buffer(minor_status, trailer, gsstsize); + if (major_status) + goto failure; + } else if (trailer->buffer.length < gsstsize) { + *minor_status = KRB5_BAD_MSIZE; + major_status = GSS_S_FAILURE; + goto failure; + } else + trailer->buffer.length = gsstsize; + + /* + * + */ + + if (GSS_IOV_BUFFER_FLAGS(header->type) & GSS_IOV_BUFFER_FLAG_ALLOCATE) { + major_status = _gk_allocate_buffer(minor_status, header, gsshsize); + if (major_status != GSS_S_COMPLETE) + goto failure; + } else if (header->buffer.length < gsshsize) { + *minor_status = KRB5_BAD_MSIZE; + major_status = GSS_S_FAILURE; + goto failure; + } else + header->buffer.length = gsshsize; + + token = (gss_cfx_wrap_token)header->buffer.value; + + token->TOK_ID[0] = 0x05; + token->TOK_ID[1] = 0x04; + token->Flags = 0; + token->Filler = 0xFF; + + if ((ctx->more_flags & LOCAL) == 0) + token->Flags |= CFXSentByAcceptor; + + if (ctx->more_flags & ACCEPTOR_SUBKEY) + token->Flags |= CFXAcceptorSubkey; + + if (ctx->more_flags & LOCAL) + usage = KRB5_KU_USAGE_INITIATOR_SEAL; + else + usage = KRB5_KU_USAGE_ACCEPTOR_SEAL; + + if (conf_req_flag) { + /* + * In Wrap tokens with confidentiality, the EC field is + * used to encode the size (in bytes) of the random filler. + */ + token->Flags |= CFXSealed; + token->EC[0] = (ec >> 8) & 0xFF; + token->EC[1] = (ec >> 0) & 0xFF; + + } else { + /* + * In Wrap tokens without confidentiality, the EC field is + * used to encode the size (in bytes) of the trailing + * checksum. + * + * This is not used in the checksum calcuation itself, + * because the checksum length could potentially vary + * depending on the data length. + */ + token->EC[0] = 0; + token->EC[1] = 0; + } + + /* + * In Wrap tokens that provide for confidentiality, the RRC + * field in the header contains the hex value 00 00 before + * encryption. + * + * In Wrap tokens that do not provide for confidentiality, + * both the EC and RRC fields in the appended checksum + * contain the hex value 00 00 for the purpose of calculating + * the checksum. + */ + token->RRC[0] = 0; + token->RRC[1] = 0; + + HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex); + krb5_auth_con_getlocalseqnumber(context, + ctx->auth_context, + &seq_number); + _gsskrb5_encode_be_om_uint32(0, &token->SND_SEQ[0]); + _gsskrb5_encode_be_om_uint32(seq_number, &token->SND_SEQ[4]); + krb5_auth_con_setlocalseqnumber(context, + ctx->auth_context, + ++seq_number); + HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex); + + data = calloc(iov_count + 3, sizeof(data[0])); + if (data == NULL) { + *minor_status = ENOMEM; + major_status = GSS_S_FAILURE; + goto failure; + } + + if (conf_req_flag) { + /* + plain packet: + + {"header" | encrypt(plaintext-data | ec-padding | E"header")} + + Expanded, this is with with RRC = 0: + + {"header" | krb5-header | plaintext-data | ec-padding | E"header" | krb5-trailer } + + In DCE-RPC mode == no trailer: RRC = gss "trailer" == length(ec-padding | E"header" | krb5-trailer) + + {"header" | ec-padding | E"header" | krb5-trailer | krb5-header | plaintext-data } + */ + + i = 0; + data[i].flags = KRB5_CRYPTO_TYPE_HEADER; + data[i].data.data = ((uint8_t *)header->buffer.value) + header->buffer.length - k5hsize; + data[i].data.length = k5hsize; + + for (i = 1; i < iov_count + 1; i++) { + switch (GSS_IOV_BUFFER_TYPE(iov[i - 1].type)) { + case GSS_IOV_BUFFER_TYPE_DATA: + data[i].flags = KRB5_CRYPTO_TYPE_DATA; + break; + case GSS_IOV_BUFFER_TYPE_SIGN_ONLY: + data[i].flags = KRB5_CRYPTO_TYPE_SIGN_ONLY; + break; + default: + data[i].flags = KRB5_CRYPTO_TYPE_EMPTY; + break; + } + data[i].data.length = iov[i - 1].buffer.length; + data[i].data.data = iov[i - 1].buffer.value; + } + + /* + * Any necessary padding is added here to ensure that the + * encrypted token header is always at the end of the + * ciphertext. + */ + + /* encrypted CFX header in trailer (or after the header if in + DCE mode). Copy in header into E"header" + */ + data[i].flags = KRB5_CRYPTO_TYPE_DATA; + if (trailer) + data[i].data.data = trailer->buffer.value; + else + data[i].data.data = ((uint8_t *)header->buffer.value) + sizeof(*token); + + data[i].data.length = ec + sizeof(*token); + memset(data[i].data.data, 0xFF, ec); + memcpy(((uint8_t *)data[i].data.data) + ec, token, sizeof(*token)); + i++; + + /* Kerberos trailer comes after the gss trailer */ + data[i].flags = KRB5_CRYPTO_TYPE_TRAILER; + data[i].data.data = ((uint8_t *)data[i-1].data.data) + ec + sizeof(*token); + data[i].data.length = k5tsize; + i++; + + ret = krb5_encrypt_iov_ivec(context, ctx->crypto, usage, data, i, NULL); + if (ret != 0) { + *minor_status = ret; + major_status = GSS_S_FAILURE; + goto failure; + } + + if (rrc) { + token->RRC[0] = (rrc >> 8) & 0xFF; + token->RRC[1] = (rrc >> 0) & 0xFF; + } + + } else { + /* + plain packet: + + {data | "header" | gss-trailer (krb5 checksum) + + don't do RRC != 0 + + */ + + for (i = 0; i < iov_count; i++) { + switch (GSS_IOV_BUFFER_TYPE(iov[i].type)) { + case GSS_IOV_BUFFER_TYPE_DATA: + data[i].flags = KRB5_CRYPTO_TYPE_DATA; + break; + case GSS_IOV_BUFFER_TYPE_SIGN_ONLY: + data[i].flags = KRB5_CRYPTO_TYPE_SIGN_ONLY; + break; + default: + data[i].flags = KRB5_CRYPTO_TYPE_EMPTY; + break; + } + data[i].data.length = iov[i].buffer.length; + data[i].data.data = iov[i].buffer.value; + } + + data[i].flags = KRB5_CRYPTO_TYPE_DATA; + data[i].data.data = header->buffer.value; + data[i].data.length = sizeof(gss_cfx_wrap_token_desc); + i++; + + data[i].flags = KRB5_CRYPTO_TYPE_CHECKSUM; + if (trailer) { + data[i].data.data = trailer->buffer.value; + } else { + data[i].data.data = (uint8_t *)header->buffer.value + + sizeof(gss_cfx_wrap_token_desc); + } + data[i].data.length = k5tsize; + i++; + + ret = krb5_create_checksum_iov(context, ctx->crypto, usage, data, i, NULL); + if (ret) { + *minor_status = ret; + major_status = GSS_S_FAILURE; + goto failure; + } + + if (rrc) { + token->RRC[0] = (rrc >> 8) & 0xFF; + token->RRC[1] = (rrc >> 0) & 0xFF; + } + + token->EC[0] = (k5tsize >> 8) & 0xFF; + token->EC[1] = (k5tsize >> 0) & 0xFF; + } + + if (conf_state != NULL) + *conf_state = conf_req_flag; + + free(data); + + *minor_status = 0; + return GSS_S_COMPLETE; + + failure: + if (data) + free(data); + + gss_release_iov_buffer(&junk, iov, iov_count); + + return major_status; +} + +/* This is slowpath */ +static OM_uint32 +unrotate_iov(OM_uint32 *minor_status, size_t rrc, gss_iov_buffer_desc *iov, int iov_count) +{ + uint8_t *p, *q; + size_t len = 0, skip; + int i; + + for (i = 0; i < iov_count; i++) + if (GSS_IOV_BUFFER_TYPE(iov[i].type) == GSS_IOV_BUFFER_TYPE_DATA || + GSS_IOV_BUFFER_TYPE(iov[i].type) == GSS_IOV_BUFFER_TYPE_PADDING || + GSS_IOV_BUFFER_TYPE(iov[i].type) == GSS_IOV_BUFFER_TYPE_TRAILER) + len += iov[i].buffer.length; + + p = malloc(len); + if (p == NULL) { + *minor_status = ENOMEM; + return GSS_S_FAILURE; + } + q = p; + + /* copy up */ + + for (i = 0; i < iov_count; i++) { + if (GSS_IOV_BUFFER_TYPE(iov[i].type) == GSS_IOV_BUFFER_TYPE_DATA || + GSS_IOV_BUFFER_TYPE(iov[i].type) == GSS_IOV_BUFFER_TYPE_PADDING || + GSS_IOV_BUFFER_TYPE(iov[i].type) == GSS_IOV_BUFFER_TYPE_TRAILER) + { + memcpy(q, iov[i].buffer.value, iov[i].buffer.length); + q += iov[i].buffer.length; + } + } + assert((size_t)(q - p) == len); + + /* unrotate first part */ + q = p + rrc; + skip = rrc; + for (i = 0; i < iov_count; i++) { + if (GSS_IOV_BUFFER_TYPE(iov[i].type) == GSS_IOV_BUFFER_TYPE_DATA || + GSS_IOV_BUFFER_TYPE(iov[i].type) == GSS_IOV_BUFFER_TYPE_PADDING || + GSS_IOV_BUFFER_TYPE(iov[i].type) == GSS_IOV_BUFFER_TYPE_TRAILER) + { + if (iov[i].buffer.length <= skip) { + skip -= iov[i].buffer.length; + } else { + memcpy(((uint8_t *)iov[i].buffer.value) + skip, q, iov[i].buffer.length - skip); + q += iov[i].buffer.length - skip; + skip = 0; + } + } + } + /* copy trailer */ + q = p; + skip = rrc; + for (i = 0; i < iov_count; i++) { + if (GSS_IOV_BUFFER_TYPE(iov[i].type) == GSS_IOV_BUFFER_TYPE_DATA || + GSS_IOV_BUFFER_TYPE(iov[i].type) == GSS_IOV_BUFFER_TYPE_PADDING || + GSS_IOV_BUFFER_TYPE(iov[i].type) == GSS_IOV_BUFFER_TYPE_TRAILER) + { + memcpy(q, iov[i].buffer.value, min(iov[i].buffer.length, skip)); + if (iov[i].buffer.length > skip) + break; + skip -= iov[i].buffer.length; + q += iov[i].buffer.length; + } + } + return GSS_S_COMPLETE; +} + + +OM_uint32 +_gssapi_unwrap_cfx_iov(OM_uint32 *minor_status, + gsskrb5_ctx ctx, + krb5_context context, + int *conf_state, + gss_qop_t *qop_state, + gss_iov_buffer_desc *iov, + int iov_count) +{ + OM_uint32 seq_number_lo, seq_number_hi, major_status, junk; + gss_iov_buffer_desc *header, *trailer, *padding; + gss_cfx_wrap_token token, ttoken; + u_char token_flags; + krb5_error_code ret; + unsigned usage; + uint16_t ec, rrc; + krb5_crypto_iov *data = NULL; + int i, j; + + *minor_status = 0; + + header = _gk_find_buffer(iov, iov_count, GSS_IOV_BUFFER_TYPE_HEADER); + if (header == NULL) { + *minor_status = EINVAL; + return GSS_S_FAILURE; + } + + if (header->buffer.length < sizeof(*token)) /* we check exact below */ + return GSS_S_DEFECTIVE_TOKEN; + + padding = _gk_find_buffer(iov, iov_count, GSS_IOV_BUFFER_TYPE_PADDING); + if (padding != NULL && padding->buffer.length != 0) { + *minor_status = EINVAL; + return GSS_S_FAILURE; + } + + trailer = _gk_find_buffer(iov, iov_count, GSS_IOV_BUFFER_TYPE_TRAILER); + + major_status = _gk_verify_buffers(minor_status, ctx, header, padding, trailer); + if (major_status != GSS_S_COMPLETE) { + return major_status; + } + + token = (gss_cfx_wrap_token)header->buffer.value; + + if (token->TOK_ID[0] != 0x05 || token->TOK_ID[1] != 0x04) + return GSS_S_DEFECTIVE_TOKEN; + + /* Ignore unknown flags */ + token_flags = token->Flags & + (CFXSentByAcceptor | CFXSealed | CFXAcceptorSubkey); + + if (token_flags & CFXSentByAcceptor) { + if ((ctx->more_flags & LOCAL) == 0) + return GSS_S_DEFECTIVE_TOKEN; + } + + if (ctx->more_flags & ACCEPTOR_SUBKEY) { + if ((token_flags & CFXAcceptorSubkey) == 0) + return GSS_S_DEFECTIVE_TOKEN; + } else { + if (token_flags & CFXAcceptorSubkey) + return GSS_S_DEFECTIVE_TOKEN; + } + + if (token->Filler != 0xFF) + return GSS_S_DEFECTIVE_TOKEN; + + if (conf_state != NULL) + *conf_state = (token_flags & CFXSealed) ? 1 : 0; + + ec = (token->EC[0] << 8) | token->EC[1]; + rrc = (token->RRC[0] << 8) | token->RRC[1]; + + /* + * Check sequence number + */ + _gsskrb5_decode_be_om_uint32(&token->SND_SEQ[0], &seq_number_hi); + _gsskrb5_decode_be_om_uint32(&token->SND_SEQ[4], &seq_number_lo); + if (seq_number_hi) { + /* no support for 64-bit sequence numbers */ + *minor_status = ERANGE; + return GSS_S_UNSEQ_TOKEN; + } + + HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex); + ret = _gssapi_msg_order_check(ctx->order, seq_number_lo); + if (ret != 0) { + *minor_status = 0; + HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex); + return ret; + } + HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex); + + /* + * Decrypt and/or verify checksum + */ + + if (ctx->more_flags & LOCAL) { + usage = KRB5_KU_USAGE_ACCEPTOR_SEAL; + } else { + usage = KRB5_KU_USAGE_INITIATOR_SEAL; + } + + data = calloc(iov_count + 3, sizeof(data[0])); + if (data == NULL) { + *minor_status = ENOMEM; + major_status = GSS_S_FAILURE; + goto failure; + } + + if (token_flags & CFXSealed) { + size_t k5tsize, k5hsize; + + krb5_crypto_length(context, ctx->crypto, KRB5_CRYPTO_TYPE_HEADER, &k5hsize); + krb5_crypto_length(context, ctx->crypto, KRB5_CRYPTO_TYPE_TRAILER, &k5tsize); + + /* Rotate by RRC; bogus to do this in-place XXX */ + /* Check RRC */ + + if (trailer == NULL) { + size_t gsstsize = k5tsize + sizeof(*token); + size_t gsshsize = k5hsize + sizeof(*token); + + if (rrc != gsstsize) { + major_status = GSS_S_DEFECTIVE_TOKEN; + goto failure; + } + + if (IS_DCE_STYLE(ctx)) + gsstsize += ec; + + gsshsize += gsstsize; + + if (header->buffer.length != gsshsize) { + major_status = GSS_S_DEFECTIVE_TOKEN; + goto failure; + } + } else if (trailer->buffer.length != sizeof(*token) + k5tsize) { + major_status = GSS_S_DEFECTIVE_TOKEN; + goto failure; + } else if (header->buffer.length != sizeof(*token) + k5hsize) { + major_status = GSS_S_DEFECTIVE_TOKEN; + goto failure; + } else if (rrc != 0) { + /* go though slowpath */ + major_status = unrotate_iov(minor_status, rrc, iov, iov_count); + if (major_status) + goto failure; + } + + i = 0; + data[i].flags = KRB5_CRYPTO_TYPE_HEADER; + data[i].data.data = ((uint8_t *)header->buffer.value) + header->buffer.length - k5hsize; + data[i].data.length = k5hsize; + i++; + + for (j = 0; j < iov_count; i++, j++) { + switch (GSS_IOV_BUFFER_TYPE(iov[j].type)) { + case GSS_IOV_BUFFER_TYPE_DATA: + data[i].flags = KRB5_CRYPTO_TYPE_DATA; + break; + case GSS_IOV_BUFFER_TYPE_SIGN_ONLY: + data[i].flags = KRB5_CRYPTO_TYPE_SIGN_ONLY; + break; + default: + data[i].flags = KRB5_CRYPTO_TYPE_EMPTY; + break; + } + data[i].data.length = iov[j].buffer.length; + data[i].data.data = iov[j].buffer.value; + } + + /* encrypted CFX header in trailer (or after the header if in + DCE mode). Copy in header into E"header" + */ + data[i].flags = KRB5_CRYPTO_TYPE_DATA; + if (trailer) { + data[i].data.data = trailer->buffer.value; + } else { + data[i].data.data = ((uint8_t *)header->buffer.value) + + header->buffer.length - k5hsize - k5tsize - ec- sizeof(*token); + } + + data[i].data.length = ec + sizeof(*token); + ttoken = (gss_cfx_wrap_token)(((uint8_t *)data[i].data.data) + ec); + i++; + + /* Kerberos trailer comes after the gss trailer */ + data[i].flags = KRB5_CRYPTO_TYPE_TRAILER; + data[i].data.data = ((uint8_t *)data[i-1].data.data) + ec + sizeof(*token); + data[i].data.length = k5tsize; + i++; + + ret = krb5_decrypt_iov_ivec(context, ctx->crypto, usage, data, i, NULL); + if (ret != 0) { + *minor_status = ret; + major_status = GSS_S_FAILURE; + goto failure; + } + + ttoken->RRC[0] = token->RRC[0]; + ttoken->RRC[1] = token->RRC[1]; + + /* Check the integrity of the header */ + if (ct_memcmp(ttoken, token, sizeof(*token)) != 0) { + major_status = GSS_S_BAD_MIC; + goto failure; + } + } else { + size_t gsstsize = ec; + size_t gsshsize = sizeof(*token); + + if (trailer == NULL) { + /* Check RRC */ + if (rrc != gsstsize) { + *minor_status = EINVAL; + major_status = GSS_S_FAILURE; + goto failure; + } + + gsshsize += gsstsize; + gsstsize = 0; + } else if (trailer->buffer.length != gsstsize) { + major_status = GSS_S_DEFECTIVE_TOKEN; + goto failure; + } else if (rrc != 0) { + /* Check RRC */ + *minor_status = EINVAL; + major_status = GSS_S_FAILURE; + goto failure; + } + + if (header->buffer.length != gsshsize) { + major_status = GSS_S_DEFECTIVE_TOKEN; + goto failure; + } + + for (i = 0; i < iov_count; i++) { + switch (GSS_IOV_BUFFER_TYPE(iov[i].type)) { + case GSS_IOV_BUFFER_TYPE_DATA: + data[i].flags = KRB5_CRYPTO_TYPE_DATA; + break; + case GSS_IOV_BUFFER_TYPE_SIGN_ONLY: + data[i].flags = KRB5_CRYPTO_TYPE_SIGN_ONLY; + break; + default: + data[i].flags = KRB5_CRYPTO_TYPE_EMPTY; + break; + } + data[i].data.length = iov[i].buffer.length; + data[i].data.data = iov[i].buffer.value; + } + + data[i].flags = KRB5_CRYPTO_TYPE_DATA; + data[i].data.data = header->buffer.value; + data[i].data.length = sizeof(*token); + i++; + + data[i].flags = KRB5_CRYPTO_TYPE_CHECKSUM; + if (trailer) { + data[i].data.data = trailer->buffer.value; + } else { + data[i].data.data = (uint8_t *)header->buffer.value + + sizeof(*token); + } + data[i].data.length = ec; + i++; + + token = (gss_cfx_wrap_token)header->buffer.value; + token->EC[0] = 0; + token->EC[1] = 0; + token->RRC[0] = 0; + token->RRC[1] = 0; + + ret = krb5_verify_checksum_iov(context, ctx->crypto, usage, data, i, NULL); + if (ret) { + *minor_status = ret; + major_status = GSS_S_FAILURE; + goto failure; + } + } + + if (qop_state != NULL) { + *qop_state = GSS_C_QOP_DEFAULT; + } + + free(data); + + *minor_status = 0; + return GSS_S_COMPLETE; + + failure: + if (data) + free(data); + + gss_release_iov_buffer(&junk, iov, iov_count); + + return major_status; +} + +OM_uint32 +_gssapi_wrap_iov_length_cfx(OM_uint32 *minor_status, + gsskrb5_ctx ctx, + krb5_context context, + int conf_req_flag, + gss_qop_t qop_req, + int *conf_state, + gss_iov_buffer_desc *iov, + int iov_count) +{ + OM_uint32 major_status; + size_t size; + int i; + gss_iov_buffer_desc *header = NULL; + gss_iov_buffer_desc *padding = NULL; + gss_iov_buffer_desc *trailer = NULL; + size_t gsshsize = 0; + size_t gsstsize = 0; + size_t k5hsize = 0; + size_t k5tsize = 0; + + GSSAPI_KRB5_INIT (&context); + *minor_status = 0; + + for (size = 0, i = 0; i < iov_count; i++) { + switch(GSS_IOV_BUFFER_TYPE(iov[i].type)) { + case GSS_IOV_BUFFER_TYPE_EMPTY: + break; + case GSS_IOV_BUFFER_TYPE_DATA: + size += iov[i].buffer.length; + break; + case GSS_IOV_BUFFER_TYPE_HEADER: + if (header != NULL) { + *minor_status = 0; + return GSS_S_FAILURE; + } + header = &iov[i]; + break; + case GSS_IOV_BUFFER_TYPE_TRAILER: + if (trailer != NULL) { + *minor_status = 0; + return GSS_S_FAILURE; + } + trailer = &iov[i]; + break; + case GSS_IOV_BUFFER_TYPE_PADDING: + if (padding != NULL) { + *minor_status = 0; + return GSS_S_FAILURE; + } + padding = &iov[i]; + break; + case GSS_IOV_BUFFER_TYPE_SIGN_ONLY: + break; + default: + *minor_status = EINVAL; + return GSS_S_FAILURE; + } + } + + major_status = _gk_verify_buffers(minor_status, ctx, header, padding, trailer); + if (major_status != GSS_S_COMPLETE) { + return major_status; + } + + if (conf_req_flag) { + size_t k5psize = 0; + size_t k5pbase = 0; + size_t k5bsize = 0; + size_t ec = 0; + + size += sizeof(gss_cfx_wrap_token_desc); + + *minor_status = krb5_crypto_length(context, ctx->crypto, + KRB5_CRYPTO_TYPE_HEADER, + &k5hsize); + if (*minor_status) + return GSS_S_FAILURE; + + *minor_status = krb5_crypto_length(context, ctx->crypto, + KRB5_CRYPTO_TYPE_TRAILER, + &k5tsize); + if (*minor_status) + return GSS_S_FAILURE; + + *minor_status = krb5_crypto_length(context, ctx->crypto, + KRB5_CRYPTO_TYPE_PADDING, + &k5pbase); + if (*minor_status) + return GSS_S_FAILURE; + + if (k5pbase > 1) { + k5psize = k5pbase - (size % k5pbase); + } else { + k5psize = 0; + } + + if (k5psize == 0 && IS_DCE_STYLE(ctx)) { + *minor_status = krb5_crypto_getblocksize(context, ctx->crypto, + &k5bsize); + if (*minor_status) + return GSS_S_FAILURE; + + ec = k5bsize; + } else { + ec = k5psize; + } + + gsshsize = sizeof(gss_cfx_wrap_token_desc) + k5hsize; + gsstsize = sizeof(gss_cfx_wrap_token_desc) + ec + k5tsize; + } else { + *minor_status = krb5_crypto_length(context, ctx->crypto, + KRB5_CRYPTO_TYPE_CHECKSUM, + &k5tsize); + if (*minor_status) + return GSS_S_FAILURE; + + gsshsize = sizeof(gss_cfx_wrap_token_desc); + gsstsize = k5tsize; + } + + if (trailer != NULL) { + trailer->buffer.length = gsstsize; + } else { + gsshsize += gsstsize; + } + + header->buffer.length = gsshsize; + + if (padding) { + /* padding is done via EC and is contained in the header or trailer */ + padding->buffer.length = 0; + } + + if (conf_state) { + *conf_state = conf_req_flag; + } + + return GSS_S_COMPLETE; +} + + + + OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status, - const gsskrb5_ctx context_handle, + const gsskrb5_ctx ctx, krb5_context context, int conf_req_flag, - gss_qop_t qop_req, const gss_buffer_t input_message_buffer, int *conf_state, - gss_buffer_t output_message_buffer, - krb5_keyblock *key) + gss_buffer_t output_message_buffer) { - krb5_crypto crypto; gss_cfx_wrap_token token; krb5_error_code ret; unsigned usage; @@ -252,19 +1170,13 @@ OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status, int32_t seq_number; u_char *p; - ret = krb5_crypto_init(context, key, 0, &crypto); - if (ret != 0) { - *minor_status = ret; - return GSS_S_FAILURE; - } - ret = _gsskrb5cfx_wrap_length_cfx(context, - crypto, conf_req_flag, + ctx->crypto, conf_req_flag, + IS_DCE_STYLE(ctx), input_message_buffer->length, &wrapped_len, &cksumsize, &padlength); if (ret != 0) { *minor_status = ret; - krb5_crypto_destroy(context, crypto); return GSS_S_FAILURE; } @@ -275,7 +1187,6 @@ OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status, output_message_buffer->value = malloc(output_message_buffer->length); if (output_message_buffer->value == NULL) { *minor_status = ENOMEM; - krb5_crypto_destroy(context, crypto); return GSS_S_FAILURE; } @@ -285,9 +1196,9 @@ OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status, token->TOK_ID[1] = 0x04; token->Flags = 0; token->Filler = 0xFF; - if ((context_handle->more_flags & LOCAL) == 0) + if ((ctx->more_flags & LOCAL) == 0) token->Flags |= CFXSentByAcceptor; - if (context_handle->more_flags & ACCEPTOR_SUBKEY) + if (ctx->more_flags & ACCEPTOR_SUBKEY) token->Flags |= CFXAcceptorSubkey; if (conf_req_flag) { /* @@ -324,16 +1235,16 @@ OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status, token->RRC[0] = 0; token->RRC[1] = 0; - HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex); + HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex); krb5_auth_con_getlocalseqnumber(context, - context_handle->auth_context, + ctx->auth_context, &seq_number); _gsskrb5_encode_be_om_uint32(0, &token->SND_SEQ[0]); _gsskrb5_encode_be_om_uint32(seq_number, &token->SND_SEQ[4]); krb5_auth_con_setlocalseqnumber(context, - context_handle->auth_context, + ctx->auth_context, ++seq_number); - HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex); + HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex); /* * If confidentiality is requested, the token header is @@ -344,7 +1255,7 @@ OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status, * calculated over the plaintext concatenated with the * token header. */ - if (context_handle->more_flags & LOCAL) { + if (ctx->more_flags & LOCAL) { usage = KRB5_KU_USAGE_INITIATOR_SEAL; } else { usage = KRB5_KU_USAGE_ACCEPTOR_SEAL; @@ -365,25 +1276,31 @@ OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status, memcpy(p + input_message_buffer->length + padlength, token, sizeof(*token)); - ret = krb5_encrypt(context, crypto, + ret = krb5_encrypt(context, ctx->crypto, usage, p, input_message_buffer->length + padlength + sizeof(*token), &cipher); if (ret != 0) { *minor_status = ret; - krb5_crypto_destroy(context, crypto); _gsskrb5_release_buffer(minor_status, output_message_buffer); return GSS_S_FAILURE; } assert(sizeof(*token) + cipher.length == wrapped_len); - token->RRC[0] = (rrc >> 8) & 0xFF; + token->RRC[0] = (rrc >> 8) & 0xFF; token->RRC[1] = (rrc >> 0) & 0xFF; - ret = rrc_rotate(cipher.data, cipher.length, rrc, FALSE); + /* + * this is really ugly, but needed against windows + * for DCERPC, as windows rotates by EC+RRC. + */ + if (IS_DCE_STYLE(ctx)) { + ret = rrc_rotate(cipher.data, cipher.length, rrc+padlength, FALSE); + } else { + ret = rrc_rotate(cipher.data, cipher.length, rrc, FALSE); + } if (ret != 0) { *minor_status = ret; - krb5_crypto_destroy(context, crypto); _gsskrb5_release_buffer(minor_status, output_message_buffer); return GSS_S_FAILURE; } @@ -396,21 +1313,19 @@ OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status, buf = malloc(input_message_buffer->length + sizeof(*token)); if (buf == NULL) { *minor_status = ENOMEM; - krb5_crypto_destroy(context, crypto); _gsskrb5_release_buffer(minor_status, output_message_buffer); return GSS_S_FAILURE; } memcpy(buf, input_message_buffer->value, input_message_buffer->length); memcpy(buf + input_message_buffer->length, token, sizeof(*token)); - ret = krb5_create_checksum(context, crypto, - usage, 0, buf, + ret = krb5_create_checksum(context, ctx->crypto, + usage, 0, buf, input_message_buffer->length + - sizeof(*token), + sizeof(*token), &cksum); if (ret != 0) { *minor_status = ret; - krb5_crypto_destroy(context, crypto); _gsskrb5_release_buffer(minor_status, output_message_buffer); free(buf); return GSS_S_FAILURE; @@ -421,7 +1336,7 @@ OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status, assert(cksum.checksum.length == cksumsize); token->EC[0] = (cksum.checksum.length >> 8) & 0xFF; token->EC[1] = (cksum.checksum.length >> 0) & 0xFF; - token->RRC[0] = (rrc >> 8) & 0xFF; + token->RRC[0] = (rrc >> 8) & 0xFF; token->RRC[1] = (rrc >> 0) & 0xFF; p += sizeof(*token); @@ -433,7 +1348,6 @@ OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status, input_message_buffer->length + cksum.checksum.length, rrc, FALSE); if (ret != 0) { *minor_status = ret; - krb5_crypto_destroy(context, crypto); _gsskrb5_release_buffer(minor_status, output_message_buffer); free_Checksum(&cksum); return GSS_S_FAILURE; @@ -441,8 +1355,6 @@ OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status, free_Checksum(&cksum); } - krb5_crypto_destroy(context, crypto); - if (conf_state != NULL) { *conf_state = conf_req_flag; } @@ -452,15 +1364,13 @@ OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status, } OM_uint32 _gssapi_unwrap_cfx(OM_uint32 *minor_status, - const gsskrb5_ctx context_handle, + const gsskrb5_ctx ctx, krb5_context context, const gss_buffer_t input_message_buffer, gss_buffer_t output_message_buffer, int *conf_state, - gss_qop_t *qop_state, - krb5_keyblock *key) + gss_qop_t *qop_state) { - krb5_crypto crypto; gss_cfx_wrap_token token; u_char token_flags; krb5_error_code ret; @@ -490,11 +1400,11 @@ OM_uint32 _gssapi_unwrap_cfx(OM_uint32 *minor_status, (CFXSentByAcceptor | CFXSealed | CFXAcceptorSubkey); if (token_flags & CFXSentByAcceptor) { - if ((context_handle->more_flags & LOCAL) == 0) + if ((ctx->more_flags & LOCAL) == 0) return GSS_S_DEFECTIVE_TOKEN; } - if (context_handle->more_flags & ACCEPTOR_SUBKEY) { + if (ctx->more_flags & ACCEPTOR_SUBKEY) { if ((token_flags & CFXAcceptorSubkey) == 0) return GSS_S_DEFECTIVE_TOKEN; } else { @@ -524,26 +1434,21 @@ OM_uint32 _gssapi_unwrap_cfx(OM_uint32 *minor_status, return GSS_S_UNSEQ_TOKEN; } - HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex); - ret = _gssapi_msg_order_check(context_handle->order, seq_number_lo); + HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex); + ret = _gssapi_msg_order_check(ctx->order, seq_number_lo); if (ret != 0) { *minor_status = 0; - HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex); + HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex); _gsskrb5_release_buffer(minor_status, output_message_buffer); return ret; } - HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex); + HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex); /* * Decrypt and/or verify checksum */ - ret = krb5_crypto_init(context, key, 0, &crypto); - if (ret != 0) { - *minor_status = ret; - return GSS_S_FAILURE; - } - if (context_handle->more_flags & LOCAL) { + if (ctx->more_flags & LOCAL) { usage = KRB5_KU_USAGE_ACCEPTOR_SEAL; } else { usage = KRB5_KU_USAGE_INITIATOR_SEAL; @@ -553,25 +1458,29 @@ OM_uint32 _gssapi_unwrap_cfx(OM_uint32 *minor_status, len = input_message_buffer->length; len -= (p - (u_char *)input_message_buffer->value); - /* Rotate by RRC; bogus to do this in-place XXX */ - *minor_status = rrc_rotate(p, len, rrc, TRUE); - if (*minor_status != 0) { - krb5_crypto_destroy(context, crypto); - return GSS_S_FAILURE; - } - if (token_flags & CFXSealed) { - ret = krb5_decrypt(context, crypto, usage, + /* + * this is really ugly, but needed against windows + * for DCERPC, as windows rotates by EC+RRC. + */ + if (IS_DCE_STYLE(ctx)) { + *minor_status = rrc_rotate(p, len, rrc+ec, TRUE); + } else { + *minor_status = rrc_rotate(p, len, rrc, TRUE); + } + if (*minor_status != 0) { + return GSS_S_FAILURE; + } + + ret = krb5_decrypt(context, ctx->crypto, usage, p, len, &data); if (ret != 0) { *minor_status = ret; - krb5_crypto_destroy(context, crypto); return GSS_S_BAD_MIC; } /* Check that there is room for the pad and token header */ if (data.length < ec + sizeof(*token)) { - krb5_crypto_destroy(context, crypto); krb5_data_free(&data); return GSS_S_DEFECTIVE_TOKEN; } @@ -583,8 +1492,7 @@ OM_uint32 _gssapi_unwrap_cfx(OM_uint32 *minor_status, ((gss_cfx_wrap_token)p)->RRC[1] = token->RRC[1]; /* Check the integrity of the header */ - if (memcmp(p, token, sizeof(*token)) != 0) { - krb5_crypto_destroy(context, crypto); + if (ct_memcmp(p, token, sizeof(*token)) != 0) { krb5_data_free(&data); return GSS_S_BAD_MIC; } @@ -594,12 +1502,18 @@ OM_uint32 _gssapi_unwrap_cfx(OM_uint32 *minor_status, } else { Checksum cksum; + /* Rotate by RRC; bogus to do this in-place XXX */ + *minor_status = rrc_rotate(p, len, rrc, TRUE); + if (*minor_status != 0) { + return GSS_S_FAILURE; + } + /* Determine checksum type */ ret = krb5_crypto_get_checksum_type(context, - crypto, &cksum.cksumtype); + ctx->crypto, + &cksum.cksumtype); if (ret != 0) { *minor_status = ret; - krb5_crypto_destroy(context, crypto); return GSS_S_FAILURE; } @@ -608,7 +1522,6 @@ OM_uint32 _gssapi_unwrap_cfx(OM_uint32 *minor_status, /* Check we have at least as much data as the checksum */ if (len < cksum.checksum.length) { *minor_status = ERANGE; - krb5_crypto_destroy(context, crypto); return GSS_S_BAD_MIC; } @@ -620,13 +1533,12 @@ OM_uint32 _gssapi_unwrap_cfx(OM_uint32 *minor_status, output_message_buffer->value = malloc(len + sizeof(*token)); if (output_message_buffer->value == NULL) { *minor_status = ENOMEM; - krb5_crypto_destroy(context, crypto); return GSS_S_FAILURE; } /* Checksum is over (plaintext-data | "header") */ memcpy(output_message_buffer->value, p, len); - memcpy((u_char *)output_message_buffer->value + len, + memcpy((u_char *)output_message_buffer->value + len, token, sizeof(*token)); /* EC is not included in checksum calculation */ @@ -637,21 +1549,18 @@ OM_uint32 _gssapi_unwrap_cfx(OM_uint32 *minor_status, token->RRC[0] = 0; token->RRC[1] = 0; - ret = krb5_verify_checksum(context, crypto, + ret = krb5_verify_checksum(context, ctx->crypto, usage, output_message_buffer->value, len + sizeof(*token), &cksum); if (ret != 0) { *minor_status = ret; - krb5_crypto_destroy(context, crypto); _gsskrb5_release_buffer(minor_status, output_message_buffer); return GSS_S_BAD_MIC; } } - krb5_crypto_destroy(context, crypto); - if (qop_state != NULL) { *qop_state = GSS_C_QOP_DEFAULT; } @@ -661,14 +1570,12 @@ OM_uint32 _gssapi_unwrap_cfx(OM_uint32 *minor_status, } OM_uint32 _gssapi_mic_cfx(OM_uint32 *minor_status, - const gsskrb5_ctx context_handle, + const gsskrb5_ctx ctx, krb5_context context, gss_qop_t qop_req, const gss_buffer_t message_buffer, - gss_buffer_t message_token, - krb5_keyblock *key) + gss_buffer_t message_token) { - krb5_crypto crypto; gss_cfx_mic_token token; krb5_error_code ret; unsigned usage; @@ -677,17 +1584,10 @@ OM_uint32 _gssapi_mic_cfx(OM_uint32 *minor_status, size_t len; int32_t seq_number; - ret = krb5_crypto_init(context, key, 0, &crypto); - if (ret != 0) { - *minor_status = ret; - return GSS_S_FAILURE; - } - len = message_buffer->length + sizeof(*token); buf = malloc(len); if (buf == NULL) { *minor_status = ENOMEM; - krb5_crypto_destroy(context, crypto); return GSS_S_FAILURE; } @@ -697,38 +1597,36 @@ OM_uint32 _gssapi_mic_cfx(OM_uint32 *minor_status, token->TOK_ID[0] = 0x04; token->TOK_ID[1] = 0x04; token->Flags = 0; - if ((context_handle->more_flags & LOCAL) == 0) + if ((ctx->more_flags & LOCAL) == 0) token->Flags |= CFXSentByAcceptor; - if (context_handle->more_flags & ACCEPTOR_SUBKEY) + if (ctx->more_flags & ACCEPTOR_SUBKEY) token->Flags |= CFXAcceptorSubkey; memset(token->Filler, 0xFF, 5); - HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex); + HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex); krb5_auth_con_getlocalseqnumber(context, - context_handle->auth_context, + ctx->auth_context, &seq_number); _gsskrb5_encode_be_om_uint32(0, &token->SND_SEQ[0]); _gsskrb5_encode_be_om_uint32(seq_number, &token->SND_SEQ[4]); krb5_auth_con_setlocalseqnumber(context, - context_handle->auth_context, + ctx->auth_context, ++seq_number); - HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex); + HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex); - if (context_handle->more_flags & LOCAL) { + if (ctx->more_flags & LOCAL) { usage = KRB5_KU_USAGE_INITIATOR_SIGN; } else { usage = KRB5_KU_USAGE_ACCEPTOR_SIGN; } - ret = krb5_create_checksum(context, crypto, + ret = krb5_create_checksum(context, ctx->crypto, usage, 0, buf, len, &cksum); if (ret != 0) { *minor_status = ret; - krb5_crypto_destroy(context, crypto); free(buf); return GSS_S_FAILURE; } - krb5_crypto_destroy(context, crypto); /* Determine MIC length */ message_token->length = sizeof(*token) + cksum.checksum.length; @@ -753,14 +1651,12 @@ OM_uint32 _gssapi_mic_cfx(OM_uint32 *minor_status, } OM_uint32 _gssapi_verify_mic_cfx(OM_uint32 *minor_status, - const gsskrb5_ctx context_handle, + const gsskrb5_ctx ctx, krb5_context context, const gss_buffer_t message_buffer, const gss_buffer_t token_buffer, - gss_qop_t *qop_state, - krb5_keyblock *key) + gss_qop_t *qop_state) { - krb5_crypto crypto; gss_cfx_mic_token token; u_char token_flags; krb5_error_code ret; @@ -787,10 +1683,10 @@ OM_uint32 _gssapi_verify_mic_cfx(OM_uint32 *minor_status, token_flags = token->Flags & (CFXSentByAcceptor | CFXAcceptorSubkey); if (token_flags & CFXSentByAcceptor) { - if ((context_handle->more_flags & LOCAL) == 0) + if ((ctx->more_flags & LOCAL) == 0) return GSS_S_DEFECTIVE_TOKEN; } - if (context_handle->more_flags & ACCEPTOR_SUBKEY) { + if (ctx->more_flags & ACCEPTOR_SUBKEY) { if ((token_flags & CFXAcceptorSubkey) == 0) return GSS_S_DEFECTIVE_TOKEN; } else { @@ -798,7 +1694,7 @@ OM_uint32 _gssapi_verify_mic_cfx(OM_uint32 *minor_status, return GSS_S_DEFECTIVE_TOKEN; } - if (memcmp(token->Filler, "\xff\xff\xff\xff\xff", 5) != 0) { + if (ct_memcmp(token->Filler, "\xff\xff\xff\xff\xff", 5) != 0) { return GSS_S_DEFECTIVE_TOKEN; } @@ -812,36 +1708,29 @@ OM_uint32 _gssapi_verify_mic_cfx(OM_uint32 *minor_status, return GSS_S_UNSEQ_TOKEN; } - HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex); - ret = _gssapi_msg_order_check(context_handle->order, seq_number_lo); + HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex); + ret = _gssapi_msg_order_check(ctx->order, seq_number_lo); if (ret != 0) { *minor_status = 0; - HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex); + HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex); return ret; } - HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex); + HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex); /* * Verify checksum */ - ret = krb5_crypto_init(context, key, 0, &crypto); - if (ret != 0) { - *minor_status = ret; - return GSS_S_FAILURE; - } - - ret = krb5_crypto_get_checksum_type(context, crypto, + ret = krb5_crypto_get_checksum_type(context, ctx->crypto, &cksum.cksumtype); if (ret != 0) { *minor_status = ret; - krb5_crypto_destroy(context, crypto); return GSS_S_FAILURE; } cksum.checksum.data = p + sizeof(*token); cksum.checksum.length = token_buffer->length - sizeof(*token); - if (context_handle->more_flags & LOCAL) { + if (ctx->more_flags & LOCAL) { usage = KRB5_KU_USAGE_ACCEPTOR_SIGN; } else { usage = KRB5_KU_USAGE_INITIATOR_SIGN; @@ -850,18 +1739,16 @@ OM_uint32 _gssapi_verify_mic_cfx(OM_uint32 *minor_status, buf = malloc(message_buffer->length + sizeof(*token)); if (buf == NULL) { *minor_status = ENOMEM; - krb5_crypto_destroy(context, crypto); return GSS_S_FAILURE; } memcpy(buf, message_buffer->value, message_buffer->length); memcpy(buf + message_buffer->length, token, sizeof(*token)); - ret = krb5_verify_checksum(context, crypto, + ret = krb5_verify_checksum(context, ctx->crypto, usage, buf, sizeof(*token) + message_buffer->length, &cksum); - krb5_crypto_destroy(context, crypto); if (ret != 0) { *minor_status = ret; free(buf); |