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118 lines
3.8 KiB
C
118 lines
3.8 KiB
C
#include "sasl_windows.h"
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static const LPSTR SSPI_PACKAGE_NAME = "kerberos";
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SECURITY_STATUS SEC_ENTRY sspi_acquire_credentials_handle(CredHandle *cred_handle, char *username, char *password, char *domain)
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{
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SEC_WINNT_AUTH_IDENTITY auth_identity;
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SECURITY_INTEGER ignored;
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auth_identity.Flags = SEC_WINNT_AUTH_IDENTITY_ANSI;
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auth_identity.User = (LPSTR) username;
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auth_identity.UserLength = strlen(username);
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auth_identity.Password = (LPSTR) password;
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auth_identity.PasswordLength = strlen(password);
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auth_identity.Domain = (LPSTR) domain;
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auth_identity.DomainLength = strlen(domain);
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return call_sspi_acquire_credentials_handle(NULL, SSPI_PACKAGE_NAME, SECPKG_CRED_OUTBOUND, NULL, &auth_identity, NULL, NULL, cred_handle, &ignored);
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}
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int sspi_step(CredHandle *cred_handle, int has_context, CtxtHandle *context, PVOID *buffer, ULONG *buffer_length, char *target)
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{
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SecBufferDesc inbuf;
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SecBuffer in_bufs[1];
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SecBufferDesc outbuf;
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SecBuffer out_bufs[1];
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if (has_context > 0) {
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// If we already have a context, we now have data to send.
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// Put this data in an inbuf.
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inbuf.ulVersion = SECBUFFER_VERSION;
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inbuf.cBuffers = 1;
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inbuf.pBuffers = in_bufs;
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in_bufs[0].pvBuffer = *buffer;
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in_bufs[0].cbBuffer = *buffer_length;
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in_bufs[0].BufferType = SECBUFFER_TOKEN;
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}
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outbuf.ulVersion = SECBUFFER_VERSION;
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outbuf.cBuffers = 1;
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outbuf.pBuffers = out_bufs;
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out_bufs[0].pvBuffer = NULL;
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out_bufs[0].cbBuffer = 0;
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out_bufs[0].BufferType = SECBUFFER_TOKEN;
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ULONG context_attr = 0;
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int ret = call_sspi_initialize_security_context(cred_handle,
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has_context > 0 ? context : NULL,
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(LPSTR) target,
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ISC_REQ_ALLOCATE_MEMORY | ISC_REQ_MUTUAL_AUTH,
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0,
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SECURITY_NETWORK_DREP,
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has_context > 0 ? &inbuf : NULL,
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0,
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context,
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&outbuf,
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&context_attr,
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NULL);
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*buffer = malloc(out_bufs[0].cbBuffer);
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*buffer_length = out_bufs[0].cbBuffer;
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memcpy(*buffer, out_bufs[0].pvBuffer, *buffer_length);
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return ret;
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}
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int sspi_send_client_authz_id(CtxtHandle *context, PVOID *buffer, ULONG *buffer_length, char *user_plus_realm)
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{
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SecPkgContext_Sizes sizes;
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SECURITY_STATUS status = call_sspi_query_context_attributes(context, SECPKG_ATTR_SIZES, &sizes);
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if (status != SEC_E_OK) {
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return status;
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}
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size_t user_plus_realm_length = strlen(user_plus_realm);
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int msgSize = 4 + user_plus_realm_length;
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char *msg = malloc((sizes.cbSecurityTrailer + msgSize + sizes.cbBlockSize) * sizeof(char));
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msg[sizes.cbSecurityTrailer + 0] = 1;
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msg[sizes.cbSecurityTrailer + 1] = 0;
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msg[sizes.cbSecurityTrailer + 2] = 0;
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msg[sizes.cbSecurityTrailer + 3] = 0;
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memcpy(&msg[sizes.cbSecurityTrailer + 4], user_plus_realm, user_plus_realm_length);
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SecBuffer wrapBufs[3];
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SecBufferDesc wrapBufDesc;
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wrapBufDesc.cBuffers = 3;
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wrapBufDesc.pBuffers = wrapBufs;
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wrapBufDesc.ulVersion = SECBUFFER_VERSION;
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wrapBufs[0].cbBuffer = sizes.cbSecurityTrailer;
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wrapBufs[0].BufferType = SECBUFFER_TOKEN;
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wrapBufs[0].pvBuffer = msg;
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wrapBufs[1].cbBuffer = msgSize;
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wrapBufs[1].BufferType = SECBUFFER_DATA;
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wrapBufs[1].pvBuffer = msg + sizes.cbSecurityTrailer;
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wrapBufs[2].cbBuffer = sizes.cbBlockSize;
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wrapBufs[2].BufferType = SECBUFFER_PADDING;
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wrapBufs[2].pvBuffer = msg + sizes.cbSecurityTrailer + msgSize;
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status = call_sspi_encrypt_message(context, SECQOP_WRAP_NO_ENCRYPT, &wrapBufDesc, 0);
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if (status != SEC_E_OK) {
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free(msg);
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return status;
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}
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*buffer_length = wrapBufs[0].cbBuffer + wrapBufs[1].cbBuffer + wrapBufs[2].cbBuffer;
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*buffer = malloc(*buffer_length);
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memcpy(*buffer, wrapBufs[0].pvBuffer, wrapBufs[0].cbBuffer);
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memcpy(*buffer + wrapBufs[0].cbBuffer, wrapBufs[1].pvBuffer, wrapBufs[1].cbBuffer);
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memcpy(*buffer + wrapBufs[0].cbBuffer + wrapBufs[1].cbBuffer, wrapBufs[2].pvBuffer, wrapBufs[2].cbBuffer);
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free(msg);
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return SEC_E_OK;
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}
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