Add support for specifying the parameters needed for capsule
generation through a config file, instead of passing them through
command-line. Parameters for more than a single capsule file can be
specified, resulting in generation of multiple capsules through a
single invocation of the command.

The config file can be passed to the mkeficapsule tool in such manner

 $ ./tools/mkeficapsule -f <path/to/the/config/file>

Signed-off-by: Sughosh Ganu <sughosh.g...@linaro.org>
---
 tools/Kconfig              |  15 ++
 tools/Makefile             |   1 +
 tools/eficapsule.h         | 114 ++++++++++++
 tools/mkeficapsule.c       |  87 +++++----
 tools/mkeficapsule_parse.c | 352 +++++++++++++++++++++++++++++++++++++
 5 files changed, 538 insertions(+), 31 deletions(-)
 create mode 100644 tools/mkeficapsule_parse.c

diff --git a/tools/Kconfig b/tools/Kconfig
index 667807b331..0362ca8e45 100644
--- a/tools/Kconfig
+++ b/tools/Kconfig
@@ -104,6 +104,21 @@ config TOOLS_MKEFICAPSULE
          optionally sign that file. If you want to enable UEFI capsule
          update feature on your target, you certainly need this.
 
+config EFI_CAPSULE_CFG_FILE
+       string "Path to the EFI Capsule Config File"
+       help
+         Path to the EFI capsule config file which provides the
+         parameters needed to build capsule(s). Parameters can be
+         provided for multiple payloads resulting in corresponding
+         capsule images being generated.
+
+config EFI_USE_CAPSULE_CFG_FILE
+       bool "Use the config file for generating capsules"
+       help
+         Boolean option used to specify if the EFI capsules are to
+         be generated through parameters specified via the config
+         file or through command line.
+
 menuconfig FSPI_CONF_HEADER
        bool "FlexSPI Header Configuration"
        help
diff --git a/tools/Makefile b/tools/Makefile
index 6a4280e366..4311f5914f 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -253,6 +253,7 @@ HOSTLDLIBS_mkeficapsule += \
 HOSTLDLIBS_mkeficapsule += \
        $(shell pkg-config --libs uuid 2> /dev/null || echo "-luuid")
 hostprogs-$(CONFIG_TOOLS_MKEFICAPSULE) += mkeficapsule
+mkeficapsule-objs := mkeficapsule.o mkeficapsule_parse.o
 
 mkfwumdata-objs := mkfwumdata.o generated/lib/crc32.o
 HOSTLDLIBS_mkfwumdata += -luuid
diff --git a/tools/eficapsule.h b/tools/eficapsule.h
index 6efd07d2eb..71a08b62e6 100644
--- a/tools/eficapsule.h
+++ b/tools/eficapsule.h
@@ -54,6 +54,12 @@ typedef struct {
 /* flags */
 #define CAPSULE_FLAGS_PERSIST_ACROSS_RESET      0x00010000
 
+enum capsule_type {
+       CAPSULE_NORMAL_BLOB = 0,
+       CAPSULE_ACCEPT,
+       CAPSULE_REVERT,
+};
+
 struct efi_capsule_header {
        efi_guid_t capsule_guid;
        uint32_t header_size;
@@ -145,4 +151,112 @@ struct fmp_payload_header_params {
        uint32_t fw_version;
 };
 
+/**
+ * struct efi_capsule_params - Capsule parameters
+ * @image_guid: Guid value of the payload input image
+ * @image_index: Image index value
+ * @hardware_instance: Hardware instance to be used for the image
+ * @fmp: FMP payload header used for storing firmware version
+ * @monotonic_count: Monotonic count value to be used for signed capsule
+ * @privkey_file: Path to private key used in capsule signing
+ * @cert_file: Path to public key certificate used in capsule signing
+ * @input_file: Path to payload input image
+ * @capsule_file: Path to the output capsule file
+ * @oemflags: Oemflags to be populated in the capsule header
+ * @capsule: Capsule Type, normal or accept or revert
+ */
+struct efi_capsule_params {
+       efi_guid_t *image_guid;
+       unsigned long image_index;
+       unsigned long hardware_instance;
+       struct fmp_payload_header_params fmp;
+       uint64_t monotonic_count;
+       char *privkey_file;
+       char *cert_file;
+       char *input_file;
+       char *capsule_file;
+       unsigned long oemflags;
+       enum capsule_type capsule;
+};
+
+/**
+ * capsule_with_cfg_file() - Generate capsule from config file
+ * @cfg_file: Path to the config file
+ *
+ * Parse the capsule parameters from the config file and use the
+ * parameters for generating one or more capsules.
+ *
+ * Return: None
+ *
+ */
+void capsule_with_cfg_file(const char *cfg_file);
+
+/**
+ * convert_uuid_to_guid() - convert UUID to GUID
+ * @buf:       UUID binary
+ *
+ * UUID and GUID have the same data structure, but their binary
+ * formats are different due to the endianness. See lib/uuid.c.
+ * Since uuid_parse() can handle only UUID, this function must
+ * be called to get correct data for GUID when parsing a string.
+ *
+ * The correct data will be returned in @buf.
+ */
+void convert_uuid_to_guid(unsigned char *buf);
+
+/**
+ * create_empty_capsule() - Generate an empty capsule
+ * @path: Path to the empty capsule file to be generated
+ * @guid: Guid value of the image for which empty capsule is generated
+ * @fw_accept: Flag to specify whether to generate accept or revert capsule
+ *
+ * Generate an empty capsule, either an accept or a revert capsule to be
+ * used to flag acceptance or rejection of an earlier executed firmware
+ * update operation. Being used in the FWU Multi Bank firmware update
+ * feature.
+ *
+ * Return: 0 if OK, -ve on error
+ *
+ */
+int create_empty_capsule(char *path, efi_guid_t *guid, bool fw_accept);
+
+/**
+ * create_fwbin - create an uefi capsule file
+ * @path:      Path to a created capsule file
+ * @bin:       Path to a firmware binary to encapsulate
+ * @guid:      GUID of related FMP driver
+ * @index:     Index number in capsule
+ * @instance:  Instance number in capsule
+ * @fmp:       FMP header params
+ * @mcount:    Monotonic count in authentication information
+ * @private_file:      Path to a private key file
+ * @cert_file: Path to a certificate file
+ * @oemflags:  Capsule OEM Flags, bits 0-15
+ *
+ * This function actually does the job of creating an uefi capsule file.
+ * All the arguments must be supplied.
+ * If either @private_file ror @cert_file is NULL, the capsule file
+ * won't be signed.
+ *
+ * Return:
+ * * 0  - on success
+ * * -1 - on failure
+ */
+int create_fwbin(char *path, char *bin, efi_guid_t *guid,
+                unsigned long index, unsigned long instance,
+                struct fmp_payload_header_params *fmp_ph_params,
+                uint64_t mcount, char *privkey_file, char *cert_file,
+                uint16_t oemflags);
+
+/**
+ * print_usage() - Print the command usage string
+ *
+ * Prints the standard command usage string. Called in the case
+ * of incorrect parameters being passed to the tool.
+ *
+ * Return: None
+ *
+ */
+void print_usage(void);
+
 #endif /* _EFI_CAPSULE_H */
diff --git a/tools/mkeficapsule.c b/tools/mkeficapsule.c
index 6a261ff549..480cedfa5e 100644
--- a/tools/mkeficapsule.c
+++ b/tools/mkeficapsule.c
@@ -28,13 +28,7 @@ static const char *tool_name = "mkeficapsule";
 efi_guid_t efi_guid_fm_capsule = EFI_FIRMWARE_MANAGEMENT_CAPSULE_ID_GUID;
 efi_guid_t efi_guid_cert_type_pkcs7 = EFI_CERT_TYPE_PKCS7_GUID;
 
-static const char *opts_short = "g:i:I:v:p:c:m:o:dhARD";
-
-enum {
-       CAPSULE_NORMAL_BLOB = 0,
-       CAPSULE_ACCEPT,
-       CAPSULE_REVERT,
-} capsule_type;
+static const char *opts_short = "g:i:I:v:p:c:m:o:f:dhARD";
 
 static struct option options[] = {
        {"guid", required_argument, NULL, 'g'},
@@ -49,11 +43,21 @@ static struct option options[] = {
        {"fw-revert", no_argument, NULL, 'R'},
        {"capoemflag", required_argument, NULL, 'o'},
        {"dump-capsule", no_argument, NULL, 'D'},
+       {"cfg-file", required_argument, NULL, 'f'},
        {"help", no_argument, NULL, 'h'},
        {NULL, 0, NULL, 0},
 };
 
-static void print_usage(void)
+/**
+ * print_usage() - Print the command usage string
+ *
+ * Prints the standard command usage string. Called in the case
+ * of incorrect parameters being passed to the tool.
+ *
+ * Return: None
+ *
+ */
+void print_usage(void)
 {
        fprintf(stderr, "Usage: %s [options] <image blob> <output file>\n"
                "Options:\n"
@@ -70,6 +74,7 @@ static void print_usage(void)
                "\t-R, --fw-revert  firmware revert capsule, takes no GUID, no 
image blob\n"
                "\t-o, --capoemflag Capsule OEM Flag, an integer between 0x0000 
and 0xffff\n"
                "\t-D, --dump-capsule          dump the contents of the capsule 
headers\n"
+               "\t-f, --cfg-file <config file> config file with capsule 
parameters\n"
                "\t-h, --help                  print a help message\n",
                tool_name);
 }
@@ -389,6 +394,7 @@ static void free_sig_data(struct auth_context *ctx)
  * @guid:      GUID of related FMP driver
  * @index:     Index number in capsule
  * @instance:  Instance number in capsule
+ * @fmp:       FMP header params
  * @mcount:    Monotonic count in authentication information
  * @private_file:      Path to a private key file
  * @cert_file: Path to a certificate file
@@ -403,11 +409,11 @@ static void free_sig_data(struct auth_context *ctx)
  * * 0  - on success
  * * -1 - on failure
  */
-static int create_fwbin(char *path, char *bin, efi_guid_t *guid,
-                       unsigned long index, unsigned long instance,
-                       struct fmp_payload_header_params *fmp_ph_params,
-                       uint64_t mcount, char *privkey_file, char *cert_file,
-                       uint16_t oemflags)
+int create_fwbin(char *path, char *bin, efi_guid_t *guid,
+                unsigned long index, unsigned long instance,
+                struct fmp_payload_header_params *fmp_ph_params,
+                uint64_t mcount, char *privkey_file, char *cert_file,
+                uint16_t oemflags)
 {
        struct efi_capsule_header header;
        struct efi_firmware_management_capsule_header capsule;
@@ -605,7 +611,21 @@ void convert_uuid_to_guid(unsigned char *buf)
        buf[7] = c;
 }
 
-static int create_empty_capsule(char *path, efi_guid_t *guid, bool fw_accept)
+/**
+ * create_empty_capsule() - Generate an empty capsule
+ * @path: Path to the empty capsule file to be generated
+ * @guid: Guid value of the image for which empty capsule is generated
+ * @fw_accept: Flag to specify whether to generate accept or revert capsule
+ *
+ * Generate an empty capsule, either an accept or a revert capsule to be
+ * used to flag acceptance or rejection of an earlier executed firmware
+ * update operation. Being used in the FWU Multi Bank firmware update
+ * feature.
+ *
+ * Return: 0 if OK, -ve on error
+ *
+ */
+int create_empty_capsule(char *path, efi_guid_t *guid, bool fw_accept)
 {
        struct efi_capsule_header header = { 0 };
        FILE *f = NULL;
@@ -878,6 +898,8 @@ int main(int argc, char **argv)
        unsigned long oemflags;
        bool capsule_dump;
        char *privkey_file, *cert_file;
+       char *cfg_file;
+       enum capsule_type capsule;
        int c, idx;
        struct fmp_payload_header_params fmp_ph_params = { 0 };
 
@@ -888,8 +910,9 @@ int main(int argc, char **argv)
        privkey_file = NULL;
        cert_file = NULL;
        capsule_dump = false;
+       cfg_file = NULL;
        dump_sig = 0;
-       capsule_type = CAPSULE_NORMAL_BLOB;
+       capsule = CAPSULE_NORMAL_BLOB;
        oemflags = 0;
        for (;;) {
                c = getopt_long(argc, argv, opts_short, options, &idx);
@@ -943,20 +966,20 @@ int main(int argc, char **argv)
                        dump_sig = 1;
                        break;
                case 'A':
-                       if (capsule_type) {
+                       if (capsule) {
                                fprintf(stderr,
                                        "Select either of Accept or Revert 
capsule generation\n");
                                exit(1);
                        }
-                       capsule_type = CAPSULE_ACCEPT;
+                       capsule = CAPSULE_ACCEPT;
                        break;
                case 'R':
-                       if (capsule_type) {
+                       if (capsule) {
                                fprintf(stderr,
                                        "Select either of Accept or Revert 
capsule generation\n");
                                exit(1);
                        }
-                       capsule_type = CAPSULE_REVERT;
+                       capsule = CAPSULE_REVERT;
                        break;
                case 'o':
                        oemflags = strtoul(optarg, NULL, 0);
@@ -969,6 +992,10 @@ int main(int argc, char **argv)
                case 'D':
                        capsule_dump = true;
                        break;
+               case 'f':
+                       cfg_file = optarg;
+                       capsule_with_cfg_file(cfg_file);
+                       exit(EXIT_SUCCESS);
                default:
                        print_usage();
                        exit(EXIT_SUCCESS);
@@ -985,21 +1012,21 @@ int main(int argc, char **argv)
        }
 
        /* check necessary parameters */
-       if ((capsule_type == CAPSULE_NORMAL_BLOB &&
-           ((argc != optind + 2) || !guid ||
-            ((privkey_file && !cert_file) ||
-             (!privkey_file && cert_file)))) ||
-           (capsule_type != CAPSULE_NORMAL_BLOB &&
-           ((argc != optind + 1) ||
-            ((capsule_type == CAPSULE_ACCEPT) && !guid) ||
-            ((capsule_type == CAPSULE_REVERT) && guid)))) {
+       if ((capsule == CAPSULE_NORMAL_BLOB &&
+            ((argc != optind + 2) || !guid ||
+             ((privkey_file && !cert_file) ||
+              (!privkey_file && cert_file)))) ||
+           (capsule != CAPSULE_NORMAL_BLOB &&
+            ((argc != optind + 1) ||
+             (capsule == CAPSULE_ACCEPT && !guid) ||
+             (capsule == CAPSULE_REVERT && guid)))) {
                print_usage();
                exit(EXIT_FAILURE);
        }
 
-       if (capsule_type != CAPSULE_NORMAL_BLOB) {
+       if (capsule != CAPSULE_NORMAL_BLOB) {
                if (create_empty_capsule(argv[argc - 1], guid,
-                                        capsule_type == CAPSULE_ACCEPT) < 0) {
+                                        capsule == CAPSULE_ACCEPT) < 0) {
                        fprintf(stderr, "Creating empty capsule failed\n");
                        exit(EXIT_FAILURE);
                }
@@ -1009,6 +1036,4 @@ int main(int argc, char **argv)
                fprintf(stderr, "Creating firmware capsule failed\n");
                exit(EXIT_FAILURE);
        }
-
-       exit(EXIT_SUCCESS);
 }
diff --git a/tools/mkeficapsule_parse.c b/tools/mkeficapsule_parse.c
new file mode 100644
index 0000000000..0b010706d5
--- /dev/null
+++ b/tools/mkeficapsule_parse.c
@@ -0,0 +1,352 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2023 Linaro Limited
+ */
+
+/*
+ * The code in this file adds parsing ability to the mkeficapsule
+ * tool. This allows specifying parameters needed to build the capsule
+ * through the config file instead of specifying them on the command-line.
+ * Parameters can be specified for more than one payload, generating the
+ * corresponding capsule files.
+ *
+ * The parameters are specified in a "key:value" pair. All the parameters
+ * that are currently supported by the mkeficapsule tool can be specified
+ * in the config file.
+ *
+ * The example below shows four payloads. The first payload is an example
+ * of generating a signed capsule. The second payload is an example of
+ * generating an unsigned capsule. The third payload is an accept empty
+ * capsule, while the fourth payload is the revert empty capsule, used
+ * for the multi-bank firmware update feature.
+ *
+ * This functionality can be easily extended to generate a single capsule
+ * comprising multiple payloads.
+
+       {
+           image-guid: 02f4d760-cfd5-43bd-8e2d-a42acb33c660
+           hardware-instance: 0
+           monotonic-count: 1
+           payload: u-boot.bin
+           fw-version: 2
+           image-index: 1
+           private-key: /path/to/priv/key
+           pub-key-cert: /path/to/pub/key
+           capsule: u-boot.capsule
+       }
+       {
+           image-guid: 4ce292da-1dd8-428d-a1c2-77743ef8b96e
+           hardware-instance: 0
+           payload: u-boot.itb
+           image-index: 2
+           fw-version: 10
+           oemflags: 0x8000
+           capsule: fit.capsule
+       }
+       {
+           capsule-type: accept
+           image-guid: 4ce292da-1dd8-428d-a1c2-77743ef8b96e
+           capsule: accept.capsule
+       }
+       {
+           capsule-type: revert
+           capsule: revert.capsule
+       }
+*/
+
+#include <ctype.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <uuid/uuid.h>
+
+#include "eficapsule.h"
+
+#define PARAMS_START   "{"
+#define PARAMS_END     "}"
+
+#define PSTART         2
+#define PEND           3
+
+#define MALLOC_FAIL_STR                "Unable to allocate memory\n"
+
+#define ARRAY_SIZE(x)          (sizeof(x) / sizeof((x)[0]))
+
+const char *capsule_params[] = {
+       "image-guid", "image-index", "private-key",
+       "pub-key-cert", "payload", "capsule",
+       "hardware-instance", "monotonic-count",
+       "capsule-type", "oemflags", "fw-version" };
+
+static unsigned char params_start;
+static unsigned char params_end;
+
+static void print_and_exit(const char *str)
+{
+       fprintf(stderr, "%s", str);
+       exit(EXIT_FAILURE);
+}
+
+static int param_delim_checks(char *line, unsigned char *token)
+{
+       if (!strcmp(line, PARAMS_START)) {
+               if (params_start || !params_end) {
+                       fprintf(stderr, "Earlier params processing still in 
progress. ");
+                       fprintf(stderr, "Can't start processing a new 
params.\n");
+                       exit(EXIT_FAILURE);
+               } else {
+                       params_start = 1;
+                       params_end = 0;
+                       *token = PSTART;
+                       return 1;
+               }
+       } else if (!strcmp(line, PARAMS_END)) {
+               if (!params_start) {
+                       fprintf(stderr, "Cannot put end braces without start 
braces. ");
+                       fprintf(stderr, "Please check the documentation for 
reference config file syntax\n");
+                       exit(EXIT_FAILURE);
+               } else {
+                       params_start = 0;
+                       params_end = 1;
+                       *token = PEND;
+                       return 1;
+               }
+       } else if (!params_start) {
+               fprintf(stderr, "Params should be passed within braces. ");
+               fprintf(stderr, "Please check the documentation for reference 
config file syntax\n");
+               exit(EXIT_FAILURE);
+       }
+
+       return 0;
+}
+
+static void add_guid(efi_guid_t **guid_param, char *guid)
+{
+       unsigned char uuid_buf[16];
+
+       *guid_param = malloc(sizeof(efi_guid_t));
+       if (!*guid_param)
+               print_and_exit(MALLOC_FAIL_STR);
+
+       if (uuid_parse(guid, uuid_buf))
+               print_and_exit("Wrong guid format\n");
+
+       convert_uuid_to_guid(uuid_buf);
+       memcpy(*guid_param, uuid_buf, sizeof(efi_guid_t));
+}
+
+static void add_string(char **dst, char *val)
+{
+       *dst = strdup(val);
+       if (!*dst)
+               print_and_exit(MALLOC_FAIL_STR);
+}
+
+static void match_and_populate_param(char *key, char *val,
+                                    struct efi_capsule_params *param)
+{
+       int i;
+
+       for (i = 0; i < ARRAY_SIZE(capsule_params); i++) {
+               if (!strcmp(key, capsule_params[i])) {
+                       switch (i) {
+                       case 0:
+                               add_guid(&param->image_guid, val);
+                               return;
+                       case 1:
+                               param->image_index = strtoul(val, NULL, 0);
+                               if (param->image_index == ULONG_MAX)
+                                       print_and_exit("Enter a valid value of 
index bewtween 1-255");
+                               return;
+                       case 2:
+                               add_string(&param->privkey_file, val);
+                               return;
+                       case 3:
+                               add_string(&param->cert_file, val);
+                               return;
+                       case 4:
+                               add_string(&param->input_file, val);
+                               return;
+                       case 5:
+                               add_string(&param->capsule_file, val);
+                               return;
+                       case 6:
+                               param->hardware_instance = strtoul(val, NULL, 
0);
+                               if (param->hardware_instance == ULONG_MAX)
+                                       print_and_exit("Enter a valid hardware 
instance value");
+                               return;
+                       case 7:
+                               param->monotonic_count = strtoull(val, NULL, 0);
+                               if (param->monotonic_count == ULLONG_MAX)
+                                       print_and_exit("Enter a valid monotonic 
count value");
+                               return;
+                       case 8:
+                               if (!strcmp(val, "normal"))
+                                       param->capsule = CAPSULE_NORMAL_BLOB;
+                               else if (!strcmp(val, "accept"))
+                                       param->capsule = CAPSULE_ACCEPT;
+                               else if (!strcmp(val, "revert"))
+                                       param->capsule = CAPSULE_REVERT;
+                               else
+                                       print_and_exit("Invalid type of 
capsule");
+
+                               return;
+                       case 9:
+                               param->oemflags = strtoul(val, NULL, 0);
+                               if (param->oemflags > 0xffff)
+                                       print_and_exit("OemFlags must be 
between 0x0 and 0xffff\n");
+                               return;
+                       case 10:
+                               param->fmp.fw_version = strtoul(val, NULL, 0);
+                               param->fmp.have_header = true;
+                               return;
+                       }
+               }
+       }
+
+       fprintf(stderr, "Undefined param %s specified. ", key);
+       fprintf(stderr, "Please check the documentation for reference config 
file syntax\n");
+       exit(EXIT_FAILURE);
+}
+
+static int get_capsule_params(char *line, struct efi_capsule_params *params)
+{
+       char *key = NULL;
+       char *val = NULL;
+       unsigned char token;
+
+       if (param_delim_checks(line, &token))
+               return token;
+
+       key = strtok(line, ":");
+       if (key)
+               val = strtok(NULL, "\0");
+       else
+               print_and_exit("Expect the params in a key:value pair\n");
+
+       match_and_populate_param(key, val, params);
+
+       return 0;
+}
+
+static char *skip_whitespace(char *line)
+{
+       char *ptr, *newline;
+
+       ptr = malloc(strlen(line) + 1);
+       if (!ptr)
+               print_and_exit(MALLOC_FAIL_STR);
+
+       for (newline = ptr; *line; line++)
+               if (!isblank(*line))
+                       *ptr++ = *line;
+       *ptr = '\0';
+       return newline;
+}
+
+static int parse_capsule_payload_params(FILE *fp, struct efi_capsule_params 
*params)
+{
+       char *line = NULL;
+       char *newline;
+       size_t n = 0;
+       ssize_t len;
+
+       while ((len = getline(&line, &n, fp)) != -1) {
+               if (len == 1 && line[len - 1] == '\n')
+                       continue;
+
+               line[len - 1] = '\0';
+
+               newline = skip_whitespace(line);
+
+               if (newline[0] == '#')
+                       continue;
+
+               if (get_capsule_params(newline, params) == PEND)
+                       return 0;
+       }
+
+       if (errno == EINVAL || errno == ENOMEM) {
+               fprintf(stderr, "getline() returned an error %s reading the 
line\n",
+                       strerror(errno));
+               exit(EXIT_FAILURE);
+       } else if (params_start == 1 || params_end == 0) {
+               fprintf(stderr, "Params should be passed within braces. ");
+               fprintf(stderr, "Please check the documentation for reference 
config file syntax\n");
+               exit(EXIT_FAILURE);
+       } else {
+               return -1;
+       }
+}
+
+static void params_dependency_check(struct efi_capsule_params *params)
+{
+       /* check necessary parameters */
+       if ((params->capsule == CAPSULE_NORMAL_BLOB &&
+            ((!params->input_file || !params->capsule_file ||
+              !params->image_guid) ||
+             ((params->privkey_file && !params->cert_file) ||
+              (!params->privkey_file && params->cert_file)))) ||
+           (params->capsule != CAPSULE_NORMAL_BLOB &&
+            (!params->capsule_file ||
+             (params->capsule == CAPSULE_ACCEPT && !params->image_guid) ||
+             (params->capsule == CAPSULE_REVERT && params->image_guid)))) {
+               print_usage();
+               exit(EXIT_FAILURE);
+       }
+}
+
+static void generate_capsule(struct efi_capsule_params *params)
+{
+       if (params->capsule != CAPSULE_NORMAL_BLOB) {
+               if (create_empty_capsule(params->capsule_file,
+                                        params->image_guid,
+                                        params->capsule ==
+                                        CAPSULE_ACCEPT) < 0)
+                       print_and_exit("Creating empty capsule failed\n");
+       } else if (create_fwbin(params->capsule_file, params->input_file,
+                               params->image_guid, params->image_index,
+                               params->hardware_instance,
+                               &params->fmp,
+                               params->monotonic_count,
+                               params->privkey_file,
+                               params->cert_file,
+                               (uint16_t)params->oemflags) < 0) {
+               print_and_exit("Creating firmware capsule failed\n");
+       }
+}
+
+/**
+ * capsule_with_cfg_file() - Generate capsule from config file
+ * @cfg_file: Path to the config file
+ *
+ * Parse the capsule parameters from the config file and use the
+ * parameters for generating one or more capsules.
+ *
+ * Return: None
+ *
+ */
+void capsule_with_cfg_file(const char *cfg_file)
+{
+       FILE *fp;
+       struct efi_capsule_params params = { 0 };
+
+       fp = fopen(cfg_file, "r");
+       if (!fp) {
+               fprintf(stderr, "Unable to open the capsule config file %s\n",
+                       cfg_file);
+               exit(EXIT_FAILURE);
+       }
+
+       params_start = 0;
+       params_end = 1;
+
+       while (parse_capsule_payload_params(fp, &params) != -1) {
+               params_dependency_check(&params);
+               generate_capsule(&params);
+
+               memset(&params, 0, sizeof(struct efi_capsule_params));
+       }
+}
-- 
2.34.1

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