265 lines
8.5 KiB
C
265 lines
8.5 KiB
C
#include <errno.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "psa/crypto.h"
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/* This block is present to support Visual Studio builds prior to 2015 */
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#if defined(_MSC_VER) && _MSC_VER < 1900
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#include <stdarg.h>
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int snprintf( char *s, size_t n, const char *fmt, ... )
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{
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int ret;
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va_list argp;
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/* Avoid calling the invalid parameter handler by checking ourselves */
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if( s == NULL || n == 0 || fmt == NULL )
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return( -1 );
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va_start( argp, fmt );
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#if defined(_TRUNCATE) && !defined(__MINGW32__)
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ret = _vsnprintf_s( s, n, _TRUNCATE, fmt, argp );
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#else
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ret = _vsnprintf( s, n, fmt, argp );
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if( ret < 0 || (size_t) ret == n )
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{
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s[n-1] = '\0';
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ret = -1;
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}
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#endif
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va_end( argp );
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return( ret );
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}
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#endif
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/* There are different GET_HASH macros for different kinds of algorithms
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* built from hashes, but the values are all constructed on the
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* same model. */
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#define PSA_ALG_GET_HASH(alg) \
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(((alg) & PSA_ALG_HASH_MASK) | PSA_ALG_CATEGORY_HASH)
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static void append(char **buffer, size_t buffer_size,
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size_t *required_size,
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const char *string, size_t length)
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{
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*required_size += length;
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if (*required_size < buffer_size) {
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memcpy(*buffer, string, length);
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*buffer += length;
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}
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}
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static void append_integer(char **buffer, size_t buffer_size,
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size_t *required_size,
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const char *format /*printf format for value*/,
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unsigned long value)
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{
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size_t n = snprintf(*buffer, buffer_size - *required_size, format, value);
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if (n < buffer_size - *required_size) *buffer += n;
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*required_size += n;
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}
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/* The code of these function is automatically generated and included below. */
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static const char *psa_ecc_curve_name(psa_ecc_curve_t curve);
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static const char *psa_hash_algorithm_name(psa_algorithm_t hash_alg);
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static void append_with_curve(char **buffer, size_t buffer_size,
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size_t *required_size,
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const char *string, size_t length,
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psa_ecc_curve_t curve)
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{
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const char *curve_name = psa_ecc_curve_name(curve);
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append(buffer, buffer_size, required_size, string, length);
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append(buffer, buffer_size, required_size, "(", 1);
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if (curve_name != NULL) {
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append(buffer, buffer_size, required_size,
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curve_name, strlen(curve_name));
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} else {
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append_integer(buffer, buffer_size, required_size,
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"0x%04x", curve);
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}
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append(buffer, buffer_size, required_size, ")", 1);
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}
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typedef const char *(*psa_get_algorithm_name_func_ptr)(psa_algorithm_t alg);
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static void append_with_alg(char **buffer, size_t buffer_size,
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size_t *required_size,
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psa_get_algorithm_name_func_ptr get_name,
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psa_algorithm_t alg)
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{
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const char *name = get_name(alg);
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if (name != NULL) {
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append(buffer, buffer_size, required_size,
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name, strlen(name));
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} else {
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append_integer(buffer, buffer_size, required_size,
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"0x%08lx", alg);
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}
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}
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#include "psa_constant_names_generated.c"
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static int psa_snprint_status(char *buffer, size_t buffer_size,
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psa_status_t status)
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{
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const char *name = psa_strerror(status);
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if (name == NULL) {
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return snprintf(buffer, buffer_size, "%ld", (long) status);
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} else {
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size_t length = strlen(name);
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if (length < buffer_size) {
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memcpy(buffer, name, length + 1);
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return (int) length;
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} else {
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return (int) buffer_size;
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}
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}
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}
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static int psa_snprint_ecc_curve(char *buffer, size_t buffer_size,
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psa_ecc_curve_t curve)
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{
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const char *name = psa_ecc_curve_name(curve);
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if (name == NULL) {
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return snprintf(buffer, buffer_size, "0x%04x", (unsigned) curve);
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} else {
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size_t length = strlen(name);
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if (length < buffer_size) {
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memcpy(buffer, name, length + 1);
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return (int) length;
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} else {
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return (int) buffer_size;
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}
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}
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}
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static void usage(const char *program_name)
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{
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printf("Usage: %s TYPE VALUE [VALUE...]\n",
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program_name == NULL ? "psa_constant_names" : program_name);
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printf("Print the symbolic name whose numerical value is VALUE in TYPE.\n");
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printf("Supported types (with = between aliases):\n");
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printf(" alg=algorithm Algorithm (psa_algorithm_t)\n");
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printf(" curve=ecc_curve Elliptic curve identifier (psa_ecc_curve_t)\n");
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printf(" type=key_type Key type (psa_key_type_t)\n");
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printf(" usage=key_usage Key usage (psa_key_usage_t)\n");
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printf(" error=status Status code (psa_status_t)\n");
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}
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typedef enum {
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TYPE_STATUS,
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} signed_value_type;
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int process_signed(signed_value_type type, long min, long max, char **argp)
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{
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for (; *argp != NULL; argp++) {
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char buffer[200];
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char *end;
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long value = strtol(*argp, &end, 0);
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if (*end) {
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printf("Non-numeric value: %s\n", *argp);
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return EXIT_FAILURE;
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}
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if (value < min || (errno == ERANGE && value < 0)) {
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printf("Value too small: %s\n", *argp);
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return EXIT_FAILURE;
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}
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if (value > max || (errno == ERANGE && value > 0)) {
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printf("Value too large: %s\n", *argp);
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return EXIT_FAILURE;
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}
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switch (type) {
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case TYPE_STATUS:
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psa_snprint_status(buffer, sizeof(buffer),
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(psa_status_t) value);
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break;
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}
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puts(buffer);
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}
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return EXIT_SUCCESS;
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}
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typedef enum {
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TYPE_ALGORITHM,
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TYPE_ECC_CURVE,
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TYPE_KEY_TYPE,
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TYPE_KEY_USAGE,
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} unsigned_value_type;
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int process_unsigned(unsigned_value_type type, unsigned long max, char **argp)
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{
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for (; *argp != NULL; argp++) {
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char buffer[200];
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char *end;
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unsigned long value = strtoul(*argp, &end, 0);
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if (*end) {
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printf("Non-numeric value: %s\n", *argp);
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return EXIT_FAILURE;
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}
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if (value > max || errno == ERANGE) {
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printf("Value out of range: %s\n", *argp);
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return EXIT_FAILURE;
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}
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switch (type) {
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case TYPE_ALGORITHM:
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psa_snprint_algorithm(buffer, sizeof(buffer),
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(psa_algorithm_t) value);
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break;
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case TYPE_ECC_CURVE:
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psa_snprint_ecc_curve(buffer, sizeof(buffer),
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(psa_ecc_curve_t) value);
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break;
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case TYPE_KEY_TYPE:
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psa_snprint_key_type(buffer, sizeof(buffer),
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(psa_key_type_t) value);
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break;
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case TYPE_KEY_USAGE:
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psa_snprint_key_usage(buffer, sizeof(buffer),
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(psa_key_usage_t) value);
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break;
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}
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puts(buffer);
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}
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return EXIT_SUCCESS;
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}
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int main(int argc, char *argv[])
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{
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if (argc <= 1 ||
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!strcmp(argv[1], "help") ||
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!strcmp(argv[1], "--help"))
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{
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usage(argv[0]);
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return EXIT_FAILURE;
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}
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if (!strcmp(argv[1], "error") || !strcmp(argv[1], "status")) {
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/* There's no way to obtain the actual range of a signed type,
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* so hard-code it here: psa_status_t is int32_t. */
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return process_signed(TYPE_STATUS, INT32_MIN, INT32_MAX,
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argv + 2);
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} else if (!strcmp(argv[1], "alg") || !strcmp(argv[1], "algorithm")) {
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return process_unsigned(TYPE_ALGORITHM, (psa_algorithm_t) (-1),
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argv + 2);
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} else if (!strcmp(argv[1], "curve") || !strcmp(argv[1], "ecc_curve")) {
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return process_unsigned(TYPE_ECC_CURVE, (psa_ecc_curve_t) (-1),
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argv + 2);
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} else if (!strcmp(argv[1], "type") || !strcmp(argv[1], "key_type")) {
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return process_unsigned(TYPE_KEY_TYPE, (psa_key_type_t) (-1),
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argv + 2);
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} else if (!strcmp(argv[1], "usage") || !strcmp(argv[1], "key_usage")) {
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return process_unsigned(TYPE_KEY_USAGE, (psa_key_usage_t) (-1),
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argv + 2);
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} else {
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printf("Unknown type: %s\n", argv[1]);
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return EXIT_FAILURE;
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}
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}
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