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Diffstat (limited to 'tests/test-rsa.c')
| -rw-r--r-- | tests/test-rsa.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/tests/test-rsa.c b/tests/test-rsa.c new file mode 100644 index 0000000..95b366a --- /dev/null +++ b/tests/test-rsa.c @@ -0,0 +1,215 @@ +/* + * First stumblings towards a test harness for RSA using Cryptech + * ModExp core. + * + * For the moment this just does modular exponentiation tests using + * RSA keys and pre-formatted data-to-be-signed, without attempting + * CRT or any of the other clever stuff we should be doing. This is + * not usable for any sane purpose other than testing. + */ + +#include <stdio.h> +#include <stdint.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> + +#include "cryptech.h" +#include "test-rsa.h" + +/* + * Constant value to use with hal_io_write() when we don't want + * a read-back check thus aren't using set_register(). + */ + +static const uint8_t one[] = { 0, 0, 0, 1 }; + +/* + * Debugging aid: check a result, report on failure. + */ + +#define check(_expr_) \ + do { \ + if ((_expr_) != 0) \ + return printf("%s failed\n", #_expr_), 1; \ + } while (0) + +/* + * Set an ordinary register, with read-back check. + */ + +static int _set_register(const off_t addr, + const char * const name, + uint32_t value) +{ + uint8_t w1[4], w2[4]; + int i; + assert(name != NULL); + for (i = 3; i >= 0; i--) { + w1[i] = value & 0xFF; + value >>= 8; + } + printf("Setting register %#lx %s\n", (unsigned long) addr, name); + check(hal_io_write(addr, w1, sizeof(w1))); + check(hal_io_read(addr, w2, sizeof(w2))); + if (memcmp(w1, w2, sizeof(w1)) != 0) + printf("MISMATCH\n"); + printf("\n"); + return 0; +} + +/* + * Get value of a block memory. + */ + +static int _get_blockmem(const off_t reset_addr, + const char * const reset_name, + const off_t data_addr, + const char * const data_name, + uint8_t *value, + const size_t length) +{ + size_t i; + assert(reset_name != NULL && data_name != NULL && value != NULL && length % 4 == 0 && length <= sizeof(value)); + printf("Setting register %#lx %s\n", (unsigned long) reset_addr, reset_name); + check(hal_io_write(reset_addr, one, sizeof(one))); + printf("\n"); + printf("Getting blockmem %#lx %s\n", (unsigned long) data_addr, data_name); + for (i = 0; i < length; i += 4) + check(hal_io_read(data_addr, &value[i], 4)); + return 0; +} + +/* + * Set value of a block memory, with read-back check. + */ + +static int _set_blockmem(const off_t reset_addr, + const char * const reset_name, + const off_t data_addr, + const char * const data_name, + const uint8_t * const value, + const size_t value_length, + uint8_t *buffer, + const size_t buffer_length) +{ + size_t i; + assert(reset_name != NULL && data_name != NULL && value != NULL && buffer_length >= value_length && value_length % 4 == 0); + printf("Setting register %#lx %s\n", (unsigned long) reset_addr, reset_name); + check(hal_io_write(reset_addr, one, sizeof(one))); + printf("\n"); + printf("Setting blockmem %#lx %s\n", (unsigned long) data_addr, data_name); + for (i = 0; i < value_length; i += 4) + check(hal_io_write(data_addr, &value[i], 4)); + printf("\n"); + check(_get_blockmem(reset_addr, reset_name, data_addr, data_name, buffer, value_length)); + if (memcmp(value, buffer, value_length)) + printf("MISMATCH\n"); + printf("\n"); + return 0; +} + +/* + * Syntactic sugar. + */ + +#define set_register(_field_, _value_) \ + _set_register(_field_, #_field_, _value_) + +#define get_blockmem(_field_, _value_) \ + _get_blockmem(_field_##_PTR_RST, #_field_ "_PTR_RST", _field_##_DATA, #_field_ "_DATA", _value_, sizeof(_value_)) + +#define set_blockmem(_field_, _value_, _buffer_) \ + _set_blockmem(_field_##_PTR_RST, #_field_ "_PTR_RST", _field_##_DATA, #_field_ "_DATA", (_value_).val, (_value_).len, _buffer_, sizeof(_buffer_)) + +/* + * Test driver. + */ + +static int test(const rsa_tc_t * const tc) +{ + uint8_t b[4096]; + + printf("Signature test for %lu-bit RSA key\n", (unsigned long) tc->size); + + check(set_blockmem(MODEXP_MODULUS, tc->n, b)); + check(set_blockmem(MODEXP_MESSAGE, tc->m, b)); + check(set_register(MODEXP_MODULUS_LENGTH, tc->n.len / 4)); + + check(set_blockmem(MODEXP_EXPONENT, tc->d, b)); + check(set_register(MODEXP_EXPONENT_LENGTH, tc->d.len / 4)); + + printf("Checking ready status\n"); + check(hal_io_wait_ready(MODEXP_ADDR_STATUS)); + printf("\n"); + + check(set_register(MODEXP_ADDR_CTRL, 1)); + + printf("Waiting for ready\n"); + check(hal_io_wait(MODEXP_ADDR_STATUS, STATUS_READY, NULL)); + printf("\n"); + + check(get_blockmem(MODEXP_RESULT, b)); + + printf("Comparing results with known value..."); + if (memcmp(b, tc->s.val, tc->s.len)) + printf("MISMATCH\n"); + else + printf("OK\n"); + + printf("Verification test for %lu-bit RSA key\n", (unsigned long) tc->size); + + check(set_blockmem(MODEXP_MODULUS, tc->n, b)); + check(set_blockmem(MODEXP_MESSAGE, tc->m, b)); + check(set_register(MODEXP_MODULUS_LENGTH, tc->n.len / 4)); + + check(set_blockmem(MODEXP_EXPONENT, tc->e, b)); + check(set_register(MODEXP_EXPONENT_LENGTH, tc->e.len / 4)); + + printf("Checking ready status\n"); + check(hal_io_wait_ready(MODEXP_ADDR_STATUS)); + printf("\n"); + + check(set_register(MODEXP_ADDR_CTRL, 1)); + + printf("Waiting for ready\n"); + check(hal_io_wait(MODEXP_ADDR_STATUS, STATUS_READY, NULL)); + printf("\n"); + + check(get_blockmem(MODEXP_RESULT, b)); + + printf("Comparing results with known value..."); + if (memcmp(b, tc->m.val, tc->m.len)) + printf("MISMATCH\n"); + else + printf("OK\n"); + + return 0; +} + + +int main(int argc, char *argv[]) +{ + uint8_t name[8], version[4]; + int i; + + /* + * Initialize EIM and report what core we're running. + */ + + check(hal_io_read(MODEXP_ADDR_NAME0, name, sizeof(name))); + check(hal_io_read(MODEXP_ADDR_VERSION, version, sizeof(version))); + printf("\"%8.8s\" \"%4.4s\"\n\n", name, version); + + hal_io_set_debug(1); + + /* + * Run all the test cases. + */ + + for (i = 0; i < sizeof(rsa_tc)/sizeof(*rsa_tc); i++) + if (test(&rsa_tc[i])) + return 1; + + return 0; +} |