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Merge branch 'bugfix/hardware_mpi_sign' into 'master'

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hwcrypto mpi: Fix losing sign when multiplying by -1 (github PR)

Contribution from github: https://github.com/espressif/esp-idf/pull/1181/

See merge request !1471
This commit is contained in:
Ivan Grokhotkov
2017-11-07 19:30:31 +08:00
parent 1613044aef 5405255928
commit 744896bde2
1 changed files with 6 additions and 2 deletions
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8
components/mbedtls/port/esp_bignum.c
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@ -497,10 +497,14 @@ int mbedtls_mpi_mul_mpi( mbedtls_mpi *Z, const mbedtls_mpi *X, const mbedtls_mpi
return 0; return 0;
} }
if (bits_x == 1) { if (bits_x == 1) {
return mbedtls_mpi_copy(Z, Y); ret = mbedtls_mpi_copy(Z, Y);
Z->s *= X->s;
return ret;
} }
if (bits_y == 1) { if (bits_y == 1) {
return mbedtls_mpi_copy(Z, X); ret = mbedtls_mpi_copy(Z, X);
Z->s *= Y->s;
return ret;
} }
words_mult = (words_x > words_y ? words_x : words_y); words_mult = (words_x > words_y ? words_x : words_y);