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wpa_supplicant: Fix SAE test-case failure on mbedtls version udpate

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Problem:
mbedtls_ctr_drbg_context was initialized in crypto_ec_point_mul. This
was okay in releases before 2.16.4 as entropy_len used to get set to
MBEDTLS_CTR_DRBG_ENTROPY_LEN in function mbedtls_ctr_drbg_seed. The
function is now changed to set the length to
MBEDTLS_CTR_DRBG_ENTROPY_LEN if previous length is 0 and hence the bug.

Solution:
Initialize mbedtls_ctr_drbg_context in crypto_ec_point_mul.
This commit is contained in:
Sagar Bijwe 2020-02-26 17:18:35 +05:30 committed by Mahavir Jain
parent 9f024df9e5
commit 5c4f7948d4
1 changed files with 5 additions and 4 deletions
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components/wpa_supplicant/src/crypto/crypto_mbedtls.c
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@ -417,6 +417,7 @@ int crypto_ec_point_mul(struct crypto_ec *e, const struct crypto_ec_point *p,
mbedtls_ctr_drbg_context ctr_drbg; mbedtls_ctr_drbg_context ctr_drbg;
mbedtls_entropy_init(&entropy); mbedtls_entropy_init(&entropy);
mbedtls_ctr_drbg_init(&ctr_drbg);
MBEDTLS_MPI_CHK(mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy, MBEDTLS_MPI_CHK(mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
NULL, 0)); NULL, 0));