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fix(wpa_supplicant): implement sha1_finish for fastpbkdf2

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This commit is contained in:
Kapil Gupta 2023-10-26 10:59:56 +05:30
parent 8c6114d0d2
commit 99e7db4ce5
1 changed files with 63 additions and 0 deletions
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63
components/wpa_supplicant/esp_supplicant/src/crypto/fastpbkdf2.c
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@ -304,6 +304,65 @@ static int mbedtls_sha1_init_start(mbedtls_sha1_context *ctx)
return 0;
}
#ifndef MBEDTLS_SHA1_ALT
static int sha1_finish(mbedtls_sha1_context *ctx,
unsigned char output[20])
{
int ret = -1;
uint32_t used;
uint32_t high, low;
/*
* Add padding: 0x80 then 0x00 until 8 bytes remain for the length
*/
used = ctx->MBEDTLS_PRIVATE(total)[0] & 0x3F;
ctx->MBEDTLS_PRIVATE(buffer)[used++] = 0x80;
if (used <= 56) {
/* Enough room for padding + length in current block */
memset(ctx->MBEDTLS_PRIVATE(buffer) + used, 0, 56 - used);
} else {
/* We'll need an extra block */
memset(ctx->MBEDTLS_PRIVATE(buffer) + used, 0, 64 - used);
if ((ret = mbedtls_internal_sha1_process(ctx, ctx->MBEDTLS_PRIVATE(buffer))) != 0) {
goto exit;
}
memset(ctx->MBEDTLS_PRIVATE(buffer), 0, 56);
}
/*
* Add message length
*/
high = (ctx->MBEDTLS_PRIVATE(total)[0] >> 29)
| (ctx->MBEDTLS_PRIVATE(total)[1] << 3);
low = (ctx->MBEDTLS_PRIVATE(total)[0] << 3);
write32_be(high, ctx->MBEDTLS_PRIVATE(buffer) + 56);
write32_be(low, ctx->MBEDTLS_PRIVATE(buffer) + 60);
if ((ret = mbedtls_internal_sha1_process(ctx, ctx->MBEDTLS_PRIVATE(buffer))) != 0) {
goto exit;
}
/*
* Output final state
*/
write32_be(ctx->MBEDTLS_PRIVATE(state)[0], output);
write32_be(ctx->MBEDTLS_PRIVATE(state)[1], output + 4);
write32_be(ctx->MBEDTLS_PRIVATE(state)[2], output + 8);
write32_be(ctx->MBEDTLS_PRIVATE(state)[3], output + 12);
write32_be(ctx->MBEDTLS_PRIVATE(state)[4], output + 16);
ret = 0;
exit:
return ret;
}
#endif
DECL_PBKDF2(sha1, // _name
64, // _blocksz
20, // _hashsz
@ -311,7 +370,11 @@ DECL_PBKDF2(sha1, // _name
mbedtls_sha1_init_start, // _init
mbedtls_sha1_update, // _update
mbedtls_internal_sha1_process, // _xform
#if defined(MBEDTLS_SHA1_ALT)
mbedtls_sha1_finish, // _final
#else
sha1_finish, // _final
#endif
sha1_cpy, // _xcpy
sha1_extract, // _xtract
sha1_xor) // _xxor