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rsa: reject buffers with data outside main SEQUENCE when parsing keys

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Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
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Valerio Setti
2024-02-08 17:40:27 +01:00
parent 7a28738205
commit 9de84bd677
3 changed files with 13 additions and 7 deletions
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10
library/rsa.c
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@@ -108,7 +108,10 @@ int mbedtls_rsa_parse_key(mbedtls_rsa_context *rsa, const unsigned char *key, si
return ret;
}
/* mbedtls_asn1_get_tag() already ensures that len is valid (i.e. p+len <= end)*/
if (end != p + len) {
return MBEDTLS_ERR_RSA_BAD_INPUT_DATA;
}
end = p + len;
if ((ret = mbedtls_asn1_get_int(&p, end, &version)) != 0) {
@@ -241,7 +244,10 @@ int mbedtls_rsa_parse_pubkey(mbedtls_rsa_context *rsa, const unsigned char *key,
return ret;
}
/* mbedtls_asn1_get_tag() already ensures that len is valid (i.e. p+len <= end)*/
if (end != p + len) {
return MBEDTLS_ERR_RSA_BAD_INPUT_DATA;
}
end = p + len;
/* Import N */