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rsa: handle buffer length similarly in private and public key parsing

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Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
This commit is contained in:
Valerio Setti 2024-02-06 08:00:18 +01:00
parent 45c33ed41e
commit fe329cea3f
3 changed files with 9 additions and 3 deletions
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8
library/rsa.c
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@ -109,6 +109,10 @@ int mbedtls_rsa_parse_key(mbedtls_rsa_context *rsa, const unsigned char *key, si
end = p + len;
if (end > (key + keylen)) {
return MBEDTLS_ERR_ASN1_LENGTH_MISMATCH;
}
if ((ret = mbedtls_asn1_get_int(&p, end, &version)) != 0) {
return ret;
}
@ -239,7 +243,9 @@ int mbedtls_rsa_parse_pubkey(mbedtls_rsa_context *rsa, const unsigned char *key,
return ret;
}
if (p + len != end) {
end = p + len;
if (end > (key + keylen)) {
return MBEDTLS_ERR_ASN1_LENGTH_MISMATCH;
}

2
tests/suites/test_suite_rsa.data
View File

@ -707,7 +707,7 @@ RSA parse public key - public exponent 0
rsa_parse_pkcs1_key:1:"308189028181009f091e6968b474f76f0e9c237c1d895996ae704b4f6d706acec8d2daac6209bf524aa3f658d0283adba1077f6cbe92e425dcde52290b239cade91be86c88425434986806e85734e159768f3dfea932baaa9409d25bace8ee9dce0cdde0903207299de575ae60feccf0daf82334ab83638539b0da74072f253acea8afc8e66bb70203000000":MBEDTLS_ERR_RSA_BAD_INPUT_DATA
RSA parse public key - wrong sequence length
rsa_parse_pkcs1_key:1:"308188028181009f091e6968b474f76f0e9c237c1d895996ae704b4f6d706acec8d2daac6209bf524aa3f658d0283adba1077f6cbe92e425dcde52290b239cade91be86c88425434986806e85734e159768f3dfea932baaa9409d25bace8ee9dce0cdde0903207299de575ae60feccf0daf82334ab83638539b0da74072f253acea8afc8e66bb70203010001":MBEDTLS_ERR_ASN1_LENGTH_MISMATCH
rsa_parse_pkcs1_key:1:"308188028181009f091e6968b474f76f0e9c237c1d895996ae704b4f6d706acec8d2daac6209bf524aa3f658d0283adba1077f6cbe92e425dcde52290b239cade91be86c88425434986806e85734e159768f3dfea932baaa9409d25bace8ee9dce0cdde0903207299de575ae60feccf0daf82334ab83638539b0da74072f253acea8afc8e66bb70203010001":MBEDTLS_ERR_ASN1_OUT_OF_DATA
RSA parse public key - wrong modulus length
rsa_parse_pkcs1_key:1:"308189028180009f091e6968b474f76f0e9c237c1d895996ae704b4f6d706acec8d2daac6209bf524aa3f658d0283adba1077f6cbe92e425dcde52290b239cade91be86c88425434986806e85734e159768f3dfea932baaa9409d25bace8ee9dce0cdde0903207299de575ae60feccf0daf82334ab83638539b0da74072f253acea8afc8e66bb70203010001":MBEDTLS_ERR_ASN1_UNEXPECTED_TAG

2
tests/suites/test_suite_x509parse.data
View File

@ -1774,7 +1774,7 @@ x509parse_crt:"307d3068a0030201008204deadbeef300d06092a864886f70d01010b0500300c3
X509 CRT ASN1 (TBS, inv SubPubKeyInfo, inv internal bitstring length)
depends_on:MBEDTLS_RSA_C:MBEDTLS_MD_CAN_SHA256
x509parse_crt:"308180306ba0030201008204deadbeef300d06092a864886f70d01010b0500300c310a30080600130454657374301c170c303930313031303030303030170c303931323331323335393539300c310a300806001304546573743015300d06092A864886F70D0101010500030400300000300d06092a864886f70d01010b0500030200ff":"":MBEDTLS_ERR_PK_INVALID_PUBKEY + MBEDTLS_ERR_ASN1_LENGTH_MISMATCH
x509parse_crt:"308180306ba0030201008204deadbeef300d06092a864886f70d01010b0500300c310a30080600130454657374301c170c303930313031303030303030170c303931323331323335393539300c310a300806001304546573743015300d06092A864886F70D0101010500030400300000300d06092a864886f70d01010b0500030200ff":"":MBEDTLS_ERR_PK_INVALID_PUBKEY + MBEDTLS_ERR_ASN1_OUT_OF_DATA
X509 CRT ASN1 (TBS, inv SubPubKeyInfo, inv internal bitstring tag)
depends_on:MBEDTLS_RSA_C:MBEDTLS_MD_CAN_SHA256