![]() |
mbed TLS
Version 2.8.0
SSL/TLS Library for the Embedded Space
|
The X.509 module provides X.509 support for reading, writing and verification of certificates. More...
Structures | |
struct | mbedtls_x509_time |
Container for date and time (precision in seconds). More... | |
struct | mbedtls_x509_crl_entry |
Certificate revocation list entry. More... | |
struct | mbedtls_x509_crl |
Certificate revocation list structure. More... | |
struct | mbedtls_x509_crt |
Container for an X.509 certificate. More... | |
struct | mbedtls_x509_crt_profile |
Security profile for certificate verification. More... | |
struct | mbedtls_x509write_cert |
Container for writing a certificate (CRT) More... | |
struct | mbedtls_x509_csr |
Certificate Signing Request (CSR) structure. More... | |
struct | mbedtls_x509write_csr |
Container for writing a CSR. More... | |
Macros | |
#define | MBEDTLS_X509_MAX_INTERMEDIATE_CA 8 |
Maximum number of intermediate CAs in a verification chain. More... | |
Functions | |
int | mbedtls_dhm_parse_dhm (mbedtls_dhm_context *dhm, const unsigned char *dhmin, size_t dhminlen) |
This function parses DHM parameters in PEM or DER format. More... | |
int | mbedtls_dhm_parse_dhmfile (mbedtls_dhm_context *dhm, const char *path) |
This function loads and parses DHM parameters from a file. More... | |
X509 Error codes | |
#define | MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE -0x2080 |
Unavailable feature, e.g. More... | |
#define | MBEDTLS_ERR_X509_UNKNOWN_OID -0x2100 |
Requested OID is unknown. More... | |
#define | MBEDTLS_ERR_X509_INVALID_FORMAT -0x2180 |
The CRT/CRL/CSR format is invalid, e.g. More... | |
#define | MBEDTLS_ERR_X509_INVALID_VERSION -0x2200 |
The CRT/CRL/CSR version element is invalid. More... | |
#define | MBEDTLS_ERR_X509_INVALID_SERIAL -0x2280 |
The serial tag or value is invalid. More... | |
#define | MBEDTLS_ERR_X509_INVALID_ALG -0x2300 |
The algorithm tag or value is invalid. More... | |
#define | MBEDTLS_ERR_X509_INVALID_NAME -0x2380 |
The name tag or value is invalid. More... | |
#define | MBEDTLS_ERR_X509_INVALID_DATE -0x2400 |
The date tag or value is invalid. More... | |
#define | MBEDTLS_ERR_X509_INVALID_SIGNATURE -0x2480 |
The signature tag or value invalid. More... | |
#define | MBEDTLS_ERR_X509_INVALID_EXTENSIONS -0x2500 |
The extension tag or value is invalid. More... | |
#define | MBEDTLS_ERR_X509_UNKNOWN_VERSION -0x2580 |
CRT/CRL/CSR has an unsupported version number. More... | |
#define | MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG -0x2600 |
Signature algorithm (oid) is unsupported. More... | |
#define | MBEDTLS_ERR_X509_SIG_MISMATCH -0x2680 |
Signature algorithms do not match. More... | |
#define | MBEDTLS_ERR_X509_CERT_VERIFY_FAILED -0x2700 |
Certificate verification failed, e.g. More... | |
#define | MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT -0x2780 |
Format not recognized as DER or PEM. More... | |
#define | MBEDTLS_ERR_X509_BAD_INPUT_DATA -0x2800 |
Input invalid. More... | |
#define | MBEDTLS_ERR_X509_ALLOC_FAILED -0x2880 |
Allocation of memory failed. More... | |
#define | MBEDTLS_ERR_X509_FILE_IO_ERROR -0x2900 |
Read/write of file failed. More... | |
#define | MBEDTLS_ERR_X509_BUFFER_TOO_SMALL -0x2980 |
Destination buffer is too small. More... | |
#define | MBEDTLS_ERR_X509_FATAL_ERROR -0x3000 |
A fatal error occured, eg the chain is too long or the vrfy callback failed. More... | |
X509 Verify codes | |
#define | MBEDTLS_X509_BADCERT_EXPIRED 0x01 |
The certificate validity has expired. More... | |
#define | MBEDTLS_X509_BADCERT_REVOKED 0x02 |
The certificate has been revoked (is on a CRL). More... | |
#define | MBEDTLS_X509_BADCERT_CN_MISMATCH 0x04 |
The certificate Common Name (CN) does not match with the expected CN. More... | |
#define | MBEDTLS_X509_BADCERT_NOT_TRUSTED 0x08 |
The certificate is not correctly signed by the trusted CA. More... | |
#define | MBEDTLS_X509_BADCRL_NOT_TRUSTED 0x10 |
The CRL is not correctly signed by the trusted CA. More... | |
#define | MBEDTLS_X509_BADCRL_EXPIRED 0x20 |
The CRL is expired. More... | |
#define | MBEDTLS_X509_BADCERT_MISSING 0x40 |
Certificate was missing. More... | |
#define | MBEDTLS_X509_BADCERT_SKIP_VERIFY 0x80 |
Certificate verification was skipped. More... | |
#define | MBEDTLS_X509_BADCERT_OTHER 0x0100 |
Other reason (can be used by verify callback) | |
#define | MBEDTLS_X509_BADCERT_FUTURE 0x0200 |
The certificate validity starts in the future. More... | |
#define | MBEDTLS_X509_BADCRL_FUTURE 0x0400 |
The CRL is from the future. | |
#define | MBEDTLS_X509_BADCERT_KEY_USAGE 0x0800 |
Usage does not match the keyUsage extension. More... | |
#define | MBEDTLS_X509_BADCERT_EXT_KEY_USAGE 0x1000 |
Usage does not match the extendedKeyUsage extension. More... | |
#define | MBEDTLS_X509_BADCERT_NS_CERT_TYPE 0x2000 |
Usage does not match the nsCertType extension. More... | |
#define | MBEDTLS_X509_BADCERT_BAD_MD 0x4000 |
The certificate is signed with an unacceptable hash. More... | |
#define | MBEDTLS_X509_BADCERT_BAD_PK 0x8000 |
The certificate is signed with an unacceptable PK alg (eg RSA vs ECDSA). More... | |
#define | MBEDTLS_X509_BADCERT_BAD_KEY 0x010000 |
The certificate is signed with an unacceptable key (eg bad curve, RSA too short). More... | |
#define | MBEDTLS_X509_BADCRL_BAD_MD 0x020000 |
The CRL is signed with an unacceptable hash. More... | |
#define | MBEDTLS_X509_BADCRL_BAD_PK 0x040000 |
The CRL is signed with an unacceptable PK alg (eg RSA vs ECDSA). More... | |
#define | MBEDTLS_X509_BADCRL_BAD_KEY 0x080000 |
The CRL is signed with an unacceptable key (eg bad curve, RSA too short). More... | |
Structures for parsing X.509 certificates, CRLs and CSRs | |
typedef mbedtls_asn1_buf | mbedtls_x509_buf |
Type-length-value structure that allows for ASN1 using DER. | |
typedef mbedtls_asn1_bitstring | mbedtls_x509_bitstring |
Container for ASN1 bit strings. | |
typedef mbedtls_asn1_named_data | mbedtls_x509_name |
Container for ASN1 named information objects. More... | |
typedef mbedtls_asn1_sequence | mbedtls_x509_sequence |
Container for a sequence of ASN.1 items. | |
Structures and functions for parsing CRLs | |
int | mbedtls_x509_crl_parse_der (mbedtls_x509_crl *chain, const unsigned char *buf, size_t buflen) |
Parse a DER-encoded CRL and append it to the chained list. More... | |
int | mbedtls_x509_crl_parse (mbedtls_x509_crl *chain, const unsigned char *buf, size_t buflen) |
Parse one or more CRLs and append them to the chained list. More... | |
int | mbedtls_x509_crl_parse_file (mbedtls_x509_crl *chain, const char *path) |
Load one or more CRLs and append them to the chained list. More... | |
int | mbedtls_x509_crl_info (char *buf, size_t size, const char *prefix, const mbedtls_x509_crl *crl) |
Returns an informational string about the CRL. More... | |
void | mbedtls_x509_crl_init (mbedtls_x509_crl *crl) |
Initialize a CRL (chain) More... | |
void | mbedtls_x509_crl_free (mbedtls_x509_crl *crl) |
Unallocate all CRL data. More... | |
Structures and functions for parsing and writing X.509 certificates | |
const mbedtls_x509_crt_profile | mbedtls_x509_crt_profile_default |
Default security profile. More... | |
const mbedtls_x509_crt_profile | mbedtls_x509_crt_profile_next |
Expected next default profile. More... | |
const mbedtls_x509_crt_profile | mbedtls_x509_crt_profile_suiteb |
NSA Suite B profile. | |
int | mbedtls_x509_crt_parse_der (mbedtls_x509_crt *chain, const unsigned char *buf, size_t buflen) |
Parse a single DER formatted certificate and add it to the chained list. More... | |
int | mbedtls_x509_crt_parse (mbedtls_x509_crt *chain, const unsigned char *buf, size_t buflen) |
Parse one or more certificates and add them to the chained list. More... | |
int | mbedtls_x509_crt_parse_file (mbedtls_x509_crt *chain, const char *path) |
Load one or more certificates and add them to the chained list. More... | |
int | mbedtls_x509_crt_parse_path (mbedtls_x509_crt *chain, const char *path) |
Load one or more certificate files from a path and add them to the chained list. More... | |
int | mbedtls_x509_crt_info (char *buf, size_t size, const char *prefix, const mbedtls_x509_crt *crt) |
Returns an informational string about the certificate. More... | |
int | mbedtls_x509_crt_verify_info (char *buf, size_t size, const char *prefix, uint32_t flags) |
Returns an informational string about the verification status of a certificate. More... | |
int | mbedtls_x509_crt_verify (mbedtls_x509_crt *crt, mbedtls_x509_crt *trust_ca, mbedtls_x509_crl *ca_crl, const char *cn, uint32_t *flags, int(*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *), void *p_vrfy) |
Verify the certificate signature. More... | |
int | mbedtls_x509_crt_verify_with_profile (mbedtls_x509_crt *crt, mbedtls_x509_crt *trust_ca, mbedtls_x509_crl *ca_crl, const mbedtls_x509_crt_profile *profile, const char *cn, uint32_t *flags, int(*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *), void *p_vrfy) |
Verify the certificate signature according to profile. More... | |
int | mbedtls_x509_crt_check_key_usage (const mbedtls_x509_crt *crt, unsigned int usage) |
Check usage of certificate against keyUsage extension. More... | |
int | mbedtls_x509_crt_check_extended_key_usage (const mbedtls_x509_crt *crt, const char *usage_oid, size_t usage_len) |
Check usage of certificate against extendedKeyUsage. More... | |
int | mbedtls_x509_crt_is_revoked (const mbedtls_x509_crt *crt, const mbedtls_x509_crl *crl) |
Verify the certificate revocation status. More... | |
void | mbedtls_x509_crt_init (mbedtls_x509_crt *crt) |
Initialize a certificate (chain) More... | |
void | mbedtls_x509_crt_free (mbedtls_x509_crt *crt) |
Unallocate all certificate data. More... | |
#define | MBEDTLS_X509_ID_FLAG(id) ( 1 << ( id - 1 ) ) |
Build flag from an algorithm/curve identifier (pk, md, ecp) Since 0 is always XXX_NONE, ignore it. | |
#define | MBEDTLS_X509_CRT_VERSION_1 0 |
#define | MBEDTLS_X509_CRT_VERSION_2 1 |
#define | MBEDTLS_X509_CRT_VERSION_3 2 |
#define | MBEDTLS_X509_RFC5280_MAX_SERIAL_LEN 32 |
#define | MBEDTLS_X509_RFC5280_UTC_TIME_LEN 15 |
#define | MBEDTLS_X509_MAX_FILE_PATH_LEN 512 |
Structures and functions for X.509 Certificate Signing Requests (CSR) | |
int | mbedtls_x509_csr_parse_der (mbedtls_x509_csr *csr, const unsigned char *buf, size_t buflen) |
Load a Certificate Signing Request (CSR) in DER format. More... | |
int | mbedtls_x509_csr_parse (mbedtls_x509_csr *csr, const unsigned char *buf, size_t buflen) |
Load a Certificate Signing Request (CSR), DER or PEM format. More... | |
int | mbedtls_x509_csr_parse_file (mbedtls_x509_csr *csr, const char *path) |
Load a Certificate Signing Request (CSR) More... | |
int | mbedtls_x509_csr_info (char *buf, size_t size, const char *prefix, const mbedtls_x509_csr *csr) |
Returns an informational string about the CSR. More... | |
void | mbedtls_x509_csr_init (mbedtls_x509_csr *csr) |
Initialize a CSR. More... | |
void | mbedtls_x509_csr_free (mbedtls_x509_csr *csr) |
Unallocate all CSR data. More... | |
The X.509 module provides X.509 support for reading, writing and verification of certificates.
In summary:
mbedtls_x509_crt_parse()
, mbedtls_x509_crt_parse_der()
, mbedtls_x509_crt_parse_file()
).mbedtls_x509_crl_parse()
, mbedtls_x509_crl_parse_der()
, and mbedtls_x509_crl_parse_file()
).mbedtls_x509_crt_verify()
and mbedtls_x509_crt_verify_with_profile()
.mbedtls_x509write_crt_der()
and mbedtls_x509write_csr_der()
).This module can be used to build a certificate authority (CA) chain and verify its signature. It is also used to generate Certificate Signing Requests and X.509 certificates just as a CA would do.
struct mbedtls_x509_time |
struct mbedtls_x509_crl_entry |
Certificate revocation list entry.
Contains the CA-specific serial numbers and revocation dates.
Data Fields | ||
---|---|---|
mbedtls_x509_buf | entry_ext | |
struct mbedtls_x509_crl_entry * | next | |
mbedtls_x509_buf | raw | |
mbedtls_x509_time | revocation_date | |
mbedtls_x509_buf | serial |
struct mbedtls_x509_crl |
Certificate revocation list structure.
Every CRL may have multiple entries.
Data Fields | ||
---|---|---|
mbedtls_x509_buf | crl_ext | |
mbedtls_x509_crl_entry | entry | The CRL entries containing the certificate revocation times for this CA. |
mbedtls_x509_name | issuer | The parsed issuer data (named information object). |
mbedtls_x509_buf | issuer_raw | The raw issuer data (DER). |
struct mbedtls_x509_crl * | next | |
mbedtls_x509_time | next_update | |
mbedtls_x509_buf | raw | The raw certificate data (DER). |
mbedtls_x509_buf | sig | |
mbedtls_md_type_t | sig_md |
Internal representation of the MD algorithm of the signature algorithm, e.g. MBEDTLS_MD_SHA256 |
mbedtls_x509_buf | sig_oid | CRL signature type identifier. |
mbedtls_x509_buf | sig_oid2 | |
void * | sig_opts |
Signature options to be passed to mbedtls_pk_verify_ext(), e.g. for RSASSA-PSS |
mbedtls_pk_type_t | sig_pk |
Internal representation of the Public Key algorithm of the signature algorithm, e.g. MBEDTLS_PK_RSA |
mbedtls_x509_buf | tbs |
The raw certificate body (DER). The part that is To Be Signed. |
mbedtls_x509_time | this_update | |
int | version | CRL version (1=v1, 2=v2) |
struct mbedtls_x509_crt |
Container for an X.509 certificate.
The certificate may be chained.
Data Fields | ||
---|---|---|
int | ca_istrue | Optional Basic Constraint extension value: 1 if this certificate belongs to a CA, 0 otherwise. |
mbedtls_x509_sequence | ext_key_usage | Optional list of extended key usage OIDs. |
int | ext_types | Bit string containing detected and parsed extensions. |
mbedtls_x509_name | issuer | The parsed issuer data (named information object). |
mbedtls_x509_buf | issuer_id | Optional X.509 v2/v3 issuer unique identifier. |
mbedtls_x509_buf | issuer_raw |
The raw issuer data (DER). Used for quick comparison. |
unsigned int | key_usage | Optional key usage extension value: See the values in x509.h. |
int | max_pathlen |
Optional Basic Constraint extension value: The maximum path length to the root certificate. Path length is 1 higher than RFC 5280 'meaning', so 1+ |
struct mbedtls_x509_crt * | next | Next certificate in the CA-chain. |
unsigned char | ns_cert_type | Optional Netscape certificate type extension value: See the values in x509.h. |
mbedtls_pk_context | pk | Container for the public key context. |
mbedtls_x509_buf | raw | The raw certificate data (DER). |
mbedtls_x509_buf | serial | Unique id for certificate issued by a specific CA. |
mbedtls_x509_buf | sig | Signature: hash of the tbs part signed with the private key. |
mbedtls_md_type_t | sig_md |
Internal representation of the MD algorithm of the signature algorithm, e.g. MBEDTLS_MD_SHA256 |
mbedtls_x509_buf | sig_oid |
Signature algorithm, e.g. sha1RSA |
void * | sig_opts |
Signature options to be passed to mbedtls_pk_verify_ext(), e.g. for RSASSA-PSS |
mbedtls_pk_type_t | sig_pk |
Internal representation of the Public Key algorithm of the signature algorithm, e.g. MBEDTLS_PK_RSA |
mbedtls_x509_name | subject | The parsed subject data (named information object). |
mbedtls_x509_sequence | subject_alt_names | Optional list of Subject Alternative Names (Only dNSName supported). |
mbedtls_x509_buf | subject_id | Optional X.509 v2/v3 subject unique identifier. |
mbedtls_x509_buf | subject_raw |
The raw subject data (DER). Used for quick comparison. |
mbedtls_x509_buf | tbs |
The raw certificate body (DER). The part that is To Be Signed. |
mbedtls_x509_buf | v3_ext | Optional X.509 v3 extensions. |
mbedtls_x509_time | valid_from | Start time of certificate validity. |
mbedtls_x509_time | valid_to | End time of certificate validity. |
int | version |
The X.509 version. (1=v1, 2=v2, 3=v3) |
struct mbedtls_x509_crt_profile |
Security profile for certificate verification.
All lists are bitfields, built by ORing flags from MBEDTLS_X509_ID_FLAG().
Data Fields | ||
---|---|---|
uint32_t | allowed_curves | Elliptic curves for ECDSA. |
uint32_t | allowed_mds | MDs for signatures. |
uint32_t | allowed_pks | PK algs for signatures. |
uint32_t | rsa_min_bitlen | Minimum size for RSA keys. |
struct mbedtls_x509write_cert |
Container for writing a certificate (CRT)
Data Fields | ||
---|---|---|
mbedtls_asn1_named_data * | extensions | |
mbedtls_asn1_named_data * | issuer | |
mbedtls_pk_context * | issuer_key | |
mbedtls_md_type_t | md_alg | |
char | not_after[MBEDTLS_X509_RFC5280_UTC_TIME_LEN+1] | |
char | not_before[MBEDTLS_X509_RFC5280_UTC_TIME_LEN+1] | |
mbedtls_mpi | serial | |
mbedtls_asn1_named_data * | subject | |
mbedtls_pk_context * | subject_key | |
int | version |
struct mbedtls_x509_csr |
Certificate Signing Request (CSR) structure.
Data Fields | ||
---|---|---|
mbedtls_x509_buf | cri | The raw CertificateRequestInfo body (DER). |
mbedtls_pk_context | pk | Container for the public key context. |
mbedtls_x509_buf | raw | The raw CSR data (DER). |
mbedtls_x509_buf | sig | |
mbedtls_md_type_t | sig_md |
Internal representation of the MD algorithm of the signature algorithm, e.g. MBEDTLS_MD_SHA256 |
mbedtls_x509_buf | sig_oid | |
void * | sig_opts |
Signature options to be passed to mbedtls_pk_verify_ext(), e.g. for RSASSA-PSS |
mbedtls_pk_type_t | sig_pk |
Internal representation of the Public Key algorithm of the signature algorithm, e.g. MBEDTLS_PK_RSA |
mbedtls_x509_name | subject | The parsed subject data (named information object). |
mbedtls_x509_buf | subject_raw | The raw subject data (DER). |
int | version | CSR version (1=v1). |
struct mbedtls_x509write_csr |
Container for writing a CSR.
Data Fields | ||
---|---|---|
mbedtls_asn1_named_data * | extensions | |
mbedtls_pk_context * | key | |
mbedtls_md_type_t | md_alg | |
mbedtls_asn1_named_data * | subject |
#define MBEDTLS_ERR_X509_ALLOC_FAILED -0x2880 |
Allocation of memory failed.
#define MBEDTLS_ERR_X509_BAD_INPUT_DATA -0x2800 |
Input invalid.
#define MBEDTLS_ERR_X509_BUFFER_TOO_SMALL -0x2980 |
Destination buffer is too small.
#define MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT -0x2780 |
Format not recognized as DER or PEM.
#define MBEDTLS_ERR_X509_CERT_VERIFY_FAILED -0x2700 |
Certificate verification failed, e.g.
CRL, CA or signature check failed.
#define MBEDTLS_ERR_X509_FATAL_ERROR -0x3000 |
A fatal error occured, eg the chain is too long or the vrfy callback failed.
#define MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE -0x2080 |
Unavailable feature, e.g.
RSA hashing/encryption combination.
#define MBEDTLS_ERR_X509_FILE_IO_ERROR -0x2900 |
Read/write of file failed.
#define MBEDTLS_ERR_X509_INVALID_ALG -0x2300 |
The algorithm tag or value is invalid.
#define MBEDTLS_ERR_X509_INVALID_DATE -0x2400 |
The date tag or value is invalid.
#define MBEDTLS_ERR_X509_INVALID_EXTENSIONS -0x2500 |
The extension tag or value is invalid.
#define MBEDTLS_ERR_X509_INVALID_FORMAT -0x2180 |
The CRT/CRL/CSR format is invalid, e.g.
different type expected.
#define MBEDTLS_ERR_X509_INVALID_NAME -0x2380 |
The name tag or value is invalid.
#define MBEDTLS_ERR_X509_INVALID_SERIAL -0x2280 |
The serial tag or value is invalid.
#define MBEDTLS_ERR_X509_INVALID_SIGNATURE -0x2480 |
The signature tag or value invalid.
#define MBEDTLS_ERR_X509_INVALID_VERSION -0x2200 |
The CRT/CRL/CSR version element is invalid.
#define MBEDTLS_ERR_X509_SIG_MISMATCH -0x2680 |
Signature algorithms do not match.
(see mbedtls_x509_crt
sig_oid)
#define MBEDTLS_ERR_X509_UNKNOWN_OID -0x2100 |
Requested OID is unknown.
#define MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG -0x2600 |
Signature algorithm (oid) is unsupported.
#define MBEDTLS_ERR_X509_UNKNOWN_VERSION -0x2580 |
CRT/CRL/CSR has an unsupported version number.
#define MBEDTLS_X509_BADCERT_BAD_KEY 0x010000 |
The certificate is signed with an unacceptable key (eg bad curve, RSA too short).
#define MBEDTLS_X509_BADCERT_BAD_MD 0x4000 |
The certificate is signed with an unacceptable hash.
#define MBEDTLS_X509_BADCERT_BAD_PK 0x8000 |
The certificate is signed with an unacceptable PK alg (eg RSA vs ECDSA).
#define MBEDTLS_X509_BADCERT_CN_MISMATCH 0x04 |
The certificate Common Name (CN) does not match with the expected CN.
#define MBEDTLS_X509_BADCERT_EXPIRED 0x01 |
The certificate validity has expired.
#define MBEDTLS_X509_BADCERT_EXT_KEY_USAGE 0x1000 |
Usage does not match the extendedKeyUsage extension.
#define MBEDTLS_X509_BADCERT_FUTURE 0x0200 |
The certificate validity starts in the future.
#define MBEDTLS_X509_BADCERT_KEY_USAGE 0x0800 |
Usage does not match the keyUsage extension.
#define MBEDTLS_X509_BADCERT_MISSING 0x40 |
Certificate was missing.
#define MBEDTLS_X509_BADCERT_NOT_TRUSTED 0x08 |
The certificate is not correctly signed by the trusted CA.
#define MBEDTLS_X509_BADCERT_NS_CERT_TYPE 0x2000 |
Usage does not match the nsCertType extension.
#define MBEDTLS_X509_BADCERT_REVOKED 0x02 |
The certificate has been revoked (is on a CRL).
#define MBEDTLS_X509_BADCERT_SKIP_VERIFY 0x80 |
Certificate verification was skipped.
#define MBEDTLS_X509_BADCRL_BAD_KEY 0x080000 |
The CRL is signed with an unacceptable key (eg bad curve, RSA too short).
#define MBEDTLS_X509_BADCRL_BAD_MD 0x020000 |
The CRL is signed with an unacceptable hash.
#define MBEDTLS_X509_BADCRL_BAD_PK 0x040000 |
The CRL is signed with an unacceptable PK alg (eg RSA vs ECDSA).
#define MBEDTLS_X509_BADCRL_EXPIRED 0x20 |
The CRL is expired.
#define MBEDTLS_X509_BADCRL_NOT_TRUSTED 0x10 |
The CRL is not correctly signed by the trusted CA.
#define MBEDTLS_X509_MAX_INTERMEDIATE_CA 8 |
Maximum number of intermediate CAs in a verification chain.
That is, maximum length of the chain, excluding the end-entity certificate and the trusted root certificate.
Set this to a low value to prevent an adversary from making you waste resources verifying an overlong certificate chain.
Container for ASN1 named information objects.
It allows for Relative Distinguished Names (e.g. cn=localhost,ou=code,etc.).
int mbedtls_dhm_parse_dhm | ( | mbedtls_dhm_context * | dhm, |
const unsigned char * | dhmin, | ||
size_t | dhminlen | ||
) |
This function parses DHM parameters in PEM or DER format.
dhm | The DHM context to initialize. |
dhmin | The input buffer. |
dhminlen | The size of the buffer, including the terminating null Byte for PEM data. |
0
on success, or a specific DHM or PEM error code on failure. int mbedtls_dhm_parse_dhmfile | ( | mbedtls_dhm_context * | dhm, |
const char * | path | ||
) |
This function loads and parses DHM parameters from a file.
dhm | The DHM context to load the parameters to. |
path | The filename to read the DHM parameters from. |
0
on success, or a specific DHM or PEM error code on failure. void mbedtls_x509_crl_free | ( | mbedtls_x509_crl * | crl | ) |
Unallocate all CRL data.
crl | CRL chain to free |
int mbedtls_x509_crl_info | ( | char * | buf, |
size_t | size, | ||
const char * | prefix, | ||
const mbedtls_x509_crl * | crl | ||
) |
Returns an informational string about the CRL.
buf | Buffer to write to |
size | Maximum size of buffer |
prefix | A line prefix |
crl | The X509 CRL to represent |
void mbedtls_x509_crl_init | ( | mbedtls_x509_crl * | crl | ) |
Initialize a CRL (chain)
crl | CRL chain to initialize |
int mbedtls_x509_crl_parse | ( | mbedtls_x509_crl * | chain, |
const unsigned char * | buf, | ||
size_t | buflen | ||
) |
Parse one or more CRLs and append them to the chained list.
chain | points to the start of the chain |
buf | buffer holding the CRL data in PEM or DER format |
buflen | size of the buffer (including the terminating null byte for PEM data) |
int mbedtls_x509_crl_parse_der | ( | mbedtls_x509_crl * | chain, |
const unsigned char * | buf, | ||
size_t | buflen | ||
) |
Parse a DER-encoded CRL and append it to the chained list.
chain | points to the start of the chain |
buf | buffer holding the CRL data in DER format |
buflen | size of the buffer (including the terminating null byte for PEM data) |
int mbedtls_x509_crl_parse_file | ( | mbedtls_x509_crl * | chain, |
const char * | path | ||
) |
Load one or more CRLs and append them to the chained list.
chain | points to the start of the chain |
path | filename to read the CRLs from (in PEM or DER encoding) |
int mbedtls_x509_crt_check_extended_key_usage | ( | const mbedtls_x509_crt * | crt, |
const char * | usage_oid, | ||
size_t | usage_len | ||
) |
Check usage of certificate against extendedKeyUsage.
crt | Leaf certificate used. |
usage_oid | Intended usage (eg MBEDTLS_OID_SERVER_AUTH or MBEDTLS_OID_CLIENT_AUTH). |
usage_len | Length of usage_oid (eg given by MBEDTLS_OID_SIZE()). |
int mbedtls_x509_crt_check_key_usage | ( | const mbedtls_x509_crt * | crt, |
unsigned int | usage | ||
) |
Check usage of certificate against keyUsage extension.
crt | Leaf certificate used. |
usage | Intended usage(s) (eg MBEDTLS_X509_KU_KEY_ENCIPHERMENT before using the certificate to perform an RSA key exchange). |
mbedtls_x509_crt_verify()
. void mbedtls_x509_crt_free | ( | mbedtls_x509_crt * | crt | ) |
Unallocate all certificate data.
crt | Certificate chain to free |
int mbedtls_x509_crt_info | ( | char * | buf, |
size_t | size, | ||
const char * | prefix, | ||
const mbedtls_x509_crt * | crt | ||
) |
Returns an informational string about the certificate.
buf | Buffer to write to |
size | Maximum size of buffer |
prefix | A line prefix |
crt | The X509 certificate to represent |
void mbedtls_x509_crt_init | ( | mbedtls_x509_crt * | crt | ) |
Initialize a certificate (chain)
crt | Certificate chain to initialize |
int mbedtls_x509_crt_is_revoked | ( | const mbedtls_x509_crt * | crt, |
const mbedtls_x509_crl * | crl | ||
) |
Verify the certificate revocation status.
crt | a certificate to be verified |
crl | the CRL to verify against |
int mbedtls_x509_crt_parse | ( | mbedtls_x509_crt * | chain, |
const unsigned char * | buf, | ||
size_t | buflen | ||
) |
Parse one or more certificates and add them to the chained list.
Parses permissively. If some certificates can be parsed, the result is the number of failed certificates it encountered. If none complete correctly, the first error is returned.
chain | points to the start of the chain |
buf | buffer holding the certificate data in PEM or DER format |
buflen | size of the buffer (including the terminating null byte for PEM data) |
int mbedtls_x509_crt_parse_der | ( | mbedtls_x509_crt * | chain, |
const unsigned char * | buf, | ||
size_t | buflen | ||
) |
Parse a single DER formatted certificate and add it to the chained list.
chain | points to the start of the chain |
buf | buffer holding the certificate DER data |
buflen | size of the buffer |
int mbedtls_x509_crt_parse_file | ( | mbedtls_x509_crt * | chain, |
const char * | path | ||
) |
Load one or more certificates and add them to the chained list.
Parses permissively. If some certificates can be parsed, the result is the number of failed certificates it encountered. If none complete correctly, the first error is returned.
chain | points to the start of the chain |
path | filename to read the certificates from |
int mbedtls_x509_crt_parse_path | ( | mbedtls_x509_crt * | chain, |
const char * | path | ||
) |
Load one or more certificate files from a path and add them to the chained list.
Parses permissively. If some certificates can be parsed, the result is the number of failed certificates it encountered. If none complete correctly, the first error is returned.
chain | points to the start of the chain |
path | directory / folder to read the certificate files from |
int mbedtls_x509_crt_verify | ( | mbedtls_x509_crt * | crt, |
mbedtls_x509_crt * | trust_ca, | ||
mbedtls_x509_crl * | ca_crl, | ||
const char * | cn, | ||
uint32_t * | flags, | ||
int(*)(void *, mbedtls_x509_crt *, int, uint32_t *) | f_vrfy, | ||
void * | p_vrfy | ||
) |
Verify the certificate signature.
The verify callback is a user-supplied callback that can clear / modify / add flags for a certificate. If set, the verification callback is called for each certificate in the chain (from the trust-ca down to the presented crt). The parameters for the callback are: (void *parameter, mbedtls_x509_crt *crt, int certificate_depth, int *flags). With the flags representing current flags for that specific certificate and the certificate depth from the bottom (Peer cert depth = 0).
All flags left after returning from the callback are also returned to the application. The function should return 0 for anything (including invalid certificates) other than fatal error, as a non-zero return code immediately aborts the verification process. For fatal errors, a specific error code should be used (different from MBEDTLS_ERR_X509_CERT_VERIFY_FAILED which should not be returned at this point), or MBEDTLS_ERR_X509_FATAL_ERROR can be used if no better code is available.
mbedtls_x509_crt_verify_info()
mbedtls_x509_crt_verify_with_profile()
with the default security profile.crt | a certificate (chain) to be verified |
trust_ca | the list of trusted CAs |
ca_crl | the list of CRLs for trusted CAs (see note above) |
cn | expected Common Name (can be set to NULL if the CN must not be verified) |
flags | result of the verification |
f_vrfy | verification function |
p_vrfy | verification parameter |
int mbedtls_x509_crt_verify_info | ( | char * | buf, |
size_t | size, | ||
const char * | prefix, | ||
uint32_t | flags | ||
) |
Returns an informational string about the verification status of a certificate.
buf | Buffer to write to |
size | Maximum size of buffer |
prefix | A line prefix |
flags | Verification flags created by mbedtls_x509_crt_verify() |
int mbedtls_x509_crt_verify_with_profile | ( | mbedtls_x509_crt * | crt, |
mbedtls_x509_crt * | trust_ca, | ||
mbedtls_x509_crl * | ca_crl, | ||
const mbedtls_x509_crt_profile * | profile, | ||
const char * | cn, | ||
uint32_t * | flags, | ||
int(*)(void *, mbedtls_x509_crt *, int, uint32_t *) | f_vrfy, | ||
void * | p_vrfy | ||
) |
Verify the certificate signature according to profile.
mbedtls_x509_crt_verify()
, but with explicit security profile.crt | a certificate (chain) to be verified |
trust_ca | the list of trusted CAs |
ca_crl | the list of CRLs for trusted CAs |
profile | security profile for verification |
cn | expected Common Name (can be set to NULL if the CN must not be verified) |
flags | result of the verification |
f_vrfy | verification function |
p_vrfy | verification parameter |
void mbedtls_x509_csr_free | ( | mbedtls_x509_csr * | csr | ) |
Unallocate all CSR data.
csr | CSR to free |
int mbedtls_x509_csr_info | ( | char * | buf, |
size_t | size, | ||
const char * | prefix, | ||
const mbedtls_x509_csr * | csr | ||
) |
Returns an informational string about the CSR.
buf | Buffer to write to |
size | Maximum size of buffer |
prefix | A line prefix |
csr | The X509 CSR to represent |
void mbedtls_x509_csr_init | ( | mbedtls_x509_csr * | csr | ) |
Initialize a CSR.
csr | CSR to initialize |
int mbedtls_x509_csr_parse | ( | mbedtls_x509_csr * | csr, |
const unsigned char * | buf, | ||
size_t | buflen | ||
) |
Load a Certificate Signing Request (CSR), DER or PEM format.
mbedtls_x509_csr_parse_der()
csr | CSR context to fill |
buf | buffer holding the CRL data |
buflen | size of the buffer (including the terminating null byte for PEM data) |
int mbedtls_x509_csr_parse_der | ( | mbedtls_x509_csr * | csr, |
const unsigned char * | buf, | ||
size_t | buflen | ||
) |
Load a Certificate Signing Request (CSR) in DER format.
csr | CSR context to fill |
buf | buffer holding the CRL data |
buflen | size of the buffer |
int mbedtls_x509_csr_parse_file | ( | mbedtls_x509_csr * | csr, |
const char * | path | ||
) |
Load a Certificate Signing Request (CSR)
mbedtls_x509_csr_parse()
csr | CSR context to fill |
path | filename to read the CSR from |
const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_default |
Default security profile.
Should provide a good balance between security and compatibility with current deployments.
const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_next |
Expected next default profile.
Recommended for new deployments. Currently targets a 128-bit security level, except for RSA-2048.