diff options
Diffstat (limited to 'lib/vauth/digest.c')
| -rw-r--r-- | lib/vauth/digest.c | 194 |
1 files changed, 152 insertions, 42 deletions
diff --git a/lib/vauth/digest.c b/lib/vauth/digest.c index 185098ed..131d9da8 100644 --- a/lib/vauth/digest.c +++ b/lib/vauth/digest.c @@ -19,6 +19,7 @@ * KIND, either express or implied. * * RFC2831 DIGEST-MD5 authentication + * RFC7616 DIGEST-SHA256, DIGEST-SHA512-256 authentication * ***************************************************************************/ @@ -34,6 +35,7 @@ #include "curl_base64.h" #include "curl_hmac.h" #include "curl_md5.h" +#include "curl_sha256.h" #include "vtls/vtls.h" #include "warnless.h" #include "strtok.h" @@ -144,6 +146,15 @@ static void auth_digest_md5_to_ascii(unsigned char *source, /* 16 bytes */ snprintf((char *) &dest[i * 2], 3, "%02x", source[i]); } +/* Convert sha256 chunk to RFC7616 -suitable ascii string*/ +static void auth_digest_sha256_to_ascii(unsigned char *source, /* 32 bytes */ + unsigned char *dest) /* 65 bytes */ +{ + int i; + for(i = 0; i < 32; i++) + snprintf((char *) &dest[i * 2], 3, "%02x", source[i]); +} + /* Perform quoted-string escaping as described in RFC2616 and its errata */ static char *auth_digest_string_quoted(const char *source) { @@ -602,9 +613,22 @@ CURLcode Curl_auth_decode_digest_http_message(const char *chlg, digest->algo = CURLDIGESTALGO_MD5SESS; else if(strcasecompare(content, "MD5")) digest->algo = CURLDIGESTALGO_MD5; + else if(strcasecompare(content, "SHA-256")) + digest->algo = CURLDIGESTALGO_SHA256; + else if(strcasecompare(content, "SHA-256-SESS")) + digest->algo = CURLDIGESTALGO_SHA256SESS; + else if(strcasecompare(content, "SHA-512-256")) + digest->algo = CURLDIGESTALGO_SHA512_256; + else if(strcasecompare(content, "SHA-512-256-SESS")) + digest->algo = CURLDIGESTALGO_SHA512_256SESS; else return CURLE_BAD_CONTENT_ENCODING; } + else if(strcasecompare(value, "userhash")) { + if(strcasecompare(content, "true")) { + digest->userhash = TRUE; + } + } else { /* Unknown specifier, ignore it! */ } @@ -635,7 +659,7 @@ CURLcode Curl_auth_decode_digest_http_message(const char *chlg, } /* - * Curl_auth_create_digest_http_message() + * _Curl_auth_create_digest_http_message() * * This is used to generate a HTTP DIGEST response message ready for sending * to the recipient. @@ -654,20 +678,24 @@ CURLcode Curl_auth_decode_digest_http_message(const char *chlg, * * Returns CURLE_OK on success. */ -CURLcode Curl_auth_create_digest_http_message(struct Curl_easy *data, - const char *userp, - const char *passwdp, - const unsigned char *request, - const unsigned char *uripath, - struct digestdata *digest, - char **outptr, size_t *outlen) +static CURLcode _Curl_auth_create_digest_http_message( + struct Curl_easy *data, + const char *userp, + const char *passwdp, + const unsigned char *request, + const unsigned char *uripath, + struct digestdata *digest, + char **outptr, size_t *outlen, + void (*convert_to_ascii)(unsigned char *, unsigned char *), + void (*hash)(unsigned char *, const unsigned char *)) { CURLcode result; - unsigned char md5buf[16]; /* 16 bytes/128 bits */ - unsigned char request_digest[33]; - unsigned char *md5this; - unsigned char ha1[33]; /* 32 digits and 1 zero byte */ - unsigned char ha2[33]; /* 32 digits and 1 zero byte */ + unsigned char hashbuf[32]; /* 32 bytes/256 bits */ + unsigned char request_digest[65]; + unsigned char *hashthis; + unsigned char ha1[65]; /* 64 digits and 1 zero byte */ + unsigned char ha2[65]; /* 64 digits and 1 zero byte */ + char userh[65]; char cnoncebuf[33]; char *cnonce = NULL; size_t cnonce_sz = 0; @@ -692,6 +720,17 @@ CURLcode Curl_auth_create_digest_http_message(struct Curl_easy *data, digest->cnonce = cnonce; } + if(digest->userhash) { + hashthis = (unsigned char *) aprintf("%s:%s", userp, digest->realm); + if(!hashthis) + return CURLE_OUT_OF_MEMORY; + + CURL_OUTPUT_DIGEST_CONV(data, hashthis); + hash(hashbuf, hashthis); + free(hashthis); + convert_to_ascii(hashbuf, (unsigned char *)userh); + } + /* If the algorithm is "MD5" or unspecified (which then defaults to MD5): @@ -703,26 +742,29 @@ CURLcode Curl_auth_create_digest_http_message(struct Curl_easy *data, unq(nonce-value) ":" unq(cnonce-value) */ - md5this = (unsigned char *) - aprintf("%s:%s:%s", userp, digest->realm, passwdp); - if(!md5this) + hashthis = (unsigned char *) + aprintf("%s:%s:%s", digest->userhash ? userh : userp, + digest->realm, passwdp); + if(!hashthis) return CURLE_OUT_OF_MEMORY; - CURL_OUTPUT_DIGEST_CONV(data, md5this); /* convert on non-ASCII machines */ - Curl_md5it(md5buf, md5this); - free(md5this); - auth_digest_md5_to_ascii(md5buf, ha1); + CURL_OUTPUT_DIGEST_CONV(data, hashthis); /* convert on non-ASCII machines */ + hash(hashbuf, hashthis); + free(hashthis); + convert_to_ascii(hashbuf, ha1); - if(digest->algo == CURLDIGESTALGO_MD5SESS) { + if(digest->algo == CURLDIGESTALGO_MD5SESS || + digest->algo == CURLDIGESTALGO_SHA256SESS || + digest->algo == CURLDIGESTALGO_SHA512_256SESS) { /* nonce and cnonce are OUTSIDE the hash */ tmp = aprintf("%s:%s:%s", ha1, digest->nonce, digest->cnonce); if(!tmp) return CURLE_OUT_OF_MEMORY; CURL_OUTPUT_DIGEST_CONV(data, tmp); /* Convert on non-ASCII machines */ - Curl_md5it(md5buf, (unsigned char *) tmp); + hash(hashbuf, (unsigned char *) tmp); free(tmp); - auth_digest_md5_to_ascii(md5buf, ha1); + convert_to_ascii(hashbuf, ha1); } /* @@ -738,27 +780,32 @@ CURLcode Curl_auth_create_digest_http_message(struct Curl_easy *data, 5.1.1 of RFC 2616) */ - md5this = (unsigned char *) aprintf("%s:%s", request, uripath); + hashthis = (unsigned char *) aprintf("%s:%s", request, uripath); if(digest->qop && strcasecompare(digest->qop, "auth-int")) { /* We don't support auth-int for PUT or POST at the moment. - TODO: replace md5 of empty string with entity-body for PUT/POST */ - unsigned char *md5this2 = (unsigned char *) - aprintf("%s:%s", md5this, "d41d8cd98f00b204e9800998ecf8427e"); - free(md5this); - md5this = md5this2; + TODO: replace hash of empty string with entity-body for PUT/POST */ + char hashed[65]; + unsigned char *hashthis2; + + hash(hashbuf, (const unsigned char *)""); + convert_to_ascii(hashbuf, (unsigned char *)hashed); + + hashthis2 = (unsigned char *)aprintf("%s:%s", hashthis, hashed); + free(hashthis); + hashthis = hashthis2; } - if(!md5this) + if(!hashthis) return CURLE_OUT_OF_MEMORY; - CURL_OUTPUT_DIGEST_CONV(data, md5this); /* convert on non-ASCII machines */ - Curl_md5it(md5buf, md5this); - free(md5this); - auth_digest_md5_to_ascii(md5buf, ha2); + CURL_OUTPUT_DIGEST_CONV(data, hashthis); /* convert on non-ASCII machines */ + hash(hashbuf, hashthis); + free(hashthis); + convert_to_ascii(hashbuf, ha2); if(digest->qop) { - md5this = (unsigned char *) aprintf("%s:%s:%08x:%s:%s:%s", + hashthis = (unsigned char *) aprintf("%s:%s:%08x:%s:%s:%s", ha1, digest->nonce, digest->nc, @@ -767,19 +814,19 @@ CURLcode Curl_auth_create_digest_http_message(struct Curl_easy *data, ha2); } else { - md5this = (unsigned char *) aprintf("%s:%s:%s", + hashthis = (unsigned char *) aprintf("%s:%s:%s", ha1, digest->nonce, ha2); } - if(!md5this) + if(!hashthis) return CURLE_OUT_OF_MEMORY; - CURL_OUTPUT_DIGEST_CONV(data, md5this); /* convert on non-ASCII machines */ - Curl_md5it(md5buf, md5this); - free(md5this); - auth_digest_md5_to_ascii(md5buf, request_digest); + CURL_OUTPUT_DIGEST_CONV(data, hashthis); /* convert on non-ASCII machines */ + hash(hashbuf, hashthis); + free(hashthis); + convert_to_ascii(hashbuf, request_digest); /* For test case 64 (snooped from a Mozilla 1.3a request) @@ -794,7 +841,7 @@ CURLcode Curl_auth_create_digest_http_message(struct Curl_easy *data, characters. algorithm and qop with standard values only contain web-safe characters. */ - userp_quoted = auth_digest_string_quoted(userp); + userp_quoted = auth_digest_string_quoted(digest->userhash ? userh : userp); if(!userp_quoted) return CURLE_OUT_OF_MEMORY; @@ -858,6 +905,16 @@ CURLcode Curl_auth_create_digest_http_message(struct Curl_easy *data, response = tmp; } + if(digest->userhash) { + /* Append the userhash */ + tmp = aprintf("%s, userhash=true", response); + free(response); + if(!tmp) + return CURLE_OUT_OF_MEMORY; + + response = tmp; + } + /* Return the output */ *outptr = response; *outlen = strlen(response); @@ -866,6 +923,58 @@ CURLcode Curl_auth_create_digest_http_message(struct Curl_easy *data, } /* + * Curl_auth_create_digest_http_message() + * + * This is used to generate a HTTP DIGEST response message ready for sending + * to the recipient. + * + * Parameters: + * + * data [in] - The session handle. + * userp [in] - The user name. + * passdwp [in] - The user's password. + * request [in] - The HTTP request. + * uripath [in] - The path of the HTTP uri. + * digest [in/out] - The digest data struct being used and modified. + * outptr [in/out] - The address where a pointer to newly allocated memory + * holding the result will be stored upon completion. + * outlen [out] - The length of the output message. + * + * Returns CURLE_OK on success. + */ +CURLcode Curl_auth_create_digest_http_message(struct Curl_easy *data, + const char *userp, + const char *passwdp, + const unsigned char *request, + const unsigned char *uripath, + struct digestdata *digest, + char **outptr, size_t *outlen) +{ + switch(digest->algo) { + case CURLDIGESTALGO_MD5: + case CURLDIGESTALGO_MD5SESS: + return _Curl_auth_create_digest_http_message(data, userp, passwdp, + request, uripath, digest, + outptr, outlen, + auth_digest_md5_to_ascii, + Curl_md5it); + + case CURLDIGESTALGO_SHA256: + case CURLDIGESTALGO_SHA256SESS: + case CURLDIGESTALGO_SHA512_256: + case CURLDIGESTALGO_SHA512_256SESS: + return _Curl_auth_create_digest_http_message(data, userp, passwdp, + request, uripath, digest, + outptr, outlen, + auth_digest_sha256_to_ascii, + Curl_sha256it); + + default: + return CURLE_UNSUPPORTED_PROTOCOL; + } +} + +/* * Curl_auth_digest_cleanup() * * This is used to clean up the digest specific data. @@ -887,6 +996,7 @@ void Curl_auth_digest_cleanup(struct digestdata *digest) digest->nc = 0; digest->algo = CURLDIGESTALGO_MD5; /* default algorithm */ digest->stale = FALSE; /* default means normal, not stale */ + digest->userhash = FALSE; } #endif /* !USE_WINDOWS_SSPI */ |