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Get rid of another unconstify through API changes
This also makes the code in read_client_first_message() more similar to read_client_final_message(). Reported-by: Mark Dilger <hornschnorter@gmail.com> Discussion: https://www.postgresql.org/message-id/flat/53a28052-f9f3-1808-fed9-460fd43035ab%402ndquadrant.com
This commit is contained in:
Peter Eisentraut
parent
4b3b07fd5d
commit
86eea78694
@ -155,8 +155,8 @@ typedef struct
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char *logdetail;
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} scram_state;
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static void read_client_first_message(scram_state *state, char *input);
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static void read_client_final_message(scram_state *state, char *input);
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static void read_client_first_message(scram_state *state, const char *input);
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static void read_client_final_message(scram_state *state, const char *input);
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static char *build_server_first_message(scram_state *state);
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static char *build_server_final_message(scram_state *state);
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static bool verify_client_proof(scram_state *state);
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@ -327,7 +327,7 @@ pg_be_scram_init(Port *port,
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* the client).
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*/
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int
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pg_be_scram_exchange(void *opaq, char *input, int inputlen,
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pg_be_scram_exchange(void *opaq, const char *input, int inputlen,
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char **output, int *outputlen, char **logdetail)
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{
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scram_state *state = (scram_state *) opaq;
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@ -811,11 +811,11 @@ read_any_attr(char **input, char *attr_p)
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* At this stage, any errors will be reported directly with ereport(ERROR).
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*/
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static void
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read_client_first_message(scram_state *state, char *input)
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read_client_first_message(scram_state *state, const char *input)
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{
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char *p = pstrdup(input);
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char *channel_binding_type;
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input = pstrdup(input);
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/*------
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* The syntax for the client-first-message is: (RFC 5802)
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@ -881,8 +881,8 @@ read_client_first_message(scram_state *state, char *input)
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* Read gs2-cbind-flag. (For details see also RFC 5802 Section 6 "Channel
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* Binding".)
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*/
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state->cbind_flag = *input;
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switch (*input)
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state->cbind_flag = *p;
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switch (*p)
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{
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case 'n':
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@ -896,14 +896,14 @@ read_client_first_message(scram_state *state, char *input)
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errmsg("malformed SCRAM message"),
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errdetail("The client selected SCRAM-SHA-256-PLUS, but the SCRAM message does not include channel binding data.")));
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input++;
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if (*input != ',')
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p++;
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if (*p != ',')
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ereport(ERROR,
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(errcode(ERRCODE_PROTOCOL_VIOLATION),
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errmsg("malformed SCRAM message"),
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errdetail("Comma expected, but found character \"%s\".",
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sanitize_char(*input))));
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input++;
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sanitize_char(*p))));
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p++;
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break;
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case 'y':
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@ -926,14 +926,14 @@ read_client_first_message(scram_state *state, char *input)
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errdetail("The client supports SCRAM channel binding but thinks the server does not. "
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"However, this server does support channel binding.")));
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#endif
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input++;
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if (*input != ',')
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p++;
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if (*p != ',')
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ereport(ERROR,
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(errcode(ERRCODE_PROTOCOL_VIOLATION),
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errmsg("malformed SCRAM message"),
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errdetail("Comma expected, but found character \"%s\".",
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sanitize_char(*input))));
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input++;
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sanitize_char(*p))));
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p++;
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break;
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case 'p':
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@ -947,7 +947,7 @@ read_client_first_message(scram_state *state, char *input)
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errmsg("malformed SCRAM message"),
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errdetail("The client selected SCRAM-SHA-256 without channel binding, but the SCRAM message includes channel binding data.")));
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channel_binding_type = read_attr_value(&input, 'p');
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channel_binding_type = read_attr_value(&p, 'p');
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/*
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* The only channel binding type we support is
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@ -964,25 +964,25 @@ read_client_first_message(scram_state *state, char *input)
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(errcode(ERRCODE_PROTOCOL_VIOLATION),
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errmsg("malformed SCRAM message"),
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errdetail("Unexpected channel-binding flag \"%s\".",
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sanitize_char(*input))));
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sanitize_char(*p))));
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}
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/*
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* Forbid optional authzid (authorization identity). We don't support it.
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*/
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if (*input == 'a')
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if (*p == 'a')
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ereport(ERROR,
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(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
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errmsg("client uses authorization identity, but it is not supported")));
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if (*input != ',')
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if (*p != ',')
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ereport(ERROR,
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(errcode(ERRCODE_PROTOCOL_VIOLATION),
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errmsg("malformed SCRAM message"),
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errdetail("Unexpected attribute \"%s\" in client-first-message.",
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sanitize_char(*input))));
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input++;
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sanitize_char(*p))));
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p++;
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state->client_first_message_bare = pstrdup(input);
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state->client_first_message_bare = pstrdup(p);
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/*
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* Any mandatory extensions would go here. We don't support any.
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@ -991,7 +991,7 @@ read_client_first_message(scram_state *state, char *input)
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* but it can only be sent in the server-final message. We prefer to fail
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* immediately (which the RFC also allows).
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*/
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if (*input == 'm')
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if (*p == 'm')
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ereport(ERROR,
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(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
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errmsg("client requires an unsupported SCRAM extension")));
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@ -1001,10 +1001,10 @@ read_client_first_message(scram_state *state, char *input)
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* startup message instead, still it is kept around if provided as it
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* proves to be useful for debugging purposes.
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*/
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state->client_username = read_attr_value(&input, 'n');
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state->client_username = read_attr_value(&p, 'n');
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/* read nonce and check that it is made of only printable characters */
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state->client_nonce = read_attr_value(&input, 'r');
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state->client_nonce = read_attr_value(&p, 'r');
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if (!is_scram_printable(state->client_nonce))
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ereport(ERROR,
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(errcode(ERRCODE_PROTOCOL_VIOLATION),
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@ -1014,8 +1014,8 @@ read_client_first_message(scram_state *state, char *input)
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* There can be any number of optional extensions after this. We don't
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* support any extensions, so ignore them.
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*/
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while (*input != '\0')
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read_any_attr(&input, NULL);
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while (*p != '\0')
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read_any_attr(&p, NULL);
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/* success! */
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}
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@ -1144,7 +1144,7 @@ build_server_first_message(scram_state *state)
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* Read and parse the final message received from client.
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*/
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static void
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read_client_final_message(scram_state *state, char *input)
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read_client_final_message(scram_state *state, const char *input)
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{
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char attr;
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char *channel_binding;
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@ -985,7 +985,7 @@ CheckSCRAMAuth(Port *port, char *shadow_pass, char **logdetail)
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* we pass 'logdetail' as NULL when doing a mock authentication,
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* because we should already have a better error message in that case
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*/
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result = pg_be_scram_exchange(scram_opaq, unconstify(char *, input), inputlen,
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result = pg_be_scram_exchange(scram_opaq, input, inputlen,
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&output, &outputlen,
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logdetail);
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@ -24,7 +24,7 @@
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/* Routines dedicated to authentication */
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extern void pg_be_scram_get_mechanisms(Port *port, StringInfo buf);
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extern void *pg_be_scram_init(Port *port, const char *selected_mech, const char *shadow_pass);
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extern int pg_be_scram_exchange(void *opaq, char *input, int inputlen,
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extern int pg_be_scram_exchange(void *opaq, const char *input, int inputlen,
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char **output, int *outputlen, char **logdetail);
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/* Routines to handle and check SCRAM-SHA-256 verifier */
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